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| author | Bill Kuzeja <William.Kuzeja@stratus.com> | 2019-03-04 14:25:46 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2019-03-07 01:26:45 +0100 |
| commit | db0f166e9a37215b15d5d732c98fa15219adccf0 (patch) | |
| tree | e95bcbcb6ce35df0b8f61cbb6f62ea8f1f0de979 /drivers/scsi | |
| parent | scsi: megaraid_sas: reduce module load time (diff) | |
| download | linux-db0f166e9a37215b15d5d732c98fa15219adccf0.tar.xz linux-db0f166e9a37215b15d5d732c98fa15219adccf0.zip | |
scsi: qla2xxx: Fix panic in qla_dfs_tgt_counters_show
When trying to display tgt_counters in the debugfs, a panic can result.
There is no null check for qpair after it is assigned in the for-loop.
Unless vha->hw->queue_pair_map array is completely filled with entries, the
system will panic dereferencing a null pointer.
Signed-off-by: Bill Kuzeja <william.kuzeja@stratus.com>
Acked-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_dfs.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/scsi/qla2xxx/qla_dfs.c b/drivers/scsi/qla2xxx/qla_dfs.c index ead17288e2a7..5819a45ac5ef 100644 --- a/drivers/scsi/qla2xxx/qla_dfs.c +++ b/drivers/scsi/qla2xxx/qla_dfs.c @@ -193,6 +193,8 @@ qla_dfs_tgt_counters_show(struct seq_file *s, void *unused) for (i = 0; i < vha->hw->max_qpairs; i++) { qpair = vha->hw->queue_pair_map[i]; + if (!qpair) + continue; qla_core_sbt_cmd += qpair->tgt_counters.qla_core_sbt_cmd; core_qla_que_buf += qpair->tgt_counters.core_qla_que_buf; qla_core_ret_ctio += qpair->tgt_counters.qla_core_ret_ctio; |