INFO: task syz-executor.0:12405 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:12405 ppid: 2235 flags:0x00000001 Backtrace: [<816d5388>] (__schedule) from [<816d5de0>] (schedule+0x54/0xdc kernel/sched/core.c:6326) r10:83884ba8 r9:8393aa00 r8:8497c000 r7:839d0000 r6:839d0000 r5:83622228 r4:82bf5c00 [<816d5d8c>] (schedule) from [<8071ae2c>] (blk_mq_freeze_queue_wait+0x6c/0xa4 block/blk-mq.c:178) r5:83622228 r4:83622690 [<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) r5:8393aa00 r4:83622220 [<8071dd84>] (blk_mq_freeze_queue) from [<809c390c>] (nbd_add_socket+0x70/0x208 drivers/block/nbd.c:1109) r5:8393aa00 r4:00000000 [<809c389c>] (nbd_add_socket) from [<809c3d50>] (__nbd_ioctl drivers/block/nbd.c:1454 [inline]) [<809c389c>] (nbd_add_socket) from [<809c3d50>] (nbd_ioctl+0x2ac/0x38c drivers/block/nbd.c:1511) r9:8393aa00 r8:839d0080 r7:83107740 r6:839d0000 r5:00000004 r4:0000ab00 [<809c3aa4>] (nbd_ioctl) from [<80726b14>] (blkdev_ioctl+0x364/0xc58 block/ioctl.c:609) r10:83884ba8 r9:00000003 r8:480a001d r7:00000004 r6:83107740 r5:0000ab00 r4:809c3aa4 [<807267b0>] (blkdev_ioctl) from [<804992d8>] (vfs_ioctl fs/ioctl.c:51 [inline]) [<807267b0>] (blkdev_ioctl) from [<804992d8>] (do_vfs_ioctl fs/ioctl.c:834 [inline]) [<807267b0>] (blkdev_ioctl) from [<804992d8>] (__do_sys_ioctl fs/ioctl.c:872 [inline]) [<807267b0>] (blkdev_ioctl) from [<804992d8>] (sys_ioctl+0x110/0xaa0 fs/ioctl.c:860) r10:83884ba8 r9:00000003 r8:851d86c0 r7:00000004 r6:851d86c1 r5:00000000 r4:0000ab00 [<804991c8>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0x85347fa8 to 0x85347ff0) 7fa0: 00000000 00000000 00000003 0000ab00 00000004 00000000 7fc0: 00000000 00000000 00000000 00000036 7eaa931a 76f9d6d0 7eaa94a4 76f9d20c 7fe0: 76f9d048 76f9d038 00018e9c 0004ba40 r10:00000036 r9:82bf5c00 r8:80200244 r7:00000036 r6:00000000 r5:00000000 r4:00000000 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 r5:60000093 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) r5:00000013 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) r9:0002a580 r8:82204d00 r7:00007f66 r6:824839b0 r5:8220c5d4 r4:82a90b40 [<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 r6:82aebc00 r5:82aebbc0 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 r4:82aebbc0 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 bpf_lsm_socket_recvmsg+0x0/0x14 include/linux/lsm_hook_defs.h:297 LR is at security_socket_recvmsg+0x48/0x64 security/security.c:2213 pc : [<803b3584>] lr : [<80670788>] psr: a00f0013 sp : 840cbe48 ip : 803b3584 fp : 840cbe6c r10: 00000000 r9 : 83ebf300 r8 : 840cbe70 r7 : 82c54c80 r6 : 000000ff r5 : 00000000 r4 : 81f1fc94 r3 : 00000000 r2 : 000000ff r1 : 840cbe70 r0 : 82c54c80 Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none Control: 30c5387d Table: 84369b40 DAC: 00000000 CPU: 1 PID: 2017 Comm: syslogd 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 r6:840cbdf8 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) r9:83ebf300 r8:840cbd60 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) r10:00000000 r9:83ebf300 r8:00000000 r7:df80200c r6:83ebf300 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) r7:840cbdf8 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(0x840cbdf8 to 0x840cbe40) bde0: 82c54c80 840cbe70 be00: 000000ff 00000000 81f1fc94 00000000 000000ff 82c54c80 840cbe70 83ebf300 be20: 00000000 840cbe6c 803b3584 840cbe48 80670788 803b3584 a00f0013 ffffffff r9:83ebf300 r8:840cbe70 r7:840cbe2c r6:ffffffff r5:a00f0013 r4:803b3584 [<80670740>] (security_socket_recvmsg) from [<812611bc>] (sock_recvmsg net/socket.c:960 [inline]) [<80670740>] (security_socket_recvmsg) from [<812611bc>] (sock_read_iter+0xd8/0x12c net/socket.c:1035) r9:83ebf300 r8:00000000 r7:00000000 r6:82c54c80 r5:840cbf08 r4:840cbef0 [<812610e4>] (sock_read_iter) from [<8048297c>] (call_read_iter include/linux/fs.h:2156 [inline]) [<812610e4>] (sock_read_iter) from [<8048297c>] (new_sync_read fs/read_write.c:400 [inline]) [<812610e4>] (sock_read_iter) from [<8048297c>] (vfs_read+0x2e8/0x314 fs/read_write.c:481) r7:00004004 r6:8363a600 r5:00000000 r4:000000ff [<80482694>] (vfs_read) from [<80482ea0>] (ksys_read+0xb4/0xec fs/read_write.c:619) r10:00000003 r9:83ebf300 r8:80200244 r7:000000ff r6:00e861b8 r5:8363a600 r4:8363a600 [<80482dec>] (ksys_read) from [<80482ee8>] (__do_sys_read fs/read_write.c:629 [inline]) [<80482dec>] (ksys_read) from [<80482ee8>] (sys_read+0x10/0x14 fs/read_write.c:627) r7:00000003 r6:76f37080 r5:00e86190 r4:fffffc00 [<80482ed8>] (sys_read) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0x840cbfa8 to 0x840cbff0) bfa0: fffffc00 00e86190 00000000 00e861b8 000000ff 00000000 bfc0: fffffc00 00e86190 76f37080 00000003 00000000 000d6c90 000d6c90 00000000 bfe0: 000d609c 7ea7dc88 000579b8 76e5b6f8