INFO: task systemd-udevd:15009 blocked for more than 143 seconds. Not tainted 5.14.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:26352 pid:15009 ppid: 4865 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 io_schedule+0xba/0x130 kernel/sched/core.c:8008 wait_on_page_bit_common+0x537/0xe60 mm/filemap.c:1301 wait_on_page_bit mm/filemap.c:1362 [inline] wait_on_page_locked include/linux/pagemap.h:689 [inline] wait_on_page_read mm/filemap.c:3312 [inline] do_read_cache_page+0x96b/0x13c0 mm/filemap.c:3355 read_mapping_page include/linux/pagemap.h:515 [inline] read_part_sector+0x146/0x620 block/partitions/core.c:726 adfspart_check_ICS+0x9d/0xc90 block/partitions/acorn.c:360 check_partition block/partitions/core.c:147 [inline] blk_add_partitions block/partitions/core.c:611 [inline] bdev_disk_changed+0x796/0x1130 block/partitions/core.c:697 blkdev_get_whole+0x216/0x420 fs/block_dev.c:1267 blkdev_get_by_dev.part.0+0x30c/0xdd0 fs/block_dev.c:1415 blkdev_get_by_dev fs/block_dev.c:1504 [inline] blkdev_open+0x295/0x300 fs/block_dev.c:1510 do_dentry_open+0x4c8/0x11d0 fs/open.c:826 do_open fs/namei.c:3374 [inline] path_openat+0x1c23/0x27f0 fs/namei.c:3507 do_filp_open+0x1aa/0x400 fs/namei.c:3534 do_sys_openat2+0x16d/0x420 fs/open.c:1204 do_sys_open fs/open.c:1220 [inline] __do_sys_open fs/open.c:1228 [inline] __se_sys_open fs/open.c:1224 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1224 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: 0033:0x7ff830f36840 RSP: 002b:00007ffe08dfb218 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000562fb80839d0 RCX: 00007ff830f36840 RDX: 0000562fb6600fe3 RSI: 00000000000a0800 RDI: 0000562fb808e340 RBP: 00007ffe08dfb390 R08: 0000562fb6600670 R09: 0000000000000010 R10: 0000562fb6600d0c R11: 0000000000000246 R12: 00007ffe08dfb2e0 R13: 0000562fb808e220 R14: 0000000000000003 R15: 000000000000000e INFO: task syz-executor.1:26243 blocked for more than 143 seconds. Not tainted 5.14.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28616 pid:26243 ppid: 8440 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6078 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0x7b6/0x10a0 kernel/locking/mutex.c:1104 blkdev_put+0xa0/0xae0 fs/block_dev.c:1532 blkdev_close+0x8c/0xb0 fs/block_dev.c:1584 __fput+0x288/0x920 fs/file_table.c:280 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:175 [inline] exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:209 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4193fb RSP: 002b:00007ffd62d11160 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00000000004193fb RDX: 0000001b33324458 RSI: ffffffff81358292 RDI: 0000000000000004 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b333235a4 R10: 00000000000008b2 R11: 0000000000000293 R12: 000000000056cb00 R13: 000000000056cb00 R14: 000000000056bf80 R15: 000000000007ce54 INFO: task syz-executor.1:26246 blocked for more than 143 seconds. Not tainted 5.14.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28040 pid:26246 ppid: 8440 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6078 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0x7b6/0x10a0 kernel/locking/mutex.c:1104 blkdev_put+0xa0/0xae0 fs/block_dev.c:1532 blkdev_close+0x8c/0xb0 fs/block_dev.c:1584 __fput+0x288/0x920 fs/file_table.c:280 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 get_signal+0x1b35/0x2160 kernel/signal.c:2581 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:209 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 RSP: 002b:00007f6bba6ed188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: fffffffffffffe00 RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffd62d110ff R14: 00007f6bba6ed300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1588: #0: ffffffff8b978f80 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 1 lock held by in:imklog/8139: #0: ffff888017102b70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:974 1 lock held by systemd-udevd/15009: #0: ffff88801f99d518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9d/0xdd0 fs/block_dev.c:1408 1 lock held by syz-executor.1/26243: #0: ffff88801f99d518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xa0/0xae0 fs/block_dev.c:1532 1 lock held by syz-executor.1/26246: #0: ffff88801f99d518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xa0/0xae0 fs/block_dev.c:1532 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1588 Comm: khungtaskd Not tainted 5.14.0-rc3-syzkaller #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:105 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xd0a/0xfc0 kernel/hung_task.c:295 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 26285 Comm: kworker/1:0 Not tainted 5.14.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: wg-crypt-wg0 wg_packet_tx_worker RIP: 0010:enqueue_to_backlog+0x947/0x10b0 net/core/dev.c:4711 Code: df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 bd 3c 03 7f b9 e8 da 76 a1 fa eb b2 e8 33 bd 5b fa e8 1e 19 11 02 e9 63 f8 ff ff 24 bd 5b fa e8 af e0 61 fa e9 7d fb ff ff e8 b5 76 a1 fa e9 1b RSP: 0018:ffffc90001da7580 EFLAGS: 00000006 RAX: 0000000000000000 RBX: ffff8880b9d52cc0 RCX: 0000000000000200 RDX: 0000000000000000 RSI: ffff88801f62a040 RDI: 0000000000000003 RBP: 0000000000002a37 R08: 0000000000000000 R09: ffff8880b9d52e53 R10: ffffffff8718ff2a R11: 0000000000000000 R12: 0000000000000200 R13: ffff8880b9d52e50 R14: ffff8880b9d52e38 R15: ffff8880b9d52e38 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f00d9b78000 CR3: 000000000b68e000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: netif_rx_internal+0x120/0x640 net/core/dev.c:4963 netif_rx+0x7f/0x510 net/core/dev.c:4990 loopback_xmit+0x222/0x630 drivers/net/loopback.c:88 __netdev_start_xmit include/linux/netdevice.h:4944 [inline] netdev_start_xmit include/linux/netdevice.h:4958 [inline] xmit_one net/core/dev.c:3659 [inline] dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3675 __dev_queue_xmit+0x2988/0x3620 net/core/dev.c:4285 neigh_hh_output include/net/neighbour.h:499 [inline] neigh_output include/net/neighbour.h:508 [inline] ip6_finish_output2+0x974/0x19d0 net/ipv6/ip6_output.c:145 __ip6_finish_output net/ipv6/ip6_output.c:210 [inline] __ip6_finish_output+0x4c1/0x1050 net/ipv6/ip6_output.c:189 ip6_finish_output+0x32/0x200 net/ipv6/ip6_output.c:220 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip6_output+0x1e4/0x530 net/ipv6/ip6_output.c:243 dst_output include/net/dst.h:448 [inline] ip6_local_out+0xaf/0x1a0 net/ipv6/output_core.c:161 ip6tunnel_xmit include/net/ip6_tunnel.h:160 [inline] udp_tunnel6_xmit_skb+0x6a6/0xba0 net/ipv6/ip6_udp_tunnel.c:109 send6+0x4a2/0xcc0 drivers/net/wireguard/socket.c:152 wg_socket_send_skb_to_peer+0xf5/0x220 drivers/net/wireguard/socket.c:177 wg_packet_create_data_done drivers/net/wireguard/send.c:251 [inline] wg_packet_tx_worker+0x1a7/0x720 drivers/net/wireguard/send.c:276 process_one_work+0x98d/0x1630 kernel/workqueue.c:2276 worker_thread+0x658/0x11f0 kernel/workqueue.c:2422 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295