bisecting fixing commit since a1b8638ba1320e6684aa98233c15255eb803fac7 building syzkaller on 6bfdbe8950b22b1c832478bd397754f3108df040 testing commit a1b8638ba1320e6684aa98233c15255eb803fac7 with gcc (GCC) 8.1.0 kernel signature: 04fe529a62a183284ade7f46b0b29c39da43143a1c22da75c57cc3e7b91f0bab run #0: boot failed: create image operation failed: &{Code:ZONE_RESOURCE_POOL_EXHAUSTED_WITH_DETAILS Location: Message:The zone 'projects/syzkaller/zones/us-central1-c' does not have enough resources available to fulfill the request. '(resource type:compute)'. ForceSendFields:[] NullFields:[]}. run #1: boot failed: create image operation failed: &{Code:ZONE_RESOURCE_POOL_EXHAUSTED_WITH_DETAILS Location: Message:The zone 'projects/syzkaller/zones/us-central1-c' does not have enough resources available to fulfill the request. '(resource type:compute)'. ForceSendFields:[] NullFields:[]}. run #2: boot failed: create image operation failed: &{Code:ZONE_RESOURCE_POOL_EXHAUSTED_WITH_DETAILS Location: Message:The zone 'projects/syzkaller/zones/us-central1-c' does not have enough resources available to fulfill the request. '(resource type:compute)'. ForceSendFields:[] NullFields:[]}. run #3: boot failed: create image operation failed: &{Code:ZONE_RESOURCE_POOL_EXHAUSTED_WITH_DETAILS Location: Message:The zone 'projects/syzkaller/zones/us-central1-c' does not have enough resources available to fulfill the request. '(resource type:compute)'. ForceSendFields:[] NullFields:[]}. run #4: crashed: INFO: task hung in blkdev_put run #5: crashed: INFO: task hung in blkdev_put run #6: crashed: INFO: task hung in blkdev_put run #7: crashed: INFO: task hung in blkdev_put run #8: crashed: INFO: task hung in blkdev_put run #9: crashed: INFO: task hung in blkdev_put testing current HEAD 467f8165a2b0e6accf3d0dd9c8089b1dbde29f7f testing commit 467f8165a2b0e6accf3d0dd9c8089b1dbde29f7f with gcc (GCC) 8.1.0 kernel signature: 578d2bc28777fcefca1e5d71f85151526f257373ea463ebf0d242ec86a6db323 all runs: crashed: INFO: task hung in blkdev_put revisions tested: 2, total time: 23m18.055055901s (build: 9m38.086583509s, test: 13m6.697432502s) the crash still happens on HEAD commit msg: Merge tag 'close-range-cloexec-unshare-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux crash: INFO: task hung in blkdev_put INFO: task syz-executor.0:7565 blocked for more than 143 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:14008 pid: 7565 ppid: 6138 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x429/0x9b0 kernel/sched/core.c:5078 schedule+0x38/0xe0 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x4af/0xa30 kernel/locking/mutex.c:1103 blkdev_put+0x23/0x140 fs/block_dev.c:1582 blkdev_close+0x1f/0x30 fs/block_dev.c:1631 __fput+0xa1/0x250 fs/file_table.c:280 task_work_run+0x68/0xb0 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x229/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x40/0x80 kernel/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x417901 RSP: 002b:00007ffc25f5e160 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000417901 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffc25f5e250 R11: 0000000000000293 R12: 000000000118d9c0 R13: 000000000118d9c0 R14: ffffffffffffffff R15: 000000000118cf4c INFO: task syz-executor.0:7566 blocked for more than 143 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:14008 pid: 7566 ppid: 6138 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x429/0x9b0 kernel/sched/core.c:5078 schedule+0x38/0xe0 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x4af/0xa30 kernel/locking/mutex.c:1103 blkdev_put+0x23/0x140 fs/block_dev.c:1582 blkdev_close+0x1f/0x30 fs/block_dev.c:1631 __fput+0xa1/0x250 fs/file_table.c:280 task_work_run+0x68/0xb0 kernel/task_work.c:140 exit_task_work include/linux/task_work.h:30 [inline] do_exit+0x42f/0xd20 kernel/exit.c:823 do_group_exit+0x42/0xb0 kernel/exit.c:920 get_signal+0x155/0xd60 kernel/signal.c:2770 arch_do_signal_or_restart+0xaa/0x8f0 arch/x86/kernel/signal.c:811 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x1b7/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x40/0x80 kernel/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e179 RSP: 002b:00007f7487df6c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: fffffffffffffe00 RBX: 0000000000012fc0 RCX: 000000000045e179 RDX: ffffffffffffffff RSI: 000000000000ab03 RDI: 0000000000000003 RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c R13: 00007ffc25f5e0ef R14: 00007f7487df79c0 R15: 000000000118cf4c INFO: task systemd-udevd:7569 blocked for more than 143 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:13448 pid: 7569 ppid: 3572 flags:0x00004024 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x429/0x9b0 kernel/sched/core.c:5078 schedule+0x38/0xe0 kernel/sched/core.c:5157 io_schedule+0xd/0x40 kernel/sched/core.c:6852 wait_on_page_bit_common+0x398/0x410 mm/filemap.c:1273 wait_on_page_bit mm/filemap.c:1334 [inline] wait_on_page_locked include/linux/pagemap.h:674 [inline] wait_on_page_read mm/filemap.c:3061 [inline] do_read_cache_page+0x275/0x3f0 mm/filemap.c:3104 read_mapping_page include/linux/pagemap.h:500 [inline] read_part_sector+0x40/0x150 block/partitions/core.c:692 adfspart_check_ICS+0x2d/0x3a0 block/partitions/acorn.c:360 check_partition block/partitions/core.c:147 [inline] blk_add_partitions+0x163/0x470 block/partitions/core.c:620 bdev_disk_changed+0x6c/0xf0 fs/block_dev.c:1250 __blkdev_get+0x101/0x290 fs/block_dev.c:1332 blkdev_get_by_dev+0xfa/0x200 fs/block_dev.c:1436 blkdev_open+0x59/0xa0 fs/block_dev.c:1533 do_dentry_open+0x15a/0x3c0 fs/open.c:817 do_open fs/namei.c:3252 [inline] path_openat+0x490/0xac0 fs/namei.c:3369 do_filp_open+0x8e/0x100 fs/namei.c:3396 do_sys_openat2+0x229/0x2e0 fs/open.c:1172 do_sys_open+0x46/0x80 fs/open.c:1188 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f63156eb840 RSP: 002b:00007fff970b1758 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 000055ed4f1b1530 RCX: 00007f63156eb840 RDX: 000055ed4e871fe3 RSI: 00000000000a0800 RDI: 000055ed4f1b0280 RBP: 00007fff970b18d0 R08: 000055ed4e871670 R09: 0000000000000010 R10: 00007f6315465d70 R11: 0000000000000246 R12: 00007fff970b1820 R13: 000055ed4f1ab6b0 R14: 0000000000000003 R15: 000000000000000e INFO: task systemd-udevd:7579 blocked for more than 144 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:13448 pid: 7579 ppid: 3572 flags:0x00004024 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x429/0x9b0 kernel/sched/core.c:5078 schedule+0x38/0xe0 kernel/sched/core.c:5157 io_schedule+0xd/0x40 kernel/sched/core.c:6852 wait_on_page_bit_common+0x398/0x410 mm/filemap.c:1273 wait_on_page_bit mm/filemap.c:1334 [inline] wait_on_page_locked include/linux/pagemap.h:674 [inline] wait_on_page_read mm/filemap.c:3061 [inline] do_read_cache_page+0x275/0x3f0 mm/filemap.c:3104 read_mapping_page include/linux/pagemap.h:500 [inline] read_part_sector+0x40/0x150 block/partitions/core.c:692 adfspart_check_ICS+0x2d/0x3a0 block/partitions/acorn.c:360 check_partition block/partitions/core.c:147 [inline] blk_add_partitions+0x163/0x470 block/partitions/core.c:620 bdev_disk_changed+0x6c/0xf0 fs/block_dev.c:1250 __blkdev_get+0x101/0x290 fs/block_dev.c:1332 blkdev_get_by_dev+0xfa/0x200 fs/block_dev.c:1436 blkdev_open+0x59/0xa0 fs/block_dev.c:1533 do_dentry_open+0x15a/0x3c0 fs/open.c:817 do_open fs/namei.c:3252 [inline] path_openat+0x490/0xac0 fs/namei.c:3369 do_filp_open+0x8e/0x100 fs/namei.c:3396 do_sys_openat2+0x229/0x2e0 fs/open.c:1172 do_sys_open+0x46/0x80 fs/open.c:1188 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f63156eb840 RSP: 