jbd2: fix deadlock in jbd2_journal_cancel_revoke()
Summary
| CVE | CVE-2026-46061 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-27 14:17:25 UTC |
| Updated | 2026-05-27 14:48:03 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: jbd2: fix deadlock in jbd2_journal_cancel_revoke() Commit f76d4c28a46a ("fs/jbd2: use sleeping version of __find_get_block()") changed jbd2_journal_cancel_revoke() to use __find_get_block_nonatomic() which holds the folio lock instead of i_private_lock. This breaks the lock ordering (folio -> buffer) and causes an ABBA deadlock when the filesystem blocksize < pagesize: T1 T2 ext4_mkdir() ext4_init_new_dir() ext4_append() ext4_getblk() lock_buffer() <- A sync_blockdev() blkdev_writepages() writeback_iter() writeback_get_folio() folio_lock() <- B ext4_journal_get_create_access() jbd2_journal_cancel_revoke() __find_get_block_nonatomic() folio_lock() <- B block_write_full_folio() lock_buffer() <- A This can occasionally cause generic/013 to hang. Fix by only calling __find_get_block_nonatomic() when the passed buffer_head doesn't belong to the bdev, which is the only case that we need to look up its bdev alias. Otherwise, the lookup is redundant since the found buffer_head is equal to the one we passed in. |
Risk And Classification
EPSS: 0.000180000 probability, percentile 0.048460000 (date 2026-06-01)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected f1c5aa614b5c251f93a6a4c8c26001d5e9e53fd6 dff07cc98fdf6af57a7c054dc09b2050a9d5c287 git | Not specified |
| CNA | Linux | Linux | affected f76d4c28a46a9260d85e00dafc8f46d369365d33 2b2fee890250ab647a601124471a334bb01a0790 git | Not specified |
| CNA | Linux | Linux | affected f76d4c28a46a9260d85e00dafc8f46d369365d33 bbd943d6a2d566428324b516a37f98328dfb802d git | Not specified |
| CNA | Linux | Linux | affected f76d4c28a46a9260d85e00dafc8f46d369365d33 981fcc5674e67158d24d23e841523eccba19d0e7 git | Not specified |
| CNA | Linux | Linux | affected 1bb7a4b6b3d7dd8da6f5a9d0529d42c22a359e71 git | Not specified |
| CNA | Linux | Linux | affected 6.12.31 6.12.86 semver | Not specified |
| CNA | Linux | Linux | affected 6.14.9 6.15 semver | Not specified |
| CNA | Linux | Linux | affected 6.15 | Not specified |
| CNA | Linux | Linux | unaffected 6.15 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.86 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.27 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0.4 7.0.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1-rc1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/2b2fee890250ab647a601124471a334bb01a0790 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/981fcc5674e67158d24d23e841523eccba19d0e7 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/bbd943d6a2d566428324b516a37f98328dfb802d | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/dff07cc98fdf6af57a7c054dc09b2050a9d5c287 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.