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UBSAN reports signed integer overflow in kernel/futex.c:
UBSAN: Undefined behaviour in kernel/futex.c:2041:18
signed integer overflow:
0 - -2147483648 cannot be represented in type 'int'
Add a sanity check to catch negative values of nr_wake and nr_requeue.
Signed-off-by: Li Jinyue <lijinyue@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: peterz@infradead.org
Cc: dvhart@infradead.org
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/1513242294-31786-1-git-send-email-lijinyue@huawei.com
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Julia reported futex state corruption in the following scenario:
waiter waker stealer (prio > waiter)
futex(WAIT_REQUEUE_PI, uaddr, uaddr2,
timeout=[N ms])
futex_wait_requeue_pi()
futex_wait_queue_me()
freezable_schedule()
<scheduled out>
futex(LOCK_PI, uaddr2)
futex(CMP_REQUEUE_PI, uaddr,
uaddr2, 1, 0)
/* requeues waiter to uaddr2 */
futex(UNLOCK_PI, uaddr2)
wake_futex_pi()
cmp_futex_value_locked(uaddr2, waiter)
wake_up_q()
<woken by waker>
<hrtimer_wakeup() fires,
clears sleeper->task>
futex(LOCK_PI, uaddr2)
__rt_mutex_start_proxy_lock()
try_to_take_rt_mutex() /* steals lock */
rt_mutex_set_owner(lock, stealer)
<preempted>
<scheduled in>
rt_mutex_wait_proxy_lock()
__rt_mutex_slowlock()
try_to_take_rt_mutex() /* fails, lock held by stealer */
if (timeout && !timeout->task)
return -ETIMEDOUT;
fixup_owner()
/* lock wasn't acquired, so,
fixup_pi_state_owner skipped */
return -ETIMEDOUT;
/* At this point, we've returned -ETIMEDOUT to userspace, but the
* futex word shows waiter to be the owner, and the pi_mutex has
* stealer as the owner */
futex_lock(LOCK_PI, uaddr2)
-> bails with EDEADLK, futex word says we're owner.
And suggested that what commit:
73d786bd043e ("futex: Rework inconsistent rt_mutex/futex_q state")
removes from fixup_owner() looks to be just what is needed. And indeed
it is -- I completely missed that requeue_pi could also result in this
case. So we need to restore that, except that subsequent patches, like
commit:
16ffa12d7425 ("futex: Pull rt_mutex_futex_unlock() out from under hb->lock")
changed all the locking rules. Even without that, the sequence:
- if (rt_mutex_futex_trylock(&q->pi_state->pi_mutex)) {
- locked = 1;
- goto out;
- }
- raw_spin_lock_irq(&q->pi_state->pi_mutex.wait_lock);
- owner = rt_mutex_owner(&q->pi_state->pi_mutex);
- if (!owner)
- owner = rt_mutex_next_owner(&q->pi_state->pi_mutex);
- raw_spin_unlock_irq(&q->pi_state->pi_mutex.wait_lock);
- ret = fixup_pi_state_owner(uaddr, q, owner);
already suggests there were races; otherwise we'd never have to look
at next_owner.
So instead of doing 3 consecutive wait_lock sections with who knows
what races, we do it all in a single section. Additionally, the usage
of pi_state->owner in fixup_owner() was only safe because only the
rt_mutex owner would modify it, which this additional case wrecks.
Luckily the values can only change away and not to the value we're
testing, this means we can do a speculative test and double check once
we have the wait_lock.
Fixes: 73d786bd043e ("futex: Rework inconsistent rt_mutex/futex_q state")
Reported-by: Julia Cartwright <julia@ni.com>
Reported-by: Gratian Crisan <gratian.crisan@ni.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Julia Cartwright <julia@ni.com>
Tested-by: Gratian Crisan <gratian.crisan@ni.com>
Cc: Darren Hart <dvhart@infradead.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20171208124939.7livp7no2ov65rrc@hirez.programming.kicks-ass.net
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"Two pending (non-PTI) x86 fixes:
- an Intel-MID crash fix
- and an Intel microcode loader blacklist quirk to avoid a
problematic revision"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/platform/intel-mid: Revert "Make 'bt_sfi_data' const"
x86/microcode/intel: Extend BDW late-loading with a revision check
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So one of the constification patches unearthed a type casting fragility
of the underlying code:
276c87054751 ("x86/platform/intel-mid: Make 'bt_sfi_data' const")
converted the struct to be const while it is also used as a temporary
container for important data that is used to fill 'parent' and 'name'
fields in struct platform_device_info.
The compiler doesn't notice this due to an explicit type cast that loses
the const - which fragility will be fixed separately.
This type cast turned a seemingly trivial const propagation patch into a
hard to debug data corruptor and crasher bug.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Bhumika Goyal <bhumirks@gmail.com>
Cc: Darren Hart <dvhart@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: julia.lawall@lip6.fr
Cc: platform-driver-x86@vger.kernel.org
Link: http://lkml.kernel.org/r/20171228122523.21802-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Instead of blacklisting all model 79 CPUs when attempting a late
microcode loading, limit that only to CPUs with microcode revisions <
0x0b000021 because only on those late loading may cause a system hang.
For such processors either:
a) a BIOS update which might contain a newer microcode revision
or
b) the early microcode loading method
should be considered.
Processors with revisions 0x0b000021 or higher will not experience such
hangs.
For more details, see erratum BDF90 in document #334165 (Intel Xeon
Processor E7-8800/4800 v4 Product Family Specification Update) from
September 2017.
