INFO: task systemd-udevd:9148 blocked for more than 143 seconds. Not tainted 5.7.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. systemd-udevd D25440 9148 3874 0x00000100 Call Trace: context_switch kernel/sched/core.c:3430 [inline] __schedule+0x8f3/0x1fc0 kernel/sched/core.c:4156 schedule+0xd0/0x2a0 kernel/sched/core.c:4231 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4290 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x7b3/0x13c0 kernel/locking/mutex.c:1103 __blkdev_get+0x179/0x1530 fs/block_dev.c:1582 blkdev_get+0x41/0x2b0 fs/block_dev.c:1730 blkdev_open+0x21d/0x2b0 fs/block_dev.c:1869 do_dentry_open+0x546/0x1340 fs/open.c:828 do_open fs/namei.c:3229 [inline] path_openat+0x1e59/0x27d0 fs/namei.c:3346 do_filp_open+0x192/0x260 fs/namei.c:3373 do_sys_openat2+0x585/0x7d0 fs/open.c:1179 do_sys_open+0xc3/0x140 fs/open.c:1195 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x7fadf46c6840 Code: Bad RIP value. RSP: 002b:00007ffc7a1722c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000565112505cd0 RCX: 00007fadf46c6840 RDX: 00005651107e8fe3 RSI: 00000000000a0800 RDI: 000056511251b5c0 RBP: 00007ffc7a172440 R08: 00005651107e8670 R09: 0000000000000010 R10: 00005651107e8d0c R11: 0000000000000246 R12: 00007ffc7a172390 R13: 0000565112508ab0 R14: 0000000000000003 R15: 000000000000000e INFO: task syz-executor.1:365 blocked for more than 143 seconds. Not tainted 5.7.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D26032 365 6930 0x00004004 Call Trace: context_switch kernel/sched/core.c:3430 [inline] __schedule+0x8f3/0x1fc0 kernel/sched/core.c:4156 schedule+0xd0/0x2a0 kernel/sched/core.c:4231 io_schedule+0x17/0x60 kernel/sched/core.c:5874 wait_on_page_bit_common+0x351/0xdb0 mm/filemap.c:1150 wait_on_page_bit mm/filemap.c:1199 [inline] wait_on_page_locked include/linux/pagemap.h:568 [inline] wait_on_page_read mm/filemap.c:2729 [inline] do_read_cache_page+0xf95/0x1810 mm/filemap.c:2772 read_mapping_page include/linux/pagemap.h:437 [inline] read_part_sector+0xf6/0x600 block/partitions/core.c:772 adfspart_check_ICS+0x9d/0xc80 block/partitions/acorn.c:360 check_partition block/partitions/core.c:140 [inline] blk_add_partitions+0x474/0xe40 block/partitions/core.c:700 bdev_disk_changed+0x1fb/0x380 fs/block_dev.c:1525 __blkdev_get+0x130c/0x1530 fs/block_dev.c:1663 blkdev_get+0x41/0x2b0 fs/block_dev.c:1730 blkdev_open+0x21d/0x2b0 fs/block_dev.c:1869 do_dentry_open+0x546/0x1340 fs/open.c:828 do_open fs/namei.c:3229 [inline] path_openat+0x1e59/0x27d0 fs/namei.c:3346 do_filp_open+0x192/0x260 fs/namei.c:3373 do_sys_openat2+0x585/0x7d0 fs/open.c:1179 do_sys_open+0xc3/0x140 fs/open.c:1195 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x416851 Code: Bad RIP value. RSP: 002b:00007fae221a27a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000416851 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fae221a2850 RBP: 000000000078bf00 R08: 00007fae221a27b0 R09: 000000000078bf00 R10: 0000000000000000 R11: 0000000000000293 R12: 00000000ffffffff R13: 0000000000000c40 R14: 00000000004ce94e R15: 00007fae221a36d4 INFO: task syz-executor.1:369 blocked for more than 144 seconds. Not tainted 5.7.