INFO: task udevd:4125 blocked for more than 143 seconds. Not tainted 5.18.0-rc2-syzkaller-00275-g59250f8a7f3a #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:26152 pid: 4125 ppid: 2961 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5073 [inline] __schedule+0xa9a/0x4cc0 kernel/sched/core.c:6388 schedule+0xd2/0x1f0 kernel/sched/core.c:6460 io_schedule+0xba/0x130 kernel/sched/core.c:8563 folio_wait_bit_common+0x4f2/0xa90 mm/filemap.c:1324 folio_wait_bit mm/filemap.c:1473 [inline] folio_wait_locked include/linux/pagemap.h:976 [inline] folio_wait_locked include/linux/pagemap.h:973 [inline] do_read_cache_folio+0x506/0x760 mm/filemap.c:3516 do_read_cache_page mm/filemap.c:3588 [inline] read_cache_page+0x59/0x2a0 mm/filemap.c:3597 read_mapping_page include/linux/pagemap.h:759 [inline] read_part_sector+0xf6/0x920 block/partitions/core.c:723 adfspart_check_ICS+0x9a/0x690 block/partitions/acorn.c:360 check_partition block/partitions/core.c:147 [inline] blk_add_partitions block/partitions/core.c:608 [inline] bdev_disk_changed block/partitions/core.c:694 [inline] bdev_disk_changed+0x629/0xf60 block/partitions/core.c:661 blkdev_get_whole+0x206/0x2d0 block/bdev.c:679 blkdev_get_by_dev.part.0+0x5d2/0xc80 block/bdev.c:816 blkdev_get_by_dev+0x6b/0x80 block/bdev.c:850 blkdev_open+0x13c/0x2c0 block/fops.c:498 do_dentry_open+0x4a1/0x11e0 fs/open.c:824 do_open fs/namei.c:3476 [inline] path_openat+0x1c71/0x2910 fs/namei.c:3609 do_filp_open+0x1aa/0x400 fs/namei.c:3636 do_sys_openat2+0x16d/0x4c0 fs/open.c:1213 do_sys_open fs/open.c:1229 [inline] __do_sys_openat fs/open.c:1245 [inline] __se_sys_openat fs/open.c:1240 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1240 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f1b30f25697 RSP: 002b:00007ffe16eaf4f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 000056411dc5f0c0 RCX: 00007f1b30f25697 RDX: 00000000000a0800 RSI: 000056411dc3a5f0 RDI: 00000000ffffff9c RBP: 000056411dc3a5f0 R08: 0000000000000001 R09: 00007ffe16fc0080 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800 R13: 000056411dc3a450 R14: 0000000000000001 R15: 000056411dc39910 INFO: task syz-executor.5:15794 blocked for more than 143 seconds. Not tainted 5.18.0-rc2-syzkaller-00275-g59250f8a7f3a #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:28032 pid:15794 ppid: 3620 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5073 [inline] __schedule+0xa9a/0x4cc0 kernel/sched/core.c:6388 schedule+0xd2/0x1f0 kernel/sched/core.c:6460 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6519 __mutex_lock_common kernel/locking/mutex.c:673 [inline] __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733 blkdev_put+0x99/0x950 block/bdev.c:905 blkdev_close+0x64/0x80 block/fops.c:512 __fput+0x277/0x9d0 fs/file_table.c:317 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:294 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f6d6863bd2b RSP: 002b:00007ffc9e2f7420 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007f6d6863bd2b RDX: 0000001b2db20000 RSI: 0000001b2db22454 RDI: 0000000000000006 RBP: 00007f6d6879d960 R08: 0000000000000000 R09: 000000005068e8f7 R10: 00007ffc9e363090 R11: 0000000000000293 R12: 0000000000064cc9 R13: 00007ffc9e2f7520 R14: 00007ffc9e2f7540 R15: 0000000000000032 INFO: task syz-executor.5:15795 blocked for more than 143 seconds. Not tainted 5.18.0-rc2-syzkaller-00275-g59250f8a7f3a #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:28336 pid:15795 ppid: 3620 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5073 [inline] __schedule+0xa9a/0x4cc0 kernel/sched/core.c:6388 schedule+0xd2/0x1f0 kernel/sched/core.c:6460 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6519 __mutex_lock_common