INFO: task syz-executor.0:8367 blocked for more than 143 seconds. Not tainted 5.10.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:14008 pid: 8367 ppid: 7000 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:3774 [inline] __schedule+0x418/0x900 kernel/sched/core.c:4523 schedule+0x38/0xe0 kernel/sched/core.c:4601 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4660 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x472/0x9f0 kernel/locking/mutex.c:1103 blkdev_put+0x18/0x130 fs/block_dev.c:1802 blkdev_close+0x1f/0x30 fs/block_dev.c:1851 __fput+0xaa/0x250 fs/file_table.c:281 task_work_run+0x68/0xb0 kernel/task_work.c:151 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0x211/0x220 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x7a/0x2c0 kernel/entry/common.c:266 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x417901 Code: Unable to access opcode bytes at RIP 0x4178d7. RSP: 002b:00007ffeab57ccf0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000417901 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffeab57cde0 R11: 0000000000000293 R12: 000000000118d9c0 R13: 000000000118d9c0 R14: ffffffffffffffff R15: 000000000118cf4c INFO: task syz-executor.0:8378 blocked for more than 143 seconds. Not tainted 5.10.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:14008 pid: 8378 ppid: 7000 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:3774 [inline] __schedule+0x418/0x900 kernel/sched/core.c:4523 schedule+0x38/0xe0 kernel/sched/core.c:4601 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4660 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x472/0x9f0 kernel/locking/mutex.c:1103 blkdev_put+0x18/0x130 fs/block_dev.c:1802 blkdev_close+0x1f/0x30 fs/block_dev.c:1851 __fput+0xaa/0x250 fs/file_table.c:281 task_work_run+0x68/0xb0 kernel/task_work.c:151 get_signal+0x600/0xc70 kernel/signal.c:2561 arch_do_signal+0x2b/0x900 arch/x86/kernel/signal.c:811 exit_to_user_mode_loop kernel/entry/common.c:161 [inline] exit_to_user_mode_prepare+0x1a2/0x220 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x7a/0x2c0 kernel/entry/common.c:266 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e179 Code: Unable to access opcode bytes at RIP 0x45e14f. RSP: 002b:00007f7f9d746c78 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: 00007ffeab57cc7f R14: 00007f7f9d7479c0 R15: 000000000118cf4c INFO: task syz-executor.2:8385 blocked for more than 143 seconds. Not tainted 5.10.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:14008 pid: 8385 ppid: 6992 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:3774 [inline] __schedule+0x418/0x900 kernel/sched/core.c:4523 schedule+0x38/0xe0 kernel/sched/core.c:4601 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4660 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x472/0x9f0 kernel/locking/mutex.c:1103 blkdev_put+0x18/0x130 fs/block_dev.c:1802 blkdev_close+0x1f/0x30 fs/block_dev.c:1851 __fput+0xaa/0x250 fs/file_table.c:281 task_work_run+0x68/0xb0 kernel/task_work.c:151 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0x211/0x220 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x7a/0x2c0 kernel/entry/common.c:266 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x417901 Code: Unable to access opcode bytes at RIP 0x4178d7. RSP: 002b:00007ffcc9690140 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000417901 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffcc9690230 R11: 0000000000000293 R12: 000000000118d9c0 R13: 000000000118d9c0 R14: ffffffffffffffff R15: 000000000118cf4c INFO: task syz-executor.2:8389 blocked for more than 143 seconds. Not tainted 5.10.