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| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2016-03-05 20:00:12 -0800 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2016-03-22 11:11:11 -0400 |
| commit | a302f98efd169ea0df9ee876b92cebcfcc0a8e4f (patch) | |
| tree | 805a797f8306cf6196cdb5ff1c6d632df2c2bdd3 | |
| parent | a91db6218af2ecc7ae69ec6e40b9f53edb816577 (diff) | |
| download | lwn-a302f98efd169ea0df9ee876b92cebcfcc0a8e4f.tar.gz lwn-a302f98efd169ea0df9ee876b92cebcfcc0a8e4f.zip | |
target: Drop incorrect ABORT_TASK put for completed commands
[ Upstream commit 7f54ab5ff52fb0b91569bc69c4a6bc5cac1b768d ]
This patch fixes a recent ABORT_TASK regression associated
with commit febe562c, where a left-over target_put_sess_cmd()
would still be called when __target_check_io_state() detected
a command has already been completed, and explicit ABORT must
be avoided.
Note commit febe562c dropped the local kref_get_unless_zero()
check in core_tmr_abort_task(), but did not drop this extra
corresponding target_put_sess_cmd() in the failure path.
So go ahead and drop this now bogus target_put_sess_cmd(),
and avoid this potential use-after-free.
Reported-by: Dan Lane <dracodan@gmail.com>
Cc: Quinn Tran <quinn.tran@qlogic.com>
Cc: Himanshu Madhani <himanshu.madhani@qlogic.com>
Cc: Sagi Grimberg <sagig@mellanox.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Andy Grover <agrover@redhat.com>
Cc: Mike Christie <mchristi@redhat.com>
Cc: stable@vger.kernel.org # 3.14+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
| -rw-r--r-- | drivers/target/target_core_tmr.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/target/target_core_tmr.c b/drivers/target/target_core_tmr.c index a5c2b3cf7d1a..05c0a90e11a9 100644 --- a/drivers/target/target_core_tmr.c +++ b/drivers/target/target_core_tmr.c @@ -181,7 +181,6 @@ void core_tmr_abort_task( if (!__target_check_io_state(se_cmd, se_sess, 0)) { spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); - target_put_sess_cmd(se_cmd); goto out; } |