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| author | Colin Ian King <colin.king@canonical.com> | 2018-05-31 14:31:17 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-06-08 03:50:00 +0200 |
| commit | e73c864ba3b57cc3c5cc6b328b9da1b48637a6df (patch) | |
| tree | 24c0b66ca701328c70fee6435065e152b34a9cdf /drivers/scsi/aic7xxx | |
| parent | scsi: mpt3sas: Add an I/O barrier (diff) | |
| download | linux-e73c864ba3b57cc3c5cc6b328b9da1b48637a6df.tar.xz linux-e73c864ba3b57cc3c5cc6b328b9da1b48637a6df.zip | |
scsi: aic7xxx: aic79xx: fix potential null pointer dereference on ahd
If AHD_DEBUG is enabled and ahd_platform_alloc fails then ahd is set to
null and the debug printk dereferences ahd when passing it to ahd_name.
Fix this by moving the debug printk to before the call to
ahd_platform_alloc where ahd is not null at that point.
Detected by CoverityScan, CID#100296 ("Explicit null dereference")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/aic7xxx')
| -rw-r--r-- | drivers/scsi/aic7xxx/aic79xx_core.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/scsi/aic7xxx/aic79xx_core.c b/drivers/scsi/aic7xxx/aic79xx_core.c index 034f4eebb160..3efd4cdc40a0 100644 --- a/drivers/scsi/aic7xxx/aic79xx_core.c +++ b/drivers/scsi/aic7xxx/aic79xx_core.c @@ -6112,10 +6112,6 @@ ahd_alloc(void *platform_arg, char *name) ahd->int_coalescing_stop_threshold = AHD_INT_COALESCING_STOP_THRESHOLD_DEFAULT; - if (ahd_platform_alloc(ahd, platform_arg) != 0) { - ahd_free(ahd); - ahd = NULL; - } #ifdef AHD_DEBUG if ((ahd_debug & AHD_SHOW_MEMORY) != 0) { printk("%s: scb size = 0x%x, hscb size = 0x%x\n", @@ -6123,6 +6119,10 @@ ahd_alloc(void *platform_arg, char *name) (u_int)sizeof(struct hardware_scb)); } #endif + if (ahd_platform_alloc(ahd, platform_arg) != 0) { + ahd_free(ahd); + ahd = NULL; + } return (ahd); } |