Tracker / CVE-2024-46840
CVE-2024-46840
In the Linux kernel, the following vulnerability has been resolved: btrfs: clean up our handling of refs == 0 in snapshot delete In reada we BUG_ON(refs == 0), which could be unkind since we aren't holding a lock on the extent leaf and thus could get a transient incorrect answer. In walk_down_proc we also BUG_ON(refs == 0), which could happen if we have extent tree corruption. Change that to return -EUCLEAN. In do_walk_down() we catch this case and handle it correctly, however we return -EIO, which -EUCLEAN is a more appropriate error code. Finally in walk_up_proc we have the same BUG_ON(refs == 0), so convert that to proper error handling. Also adjust the error message so we can actually do something with the information.
Affected products and versions
| linux | linux_kernel · … → 4.19.322 |
|---|---|
| linux | linux_kernel · 4.20 → 5.4.284 |
| linux | linux_kernel · 5.11 → 5.15.167 |
| linux | linux_kernel · 5.16 → 6.1.110 |
| linux | linux_kernel · 5.5 → 5.10.226 |
| linux | linux_kernel · 6.2 → 6.6.51 |
| linux | linux_kernel · 6.7 → 6.10.10 |