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:14008 pid: 8389 ppid: 6992 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:3774 [inline] __schedule+0x418/0x900 kernel/sched/core.c:4523 schedule+0x38/0xe0 kernel/sched/core.c:4601 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4660 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x472/0x9f0 kernel/locking/mutex.c:1103 blkdev_put+0x18/0x130 fs/block_dev.c:1802 blkdev_close+0x1f/0x30 fs/block_dev.c:1851 __fput+0xaa/0x250 fs/file_table.c:281 task_work_run+0x68/0xb0 kernel/task_work.c:151 get_signal+0x600/0xc70 kernel/signal.c:2561 arch_do_signal+0x2b/0x900 arch/x86/kernel/signal.c:811 exit_to_user_mode_loop kernel/entry/common.c:161 [inline] exit_to_user_mode_prepare+0x1a2/0x220 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x7a/0x2c0 kernel/entry/common.c:266 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e179 Code: Unable to access opcode bytes at RIP 0x45e14f. RSP: 002b:00007fa7e8ac3c78 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: 00007ffcc96900cf R14: 00007fa7e8ac49c0 R15: 000000000118cf4c INFO: task systemd-udevd:8395 blocked for more than 144 seconds. Not tainted 5.10.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:13528 pid: 8395 ppid: 3939 flags:0x00004100 Call Trace: context_switch kernel/sched/core.c:3774 [inline] __schedule+0x418/0x900 kernel/sched/core.c:4523 schedule+0x38/0xe0 kernel/sched/core.c:4601 io_schedule+0xd/0x40 kernel/sched/core.c:6295 wait_on_page_bit_common+0x2a3/0x400 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:2963 [inline] do_read_cache_page+0x275/0x3f0 mm/filemap.c:3006 read_mapping_page include/linux/pagemap.h:500 [inline] read_part_sector+0x31/0x140 block/partitions/core.c:780 adfspart_check_ICS+0x2d/0x3a0 block/partitions/acorn.c:360 check_partition block/partitions/core.c:140 [inline] blk_add_partitions+0x187/0x460 block/partitions/core.c:708 bdev_disk_changed+0x79/0x100 fs/block_dev.c:1417 __blkdev_get+0x305/0x6c0 fs/block_dev.c:1546 blkdev_get+0x3b/0xb0 fs/block_dev.c:1634 do_dentry_open+0x15a/0x3c0 fs/open.c:817 do_open fs/namei.c:3252 [inline] path_openat+0x47d/0xa90 fs/namei.c:3369 do_filp_open+0x8e/0x100 fs/namei.c:3396 do_sys_openat2+0x219/0x2d0 fs/open.c:1168 do_sys_open+0x46/0x80 fs/open.c:1184 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f30d3892840 Code: Unable to access opcode bytes at RIP 0x7f30d3892816. RSP: 002b:00007ffd16dcff88 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00005569710a8040 RCX: 00007f30d3892840 RDX: 000055696f22cfe3 RSI: 00000000000a0800 RDI: 00005569710a5870 RBP: 00007ffd16dd0100 R08: 000055696f22c670 R09: 0000000000000010 R10: 000055696f22cd0c R11: 0000000000000246 R12: 00007ffd16dd0050 R13: 00005569710939c0 R14: 0000000000000003 R15: 000000000000000e INFO: task systemd-udevd:8396 blocked for more than 144 seconds. Not tainted 5.10.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:13528 pid: 8396 ppid: 3939 flags:0x00004100 Call Trace: context_switch kernel/sched/core.c:3774 [inline] __schedule+0x418/0x900 kernel/sched/core.c:4523 schedule+0x38/0xe0 kernel/sched/core.c:4601 io_schedule+0xd/0x40 kernel/sched/core.c:6295 wait_on_page_bit_common+0x2a3/0x400 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:2963 [inline] do_read_cache_page+0x275/0x3f0 mm/filemap.c:3006 read_mapping_page include/linux/pagemap.h:500 [inline] read_part_sector+0x31/0x140 block/partitions/core.c:780 adfspart_check_ICS+0x2d/0x3a0 block/partitions/acorn.c:360 check_partition block/partitions/core.c:140 [inline] blk_add_partitions+0x187/0x460 block/partitions/core.c:708 bdev_disk_changed+0x79/0x100 fs/block_dev.c:1417 __blkdev_get+0x305/0x6c0 fs/block_dev.c:1546 blkdev_get+0x3b/0xb0 fs/block_dev.c:1634 do_dentry_open+0x15a/0x3c0 fs/open.c:817 do_open fs/namei.c:3252 [inline] path_openat+0x47d/0xa90 fs/namei.c:3369 do_filp_open+0x8e/0x100 fs/namei.c:3396 do_sys_openat2+0x219/0x2d0 fs/open.c:1168 do_sys_open+0x46/0x80 fs/open.c:1184 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f30d3892840 Code: Unable to access opcode bytes at RIP 0x7f30d3892816. RSP: 002b:00007ffd16dcff88 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00005569710a63b0 RCX: 00007f30d3892840 RDX: 000055696f22cfe3 RSI: 00000000000a0800 RDI: 00005569710a8130 RBP: 00007ffd16dd0100 R08: 000055696f22c670 R09: 0000000000000010 R10: 000055696f22cd0c R11: 0000000000000246 R12: 00007ffd16dd0050 R13: 00005569710a6730 R14: 0000000000000003 R15: 000000000000000e INFO: task systemd-udevd:8398 blocked for more than 144 seconds. Not tainted 5.10.