INFO: task syz-executor.0:2236 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: 2236 ppid: 1 flags:0x00000001 Backtrace: [<816d5388>] (__schedule) from [<816d5de0>] (schedule+0x54/0xdc kernel/sched/core.c:6326) r10:838b452c r9:5ac3c35a r8:83101100 r7:835c0ad4 r6:00000001 r5:838e96c8 r4:83f72e00 [<816d5d8c>] (schedule) from [<8071ae2c>] (blk_mq_freeze_queue_wait+0x6c/0xa4 block/blk-mq.c:178) r5:838e96c8 r4:838e9b30 [<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) r5:838b4400 r4:838e96c0 [<8071dd84>] (blk_mq_freeze_queue) from [<809bf8dc>] (__loop_clr_fd+0x6c/0x428 drivers/block/loop.c:1122) r5:838b4400 r4:838b4400 [<809bf870>] (__loop_clr_fd) from [<809bfd3c>] (lo_release+0xa4/0xa8 drivers/block/loop.c:1761) r10:8220c44c r9:5ac3c35a r8:83101100 r7:835c0ad4 r6:00000001 r5:838b452c r4:838b4400 [<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) r7:835c0ad4 r6:835c0a80 r5:00000083 r4:83101100 [<80706bb0>] (blkdev_put) from [<80484de0>] (kill_block_super+0x3c/0x74 fs/super.c:1400) r8:8220c490 r7:8220c920 r6:00000000 r5:00000083 r4:83101100 [<80484da4>] (kill_block_super) from [<80485a54>] (deactivate_locked_super+0x54/0xb4 fs/super.c:335) r5:82317c48 r4:85013800 [<80485a00>] (deactivate_locked_super) from [<80485b14>] (deactivate_super fs/super.c:366 [inline]) [<80485a00>] (deactivate_locked_super) from [<80485b14>] (deactivate_super+0x60/0x64 fs/super.c:362) r5:84660300 r4:85013800 [<80485ab4>] (deactivate_super) from [<804a996c>] (cleanup_mnt+0x11c/0x180 fs/namespace.c:1137) r5:84660300 r4:00000002 [<804a9850>] (cleanup_mnt) from [<804a9a40>] (__cleanup_mnt+0x14/0x18 fs/namespace.c:1144) r9:5ac3c35a r8:83f73654 r7:8243d600 r6:83f72e00 r5:83f73624 r4:00000000 [<804a9a2c>] (__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 r5:84c75fb0 r4:83f72e00 [<8020bbb8>] (do_work_pending) from [<80200088>] (slow_work_pending+0xc/0x20) Exception stack(0x84c75fb0 to 0x84c75ff8) 5fa0: 00000000 0000000a 00000000 00000000 5fc0: 00085150 7ea98510 00120000 00000034 00085150 02b14fc8 000001f4 7ea99604 5fe0: 7f0302ff 7ea98494 00014734 0004ce3c 60000010 7ea98510 r10:00000034 r9:83f72e00 r8:80200244 r7:00000034 r6:00120000 r5:7ea98510 r4:00085150 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: [<816b8658>] (dump_backtrace) from [<816b8844>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:237) r7:00000000 r6:00000000 r5:600f0193 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) r5:000f0113 r4:00000000 [<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) r7:00000000 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) r9:000d3a80 r8:82204d00 r7:00007f6a r6:824839b0 r5:8220c5d4 r4:82b95140 [<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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 2020 Comm: klogd Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express PC is at skb_put+0x1c/0x58 net/core/skbuff.c:1988 LR is at unix_dgram_sendmsg+0x340/0x8f4 net/unix/af_unix.c:1821 pc : [<8126bd48>] lr : [<814e843c>] psr: 600f0013 sp : 835a7de0 ip : 835a7df8 fp : 835a7df4 r10: 845d1e40 r9 : 00000000 r8 : 82be3900 r7 : 82be3c00 r6 : 00000000 r5 : 8305cf00 r4 : 84094600 r3 : 814ea9b0 r2 : 00000000 r1 : 0000007f r0 : 845d1e40 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none Control: 30c5387d Table: 8434ca00 DAC: 00000000 CPU: 1 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 r6:835a7d90 r5:600f0193 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) r5:000f0193 r4:00000001 [<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 r6:00000001 r5:8280cb80 r4:00000007 [<8020fd0c>] (do_handle_IPI) from [<802100e0>] (ipi_handler+0x20/0x28 arch/arm/kernel/smp.c:708) r9:834fe780 r8:835a7cf8 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) r10:845d1e40 r9:834fe780 r8:00000000 r7:df80200c r6:834fe780 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) r7:835a7d90 r6:81f094b4 r5:81f094cc r4:820a5fb8 [<816d318c>] (generic_handle_arch_irq) from [<80200abc>] (__irq_svc+0x3c/0x64 arch/arm/kernel/entry-armv.S:202) Exception stack(0x835a7d90 to 0x835a7dd8) 7d80: 845d1e40 0000007f 00000000 814ea9b0 7da0: 84094600 8305cf00 00000000 82be3c00 82be3900 00000000 845d1e40 835a7df4 7dc0: 835a7df8 835a7de0 814e843c 8126bd48 600f0013 ffffffff r9:834fe780 r8:82be3900 r7:835a7dc4 r6:ffffffff r5:600f0013 r4:8126bd48 [<8126bd2c>] (skb_put) from [<814e843c>] (unix_dgram_sendmsg+0x340/0x8f4 net/unix/af_unix.c:1821) r5:8305cf00 r4:835a7eb0 [<814e80fc>] (unix_dgram_sendmsg) from [<812608e0>] (sock_sendmsg_nosec net/socket.c:704 [inline]) [<814e80fc>] (unix_dgram_sendmsg) from [<812608e0>] (sock_sendmsg+0x3c/0x4c net/socket.c:724) r10:00000121 r9:834fe780 r8:80200244 r7:00004000 r6:00000000 r5:8305cf00 r4:835a7eb0 [<812608a4>] (sock_sendmsg) from [<8126282c>] (__sys_sendto+0xcc/0x118 net/socket.c:2036) r5:8305cf00 r4:00000000 [<81262760>] (__sys_sendto) from [<812628bc>] (__do_sys_send net/socket.c:2058 [inline]) [<81262760>] (__sys_sendto) from [<812628bc>] (sys_send+0x20/0x28 net/socket.c:2055) r7:00000121 r6:00000001 r5:76f67080 r4:00ec7190 [<8126289c>] (sys_send) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0x835a7fa8 to 0x835a7ff0) 7fa0: 00ec7190 76f67080 00000003 00ed02f0 0000007f 00004000 7fc0: 00ec7190 76f67080 00000001 00000121 7e890cc0 00000000 76f67080 00000000 7fe0: 00000000 7e890bf8 76e98b88 76e9de78