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dm-ebs: fix incorrect device offset check in ebs_ctr()

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<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: d3c7b35c20 ("dm: add emulated block size target")
Signed-off-by: Genjian Zhang <zhanggenjian@kylinos.cn>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
This commit is contained in:
Genjian Zhang 2026-08-07 23:57:15 +08:00 committed by Mikulas Patocka
parent 7d4d4f3b66
commit 7ac81e2d22
1 changed files with 1 additions and 2 deletions
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3
drivers/md/dm-ebs-target.c
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@ -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;
}