INFO: task syz.1.129:4300 blocked for more than 430 seconds. Not tainted 6.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.129 state:D stack:0 pid:4300 tgid:4295 ppid:3113 flags:0x00400001 Call trace: [<8197e728>] (__schedule) from [<8197f2c0>] (__schedule_loop kernel/sched/core.c:6606 [inline]) [<8197e728>] (__schedule) from [<8197f2c0>] (schedule+0x2c/0xfc kernel/sched/core.c:6621) r10:dfabde5c r9:dfabdd88 r8:00000000 r7:8495d540 r6:8495d634 r5:8495d540 r4:83e43000 [<8197f294>] (schedule) from [<81457794>] (__lock_sock+0x68/0xac net/core/sock.c:2980) r5:8495d540 r4:8495d62c [<8145772c>] (__lock_sock) from [<814578bc>] (lock_sock_nested net/core/sock.c:3548 [inline]) [<8145772c>] (__lock_sock) from [<814578bc>] (lock_sock include/net/sock.h:1607 [inline]) [<8145772c>] (__lock_sock) from [<814578bc>] (sockopt_lock_sock net/core/sock.c:1061 [inline]) [<8145772c>] (__lock_sock) from [<814578bc>] (sockopt_lock_sock+0x54/0x58 net/core/sock.c:1052) r6:00000000 r5:8495d62c r4:8495d540 [<81457868>] (sockopt_lock_sock) from [<8162ba3c>] (do_ip_getsockopt+0x204/0xbb0 net/ipv4/ip_sockglue.c:1703) r5:00000000 r4:00000010 [<8162b83c>] (do_ip_getsockopt) from [<8162c44c>] (ip_getsockopt+0x64/0x134 net/ipv4/ip_sockglue.c:1765) r10:814538b4 r9:20000180 r8:00000000 r7:20000180 r6:00000000 r5:8495d540 r4:00000010 [<8162c3e8>] (ip_getsockopt) from [<8163c878>] (tcp_getsockopt+0x34/0x6c net/ipv4/tcp.c:4409) r9:20000180 r8:832a8280 r7:00000010 r6:00000000 r5:00000000 r4:8162c3e8 [<8163c844>] (tcp_getsockopt) from [<814538dc>] (sock_common_getsockopt+0x28/0x30 net/core/sock.c:3708) r4:8163c844 [<814538b4>] (sock_common_getsockopt) from [<814506d4>] (do_sock_getsockopt+0x124/0x2a0 net/socket.c:2386) r4:00000000 [<814505b0>] (do_sock_getsockopt) from [<81452654>] (__sys_getsockopt net/socket.c:2415 [inline]) [<814505b0>] (do_sock_getsockopt) from [<81452654>] (__do_sys_getsockopt net/socket.c:2425 [inline]) [<814505b0>] (do_sock_getsockopt) from [<81452654>] (sys_getsockopt+0x90/0xd4 net/socket.c:2422) r10:00000127 r9:83e43000 r8:832a8280 r7:00000000 r6:00000010 r5:00000000 r4:00000000 [<814525c4>] (sys_getsockopt) from [<8020028c>] (__sys_trace_return+0x0/0x10) Exception stack(0xdfabdfa8 to 0xdfabdff0) dfa0: 20000180 00000000 00000003 00000000 00000010 00000000 dfc0: 20000180 00000000 00276388 00000127 00000000 00006364 003d0f00 76b970bc dfe0: 76b96ec0 76b96eb0 000189f0 00132dc0 r8:8020029c r7:00000127 r6:00276388 r5:00000000 r4:20000180 NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 32 Comm: khungtaskd Not tainted 6.11.0-rc5-syzkaller #0 Hardware name: ARM-Versatile Express Call trace: [<8195cb40>] (dump_backtrace) from [<8195cc3c>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257) r7:00000000 r6:00000013 r5:60000093 r4:8200c924 [<8195cc24>] (show_stack) from [<8197a97c>] (__dump_stack lib/dump_stack.c:93 [inline]) [<8195cc24>] (show_stack) from [<8197a97c>] (dump_stack_lvl+0x70/0x7c