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28488 369 6930 0x00004004 Call Trace: context_switch kernel/sched/core.c:3430 [inline] __schedule+0x8f3/0x1fc0 kernel/sched/core.c:4156 schedule+0xd0/0x2a0 kernel/sched/core.c:4231 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4290 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x7b3/0x13c0 kernel/locking/mutex.c:1103 blkdev_put+0x30/0x520 fs/block_dev.c:1920 blkdev_close+0x8c/0xb0 fs/block_dev.c:1969 __fput+0x33e/0x880 fs/file_table.c:281 task_work_run+0xf4/0x1b0 kernel/task_work.c:123 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x2fa/0x360 arch/x86/entry/common.c:165 prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline] syscall_return_slowpath arch/x86/entry/common.c:279 [inline] do_syscall_64+0x6b1/0x7d0 arch/x86/entry/common.c:305 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca59 Code: Bad RIP value. RSP: 002b:00007fae22181c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: 0000000000000000 RBX: 00000000004e98c0 RCX: 000000000045ca59 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003 RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000415 R14: 00000000004c6d6f R15: 00007fae221826d4 Showing all locks held in the system: 3 locks held by kworker/u4:1/21: #0: ffff8880ae637dd8 (&rq->lock){-.-.}-{2:2}, at: newidle_balance+0x9ce/0xdd0 kernel/sched/fair.c:10525 #1: ffffffff899bdd80 (rcu_read_lock){....}-{1:2}, at: __update_idle_core+0x42/0x3e0 kernel/sched/fair.c:6002 #2: ffff8880ae627598 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x55/0x1a0 kernel/time/timer.c:935 1 lock held by khungtaskd/1143: #0: ffffffff899bdd80 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5779 1 lock held by in:imklog/6477: #0: ffff8880a7648e30 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:826 2 locks held by agetty/6484: #0: ffff8880a665b098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267 #1: ffffc90000f542e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x220/0x1b30 drivers/tty/n_tty.c:2156 1 lock held by systemd-udevd/9148: #0: ffff88808a60a900 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x179/0x1530 fs/block_dev.c:1582 1 lock held by syz-executor.1/365: #0: ffff88808a60a900 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x179/0x1530 fs/block_dev.c:1582 1 lock held by syz-executor.1/369: #0: ffff88808a60a900 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x30/0x520 fs/block_dev.c:1920 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1143 Comm: khungtaskd Not tainted 5.7.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x188/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1e6/0x221 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0xa8c/0x1010 kernel/hung_task.c:289 kthread+0x388/0x470 kernel/kthread.c:268 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 21 Comm: kworker/u4:1 Not tainted 5.7.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:__lock_acquire+0xa33/0x48a0 kernel/locking/lockdep.c:4363 Code: 24 10 4d 8b bd c0 08 00 00 45 85 d2 0f 84 fb 0f 00 00 45 31 f6 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 80 3c 02 00 <0f> 85 e3 32 00 00 48 8b 14 24 4c 89 7d 00 48 b8 00 00 00 00 00 fc RSP: 0018:ffffc90000dd7a68 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: 000000000000002c RCX: ffffffff8159bc2a RDX: 1ffff110152fc5d4 RSI: 0000000000000008 RDI: ffffffff8c3479a0 RBP: ffff8880a97e2ea0 R08: 0000000000000001 R09: fffffbfff1868f35 R10: 0000000000000002 R11: fffffbfff1868f34 R12: 0000000000000004 R13: ffff8880a97e2580 R14: 0000000000000000 R15: 2c211699f31b28af FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6d6c151028 CR3: 0000000094c32000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1f2/0x8f0 kernel/locking/lockdep.c:4959 rcu_lock_acquire include/linux/rcupdate.h:241 [inline] rcu_read_lock include/linux/rcupdate.h:634 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:407 [inline] batadv_nc_worker+0x114/0x760 net/batman-adv/network-coding.c:718 process_one_work+0x965/0x16a0 kernel/workqueue.c:2268 worker_thread+0x96/0xe20 kernel/workqueue.c:2414 kthread+0x388/0x470 kernel/kthread.c:268 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351