Merge branch 'linus' into stackprotector

Conflicts:
	arch/x86/include/asm/pda.h
	kernel/fork.c

1 files changed, 33 insertions, 26 deletions

diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 655ed8d30a86..c41fa2af7677 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -157,7 +157,7 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec,
         int items;
         elf_addr_t *elf_info;
         int ei_index = 0;
-        struct task_struct *tsk = current;
+        const struct cred *cred = current_cred();
         struct vm_area_struct *vma;
 
         /*
@@ -223,10 +223,10 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec,
         NEW_AUX_ENT(AT_BASE, interp_load_addr);
         NEW_AUX_ENT(AT_FLAGS, 0);
         NEW_AUX_ENT(AT_ENTRY, exec->e_entry);
-        NEW_AUX_ENT(AT_UID, tsk->uid);
-        NEW_AUX_ENT(AT_EUID, tsk->euid);
-        NEW_AUX_ENT(AT_GID, tsk->gid);
-        NEW_AUX_ENT(AT_EGID, tsk->egid);
+        NEW_AUX_ENT(AT_UID, cred->uid);
+        NEW_AUX_ENT(AT_EUID, cred->euid);
+        NEW_AUX_ENT(AT_GID, cred->gid);
+        NEW_AUX_ENT(AT_EGID, cred->egid);
         NEW_AUX_ENT(AT_SECURE, security_bprm_secureexec(bprm));
         NEW_AUX_ENT(AT_EXECFN, bprm->exec);
         if (k_platform) {
@@ -683,7 +683,7 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
                          * switch really is going to happen - do this in
                          * flush_thread().      - akpm
                          */
-                        SET_PERSONALITY(loc->elf_ex, 0);
+                        SET_PERSONALITY(loc->elf_ex);
 
                         interpreter = open_exec(elf_interpreter);
                         retval = PTR_ERR(interpreter);
@@ -734,7 +734,7 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
                         goto out_free_dentry;
         } else {
                 /* Executables without an interpreter also need a personality  */
-                SET_PERSONALITY(loc->elf_ex, 0);
+                SET_PERSONALITY(loc->elf_ex);
         }
 
         /* Flush all traces of the currently running executable */
@@ -748,7 +748,7 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
 
         /* Do this immediately, since STACK_TOP as used in setup_arg_pages
            may depend on the personality.  */
-        SET_PERSONALITY(loc->elf_ex, 0);
+        SET_PERSONALITY(loc->elf_ex);
         if (elf_read_implies_exec(loc->elf_ex, executable_stack))
                 current->personality |= READ_IMPLIES_EXEC;
 
@@ -949,14 +949,14 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
         set_binfmt(&elf_format);
 
 #ifdef ARCH_HAS_SETUP_ADDITIONAL_PAGES
-        retval = arch_setup_additional_pages(bprm, executable_stack);
+        retval = arch_setup_additional_pages(bprm, !!elf_interpreter);
         if (retval < 0) {
                 send_sig(SIGKILL, current, 0);
                 goto out;
         }
 #endif /* ARCH_HAS_SETUP_ADDITIONAL_PAGES */
 
-        compute_creds(bprm);
+        install_exec_creds(bprm);
         current->flags &= ~PF_FORKNOEXEC;
         retval = create_elf_tables(bprm, &loc->elf_ex,
                           load_addr, interp_load_addr);
@@ -1156,16 +1156,24 @@ static int dump_seek(struct file *file, loff_t off)
 static unsigned long vma_dump_size(struct vm_area_struct *vma,
                                    unsigned long mm_flags)
 {
+#define FILTER(type)    (mm_flags & (1UL << MMF_DUMP_##type))
+
         /* The vma can be set up to tell us the answer directly.  */
         if (vma->vm_flags & VM_ALWAYSDUMP)
                 goto whole;
 
+        /* Hugetlb memory check */
+        if (vma->vm_flags & VM_HUGETLB) {
+                if ((vma->vm_flags & VM_SHARED) && FILTER(HUGETLB_SHARED))
+                        goto whole;
+                if (!(vma->vm_flags & VM_SHARED) && FILTER(HUGETLB_PRIVATE))
+                        goto whole;
+        }
+
         /* Do not dump I/O mapped devices or special mappings */
         if (vma->vm_flags & (VM_IO | VM_RESERVED))
                 return 0;
 
-#define FILTER(type)    (mm_flags & (1UL << MMF_DUMP_##type))
-
         /* By default, dump shared memory if mapped from an anonymous file. */
         if (vma->vm_flags & VM_SHARED) {
                 if (vma->vm_file->f_path.dentry->d_inode->i_nlink == 0 ?
@@ -1333,20 +1341,15 @@ static void fill_prstatus(struct elf_prstatus *prstatus,
         prstatus->pr_pgrp = task_pgrp_vnr(p);
         prstatus->pr_sid = task_session_vnr(p);
         if (thread_group_leader(p)) {
+                struct task_cputime cputime;
+
                 /*
-                 * This is the record for the group leader.  Add in the
-                 * cumulative times of previous dead threads.  This total
-                 * won't include the time of each live thread whose state
-                 * is included in the core dump.  The final total reported
-                 * to our parent process when it calls wait4 will include
-                 * those sums as well as the little bit more time it takes
-                 * this and each other thread to finish dying after the
-                 * core dump synchronization phase.
+                 * This is the record for the group leader.  It shows the
+                 * group-wide total, not its individual thread total.
                  */
-                cputime_to_timeval(cputime_add(p->utime, p->signal->utime),
-                                   &prstatus->pr_utime);
-                cputime_to_timeval(cputime_add(p->stime, p->signal->stime),
-                                   &prstatus->pr_stime);
+                thread_group_cputime(p, &cputime);
+                cputime_to_timeval(cputime.utime, &prstatus->pr_utime);
+                cputime_to_timeval(cputime.stime, &prstatus->pr_stime);
         } else {
                 cputime_to_timeval(p->utime, &prstatus->pr_utime);
                 cputime_to_timeval(p->stime, &prstatus->pr_stime);
@@ -1358,6 +1361,7 @@ static void fill_prstatus(struct elf_prstatus *prstatus,
 static int fill_psinfo(struct elf_prpsinfo *psinfo, struct task_struct *p,
                        struct mm_struct *mm)
 {
+        const struct cred *cred;
         unsigned int i, len;
         
         /* first copy the parameters from user space */
@@ -1385,8 +1389,11 @@ static int fill_psinfo(struct elf_prpsinfo *psinfo, struct task_struct *p,
         psinfo->pr_zomb = psinfo->pr_sname == 'Z';
         psinfo->pr_nice = task_nice(p);
         psinfo->pr_flag = p->flags;
-        SET_UID(psinfo->pr_uid, p->uid);
-        SET_GID(psinfo->pr_gid, p->gid);
+        rcu_read_lock();
+        cred = __task_cred(p);
+        SET_UID(psinfo->pr_uid, cred->uid);
+        SET_GID(psinfo->pr_gid, cred->gid);
+        rcu_read_unlock();
         strncpy(psinfo->pr_fname, p->comm, sizeof(psinfo->pr_fname));
         
         return 0;