002b:00007fff970b1168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 000055ed4f1b0210 RCX: 00007f63156eb840 RDX: 000055ed4e871fe3 RSI: 00000000000a0800 RDI: 000055ed4f1a1830 RBP: 00007fff970b12e0 R08: 000055ed4e871670 R09: 0000000000000010 R10: 00007f6315465d70 R11: 0000000000000246 R12: 00007fff970b1230 R13: 000055ed4f1ab490 R14: 0000000000000003 R15: 000000000000000e INFO: task systemd-udevd:7580 blocked for more than 144 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:13448 pid: 7580 ppid: 3572 flags:0x00004024 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x429/0x9b0 kernel/sched/core.c:5078 schedule+0x38/0xe0 kernel/sched/core.c:5157 io_schedule+0xd/0x40 kernel/sched/core.c:6852 wait_on_page_bit_common+0x398/0x410 mm/filemap.c:1273 wait_on_page_bit mm/filemap.c:1334 [inline] wait_on_page_locked include/linux/pagemap.h:674 [inline] wait_on_page_read mm/filemap.c:3061 [inline] do_read_cache_page+0x275/0x3f0 mm/filemap.c:3104 read_mapping_page include/linux/pagemap.h:500 [inline] read_part_sector+0x40/0x150 block/partitions/core.c:692 adfspart_check_ICS+0x2d/0x3a0 block/partitions/acorn.c:360 check_partition block/partitions/core.c:147 [inline] blk_add_partitions+0x163/0x470 block/partitions/core.c:620 bdev_disk_changed+0x6c/0xf0 fs/block_dev.c:1250 __blkdev_get+0x101/0x290 fs/block_dev.c:1332 blkdev_get_by_dev+0xfa/0x200 fs/block_dev.c:1436 blkdev_open+0x59/0xa0 fs/block_dev.c:1533 do_dentry_open+0x15a/0x3c0 fs/open.c:817 do_open fs/namei.c:3252 [inline] path_openat+0x490/0xac0 fs/namei.c:3369 do_filp_open+0x8e/0x100 fs/namei.c:3396 do_sys_openat2+0x229/0x2e0 fs/open.c:1172 do_sys_open+0x46/0x80 fs/open.c:1188 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f63156eb840 RSP: 002b:00007fff970b1758 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 000055ed4f1b0210 RCX: 00007f63156eb840 RDX: 000055ed4e871fe3 RSI: 00000000000a0800 RDI: 000055ed4f1a89e0 RBP: 00007fff970b18d0 R08: 000055ed4e871670 R09: 0000000000000010 R10: 00007f6315465d70 R11: 0000000000000246 R12: 00007fff970b1820 R13: 000055ed4f1a8a40 R14: 0000000000000003 R15: 000000000000000e INFO: task syz-executor.2:7592 blocked for more than 144 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:14008 pid: 7592 ppid: 6147 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x429/0x9b0 kernel/sched/core.c:5078 schedule+0x38/0xe0 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x4af/0xa30 kernel/locking/mutex.c:1103 blkdev_put+0x23/0x140 fs/block_dev.c:1582 blkdev_close+0x1f/0x30 fs/block_dev.c:1631 __fput+0xa1/0x250 fs/file_table.c:280 task_work_run+0x68/0xb0 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x229/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x40/0x80 kernel/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x417901 RSP: 002b:00007ffc3453c4f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000417901 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffc3453c5e0 R11: 0000000000000293 R12: 000000000118d9c0 R13: 000000000118d9c0 R14: ffffffffffffffff R15: 000000000118cf4c INFO: task syz-executor.2:7593 blocked for more than 144 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:14008 pid: 7593 ppid: 6147 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x429/0x9b0 kernel/sched/core.c:5078 schedule+0x38/0xe0 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x4af/0xa30 kernel/locking/mutex.c:1103 blkdev_put+0x23/0x140 fs/block_dev.c:1582 blkdev_close+0x1f/0x30 fs/block_dev.c:1631 __fput+0xa1/0x250 fs/file_table.c:280 task_work_run+0x68/0xb0 kernel/task_work.c:140 exit_task_work include/linux/task_work.h:30 [inline] do_exit+0x42f/0xd20 kernel/exit.c:823 do_group_exit+0x42/0xb0 kernel/exit.c:920 get_signal+0x155/0xd60 kernel/signal.c:2770 arch_do_signal_or_restart+0xaa/0x8f0 arch/x86/kernel/signal.c:811 