INFO: task systemd-udevd:10745 blocked for more than 143 seconds. Not tainted 5.9.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:26400 pid:10745 ppid: 3906 flags:0x00000100 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x8e5/0x21e0 kernel/sched/core.c:4527 schedule+0xd0/0x2a0 kernel/sched/core.c:4602 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4661 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x3e2/0x10e0 kernel/locking/mutex.c:1103 __blkdev_get+0x4b8/0x1aa0 fs/block_dev.c:1492 blkdev_get fs/block_dev.c:1639 [inline] blkdev_open+0x227/0x300 fs/block_dev.c:1753 do_dentry_open+0x4b9/0x11b0 fs/open.c:817 do_open fs/namei.c:3251 [inline] path_openat+0x1b9a/0x2730 fs/namei.c:3368 do_filp_open+0x17e/0x3c0 fs/namei.c:3395 do_sys_openat2+0x16d/0x420 fs/open.c:1168 do_sys_open fs/open.c:1184 [inline] __do_sys_open fs/open.c:1192 [inline] __se_sys_open fs/open.c:1188 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1188 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f32e1d2b840 Code: Bad RIP value. RSP: 002b:00007ffc218e5388 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000561757725940 RCX: 00007f32e1d2b840 RDX: 00005617557e9fe3 RSI: 00000000000a0800 RDI: 0000561757739ba0 RBP: 00007ffc218e5500 R08: 00005617557e9670 R09: 0000000000000010 R10: 00005617557e9d0c R11: 0000000000000246 R12: 00007ffc218e5450 R13: 0000561757724cb0 R14: 0000000000000003 R15: 000000000000000e INFO: task syz-executor.3:10875 blocked for more than 143 seconds. Not tainted 5.9.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28552 pid:10875 ppid: 6860 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x8e5/0x21e0 kernel/sched/core.c:4527 schedule+0xd0/0x2a0 kernel/sched/core.c:4602 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4661 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x3e2/0x10e0 kernel/locking/mutex.c:1103 blkdev_put+0x30/0x520 fs/block_dev.c:1804 blkdev_close+0x8c/0xb0 fs/block_dev.c:1853 __fput+0x285/0x920 fs/file_table.c:281 task_work_run+0xdd/0x190 kernel/task_work.c:141 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:140 [inline] exit_to_user_mode_prepare+0x195/0x1c0 kernel/entry/common.c:167 syscall_exit_to_user_mode+0x59/0x2b0 kernel/entry/common.c:242 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d5b9 Code: Bad RIP value. RSP: 002b:00007f3c2f8d2c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: 0000000000000000 RBX: 00000000000129c0 RCX: 000000000045d5b9 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003 RBP: 000000000118cf78 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c R13: 00007fff5413097f R14: 00007f3c2f8d39c0 R15: 000000000118cf4c INFO: task syz-executor.3:10881 blocked for more than 144 seconds. Not tainted 5.9.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:26784 pid:10881 ppid: 6860 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x8e5/0x21e0 kernel/sched/core.c:4527 schedule+0xd0/0x2a0 kernel/sched/core.c:4602 io_schedule+0xb5/0x120 kernel/sched/core.c:6296 wait_on_page_bit_common+0x52c/0xca0 mm/filemap.c:1191 wait_on_page_bit mm/filemap.c:1216 [inline] wait_on_page_locked include/linux/pagemap.h:611 [inline] wait_on_page_read mm/filemap.c:2833 [inline] do_read_cache_page+0x957/0x1390 mm/filemap.c:2876 read_mapping_page include/linux/pagemap.h:437 [inline] read_part_sector+0xf6/0x5af block/partitions/core.c:770 adfspart_check_ICS+0x9d/0xc90 block/partitions/acorn.c:360 check_partition block/partitions/core.c:140 [inline] blk_add_partitions+0x44b/0xe10 block/partitions/core.c:698 bdev_disk_changed+0x1ea/0x370 fs/block_dev.c:1416 __blkdev_get+0xee4/0x1aa0 fs/block_dev.c:1559 blkdev_get fs/block_dev.c:1639 [inline] blkdev_open+0x227/0x300 fs/block_dev.c:1753 do_dentry_open+0x4b9/0x11b0 fs/open.c:817 do_open fs/namei.c:3251 [inline] path_openat+0x1b9a/0x2730 fs/namei.c:3368 do_filp_open+0x17e/0x3c0 fs/namei.c:3395 do_sys_openat2+0x16d/0x420 fs/open.c:1168 do_sys_open fs/open.c:1184 [inline] __do_sys_open fs/open.c:1192 [inline] __se_sys_open fs/open.c:1188 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1188 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x417101 Code: Bad RIP value. RSP: 002b:00007f3c2f8b1bb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f3c2f8b1bd0 RCX: 0000000000417101 RDX: 00007f3c2f8b1bdf RSI: 0000000000000002 RDI: 00007f3c2f8b1bd0 RBP: 000000000118d018 R08: 0000000000000000 R09: 000000000000000f R10: 0000000000000004 R11: 0000000000000293 R12: 000000000118cfec R13: 00007fff5413097f R14: 00007f3c2f8b29c0 R15: 000000000118cfec INFO: task syz-executor.5:10940 blocked for more than 144 seconds. Not tainted 5.9.