[ bp: Heavily massage commit message and pr_* statements. ]
Fixes: 723f2828a98c ("x86/microcode/intel: Disable late loading on model 79")
Signed-off-by: Jia Zhang <qianyue.zj@alibaba-inc.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Tony Luck <tony.luck@intel.com>
Cc: x86-ml <x86@kernel.org>
Cc: <stable@vger.kernel.org> # v4.14
Link: http://lkml.kernel.org/r/1514772287-92959-1-git-send-email-qianyue.zj@alibaba-inc.com
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Ingo Molnar:
"A Kconfig fix, a build fix and a membarrier bug fix"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
membarrier: Disable preemption when calling smp_call_function_many()
sched/isolation: Make CONFIG_CPU_ISOLATION=y depend on SMP or COMPILE_TEST
ia64, sched/cputime: Fix build error if CONFIG_VIRT_CPU_ACCOUNTING_NATIVE=y
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smp_call_function_many() requires disabling preemption around the call.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: <stable@vger.kernel.org> # v4.14+
Cc: Andrea Parri <parri.andrea@gmail.com>
Cc: Andrew Hunter <ahh@google.com>
Cc: Avi Kivity <avi@scylladb.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Dave Watson <davejwatson@fb.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Maged Michael <maged.michael@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul E . McKenney <paulmck@linux.vnet.ibm.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20171215192310.25293-1-mathieu.desnoyers@efficios.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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On uniprocessor systems, critical and non-critical tasks cannot be
isolated, as there is only a single CPU core. Hence enabling CPU
isolation by default on such systems does not make much sense.
Instead of changing the default for !SMP, fix this by making the feature
depend on SMP, with an override for compile-testing. Note that its sole
selector (NO_HZ_FULL) already depends on SMP.
This decreases kernel size for a default uniprocessor kernel by ca. 1 KiB.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
Cc: Frederic Weisbecker <frederic@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 2c43838c99d9d23f ("sched/isolation: Enable CONFIG_CPU_ISOLATION=y by default")
Link: http://lkml.kernel.org/r/1514891590-20782-1-git-send-email-geert@linux-m68k.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Remove the extra parenthesis.
This bug was introduced by:
e2339a4caa5e: ("ia64: Convert vtime to use nsec units directly")
Signed-off-by: Valentin Ilie <valentin.ilie@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: fenghua.yu@intel.com
Cc: linux-ia64@vger.kernel.org
Cc: tony.luck@intel.com
Link: http://lkml.kernel.org/r/1515193979-24873-1-git-send-email-valentin.ilie@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking fixes from Ingo Molnar:
"No functional effects intended: removes leftovers from recent lockdep
and refcounts work"
* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
locking/refcounts: Remove stale comment from the ARCH_HAS_REFCOUNT Kconfig entry
locking/lockdep: Remove cross-release leftovers
locking/Documentation: Remove stale crossrelease_fullstack parameter
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ARCH_HAS_REFCOUNT is no longer marked as broken ('if BROKEN'), so remove
the stale comment regarding it being broken.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20171229195303.17781-1-ebiggers3@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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There's two cross-release leftover facilities:
- the crossrelease_hist_*() irq-tracing callbacks (NOPs currently)
- the complete_release_commit() callback (NOP as well)
Remove them.
Cc: David Sterba <dsterba@suse.com>
Cc: Byungchul Park <byungchul.park@lge.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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The cross-release lockdep functionality has been removed in:
e966eaeeb623: ("locking/lockdep: Remove the cross-release locking checks")
... leaving the kernel parameter docs behind. The code handling
the parameter does not exist so this is a plain documentation change.
Signed-off-by: David Sterba <dsterba@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: byungchul.park@lge.com
Cc: linux-doc@vger.kernel.org
Link: http://lkml.kernel.org/r/20180108152731.27613-1-dsterba@suse.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen fixes from Juergen Gross:
"This contains two build fixes for clang and two fixes for rather
unlikely situations in the Xen gntdev driver"
* tag 'for-linus-4.15-rc8-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen/gntdev: Fix partial gntdev_mmap() cleanup
xen/gntdev: Fix off-by-one error when unmapping with holes
x86: xen: remove the use of VLAIS
x86/xen/time: fix section mismatch for xen_init_time_ops()
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When cleaning up after a partially successful gntdev_mmap(), unmap the
successfully mapped grant pages otherwise Xen will kill the domain if
in debug mode (Attempt to implicitly unmap a granted PTE) or Linux will
kill the process and emit "BUG: Bad page map in process" if Xen is in
release mode.
This is only needed when use_ptemod is true because gntdev_put_map()
will unmap grant pages itself when use_ptemod is false.
Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
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If the requested range has a hole, the calculation of the number of
pages to unmap is off by one. Fix it.
Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
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Variable Length Arrays In Structs (VLAIS) is not supported by Clang, and
frowned upon by others.
https://lkml.org/lkml/2013/9/23/500
Here, the VLAIS was used because the size of the bitmap returned from
xen_mc_entry() depended on possibly (based on kernel configuration)
runtime sized data. Rather than declaring args as a VLAIS then calling
sizeof on *args, we calculate the appropriate sizeof args manually.
Further, we can get rid of the #ifdef's and rely on num_possible_cpus()
(thanks to a helpful checkpatch warning from an earlier version of this
patch).
Suggested-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Nick Desaulniers <nick.desaulniers@gmail.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
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The header declares this function as __init but is defined in __ref
section.
Signed-off-by: Nick Desaulniers <nick.desaulniers@gmail.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
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Pull KVM fixes from Paolo Bonzini:
"PPC:
- user-triggerable use-after-free in HPT resizing
- stale TLB entries in the guest
- trap-and-emulate (PR) KVM guests failing to start under pHyp
x86:
- Another "Spectre" fix.
- async pagefault fix
- Revert an old fix for x86 nested virtualization, which turned out
to do more harm than good
- Check shrinker registration return code, to avoid warnings from
upcoming 4.16 -mm patches"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: x86: Add memory barrier on vmcs field lookup
KVM: x86: emulate #UD while in guest mode
x86: kvm: propagate register_shrinker return code
KVM MMU: check pending exception before injecting APF
KVM: PPC: Book3S HV: Always flush TLB in kvmppc_alloc_reset_hpt()
KVM: PPC: Book3S PR: Fix WIMG handling under pHyp
KVM: PPC: Book3S HV: Fix use after free in case of multiple resize requests
KVM: PPC: Book3S HV: Drop prepare_done from struct kvm_resize_hpt
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Topic branch for CVE-2017-5753, avoiding conflicts in the next merge window.
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This adds a memory barrier when performing a lookup into
the vmcs_field_to_offset_table. This is related to
CVE-2017-5753.
Signed-off-by: Andrew Honig <ahonig@google.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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This reverts commits ae1f57670703656cc9f293722c3b8b6782f8ab3f
and ac9b305caa0df6f5b75d294e4b86c1027648991e.
