INFO: task syz-executor.0:2234 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: 2234 ppid: 1 flags:0x00000001 Backtrace: [<816d5518>] (__schedule) from [<816d5f70>] (schedule+0x54/0xdc kernel/sched/core.c:6326) r10:83938d2c r9:5ac3c35a r8:82cd8440 r7:84f0a894 r6:00000001 r5:829ddb08 r4:83ebe780 [<816d5f1c>] (schedule) from [<8071aedc>] (blk_mq_freeze_queue_wait+0x6c/0xa4 block/blk-mq.c:178) r5:829ddb08 r4:829ddf70 [<8071ae70>] (blk_mq_freeze_queue_wait) from [<8071de50>] (blk_freeze_queue block/blk-mq.c:205 [inline]) [<8071ae70>] (blk_mq_freeze_queue_wait) from [<8071de50>] (blk_mq_freeze_queue+0x1c/0x20 block/blk-mq.c:214) r5:83938c00 r4:829ddb00 [<8071de34>] (blk_mq_freeze_queue) from [<809bf9e4>] (__loop_clr_fd+0x6c/0x428 drivers/block/loop.c:1122) r5:83938c00 r4:83938c00 [<809bf978>] (__loop_clr_fd) from [<809bfe44>] (lo_release+0xa4/0xa8 drivers/block/loop.c:1761) r10:8220c44c r9:5ac3c35a r8:82cd8440 r7:84f0a894 r6:00000001 r5:83938d2c r4:83938c00 [<809bfda0>] (lo_release) from [<80706d34>] (blkdev_put_whole block/bdev.c:694 [inline]) [<809bfda0>] (lo_release) from [<80706d34>] (blkdev_put+0xd4/0x27c block/bdev.c:956) r7:84f0a894 r6:84f0a840 r5:00000083 r4:82cd8440 [<80706c60>] (blkdev_put) from [<80484e90>] (kill_block_super+0x3c/0x74 fs/super.c:1400) r8:8220c490 r7:8220c920 r6:00000000 r5:00000083 r4:82cd8440 [<80484e54>] (kill_block_super) from [<80485b04>] (deactivate_locked_super+0x54/0xb4 fs/super.c:335) r5:82317c48 r4:851f5400 [<80485ab0>] (deactivate_locked_super) from [<80485bc4>] (deactivate_super fs/super.c:366 [inline]) [<80485ab0>] (deactivate_locked_super) from [<80485bc4>] (deactivate_super+0x60/0x64 fs/super.c:362) r5:85317900 r4:851f5400 [<80485b64>] (deactivate_super) from [<804a9a1c>] (cleanup_mnt+0x11c/0x180 fs/namespace.c:1137) r5:85317900 r4:00000002 [<804a9900>] (cleanup_mnt) from [<804a9af0>] (__cleanup_mnt+0x14/0x18 fs/namespace.c:1144) r9:5ac3c35a r8:83ebefd4 r7:8243d600 r6:83ebe780 r5:83ebefa4 r4:00000000 [<804a9adc>] (__cleanup_mnt) from [<80266ed8>] (task_work_run+0x8c/0xb8 kernel/task_work.c:164) [<80266e4c>] (task_work_run) from [<8020bff0>] (tracehook_notify_resume include/linux/tracehook.h:189 [inline]) [<80266e4c>] (task_work_run) from [<8020bff0>] (do_work_pending+0x438/0x53c arch/arm/kernel/signal.c:630) r9:5ac3c35a r8:80200244 r7:fffffe30 r6:80200244 r5:84459fb0 r4:83ebe780 [<8020bbb8>] (do_work_pending) from [<80200088>] (slow_work_pending+0xc/0x20) Exception stack(0x84459fb0 to 0x84459ff8) 9fa0: 00000000 0000000a 00000000 00000000 9fc0: 00085150 7e7ff510 00120000 00000034 00085150 01275fc8 00000000 7e7ff4d0 9fe0: 7f0302ff 7e7ff494 00014734 0004ce3c 60000010 7e7ff510 r10:00000034 r9:83ebe780 r8:80200244 r7:00000034 r6:00120000 r5:7e7ff510 r4:00085150 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: [<816b87e8>] (dump_backtrace) from [<816b89d4>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:237) r7:00000001 r6:00000000 r5:600f0093 r4:81d6057c [<816b89bc>] (show_stack) from [<816c142c>] (__dump_stack lib/dump_stack.c:88 [inline]) [<816b89bc>] (show_stack) from [<816c142c>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<816c13e4>] (dump_stack_lvl) from [<816c1450>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:000f0013 r4:00000001 [<816c1438>] (dump_stack) from [<807ff9ac>] (nmi_cpu_backtrace+0x114/0x180 lib/nmi_backtrace.c:111) [<807ff898>] (nmi_cpu_backtrace) from [<807ffb30>] (nmi_trigger_cpumask_backtrace+0x118/0x1d4 lib/nmi_backtrace.c:62) r7:00000001 r6:8220c494 r5:8220cc70 r4:00000000 [<807ffa18>] (nmi_trigger_cpumask_backtrace) from [<80210c54>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:865) r9:000afcc0 r8:82204d00 r7:00007f34 r6:824839b0 r5:8220c5d4 r4:83951140 [<80210c3c>] (arch_trigger_cpumask_backtrace) from [<8032a05c>] (trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]) [<80210c3c>] (arch_trigger_cpumask_backtrace) from [<8032a05c>] (check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]) [<80210c3c>] (arch_trigger_cpumask_backtrace) from [<8032a05c>] (watchdog+0x4a0/0x58c kernel/hung_task.c:295) [<80329bbc>] (watchdog) from [<8026a5cc>] (kthread+0x164/0x198 