Searched hist:b68cf25fe65a9e79ed0bd1b34129fcd245d087d0 (Results 1 – 3 of 3) sorted by relevance
| /freebsd/sys/kern/ |
| H A D | uipc_sem.c | diff b68cf25fe65a9e79ed0bd1b34129fcd245d087d0 Sun Apr 07 17:26:09 CEST 2013 Jilles Tjoelker <jilles@FreeBSD.org> mqueue,ksem,shm: Fix race condition with setting UF_EXCLOSE.
POSIX mqueue, compatibility ksem and POSIX shm create a file descriptor that
has close-on-exec set. However, they do this incorrectly, leaving a window
where a thread may fork and exec while the flag has not been set yet. The
race is easily reproduced on a multicore system with one thread doing
shm_open and close and another thread doing posix_spawnp and waitpid.
Set UF_EXCLOSE via falloc()'s flags argument instead. This also simplifies
the code.
MFC after: 1 week
|
| H A D | uipc_mqueue.c | diff b68cf25fe65a9e79ed0bd1b34129fcd245d087d0 Sun Apr 07 17:26:09 CEST 2013 Jilles Tjoelker <jilles@FreeBSD.org> mqueue,ksem,shm: Fix race condition with setting UF_EXCLOSE.
POSIX mqueue, compatibility ksem and POSIX shm create a file descriptor that
has close-on-exec set. However, they do this incorrectly, leaving a window
where a thread may fork and exec while the flag has not been set yet. The
race is easily reproduced on a multicore system with one thread doing
shm_open and close and another thread doing posix_spawnp and waitpid.
Set UF_EXCLOSE via falloc()'s flags argument instead. This also simplifies
the code.
MFC after: 1 week
|
| H A D | uipc_shm.c | diff b68cf25fe65a9e79ed0bd1b34129fcd245d087d0 Sun Apr 07 17:26:09 CEST 2013 Jilles Tjoelker <jilles@FreeBSD.org> mqueue,ksem,shm: Fix race condition with setting UF_EXCLOSE.
POSIX mqueue, compatibility ksem and POSIX shm create a file descriptor that
has close-on-exec set. However, they do this incorrectly, leaving a window
where a thread may fork and exec while the flag has not been set yet. The
race is easily reproduced on a multicore system with one thread doing
shm_open and close and another thread doing posix_spawnp and waitpid.
Set UF_EXCLOSE via falloc()'s flags argument instead. This also simplifies
the code.
MFC after: 1 week
|