There is a race when open sg with O_EXCL flag. Also a race may happen between
sg_open and sg_remove.
Changes from v6:
* [1/4] remove double if.
* [3/4] fix via IS_ERR
Changes from v5:
Patches based on v3.11-rc7 and passed sg_tst_excl test.
* [1/4] * remove unused variables - res,sdp.
* fix insane code dealing with sg_add_sfp.
* [2/4] resolve conflict with v3.11-rc7.
* [3/4] remove sem_out label.
* [4/4] add sdp definition.
Changes from v4:
* [3/4] use ERR_PTR series instead of adding another parameter in sg_add_sfp
* [4/4] fix conflict for cherry-pick from v3.
Changes from v3:
* release o_sem in sg_release(), not in sg_remove_sfp().
* not set exclude with sfd_lock held.
Vaughan Cao (4):
sg: use rwsem to solve race during exclusive open
sg: no need sg_open_exclusive_lock
sg: checking sdp->detached isn't protected when open
sg: push file descriptor list locking down to per-device locking
drivers/scsi/sg.c | 176 +++++++++++++++++++++++++-----------------------------
1 file changed, 81 insertions(+), 95 deletions(-)
--
1.8.3.1
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