{"schema_version":"1.9.0","id":"CVE-2022-50705","published":"2025-12-24T10:55:20.020Z","modified":"2026-08-12T03:51:18.766022654Z","related":["SUSE-SU-2026:0263-1","SUSE-SU-2026:0317-1"],"summary":"io_uring/rw: defer fsnotify calls to task context","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/rw: defer fsnotify calls to task context\n\nWe can't call these off the kiocb completion as that might be off\nsoft/hard irq context. Defer the calls to when we process the\ntask_work for this request. That avoids valid complaints like:\n\nstack backtrace:\nCPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.0.0-rc6-syzkaller-00321-g105a36f3694e #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022\nCall Trace:\n <IRQ>\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\n print_usage_bug kernel/locking/lockdep.c:3961 [inline]\n valid_state kernel/locking/lockdep.c:3973 [inline]\n mark_lock_irq kernel/locking/lockdep.c:4176 [inline]\n mark_lock.part.0.cold+0x18/0xd8 kernel/locking/lockdep.c:4632\n mark_lock kernel/locking/lockdep.c:4596 [inline]\n mark_usage kernel/locking/lockdep.c:4527 [inline]\n __lock_acquire+0x11d9/0x56d0 kernel/locking/lockdep.c:5007\n lock_acquire kernel/locking/lockdep.c:5666 [inline]\n lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5631\n __fs_reclaim_acquire mm/page_alloc.c:4674 [inline]\n fs_reclaim_acquire+0x115/0x160 mm/page_alloc.c:4688\n might_alloc include/linux/sched/mm.h:271 [inline]\n slab_pre_alloc_hook mm/slab.h:700 [inline]\n slab_alloc mm/slab.c:3278 [inline]\n __kmem_cache_alloc_lru mm/slab.c:3471 [inline]\n kmem_cache_alloc+0x39/0x520 mm/slab.c:3491\n fanotify_alloc_fid_event fs/notify/fanotify/fanotify.c:580 [inline]\n fanotify_alloc_event fs/notify/fanotify/fanotify.c:813 [inline]\n fanotify_handle_event+0x1130/0x3f40 fs/notify/fanotify/fanotify.c:948\n send_to_group fs/notify/fsnotify.c:360 [inline]\n fsnotify+0xafb/0x1680 fs/notify/fsnotify.c:570\n __fsnotify_parent+0x62f/0xa60 fs/notify/fsnotify.c:230\n fsnotify_parent include/linux/fsnotify.h:77 [inline]\n fsnotify_file include/linux/fsnotify.h:99 [inline]\n fsnotify_access include/linux/fsnotify.h:309 [inline]\n __io_complete_rw_common+0x485/0x720 io_uring/rw.c:195\n io_complete_rw+0x1a/0x1f0 io_uring/rw.c:228\n iomap_dio_complete_work fs/iomap/direct-io.c:144 [inline]\n iomap_dio_bio_end_io+0x438/0x5e0 fs/iomap/direct-io.c:178\n bio_endio+0x5f9/0x780 block/bio.c:1564\n req_bio_endio block/blk-mq.c:695 [inline]\n blk_update_request+0x3fc/0x1300 block/blk-mq.c:825\n scsi_end_request+0x7a/0x9a0 drivers/scsi/scsi_lib.c:541\n scsi_io_completion+0x173/0x1f70 drivers/scsi/scsi_lib.c:971\n scsi_complete+0x122/0x3b0 drivers/scsi/scsi_lib.c:1438\n blk_complete_reqs+0xad/0xe0 block/blk-mq.c:1022\n __do_softirq+0x1d3/0x9c6 kernel/softirq.c:571\n invoke_softirq kernel/softirq.c:445 [inline]\n __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650\n irq_exit_rcu+0x5/0x20 kernel/softirq.c:662\n common_interrupt+0xa9/0xc0 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