Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: perf: Fix sample vs do_exit() Baisheng Gao reported an ARM64 crash, which Mark decoded as being a synchronous external abort -- most likely due to trying to access MMIO in bad ways. The crash further shows perf trying to do a user stack sample while in exit_mmap()'s tlb_finish_mmu() -- i.e. while tearing down the address space it is trying to access. It turns out that we stop perf after we tear down the userspace mm; a receipie for disaster, since perf likes to access userspace for various reasons. Flip this order by moving up where we stop perf in do_exit(). Additionally, harden PERF_SAMPLE_CALLCHAIN and PERF_SAMPLE_STACK_USER to abort when the current task does not have an mm (exit_mm() makes sure to set current->mm = NULL; before commencing with the actual teardown). Such that CPU wide events don't trip on this same problem.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected c5ebcedb566ef17bda7b02686e0d658a7bb42ee7 before 7b8f3c72175c6a63a95cf2e219f8b78e2baad34e; affected c5ebcedb566ef17bda7b02686e0d658a7bb42ee7 before 507c9a595bad3abd107c6a8857d7fd125d89f386; affected c5ebcedb566ef17bda7b02686e0d658a7bb42ee7 before a9f6aab7910a0ef2895797f15c947f6d1053160f; affected c5ebcedb566ef17bda7b02686e0d658a7bb42ee7 before 975ffddfa2e19823c719459d2364fcaa17673964; affected c5ebcedb566ef17bda7b02686e0d658a7bb42ee7 before 2ee6044a693735396bb47eeaba1ac3ae26c1c99b; affected c5ebcedb566ef17bda7b02686e0d658a7bb42ee7 before 456019adaa2f5366b89c868dea9b483179bece54; affected c5ebcedb566ef17bda7b02686e0d658a7bb42ee7 before 7311970d07c4606362081250da95f2c7901fc0db; affected c5ebcedb566ef17bda7b02686e0d658a7bb42ee7 before 4f6fc782128355931527cefe3eb45338abd8ab39 |
| Linux / Linux | affected 3.7; unaffected 0 before 3.7; unaffected 5.4.295 through 5.4.*; unaffected 5.10.239 through 5.10.*; unaffected 5.15.186 through 5.15.*; unaffected 6.1.142 through 6.1.*; unaffected 6.6.95 through 6.6.*; unaffected 6.12.35 through 6.12.*; unaffected 6.15.4 through 6.15.*; unaffected 6.16 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/7b8f3c72175c6a63a95cf2e219f8b78e2baad34e
- https://git.kernel.org/stable/c/507c9a595bad3abd107c6a8857d7fd125d89f386
- https://git.kernel.org/stable/c/a9f6aab7910a0ef2895797f15c947f6d1053160f
- https://git.kernel.org/stable/c/975ffddfa2e19823c719459d2364fcaa17673964
- https://git.kernel.org/stable/c/2ee6044a693735396bb47eeaba1ac3ae26c1c99b
- https://git.kernel.org/stable/c/456019adaa2f5366b89c868dea9b483179bece54
- https://git.kernel.org/stable/c/7311970d07c4606362081250da95f2c7901fc0db
- https://git.kernel.org/stable/c/4f6fc782128355931527cefe3eb45338abd8ab39
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.