INFO: task udevd:21238 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:21238 ppid: 2033 flags:0x00000001 Backtrace: [<81712400>] (__schedule) from [<81712e58>] (schedule+0x54/0xdc kernel/sched/core.c:6326) r10:837fb32c r9:5ac3c35a r8:837a4d90 r7:8391c4d4 r6:00000001 r5:82b35b08 r4:86108b80 [<81712e04>] (schedule) from [<8071abf4>] (blk_mq_freeze_queue_wait+0x6c/0xa4 block/blk-mq.c:178) r5:82b35b08 r4:82b35f70 [<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) r5:837fb200 r4:82b35b00 [<8071db4c>] (blk_mq_freeze_queue) from [<809fcd3c>] (__loop_clr_fd+0x6c/0x428 drivers/block/loop.c:1122) r5:837fb200 r4:837fb200 [<809fccd0>] (__loop_clr_fd) from [<809fd19c>] (lo_release+0xa4/0xa8 drivers/block/loop.c:1761) r10:8220c44c r9:5ac3c35a r8:837a4d90 r7:8391c4d4 r6:00000001 r5:837fb32c r4:837fb200 [<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) r7:8391c4d4 r6:8391c480 r5:480a005d r4:82c84880 [<80706978>] (blkdev_put) from [<807078e0>] (blkdev_close+0x18/0x20 block/fops.c:515) r8:837a4d90 r7:82c16908 r6:83821cd0 r5:480a005d r4:85fbef00 [<807078c8>] (blkdev_close) from [<8048414c>] (__fput+0x84/0x258 fs/file_table.c:280) [<804840c8>] (__fput) from [<8048439c>] (____fput+0x10/0x14 fs/file_table.c:313) r9:5ac3c35a r8:861093d4 r7:8243d600 r6:86108b80 r5:861093a4 r4:00000000 [<8048438c>] (____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 r5:83eeffb0 r4:86108b80 [<8020bbb8>] (do_work_pending) from [<80200088>] (slow_work_pending+0xc/0x20) Exception stack(0x83eeffb0 to 0x83eefff8) ffa0: 00000000 7eedac48 00000003 00000000 ffc0: 76fe487c 76fe4840 00000002 00000006 000563e8 01d3d190 00000008 000563f8 ffe0: 000561f4 7eedb448 0002d6d0 76caf380 600f0010 00000008 r10:00000006 r9:86108b80 r8:80200244 r7:00000006 r6:00000002 r5:76fe4840 r4:76fe487c INFO: task syz-executor.0:21246 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:21246 ppid: 3920 flags:0x00000001 Backtrace: [<81712400>] (__schedule) from [<81712e58>] (schedule+0x54/0xdc kernel/sched/core.c:6326) r10:8391c4d4 r9:4800001f r8:8391c4d8 r7:862edcbc r6:00000002 r5:86207300 r4:86207300 [<81712e04>] (schedule) from [<81713474>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:6385) r5:86207300 r4:8391c4d4 [<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) r9:4800001f r8:00000000 r7:8391c480 r6:862fae40 r5:4800001f r4:82c84880 [<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) r10:862ede50 r9:862fae48 r8:807078e8 r7:862fae40 r6:862fae40 r5:4800001f r4:00700000 [<8070726c>] (blkdev_get_by_dev) from [<80707940>] (blkdev_open+0x58/0x88 block/fops.c:501) r7:862fae40 r6:00000000 r5:83821cd0 r4:862fae40 [<807078e8>] (blkdev_open) from [<8047d928>] (do_dentry_open+0x148/0x3f8 fs/open.c:822) r5:83821cd0 r4:862fae40 [<8047d7e0>] (do_dentry_open) from [<8047f618>] (vfs_open+0x34/0x38 fs/open.c:957) r9:862edf20 r8:00000000 r7:862fae40 r6:82225d20 r5:00000000 r4:00000002 [<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 r9:86207300 r8:862ede50 r7:00000001 r6:86207300 r5:862edf20 r4:862edf58 [<8049599c>] (do_filp_open) from [<8047f908>] (do_sys_openat2+0xa8/0x16c fs/open.c:1212) r8:80200244 r7:ffffff9c r6:00000004 r5:829a9000 r4:862edf58 [<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 r6:76fdcee0 r5:76fdcee0 r4:ffffff9c [<8047fd00>] (sys_openat) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0x862edfa8 to 0x862edff0) dfa0: 20000248 76fddb90 ffffff9c 76fdcee0 00000002 00000000 dfc0: 20000248 76fddb90 76fdcee0 00000142 00000003 00000000 00085104 00000000 dfe0: 00000000 76fdce50 00028e6c 00029680 r5:76fddb90 r4:20000248 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 r5:60000093 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) r5:00000013 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) r9:000aa4c0 r8:82204d00 r7:00007f3d r6:824839b0 r5:8220c5d4 r4:83e82940 [<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 r6:82af1600 r5:82af15c0 r4:828f2e00 [<8026a3b4>] (kthread) from [<80200100>] (ret_from_fork+0x14/0x34 arch/arm/kernel/entry-common.S:146) Exception stack(0x82a21fb0 to 0x82a21ff8) 1fa0: 00000000 00000000 00000000 00000000 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8026a3b4 r4:82af15c0 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 2018 Comm: syslogd Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express PC is at _compound_head include/linux/page-flags.h:198 [inline] PC is at check_heap_object