CVE-2024-40922

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> io_uring/rsrc: don&amp;#39;t lock while !TASK_RUNNING<br /> <br /> There is a report of io_rsrc_ref_quiesce() locking a mutex while not<br /> TASK_RUNNING, which is due to forgetting restoring the state back after<br /> io_run_task_work_sig() and attempts to break out of the waiting loop.<br /> <br /> do not call blocking ops when !TASK_RUNNING; state=1 set at<br /> [] prepare_to_wait+0xa4/0x380<br /> kernel/sched/wait.c:237<br /> WARNING: CPU: 2 PID: 397056 at kernel/sched/core.c:10099<br /> __might_sleep+0x114/0x160 kernel/sched/core.c:10099<br /> RIP: 0010:__might_sleep+0x114/0x160 kernel/sched/core.c:10099<br /> Call Trace:<br /> <br /> __mutex_lock_common kernel/locking/mutex.c:585 [inline]<br /> __mutex_lock+0xb4/0x940 kernel/locking/mutex.c:752<br /> io_rsrc_ref_quiesce+0x590/0x940 io_uring/rsrc.c:253<br /> io_sqe_buffers_unregister+0xa2/0x340 io_uring/rsrc.c:799<br /> __io_uring_register io_uring/register.c:424 [inline]<br /> __do_sys_io_uring_register+0x5b9/0x2400 io_uring/register.c:613<br /> do_syscall_x64 arch/x86/entry/common.c:52 [inline]<br /> do_syscall_64+0xd8/0x270 arch/x86/entry/common.c:83<br /> entry_SYSCALL_64_after_hwframe+0x6f/0x77