If the hardware doesn't support MOVBE, but L0 sets CPUID.01H:ECX.MOVBE
in L1's emulated CPUID information, then L1 is likely to pass that
CPUID bit through to L2. L2 will expect MOVBE to work, but if L1
doesn't intercept #UD, then any MOVBE instruction executed in L2 will
raise #UD, and the exception will be delivered in L2.
Commit ac9b305caa0df6f5b75d294e4b86c1027648991e is a better and more
complete version of ae1f57670703 ("KVM: nVMX: Do not emulate #UD while
in guest mode"); however, neither considers the above case.
Suggested-by: Jim Mattson <jmattson@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Patch "mm,vmscan: mark register_shrinker() as __must_check" is
queued for 4.16 in linux-mm and adds a warning about the unchecked
call to register_shrinker:
arch/x86/kvm/mmu.c:5485:2: warning: ignoring return value of 'register_shrinker', declared with attribute warn_unused_result [-Wunused-result]
This changes the kvm_mmu_module_init() function to fail itself
when the call to register_shrinker fails.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into kvm-master
PPC KVM fixes for 4.15
Four commits here, including two that were tagged but never merged.
Three of them are for the HPT resizing code; two of those fix a
user-triggerable use-after-free in the host, and one that fixes
stale TLB entries in the guest. The remaining commit fixes a bug
causing PR KVM guests under PowerVM to fail to start.
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The KVM_PPC_ALLOCATE_HTAB ioctl(), implemented by kvmppc_alloc_reset_hpt()
is supposed to completely clear and reset a guest's Hashed Page Table (HPT)
allocating or re-allocating it if necessary.
In the case where an HPT of the right size already exists and it just
zeroes it, it forces a TLB flush on all guest CPUs, to remove any stale TLB
entries loaded from the old HPT.
However, that situation can arise when the HPT is resizing as well - or
even when switching from an RPT to HPT - so those cases need a TLB flush as
well.
So, move the TLB flush to trigger in all cases except for errors.
Cc: stable@vger.kernel.org # v4.10+
Fixes: f98a8bf9ee20 ("KVM: PPC: Book3S HV: Allow KVM_PPC_ALLOCATE_HTAB ioctl() to change HPT size")
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
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Commit 96df226 ("KVM: PPC: Book3S PR: Preserve storage control bits")
added code to preserve WIMG bits but it missed 2 special cases:
- a magic page in kvmppc_mmu_book3s_64_xlate() and
- guest real mode in kvmppc_handle_pagefault().
For these ptes, WIMG was 0 and pHyp failed on these causing a guest to
stop in the very beginning at NIP=0x100 (due to bd9166ffe "KVM: PPC:
Book3S PR: Exit KVM on failed mapping").
According to LoPAPR v1.1 14.5.4.1.2 H_ENTER:
The hypervisor checks that the WIMG bits within the PTE are appropriate
for the physical page number else H_Parameter return. (For System Memory
pages WIMG=0010, or, 1110 if the SAO option is enabled, and for IO pages
WIMG=01**.)
This hence initializes WIMG to non-zero value HPTE_R_M (0x10), as expected
by pHyp.
[paulus@ozlabs.org - fix compile for 32-bit]
Cc: stable@vger.kernel.org # v4.11+
Fixes: 96df226 "KVM: PPC: Book3S PR: Preserve storage control bits"
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Tested-by: Ruediger Oertel <ro@suse.de>
Reviewed-by: Greg Kurz <groug@kaod.org>
Tested-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
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When serving multiple resize requests following could happen:
CPU0 CPU1
---- ----
kvm_vm_ioctl_resize_hpt_prepare(1);
-> schedule_work()
/* system_rq might be busy: delay */
kvm_vm_ioctl_resize_hpt_prepare(2);
mutex_lock();
if (resize) {
...
release_hpt_resize();
}
... resize_hpt_prepare_work()
-> schedule_work() {
mutex_unlock() /* resize->kvm could be wrong */
struct kvm *kvm = resize->kvm;
mutex_lock(&kvm->lock); <<<< UAF
...
}
i.e. a second resize request with different order could be started by
kvm_vm_ioctl_resize_hpt_prepare(), causing the previous request to be
free()d when there's still an active worker thread which will try to
access it. This leads to a use after free in point marked with UAF on
the diagram above.
To prevent this from happening, instead of unconditionally releasing a
pre-existing resize structure from the prepare ioctl(), we check if
the existing structure has an in-progress worker. We do that by
checking if the resize->error == -EBUSY, which is safe because the
resize->error field is protected by the kvm->lock. If there is an
active worker, instead of releasing, we mark the structure as stale by
unlinking it from kvm_struct.
In the worker thread we check for a stale structure (with kvm->lock
held), and in that case abort, releasing the stale structure ourself.
We make the check both before and the actual allocation. Strictly,
only the check afterwards is needed, the check before is an
optimization: if the structure happens to become stale before the
worker thread is dispatched, rather than during the allocation, it
means we can avoid allocating then immediately freeing a potentially
substantial amount of memory.
