INFO: task syz-executor.0:2233 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: 2233 ppid: 1 flags:0x00000001 Backtrace: [<81712440>] (__schedule) from [<81712e98>] (schedule+0x54/0xdc kernel/sched/core.c:6326) r10:83964d2c r9:5ac3c35a r8:82c84880 r7:839914d4 r6:00000001 r5:834e5b08 r4:8354ae00 [<81712e44>] (schedule) from [<8071ac24>] (blk_mq_freeze_queue_wait+0x6c/0xa4 block/blk-mq.c:178) r5:834e5b08 r4:834e5f70 [<8071abb8>] (blk_mq_freeze_queue_wait) from [<8071db98>] (blk_freeze_queue block/blk-mq.c:205 [inline]) [<8071abb8>] (blk_mq_freeze_queue_wait) from [<8071db98>] (blk_mq_freeze_queue+0x1c/0x20 block/blk-mq.c:214) r5:83964c00 r4:834e5b00 [<8071db7c>] (blk_mq_freeze_queue) from [<809fcd7c>] (__loop_clr_fd+0x6c/0x428 drivers/block/loop.c:1122) r5:83964c00 r4:83964c00 [<809fcd10>] (__loop_clr_fd) from [<809fd1dc>] (lo_release+0xa4/0xa8 drivers/block/loop.c:1761) r10:8220c44c r9:5ac3c35a r8:82c84880 r7:839914d4 r6:00000001 r5:83964d2c r4:83964c00 [<809fd138>] (lo_release) from [<80706a7c>] (blkdev_put_whole block/bdev.c:694 [inline]) [<809fd138>] (lo_release) from [<80706a7c>] (blkdev_put+0xd4/0x27c block/bdev.c:956) r7:839914d4 r6:83991480 r5:00000083 r4:82c84880 [<807069a8>] (blkdev_put) from [<80484bd8>] (kill_block_super+0x3c/0x74 fs/super.c:1400) r8:8220c490 r7:8220c920 r6:00000000 r5:00000083 r4:82c84880 [<80484b9c>] (kill_block_super) from [<8048584c>] (deactivate_locked_super+0x54/0xb4 fs/super.c:335) r5:823245b4 r4:85035400 [<804857f8>] (deactivate_locked_super) from [<8048590c>] (deactivate_super fs/super.c:366 [inline]) [<804857f8>] (deactivate_locked_super) from [<8048590c>] (deactivate_super+0x60/0x64 fs/super.c:362) r5:83f2f6c0 r4:85035400 [<804858ac>] (deactivate_super) from [<804a9764>] (cleanup_mnt+0x11c/0x180 fs/namespace.c:1137) r5:83f2f6c0 r4:00000002 [<804a9648>] (cleanup_mnt) from [<804a9838>] (__cleanup_mnt+0x14/0x18 fs/namespace.c:1144) r9:5ac3c35a r8:8354b654 r7:8243d600 r6:8354ae00 r5:8354b624 r4:00000000 [<804a9824>] (__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 r5:843ddfb0 r4:8354ae00 [<8020bbb8>] (do_work_pending) from [<80200088>] (slow_work_pending+0xc/0x20) Exception stack(0x843ddfb0 to 0x843ddff8) dfa0: 00000000 0000000a 00000000 00000000 dfc0: 00085150 7ec37510 00120000 00000034 00085150 02a55fc8 00000000 7ec374d0 dfe0: 7f0302ff 7ec37494 00014734 0004ce3c 60000010 7ec37510 r10:00000034 r9:8354ae00 r8:80200244 r7:00000034 r6:00120000 r5:7ec37510 r4:00085150 INFO: task udevd:14820 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:14820 ppid: 2030 flags:0x00000001 Backtrace: [<81712440>] (__schedule) from [<81712e98>] (schedule+0x54/0xdc kernel/sched/core.c:6326) r10:839914d4 r9:4800005d r8:839914d8 r7:83c13cbc r6:00000002 r5:8354a280 r4:8354a280 [<81712e44>] (schedule) from [<817134b4>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:6385) r5:8354a280 r4:839914d4 [<8171349c>] (schedule_preempt_disabled) from [<817147ec>] (__mutex_lock_common kernel/locking/mutex.c:680 [inline]) [<8171349c>] (schedule_preempt_disabled) from [<817147ec>] (__mutex_lock.constprop.0+0x170/0x54c kernel/locking/mutex.c:740) [<8171467c>] (__mutex_lock.constprop.0) from [<81714c9c>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1028) r9:4800005d r8:00000000 r7:83991480 r6:835ad480 r5:4800005d r4:82c84880 [<81714c88>] (__mutex_lock_slowpath) from [<81714cdc>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:283) [<81714ca0>] (mutex_lock) from [<80707004>] (blkdev_get_by_dev.part.0+0x44/0x2dc block/bdev.c:819) [<80706fc0>] (blkdev_get_by_dev.part.0) from [<807072e4>] (blkdev_get_by_dev+0x48/0x4c block/bdev.c:803) r10:83c13e50 r9:835ad488 r8:80707918 r7:835ad480 r6:835ad480 r5:4800005d r4:00700000 [<8070729c>] (blkdev_get_by_dev) from [<80707970>] (blkdev_open+0x58/0x88 block/fops.c:501) r7:835ad480 r6:00000000 r5:83958d90 r4:835ad480 [<80707918>] (blkdev_open) from [<8047d950>] (do_dentry_open+0x148/0x3f8 fs/open.c:822) r5:83958d90 r4:835ad480 [<8047d808>] (do_dentry_open) from [<8047f640>] (vfs_open+0x34/0x38 fs/open.c:957) r9:83c13f20 r8:00000000 r7:835ad480 r6:82225d20 r5:00000000 r4:00028800 [<8047f60c>] (vfs_open) from [<804936e0>] (do_open fs/namei.c:3426 [inline]) [<8047f60c>] (vfs_open) from [<804936e0>] (path_openat+0x544/0x102c fs/namei.c:3559) [<8049319c>] (path_openat) from [<80495a48>] (do_filp_open+0x84/0x124 fs/namei.c:3586) r10:00000142 r9:8354a280 r8:83c13e50 r7:00000000 r6:8354a280 r5:83c13f20 r4:83c13f58 [<804959c4>] (do_filp_open) from [<8047f930>] (do_sys_openat2+0xa8/0x16c fs/open.c:1212) r8:80200244 r7:ffffff9c r6:00000008 r5:84541000 r4:83c13f58 [<8047f888>] (do_sys_openat2) from [<8047fdcc>] (do_sys_open fs/open.c:1228 [inline]) [<8047f888>] (do_sys_openat2) from [<8047fdcc>] (__do_sys_openat fs/open.c:1244 [inline]) [<8047f888>] (do_sys_openat2) from [<8047fdcc>] (sys_openat+0xa4/0xcc fs/open.c:1239) r7:00000142 r6:00b24098 r5:00b03af0 r4:ffffff9c [<8047fd28>] (sys_openat) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0x83c13fa8 to 0x83c13ff0) 3fa0: 00b1d248 76f58840 ffffff9c 00b03af0 000a8800 00000000 3fc0: 00b1d248 76f58840 00b24098 00000142 000563e8 00af7190 00000000 00b1d248 3fe0: 000561b4 7e882438 000166d8 76c22350 r5:76f58840 r4:00b1d248 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: [<816f5710>] (dump_backtrace) from [<816f58fc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:237) r7:00000001 r6:00000000 r5:600b0093 r4:81d60190 [<816f58e4>] (show_stack) from [<816fe354>] (__dump_stack lib/dump_stack.c:88 [inline]) [<816f58e4>] (show_stack) from [<816fe354>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<816fe30c>] (dump_stack_lvl) from [<816fe378>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:000b0013 r4:00000001 [<816fe360>] (dump_stack) from [<8083cdac>] (nmi_cpu_backtrace+0x114/0x180 lib/nmi_backtrace.c:111) [<8083cc98>] (nmi_cpu_backtrace) from [<8083cf30>] (nmi_trigger_cpumask_backtrace+0x118/0x1d4 lib/nmi_backtrace.c:62) r7:00000001 r6:8220c494 r5:8220cc70 r4:00000000 [<8083ce18>] (nmi_trigger_cpumask_backtrace) from [<80210c54>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:865) r9:00023ac0 r8:82204d00 r7:00007f68 r6:824839b0 r5:8220c5d4 r4:82ba2640 [<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: 2015 Comm: syslogd Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express PC is at 0x76e7f7bc LR is at 0x19aa8 pc : [<76e7f7bc>] lr : [<00019aa8>] psr: 600f0010 sp : 7e8dcbb0 ip : 000d63bc fp : 7e8dcc9c r10: 000d6c90 r9 : 000d6cb0 r8 : 000d6c84 r7 : 00000004 r6 : 76f5b080 r5 : 01a3f4b8 r4 : 00000003 r3 : 00000000 r2 : 00000091 r1 : 01a3f4b8 r0 : 00000091 Flags: nZCv IRQs on FIQs on Mode USER_32 ISA ARM Segment user Control: 30c5387d Table: 83745ac0 DAC: fffffffd CPU: 0 PID: 2015 Comm: syslogd Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: [<816f5710>] (dump_backtrace) from [<816f58fc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:237) r7:00000017 r6:835abfb0 r5:600f0193 r4:81d60190 [<816f58e4>] (show_stack) from [<816fe354>] (__dump_stack lib/dump_stack.c:88 [inline]) [<816f58e4>] (show_stack) from [<816fe354>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<816fe30c>] (dump_stack_lvl) from [<816fe378>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:000f0193 r4:00000000 [<816fe360>] (dump_stack) from [<80209080>] (show_regs+0x14/0x18 arch/arm/kernel/process.c:199) [<8020906c>] (show_regs) from [<8083cd94>] (nmi_cpu_backtrace+0xfc/0x180 lib/nmi_backtrace.c:109) [<8083cc98>] (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) r9:000d6cb0 r8:835abf18 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) r10:000d6c90 r9:000d6cb0 r8:00000000 r7:df80200c r6:836dae00 r5:00000007 r4:82888000 r3:802b94bc [<802b2b80>] (generic_handle_domain_irq) from [<8084fac4>] (gic_handle_irq+0x68/0x7c drivers/irqchip/irq-gic.c:372) r7:df80200c r6:820a5fc4 r5:df802000 r4:8220cc8c [<8084fa5c>] (gic_handle_irq) from [<817102a4>] (generic_handle_arch_irq+0x60/0x80 kernel/irq/handle.c:243) r7:835abfb0 r6:81f092d4 r5:81f092ec r4:820a5fb8 [<81710244>] (generic_handle_arch_irq) from [<80200dbc>] (__irq_usr+0x5c/0x80 arch/arm/kernel/entry-armv.S:429) Exception stack(0x835abfb0 to 0x835abff8) bfa0: 00000091 01a3f4b8 00000091 00000000 bfc0: 00000003 01a3f4b8 76f5b080 00000004 000d6c84 000d6cb0 000d6c90 7e8dcc9c bfe0: 000d63bc 7e8dcbb0 00019aa8 76e7f7bc 600f0010 ffffffff r9:000d6cb0 r8:5bd2d000 r7:836dae00 r6:ffffffff r5:600f0010 r4:76e7f7bc