diff options
| author | Richard Weinberger <richard@nod.at> | 2024-01-24 09:37:02 +0300 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2024-02-25 23:19:42 +0300 |
| commit | 68a24aba7c593eafa8fd00f2f76407b9b32b47a9 (patch) | |
| tree | 37b2fac8deaa8c61958a421e6f9a270f676fc5c0 /drivers/mtd/ubi | |
| parent | eb54235315f4577b035c89a10ca3eb48caab0445 (diff) | |
| download | linux-68a24aba7c593eafa8fd00f2f76407b9b32b47a9.tar.xz | |
ubi: Check for too small LEB size in VTBL code
If the LEB size is smaller than a volume table record we cannot
have volumes.
In this case abort attaching.
Cc: Chenyuan Yang <cy54@illinois.edu>
Cc: stable@vger.kernel.org
Fixes: 801c135ce73d ("UBI: Unsorted Block Images")
Reported-by: Chenyuan Yang <cy54@illinois.edu>
Closes: https://lore.kernel.org/linux-mtd/1433EB7A-FC89-47D6-8F47-23BE41B263B3@illinois.edu/
Signed-off-by: Richard Weinberger <richard@nod.at>
Reviewed-by: Zhihao Cheng <chengzhihao1@huawei.com>
Diffstat (limited to 'drivers/mtd/ubi')
| -rw-r--r-- | drivers/mtd/ubi/vtbl.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/mtd/ubi/vtbl.c b/drivers/mtd/ubi/vtbl.c index f700f0e4f2ec..6e5489e233dd 100644 --- a/drivers/mtd/ubi/vtbl.c +++ b/drivers/mtd/ubi/vtbl.c @@ -791,6 +791,12 @@ int ubi_read_volume_table(struct ubi_device *ubi, struct ubi_attach_info *ai) * The number of supported volumes is limited by the eraseblock size * and by the UBI_MAX_VOLUMES constant. */ + + if (ubi->leb_size < UBI_VTBL_RECORD_SIZE) { + ubi_err(ubi, "LEB size too small for a volume record"); + return -EINVAL; + } + ubi->vtbl_slots = ubi->leb_size / UBI_VTBL_RECORD_SIZE; if (ubi->vtbl_slots > UBI_MAX_VOLUMES) ubi->vtbl_slots = UBI_MAX_VOLUMES; |