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| author | Javed Hasan <jhasan@marvell.com> | 2021-05-12 09:25:33 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2021-05-15 04:55:17 +0200 |
| commit | 73578af92a0fae6609b955fcc9113e50e413c80f (patch) | |
| tree | 66e1ca6a5b4d7c77ef8e9c33a09e0d97f43c148e /sound/x86 | |
| parent | scsi: ufs: core: Increase the usable queue depth (diff) | |
| download | linux-73578af92a0fae6609b955fcc9113e50e413c80f.tar.xz linux-73578af92a0fae6609b955fcc9113e50e413c80f.zip | |
scsi: qedf: Add pointer checks in qedf_update_link_speed()
The following trace was observed:
[ 14.042059] Call Trace:
[ 14.042061] <IRQ>
[ 14.042068] qedf_link_update+0x144/0x1f0 [qedf]
[ 14.042117] qed_link_update+0x5c/0x80 [qed]
[ 14.042135] qed_mcp_handle_link_change+0x2d2/0x410 [qed]
[ 14.042155] ? qed_set_ptt+0x70/0x80 [qed]
[ 14.042170] ? qed_set_ptt+0x70/0x80 [qed]
[ 14.042186] ? qed_rd+0x13/0x40 [qed]
[ 14.042205] qed_mcp_handle_events+0x437/0x690 [qed]
[ 14.042221] ? qed_set_ptt+0x70/0x80 [qed]
[ 14.042239] qed_int_sp_dpc+0x3a6/0x3e0 [qed]
[ 14.042245] tasklet_action_common.isra.14+0x5a/0x100
[ 14.042250] __do_softirq+0xe4/0x2f8
[ 14.042253] irq_exit+0xf7/0x100
[ 14.042255] do_IRQ+0x7f/0xd0
[ 14.042257] common_interrupt+0xf/0xf
[ 14.042259] </IRQ>
API qedf_link_update() is getting called from QED but by that time
shost_data is not initialised. This results in a NULL pointer dereference
when we try to dereference shost_data while updating supported_speeds.
Add a NULL pointer check before dereferencing shost_data.
Link: https://lore.kernel.org/r/20210512072533.23618-1-jhasan@marvell.com
Fixes: 61d8658b4a43 ("scsi: qedf: Add QLogic FastLinQ offload FCoE driver framework.")
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Javed Hasan <jhasan@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'sound/x86')
0 files changed, 0 insertions, 0 deletions