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| author | Oleg Nesterov <oleg@redhat.com> | 2017-11-17 15:30:04 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-01-17 09:29:27 +0100 |
| commit | 64c64936d42b910a4f3f74f00f420b6fa06792c9 (patch) | |
| tree | 918c777b64a4953088bb538a8e9461b0039fc871 /kernel | |
| parent | 8deeda774d94439a5d33652fda2c2057cfd7322b (diff) | |
| download | linux-stable-64c64936d42b910a4f3f74f00f420b6fa06792c9.tar.gz linux-stable-64c64936d42b910a4f3f74f00f420b6fa06792c9.tar.bz2 linux-stable-64c64936d42b910a4f3f74f00f420b6fa06792c9.zip | |
kernel/signal.c: protect the SIGNAL_UNKILLABLE tasks from !sig_kernel_only() signals
commit ac25385089f673560867eb5179228a44ade0cfc1 upstream.
Change sig_task_ignored() to drop the SIG_DFL && !sig_kernel_only()
signals even if force == T. This simplifies the next change and this
matches the same check in get_signal() which will drop these signals
anyway.
Link: http://lkml.kernel.org/r/20171103184227.GC21036@redhat.com
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Tested-by: Kyle Huey <me@kylehuey.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/signal.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/signal.c b/kernel/signal.c index b956332ded42..63602c815a58 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -72,7 +72,7 @@ static int sig_task_ignored(struct task_struct *t, int sig, bool force) handler = sig_handler(t, sig); if (unlikely(t->signal->flags & SIGNAL_UNKILLABLE) && - handler == SIG_DFL && !force) + handler == SIG_DFL && !(force && sig_kernel_only(sig))) return 1; return sig_handler_ignored(handler, sig); |