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authorKirill Korotaev <dev@openvz.org>2006-03-31 08:58:46 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-31 15:25:46 -0500
commit428622986858aebddc32d022af65e88b9d2ea8bb (patch)
tree888b968f53e55d81386836ae3f43f46cea4ad6ce /kernel
parente358c1a2c45f7ec32d77cc09a2bb42d6823a4193 (diff)
[PATCH] wrong error path in dup_fd() leading to oopses in RCU
Wrong error path in dup_fd() - it should return NULL on error, not an address of already freed memory :/ Triggered by OpenVZ stress test suite. What is interesting is that it was causing different oopses in RCU like below: Call Trace: [<c013492c>] rcu_do_batch+0x2c/0x80 [<c0134bdd>] rcu_process_callbacks+0x3d/0x70 [<c0126cf3>] tasklet_action+0x73/0xe0 [<c01269aa>] __do_softirq+0x10a/0x130 [<c01058ff>] do_softirq+0x4f/0x60 ======================= [<c0113817>] smp_apic_timer_interrupt+0x77/0x110 [<c0103b54>] apic_timer_interrupt+0x1c/0x24 Code: Bad EIP value. <0>Kernel panic - not syncing: Fatal exception in interrupt Signed-Off-By: Pavel Emelianov <xemul@sw.ru> Signed-Off-By: Dmitry Mishin <dim@openvz.org> Signed-Off-By: Kirill Korotaev <dev@openvz.org> Signed-Off-By: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/fork.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/fork.c b/kernel/fork.c
index 03975d0467f9..3384eb89cb1c 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -725,7 +725,7 @@ out_release:
725 free_fdset (new_fdt->open_fds, new_fdt->max_fdset); 725 free_fdset (new_fdt->open_fds, new_fdt->max_fdset);
726 free_fd_array(new_fdt->fd, new_fdt->max_fds); 726 free_fd_array(new_fdt->fd, new_fdt->max_fds);
727 kmem_cache_free(files_cachep, newf); 727 kmem_cache_free(files_cachep, newf);
728 goto out; 728 return NULL;
729} 729}
730 730
731static int copy_files(unsigned long clone_flags, struct task_struct * tsk) 731static int copy_files(unsigned long clone_flags, struct task_struct * tsk)