Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: fs/proc: do_task_stat: use sig->stats_lock to gather the threads/children stats lock_task_sighand() can trigger a hard lockup. If NR_CPUS threads call do_task_stat() at the same time and the process has NR_THREADS, it will spin with irqs disabled O(NR_CPUS * NR_THREADS) time. Change do_task_stat() to use sig->stats_lock to gather the statistics outside of ->siglock protected section, in the likely case this code will run lockless.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 4fe85bdaabd63f8f8579b24a10ed597c9c482164; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 0c35d1914353799c54fa1843fe7dea6fcbcdbac5; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before cf4b8c39b9a0bd81c47afc7ef62914a62dd5ec4d; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 3820b0fac7732a653bcc6f6ac20c1d72e697f8f6; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 27978243f165b44e342f28f449b91327944ea071; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 7601df8031fd67310af891897ef6cc0df4209305 |
| Linux / Linux | affected 2.6.12; unaffected 0 before 2.6.12; unaffected 5.10.237 through 5.10.*; unaffected 5.15.181 through 5.15.*; unaffected 6.1.82 through 6.1.*; unaffected 6.6.64 through 6.6.*; unaffected 6.7.6 through 6.7.*; unaffected 6.8 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/4fe85bdaabd63f8f8579b24a10ed597c9c482164
- https://git.kernel.org/stable/c/0c35d1914353799c54fa1843fe7dea6fcbcdbac5
- https://git.kernel.org/stable/c/cf4b8c39b9a0bd81c47afc7ef62914a62dd5ec4d
- https://git.kernel.org/stable/c/3820b0fac7732a653bcc6f6ac20c1d72e697f8f6
- https://git.kernel.org/stable/c/27978243f165b44e342f28f449b91327944ea071
- https://git.kernel.org/stable/c/7601df8031fd67310af891897ef6cc0df4209305
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.