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| author |   Takashi Iwai <tiwai@suse.de> | 2020-03-15 10:42:34 +0100 |
|---|---|---|
| committer |   Martin K. Petersen <martin.petersen@oracle.com> | 2020-03-17 13:36:09 -0400 |
| commit | 82893ced87414f255977a9132db8f667ee01882b (patch) | |
| tree | cea44015b3bc8652e74b9d6f34b188260cf534b5 /drivers/scsi/aacraid/linit.c | |
| parent | scsi: zfcp: log FC Endpoint Security errors (diff) | |
| download | linux-dev-82893ced87414f255977a9132db8f667ee01882b.tar.xz linux-dev-82893ced87414f255977a9132db8f667ee01882b.zip | |
scsi: aacraid: Use scnprintf() for avoiding potential buffer overflow
Since snprintf() returns the would-be-output size instead of the actual
output size, the succeeding calls may go beyond the given buffer limit.
Fix it by replacing with scnprintf().
Link: https://lore.kernel.org/r/20200315094241.9086-2-tiwai@suse.de
Cc: "James E . J . Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K . Petersen" <martin.petersen@oracle.com>
Cc: Adaptec OEM Raid Solutions <aacraid@microsemi.com>
Cc: linux-scsi@vger.kernel.org
Acked-by: Balsundar P <Balsundar.P@microchip.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/aacraid/linit.c')
| -rw-r--r-- | drivers/scsi/aacraid/linit.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c index b1d133de29ab..8b583eec25b5 100644 --- a/drivers/scsi/aacraid/linit.c +++ b/drivers/scsi/aacraid/linit.c @@ -1287,20 +1287,21 @@ static ssize_t aac_show_flags(struct device *cdev, if (nblank(dprintk(x))) len = snprintf(buf, PAGE_SIZE, "dprintk\n"); #ifdef AAC_DETAILED_STATUS_INFO - len += snprintf(buf + len, PAGE_SIZE - len, - "AAC_DETAILED_STATUS_INFO\n"); + len += scnprintf(buf + len, PAGE_SIZE - len, + "AAC_DETAILED_STATUS_INFO\n"); #endif if (dev->raw_io_interface && dev->raw_io_64) - len += snprintf(buf + len, PAGE_SIZE - len, - "SAI_READ_CAPACITY_16\n"); + len += scnprintf(buf + len, PAGE_SIZE - len, + "SAI_READ_CAPACITY_16\n"); if (dev->jbod) - len += snprintf(buf + len, PAGE_SIZE - len, "SUPPORTED_JBOD\n"); + len += scnprintf(buf + len, PAGE_SIZE - len, + "SUPPORTED_JBOD\n"); if (dev->supplement_adapter_info.supported_options2 & AAC_OPTION_POWER_MANAGEMENT) - len += snprintf(buf + len, PAGE_SIZE - len, - "SUPPORTED_POWER_MANAGEMENT\n"); + len += scnprintf(buf + len, PAGE_SIZE - len, + "SUPPORTED_POWER_MANAGEMENT\n"); if (dev->msi) - len += snprintf(buf + len, PAGE_SIZE - len, "PCI_HAS_MSI\n"); + len += scnprintf(buf + len, PAGE_SIZE - len, "PCI_HAS_MSI\n"); return len; } |