diff options
| author | Genjian Zhang <zhanggenjian@kylinos.cn> | 2026-08-07 23:57:15 +0800 |
|---|---|---|
| committer | Mikulas Patocka <mpatocka@redhat.com> | 2026-09-02 17:01:13 +0200 |
| commit | 7ac81e2d2240f2c57bd073b0733e0b2abca38e82 (patch) | |
| tree | f8becdfebbfa1c31fe32742c3b88a283b98911a5 | |
| parent | 7d4d4f3b668d708d94f62ecdd33ac330a6fd8a84 (diff) | |
dm-ebs: fix incorrect device offset check in ebs_ctr()
<offset> is a backing-device sector offset; ti->len is the virtual
target length. Comparing them rejects valid tables, e.g.:
dmsetup create ebs0 --table "0 1048576 ebs /dev/sda 2097152 1 8"
-> ebs: Invalid device offset sector (-EINVAL)
Drop the check. Bounds against the backing device are already
enforced later by device_area_is_invalid() via ebs_iterate_devices().
Cc: stable@vger.kernel.org
Fixes: d3c7b35c20d6 ("dm: add emulated block size target")
Signed-off-by: Genjian Zhang <zhanggenjian@kylinos.cn>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
| -rw-r--r-- | drivers/md/dm-ebs-target.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/md/dm-ebs-target.c b/drivers/md/dm-ebs-target.c index 1e52bde48b91..5d67c6c19d4b 100644 --- a/drivers/md/dm-ebs-target.c +++ b/drivers/md/dm-ebs-target.c @@ -265,8 +265,7 @@ static int ebs_ctr(struct dm_target *ti, unsigned int argc, char **argv) r = -EINVAL; if (sscanf(argv[1], "%llu%c", &tmp, &dummy) != 1 || - tmp != (sector_t)tmp || - (sector_t)tmp >= ti->len) { + tmp != (sector_t)tmp) { ti->error = "Invalid device offset sector"; goto bad; } |