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authorOleg Nesterov <oleg@redhat.com>2009-09-23 15:56:59 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-24 07:21:01 -0700
commit964ee7df90d799e38fb1556c57cd5c45fc736436 (patch)
tree58ae7325f80394cb86409d5876c710376dde8e1a /include/linux/timer.h
parent61be228a06dc6e8662f30e89eda3c12083c1f379 (diff)
exec: fix set_binfmt() vs sys_delete_module() race
sys_delete_module() can set MODULE_STATE_GOING after search_binary_handler() does try_module_get(). In this case set_binfmt()->try_module_get() fails but since none of the callers check the returned error, the task will run with the wrong old ->binfmt. The proper fix should change all ->load_binary() methods, but we can rely on fact that the caller must hold a reference to binfmt->module and use __module_get() which never fails. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Cc: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/timer.h')
0 files changed, 0 insertions, 0 deletions