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| author | Roland Dreier <roland@purestorage.com> | 2012-06-11 18:31:31 -0700 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2012-06-12 20:15:49 -0700 |
| commit | d4f75b567bb63b51e5ecd42af1e82d5aed5100dd (patch) | |
| tree | 258490017b2aa269022cac58ff0c80ab329a2e3a /drivers/scsi | |
| parent | 9389c3c943da7e5f903eebf79d596601537afe01 (diff) | |
| download | blackbird-op-linux-d4f75b567bb63b51e5ecd42af1e82d5aed5100dd.tar.gz blackbird-op-linux-d4f75b567bb63b51e5ecd42af1e82d5aed5100dd.zip | |
tcm_qla2xxx: Handle malformed wwn strings properly
If we make a variable an unsigned int and then expect it to be < 0 on
a bad character, we're going to have a bad time. Fix the tcm_qla2xxx
code to actually notice if hex_to_bin() returns a negative variable.
This was detected by the compiler warning:
scsi/qla2xxx/tcm_qla2xxx.c: In function ‘tcm_qla2xxx_npiv_extract_wwn’:
scsi/qla2xxx/tcm_qla2xxx.c:148:3: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits]
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/qla2xxx/tcm_qla2xxx.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/scsi/qla2xxx/tcm_qla2xxx.c b/drivers/scsi/qla2xxx/tcm_qla2xxx.c index 2f12c0921334..6e64314dbbb3 100644 --- a/drivers/scsi/qla2xxx/tcm_qla2xxx.c +++ b/drivers/scsi/qla2xxx/tcm_qla2xxx.c @@ -137,13 +137,15 @@ static char *tcm_qla2xxx_get_fabric_name(void) */ static int tcm_qla2xxx_npiv_extract_wwn(const char *ns, u64 *nm) { - unsigned int i, j, value; + unsigned int i, j; u8 wwn[8]; memset(wwn, 0, sizeof(wwn)); /* Validate and store the new name */ for (i = 0, j = 0; i < 16; i++) { + int value; + value = hex_to_bin(*ns++); if (value >= 0) j = (j << 4) | value; |
