Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: s390/mm: Fix VM_FAULT_HWPOISON handling in do_exception() There is no support for HWPOISON, MEMORY_FAILURE, or ARCH_HAS_COPY_MC on s390. Therefore we do not expect to see VM_FAULT_HWPOISON in do_exception(). However, since commit af19487f00f3 ("mm: make PTE_MARKER_SWAPIN_ERROR more general"), it is possible to see VM_FAULT_HWPOISON in combination with PTE_MARKER_POISONED, even on architectures that do not support HWPOISON otherwise. In this case, we will end up on the BUG() in do_exception(). Fix this by treating VM_FAULT_HWPOISON the same as VM_FAULT_SIGBUS, similar to x86 when MEMORY_FAILURE is not configured. Also print unexpected fault flags, for easier debugging. Note that VM_FAULT_HWPOISON_LARGE is not expected, because s390 cannot support swap entries on other levels than PTE level.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected af19487f00f34ff8643921d7909dbb3fedc7e329 before 73a9260b7366d2906ec011e100319359fe2277d0; affected af19487f00f34ff8643921d7909dbb3fedc7e329 before 9e13767ccefdc4f8aa92514b592b60f6b54882ff; affected af19487f00f34ff8643921d7909dbb3fedc7e329 before a3aefb871222a9880602d1a44a558177b4143e3b; affected af19487f00f34ff8643921d7909dbb3fedc7e329 before df39038cd89525d465c2c8827eb64116873f141a |
| Linux / Linux | affected 6.6; unaffected 0 before 6.6; unaffected 6.6.44 through 6.6.*; unaffected 6.9.12 through 6.9.*; unaffected 6.10.2 through 6.10.*; unaffected 6.11 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/73a9260b7366d2906ec011e100319359fe2277d0
- https://git.kernel.org/stable/c/9e13767ccefdc4f8aa92514b592b60f6b54882ff
- https://git.kernel.org/stable/c/a3aefb871222a9880602d1a44a558177b4143e3b
- https://git.kernel.org/stable/c/df39038cd89525d465c2c8827eb64116873f141a
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.