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authorLinus Torvalds <torvalds@linux-foundation.org>2020-01-18 12:29:13 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2020-01-18 12:29:13 -0800
commitba0f47220384ff160c9df93dedbbef26d7b67f7b (patch)
tree7f389bd934db9b463529fbb6b3970927db64fb1e /include
parent8cac89909a30807eb4aba56a0e29f55e3b6df42f (diff)
parent463f550fb47bede3a5d7d5177f363a6c3b45d50b (diff)
Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull rseq fixes from Ingo Molnar: "Two rseq bugfixes: - CLONE_VM !CLONE_THREAD didn't work properly, the kernel would end up corrupting the TLS of the parent. Technically a change in the ABI but the previous behavior couldn't resonably have been relied on by applications so this looks like a valid exception to the ABI rule. - Make the RSEQ_FLAG_UNREGISTER ABI behavior consistent with the handling of other flags. This is not thought to impact any applications either" * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: rseq: Unregister rseq for clone CLONE_VM rseq: Reject unknown flags on rseq unregister
Diffstat (limited to 'include')
-rw-r--r--include/linux/sched.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 467d26046416..716ad1d8d95e 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1929,11 +1929,11 @@ static inline void rseq_migrate(struct task_struct *t)
/*
* If parent process has a registered restartable sequences area, the
- * child inherits. Only applies when forking a process, not a thread.
+ * child inherits. Unregister rseq for a clone with CLONE_VM set.
*/
static inline void rseq_fork(struct task_struct *t, unsigned long clone_flags)
{
- if (clone_flags & CLONE_THREAD) {
+ if (clone_flags & CLONE_VM) {
t->rseq = NULL;
t->rseq_sig = 0;
t->rseq_event_mask = 0;