INFO: task syz-executor.0:4046 blocked for more than 430 seconds. Not tainted 6.9.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:0 pid:4046 tgid:4044 ppid:3022 flags:0x00000005 Call trace: [<81904c90>] (__schedule) from [<81905894>] (__schedule_loop kernel/sched/core.c:6822 [inline]) [<81904c90>] (__schedule) from [<81905894>] (schedule+0x2c/0xfc kernel/sched/core.c:6837) r10:dfb65b7c r9:82605244 r8:82604ec0 r7:00000000 r6:00000002 r5:00000000 r4:847cd400 [<81905868>] (schedule) from [<819059c0>] (io_schedule+0x38/0x48 kernel/sched/core.c:9043) r5:00000000 r4:847cd400 [<81905988>] (io_schedule) from [<80433a60>] (folio_wait_bit_common+0x190/0x3a8 mm/filemap.c:1307) r5:847cd400 r4:00000002 [<804338d0>] (folio_wait_bit_common) from [<80437148>] (folio_put_wait_locked mm/filemap.c:1471 [inline]) [<804338d0>] (folio_wait_bit_common) from [<80437148>] (do_read_cache_folio+0x98/0x248 mm/filemap.c:3770) r10:85035480 r9:00080001 r8:00000000 r7:8078b69c r6:00000000 r5:831807b8 r4:ddeae02c [<804370b0>] (do_read_cache_folio) from [<80437314>] (read_cache_folio+0x1c/0x24 mm/filemap.c:3820) r10:85035480 r9:00000002 r8:00000000 r7:00000000 r6:807b332c r5:837b6600 r4:00000000 r3:00000000 [<804372f8>] (read_cache_folio) from [<807b311c>] (read_mapping_folio include/linux/pagemap.h:894 [inline]) [<804372f8>] (read_cache_folio) from [<807b311c>] (read_part_sector+0x58/0xd0 block/partitions/core.c:712) [<807b30c4>] (read_part_sector) from [<807b3394>] (msdos_partition+0x68/0xafc block/partitions/msdos.c:592) r5:837b6600 r4:85035480 [<807b332c>] (msdos_partition) from [<807b2a7c>] (check_partition block/partitions/core.c:138 [inline]) [<807b332c>] (msdos_partition) from [<807b2a7c>] (blk_add_partitions block/partitions/core.c:579 [inline]) [<807b332c>] (msdos_partition) from [<807b2a7c>] (bdev_disk_changed+0x2d4/0x6ac block/partitions/core.c:683) r10:00000000 r9:81aebff8 r8:00000000 r7:827ee49d r6:807b332c r5:837b6600 r4:85035480 [<807b27a8>] (bdev_disk_changed) from [<8078a224>] (blkdev_get_whole+0xa8/0xd0 block/bdev.c:680) r10:837b672c r9:00000000 r8:00000001 r7:00000001 r6:837b6600 r5:00000000 r4:83180440 [<8078a17c>] (blkdev_get_whole) from [<8078ad7c>] (bdev_open+0x224/0x3e8 block/bdev.c:889) r7:837b6600 r6:00000000 r5:8435d840 r4:83180440 [<8078ab58>] (bdev_open) from [<8078cb14>] (blkdev_open+0x78/0x9c block/fops.c:615) r10:8435d840 r9:00000004 r8:8435d8b0 r7:83180440 r6:00000001 r5:8435d840 r4:00000000 [<8078ca9c>] (blkdev_open) from [<804fdf34>] (do_dentry_open+0x1e4/0x57c fs/open.c:955) r7:8078ca9c r6:00000000 r5:83832260 r4:8435d840 [<804fdd50>] (do_dentry_open) from [<804fff08>] (vfs_open+0x34/0x38 fs/open.c:1089) r8:dfb65e58 r7:dfb65f20 r6:00000000 r5:8271c0c8 r4:00000000 [<804ffed4>] (vfs_open) from [<80517c54>] (do_open fs/namei.c:3650 [inline]) [<804ffed4>] (vfs_open) from [<80517c54>] (path_openat+0xa84/0x10e0 fs/namei.c:3807) [<805171d0>] (path_openat) from [<80518a90>] (do_filp_open+0x9c/0x138 fs/namei.c:3834) r10:00000142 r9:847cd400 r8:00000001 r7:dfb65e58 r6:dfb65f20 r5:847cd400 r4:82ea9000 [<805189f4>] (do_filp_open) from [<805001f4>] (do_sys_openat2+0xbc/0xe4 fs/open.c:1406) r8:8020029c r7:ffffff9c r6:00000006 r5:dfb65f58 r4:82ea9000 [<80500138>] (do_sys_openat2) from [<805005fc>] (do_sys_open fs/open.c:1421 [inline]) [<80500138>] (do_sys_openat2) from [<805005fc>] (__do_sys_openat fs/open.c:1437 [inline]) [<80500138>] (do_sys_openat2) from [<805005fc>] (sys_openat+0x98/0xd4 fs/open.c:1432) r7:00000142 r6:00000000 r5:76b9baf8 r4:ffffff9c [<80500564>] (sys_openat) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67) Exception stack(0xdfb65fa8 to 0xdfb65ff0) 5fa0: 00000000 76b9baf8 ffffff9c 76b9baf8 00000000 00000000 5fc0: 00000000 76b9baf8 00000000 00000142 00000000 7eecf32f 003d0f00 76b9c0fc 5fe0: 81010101 76b9bab0 00091468 0004f848 r5:76b9baf8 r4:00000000 INFO: task syz-executor.0:4047 blocked for more than 430 seconds. Not tainted 6.9.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:0 pid:4047 tgid:4044 ppid:3022 flags:0x00000005 Call trace: [<81904c90>] (__schedule) from [<81905894>] (__schedule_loop kernel/sched/core.c:6822 [inline]) [<81904c90>] (__schedule) from [<81905894>] (schedule+0x2c/0xfc kernel/sched/core.c:6837) r10:00000036 r9:00000000 r8:837b6730 r7:00000002 r6:df9fde24 r5:847c8000 r4:847c8000 [<81905868>] (schedule) from [<81905ea4>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:6894) r5:847c8000 r4:837b672c [<81905e8c>] (schedule_preempt_disabled) from [<8190878c>] (__mutex_lock_common kernel/locking/mutex.c:684 [inline]) [<81905e8c>] (schedule_preempt_disabled) from [<8190878c>] (__mutex_lock.constprop.0+0x2e8/0xae0 kernel/locking/mutex.c:752) [<819084a4>] (__mutex_lock.constprop.0) from [<81909058>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1040) r10:00000036 r9:837b672c r8:83180440 r7:00000000 r6:837b6600 r5:8438ff00 r4:831806a8 [<81909044>] (__mutex_lock_slowpath) from [<81909098>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:286) [<8190905c>] (mutex_lock) from [<8078b1a4>] (bdev_release+0x58/0x1a0 block/bdev.c:1059) [<8078b14c>] (bdev_release) from [<8078b73c>] (blkdev_release+0x14/0x1c block/fops.c:623) r9:847c8000 r8:841d3610 r7:83832260 r6:83025f30 r5:084a001d r4:8438ff00 [<8078b728>] (blkdev_release) from [<805050b4>] (__fput+0x84/0x2d4 fs/file_table.c:422) [<80505030>] (__fput) from [<80505380>] (____fput+0x10/0x14 fs/file_table.c:450) r9:847c8000 r8:82860608 r7:847c8000 r6:847c8884 r5:847c8854 r4:00000000 [<80505370>] (____fput) from [<8026de6c>] (task_work_run+0x90/0xb8 kernel/task_work.c:180) [<8026dddc>] (task_work_run) from [<8020bde8>] (resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]) [<8026dddc>] (task_work_run) from [<8020bde8>] (do_work_pending+0x448/0x4f8 arch/arm/kernel/signal.c:631) r9:847c8000 r8:8020029c r7:00000036 r6:8020029c r5:df9fdfb0 r4:847c8000 [<8020b9a0>] (do_work_pending) from [<80200088>] (slow_work_pending+0xc/0x24) Exception stack(0xdf9fdfb0 to 0xdf9fdff8) dfa0: 00000000 0000ab03 00000000 00000000 dfc0: 00000000 00000000 0014c354 00000036 7eecf32e 7eecf32f 003d0f00 76b7b0fc dfe0: 76b7af08 76b7aef8 00016d28 00051560 60000010 00000003 r10:00000036 r9:847c8000 r8:8020029c r7:00000036 r6:0014c354 r5:00000000 r4:00000000 NMI backtrace for cpu 1 CPU: 1 PID: 32 Comm: khungtaskd Not tainted 6.9.0-syzkaller #0 Hardware name: ARM-Versatile Express Call trace: [<818e358c>] (dump_backtrace) from [<818e3688>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257) r7:00000000 