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:13528 pid: 8398 ppid: 3939 flags:0x00004100 Call Trace: context_switch kernel/sched/core.c:3774 [inline] __schedule+0x418/0x900 kernel/sched/core.c:4523 schedule+0x38/0xe0 kernel/sched/core.c:4601 io_schedule+0xd/0x40 kernel/sched/core.c:6295 wait_on_page_bit_common+0x2a3/0x400 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:2963 [inline] do_read_cache_page+0x275/0x3f0 mm/filemap.c:3006 read_mapping_page include/linux/pagemap.h:500 [inline] read_part_sector+0x31/0x140 block/partitions/core.c:780 adfspart_check_ICS+0x2d/0x3a0 block/partitions/acorn.c:360 check_partition block/partitions/core.c:140 [inline] blk_add_partitions+0x187/0x460 block/partitions/core.c:708 bdev_disk_changed+0x79/0x100 fs/block_dev.c:1417 __blkdev_get+0x305/0x6c0 fs/block_dev.c:1546 blkdev_get+0x3b/0xb0 fs/block_dev.c:1634 do_dentry_open+0x15a/0x3c0 fs/open.c:817 do_open fs/namei.c:3252 [inline] path_openat+0x47d/0xa90 fs/namei.c:3369 do_filp_open+0x8e/0x100 fs/namei.c:3396 do_sys_openat2+0x219/0x2d0 fs/open.c:1168 do_sys_open+0x46/0x80 fs/open.c:1184 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f30d3892840 Code: Unable to access opcode bytes at RIP 0x7f30d3892816. RSP: 002b:00007ffd16dcff88 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00005569710a63b0 RCX: 00007f30d3892840 RDX: 000055696f22cfe3 RSI: 00000000000a0800 RDI: 00005569710a35d0 RBP: 00007ffd16dd0100 R08: 000055696f22c670 R09: 0000000000000010 R10: 000055696f22cd0c R11: 0000000000000246 R12: 00007ffd16dd0050 R13: 00005569710a3160 R14: 0000000000000003 R15: 000000000000000e INFO: task systemd-udevd:8428 blocked for more than 144 seconds. Not tainted 5.10.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:13528 pid: 8428 ppid: 3939 flags:0x00004100 Call Trace: context_switch kernel/sched/core.c:3774 [inline] __schedule+0x418/0x900 kernel/sched/core.c:4523 schedule+0x38/0xe0 kernel/sched/core.c:4601 io_schedule+0xd/0x40 kernel/sched/core.c:6295 wait_on_page_bit_common+0x2a3/0x400 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:2963 [inline] do_read_cache_page+0x275/0x3f0 mm/filemap.c:3006 read_mapping_page include/linux/pagemap.h:500 [inline] read_part_sector+0x31/0x140 block/partitions/core.c:780 adfspart_check_ICS+0x2d/0x3a0 block/partitions/acorn.c:360 check_partition block/partitions/core.c:140 [inline] blk_add_partitions+0x187/0x460 block/partitions/core.c:708 bdev_disk_changed+0x79/0x100 fs/block_dev.c:1417 __blkdev_get+0x305/0x6c0 fs/block_dev.c:1546 blkdev_get+0x3b/0xb0 fs/block_dev.c:1634 do_dentry_open+0x15a/0x3c0 fs/open.c:817 do_open fs/namei.c:3252 [inline] path_openat+0x47d/0xa90 fs/namei.c:3369 do_filp_open+0x8e/0x100 fs/namei.c:3396 do_sys_openat2+0x219/0x2d0 fs/open.c:1168 do_sys_open+0x46/0x80 fs/open.c:1184 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f30d3892840 Code: Unable to access opcode bytes at RIP 0x7f30d3892816. RSP: 002b:00007ffd16dcff88 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00005569710a63b0 RCX: 00007f30d3892840 RDX: 000055696f22cfe3 RSI: 00000000000a0800 RDI: 00005569710a0ca0 RBP: 00007ffd16dd0100 R08: 000055696f22c670 R09: 0000000000000010 R10: 000055696f22cd0c R11: 0000000000000246 R12: 00007ffd16dd0050 R13: 00005569710939c0 R14: 0000000000000003 R15: 000000000000000e INFO: task systemd-udevd:8430 blocked for more than 144 seconds. Not tainted 5.10.