This fixes following or similar host kernel crash message:
[ 635.277361] Unable to handle kernel paging request for data at address 0x00000000
[ 635.277438] Faulting instruction address: 0xc00000000052f568
[ 635.277446] Oops: Kernel access of bad area, sig: 11 [#1]
[ 635.277451] SMP NR_CPUS=2048 NUMA PowerNV
[ 635.277470] Modules linked in: xt_CHECKSUM iptable_mangle ipt_MASQUERADE
nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4
nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 tun bridge stp llc
ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter nfsv3 nfs_acl nfs
lockd grace fscache kvm_hv kvm rpcrdma sunrpc ib_isert iscsi_target_mod ib_iser libiscsi
scsi_transport_iscsi ib_srpt target_core_mod ext4 ib_srp scsi_transport_srp
ib_ipoib mbcache jbd2 rdma_ucm ib_ucm ib_uverbs ib_umad rdma_cm ib_cm iw_cm ocrdma(T)
ib_core ses enclosure scsi_transport_sas sg shpchp leds_powernv ibmpowernv i2c_opal
i2c_core powernv_rng ipmi_powernv ipmi_devintf ipmi_msghandler ip_tables xfs
libcrc32c sr_mod sd_mod cdrom lpfc nvme_fc(T) nvme_fabrics nvme_core ipr nvmet_fc(T)
tg3 nvmet libata be2net crc_t10dif crct10dif_generic scsi_transport_fc ptp scsi_tgt
pps_core crct10dif_common dm_mirror dm_region_hash dm_log dm_mod
[ 635.278687] CPU: 40 PID: 749 Comm: kworker/40:1 Tainted: G
------------ T 3.10.0.bz1510771+ #1
[ 635.278782] Workqueue: events resize_hpt_prepare_work [kvm_hv]
[ 635.278851] task: c0000007e6840000 ti: c0000007e9180000 task.ti: c0000007e9180000
[ 635.278919] NIP: c00000000052f568 LR: c0000000009ea310 CTR: c0000000009ea4f0
[ 635.278988] REGS: c0000007e91837f0 TRAP: 0300 Tainted: G
------------ T (3.10.0.bz1510771+)
[ 635.279077] MSR: 9000000100009033 <SF,HV,EE,ME,IR,DR,RI,LE> CR: 24002022 XER:
00000000
[ 635.279248] CFAR: c000000000009368 DAR: 0000000000000000 DSISR: 40000000 SOFTE: 1
GPR00: c0000000009ea310 c0000007e9183a70 c000000001250b00 c0000007e9183b10
GPR04: 0000000000000000 0000000000000000 c0000007e9183650 0000000000000000
GPR08: c0000007ffff7b80 00000000ffffffff 0000000080000028 d00000000d2529a0
GPR12: 0000000000002200 c000000007b56800 c000000000120028 c0000007f135bb40
GPR16: 0000000000000000 c000000005c1e018 c000000005c1e018 0000000000000000
GPR20: 0000000000000001 c0000000011bf778 0000000000000001 fffffffffffffef7
GPR24: 0000000000000000 c000000f1e262e50 0000000000000002 c0000007e9180000
GPR28: c000000f1e262e4c c000000f1e262e50 0000000000000000 c0000007e9183b10
[ 635.280149] NIP [c00000000052f568] __list_add+0x38/0x110
[ 635.280197] LR [c0000000009ea310] __mutex_lock_slowpath+0xe0/0x2c0
[ 635.280253] Call Trace:
[ 635.280277] [c0000007e9183af0] [c0000000009ea310] __mutex_lock_slowpath+0xe0/0x2c0
[ 635.280356] [c0000007e9183b70] [c0000000009ea554] mutex_lock+0x64/0x70
[ 635.280426] [c0000007e9183ba0] [d00000000d24da04]
resize_hpt_prepare_work+0xe4/0x1c0 [kvm_hv]
[ 635.280507] [c0000007e9183c40] [c000000000113c0c] process_one_work+0x1dc/0x680
[ 635.280587] [c0000007e9183ce0] [c000000000114250] worker_thread+0x1a0/0x520
[ 635.280655] [c0000007e9183d80] [c00000000012010c] kthread+0xec/0x100
[ 635.280724] [c0000007e9183e30] [c00000000000a4b8] ret_from_kernel_thread+0x5c/0xa4
[ 635.280814] Instruction dump:
[ 635.280880] 7c0802a6 fba1ffe8 fbc1fff0 7cbd2b78 fbe1fff8 7c9e2378 7c7f1b78
f8010010
[ 635.281099] f821ff81 e8a50008 7fa52040 40de00b8 <e8be0000> 7fbd2840 40de008c
7fbff040
[ 635.281324] ---[ end trace b628b73449719b9d ]---
Cc: stable@vger.kernel.org # v4.10+
Fixes: b5baa6877315 ("KVM: PPC: Book3S HV: KVM-HV HPT resizing implementation")
Signed-off-by: Serhii Popovych <spopovyc@redhat.com>
[dwg: Replaced BUG_ON()s with WARN_ONs() and reworded commit message
for clarity]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
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Currently the kvm_resize_hpt structure has two fields relevant to the
state of an ongoing resize: 'prepare_done', which indicates whether
the worker thread has completed or not, and 'error' which indicates
whether it was successful or not.
Since the success/failure isn't known until completion, this is
confusingly redundant. This patch consolidates the information into
just the 'error' value: -EBUSY indicates the worked is still in
progress, other negative values indicate (completed) failure, 0
indicates successful completion.
As a bonus this reduces size of struct kvm_resize_hpt by
__alignof__(struct kvm_hpt_info) and saves few bytes of code.
While there correct comment in struct kvm_resize_hpt which references
a non-existent semaphore (leftover from an early draft).
Assert with WARN_ON() in case of HPT allocation thread work runs more
than once for resize request or resize_hpt_allocate() returns -EBUSY
that is treated specially.
Change comparison against zero to make checkpatch.pl happy.
Cc: stable@vger.kernel.org # v4.10+
Signed-off-by: Serhii Popovych <spopovyc@redhat.com>
[dwg: Changed BUG_ON()s to WARN_ON()s and altered commit message for
clarity]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
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For example, when two APF's for page ready happen after one exit and
the first one becomes pending, the second one will result in #DF.
Instead, just handle the second page fault synchronously.
Reported-by: Ross Zwisler <zwisler@gmail.com>
Message-ID: <CAOxpaSUBf8QoOZQ1p4KfUp0jq76OKfGY4Uxs-Gg8ngReD99xww@mail.gmail.com>
Reported-by: Alec Blayne <ab@tevsa.net>
Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto fix from Herbert Xu:
"This fixes a NULL pointer dereference in crypto_remove_spawns that can
be triggered through af_alg"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: algapi - fix NULL dereference in crypto_remove_spawns()
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syzkaller triggered a NULL pointer dereference in crypto_remove_spawns()
via a program that repeatedly and concurrently requests AEADs
"authenc(cmac(des3_ede-asm),pcbc-aes-aesni)" and hashes "cmac(des3_ede)"
through AF_ALG, where the hashes are requested as "untested"
(CRYPTO_ALG_TESTED is set in ->salg_mask but clear in ->salg_feat; this
causes the template to be instantiated for every request).
