diff options
| author | Mark Rustad <mark.d.rustad@intel.com> | 2012-07-13 18:18:04 -0700 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2012-07-14 15:17:29 -0700 |
| commit | 3cc5d2a6b9a2fd1bf024aa5e52dd22961eecaf13 (patch) | |
| tree | bd6f7671abd342573227645906031719978e71ef | |
| parent | 4f1d0f1971ba37010603a3a5c763f398b888d2f4 (diff) | |
| download | mm-3cc5d2a6b9a2fd1bf024aa5e52dd22961eecaf13.tar.gz | |
tcm_fc: Fix crash seen with aborts and large reads
This patch fixes a crash seen when large reads have their exchange
aborted by either timing out or being reset. Because the exchange
abort results in the seq pointer being set to NULL, because the
sequence is no longer valid, it must not be dereferenced. This
patch changes the function ft_get_task_tag to return ~0 if it is
unable to get the tag for this reason. Because the get_task_tag
interface provides no means of returning an error, this seems
like the best way to fix this issue at the moment.
Signed-off-by: Mark Rustad <mark.d.rustad@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| -rw-r--r-- | drivers/target/tcm_fc/tfc_cmd.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/target/tcm_fc/tfc_cmd.c b/drivers/target/tcm_fc/tfc_cmd.c index f03fb9730f5bb..5b65f33939a84 100644 --- a/drivers/target/tcm_fc/tfc_cmd.c +++ b/drivers/target/tcm_fc/tfc_cmd.c @@ -230,6 +230,8 @@ u32 ft_get_task_tag(struct se_cmd *se_cmd) { struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd); + if (cmd->aborted) + return ~0; return fc_seq_exch(cmd->seq)->rxid; } |