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authorTakashi Iwai <tiwai@suse.de>2020-03-15 12:42:34 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2020-03-17 20:36:09 +0300
commit82893ced87414f255977a9132db8f667ee01882b (patch)
treecea44015b3bc8652e74b9d6f34b188260cf534b5 /drivers/scsi/aacraid
parent42cabdaf103be174adb6f1ca61383eb2b35a013a (diff)
downloadlinux-82893ced87414f255977a9132db8f667ee01882b.tar.xz
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')
-rw-r--r--drivers/scsi/aacraid/linit.c17
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;
}