* [GIT pull] core fix for 4.11
@ 2017-04-02 7:20 Thomas Gleixner
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From: Thomas Gleixner @ 2017-04-02 7:20 UTC (permalink / raw)
To: Linus Torvalds; +Cc: LKML, Andrew Morton, Ingo Molnar, H. Peter Anvin
Linus,
please pull the latest core-urgent-for-linus git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git core-urgent-for-linus
Prevent leaking kernel memory via /proc/$pid/syscall when the queried task
is not in a syscall.
Thanks,
tglx
------------------>
Kees Cook (1):
lib/syscall: Clear return values when no stack
lib/syscall.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/lib/syscall.c b/lib/syscall.c
index 17d5ff5fa6a3..2c6cd1b5c3ea 100644
--- a/lib/syscall.c
+++ b/lib/syscall.c
@@ -12,6 +12,7 @@ static int collect_syscall(struct task_struct *target, long *callno,
if (!try_get_task_stack(target)) {
/* Task has no stack, so the task isn't in a syscall. */
+ *sp = *pc = 0;
*callno = -1;
return 0;
}
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2017-04-02 7:20 [GIT pull] core fix for 4.11 Thomas Gleixner
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