diff options
| author | Tong Zhang <ztong0001@gmail.com> | 2022-01-23 14:57:17 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-02-16 12:52:49 +0100 |
| commit | 5c5ceea00c8c9df150708e66cb9f2891192c1162 (patch) | |
| tree | 2f794a379c2ee1adb6a0f4e6dbb10c6715b26ce7 /drivers/scsi | |
| parent | 7cc32ff0cd6c44a3c26de5faecfe8b5546198fad (diff) | |
scsi: myrs: Fix crash in error case
[ Upstream commit 4db09593af0b0b4d7d4805ebb3273df51d7cc30d ]
In myrs_detect(), cs->disable_intr is NULL when privdata->hw_init() fails
with non-zero. In this case, myrs_cleanup(cs) will call a NULL ptr and
crash the kernel.
[ 1.105606] myrs 0000:00:03.0: Unknown Initialization Error 5A
[ 1.105872] myrs 0000:00:03.0: Failed to initialize Controller
[ 1.106082] BUG: kernel NULL pointer dereference, address: 0000000000000000
[ 1.110774] Call Trace:
[ 1.110950] myrs_cleanup+0xe4/0x150 [myrs]
[ 1.111135] myrs_probe.cold+0x91/0x56a [myrs]
[ 1.111302] ? DAC960_GEM_intr_handler+0x1f0/0x1f0 [myrs]
[ 1.111500] local_pci_probe+0x48/0x90
Link: https://lore.kernel.org/r/20220123225717.1069538-1-ztong0001@gmail.com
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Tong Zhang <ztong0001@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/myrs.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/scsi/myrs.c b/drivers/scsi/myrs.c index cfc3f8b4174a..2d3d14aa46b4 100644 --- a/drivers/scsi/myrs.c +++ b/drivers/scsi/myrs.c @@ -2272,7 +2272,8 @@ static void myrs_cleanup(struct myrs_hba *cs) myrs_unmap(cs); if (cs->mmio_base) { - cs->disable_intr(cs); + if (cs->disable_intr) + cs->disable_intr(cs); iounmap(cs->mmio_base); cs->mmio_base = NULL; } |