Although AF_ALG users really shouldn't be able to request an "untested"
algorithm, the NULL pointer dereference is actually caused by a
longstanding race condition where crypto_remove_spawns() can encounter
an instance which has had spawn(s) "grabbed" but hasn't yet been
registered, resulting in ->cra_users still being NULL.
We probably should properly initialize ->cra_users earlier, but that
would require updating many templates individually. For now just fix
the bug in a simple way that can easily be backported: make
crypto_remove_spawns() treat a NULL ->cra_users list as empty.
Reported-by: syzbot <syzkaller@googlegroups.com>
Cc: stable@vger.kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Pull MMC host fixes from Ulf Hansson:
- s3mci: mark debug_regs[] as static
- renesas_sdhi: Add MODULE_LICENSE
* tag 'mmc-v4.15-rc2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
mmc: s3mci: mark debug_regs[] as static
mmc: renesas_sdhi: Add MODULE_LICENSE
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The global array clashes with a newly added symbol of the same name:
drivers/staging/ccree/cc_debugfs.o:(.data+0x0): multiple definition of `debug_regs'
drivers/mmc/host/s3cmci.o:(.data+0x70): first defined here
We should fix both, this one addresses the s3cmci driver by removing
the symbol from the global namespace. While at it, this separates
the declaration from the type definition and makes the variable const.
Fixes: 9bdd203b4dc8 ("s3cmci: add debugfs support for examining driver and hardware state")
Fixes: b3ec9a6736f2 ("staging: ccree: staging: ccree: replace sysfs by debugfs interface")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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The following error occurs when loading renesas_sdhi_core.c module,
so add MODULE_LICENSE("GPL v2").
renesas_sdhi_core: module license 'unspecified' taints kernel.
Signed-off-by: Masaharu Hayakawa <masaharu.hayakawa.ry@renesas.com>
Fixes: 9d08428afb72 ("mmc: renesas-sdhi: make renesas_sdhi_sys_dmac main module file")
Cc: <stable@vger.kernel.org> # v4.13+
[Shimoda: Added Fixes tag and Cc to the stable ML]
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
- Nouveau: regression fix
- Tegra: regression fix
- vmwgfx: crasher + freed data leak
- i915: KASAN use after free fix, whitelist register to avoid hang fix,
GVT fixes
- vc4: irq/pm fix
* tag 'drm-fixes-for-v4.15-rc8' of git://people.freedesktop.org/~airlied/linux:
drm/i915: Don't adjust priority on an already signaled fence
drm/i915: Whitelist SLICE_COMMON_ECO_CHICKEN1 on Geminilake.
drm/vmwgfx: Potential off by one in vmw_view_add()
drm/tegra: sor: Fix hang on Tegra124 eDP
drm/vmwgfx: Don't cache framebuffer maps
drm/nouveau/disp/gf119: add missing drive vfunc ptr
drm/i915/gvt: Fix stack-out-of-bounds bug in cmd parser
drm/i915/gvt: Clear the shadow page table entry after post-sync
drm/vc4: Move IRQ enable to PM path
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git://anongit.freedesktop.org/drm/drm-intel into drm-fixes
Hopefully final drm/i915 fixes for v4.15:
- Fix a KASAN reported use after free
- Whitelist a register to avoid hangs
- GVT fixes
* tag 'drm-intel-fixes-2018-01-11-1' of git://anongit.freedesktop.org/drm/drm-intel:
drm/i915: Don't adjust priority on an already signaled fence
drm/i915: Whitelist SLICE_COMMON_ECO_CHICKEN1 on Geminilake.
drm/i915/gvt: Fix stack-out-of-bounds bug in cmd parser
drm/i915/gvt: Clear the shadow page table entry after post-sync
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When we retire a signaled fence, we free the dependency tree. However,
we skip clearing the list so that if we then try to adjust the priority
of the signaled fence, we may walk the list of freed dependencies.
[ 3083.156757] ==================================================================
[ 3083.156806] BUG: KASAN: use-after-free in execlists_schedule+0x199/0x660 [i915]
[ 3083.156810] Read of size 8 at addr ffff8806bf20f400 by task Xorg/831
[ 3083.156815] CPU: 0 PID: 831 Comm: Xorg Not tainted 4.15.0-rc6-no-psn+ #1
[ 3083.156817] Hardware name: Notebook N24_25BU/N24_25BU, BIOS 5.12 02/17/2017
[ 3083.156818] Call Trace:
[ 3083.156823] dump_stack+0x5c/0x7a
[ 3083.156827] print_address_description+0x6b/0x290
[ 3083.156830] kasan_report+0x28f/0x380
[ 3083.156872] ? execlists_schedule+0x199/0x660 [i915]
[ 3083.156914] execlists_schedule+0x199/0x660 [i915]
[ 3083.156956] ? intel_crtc_atomic_check+0x146/0x4e0 [i915]
[ 3083.156997] ? execlists_submit_request+0xe0/0xe0 [i915]
[ 3083.157038] ? i915_vma_misplaced.part.4+0x25/0xb0 [i915]
[ 3083.157079] ? __i915_vma_do_pin+0x7c8/0xc80 [i915]
[ 3083.157121] ? intel_atomic_state_alloc+0x44/0x60 [i915]
[ 3083.157130] ? drm_atomic_helper_page_flip+0x3e/0xb0 [drm_kms_helper]
[ 3083.157145] ? drm_mode_page_flip_ioctl+0x7d2/0x850 [drm]
[ 3083.157159] ? drm_ioctl_kernel+0xa7/0xf0 [drm]
[ 3083.157172] ? drm_ioctl+0x45b/0x560 [drm]
[ 3083.157211] i915_gem_object_wait_priority+0x14c/0x2c0 [i915]
[ 3083.157251] ? i915_gem_get_aperture_ioctl+0x150/0x150 [i915]
[ 3083.157290] ? i915_vma_pin_fence+0x1d8/0x320 [i915]
[ 3083.157331] ? intel_pin_and_fence_fb_obj+0x175/0x250 [i915]
[ 3083.157372] ? intel_rotation_info_size+0x60/0x60 [i915]
[ 3083.157413] ? intel_link_compute_m_n+0x80/0x80 [i915]