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x1b7/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x40/0x80 kernel/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e179 RSP: 002b:00007fb1cab8fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: fffffffffffffe00 RBX: 0000000000012fc0 RCX: 000000000045e179 RDX: ffffffffffffffff RSI: 000000000000ab03 RDI: 0000000000000003 RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c R13: 00007ffc3453c47f R14: 00007fb1cab909c0 R15: 000000000118cf4c INFO: task syz-executor.5:7596 blocked for more than 144 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:14008 pid: 7596 ppid: 6146 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x429/0x9b0 kernel/sched/core.c:5078 schedule+0x38/0xe0 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x4af/0xa30 kernel/locking/mutex.c:1103 blkdev_put+0x23/0x140 fs/block_dev.c:1582 blkdev_close+0x1f/0x30 fs/block_dev.c:1631 __fput+0xa1/0x250 fs/file_table.c:280 task_work_run+0x68/0xb0 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x229/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x40/0x80 kernel/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x417901 RSP: 002b:00007ffe637e32f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000417901 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffe637e33e0 R11: 0000000000000293 R12: 000000000118d9c0 R13: 000000000118d9c0 R14: ffffffffffffffff R15: 000000000118cf4c INFO: task syz-executor.5:7597 blocked for more than 145 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:13664 pid: 7597 ppid: 6146 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x429/0x9b0 kernel/sched/core.c:5078 schedule+0x38/0xe0 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x4af/0xa30 kernel/locking/mutex.c:1103 blkdev_put+0x23/0x140 fs/block_dev.c:1582 blkdev_close+0x1f/0x30 fs/block_dev.c:1631 __fput+0xa1/0x250 fs/file_table.c:280 task_work_run+0x68/0xb0 kernel/task_work.c:140 exit_task_work include/linux/task_work.h:30 [inline] do_exit+0x42f/0xd20 kernel/exit.c:823 do_group_exit+0x42/0xb0 kernel/exit.c:920 get_signal+0x155/0xd60 kernel/signal.c:2770 arch_do_signal_or_restart+0xaa/0x8f0 arch/x86/kernel/signal.c:811 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x1b7/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x40/0x80 kernel/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e179 RSP: 002b:00007f0efcac4c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: fffffffffffffe00 RBX: 0000000000012fc0 RCX: 000000000045e179 RDX: ffffffffffffffff RSI: 000000000000ab03 RDI: 0000000000000003 RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c R13: 00007ffe637e327f R14: 00007f0efcac59c0 R15: 000000000118cf4c INFO: task systemd-udevd:7601 blocked for more than 145 seconds. Not tainted 5.10.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:13424 pid: 7601 ppid: 3572 flags:0x00004024 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x429/0x9b0 kernel/sched/core.c:5078 schedule+0x38/0xe0 kernel/sched/core.c:5157 io_schedule+0xd/0x40 kernel/sched/core.c:6852 wait_on_page_bit_common+0x398/0x410 mm/filemap.c:1273 wait_on_page_bit mm/filemap.c:1334 [inline] wait_on_page_locked include/linux/pagemap.h:674 [inline] wait_on_page_read mm/filemap.c:3061 [inline] do_read_cache_page+0x275/0x3f0 mm/filemap.c:3104 read_mapping_page include/linux/pagemap.h:500 [inline] read_part_sector+0x40/0x150 block/partitions/core.c:692 adfspart_check_ICS+0x2d/0x3a0 block/partitions/acorn.c:360 check_partition block/partitions/core.c:147 [inline] blk_add_partitions+0x163/0x470 block/partitions/core.c:620 bdev_disk_changed+0x6c/0xf0 fs/block_dev.c:1250 __blkdev_get+0x101/0x290 fs/block_dev.c:1332 blkdev_get_by_dev+0xfa/0x200 fs/block_dev.c:1436 blkdev_open+0x59/0xa0 fs/block_dev.c:1533 do_dentry_open+0x15a/0x3c0 