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authorMike Christie <michaelc@cs.wisc.edu>2009-03-05 14:46:07 -0600
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2009-03-13 15:29:54 -0500
commit728996829b3e2a3bbacb7390e6c040dd839cdf21 (patch)
treee2e0b41faa980aeb78c0cd407dec26c73a8c7514 /drivers/scsi/libiscsi.c
parent5e7facb77ff4b6961d936773fb1f175f7abf76b7 (diff)
[SCSI] libiscsi: fix possbile null ptr session command cleanup
If the iscsi eh fires when the current task is a nop, then the task->sc pointer is null. fail_all_commands could then try to do task->sc->device and oops. We actually do not need to access the curr task in this path, because if it is a cmd task the fail_command call will handle this and if it is mgmt task then the flush of the mgmt queues will handle that. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/libiscsi.c')
-rw-r--r--drivers/scsi/libiscsi.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index d0701791113..dfaa8adf099 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -1603,8 +1603,11 @@ static void fail_all_commands(struct iscsi_conn *conn, unsigned lun,
{
struct iscsi_task *task, *tmp;
- if (conn->task && (conn->task->sc->device->lun == lun || lun == -1))
- conn->task = NULL;
+ if (conn->task) {
+ if (lun == -1 ||
+ (conn->task->sc && conn->task->sc->device->lun == lun))
+ conn->task = NULL;
+ }
/* flush pending */
list_for_each_entry_safe(task, tmp, &conn->xmitqueue, running) {