[ 3083.157428] ? drm_dev_printk+0x1b0/0x1b0 [drm]
[ 3083.157443] ? drm_dev_printk+0x1b0/0x1b0 [drm]
[ 3083.157485] intel_prepare_plane_fb+0x2f8/0x5a0 [i915]
[ 3083.157527] ? intel_crtc_get_vblank_counter+0x80/0x80 [i915]
[ 3083.157536] drm_atomic_helper_prepare_planes+0xa0/0x1c0 [drm_kms_helper]
[ 3083.157587] intel_atomic_commit+0x12e/0x4e0 [i915]
[ 3083.157605] drm_atomic_helper_page_flip+0xa2/0xb0 [drm_kms_helper]
[ 3083.157621] drm_mode_page_flip_ioctl+0x7d2/0x850 [drm]
[ 3083.157638] ? drm_mode_cursor2_ioctl+0x10/0x10 [drm]
[ 3083.157652] ? drm_lease_owner+0x1a/0x30 [drm]
[ 3083.157668] ? drm_mode_cursor2_ioctl+0x10/0x10 [drm]
[ 3083.157681] drm_ioctl_kernel+0xa7/0xf0 [drm]
[ 3083.157696] drm_ioctl+0x45b/0x560 [drm]
[ 3083.157711] ? drm_mode_cursor2_ioctl+0x10/0x10 [drm]
[ 3083.157725] ? drm_getstats+0x20/0x20 [drm]
[ 3083.157729] ? timerqueue_del+0x49/0x80
[ 3083.157732] ? __remove_hrtimer+0x62/0xb0
[ 3083.157735] ? hrtimer_try_to_cancel+0x173/0x210
[ 3083.157738] do_vfs_ioctl+0x13b/0x880
[ 3083.157741] ? ioctl_preallocate+0x140/0x140
[ 3083.157744] ? _raw_spin_unlock_irq+0xe/0x30
[ 3083.157746] ? do_setitimer+0x234/0x370
[ 3083.157750] ? SyS_setitimer+0x19e/0x1b0
[ 3083.157752] ? SyS_alarm+0x140/0x140
[ 3083.157755] ? __rcu_read_unlock+0x66/0x80
[ 3083.157757] ? __fget+0xc4/0x100
[ 3083.157760] SyS_ioctl+0x74/0x80
[ 3083.157763] entry_SYSCALL_64_fastpath+0x1a/0x7d
[ 3083.157765] RIP: 0033:0x7f6135d0c6a7
[ 3083.157767] RSP: 002b:00007fff01451888 EFLAGS: 00003246 ORIG_RAX: 0000000000000010
[ 3083.157769] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f6135d0c6a7
[ 3083.157771] RDX: 00007fff01451950 RSI: 00000000c01864b0 RDI: 000000000000000c
[ 3083.157772] RBP: 00007f613076f600 R08: 0000000000000001 R09: 0000000000000000
[ 3083.157773] R10: 0000000000000060 R11: 0000000000003246 R12: 0000000000000000
[ 3083.157774] R13: 0000000000000060 R14: 000000000000001b R15: 0000000000000060
[ 3083.157779] Allocated by task 831:
[ 3083.157783] kmem_cache_alloc+0xc0/0x200
[ 3083.157822] i915_gem_request_await_dma_fence+0x2c4/0x5d0 [i915]
[ 3083.157861] i915_gem_request_await_object+0x321/0x370 [i915]
[ 3083.157900] i915_gem_do_execbuffer+0x1165/0x19c0 [i915]
[ 3083.157937] i915_gem_execbuffer2+0x1ad/0x550 [i915]
[ 3083.157950] drm_ioctl_kernel+0xa7/0xf0 [drm]
[ 3083.157962] drm_ioctl+0x45b/0x560 [drm]
[ 3083.157964] do_vfs_ioctl+0x13b/0x880
[ 3083.157966] SyS_ioctl+0x74/0x80
[ 3083.157968] entry_SYSCALL_64_fastpath+0x1a/0x7d
[ 3083.157971] Freed by task 831:
[ 3083.157973] kmem_cache_free+0x77/0x220
[ 3083.158012] i915_gem_request_retire+0x72c/0xa70 [i915]
[ 3083.158051] i915_gem_request_alloc+0x1e9/0x8b0 [i915]
[ 3083.158089] i915_gem_do_execbuffer+0xa96/0x19c0 [i915]
[ 3083.158127] i915_gem_execbuffer2+0x1ad/0x550 [i915]
[ 3083.158140] drm_ioctl_kernel+0xa7/0xf0 [drm]
[ 3083.158153] drm_ioctl+0x45b/0x560 [drm]
[ 3083.158155] do_vfs_ioctl+0x13b/0x880
[ 3083.158156] SyS_ioctl+0x74/0x80
[ 3083.158158] entry_SYSCALL_64_fastpath+0x1a/0x7d
[ 3083.158162] The buggy address belongs to the object at ffff8806bf20f400
which belongs to the cache i915_dependency of size 64
[ 3083.158166] The buggy address is located 0 bytes inside of
64-byte region [ffff8806bf20f400, ffff8806bf20f440)
[ 3083.158168] The buggy address belongs to the page:
[ 3083.158171] page:00000000d43decc4 count:1 mapcount:0 mapping: (null) index:0x0
[ 3083.158174] flags: 0x17ffe0000000100(slab)
[ 3083.158179] raw: 017ffe0000000100 0000000000000000 0000000000000000 0000000180200020
[ 3083.158182] raw: ffffea001afc16c0 0000000500000005 ffff880731b881c0 0000000000000000
[ 3083.158184] page dumped because: kasan: bad access detected
[ 3083.158187] Memory state around the buggy address:
[ 3083.158190] ffff8806bf20f300: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[ 3083.158192] ffff8806bf20f380: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[ 3083.158195] >ffff8806bf20f400: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[ 3083.158196] ^
[ 3083.158199] ffff8806bf20f480: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[ 3083.158201] ffff8806bf20f500: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[ 3083.158203] ==================================================================
Reported-by: Alexandru Chirvasitu <achirvasub@gmail.com>
Reported-by: Mike Keehan <mike@keehan.net>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=104436
Fixes: 1f181225f8ec ("drm/i915/execlists: Keep request->priority for its lifetime")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Alexandru Chirvasitu <achirvasub@gmail.com>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Tested-by: Alexandru Chirvasitu <achirvasub@gmail.com>
Reviewed-by: Michał Winiarski <michal.winiarski@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180106105618.13532-1-chris@chris-wilson.co.uk
(cherry picked from commit c218ee03b9315073ce43992792554dafa0626eb8)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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Geminilake requires the 3D driver to select whether barriers are
intended for compute shaders, or tessellation control shaders, by
whacking a "Barrier Mode" bit in SLICE_COMMON_ECO_CHICKEN1 when
switching pipelines. Failure to do this properly can result in GPU
hangs.
