INFO: task syz-executor.0:27005 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:27005 ppid: 2234 flags:0x00000001 Backtrace: [<81712400>] (__schedule) from [<81712e58>] (schedule+0x54/0xdc kernel/sched/core.c:6326) r10:8391ef78 r9:852fd700 r8:84988a00 r7:83a39900 r6:83a39900 r5:83a038e8 r4:8536d080 [<81712e04>] (schedule) from [<8071abf4>] (blk_mq_freeze_queue_wait+0x6c/0xa4 block/blk-mq.c:178) r5:83a038e8 r4:83a03d50 [<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) r5:852fd700 r4:83a038e0 [<8071db4c>] (blk_mq_freeze_queue) from [<80a00d6c>] (nbd_add_socket+0x70/0x208 drivers/block/nbd.c:1109) r5:852fd700 r4:00000000 [<80a00cfc>] (nbd_add_socket) from [<80a011b0>] (__nbd_ioctl drivers/block/nbd.c:1454 [inline]) [<80a00cfc>] (nbd_add_socket) from [<80a011b0>] (nbd_ioctl+0x2ac/0x38c drivers/block/nbd.c:1511) r9:852fd700 r8:83a39980 r7:830c8880 r6:83a39900 r5:00000004 r4:0000ab00 [<80a00f04>] (nbd_ioctl) from [<807268dc>] (blkdev_ioctl+0x364/0xc58 block/ioctl.c:609) r10:8391ef78 r9:00000003 r8:480a001d r7:00000004 r6:830c8880 r5:0000ab00 r4:80a00f04 [<80726578>] (blkdev_ioctl) from [<804990a8>] (vfs_ioctl fs/ioctl.c:51 [inline]) [<80726578>] (blkdev_ioctl) from [<804990a8>] (do_vfs_ioctl fs/ioctl.c:834 [inline]) [<80726578>] (blkdev_ioctl) from [<804990a8>] (__do_sys_ioctl fs/ioctl.c:872 [inline]) [<80726578>] (blkdev_ioctl) from [<804990a8>] (sys_ioctl+0x110/0xaa0 fs/ioctl.c:860) r10:8391ef78 r9:00000003 r8:8445a0c0 r7:00000004 r6:8445a0c1 r5:00000000 r4:0000ab00 [<80498f98>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0x85495fa8 to 0x85495ff0) 5fa0: 00000000 00000000 00000003 0000ab00 00000004 00000000 5fc0: 00000000 00000000 00000000 00000036 7ef2d31a 76fc46d0 7ef2d4a4 76fc420c 5fe0: 76fc4048 76fc4038 00018e9c 0004ba40 r10:00000036 r9:8536d080 r8:80200244 r7:00000036 r6:00000000 r5:00000000 r4:00000000 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: [<816f56d0>] (dump_backtrace) from [<816f58bc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:237) r7:00000001 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 r4:00000001 [<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) r7:00000001 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) r9:0004cbc0 r8:82204d00 r7:00007f64 r6:824839b0 r5:8220c5d4 r4:8407bc40 [<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 r6:828cf180 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 selinux_socket_getpeersec_dgram+0x50/0xf0 security/selinux/hooks.c:5259 LR is at security_socket_getpeersec_dgram+0x40/0x60 security/security.c:2256 pc : [<806747b0>] lr : [<8066beac>] psr: 600f0013 sp : 8429fdb8 ip : 00000000 fp : 8429fdd4 r10: 00000121 r9 : 84021700 r8 : 83b1ed00 r7 : 00000000 r6 : 830a2c80 r5 : 8429fe48 r4 : 8429fe48 r3 : 830a2c80 r2 : 00000000 r1 : 00000000 r0 : 00000000 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 842f7940 DAC: fffffffd CPU: 0 PID: 2020 Comm: klogd 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 r6:8429fd68 r5:600f0193 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) r5:000f0193 r4:00000000 [<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 r6:00000000 r5:8280cb80 r4:00000007 [<8020fd0c>] (do_handle_IPI) from [<802100e0>] (ipi_handler+0x20/0x28 arch/arm/kernel/smp.c:708) r9:84021700 r8:8429fcd0 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) r10:00000121 r9:84021700 r8:00000000 r7:df80200c r6:84021700 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) r7:8429fd68 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(0x8429fd68 to 0x8429fdb0) fd60: 00000000 00000000 00000000 830a2c80 8429fe48 8429fe48 fd80: 830a2c80 00000000 83b1ed00 84021700 00000121 8429fdd4 00000000 8429fdb8 fda0: 8066beac 806747b0 600f0013 ffffffff r9:84021700 r8:83b1ed00 r7:8429fd9c r6:ffffffff r5:600f0013 r4:806747b0 [<80674760>] (selinux_socket_getpeersec_dgram) from [<8066beac>] (security_socket_getpeersec_dgram+0x40/0x60 security/security.c:2256) r4:81f1e6a8 [<8066be6c>] (security_socket_getpeersec_dgram) from [<8152533c>] (unix_get_peersec_dgram include/net/scm.h:49 [inline]) [<8066be6c>] (security_socket_getpeersec_dgram) from [<8152533c>] (scm_send include/net/scm.h:86 [inline]) [<8066be6c>] (security_socket_getpeersec_dgram) from [<8152533c>] (unix_dgram_sendmsg+0x70/0x8f4 net/unix/af_unix.c:1773) r7:00004000 r6:00000000 r5:830a2c80 r4:8429feb0 [<815252cc>] (unix_dgram_sendmsg) from [<8129dcc8>] (sock_sendmsg_nosec net/socket.c:704 [inline]) [<815252cc>] (unix_dgram_sendmsg) from [<8129dcc8>] (sock_sendmsg+0x3c/0x4c net/socket.c:724) r10:00000121 r9:84021700 r8:80200244 r7:00004000 r6:00000000 r5:830a2c80 r4:8429feb0 [<8129dc8c>] (sock_sendmsg) from [<8129fc14>] (__sys_sendto+0xcc/0x118 net/socket.c:2036) r5:830a2c80 r4:00000000 [<8129fb48>] (__sys_sendto) from [<8129fca4>] (__do_sys_send net/socket.c:2058 [inline]) [<8129fb48>] (__sys_sendto) from [<8129fca4>] (sys_send+0x20/0x28 net/socket.c:2055) r7:00000121 r6:00000001 r5:76fd3080 r4:01566190 [<8129fc84>] (sys_send) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0x8429ffa8 to 0x8429fff0) ffa0: 01566190 76fd3080 00000003 0156e2c0 00000080 00004000 ffc0: 01566190 76fd3080 00000001 00000121 7ed34cc0 00000000 76fd3080 00000000 ffe0: 00000000 7ed34bf8 76f04b88 76f09e78