INFO: task systemd-udevd:22023 blocked for more than 143 seconds. Not tainted 5.14.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:23952 pid:22023 ppid: 4868 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0xc07/0x11f0 kernel/sched/core.c:5940 schedule+0x14b/0x210 kernel/sched/core.c:6019 io_schedule+0x83/0x100 kernel/sched/core.c:8008 wait_on_page_bit_common+0x9ca/0x1030 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+0x19d/0x430 mm/filemap.c:3312 do_read_cache_page+0xb1b/0xe10 mm/filemap.c:3355 read_mapping_page include/linux/pagemap.h:515 [inline] read_part_sector+0x118/0x500 block/partitions/core.c:726 adfspart_check_ICS+0x9e/0xa40 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+0x764/0x1690 block/partitions/core.c:697 blkdev_get_whole+0x42c/0x500 fs/block_dev.c:1267 blkdev_get_by_dev+0x339/0xdc0 fs/block_dev.c:1415 blkdev_open+0x132/0x2c0 fs/block_dev.c:1510 do_dentry_open+0x7cb/0x1020 fs/open.c:826 do_open fs/namei.c:3374 [inline] path_openat+0x27e7/0x36b0 fs/namei.c:3507 do_filp_open+0x253/0x4d0 fs/namei.c:3534 do_sys_openat2+0x124/0x460 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+0x221/0x270 fs/open.c:1224 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fd08a1ab840 RSP: 002b:00007ffec5fac6f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00005573caf91380 RCX: 00007fd08a1ab840 RDX: 00005573c924efe3 RSI: 00000000000a0800 RDI: 00005573caf91180 RBP: 00007ffec5fac870 R08: 00005573c924e670 R09: 0000000000000010 R10: 00005573c924ed0c R11: 0000000000000246 R12: 00007ffec5fac7c0 R13: 00005573caf90e90 R14: 0000000000000003 R15: 000000000000000e INFO: task syz-executor.4:26124 blocked for more than 143 seconds. Not tainted 5.14.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:26416 pid:26124 ppid: 8455 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0xc07/0x11f0 kernel/sched/core.c:5940 schedule+0x14b/0x210 kernel/sched/core.c:6019 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6078 __mutex_lock_common+0x116f/0x3770 kernel/locking/mutex.c:1036 __mutex_lock kernel/locking/mutex.c:1104 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1119 blkdev_put+0xfc/0x810 fs/block_dev.c:1532 blkdev_close+0x7a/0xa0 fs/block_dev.c:1584 __fput+0x352/0x7b0 fs/file_table.c:280 task_work_run+0x146/0x1c0 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+0x201/0x220 kernel/entry/common.c:209 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:302 do_syscall_64+0x4c/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4193fb RSP: 002b:00007ffc69676bb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00000000004193fb RDX: 0000000000570628 RSI: ffffffff81a66d52 RDI: 0000000000000003 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b337224d8 R10: 000000000000000e R11: 0000000000000293 R12: 000000000007e853 R13: 00000000000003e8 R14: 000000000056bf80 R15: 000000000007e772 Showing all locks held in the system: 3 locks held by kworker/u4:3/176: 3 locks held by kworker/u4:5/244: #0: ffff888011069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x7aa/0x10c0 kernel/workqueue.c:2249 #1: ffffc90001a6fd20 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work+0x7e8/0x10c0 kernel/workqueue.c:2251 #2: ffff8880b9c40098 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x12a/0x270 kernel/time/timer.c:944 1 lock held by khungtaskd/1589: #0: ffffffff8c7177c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 1 lock held by in:imklog/8139: #0: ffff88801de83770 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:974 2 locks held by agetty/8150: #0: ffff88801f27f098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc90000ebc2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b1/0x1c30 drivers/tty/n_tty.c:2113 1 lock held by systemd-udevd/22023: #0: ffff88801eee1d18 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x102/0xdc0 fs/block_dev.c:1408 1 lock held by syz-executor.4/26124: #0: ffff88801eee1d18 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xfc/0x810 fs/block_dev.c:1532 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1589 Comm: khungtaskd Not tainted 5.14.0-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:88 [inline] dump_stack_lvl+0x1d3/0x29f lib/dump_stack.c:105 nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x191/0x2f0 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+0xd06/0xd50 kernel/hung_task.c:295 kthread+0x453/0x480 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4852 Comm: systemd-journal Not tainted 5.14.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:___slab_alloc+0x0/0x350 mm/slub.c:2721 Code: 48 89 ee e8 02 b5 60 02 e9 0c fd ff ff e8 d8 07 10 08 49 89 dc 44 8b 74 24 04 41 c1 ee 08 41 83 e6 01 48 89 e9 e9 b9 fe ff ff <55> 41 57 41 56 41 55 41 54 53 48 83 ec 10 4d 89 c6 48 89 4c 24 08 RSP: 0018:ffffc900012ffc80 EFLAGS: 00000086 RAX: 0000000000000000 RBX: ffff8880b9c57390 RCX: ffffffff81d6d92a RDX: 00000000ffffffff RSI: 0000000000000cc0 RDI: ffff888140007500 RBP: 0000000000000000 R08: ffff8880b9c57390 R09: fffffbfff1b746be R10: fffffbfff1b746be R11: 0000000000000000 R12: 0000000000000246 R13: 0000000000000000 R14: ffff888140007500 R15: 0000000000000cc0 FS: 00007f8f01b208c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8eff3a6000 CR3: 0000000013faf000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __slab_alloc mm/slub.c:2840 [inline] slab_alloc_node mm/slub.c:2922 [inline] slab_alloc mm/slub.c:2964 [inline] kmem_cache_alloc+0x299/0x340 mm/slub.c:2969 getname_flags+0xba/0x640 fs/namei.c:138 do_sys_openat2+0xba/0x460 fs/open.c:1198 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+0x221/0x270 fs/open.c:1224 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f8f010af840 Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 RSP: 002b:00007ffe152871a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007ffe152874b0 RCX: 00007f8f010af840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 00005642009f2cd0 RBP: 000000000000000d R08: 0000000000000000 R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 00005642009e6040 R14: 00007ffe15287470 R15: 00005642009f2d20