Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: io_uring: lock overflowing for IOPOLL syzbot reports an issue with overflow filling for IOPOLL: WARNING: CPU: 0 PID: 28 at io_uring/io_uring.c:734 io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 CPU: 0 PID: 28 Comm: kworker/u4:1 Not tainted 6.2.0-rc3-syzkaller-16369-g358a161a6a9e #0 Workqueue: events_unbound io_ring_exit_work Call trace: io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 io_req_cqe_overflow+0x5c/0x70 io_uring/io_uring.c:773 io_fill_cqe_req io_uring/io_uring.h:168 [inline] io_do_iopoll+0x474/0x62c io_uring/rw.c:1065 io_iopoll_try_reap_events+0x6c/0x108 io_uring/io_uring.c:1513 io_uring_try_cancel_requests+0x13c/0x258 io_uring/io_uring.c:3056 io_ring_exit_work+0xec/0x390 io_uring/io_uring.c:2869 process_one_work+0x2d8/0x504 kernel/workqueue.c:2289 worker_thread+0x340/0x610 kernel/workqueue.c:2436 kthread+0x12c/0x158 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863 There is no real problem for normal IOPOLL as flush is also called with uring_lock taken, but it's getting more complicated for IOPOLL|SQPOLL, for which __io_cqring_overflow_flush() happens from the CQ waiting path.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 2b188cc1bb857a9d4701ae59aa7768b5124e262e before de77faee280163ff03b7ab64af6c9d779a43d4c4; affected 2b188cc1bb857a9d4701ae59aa7768b5124e262e before ed4629d1e968359fbb91d0a3780b1e86a2c08845; affected 2b188cc1bb857a9d4701ae59aa7768b5124e262e before 7fc3990dad04a677606337ebc61964094d6cb41b; affected 2b188cc1bb857a9d4701ae59aa7768b5124e262e before 544d163d659d45a206d8929370d5a2984e546cb7 |
| Linux / Linux | affected 5.1; unaffected 0 before 5.1; unaffected 5.10.165 through 5.10.*; unaffected 5.15.89 through 5.15.*; unaffected 6.1.7 through 6.1.*; unaffected 6.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/de77faee280163ff03b7ab64af6c9d779a43d4c4
- https://git.kernel.org/stable/c/ed4629d1e968359fbb91d0a3780b1e86a2c08845
- https://git.kernel.org/stable/c/7fc3990dad04a677606337ebc61964094d6cb41b
- https://git.kernel.org/stable/c/544d163d659d45a206d8929370d5a2984e546cb7
ADP enrichment
No English description supplied.
No references supplied.