Unfortunately, this means it needs to switch mid-batch, so only
userspace can properly set it. To facilitate this, the kernel needs
to whitelist the register.
The workarounds page currently tags this as applying to Broxton only,
but that doesn't make sense. The documentation for the register it
references says the bit userspace is supposed to toggle only exists on
Geminilake. Empirically, the Mesa patch to toggle this bit appears to
fix intermittent GPU hangs in tessellation control shader barrier tests
on Geminilake; we haven't seen those hangs on Broxton.
v2: Mention WA #0862 in the comment (it doesn't have a name).
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180105085905.9298-1-kenneth@whitecape.org
(cherry picked from commit ab062639edb0412daf6de540725276b9a5d217f9)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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drm-intel-fixes
gvt-fixes-2018-01-08
- clear shadow entry for post-sync (Zhi)
- fix stack out-of-bound warning in cmd parser (Changbin)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180108061130.ucwtumhpbfbu4psu@zhen-hp.sh.intel.com
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for_each_set_bit() only accepts variable of type unsigned long, and we can
not cast it from smaller types.
[ 16.499365] ==================================================================
[ 16.506655] BUG: KASAN: stack-out-of-bounds in find_first_bit+0x1d/0x70
[ 16.513313] Read of size 8 at addr ffff8803616cf510 by task systemd-udevd/180
[ 16.521998] CPU: 0 PID: 180 Comm: systemd-udevd Tainted: G U O 4.15.0-rc3+ #14
[ 16.530317] Hardware name: Dell Inc. OptiPlex 7040/0Y7WYT, BIOS 1.2.8 01/26/2016
[ 16.537760] Call Trace:
[ 16.540230] dump_stack+0x7c/0xbb
[ 16.543569] print_address_description+0x6b/0x290
[ 16.548306] kasan_report+0x28a/0x370
[ 16.551993] ? find_first_bit+0x1d/0x70
[ 16.555858] find_first_bit+0x1d/0x70
[ 16.559625] intel_gvt_init_cmd_parser+0x127/0x3c0 [i915]
[ 16.565060] ? __lock_is_held+0x8f/0xf0
[ 16.568990] ? intel_gvt_clean_cmd_parser+0x10/0x10 [i915]
[ 16.574514] ? __hrtimer_init+0x5d/0xb0
[ 16.578445] intel_gvt_init_device+0x2c3/0x690 [i915]
[ 16.583537] ? unregister_module_notifier+0x20/0x20
[ 16.588515] intel_gvt_init+0x89/0x100 [i915]
[ 16.592962] i915_driver_load+0x1992/0x1c70 [i915]
[ 16.597846] ? __i915_printk+0x210/0x210 [i915]
[ 16.602410] ? wait_for_completion+0x280/0x280
[ 16.606883] ? lock_downgrade+0x2c0/0x2c0
[ 16.610923] ? __pm_runtime_resume+0x46/0x90
[ 16.615238] ? acpi_dev_found+0x76/0x80
[ 16.619162] ? i915_pci_remove+0x30/0x30 [i915]
[ 16.623733] local_pci_probe+0x74/0xe0
[ 16.627518] pci_device_probe+0x208/0x310
[ 16.631561] ? pci_device_remove+0x100/0x100
[ 16.635871] ? __list_add_valid+0x29/0xa0
[ 16.639919] driver_probe_device+0x40b/0x6b0
[ 16.644223] ? driver_probe_device+0x6b0/0x6b0
[ 16.648696] __driver_attach+0x11d/0x130
[ 16.652649] bus_for_each_dev+0xe7/0x160
[ 16.656600] ? subsys_dev_iter_exit+0x10/0x10
[ 16.660987] ? __list_add_valid+0x29/0xa0
[ 16.665028] bus_add_driver+0x31d/0x3a0
[ 16.668893] driver_register+0xc6/0x170
[ 16.672758] ? 0xffffffffc0ad8000
[ 16.676108] do_one_initcall+0x9c/0x206
[ 16.679984] ? initcall_blacklisted+0x150/0x150
[ 16.684545] ? do_init_module+0x35/0x33b
[ 16.688494] ? kasan_unpoison_shadow+0x31/0x40
[ 16.692968] ? kasan_kmalloc+0xa6/0xd0
[ 16.696743] ? do_init_module+0x35/0x33b
[ 16.700694] ? kasan_unpoison_shadow+0x31/0x40
[ 16.705168] ? __asan_register_globals+0x82/0xa0
[ 16.709819] do_init_module+0xe7/0x33b
[ 16.713597] load_module+0x4481/0x4ce0
[ 16.717397] ? module_frob_arch_sections+0x20/0x20
[ 16.722228] ? vfs_read+0x13b/0x190
[ 16.725742] ? kernel_read+0x74/0xa0
[ 16.729351] ? get_user_arg_ptr.isra.17+0x70/0x70
[ 16.734099] ? SYSC_finit_module+0x175/0x1b0
[ 16.738399] SYSC_finit_module+0x175/0x1b0
[ 16.742524] ? SYSC_init_module+0x1e0/0x1e0
[ 16.746741] ? __fget+0x157/0x240
[ 16.750090] ? trace_hardirqs_on_thunk+0x1a/0x1c
[ 16.754747] entry_SYSCALL_64_fastpath+0x23/0x9a
[ 16.759397] RIP: 0033:0x7f8fbc837499
[ 16.762996] RSP: 002b:00007ffead76c138 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[ 16.770618] RAX: ffffffffffffffda RBX: 0000000000000012 RCX: 00007f8fbc837499
[ 16.777800] RDX: 0000000000000000 RSI: 000056484e67b080 RDI: 0000000000000012
[ 16.784979] RBP: 00007ffead76b140 R08: 0000000000000000 R09: 0000000000000021
[ 16.792164] R10: 0000000000000012 R11: 0000000000000246 R12: 000056484e67b460
[ 16.799345] R13: 00007ffead76b120 R14: 0000000000000005 R15: 0000000000000000
[ 16.808052] The buggy address belongs to the page:
[ 16.812876] page:00000000dc4b8c1e count:0 mapcount:0 mapping: (null) index:0x0
[ 16.820934] flags: 0x17ffffc0000000()
[ 16.824621] raw: 0017ffffc0000000 0000000000000000 0000000000000000 00000000ffffffff
[ 16.832416] raw: ffffea000d85b3e0 ffffea000d85b3e0 0000000000000000 0000000000000000
[ 16.840208] page dumped because: kasan: bad access detected
[ 16.847318] Memory state around the buggy address:
[ 16.852143] ffff8803616cf400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.859427] ffff8803616cf480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1
[ 16.866708] >ffff8803616cf500: f1 f1 04 f4 f4 f4 f3 f3 f3 f3 00 00 00 00 00 00
[ 16.873988] ^
[ 16.877770] ffff8803616cf580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.885042] ffff8803616cf600: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
[ 16.892312] ==================================================================
Signed-off-by: Changbin Du <changbin.du@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
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A shadow page table entry needs to be cleared after being set as
post-sync. This patch fixes the recent error reported in Win7-32 test.
