From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vaughan Cao Subject: [PATCH v6 0/4][SCSI] sg: fix race condition in sg_open Date: Wed, 28 Aug 2013 18:07:48 +0800 Message-ID: <1377684472-7815-1-git-send-email-vaughan.cao@oracle.com> References: <1377662419.2005.12.camel@dabdike> Return-path: In-Reply-To: <1377662419.2005.12.camel@dabdike> Sender: linux-kernel-owner@vger.kernel.org To: James.Bottomley@HansenPartnership.com Cc: joern@logfs.org, vaughan.cao@oracle.com, dgilbert@interlog.com, JBottomley@parallels.com, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org List-Id: linux-scsi@vger.kernel.org There is a race when open sg with O_EXCL flag. Also a race may happen between sg_open and sg_remove. 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 | 173 +++++++++++++++++++++++++----------------------------- 1 file changed, 80 insertions(+), 93 deletions(-) -- 1.8.3.1