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:28968 pid:10940 ppid: 6864 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x8e5/0x21e0 kernel/sched/core.c:4527 schedule+0xd0/0x2a0 kernel/sched/core.c:4602 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4661 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x3e2/0x10e0 kernel/locking/mutex.c:1103 iterate_bdevs+0xc4/0x286 fs/block_dev.c:2144 ksys_sync+0xb6/0x150 fs/sync.c:117 __do_sys_sync+0xa/0x10 fs/sync.c:125 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d5b9 Code: Bad RIP value. RSP: 002b:00007fedeca7dc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 0000000000033b00 RCX: 000000000045d5b9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 000000000118cfe0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cfec R13: 00007ffdd0c79dbf R14: 00007fedeca7e9c0 R15: 000000000118cfec INFO: task syz-executor.5:10949 blocked for more than 144 seconds. Not tainted 5.9.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:25552 pid:10949 ppid: 6864 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x8e5/0x21e0 kernel/sched/core.c:4527 schedule+0xd0/0x2a0 kernel/sched/core.c:4602 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4661 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x3e2/0x10e0 kernel/locking/mutex.c:1103 iterate_bdevs+0xc4/0x286 fs/block_dev.c:2144 ksys_sync+0xb6/0x150 fs/sync.c:117 __do_sys_sync+0xa/0x10 fs/sync.c:125 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d5b9 Code: Bad RIP value. RSP: 002b:00007fedeca5cc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 0000000000033b00 RCX: 000000000045d5b9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 000000000118d080 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118d08c R13: 00007ffdd0c79dbf R14: 00007fedeca5d9c0 R15: 000000000118d08c Showing all locks held in the system: 1 lock held by khungtaskd/1166: #0: ffffffff89bd6900 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5825 1 lock held by in:imklog/6537: #0: ffff888097ae10f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:930 1 lock held by systemd-udevd/10745: #0: ffff88808a7e27c0 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x4b8/0x1aa0 fs/block_dev.c:1492 1 lock held by syz-executor.3/10875: #0: ffff88808a7e27c0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x30/0x520 fs/block_dev.c:1804 1 lock held by syz-executor.3/10881: #0: ffff88808a7e27c0 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x4b8/0x1aa0 fs/block_dev.c:1492 1 lock held by syz-executor.5/10940: #0: ffff88808a7e27c0 (&bdev->bd_mutex){+.+.}-{3:3}, at: iterate_bdevs+0xc4/0x286 fs/block_dev.c:2144 1 lock held by syz-executor.5/10949: #0: ffff88808a7e27c0 (&bdev->bd_mutex){+.+.}-{3:3}, at: iterate_bdevs+0xc4/0x286 fs/block_dev.c:2144 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1166 Comm: khungtaskd Not tainted 5.9.0-rc2-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+0x18f/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b3/0x223 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xd7d/0x1000 kernel/hung_task.c:295 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 263 Comm: kworker/u4:5 Not tainted 5.9.0-rc2-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+0x160/0x5640 kernel/locking/lockdep.c:4325 Code: 60 11 97 8c 41 8b b6 e0 08 00 00 48 ba 00 00 00 00 00 fc ff df 48 c1 e9 03 0f b6 0c 11 48 c7 c2 60 11 97 8c 83 e2 07 83 c2 03 <89> 74 24 18 38 ca 7c 08 84 c9 0f 85 7a 13 00 00 83 7c 24 18 2f 8b RSP: 0000:ffffc90001c479c8 EFLAGS: 00000006 RAX: ffffffff8c5f5ce8 RBX: ffffffff89bd6900 RCX: 0000000000000004 RDX: 0000000000000003 RSI: 0000000000000002 RDI: ffffffff89bd6908 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: fffffbfff1564691 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffff8880a86a0100 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00e46e440 CR3: 00000000a8380000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:5005 rcu_lock_acquire include/linux/rcupdate.h:241 [inline] rcu_read_lock include/linux/rcupdate.h:634 [inline] batadv_nc_process_nc_paths.part.0+0xec/0x3b0 net/batman-adv/network-coding.c:686 batadv_nc_process_nc_paths net/batman-adv/network-coding.c:678 [inline] batadv_nc_worker+0xaf2/0xe50 net/batman-adv/network-coding.c:727 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294