Fixes: 2707e4446688 ("drm/i915/gvt: vGPU graphics memory virtualization")
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
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git://people.freedesktop.org/~thomash/linux into drm-fixes
Two important fixes for vmwgfx.
The off-by-one fix could cause a malicious user to potentially crash the
kernel.
The framebuffer map cache fix can under some circumstances enable a user to
read from or write to freed pages.
* 'vmwgfx-fixes-4.15' of git://people.freedesktop.org/~thomash/linux:
drm/vmwgfx: Potential off by one in vmw_view_add()
drm/vmwgfx: Don't cache framebuffer maps
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The vmw_view_cmd_to_type() function returns vmw_view_max (3) on error.
It's one element beyond the end of the vmw_view_cotables[] table.
My read on this is that it's possible to hit this failure. header->id
comes from vmw_cmd_check() and it's a user controlled number between
1040 and 1225 so we can hit that error. But I don't have the hardware
to test this code.
Fixes: d80efd5cb3de ("drm/vmwgfx: Initial DX support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Cc: <stable@vger.kernel.org>
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Buffer objects need to be either pinned or reserved while a map is active,
that's not the case here, so avoid caching the framebuffer map.
This will cause increasing mapping activity mainly when we don't do
page flipping.
This fixes occasional garbage filled screens when the framebuffer has been
evicted after the map.
Since in-kernel mapping of whole buffer objects is error-prone on 32-bit
architectures and also quite inefficient, we will revisit this later.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Cc: <stable@vger.kernel.org>
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git://anongit.freedesktop.org/tegra/linux into drm-fixes
drm/tegra: Fixes for v4.15-rc8
A single fix for a Tegra124 eDP regression introduced by the SOR changes
in v4.15-rc1.
* tag 'drm/tegra/for-4.15-rc8' of git://anongit.freedesktop.org/tegra/linux:
drm/tegra: sor: Fix hang on Tegra124 eDP
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The SOR0 found on Tegra124 and Tegra210 only supports eDP and LVDS and
therefore has a slightly different clock tree than the SOR1 which does
not support eDP, but HDMI and DP instead.
Commit e1335e2f0cfc ("drm/tegra: sor: Reimplement pad clock") breaks
setups with eDP because the sor->clk_out clock is uninitialized and
therefore setting the parent clock (either the safe clock or either of
the display PLLs) fails, which can cause hangs later on since there is
no clock driving the module.
Fix this by falling back to the module clock for sor->clk_out on those
setups. This guarantees that the module will always be clocked by an
enabled clock and hence prevents those hangs.
Fixes: e1335e2f0cfc ("drm/tegra: sor: Reimplement pad clock")
Reported-by: Guillaume Tucker <guillaume.tucker@collabora.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
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nouveau displayport regression fix.
* 'linux-4.15' of git://github.com/skeggsb/linux:
drm/nouveau/disp/gf119: add missing drive vfunc ptr
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Fixes broken dp on GF119:
Call Trace:
? nvkm_dp_train_drive+0x183/0x2c0 [nouveau]
nvkm_dp_acquire+0x4f3/0xcd0 [nouveau]
nv50_disp_super_2_2+0x5d/0x470 [nouveau]
? nvkm_devinit_pll_set+0xf/0x20 [nouveau]
gf119_disp_super+0x19c/0x2f0 [nouveau]
process_one_work+0x193/0x3c0
worker_thread+0x35/0x3b0
kthread+0x125/0x140
? process_one_work+0x3c0/0x3c0
? kthread_park+0x60/0x60
ret_from_fork+0x25/0x30
Code: Bad RIP value.
RIP: (null) RSP: ffffb1e243e4bc38
CR2: 0000000000000000
Fixes: af85389c614a drm/nouveau/disp: shuffle functions around
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=103421
Signed-off-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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git://anongit.freedesktop.org/drm/drm-misc into drm-fixes
Just one vc4 fix.
* tag 'drm-misc-fixes-2018-01-08' of git://anongit.freedesktop.org/drm/drm-misc:
drm/vc4: Move IRQ enable to PM path
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We were calling enable_irq on bind, where it was already enabled previously
by the IRQ helper. Additionally, dev->irq is not set correctly until after
postinstall and so was always zero here, triggering a warning in 4.15.
Fix both by moving the enable to the power management resume path, where we
know there was a previous disable invocation during suspend.
Fixes: 253696ccd613 ("drm/vc4: Account for interrupts in flight")
Signed-off-by: Stefan Schake <stschake@gmail.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/1514563543-32511-1-git-send-email-stschake@gmail.com
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
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