INFO: task syz-executor.1:29300 blocked for more than 430 seconds. Not tainted 5.15.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack: 0 pid:29300 ppid: 2258 flags:0x00000001 Backtrace: [<81712440>] (__schedule) from [<81712e98>] (schedule+0x54/0xdc kernel/sched/core.c:6326) r10:837a4038 r9:852f9080 r8:85866f00 r7:83a1df00 r6:83a1df00 r5:83a4be98 r4:836c8000 [<81712e44>] (schedule) from [<8071ac2c>] (blk_mq_freeze_queue_wait+0x6c/0xa4 block/blk-mq.c:178) r5:83a4be98 r4:83a4c300 [<8071abc0>] (blk_mq_freeze_queue_wait) from [<8071dba0>] (blk_freeze_queue block/blk-mq.c:205 [inline]) [<8071abc0>] (blk_mq_freeze_queue_wait) from [<8071dba0>] (blk_mq_freeze_queue+0x1c/0x20 block/blk-mq.c:214) r5:852f9080 r4:83a4be90 [<8071db84>] (blk_mq_freeze_queue) from [<80a00dac>] (nbd_add_socket+0x70/0x208 drivers/block/nbd.c:1109) r5:852f9080 r4:00000000 [<80a00d3c>] (nbd_add_socket) from [<80a011f0>] (__nbd_ioctl drivers/block/nbd.c:1454 [inline]) [<80a00d3c>] (nbd_add_socket) from [<80a011f0>] (nbd_ioctl+0x2ac/0x38c drivers/block/nbd.c:1511) r9:852f9080 r8:83a1df80 r7:82c89100 r6:83a1df00 r5:00000005 r4:0000ab00 [<80a00f44>] (nbd_ioctl) from [<80726914>] (blkdev_ioctl+0x364/0xc58 block/ioctl.c:609) r10:837a4038 r9:00000003 r8:480a001d r7:00000005 r6:82c89100 r5:0000ab00 r4:80a00f44 [<807265b0>] (blkdev_ioctl) from [<804990e0>] (vfs_ioctl fs/ioctl.c:51 [inline]) [<807265b0>] (blkdev_ioctl) from [<804990e0>] (do_vfs_ioctl fs/ioctl.c:834 [inline]) [<807265b0>] (blkdev_ioctl) from [<804990e0>] (__do_sys_ioctl fs/ioctl.c:872 [inline]) [<807265b0>] (blkdev_ioctl) from [<804990e0>] (sys_ioctl+0x110/0xaa0 fs/ioctl.c:860) r10:837a4038 r9:00000003 r8:839cf300 r7:00000005 r6:839cf301 r5:00000000 r4:0000ab00 [<80498fd0>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0x853bffa8 to 0x853bfff0) ffa0: 00000000 00000000 00000003 0000ab00 00000005 00000000 ffc0: 00000000 00000000 00000000 00000036 7ea9531a 76f416d0 7ea954a4 76f4120c ffe0: 76f41048 76f41038 00018e9c 0004ba40 r10:00000036 r9:836c8000 r8:80200244 r7:00000036 r6:00000000 r5:00000000 r4:00000000 NMI backtrace for cpu 1 CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.15.0-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: [<816f5710>] (dump_backtrace) from [<816f58fc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:237) r7:00000001 r6:00000000 r5:60000093 r4:81d60180 [<816f58e4>] (show_stack) from [<816fe354>] (__dump_stack lib/dump_stack.c:88 [inline]) [<816f58e4>] (show_stack) from [<816fe354>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<816fe30c>] (dump_stack_lvl) from [<816fe378>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:00000013 r4:00000001 [<816fe360>] (dump_stack) from [<8083cdac>] (nmi_cpu_backtrace+0x114/0x180 lib/nmi_backtrace.c:105) [<8083cc98>] (nmi_cpu_backtrace) from [<8083cf2c>] (nmi_trigger_cpumask_backtrace+0x114/0x1d0 lib/nmi_backtrace.c:62) r7:00000001 r6:8220c494 r5:8220cc70 r4:00000000 [<8083ce18>] (nmi_trigger_cpumask_backtrace) from [<80210c54>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:865) r9:000fb2c1 r8:82204d00 r7:00007f5c r6:824839b0 r5:8220c5d4 r4:834c2340 [<80210c3c>] (arch_trigger_cpumask_backtrace) from [<80329f84>] (trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]) [<80210c3c>] (arch_trigger_cpumask_backtrace) from [<80329f84>] (check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]) [<80210c3c>] (arch_trigger_cpumask_backtrace) from [<80329f84>] (watchdog+0x4a0/0x58c kernel/hung_task.c:295) [<80329ae4>] (watchdog) from [<8026a518>] (kthread+0x164/0x198 kernel/kthread.c:327) r10:8294de4c r9:00000000 r8:00000000 r7:80329ae4 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: 2016 Comm: syslogd Not tainted 5.15.0-syzkaller #0 Hardware name: ARM-Versatile Express PC is at selinux_inode security/selinux/include/objsec.h:164 [inline] PC is at inode_security+0x58/0x74 