fs/open.c:817 do_open fs/namei.c:3252 [inline] path_openat+0x490/0xac0 fs/namei.c:3369 do_filp_open+0x8e/0x100 fs/namei.c:3396 do_sys_openat2+0x229/0x2e0 fs/open.c:1172 do_sys_open+0x46/0x80 fs/open.c:1188 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f63156eb840 RSP: 002b:00007fff970b1168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 000055ed4f1b0210 RCX: 00007f63156eb840 RDX: 000055ed4e871fe3 RSI: 00000000000a0800 RDI: 000055ed4f1aad60 RBP: 00007fff970b12e0 R08: 000055ed4e871670 R09: 0000000000000010 R10: 00007f6315465d70 R11: 0000000000000246 R12: 00007fff970b1230 R13: 000055ed4f1aa480 R14: 0000000000000003 R15: 000000000000000e Showing all locks held in the system: 1 lock held by khungtaskd/987: #0: ffffffff84a113e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x15/0x1a6 kernel/locking/lockdep.c:6255 1 lock held by in:imklog/5713: 1 lock held by syz-executor.0/7565: #0: ffff888103b9f460 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x23/0x140 fs/block_dev.c:1582 1 lock held by syz-executor.0/7566: #0: ffff888103b9f460 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x23/0x140 fs/block_dev.c:1582 1 lock held by systemd-udevd/7569: #0: ffff888103b9f460 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xee/0x200 fs/block_dev.c:1435 1 lock held by systemd-udevd/7579: #0: ffff888104c050e0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xee/0x200 fs/block_dev.c:1435 1 lock held by systemd-udevd/7580: #0: ffff888103bc74e0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xee/0x200 fs/block_dev.c:1435 1 lock held by syz-executor.2/7592: #0: ffff888103bc74e0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x23/0x140 fs/block_dev.c:1582 1 lock held by syz-executor.2/7593: #0: ffff888103bc74e0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x23/0x140 fs/block_dev.c:1582 1 lock held by syz-executor.5/7596: #0: ffff888104c050e0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x23/0x140 fs/block_dev.c:1582 1 lock held by syz-executor.5/7597: #0: ffff888104c050e0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x23/0x140 fs/block_dev.c:1582 1 lock held by systemd-udevd/7601: #0: ffff888103bb44a0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xee/0x200 fs/block_dev.c:1435 1 lock held by syz-executor.1/7602: #0: ffff888103bb44a0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x23/0x140 fs/block_dev.c:1582 1 lock held by syz-executor.1/7603: #0: ffff888103bb44a0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x23/0x140 fs/block_dev.c:1582 1 lock held by syz-executor.3/7606: #0: ffff888103bdc520 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x23/0x140 fs/block_dev.c:1582 1 lock held by syz-executor.3/7607: #0: ffff888103bdc520 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x23/0x140 fs/block_dev.c:1582 1 lock held by systemd-udevd/7610: #0: ffff888103bdc520 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xee/0x200 fs/block_dev.c:1435 1 lock held by syz-executor.4/7611: #0: ffff888103bf00a0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x23/0x140 fs/block_dev.c:1582 1 lock held by syz-executor.4/7612: #0: ffff888103bf00a0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x23/0x140 fs/block_dev.c:1582 1 lock held by systemd-udevd/7615: #0: ffff888103bf00a0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xee/0x200 fs/block_dev.c:1435 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 987 Comm: khungtaskd Not tainted 5.10.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa3/0xc8 lib/dump_stack.c:120 nmi_cpu_backtrace.cold.8+0x68/0x82 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0xd5/0xf0 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+0x5f1/0x6f0 kernel/hung_task.c:294 kthread+0x145/0x170 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60