INFO: task syz-executor.0:2237 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: 2237 ppid: 1 flags:0x00000001 Backtrace: [<816d5518>] (__schedule) from [<816d5f70>] (schedule+0x54/0xdc kernel/sched/core.c:6326) r10:8377e52c r9:5ac3c35a r8:83104440 r7:83853e94 r6:00000001 r5:8371db08 r4:829c1700 [<816d5f1c>] (schedule) from [<8071aedc>] (blk_mq_freeze_queue_wait+0x6c/0xa4 block/blk-mq.c:178) r5:8371db08 r4:8371df70 [<8071ae70>] (blk_mq_freeze_queue_wait) from [<8071de50>] (blk_freeze_queue block/blk-mq.c:205 [inline]) [<8071ae70>] (blk_mq_freeze_queue_wait) from [<8071de50>] (blk_mq_freeze_queue+0x1c/0x20 block/blk-mq.c:214) r5:8377e400 r4:8371db00 [<8071de34>] (blk_mq_freeze_queue) from [<809bf9e4>] (__loop_clr_fd+0x6c/0x428 drivers/block/loop.c:1122) r5:8377e400 r4:8377e400 [<809bf978>] (__loop_clr_fd) from [<809bfe44>] (lo_release+0xa4/0xa8 drivers/block/loop.c:1761) r10:8220c44c r9:5ac3c35a r8:83104440 r7:83853e94 r6:00000001 r5:8377e52c r4:8377e400 [<809bfda0>] (lo_release) from [<80706d34>] (blkdev_put_whole block/bdev.c:694 [inline]) [<809bfda0>] (lo_release) from [<80706d34>] (blkdev_put+0xd4/0x27c block/bdev.c:956) r7:83853e94 r6:83853e40 r5:00000083 r4:83104440 [<80706c60>] (blkdev_put) from [<80484e90>] (kill_block_super+0x3c/0x74 fs/super.c:1400) r8:8220c490 r7:8220c920 r6:00000000 r5:00000083 r4:83104440 [<80484e54>] (kill_block_super) from [<80485b04>] (deactivate_locked_super+0x54/0xb4 fs/super.c:335) r5:823245b4 r4:8530e400 [<80485ab0>] (deactivate_locked_super) from [<80485bc4>] (deactivate_super fs/super.c:366 [inline]) [<80485ab0>] (deactivate_locked_super) from [<80485bc4>] (deactivate_super+0x60/0x64 fs/super.c:362) r5:85094480 r4:8530e400 [<80485b64>] (deactivate_super) from [<804a9a1c>] (cleanup_mnt+0x11c/0x180 fs/namespace.c:1137) r5:85094480 r4:00000002 [<804a9900>] (cleanup_mnt) from [<804a9af0>] (__cleanup_mnt+0x14/0x18 fs/namespace.c:1144) r9:5ac3c35a r8:829c1f54 r7:8243d600 r6:829c1700 r5:829c1f24 r4:00000000 [<804a9adc>] (__cleanup_mnt) from [<80266ed8>] (task_work_run+0x8c/0xb8 kernel/task_work.c:164) [<80266e4c>] (task_work_run) from [<8020bff0>] (tracehook_notify_resume include/linux/tracehook.h:189 [inline]) [<80266e4c>] (task_work_run) from [<8020bff0>] (do_work_pending+0x438/0x53c arch/arm/kernel/signal.c:630) r9:5ac3c35a r8:80200244 r7:fffffe30 r6:80200244 r5:84263fb0 r4:829c1700 [<8020bbb8>] (do_work_pending) from [<80200088>] (slow_work_pending+0xc/0x20) Exception stack(0x84263fb0 to 0x84263ff8) 3fa0: 00000000 0000000a 00000000 00000000 3fc0: 00085150 7ee45510 00120000 00000034 00085150 02168fc8 00000000 7ee454d0 3fe0: 7f0302ff 7ee45494 00014734 0004ce3c 60000010 7ee45510 r10:00000034 r9:829c1700 r8:80200244 r7:00000034 r6:00120000 r5:7ee45510 r4:00085150 INFO: task udevd:18299 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:18299 ppid: 2032 flags:0x00000001 Backtrace: [<816d5518>] (__schedule) from [<816d5f70>] (schedule+0x54/0xdc kernel/sched/core.c:6326) r10:83853e94 r9:4800005d r8:83853e98 r7:836b1cbc