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authorGuenter Roeck <linux@roeck-us.net>2014-08-10 20:50:30 -0700
committerKees Cook <keescook@chromium.org>2014-08-11 13:29:12 -0700
commit69f6a34bdeea4fec50bb90619bc9602973119572 (patch)
tree8fb595069ac3490438244ca28076b7c1837f93d8 /kernel/fork.c
parentc8d6637d0497d62093dbba0694c7b3a80b79bfe1 (diff)
downloadlinux-69f6a34bdeea4fec50bb90619bc9602973119572.tar.bz2
seccomp: Replace BUG(!spin_is_locked()) with assert_spin_lock
Current upstream kernel hangs with mips and powerpc targets in uniprocessor mode if SECCOMP is configured. Bisect points to commit dbd952127d11 ("seccomp: introduce writer locking"). Turns out that code such as BUG_ON(!spin_is_locked(&list_lock)); can not be used in uniprocessor mode because spin_is_locked() always returns false in this configuration, and that assert_spin_locked() exists for that very purpose and must be used instead. Fixes: dbd952127d11 ("seccomp: introduce writer locking") Cc: Kees Cook <keescook@chromium.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'kernel/fork.c')
-rw-r--r--kernel/fork.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/fork.c b/kernel/fork.c
index 1380d8ace334..0cf9cdb6e491 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1105,7 +1105,7 @@ static void copy_seccomp(struct task_struct *p)
* needed because this new task is not yet running and cannot
* be racing exec.
*/
- BUG_ON(!spin_is_locked(&current->sighand->siglock));
+ assert_spin_locked(&current->sighand->siglock);
/* Ref-count the new filter user, and assign it. */
get_seccomp_filter(current);