INFO: task systemd-udevd:16751 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:26528 pid:16751 ppid: 4870 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: 0033:0x7fe96b6b1840 RSP: 002b:00007ffd51e132b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000561836555a00 RCX: 00007fe96b6b1840 RDX: 00005618358d0fe3 RSI: 00000000000a0800 RDI: 00005618365579a0 RBP: 00007ffd51e13430 R08: 00005618358d0670 R09: 0000000000000010 R10: 00007fe96b42bd70 R11: 0000000000000246 R12: 00007ffd51e13380 R13: 0000561836543310 R14: 0000000000000003 R15: 000000000000000e INFO: task systemd-udevd:16755 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:26528 pid:16755 ppid: 4870 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: 0033:0x7fe96b6b1840 RSP: 002b:00007ffd51e132b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000561836555a00 RCX: 00007fe96b6b1840 RDX: 00005618358d0fe3 RSI: 00000000000a0800 RDI: 0000561836544d10 RBP: 00007ffd51e13430 R08: 00005618358d0670 R09: 0000000000000010 R10: 00007fe96b42bd70 R11: 0000000000000246 R12: 00007ffd51e13380 R13: 0000561836541880 R14: 0000000000000003 R15: 000000000000000e INFO: task syz-executor.0:17288 blocked for more than 144 seconds. Not tainted 5.14.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:28176 pid:17288 ppid: 8469 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:00007ffcede81030 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00000000004193fb RDX: 0000000000570488 RSI: 00000000000f4240 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000570430 R10: 00007ffcedf55090 R11: 0000000000000293 R12: 0000000000074bb8 R13: 00000000000003e8 R14: 000000000056bf80 R15: 0000000000074ab2 INFO: task syz-executor.2:17338 blocked for more than 144 seconds. Not tainted 5.14.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:28176 pid:17338 ppid: 8473 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:00007ffe09151d30 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00000000004193fb RDX: 0000001b2d423d70 RSI: ffffffff81358282 RDI: 0000000000000003 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2d423204 R10: 000000000000027b R11: 0000000000000293 R12: 000000000056cb00 R13: 000000000056cb00 R14: 000000000056bf80 R15: 0000000000074c92 Showing all locks held in the system: 1 lock held by khungtaskd/1584: #0: ffffffff8b97b9c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 1 lock held by in:imklog/8140: #0: ffff8880336ec5f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:974 1 lock held by systemd-udevd/16751: #0: ffff88801e52cd18 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9d/0xdd0 fs/block_dev.c:1408 1 lock held by systemd-udevd/16755: #0: ffff88801e52f518 (&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.0/17288: #0: ffff88801e52cd18 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xa0/0xae0 fs/block_dev.c:1532 1 lock held by syz-executor.2/17338: #0: ffff88801e52f518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xa0/0xae0 fs/block_dev.c:1532 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1584 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+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: 29 Comm: kworker/u4:2 Not tainted 5.14.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline] RIP: 0010:smp_call_function_many_cond+0x452/0xc20 kernel/smp.c:967 Code: 0b 00 85 ed 74 4d 48 b8 00 00 00 00 00 fc ff df 4d 89 f4 4c 89 f5 49 c1 ec 03 83 e5 07 49 01 c4 83 c5 03 e8 40 48 0b 00 f3 90 <41> 0f b6 04 24 40 38 c5 7c 08 84 c0 0f 85 33 06 00 00 8b 43 08 31 RSP: 0018:ffffc90000e3fa00 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffff8880b9c58880 RCX: 0000000000000000 RDX: ffff888011bb0000 RSI: ffffffff816a4090 RDI: 0000000000000003 RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff816a40b6 R11: 0000000000000000 R12: ffffed101738b111 R13: 0000000000000000 R14: ffff8880b9c58888 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0b252e1000 CR3: 000000000b68e000 CR4: 0000000000350ee0 Call Trace: on_each_cpu_cond_mask+0x56/0xa0 kernel/smp.c:1133 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:929 [inline] text_poke_bp_batch+0x47d/0x560 arch/x86/kernel/alternative.c:1183 text_poke_flush arch/x86/kernel/alternative.c:1268 [inline] text_poke_flush arch/x86/kernel/alternative.c:1265 [inline] text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1275 arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:145 jump_label_update+0x1d5/0x430 kernel/jump_label.c:830 static_key_enable_cpuslocked+0x1b1/0x260 kernel/jump_label.c:177 static_key_enable+0x16/0x20 kernel/jump_label.c:190 toggle_allocation_gate mm/kfence/core.c:623 [inline] toggle_allocation_gate+0x100/0x390 mm/kfence/core.c:615 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