r6:00000113 r5:60000193 r4:81fe2aec [<818e3670>] (show_stack) from [<81900c98>] (__dump_stack lib/dump_stack.c:88 [inline]) [<818e3670>] (show_stack) from [<81900c98>] (dump_stack_lvl+0x70/0x7c lib/dump_stack.c:114) [<81900c28>] (dump_stack_lvl) from [<81900cbc>] (dump_stack+0x18/0x1c lib/dump_stack.c:123) r5:00000001 r4:00000001 [<81900ca4>] (dump_stack) from [<818d08b8>] (nmi_cpu_backtrace+0x160/0x17c lib/nmi_backtrace.c:113) [<818d0758>] (nmi_cpu_backtrace) from [<818d0a04>] (nmi_trigger_cpumask_backtrace+0x130/0x1d8 lib/nmi_backtrace.c:62) r7:00000001 r6:8260c5d0 r5:8261a7cc r4:ffffffff [<818d08d4>] (nmi_trigger_cpumask_backtrace) from [<80210408>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:851) r9:827e5ee7 r8:828a4fa0 r7:8260c734 r6:00007f2f r5:8261adc8 r4:84652c1c [<802103f0>] (arch_trigger_cpumask_backtrace) from [<803531f8>] (trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]) [<802103f0>] (arch_trigger_cpumask_backtrace) from [<803531f8>] (check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]) [<802103f0>] (arch_trigger_cpumask_backtrace) from [<803531f8>] (watchdog+0x48c/0x59c kernel/hung_task.c:379) [<80352d6c>] (watchdog) from [<8027151c>] (kthread+0x104/0x134 kernel/kthread.c:389) r10:00000000 r9:df819e58 r8:82ce3600 r7:00000000 r6:80352d6c r5:82e9b000 r4:82f821c0 [<80271418>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:134) Exception stack(0xdf8e1fb0 to 0xdf8e1ff8) 1fa0: 00000000 00000000 00000000 00000000 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:80271418 r4:82f821c0 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.9.0-syzkaller #0 Hardware name: ARM-Versatile Express PC is at kmap_local_sched_in kernel/sched/core.c:5188 [inline] PC is at finish_task_switch+0x8c/0x294 kernel/sched/core.c:5290 LR is at __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline] LR is at _raw_spin_unlock+0x2c/0x50 kernel/locking/spinlock.c:186 pc : [<8027ed0c>] lr : [<8190ddc0>] psr: 20000013 sp : 82601e88 ip : 82601e78 fp : 82601ecc r10: 00002001 r9 : 8261adc0 r8 : 83823000 r7 : 84096100 r6 : 8190508c r5 : dddd0440 r4 : 00000000 r3 : 8261adc0 r2 : 00000001 r1 : 81fe2aec r0 : 00000001 Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 85344740 DAC: fffffffd Call trace: [<8027ec80>] (finish_task_switch) from [<8190508c>] (context_switch kernel/sched/core.c:5411 [inline]) [<8027ec80>] (finish_task_switch) from [<8190508c>] (__schedule+0x3fc/0xbd8 kernel/sched/core.c:6745) r10:00000000 r9:84096100 r8:8260ca7c r7:84096100 r6:8261adc0 r5:dddd0440 r4:84da0000 [<81904c90>] (__schedule) from [<81905ddc>] (schedule_idle+0x24/0x68 kernel/sched/core.c:6863) r10:00000000 r9:00000000 r8:00000000 r7:8260c5f8 r6:8261adc0 r5:8260c5d0 r4:8261adc0 [<81905db8>] (schedule_idle) from [<8029bee0>] (do_idle+0x19c/0x2cc kernel/sched/idle.c:360) r5:8260c5d0 r4:00000000 [<8029bd44>] (do_idle) from [<8029c344>] (cpu_startup_entry+0x30/0x34 kernel/sched/idle.c:430) r10:8261a8b0 r9:820f8d80 r8:8260c580 r7:00000000 r6:deffc061 r5:82625cfc r4:000000ec [<8029c314>] (cpu_startup_entry) from [<81902fc8>] (kernel_init+0x0/0x138 init/main.c:742) [<81902ee8>] (rest_init) from [<82401398>] (start_kernel+0x75c/0x778 init/main.c:1084) [<82400c3c>] (start_kernel) from [<00000000>] (0x0)