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| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2013-12-11 15:45:32 -0800 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2013-12-19 00:18:25 -0800 |
| commit | db6077fd0b7dd41dc6ff18329cec979379071f87 (patch) | |
| tree | 7491659574ec90fa70a41fa3401aadc8ab55e3cb /drivers/target/iscsi/iscsi_target.c | |
| parent | 63832aabec12a28a41a221773ab3819d30ba0a67 (diff) | |
| download | linux-stable-db6077fd0b7dd41dc6ff18329cec979379071f87.tar.gz linux-stable-db6077fd0b7dd41dc6ff18329cec979379071f87.tar.bz2 linux-stable-db6077fd0b7dd41dc6ff18329cec979379071f87.zip | |
iscsi-target: Fix incorrect np->np_thread NULL assignment
When shutting down a target there is a race condition between
iscsit_del_np() and __iscsi_target_login_thread().
The latter sets the thread pointer to NULL, and the former
tries to issue kthread_stop() on that pointer without any
synchronization.
This patch moves the np->np_thread NULL assignment into
iscsit_del_np(), after kthread_stop() has completed. It also
removes the signal_pending() + np_state check, and only
exits when kthread_should_stop() is true.
Reported-by: Hannes Reinecke <hare@suse.de>
Cc: <stable@vger.kernel.org> #3.12+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target/iscsi/iscsi_target.c')
| -rw-r--r-- | drivers/target/iscsi/iscsi_target.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index 02182ab017b1..00867190413c 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -465,6 +465,7 @@ int iscsit_del_np(struct iscsi_np *np) */ send_sig(SIGINT, np->np_thread, 1); kthread_stop(np->np_thread); + np->np_thread = NULL; } np->np_transport->iscsit_free_np(np); |