Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: io_uring/tctx: work around xa_store() allocation error issue syzbot triggered the following WARN_ON: WARNING: CPU: 0 PID: 16 at io_uring/tctx.c:51 __io_uring_free+0xfa/0x140 io_uring/tctx.c:51 which is the WARN_ON_ONCE(!xa_empty(&tctx->xa)); sanity check in __io_uring_free() when a io_uring_task is going through its final put. The syzbot test case includes injecting memory allocation failures, and it very much looks like xa_store() can fail one of its memory allocations and end up with ->head being non-NULL even though no entries exist in the xarray. Until this issue gets sorted out, work around it by attempting to iterate entries in our xarray, and WARN_ON_ONCE() if one is found.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 2b188cc1bb857a9d4701ae59aa7768b5124e262e before e05c070b401f6365c503e2b59f091331965c4fb9; affected 2b188cc1bb857a9d4701ae59aa7768b5124e262e before 3a84fa784710990964c1e35df743851ab2863898; affected 2b188cc1bb857a9d4701ae59aa7768b5124e262e before 94ad56f61b873ffeebcc620d451eacfbdf9d40f0; affected 2b188cc1bb857a9d4701ae59aa7768b5124e262e before 42882b583095dcf747da6e3af1daeff40e27033e; affected 2b188cc1bb857a9d4701ae59aa7768b5124e262e before d5b2ddf1f90c7248eff9630b95895c8950f2f36d; affected 2b188cc1bb857a9d4701ae59aa7768b5124e262e before 7eb75ce7527129d7f1fee6951566af409a37a1c4 |
| Linux / Linux | affected 5.1; unaffected 0 before 5.1; unaffected 5.10.253 through 5.10.*; unaffected 5.15.203 through 5.15.*; unaffected 6.1.120 through 6.1.*; unaffected 6.6.66 through 6.6.*; unaffected 6.12.5 through 6.12.*; unaffected 6.13 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/e05c070b401f6365c503e2b59f091331965c4fb9
- https://git.kernel.org/stable/c/3a84fa784710990964c1e35df743851ab2863898
- https://git.kernel.org/stable/c/94ad56f61b873ffeebcc620d451eacfbdf9d40f0
- https://git.kernel.org/stable/c/42882b583095dcf747da6e3af1daeff40e27033e
- https://git.kernel.org/stable/c/d5b2ddf1f90c7248eff9630b95895c8950f2f36d
- https://git.kernel.org/stable/c/7eb75ce7527129d7f1fee6951566af409a37a1c4
ADP enrichment
No English description supplied.