r6:00000002 r5:84305080 r4:84305080 [<816d5f1c>] (schedule) from [<816d658c>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:6385) r5:84305080 r4:83853e94 [<816d6574>] (schedule_preempt_disabled) from [<816d78c4>] (__mutex_lock_common kernel/locking/mutex.c:680 [inline]) [<816d6574>] (schedule_preempt_disabled) from [<816d78c4>] (__mutex_lock.constprop.0+0x170/0x54c kernel/locking/mutex.c:740) [<816d7754>] (__mutex_lock.constprop.0) from [<816d7d74>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1028) r9:4800005d r8:00000000 r7:83853e40 r6:850943c0 r5:4800005d r4:83104440 [<816d7d60>] (__mutex_lock_slowpath) from [<816d7db4>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:283) [<816d7d78>] (mutex_lock) from [<807072bc>] (blkdev_get_by_dev.part.0+0x44/0x2dc block/bdev.c:819) [<80707278>] (blkdev_get_by_dev.part.0) from [<8070759c>] (blkdev_get_by_dev+0x48/0x4c block/bdev.c:803) r10:836b1e50 r9:850943c8 r8:80707bd0 r7:850943c0 r6:850943c0 r5:4800005d r4:00700000 [<80707554>] (blkdev_get_by_dev) from [<80707c28>] (blkdev_open+0x58/0x88 block/fops.c:501) r7:850943c0 r6:00000000 r5:83409cd0 r4:850943c0 [<80707bd0>] (blkdev_open) from [<8047dc08>] (do_dentry_open+0x148/0x3f8 fs/open.c:822) r5:83409cd0 r4:850943c0 [<8047dac0>] (do_dentry_open) from [<8047f8f8>] (vfs_open+0x34/0x38 fs/open.c:957) r9:836b1f20 r8:00000000 r7:850943c0 r6:82225d20 r5:00000000 r4:00028800 [<8047f8c4>] (vfs_open) from [<80493998>] (do_open fs/namei.c:3426 [inline]) [<8047f8c4>] (vfs_open) from [<80493998>] (path_openat+0x544/0x102c fs/namei.c:3559) [<80493454>] (path_openat) from [<80495d00>] (do_filp_open+0x84/0x124 fs/namei.c:3586) r10:00000142 r9:84305080 r8:836b1e50 r7:00000000 r6:84305080 r5:836b1f20 r4:836b1f58 [<80495c7c>] (do_filp_open) from [<8047fbe8>] (do_sys_openat2+0xa8/0x16c fs/open.c:1212) r8:80200244 r7:ffffff9c r6:00000008 r5:829ad000 r4:836b1f58 [<8047fb40>] (do_sys_openat2) from [<80480084>] (do_sys_open fs/open.c:1228 [inline]) [<8047fb40>] (do_sys_openat2) from [<80480084>] (__do_sys_openat fs/open.c:1244 [inline]) [<8047fb40>] (do_sys_openat2) from [<80480084>] (sys_openat+0xa4/0xcc fs/open.c:1239) r7:00000142 r6:00a447e0 r5:00a478d8 r4:ffffff9c [<8047ffe0>] (sys_openat) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0x836b1fa8 to 0x836b1ff0) 1fa0: 00a44b20 76f8e840 ffffff9c 00a478d8 000a8800 00000000 1fc0: 00a44b20 76f8e840 00a447e0 00000142 000563e8 00a3c190 00000000 00a44b20 1fe0: 000561b4 7e9f5438 000166d8 76c58350 r5:76f8e840 r4:00a44b20 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: [<816b87e8>] (dump_backtrace) from [<816b89d4>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:237) r7:00000000 r6:00000000 r5:600f0093 r4:81d6057c [<816b89bc>] (show_stack) from [<816c142c>] (__dump_stack lib/dump_stack.c:88 [inline]) [<816b89bc>] (show_stack) from [<816c142c>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<816c13e4>] (dump_stack_lvl) from [<816c1450>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:000f0013 r4:00000000 [<816c1438>] (dump_stack) from [<807ff9ac>] (nmi_cpu_backtrace+0x114/0x180 lib/nmi_backtrace.c:111) [<807ff898>] (nmi_cpu_backtrace) from [<807ffb30>] (nmi_trigger_cpumask_backtrace+0x118/0x1d4 lib/nmi_backtrace.c:62) r7:00000000 r6:8220c494 r5:8220cc70 r4:00000000 [<807ffa18>] (nmi_trigger_cpumask_backtrace) from [<80210c54>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:865) r9:0003afc0 r8:82204d00 r7:00007f69 r6:824839b0 r5:8220c5d4 r4:83fb8840 [<80210c3c>] (arch_trigger_cpumask_backtrace) from [<8032a05c>] (trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]) [<80210c3c>] (arch_trigger_cpumask_backtrace) from [<8032a05c>] (check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]) [<80210c3c>] (arch_trigger_cpumask_backtrace) from [<8032a05c>] (watchdog+0x4a0/0x58c kernel/hung_task.c:295) [<80329bbc>] (watchdog) from [<8026a5cc>] (kthread+0x164/0x198 kernel/kthread.c:327) r10:8294de4c r9:00000000 r8:00000000 r7:80329bbc r6:828cf180 r5:82a89240 r4:828f2e00 [<8026a468>] (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 r5:8026a468 r4:82a89240 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 2017 Comm: syslogd Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express PC is at __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] PC is at _raw_spin_unlock_irqrestore+0x28/0x54 kernel/locking/spinlock.c:194 LR is at spin_unlock_irqrestore include/linux/spinlock.h:404 [inline] LR is at __skb_try_recv_datagram+0x110/0x1a4 net/core/datagram.c:267 pc : [<816dc740>] lr : [<81278000>] psr: 80070013 sp : 842f3d70 ip : 842f3d80 fp : 842f3d7c r10: 842f3dfc r9 : 00000000 r8 : 842f3df4 r7 : 83fb98a8 r6 : 83fb989c r5 : 841f53c0 r4 : 83fb9800 r3 : 00000e5b r2 : 00000000 r1 : 60070013 r0 : 83fb98a8 Flags: Nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none Control: 30c5387d Table: 841420c0 DAC: 00000000 CPU: 1 PID: 2017 Comm: syslogd Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: [<816b87e8>] (dump_backtrace) from [<816b89d4>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:237) r7:00000017 r6:842f3d20 r5:60070193 r4:81d6057c [<816b89bc>] (show_stack) from [<816c142c>] (__dump_stack lib/dump_stack.c:88 [inline]) [<816b89bc>] (show_stack) from [<816c142c>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<816c13e4>] (dump_stack_lvl) from [<816c1450>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:00070193 r4:00000001 [<816c1438>] (dump_stack) from [<80209080>] (show_regs+0x14/0x18 arch/arm/kernel/process.c:199) [<8020906c>] (show_regs) from [<807ff994>] (nmi_cpu_backtrace+0xfc/0x180 lib/nmi_backtrace.c:109) [<807ff898>] (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) r9:83ed2e00 r8:842f3c88 r7:00000017 r6:8220cc8c r5:8280cb80 r4:82885d00 [<802100c0>] (ipi_handler) from [<802b9610>] (handle_percpu_devid_irq+0x9c/0x2d4 kernel/irq/chip.c:933) [<802b9574>] (handle_percpu_devid_irq) from [<802b2c80>] (generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]) [<802b9574>] (handle_percpu_devid_irq) from [<802b2c80>] (handle_irq_desc