kernel/kthread.c:327) r10:8294de4c r9:00000000 r8:00000000 r7:80329bbc r6:828cf180 r5:82a89240 r4:828f2e00 [<8026a468>] (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 r5:8026a468 r4:82a89240 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2016 Comm: syslogd Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express PC is at selinux_revalidate_file_permission security/selinux/hooks.c:3671 [inline] PC is at selinux_file_permission+0x6c/0xfc security/selinux/hooks.c:3695 LR is at selinux_file_permission+0x50/0xfc security/selinux/hooks.c:3689 pc : [<8067cf38>] lr : [<8067cf1c>] psr: 800e0013 sp : 84323e70 ip : 84323e70 fp : 84323e9c r10: 00000001 r9 : 82985df0 r8 : 83eb9700 r7 : 82985df0 r6 : 00000000 r5 : 82be6e40 r4 : 00000004 r3 : 00000001 r2 : 00000000 r1 : 00000004 r0 : 840603fc Flags: Nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 841d3180 DAC: fffffffd CPU: 0 PID: 2016 Comm: syslogd Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: [<816b87e8>] (dump_backtrace) from [<816b89d4>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:237) r7:00000017 r6:84323e20 r5:600e0193 r4:81d6057c [<816b89bc>] (show_stack) from [<816c142c>] (__dump_stack lib/dump_stack.c:88 [inline]) [<816b89bc>] (show_stack) from [<816c142c>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<816c13e4>] (dump_stack_lvl) from [<816c1450>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:000e0193 r4:00000000 [<816c1438>] (dump_stack) from [<80209080>] (show_regs+0x14/0x18 arch/arm/kernel/process.c:199) [<8020906c>] (show_regs) from [<807ff994>] (nmi_cpu_backtrace+0xfc/0x180 lib/nmi_backtrace.c:109) [<807ff898>] (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) r9:83eb9700 r8:84323d88 r7:00000017 r6:8220cc8c r5:8280cb80 r4:82885d00 [<802100c0>] (ipi_handler) from [<802b9610>] (handle_percpu_devid_irq+0x9c/0x2d4 kernel/irq/chip.c:933) [<802b9574>] (handle_percpu_devid_irq) from [<802b2c80>] (generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]) [<802b9574>] (handle_percpu_devid_irq) from [<802b2c80>] (handle_irq_desc kernel/irq/irqdesc.c:646 [inline]) [<802b9574>] (handle_percpu_devid_irq) from [<802b2c80>] (generic_handle_domain_irq+0x48/0x8c kernel/irq/irqdesc.c:680) r10:00000001 r9:83eb9700 r8:00000000 r7:df80200c r6:83eb9700 r5:00000007 r4:82888000 r3:802b9574 [<802b2c38>] (generic_handle_domain_irq) from [<808126c4>] (gic_handle_irq+0x68/0x7c drivers/irqchip/irq-gic.c:372) r7:df80200c r6:820a5fc4 r5:df802000 r4:8220cc8c [<8081265c>] (gic_handle_irq) from [<816d337c>] (generic_handle_arch_irq+0x60/0x80 kernel/irq/handle.c:243) r7:84323e20 r6:81f09748 r5:81f09760 r4:820a5fb8 [<816d331c>] (generic_handle_arch_irq) from [<80200abc>] (__irq_svc+0x3c/0x64 arch/arm/kernel/entry-armv.S:202) Exception stack(0x84323e20 to 0x84323e68) 3e20: 840603fc 00000004 00000000 00000001 00000004 82be6e40 00000000 82985df0 3e40: 83eb9700 82985df0 00000001 84323e9c 84323e70 84323e70 8067cf1c 8067cf38 3e60: 800e0013 ffffffff r9:83eb9700 r8:83eb9700 r7:84323e54 r6:ffffffff r5:800e0013 r4:8067cf38 [<8067cecc>] (selinux_file_permission) from [<8066ed9c>] (security_file_permission+0x38/0x64 security/security.c:1507) r10:00000003 r9:83eb9700 r8:00000000 r7:01f911b8 r6:82be6e40 r5:00000004 r4:81f1e0cc r3:8067cecc [<8066ed64>] (security_file_permission) from [<80480f28>] (rw_verify_area+0x54/0x98 fs/read_write.c:385) r7:01f911b8 r6:82be6e40 r5:82be6e40 r4:000000ff [<80480ed4>] (rw_verify_area) from [<804827b4>] (vfs_read+0x70/0x314 fs/read_write.c:472) [<80482744>] (vfs_read) from [<80482f50>] (ksys_read+0xb4/0xec fs/read_write.c:619) r10:00000003 r9:83eb9700 r8:80200244 r7:000000ff r6:01f911b8 r5:82be6e40 r4:82be6e40 [<80482e9c>] (ksys_read) from [<80482f98>] (__do_sys_read fs/read_write.c:629 [inline]) [<80482e9c>] (ksys_read) from [<80482f98>] (sys_read+0x10/0x14 fs/read_write.c:627) r7:00000003 r6:76fdb080 r5:01f91190 r4:fffffc00 [<80482f88>] (sys_read) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0x84323fa8 to 0x84323ff0) 3fa0: fffffc00 01f91190 00000000 01f911b8 000000ff 00000000 3fc0: fffffc00 01f91190 76fdb080 00000003 00000000 000d6c90 000d6c90 00000000 3fe0: 000d609c 7eff1c88 000579b8 76eff6f8