mm/usercopy.c:236 [inline] PC is at __check_object_size mm/usercopy.c:286 [inline] PC is at __check_object_size+0x14c/0x208 mm/usercopy.c:256 LR is at kmap_to_page include/linux/highmem-internal.h:63 [inline] LR is at check_heap_object mm/usercopy.c:236 [inline] LR is at __check_object_size mm/usercopy.c:286 [inline] LR is at __check_object_size+0x14c/0x208 mm/usercopy.c:256 pc : [<8047b274>] lr : [<8047b274>] psr: 000c0013 sp : 84285ce0 ip : 84285ce0 fp : 84285d14 r10: 83d60300 r9 : 00000074 r8 : 00000074 r7 : 86c75674 r6 : 00000001 r5 : 00000074 r4 : 86c75600 r3 : dddf9000 r2 : 00000024 r1 : 8248c7b8 r0 : ddeed074 Flags: nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none Control: 30c5387d Table: 84320940 DAC: 00000000 CPU: 1 PID: 2018 Comm: syslogd 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 r6:84285c90 r5:600c0193 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) r5:000c0193 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) r9:83f72e00 r8:84285bf8 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) r10:83d60300 r9:83f72e00 r8:00000000 r7:df80200c r6:83f72e00 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) r7:84285c90 r6:81f092c0 r5:81f092d8 r4:820a5fb8 [<81710204>] (generic_handle_arch_irq) from [<80200abc>] (__irq_svc+0x3c/0x64 arch/arm/kernel/entry-armv.S:202) Exception stack(0x84285c90 to 0x84285cd8) 5c80: ddeed074 8248c7b8 00000024 dddf9000 5ca0: 86c75600 00000074 00000001 86c75674 00000074 00000074 83d60300 84285d14 5cc0: 84285ce0 84285ce0 8047b274 8047b274 000c0013 ffffffff r9:83f72e00 r8:00000074 r7:84285cc4 r6:ffffffff r5:000c0013 r4:8047b274 [<8047b128>] (__check_object_size) from [<812b4908>] (check_object_size include/linux/thread_info.h:185 [inline]) [<8047b128>] (__check_object_size) from [<812b4908>] (check_copy_size include/linux/thread_info.h:218 [inline]) [<8047b128>] (__check_object_size) from [<812b4908>] (copy_to_iter include/linux/uio.h:152 [inline]) [<8047b128>] (__check_object_size) from [<812b4908>] (simple_copy_to_iter+0x24/0x7c net/core/datagram.c:519) r10:83d60300 r9:00000074 r8:00000074 r7:00000000 r6:84285e78 r5:86c75600 r4:00000074 [<812b48e4>] (simple_copy_to_iter) from [<812b4294>] (__skb_datagram_iter+0x68/0x2ec net/core/datagram.c:425) r7:00000000 r6:00000074 r5:00000074 r4:00000074 [<812b422c>] (__skb_datagram_iter) from [<812b4598>] (skb_copy_datagram_iter+0x4c/0xfc net/core/datagram.c:533) r10:00000000 r9:00000074 r8:00000074 r7:84285e78 r6:00000000 r5:00000074 r4:83d60300 [<812b454c>] (skb_copy_datagram_iter) from [<81525dc0>] (skb_copy_datagram_msg include/linux/skbuff.h:3657 [inline]) [<812b454c>] (skb_copy_datagram_iter) from [<81525dc0>] (__unix_dgram_recvmsg+0x17c/0x3b0 net/unix/af_unix.c:2342) r9:00000074 r8:00000074 r7:00000000 r6:82a83b3c r5:82a83900 r4:83d60300 [<81525c44>] (__unix_dgram_recvmsg) from [<81526048>] (unix_dgram_recvmsg+0x54/0x5c net/unix/af_unix.c:2401) r10:00000000 r9:83f72e00 r8:00000000 r7:00000000 r6:82c44c80 r5:81525ff4 r4:823bf3a0 [<81525ff4>] (unix_dgram_recvmsg) from [<8129e5c8>] (sock_recvmsg_nosec net/socket.c:944 [inline]) [<81525ff4>] (unix_dgram_recvmsg) from [<8129e5c8>] (sock_recvmsg net/socket.c:962 [inline]) [<81525ff4>] (unix_dgram_recvmsg) from [<8129e5c8>] (sock_recvmsg net/socket.c:958 [inline]) [<81525ff4>] (unix_dgram_recvmsg) from [<8129e5c8>] (sock_read_iter+0xfc/0x12c net/socket.c:1035) r4:84285ef0 [<8129e4cc>] (sock_read_iter) from [<8048274c>] (call_read_iter include/linux/fs.h:2156 [inline]) [<8129e4cc>] (sock_read_iter) from [<8048274c>] (new_sync_read fs/read_write.c:400 [inline]) [<8129e4cc>] (sock_read_iter) from [<8048274c>] (vfs_read+0x2e8/0x314 fs/read_write.c:481) r7:00004004 r6:83dbd780 r5:00000000 r4:000000ff [<80482464>] (vfs_read) from [<80482c70>] (ksys_read+0xb4/0xec fs/read_write.c:619) r10:00000003 r9:83f72e00 r8:80200244 r7:000000ff r6:002bd1b8 r5:83dbd780 r4:83dbd780 [<80482bbc>] (ksys_read) from [<80482cb8>] (__do_sys_read fs/read_write.c:629 [inline]) [<80482bbc>] (ksys_read) from [<80482cb8>] (sys_read+0x10/0x14 fs/read_write.c:627) r7:00000003 r6:76f1b080 r5:002bd190 r4:fffffc00 [<80482ca8>] (sys_read) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0x84285fa8 to 0x84285ff0) 5fa0: fffffc00 002bd190 00000000 002bd1b8 000000ff 00000000 5fc0: fffffc00 002bd190 76f1b080 00000003 00000000 000d6c90 000d6c90 00000000 5fe0: 000d609c 7ebd4c88 000579b8 76e3f6f8