kernel/irq/irqdesc.c:646 [inline]) [<802b9574>] (handle_percpu_devid_irq) from [<802b2c80>] (generic_handle_domain_irq+0x48/0x8c kernel/irq/irqdesc.c:680) r10:842f3dfc r9:83ed2e00 r8:00000000 r7:df80200c r6:83ed2e00 r5:00000007 r4:82888000 r3:802b9574 [<802b2c38>] (generic_handle_domain_irq) from [<808126c4>] (gic_handle_irq+0x68/0x7c drivers/irqchip/irq-gic.c:372) r7:df80200c r6:820a5fc4 r5:df802000 r4:8220cc8c [<8081265c>] (gic_handle_irq) from [<816d337c>] (generic_handle_arch_irq+0x60/0x80 kernel/irq/handle.c:243) r7:842f3d20 r6:81f09748 r5:81f09760 r4:820a5fb8 [<816d331c>] (generic_handle_arch_irq) from [<80200abc>] (__irq_svc+0x3c/0x64 arch/arm/kernel/entry-armv.S:202) Exception stack(0x842f3d20 to 0x842f3d68) 3d20: 83fb98a8 60070013 00000000 00000e5b 83fb9800 841f53c0 83fb989c 83fb98a8 3d40: 842f3df4 00000000 842f3dfc 842f3d7c 842f3d80 842f3d70 81278000 816dc740 3d60: 80070013 ffffffff r9:83ed2e00 r8:842f3df4 r7:842f3d54 r6:ffffffff r5:80070013 r4:816dc740 [<816dc718>] (_raw_spin_unlock_irqrestore) from [<81278000>] (spin_unlock_irqrestore include/linux/spinlock.h:404 [inline]) [<816dc718>] (_raw_spin_unlock_irqrestore) from [<81278000>] (__skb_try_recv_datagram+0x110/0x1a4 net/core/datagram.c:267) [<81277ef0>] (__skb_try_recv_datagram) from [<814e8ce8>] (__unix_dgram_recvmsg+0xe4/0x3b0 net/unix/af_unix.c:2303) r10:00000000 r9:83fb989c r8:842f3e00 r7:00000000 r6:83fb9a3c r5:83fb9800 r4:823bf3a0 [<814e8c04>] (__unix_dgram_recvmsg) from [<814e9008>] (unix_dgram_recvmsg+0x54/0x5c net/unix/af_unix.c:2401) r10:00000000 r9:83ed2e00 r8:00000000 r7:00000000 r6:8305ca00 r5:814e8fb4 r4:823bf3a0 [<814e8fb4>] (unix_dgram_recvmsg) from [<81261370>] (sock_recvmsg_nosec net/socket.c:944 [inline]) [<814e8fb4>] (unix_dgram_recvmsg) from [<81261370>] (sock_recvmsg net/socket.c:962 [inline]) [<814e8fb4>] (unix_dgram_recvmsg) from [<81261370>] (sock_recvmsg net/socket.c:958 [inline]) [<814e8fb4>] (unix_dgram_recvmsg) from [<81261370>] (sock_read_iter+0xfc/0x12c net/socket.c:1035) r4:842f3ef0 [<81261274>] (sock_read_iter) from [<80482a2c>] (call_read_iter include/linux/fs.h:2156 [inline]) [<81261274>] (sock_read_iter) from [<80482a2c>] (new_sync_read fs/read_write.c:400 [inline]) [<81261274>] (sock_read_iter) from [<80482a2c>] (vfs_read+0x2e8/0x314 fs/read_write.c:481) r7:00004004 r6:83e6e300 r5:00000000 r4:000000ff [<80482744>] (vfs_read) from [<80482f50>] (ksys_read+0xb4/0xec fs/read_write.c:619) r10:00000003 r9:83ed2e00 r8:80200244 r7:000000ff r6:00fe61b8 r5:83e6e300 r4:83e6e300 [<80482e9c>] (ksys_read) from [<80482f98>] (__do_sys_read fs/read_write.c:629 [inline]) [<80482e9c>] (ksys_read) from [<80482f98>] (sys_read+0x10/0x14 fs/read_write.c:627) r7:00000003 r6:76f12080 r5:00fe6190 r4:fffffc00 [<80482f88>] (sys_read) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0x842f3fa8 to 0x842f3ff0) 3fa0: fffffc00 00fe6190 00000000 00fe61b8 000000ff 00000000 3fc0: fffffc00 00fe6190 76f12080 00000003 00000000 000d6c90 000d6c90 00000000 3fe0: 000d609c 7ed9cc88 000579b8 76e366f8