lib/dump_stack.c:119) [<8197a90c>] (dump_stack_lvl) from [<8197a9a0>] (dump_stack+0x18/0x1c lib/dump_stack.c:128) r5:00000000 r4:00000001 [<8197a988>] (dump_stack) from [<81949e30>] (nmi_cpu_backtrace+0x160/0x17c lib/nmi_backtrace.c:113) [<81949cd0>] (nmi_cpu_backtrace) from [<81949f7c>] (nmi_trigger_cpumask_backtrace+0x130/0x1d8 lib/nmi_backtrace.c:62) r7:00000000 r6:8260c5d0 r5:8261a88c r4:ffffffff [<81949e4c>] (nmi_trigger_cpumask_backtrace) from [<802103c8>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:851) r9:00008ccc r8:828b2130 r7:8260c734 r6:00007f55 r5:8261ae48 r4:84ff3f1c [<802103b0>] (arch_trigger_cpumask_backtrace) from [<80350e30>] (trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]) [<802103b0>] (arch_trigger_cpumask_backtrace) from [<80350e30>] (check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]) [<802103b0>] (arch_trigger_cpumask_backtrace) from [<80350e30>] (watchdog+0x498/0x5b8 kernel/hung_task.c:379) [<80350998>] (watchdog) from [<8026fb04>] (kthread+0x104/0x134 kernel/kthread.c:389) r10:00000000 r9:df819e58 r8:82ccfb40 r7:00000000 r6:80350998 r5:82e49800 r4:82fa5640 [<8026fa00>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdf8e1fb0 to 0xdf8e1ff8) 1fa0: 00000000 00000000 00000000 00000000 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8026fa00 r4:82fa5640 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 4305 Comm: dhcpcd-run-hook Not tainted 6.11.0-rc5-syzkaller #0 Hardware name: ARM-Versatile Express PC is at preempt_count_sub+0x0/0xfc kernel/sched/core.c:5675 LR is at __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] LR is at _raw_spin_unlock_irq+0x30/0x54 kernel/locking/spinlock.c:202 pc : [<8027b560>] lr : [<81987a8c>] psr: 60000013 sp : dfb6ded0 ip : dfb6dee0 fp : dfb6dedc r10: 00000077 r9 : 83693c00 r8 : 00000000 r7 : b5403587 r6 : 7e980370 r5 : 83693c00 r4 : dfb6df64 r3 : 00006653 r2 : 00000000 r1 : 00000000 r0 : 00000001 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none Control: 30c5387d Table: 84983080 DAC: 00000000 Call trace: [<81987a5c>] (_raw_spin_unlock_irq) from [<80256ca0>] (spin_unlock_irq include/linux/spinlock.h:401 [inline]) [<81987a5c>] (_raw_spin_unlock_irq) from [<80256ca0>] (__set_current_blocked+0x40/0x58 kernel/signal.c:3107) [<80256c60>] (__set_current_blocked) from [<80256cd8>] (set_current_blocked+0x20/0x24 kernel/signal.c:3091) r5:00000000 r4:dfb6dfb0 [<80256cb8>] (set_current_blocked) from [<8020b6d8>] (restore_sigframe+0x208/0x210 arch/arm/kernel/signal.c:149) [<8020b4d0>] (restore_sigframe) from [<8020b8e4>] (sys_sigreturn+0x40/0x60 arch/arm/kernel/signal.c:207) r7:00000077 r6:76f6794c r5:7e980c90 r4:dfb6dfb0 [<8020b8a4>] (sys_sigreturn) from [<8020028c>] (__sys_trace_return+0x0/0x10) Exception stack(0xdfb6dfa8 to 0xdfb6dff0) dfa0: 00000000 7e980c90 00000011 00000004 00000000 012281a8 dfc0: 00000000 7e980c90 76f6794c 00000077 00000000 004a05d4 76fa6d00 76fa7010 dfe0: 76f67e6c 7e980370 76d60ca0 76d60ca8 r5:7e980c90 r4:00000000