diff options
| author | Mark Rustad <mark.d.rustad@intel.com> | 2012-07-13 18:18:04 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-07-29 08:04:18 -0700 |
| commit | 8db5153f9dca89afbeebe0b077e7cc1e5827e07a (patch) | |
| tree | f82d65c99c59f3855e91678d790603f085429920 /drivers/target | |
| parent | fd25080998d00a94a87bf7fc9f843291db7250a6 (diff) | |
tcm_fc: Fix crash seen with aborts and large reads
commit 3cc5d2a6b9a2fd1bf024aa5e52dd22961eecaf13 upstream.
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sequence is no longer valid, it must not be dereferenced.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>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/target')
| -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 a375f257aabc..da90f647695e 100644 --- a/drivers/target/tcm_fc/tfc_cmd.c +++ b/drivers/target/tcm_fc/tfc_cmd.c @@ -240,6 +240,8 @@ 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; } |