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:13528 pid: 8430 ppid: 3939 flags:0x00004100 Call Trace: context_switch kernel/sched/core.c:3774 [inline] __schedule+0x418/0x900 kernel/sched/core.c:4523 schedule+0x38/0xe0 kernel/sched/core.c:4601 io_schedule+0xd/0x40 kernel/sched/core.c:6295 wait_on_page_bit_common+0x2a3/0x400 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:2963 [inline] do_read_cache_page+0x275/0x3f0 mm/filemap.c:3006 read_mapping_page include/linux/pagemap.h:500 [inline] read_part_sector+0x31/0x140 block/partitions/core.c:780 adfspart_check_ICS+0x2d/0x3a0 block/partitions/acorn.c:360 check_partition block/partitions/core.c:140 [inline] blk_add_partitions+0x187/0x460 block/partitions/core.c:708 bdev_disk_changed+0x79/0x100 fs/block_dev.c:1417 __blkdev_get+0x305/0x6c0 fs/block_dev.c:1546 blkdev_get+0x3b/0xb0 fs/block_dev.c:1634 do_dentry_open+0x15a/0x3c0 fs/open.c:817 do_open fs/namei.c:3252 [inline] path_openat+0x47d/0xa90 fs/namei.c:3369 do_filp_open+0x8e/0x100 fs/namei.c:3396 do_sys_openat2+0x219/0x2d0 fs/open.c:1168 do_sys_open+0x46/0x80 fs/open.c:1184 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f30d3892840 Code: Unable to access opcode bytes at RIP 0x7f30d3892816. RSP: 002b:00007ffd16dcff88 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00005569710a63b0 RCX: 00007f30d3892840 RDX: 000055696f22cfe3 RSI: 00000000000a0800 RDI: 00005569710a20f0 RBP: 00007ffd16dd0100 R08: 000055696f22c670 R09: 0000000000000010 R10: 000055696f22cd0c R11: 0000000000000246 R12: 00007ffd16dd0050 R13: 00005569710939c0 R14: 0000000000000003 R15: 000000000000000e INFO: task syz-executor.3:8431 blocked for more than 145 seconds. Not tainted 5.10.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:14008 pid: 8431 ppid: 6993 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:3774 [inline] __schedule+0x418/0x900 kernel/sched/core.c:4523 schedule+0x38/0xe0 kernel/sched/core.c:4601 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4660 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x472/0x9f0 kernel/locking/mutex.c:1103 blkdev_put+0x18/0x130 fs/block_dev.c:1802 blkdev_close+0x1f/0x30 fs/block_dev.c:1851 __fput+0xaa/0x250 fs/file_table.c:281 task_work_run+0x68/0xb0 kernel/task_work.c:151 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0x211/0x220 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x7a/0x2c0 kernel/entry/common.c:266 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x417901 Code: Unable to access opcode bytes at RIP 0x4178d7. RSP: 002b:00007ffedfff5260 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000417901 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffedfff5350 R11: 0000000000000293 R12: 000000000118d9c0 R13: 000000000118d9c0 R14: ffffffffffffffff R15: 000000000118cf4c Showing all locks held in the system: 1 lock held by khungtaskd/939: #0: ffffffff847fbd40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x15/0x17a kernel/locking/lockdep.c:6260 3 locks held by kworker/u4:6/940: #0: ffff88813bc2df58 (&rq->lock){-.-.}-{2:2}, at: newidle_balance+0x43a/0x650 kernel/sched/fair.c:10576 #1: ffffffff847fbd40 (rcu_read_lock){....}-{1:2}, at: __update_idle_core+0x0/0x270 kernel/sched/fair.c:5215 #2: ffff88813bc1d618 (&base->lock){..-.}-{2:2}, at: lock_timer_base+0x70/0xc0 kernel/time/timer.c:949 1 lock held by in:imklog/6396: 1 lock held by syz-executor.0/8367: #0: ffff88810dffa280 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x18/0x130 fs/block_dev.c:1802 1 lock held by syz-executor.0/8378: #0: ffff88810dffa280 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x18/0x130 fs/block_dev.c:1802 1 lock held by syz-executor.2/8385: #0: ffff88810f46ea00 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x18/0x130 fs/block_dev.c:1802 1 lock held by syz-executor.2/8389: #0: ffff88810f46ea00 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x18/0x130 fs/block_dev.c:1802 1 lock held by systemd-udevd/8395: #0: ffff88810dffa280 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x1d7/0x6c0 fs/block_dev.c:1479 1 lock held by systemd-udevd/8396: #0: ffff88810f4a6680 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x1d7/0x6c0 fs/block_dev.c:1479 1 lock held by systemd-udevd/8398: #0: ffff88810f46ea00 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x1d7/0x6c0 fs/block_dev.c:1479 1 lock