- Vulnerability/
- CVE-2024-53234
CVE-2024-53234: erofs: handle NONHEAD !delta[1] lclusters gracefully
First published: Fri Dec 27 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: erofs: handle NONHEAD !delta[1] lclusters gracefully syzbot reported a WARNING in iomap_iter_done: iomap_fiemap+0x73b/0x9b0 fs/iomap/fiemap.c:80 ioctl_fiemap fs/ioctl.c:220 [inline] Generally, NONHEAD lclusters won't have delta[1]==0, except for crafted images and filesystems created by pre-1.0 mkfs versions. Previously, it would immediately bail out if delta[1]==0, which led to inadequate decompressed lengths (thus FIEMAP is impacted). Treat it as delta[1]=1 to work around these legacy mkfs versions. `lclusterbits > 14` is illegal for compact indexes, error out too.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel |
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Reference Links
- https://git.kernel.org/stable/c/f466641debcbea8bdf78d1b63a6270aadf9301bf
- https://git.kernel.org/stable/c/480c6c7b55aeacac800bc2a0d321ff53273045e5
- https://git.kernel.org/stable/c/daaf68fef4b2ff97928227630021d37b27a96655
- https://git.kernel.org/stable/c/0bc8061ffc733a0a246b8689b2d32a3e9204f43c
- https://git.kernel.org/stable/c/75a0a6dde803e7a3af700da8da9a361b49f69eba
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