CVE-2025-38451
Description
In the Linux kernel, the following vulnerability has been resolved: md/md-bitmap: fix GPF in bitmap_get_stats() The commit message of commit 6ec1f0239485 ("md/md-bitmap: fix stats collection for external bitmaps") states: Remove the external bitmap check as the statistics should be available regardless of bitmap storage location. Return -EINVAL only for invalid bitmap with no storage (neither in superblock nor in external file). But, the code does not adhere to the above, as it does only check for a valid super-block for "internal" bitmaps. Hence, we observe: Oops: GPF, probably for non-canonical address 0x1cd66f1f40000028 RIP: 0010:bitmap_get_stats+0x45/0xd0 Call Trace: seq_read_iter+0x2b9/0x46a seq_read+0x12f/0x180 proc_reg_read+0x57/0xb0 vfs_read+0xf6/0x380 ksys_read+0x6d/0xf0 do_syscall_64+0x8c/0x1b0 entry_SYSCALL_64_after_hwframe+0x76/0x7e We fix this by checking the existence of a super-block for both the internal and external case.
How to fix
- linux linux_kernel6.1.146, 6.6.99, 6.12.39, 6.15, 6.15.7 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 6.1.135 ≤ v < 6.1.146, 6.6.88 ≤ v < 6.6.99, 6.12.25 ≤ v < 6.12.39, 6.14.4 ≤ v < 6.15, 6.15.1 ≤ v < 6.15.7, 6.15, 6.16 | 6.1.146, 6.6.99, 6.12.39, 6.15, 6.15.7 |
| debian debian_linux | 11.0 | — |
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