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Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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Pull core fix from Thomas Gleixner:
 "Prevent leaking kernel memory via /proc/$pid/syscall when the queried
  task is not in a syscall"

* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  lib/syscall: Clear return values when no stack
This commit is contained in:
Linus Torvalds 2017-04-02 09:18:59 -07:00
commit ada63c6159
1 changed files with 1 additions and 0 deletions
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lib/syscall.c
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@ -12,6 +12,7 @@ static int collect_syscall(struct task_struct *target, long *callno,
if (!try_get_task_stack(target)) { if (!try_get_task_stack(target)) {
/* Task has no stack, so the task isn't in a syscall. */ /* Task has no stack, so the task isn't in a syscall. */
*sp = *pc = 0;
*callno = -1; *callno = -1;
return 0; return 0;
} }