Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: userfaultfd: don't BUG_ON() if khugepaged yanks our page table Since khugepaged was changed to allow retracting page tables in file mappings without holding the mmap lock, these BUG_ON()s are wrong - get rid of them. We could also remove the preceding "if (unlikely(...))" block, but then we could reach pte_offset_map_lock() with transhuge pages not just for file mappings but also for anonymous mappings - which would probably be fine but I think is not necessarily expected.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1d65b771bc08cd054cf6d3766a72e113dc46d62f before 4a594acc12d5954cdc71d4450a386748bf3d136a; affected 1d65b771bc08cd054cf6d3766a72e113dc46d62f before db978287e908d48b209e374b00d847b2d785e0a9; affected 1d65b771bc08cd054cf6d3766a72e113dc46d62f before 4828d207dc5161dc7ddf9a4f6dcfd80c7dd7d20a |
| Linux / Linux | affected 6.6; unaffected 0 before 6.6; unaffected 6.6.51 through 6.6.*; unaffected 6.10.10 through 6.10.*; unaffected 6.11 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/4a594acc12d5954cdc71d4450a386748bf3d136a
- https://git.kernel.org/stable/c/db978287e908d48b209e374b00d847b2d785e0a9
- https://git.kernel.org/stable/c/4828d207dc5161dc7ddf9a4f6dcfd80c7dd7d20a
ADP enrichment
No English description supplied.
No references supplied.