held by systemd-udevd/8428: #0: ffff88810f4a59c0 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x1d7/0x6c0 fs/block_dev.c:1479 1 lock held by systemd-udevd/8430: #0: ffff88810dffc900 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x1d7/0x6c0 fs/block_dev.c:1479 1 lock held by syz-executor.3/8431: #0: ffff88810f4a59c0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x18/0x130 fs/block_dev.c:1802 1 lock held by syz-executor.3/8432: #0: ffff88810f4a59c0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x18/0x130 fs/block_dev.c:1802 1 lock held by syz-executor.1/8436: #0: ffff88810dffc900 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x18/0x130 fs/block_dev.c:1802 1 lock held by syz-executor.1/8437: #0: ffff88810dffc900 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x18/0x130 fs/block_dev.c:1802 1 lock held by syz-executor.5/8440: #0: ffff88810f4a6680 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x18/0x130 fs/block_dev.c:1802 1 lock held by syz-executor.5/8442: #0: ffff88810f4a6680 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x18/0x130 fs/block_dev.c:1802 1 lock held by syz-executor.4/8441: #0: ffff88810f4a53c0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x18/0x130 fs/block_dev.c:1802 1 lock held by syz-executor.4/8444: #0: ffff88810f4a53c0 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x18/0x130 fs/block_dev.c:1802 1 lock held by systemd-udevd/8451: #0: ffff88810f4a53c0 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x1d7/0x6c0 fs/block_dev.c:1479 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 939 Comm: khungtaskd Not tainted 5.10.0-rc1-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+0xa3/0xc8 lib/dump_stack.c:118 nmi_cpu_backtrace.cold.8+0x53/0x6d 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+0x57f/0x670 kernel/hung_task.c:295 kthread+0x145/0x170 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 21 Comm: kworker/u4:1 Not tainted 5.10.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy8 ieee80211_iface_work RIP: 0010:rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:319 [inline] RIP: 0010:rcu_is_watching+0x20/0x70 kernel/rcu/tree.c:1102 Code: 66 2e 0f 1f 84 00 00 00 00 00 53 48 83 ec 08 65 ff 05 d4 fc d9 7e e8 ef 7b 03 02 48 c7 c3 40 ed 02 00 89 c0 48 83 f8 3f 77 29 <48> 03 1c c5 00 29 33 84 8b 83 28 01 00 00 d1 e8 83 e0 01 65 ff 0d RSP: 0018:ffffc90000d1f300 EFLAGS: 00000093 RAX: 0000000000000000 RBX: 000000000002ed40 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8429fe36 RDI: ffffffff840d7b95 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: ffffffff867599d8 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f327a006020 CR3: 000000010e437000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_lock_held_common+0x1c/0x40 kernel/rcu/update.c:106 rcu_read_lock_sched_held+0x1e/0x80 kernel/rcu/update.c:121 trace_lock_acquire include/trace/events/lock.h:13 [inline] lock_acquire+0x2f2/0x420 kernel/locking/lockdep.c:5413 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x58/0x80 kernel/locking/spinlock.c:159 debug_object_activate+0xb0/0x240 lib/debugobjects.c:656 debug_rcu_head_queue kernel/rcu/rcu.h:176 [inline] kvfree_call_rcu+0xa0/0x4a0 kernel/rcu/tree.c:3445 cfg80211_update_known_bss+0x62/0x1f0 net/wireless/scan.c:1653 cfg80211_bss_update+0x6d/0x6c0 net/wireless/scan.c:1700 cfg80211_inform_single_bss_frame_data+0x22c/0x560 net/wireless/scan.c:2399 cfg80211_inform_bss_frame_data+0x32/0x3b0 net/wireless/scan.c:2432 ieee80211_bss_info_update+0x14a/0x3e0 net/mac80211/scan.c:190 ieee80211_rx_bss_info net/mac80211/ibss.c:1126 [inline] ieee80211_rx_mgmt_probe_beacon+0x370/0x940 net/mac80211/ibss.c:1615 ieee80211_ibss_rx_queued_mgmt+0xcf/0x7e0 net/mac80211/ibss.c:1642 ieee80211_iface_work+0x285/0x390 net/mac80211/iface.c:1455 process_one_work+0x273/0x600 kernel/workqueue.c:2272 worker_thread+0x38/0x380 kernel/workqueue.c:2418 kthread+0x145/0x170 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296