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| author | Heinz Mauelshagen <heinzm@redhat.com> | 2018-03-28 17:07:14 +0200 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2018-04-04 12:12:37 -0400 |
| commit | 13bc62d4a6c79b95ec299591df1bae0a505f2d07 (patch) | |
| tree | 0c4bd4c5f41d979435d04268de3e779c31967d75 /drivers/md | |
| parent | d4b1aaf53c02e6440c49aeae06ba3a3a8ce9882a (diff) | |
| download | linux-13bc62d4a6c79b95ec299591df1bae0a505f2d07.tar.bz2 | |
dm raid: fix parse_raid_params() variable range issue
parse_raid_params() compares variable "int value" with INT_MAX.
E.g. related Coverity report excerpt:
CID 1364818 (#2 of 3): Operands don't affect result (CONSTANT_EXPRESSION_RESULT) [select issue]
1433 if (value > INT_MAX) {
Fix by changing checks to avoid INT_MAX.
Whilst on it, avoid unnecessary checks against constants
and add check for sane recovery speed min/max.
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm-raid.c | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c index 598c9e3e41a5..6f823f44b4aa 100644 --- a/drivers/md/dm-raid.c +++ b/drivers/md/dm-raid.c @@ -1370,19 +1370,18 @@ static int parse_raid_params(struct raid_set *rs, struct dm_arg_set *as, * In device-mapper, we specify things in sectors, but * MD records this value in kB */ - value /= 2; - if (value > COUNTER_MAX) { + if (value < 0 || value / 2 > COUNTER_MAX) { rs->ti->error = "Max write-behind limit out of range"; return -EINVAL; } - rs->md.bitmap_info.max_write_behind = value; + rs->md.bitmap_info.max_write_behind = value / 2; } else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_DAEMON_SLEEP))) { if (test_and_set_bit(__CTR_FLAG_DAEMON_SLEEP, &rs->ctr_flags)) { rs->ti->error = "Only one daemon_sleep argument pair allowed"; return -EINVAL; } - if (!value || (value > MAX_SCHEDULE_TIMEOUT)) { + if (value < 0) { rs->ti->error = "daemon sleep period out of range"; return -EINVAL; } @@ -1424,27 +1423,33 @@ static int parse_raid_params(struct raid_set *rs, struct dm_arg_set *as, return -EINVAL; } + if (value < 0) { + rs->ti->error = "Bogus stripe cache entries value"; + return -EINVAL; + } rs->stripe_cache_entries = value; } else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_MIN_RECOVERY_RATE))) { if (test_and_set_bit(__CTR_FLAG_MIN_RECOVERY_RATE, &rs->ctr_flags)) { rs->ti->error = "Only one min_recovery_rate argument pair allowed"; return -EINVAL; } - if (value > INT_MAX) { + + if (value < 0) { rs->ti->error = "min_recovery_rate out of range"; return -EINVAL; } - rs->md.sync_speed_min = (int)value; + rs->md.sync_speed_min = value; } else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_MAX_RECOVERY_RATE))) { if (test_and_set_bit(__CTR_FLAG_MAX_RECOVERY_RATE, &rs->ctr_flags)) { rs->ti->error = "Only one max_recovery_rate argument pair allowed"; return -EINVAL; } - if (value > INT_MAX) { + + if (value < 0) { rs->ti->error = "max_recovery_rate out of range"; return -EINVAL; } - rs->md.sync_speed_max = (int)value; + rs->md.sync_speed_max = value; } else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_REGION_SIZE))) { if (test_and_set_bit(__CTR_FLAG_REGION_SIZE, &rs->ctr_flags)) { rs->ti->error = "Only one region_size argument pair allowed"; @@ -1490,6 +1495,12 @@ static int parse_raid_params(struct raid_set *rs, struct dm_arg_set *as, return -EINVAL; } + if (rs->md.sync_speed_max && + rs->md.sync_speed_min > rs->md.sync_speed_max) { + rs->ti->error = "Bogus recovery rates"; + return -EINVAL; + } + if (validate_region_size(rs, region_size)) return -EINVAL; |