INFO: task syz-executor.1:2271 blocked for more than 430 seconds. Not tainted 5.16.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack: 0 pid: 2271 ppid: 1 flags:0x00000001 Backtrace: [<81712400>] (__schedule) from [<81712e58>] (schedule+0x54/0xdc kernel/sched/core.c:6326) r10:8341912c r9:5ac3c35a r8:82c84cc0 r7:838f27d4 r6:00000001 r5:836ce0b8 r4:83dddc00 [<81712e04>] (schedule) from [<8071abf4>] (blk_mq_freeze_queue_wait+0x6c/0xa4 block/blk-mq.c:178) r5:836ce0b8 r4:836ce520 [<8071ab88>] (blk_mq_freeze_queue_wait) from [<8071db68>] (blk_freeze_queue block/blk-mq.c:205 [inline]) [<8071ab88>] (blk_mq_freeze_queue_wait) from [<8071db68>] (blk_mq_freeze_queue+0x1c/0x20 block/blk-mq.c:214) r5:83419000 r4:836ce0b0 [<8071db4c>] (blk_mq_freeze_queue) from [<809fcd3c>] (__loop_clr_fd+0x6c/0x428 drivers/block/loop.c:1122) r5:83419000 r4:83419000 [<809fccd0>] (__loop_clr_fd) from [<809fd19c>] (lo_release+0xa4/0xa8 drivers/block/loop.c:1761) r10:8220c44c r9:5ac3c35a r8:82c84cc0 r7:838f27d4 r6:00000001 r5:8341912c r4:83419000 [<809fd0f8>] (lo_release) from [<80706a4c>] (blkdev_put_whole block/bdev.c:694 [inline]) [<809fd0f8>] (lo_release) from [<80706a4c>] (blkdev_put+0xd4/0x27c block/bdev.c:956) r7:838f27d4 r6:838f2780 r5:00000083 r4:82c84cc0 [<80706978>] (blkdev_put) from [<80484bb0>] (kill_block_super+0x3c/0x74 fs/super.c:1400) r8:8220c490 r7:8220c920 r6:00000000 r5:00000083 r4:82c84cc0 [<80484b74>] (kill_block_super) from [<80485824>] (deactivate_locked_super+0x54/0xb4 fs/super.c:335) r5:823245b4 r4:84efc800 [<804857d0>] (deactivate_locked_super) from [<804858e4>] (deactivate_super fs/super.c:366 [inline]) [<804857d0>] (deactivate_locked_super) from [<804858e4>] (deactivate_super+0x60/0x64 fs/super.c:362) r5:83ec8e40 r4:84efc800 [<80485884>] (deactivate_super) from [<804a9738>] (cleanup_mnt+0x11c/0x180 fs/namespace.c:1137) r5:83ec8e40 r4:00000002 [<804a961c>] (cleanup_mnt) from [<804a980c>] (__cleanup_mnt+0x14/0x18 fs/namespace.c:1144) r9:5ac3c35a r8:83dde454 r7:8243d600 r6:83dddc00 r5:83dde424 r4:00000000 [<804a97f8>] (__cleanup_mnt) from [<80266e24>] (task_work_run+0x8c/0xb8 kernel/task_work.c:164) [<80266d98>] (task_work_run) from [<8020bff0>] (tracehook_notify_resume include/linux/tracehook.h:189 [inline]) [<80266d98>] (task_work_run) from [<8020bff0>] (do_work_pending+0x438/0x53c arch/arm/kernel/signal.c:630) r9:5ac3c35a r8:80200244 r7:fffffe30 r6:80200244 r5:84043fb0 r4:83dddc00 [<8020bbb8>] (do_work_pending) from [<80200088>] (slow_work_pending+0xc/0x20) Exception stack(0x84043fb0 to 0x84043ff8) 3fa0: 00000000 0000000a 00000000 00000000 3fc0: 00085150 7ed91510 00120000 00000034 00085150 01e5afc8 00000000 7ed914d0 3fe0: 7f0302ff 7ed91494 00014734 0004ce3c 60000010 7ed91510 r10:00000034 r9:83dddc00 r8:80200244 r7:00000034 r6:00120000 r5:7ed91510 r4:00085150 INFO: task udevd:11707 blocked for more than 430 seconds. Not tainted 5.16.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack: 0 pid:11707 ppid: 2030 flags:0x00000001 Backtrace: [<81712400>] (__schedule) from [<81712e58>] (schedule+0x54/0xdc kernel/sched/core.c:6326) r10:838f27d4 r9:4800005d r8:838f27d8 r7:8374bcbc r6:00000002 r5:83518b80 r4:83518b80 [<81712e04>] (schedule) from [<81713474>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:6385) r5:83518b80 r4:838f27d4 [<8171345c>] (schedule_preempt_disabled) from [<817147ac>] (__mutex_lock_common kernel/locking/mutex.c:680 [inline]) [<8171345c>] (schedule_preempt_disabled) from [<817147ac>] (__mutex_lock.constprop.0+0x170/0x54c kernel/locking/mutex.c:740) [<8171463c>] (__mutex_lock.constprop.0) from [<81714c5c>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1028) r9:4800005d r8:00000000 r7:838f2780 r6:85243240 r5:4800005d r4:82c84cc0 [<81714c48>] (__mutex_lock_slowpath) from [<81714c9c>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:283) [<81714c60>] (mutex_lock) from [<80706fd4>] (blkdev_get_by_dev.part.0+0x44/0x2dc block/bdev.c:819) [<80706f90>] (blkdev_get_by_dev.part.0) from [<807072b4>] (blkdev_get_by_dev+0x48/0x4c block/bdev.c:803) r10:8374be50 r9:85243248 r8:807078e8 r7:85243240 r6:85243240 r5:4800005d r4:00700001 [<8070726c>] (blkdev_get_by_dev) from [<80707940>] (blkdev_open+0x58/0x88 block/fops.c:501) r7:85243240 r6:00000000 r5:8343f348 r4:85243240 [<807078e8>] (blkdev_open) from [<8047d928>] (do_dentry_open+0x148/0x3f8 fs/open.c:822) r5:8343f348 r4:85243240 [<8047d7e0>] (do_dentry_open) from [<8047f618>] (vfs_open+0x34/0x38 fs/open.c:957) r9:8374bf20 r8:00000000 r7:85243240 r6:82225d20 r5:00000000 r4:00028800 [<8047f5e4>] (vfs_open) from [<804936b8>] (do_open fs/namei.c:3426 [inline]) [<8047f5e4>] (vfs_open) from [<804936b8>] (path_openat+0x544/0x102c fs/namei.c:3559) [<80493174>] (path_openat) from [<80495a20>] (do_filp_open+0x84/0x124 fs/namei.c:3586) r10:00000142 r9:83518b80 r8:8374be50 r7:00000000 r6:83518b80 r5:8374bf20 r4:8374bf58 [<8049599c>] (do_filp_open) from [<8047f908>] (do_sys_openat2+0xa8/0x16c fs/open.c:1212) r8:80200244 r7:ffffff9c r6:00000008 r5:83efd000 r4:8374bf58 [<8047f860>] (do_sys_openat2) from [<8047fda4>] (do_sys_open fs/open.c:1228 [inline]) [<8047f860>] (do_sys_openat2) from [<8047fda4>] (__do_sys_openat fs/open.c:1244 [inline]) [<8047f860>] (do_sys_openat2) from [<8047fda4>] (sys_openat+0xa4/0xcc fs/open.c:1239) r7:00000142 r6:01826828 r5:016ae420 r4:ffffff9c [<8047fd00>] (sys_openat) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0x8374bfa8 to 0x8374bff0) bfa0: 016b0a30 76f6a840 ffffff9c 016ae420 000a8800 00000000 bfc0: 016b0a30 76f6a840 01826828 00000142 000563e8 0169f190 00000000 016b0a30 bfe0: 000561b4 7ed11438 000166d8 76c34350 r5:76f6a840 r4:016b0a30 NMI backtrace for cpu 0 CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: [<816f56d0>] (dump_backtrace) from [<816f58bc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:237) r7:00000000 r6:00000000 r5:60000193 r4:81d6017c [<816f58a4>] (show_stack) from [<816fe314>] (__dump_stack lib/dump_stack.c:88 [inline]) [<816f58a4>] (show_stack) from [<816fe314>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<816fe2cc>] (dump_stack_lvl) from [<816fe338>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:00000113 r4:00000000 [<816fe320>] (dump_stack) from [<8083cd6c>] (nmi_cpu_backtrace+0x114/0x180 lib/nmi_backtrace.c:105) [<8083cc58>] (nmi_cpu_backtrace) from [<8083ceec>] (nmi_trigger_cpumask_backtrace+0x114/0x1d0 lib/nmi_backtrace.c:62) r7:00000000 r6:8220c494 r5:8220cc70 r4:00000000 [<8083cdd8>] (nmi_trigger_cpumask_backtrace) from [<80210c54>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:865) r9:00067e00 r8:82204d00 r7:00007f61 r6:824839b0 r5:8220c5d4 r4:82bdb240 [<80210c3c>] (arch_trigger_cpumask_backtrace) from [<80329f7c>] (trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]) [<80210c3c>] (arch_trigger_cpumask_backtrace) from [<80329f7c>] (check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]) [<80210c3c>] (arch_trigger_cpumask_backtrace) from [<80329f7c>] (watchdog+0x4a0/0x58c kernel/hung_task.c:295) [<80329adc>] (watchdog) from [<8026a518>] (kthread+0x164/0x198 kernel/kthread.c:327) r10:8294de4c r9:00000000 r8:00000000 r7:80329adc r6:828cf180 r5:82a89240 r4:828f2e00 [<8026a3b4>] (kthread) from [<80200100>] (ret_from_fork+0x14/0x34 arch/arm/kernel/entry-common.S:146) Exception stack(0x82a25fb0 to 0x82a25ff8) 5fa0: 00000000 00000000 00000000 00000000 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8026a3b4 r4:82a89240 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 2226 Comm: syz-fuzzer Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express PC is at 0x7dffc LR is at 0x12318 pc : [<0007dffc>] lr : [<00012318>] psr: 80000010 sp : 169010dc ip : 000011ca fp : 00000005 r10: 020008c0 r9 : 00000001 r8 : 00000000 r7 : 00000000 r6 : 00000000 r5 : 00000000 r4 : 00000000 r3 : 11970960 r2 : 009fb178 r1 : 0200c710 r0 : 009fb17c Flags: Nzcv IRQs on FIQs on Mode USER_32 ISA ARM Segment none Control: 30c5387d Table: 847a9940 DAC: 00000000 CPU: 1 PID: 2226 Comm: syz-fuzzer Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: [<816f56d0>] (dump_backtrace) from [<816f58bc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:237) r7:00000017 r6:84291fb0 r5:60000193 r4:81d6017c [<816f58a4>] (show_stack) from [<816fe314>] (__dump_stack lib/dump_stack.c:88 [inline]) [<816f58a4>] (show_stack) from [<816fe314>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<816fe2cc>] (dump_stack_lvl) from [<816fe338>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:00000193 r4:00000001 [<816fe320>] (dump_stack) from [<80209080>] (show_regs+0x14/0x18 arch/arm/kernel/process.c:199) [<8020906c>] (show_regs) from [<8083cd54>] (nmi_cpu_backtrace+0xfc/0x180 lib/nmi_backtrace.c:103) [<8083cc58>] (nmi_cpu_backtrace) from [<8020fd58>] (do_handle_IPI+0x4c/0x3b4 arch/arm/kernel/smp.c:680) r7:00000017 r6:00000001 r5:8280cb80 r4:00000007 [<8020fd0c>] (do_handle_IPI) from [<802100e0>] (ipi_handler+0x20/0x28 arch/arm/kernel/smp.c:708) r9:00000001 r8:84291f18 r7:00000017 r6:8220cc8c r5:8280cb80 r4:82885d00 [<802100c0>] (ipi_handler) from [<802b9530>] (handle_percpu_devid_irq+0x9c/0x2d4 kernel/irq/chip.c:933) [<802b9494>] (handle_percpu_devid_irq) from [<802b2ba0>] (generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]) [<802b9494>] (handle_percpu_devid_irq) from [<802b2ba0>] (handle_irq_desc kernel/irq/irqdesc.c:646 [inline]) [<802b9494>] (handle_percpu_devid_irq) from [<802b2ba0>] (generic_handle_domain_irq+0x48/0x8c kernel/irq/irqdesc.c:680) r10:020008c0 r9:00000001 r8:00000000 r7:df80200c r6:840cd080 r5:00000007 r4:82888000 r3:802b9494 [<802b2b58>] (generic_handle_domain_irq) from [<8084fa80>] (gic_handle_irq+0x68/0x7c drivers/irqchip/irq-gic.c:372) r7:df80200c r6:820a5fc4 r5:df802000 r4:8220cc8c [<8084fa18>] (gic_handle_irq) from [<81710264>] (generic_handle_arch_irq+0x60/0x80 kernel/irq/handle.c:243) r7:84291fb0 r6:81f092c0 r5:81f092d8 r4:820a5fb8 [<81710204>] (generic_handle_arch_irq) from [<80200dbc>] (__irq_usr+0x5c/0x80 arch/arm/kernel/entry-armv.S:429) Exception stack(0x84291fb0 to 0x84291ff8) 1fa0: 009fb17c 0200c710 009fb178 11970960 1fc0: 00000000 00000000 00000000 00000000 00000000 00000001 020008c0 00000005 1fe0: 000011ca 169010dc 00012318 0007dffc 80000010 ffffffff r9:00000001 r8:5bd3e000 r7:840cd080 r6:ffffffff r5:80000010 r4:0007dffc