INFO: task udevd:20882 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:20882 ppid: 2031 flags:0x00000001 Backtrace: [<816d5388>] (__schedule) from [<816d5de0>] (schedule+0x54/0xdc kernel/sched/core.c:6326) r10:8359d92c r9:5ac3c35a r8:836a33d0 r7:8383c4d4 r6:00000001 r5:83775b08 r4:83f94500 [<816d5d8c>] (schedule) from [<8071ae2c>] (blk_mq_freeze_queue_wait+0x6c/0xa4 block/blk-mq.c:178) r5:83775b08 r4:83775f70 [<8071adc0>] (blk_mq_freeze_queue_wait) from [<8071dda0>] (blk_freeze_queue block/blk-mq.c:205 [inline]) [<8071adc0>] (blk_mq_freeze_queue_wait) from [<8071dda0>] (blk_mq_freeze_queue+0x1c/0x20 block/blk-mq.c:214) r5:8359d800 r4:83775b00 [<8071dd84>] (blk_mq_freeze_queue) from [<809bf8dc>] (__loop_clr_fd+0x6c/0x428 drivers/block/loop.c:1122) r5:8359d800 r4:8359d800 [<809bf870>] (__loop_clr_fd) from [<809bfd3c>] (lo_release+0xa4/0xa8 drivers/block/loop.c:1761) r10:8220c44c r9:5ac3c35a r8:836a33d0 r7:8383c4d4 r6:00000001 r5:8359d92c r4:8359d800 [<809bfc98>] (lo_release) from [<80706c84>] (blkdev_put_whole block/bdev.c:694 [inline]) [<809bfc98>] (lo_release) from [<80706c84>] (blkdev_put+0xd4/0x27c block/bdev.c:956) r7:8383c4d4 r6:8383c480 r5:480a005d r4:82c84880 [<80706bb0>] (blkdev_put) from [<80707b18>] (blkdev_close+0x18/0x20 block/fops.c:515) r8:836a33d0 r7:830d2440 r6:8384a220 r5:480a005d r4:840aba80 [<80707b00>] (blkdev_close) from [<8048437c>] (__fput+0x84/0x258 fs/file_table.c:280) [<804842f8>] (__fput) from [<804845cc>] (____fput+0x10/0x14 fs/file_table.c:313) r9:5ac3c35a r8:83f94d54 r7:8243d600 r6:83f94500 r5:83f94d24 r4:00000000 [<804845bc>] (____fput) 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 r5:8370dfb0 r4:83f94500 [<8020bbb8>] (do_work_pending) from [<80200088>] (slow_work_pending+0xc/0x20) Exception stack(0x8370dfb0 to 0x8370dff8) dfa0: 00000000 7ed18c48 00000003 00000000 dfc0: 76f9187c 76f91840 00000002 00000006 000563e8 00c09190 00000008 000563f8 dfe0: 000561f4 7ed19448 0002d6d0 76c5c380 600f0010 00000008 r10:00000006 r9:83f94500 r8:80200244 r7:00000006 r6:00000002 r5:76f91840 r4:76f9187c INFO: task syz-executor.0:20889 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.0 state:D stack: 0 pid:20889 ppid: 2234 flags:0x00000001 Backtrace: [<816d5388>] (__schedule) from [<816d5de0>] (schedule+0x54/0xdc kernel/sched/core.c:6326) r10:8383c4d4 r9:4800001f r8:8383c4d8 r7:83a21cbc r6:00000002 r5:83f90000 r4:83f90000 [<816d5d8c>] (schedule) from [<816d63fc>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:6385) r5:83f90000 r4:8383c4d4 [<816d63e4>] (schedule_preempt_disabled) from [<816d7734>] (__mutex_lock_common kernel/locking/mutex.c:680 [inline]) [<816d63e4>] (schedule_preempt_disabled) from [<816d7734>] (__mutex_lock.constprop.0+0x170/0x54c kernel/locking/mutex.c:740) [<816d75c4>] (__mutex_lock.constprop.0) from [<816d7be4>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1028) r9:4800001f r8:00000000 r7:8383c480 r6:8356c0c0 r5:4800001f r4:82c84880 [<816d7bd0>] (__mutex_lock_slowpath) from [<816d7c24>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:283) [<816d7be8>] (mutex_lock) from [<8070720c>] (blkdev_get_by_dev.part.0+0x44/0x2dc block/bdev.c:819) [<807071c8>] (blkdev_get_by_dev.part.0) from [<807074ec>] (blkdev_get_by_dev+0x48/0x4c block/bdev.c:803) r10:83a21e50 r9:8356c0c8 r8:80707b20 r7:8356c0c0 r6:8356c0c0 r5:4800001f r4:00700000 [<807074a4>] (blkdev_get_by_dev) from [<80707b78>] (blkdev_open+0x58/0x88 block/fops.c:501) r7:8356c0c0 r6:00000000 r5:8384a220 r4:8356c0c0 [<80707b20>] (blkdev_open) from [<8047db58>] (do_dentry_open+0x148/0x3f8 fs/open.c:822) r5:8384a220 r4:8356c0c0 [<8047da10>] (do_dentry_open) from [<8047f848>] (vfs_open+0x34/0x38 fs/open.c:957) r9:83a21f20 r8:00000000 r7:8356c0c0 r6:82225d20 r5:00000000 r4:00000002 [<8047f814>] (vfs_open) from [<804938e8>] (do_open fs/namei.c:3426 [inline]) [<8047f814>] (vfs_open) from [<804938e8>] (path_openat+0x544/0x102c fs/namei.c:3559) [<804933a4>] (path_openat) from [<80495c50>] (do_filp_open+0x84/0x124 fs/namei.c:3586) r10:00000142 r9:83f90000 r8:83a21e50 r7:00000001 r6:83f90000 r5:83a21f20 r4:83a21f58 [<80495bcc>] (do_filp_open) from [<8047fb38>] (do_sys_openat2+0xa8/0x16c fs/open.c:1212) r8:80200244 r7:ffffff9c r6:00000004 r5:829ad000 r4:83a21f58 [<8047fa90>] (do_sys_openat2) from [<8047ffd4>] (do_sys_open fs/open.c:1228 [inline]) [<8047fa90>] (do_sys_openat2) from [<8047ffd4>] (__do_sys_openat fs/open.c:1244 [inline]) [<8047fa90>] (do_sys_openat2) from [<8047ffd4>] (sys_openat+0xa4/0xcc fs/open.c:1239) r7:00000142 r6:76fcbee0 r5:76fcbee0 r4:ffffff9c [<8047ff30>] (sys_openat) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0x83a21fa8 to 0x83a21ff0) 1fa0: 20000248 76fccb90 ffffff9c 76fcbee0 00000002 00000000 1fc0: 20000248 76fccb90 76fcbee0 00000142 00000003 00000000 00085104 00000000 1fe0: 00000000 76fcbe50 00028e6c 00029680 r5:76fccb90 r4:20000248 NMI backtrace for cpu 1 CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: [<816b8658>] (dump_backtrace) from [<816b8844>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:237) r7:00000001 r6:00000000 r5:60000093 r4:81d6031c [<816b882c>] (show_stack) from [<816c129c>] (__dump_stack lib/dump_stack.c:88 [inline]) [<816b882c>] (show_stack) from [<816c129c>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<816c1254>] (dump_stack_lvl) from [<816c12c0>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:00000013 r4:00000001 [<816c12a8>] (dump_stack) from [<807ff90c>] (nmi_cpu_backtrace+0x114/0x180 lib/nmi_backtrace.c:111) [<807ff7f8>] (nmi_cpu_backtrace) from [<807ffa90>] (nmi_trigger_cpumask_backtrace+0x118/0x1d4 lib/nmi_backtrace.c:62) r7:00000001 r6:8220c494 r5:8220cc70 r4:00000000 [<807ff978>] (nmi_trigger_cpumask_backtrace) from [<80210c54>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:865) r9:0003db00 r8:82204d00 r7:00007f66 r6:824839b0 r5:8220c5d4 r4:8342ff40 [<80210c3c>] (arch_trigger_cpumask_backtrace) from [<80329fa4>] (trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]) [<80210c3c>] (arch_trigger_cpumask_backtrace) from [<80329fa4>] (check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]) [<80210c3c>] (arch_trigger_cpumask_backtrace) from [<80329fa4>] (watchdog+0x4a0/0x58c kernel/hung_task.c:295) [<80329b04>] (watchdog) from [<8026a518>] (kthread+0x164/0x198 kernel/kthread.c:327) r10:8294de4c r9:00000000 r8:00000000 r7:80329b04 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2020 Comm: klogd Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express PC is at 0x76e6d7e0 LR is at 0x76e6d6c4 pc : [<76e6d7e0>] lr : [<76e6d6c4>] psr: 60070010 sp : 7e99bb30 ip : 00cca802 fp : 00cca7fb r10: 76f026ac r9 : 0000000f r8 : 00001ff5 r7 : 00cca803 r6 : 00000000 r5 : 00cca7fb r4 : 76f06e6f r3 : 00000000 r2 : 80000000 r1 : 00000000 r0 : 00000008 Flags: nZCv IRQs on FIQs on Mode USER_32 ISA ARM Segment user Control: 30c5387d Table: 8380e400 DAC: fffffffd CPU: 0 PID: 2020 Comm: klogd Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: [<816b8658>] (dump_backtrace) from [<816b8844>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:237) r7:00000017 r6:83617fb0 r5:60070193 r4:81d6031c [<816b882c>] (show_stack) from [<816c129c>] (__dump_stack lib/dump_stack.c:88 [inline]) [<816b882c>] (show_stack) from [<816c129c>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<816c1254>] (dump_stack_lvl) from [<816c12c0>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:00070193 r4:00000000 [<816c12a8>] (dump_stack) from [<80209080>] (show_regs+0x14/0x18 arch/arm/kernel/process.c:199) [<8020906c>] (show_regs) from [<807ff8f4>] (nmi_cpu_backtrace+0xfc/0x180 lib/nmi_backtrace.c:109) [<807ff7f8>] (nmi_cpu_backtrace) from [<8020fd58>] (do_handle_IPI+0x4c/0x3b4 arch/arm/kernel/smp.c:680) r7:00000017 r6:00000000 r5:8280cb80 r4:00000007 [<8020fd0c>] (do_handle_IPI) from [<802100e0>] (ipi_handler+0x20/0x28 arch/arm/kernel/smp.c:708) r9:0000000f r8:83617f18 r7:00000017 r6:8220cc8c r5:8280cb80 r4:82885d00 [<802100c0>] (ipi_handler) from [<802b9558>] (handle_percpu_devid_irq+0x9c/0x2d4 kernel/irq/chip.c:933) [<802b94bc>] (handle_percpu_devid_irq) from [<802b2bc8>] (generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]) [<802b94bc>] (handle_percpu_devid_irq) from [<802b2bc8>] (handle_irq_desc kernel/irq/irqdesc.c:646 [inline]) [<802b94bc>] (handle_percpu_devid_irq) from [<802b2bc8>] (generic_handle_domain_irq+0x48/0x8c kernel/irq/irqdesc.c:680) r10:76f026ac r9:0000000f r8:00000000 r7:df80200c r6:83f9dc00 r5:00000007 r4:82888000 r3:802b94bc [<802b2b80>] (generic_handle_domain_irq) from [<80812624>] (gic_handle_irq+0x68/0x7c drivers/irqchip/irq-gic.c:372) r7:df80200c r6:820a5fc4 r5:df802000 r4:8220cc8c [<808125bc>] (gic_handle_irq) from [<816d31ec>] (generic_handle_arch_irq+0x60/0x80 kernel/irq/handle.c:243) r7:83617fb0 r6:81f094b4 r5:81f094cc r4:820a5fb8 [<816d318c>] (generic_handle_arch_irq) from [<80200dbc>] (__irq_usr+0x5c/0x80 arch/arm/kernel/entry-armv.S:429) Exception stack(0x83617fb0 to 0x83617ff8) 7fa0: 00000008 00000000 80000000 00000000 7fc0: 76f06e6f 00cca7fb 00000000 00cca803 00001ff5 0000000f 76f026ac 00cca7fb 7fe0: 00cca802 7e99bb30 76e6d6c4 76e6d7e0 60070010 ffffffff r9:0000000f r8:5bd2d000 r7:83f9dc00 r6:ffffffff r5:60070010 r4:76e6d7e0