security/selinux/hooks.c:310 LR is at selinux_file_permission+0x50/0xfc security/selinux/hooks.c:3689 pc : [<8067c2b0>] lr : [<8067cc6c>] psr: 600f0013 sp : 841e1e58 ip : 841e1e70 fp : 841e1e6c r10: 00000001 r9 : 8298ba40 r8 : 835ef300 r7 : 8298ba40 r6 : 00000000 r5 : 83f6c480 r4 : 830a6080 r3 : 843a006c r2 : 00000000 r1 : 00000004 r0 : 830a6080 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 82bebdc0 DAC: fffffffd CPU: 0 PID: 2016 Comm: syslogd Not tainted 5.15.0-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: [<816f5710>] (dump_backtrace) from [<816f58fc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:237) r7:00000017 r6:841e1e08 r5:600f0193 r4:81d60180 [<816f58e4>] (show_stack) from [<816fe354>] (__dump_stack lib/dump_stack.c:88 [inline]) [<816f58e4>] (show_stack) from [<816fe354>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<816fe30c>] (dump_stack_lvl) from [<816fe378>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:000f0193 r4:00000000 [<816fe360>] (dump_stack) from [<80209080>] (show_regs+0x14/0x18 arch/arm/kernel/process.c:199) [<8020906c>] (show_regs) from [<8083cd94>] (nmi_cpu_backtrace+0xfc/0x180 lib/nmi_backtrace.c:103) [<8083cc98>] (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) r9:835ef300 r8:841e1d70 r7:00000017 r6:8220cc8c r5:8280cb80 r4:82885d00 [<802100c0>] (ipi_handler) from [<802b9538>] (handle_percpu_devid_irq+0x9c/0x2d4 kernel/irq/chip.c:933) [<802b949c>] (handle_percpu_devid_irq) from [<802b2ba8>] (generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]) [<802b949c>] (handle_percpu_devid_irq) from [<802b2ba8>] (handle_irq_desc kernel/irq/irqdesc.c:646 [inline]) [<802b949c>] (handle_percpu_devid_irq) from [<802b2ba8>] (generic_handle_domain_irq+0x48/0x8c kernel/irq/irqdesc.c:680) r10:00000001 r9:835ef300 r8:00000000 r7:df80200c r6:835ef300 r5:00000007 r4:82888000 r3:802b949c [<802b2b60>] (generic_handle_domain_irq) from [<8084fac0>] (gic_handle_irq+0x68/0x7c drivers/irqchip/irq-gic.c:372) r7:df80200c r6:820a5fc4 r5:df802000 r4:8220cc8c [<8084fa58>] (gic_handle_irq) from [<817102a4>] (generic_handle_arch_irq+0x60/0x80 kernel/irq/handle.c:243) r7:841e1e08 r6:81f092ac r5:81f092c4 r4:820a5fb8 [<81710244>] (generic_handle_arch_irq) from [<80200abc>] (__irq_svc+0x3c/0x64 arch/arm/kernel/entry-armv.S:202) Exception stack(0x841e1e08 to 0x841e1e50) 1e00: 830a6080 00000004 00000000 843a006c 830a6080 83f6c480 1e20: 00000000 8298ba40 835ef300 8298ba40 00000001 841e1e6c 841e1e70 841e1e58 1e40: 8067cc6c 8067c2b0 600f0013 ffffffff r9:835ef300 r8:835ef300 r7:841e1e3c r6:ffffffff r5:600f0013 r4:8067c2b0 [<8067c258>] (inode_security) from [<8067cc6c>] (selinux_file_permission+0x50/0xfc security/selinux/hooks.c:3689) r5:83f6c480 r4:00000004 [<8067cc1c>] (selinux_file_permission) from [<8066eaec>] (security_file_permission+0x38/0x64 security/security.c:1507) r10:00000003 r9:835ef300 r8:00000000 r7:00f7e1b8 r6:83f6c480 r5:00000004 r4:81f1e0cc r3:8067cc1c [<8066eab4>] (security_file_permission) from [<80480c80>] (rw_verify_area+0x54/0x98 fs/read_write.c:385) r7:00f7e1b8 r6:83f6c480 r5:83f6c480 r4:000000ff [<80480c2c>] (rw_verify_area) from [<8048250c>] (vfs_read+0x70/0x314 fs/read_write.c:472) [<8048249c>] (vfs_read) from [<80482ca8>] (ksys_read+0xb4/0xec fs/read_write.c:619) r10:00000003 r9:835ef300 r8:80200244 r7:000000ff r6:00f7e1b8 r5:83f6c480 r4:83f6c480 [<80482bf4>] (ksys_read) from [<80482cf0>] (__do_sys_read fs/read_write.c:629 [inline]) [<80482bf4>] (ksys_read) from [<80482cf0>] (sys_read+0x10/0x14 fs/read_write.c:627) r7:00000003 r6:76fb1080 r5:00f7e190 r4:fffffc00 [<80482ce0>] (sys_read) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0x841e1fa8 to 0x841e1ff0) 1fa0: fffffc00 00f7e190 00000000 00f7e1b8 000000ff 00000000 1fc0: fffffc00 00f7e190 76fb1080 00000003 00000000 000d6c90 000d6c90 00000000 1fe0: 000d609c 7efa6c88 000579b8 76ed56f8