diff options
| author | Tong Zhang <ztong0001@gmail.com> | 2022-01-23 23:57:17 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2022-01-25 06:09:41 +0100 |
| commit | 4db09593af0b0b4d7d4805ebb3273df51d7cc30d (patch) | |
| tree | 6fdd50032e248bd82d83d74e9c6fb20225d17d0d /drivers/scsi/myrs.c | |
| parent | scsi: 53c700: Remove redundant assignment to pointer SCp (diff) | |
| download | linux-4db09593af0b0b4d7d4805ebb3273df51d7cc30d.tar.xz linux-4db09593af0b0b4d7d4805ebb3273df51d7cc30d.zip | |
scsi: myrs: Fix crash in error case
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>
Diffstat (limited to 'drivers/scsi/myrs.c')
| -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 253ceca54a84..7eb8c39da366 100644 --- a/drivers/scsi/myrs.c +++ b/drivers/scsi/myrs.c @@ -2267,7 +2267,8 @@ 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; } |