kernel/locking/mutex.c:673 [inline] __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733 blkdev_put+0x99/0x950 block/bdev.c:905 blkdev_close+0x64/0x80 block/fops.c:512 __fput+0x277/0x9d0 fs/file_table.c:317 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:294 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f6d686890e9 RSP: 002b:00007f6d675fe168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: 0000000000000000 RBX: 00007f6d6879bf60 RCX: 00007f6d686890e9 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003 RBP: 00007f6d686e308d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc9e2f73bf R14: 00007f6d675fe300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/28: #0: ffffffff8bd81de0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6467 2 locks held by getty/3273: #0: ffff88801dfa2098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc90002e662e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcea/0x1230 drivers/tty/n_tty.c:2075 1 lock held by udevd/4125: #0: ffff8881483e4118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xc80 block/bdev.c:807 1 lock held by syz-executor.5/15794: #0: ffff8881483e4118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0x99/0x950 block/bdev.c:905 1 lock held by syz-executor.5/15795: #0: ffff8881483e4118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0x99/0x950 block/bdev.c:905 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: khungtaskd Not tainted 5.18.0-rc2-syzkaller-00275-g59250f8a7f3a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0xc1d/0xf50 kernel/hung_task.c:369 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 90 Comm: kworker/u4:3 Not tainted 5.18.0-rc2-syzkaller-00275-g59250f8a7f3a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy5 ieee80211_iface_work RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:166 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:200 Code: 48 89 ef 5d e9 c1 ec 4a 00 5d be 03 00 00 00 e9 96 bb 74 02 66 0f 1f 44 00 00 48 8b be a8 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 <65> 8b 05 39 54 89 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b RSP: 0018:ffffc90001c5f810 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000000000002b RDX: 0000000000000000 RSI: ffff888018e5d700 RDI: 0000000000000003 RBP: 0000000000000006 R08: ffffffff8af0cd20 R09: ffffffff88b83b0b R10: 000000000000002b R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff88801b7ed475 R15: ffff88801b7ed474 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c0118e3040 CR3: 000000007e166000 CR4: 0000000000350ee0 Call Trace: _ieee802_11_parse_elems_crc+0x531/0x2670 net/mac80211/util.c:1126 ieee802_11_parse_elems_crc+0x812/0x1050 net/mac80211/util.c:1521 ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2251 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1605 [inline] ieee80211_ibss_rx_queued_mgmt+0xda5/0x33b0 net/mac80211/ibss.c:1639 ieee80211_iface_process_skb net/mac80211/iface.c:1527 [inline] ieee80211_iface_work+0xa6f/0xd10 net/mac80211/iface.c:1581 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 ---------------- Code disassembly (best guess): 0: 48 89 ef mov %rbp,%rdi 3: 5d pop %rbp 4: e9 c1 ec 4a 00 jmpq 0x4aecca 9: 5d pop %rbp a: be 03 00 00 00 mov $0x3,%esi f: e9 96 bb 74 02 jmpq 0x274bbaa 14: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) 1a: 48 8b be a8 01 00 00 mov 0x1a8(%rsi),%rdi 21: e8 b4 ff ff ff callq 0xffffffda 26: 31 c0 xor %eax,%eax 28: c3 retq 29: 90 nop * 2a: 65 8b 05 39 54 89 7e mov %gs:0x7e895439(%rip),%eax # 0x7e89546a <-- trapping instruction 31: 89 c1 mov %eax,%ecx 33: 48 8b 34 24 mov (%rsp),%rsi 37: 81 e1 00 01 00 00 and $0x100,%ecx 3d: 65 gs 3e: 48 rex.W 3f: 8b .byte 0x8b