INFO: task syz.1.724:7063 blocked for more than 430 seconds. Not tainted 6.11.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.724 state:D stack:0 pid:7063 tgid:7060 ppid:4871 flags:0x00400001 Call trace: [<8197ed48>] (__schedule) from [<8197f8e0>] (__schedule_loop kernel/sched/core.c:6606 [inline]) [<8197ed48>] (__schedule) from [<8197f8e0>] (schedule+0x2c/0xfc kernel/sched/core.c:6621) r10:dfa15e64 r9:dfa15d90 r8:00000000 r7:845ddd00 r6:845dddf4 r5:845ddd00 r4:82ff8000 [<8197f8b4>] (schedule) from [<81457c8c>] (__lock_sock+0x68/0xac net/core/sock.c:2980) r5:845ddd00 r4:845dddec [<81457c24>] (__lock_sock) from [<81457db4>] (lock_sock_nested net/core/sock.c:3548 [inline]) [<81457c24>] (__lock_sock) from [<81457db4>] (lock_sock include/net/sock.h:1607 [inline]) [<81457c24>] (__lock_sock) from [<81457db4>] (sockopt_lock_sock net/core/sock.c:1061 [inline]) [<81457c24>] (__lock_sock) from [<81457db4>] (sockopt_lock_sock+0x54/0x58 net/core/sock.c:1052) r6:00000000 r5:845dddec r4:845ddd00 [<81457d60>] (sockopt_lock_sock) from [<8162bfd4>] (do_ip_getsockopt+0x204/0xbb0 net/ipv4/ip_sockglue.c:1703) r5:00000000 r4:00000034 [<8162bdd4>] (do_ip_getsockopt) from [<8162c9e4>] (ip_getsockopt+0x64/0x134 net/ipv4/ip_sockglue.c:1765) r10:00000127 r9:20000180 r8:00000000 r7:20000180 r6:00000000 r5:845ddd00 r4:00000034 [<8162c980>] (ip_getsockopt) from [<8163ce10>] (tcp_getsockopt+0x34/0x6c net/ipv4/tcp.c:4409) r9:20000180 r8:00000000 r7:83212780 r6:00000034 r5:00000000 r4:8162c980 [<8163cddc>] (tcp_getsockopt) from [<81453dd4>] (sock_common_getsockopt+0x28/0x30 net/core/sock.c:3708) r4:8163cddc [<81453dac>] (sock_common_getsockopt) from [<81450bbc>] (do_sock_getsockopt+0x10c/0x298 net/socket.c:2386) r4:81453dac [<81450ab0>] (do_sock_getsockopt) from [<81452b4c>] (__sys_getsockopt net/socket.c:2415 [inline]) [<81450ab0>] (do_sock_getsockopt) from [<81452b4c>] (__do_sys_getsockopt net/socket.c:2425 [inline]) [<81450ab0>] (do_sock_getsockopt) from [<81452b4c>] (sys_getsockopt+0x90/0xd4 net/socket.c:2422) r9:82ff8000 r8:83212780 r7:00000000 r6:00000034 r5:00000000 r4:00000000 [<81452abc>] (sys_getsockopt) from [<8020028c>] (__sys_trace_return+0x0/0x10) Exception stack(0xdfa15fa8 to 0xdfa15ff0) 5fa0: 20000180 00000000 00000003 00000000 00000034 00000000 5fc0: 20000180 00000000 00286388 00000127 00000000 00006364 003d0f00 76b030bc 5fe0: 76b02ec0 76b02eb0 000189d0 00132da0 r8:8020029c r7:00000127 r6:00286388 r5:00000000 r4:20000180 NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 32 Comm: khungtaskd Not tainted 6.11.0-rc7-syzkaller #0 Hardware name: ARM-Versatile Express Call trace: [<8195d178>] (dump_backtrace) from [<8195d274>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257) r7:00000000 r6:00000113 r5:60000193 r4:8200ca20 [<8195d25c>] (show_stack) from [<8197afb0>] (__dump_stack lib/dump_stack.c:93 [inline]) [<8195d25c>] (show_stack) from [<8197afb0>] (dump_stack_lvl+0x70/0x7c lib/dump_stack.c:119) [<8197af40>] (dump_stack_lvl) from [<8197afd4>] (dump_stack+0x18/0x1c lib/dump_stack.c:128) r5:00000001 r4:00000001 [<8197afbc>] (dump_stack) from [<8194a468>] (nmi_cpu_backtrace+0x160/0x17c lib/nmi_backtrace.c:113) [<8194a308>] (nmi_cpu_backtrace) from [<8194a5b4>] (nmi_trigger_cpumask_backtrace+0x130/0x1d8 lib/nmi_backtrace.c:62) r7:00000001 r6:8260c5d0 r5:8261a88c r4:ffffffff [<8194a484>] (nmi_trigger_cpumask_backtrace) from [<802103c8>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:851) r9:0000fac2 r8:828b3130 r7:8260c734 r6:00007f55 r5:8261ae48 r4:84a6ce1c [<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 r8:82e9e340 r7:00000000 r6:80350998 r5:82ee8c00 r4:82f44e00 [<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 r4:82f44e00 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 100 PID: 2973 Comm: dhcpcd Not tainted 6.11.0-rc7-syzkaller #0 Hardware name: ARM-Versatile Express PC is at bpf_trace_run2+0xbc/0x184 kernel/trace/bpf_trace.c:2447 LR is at rcu_read_unlock include/linux/rcupdate.h:871 [inline] LR is at __bpf_trace_run kernel/trace/bpf_trace.c:2407 [inline] LR is at bpf_trace_run2+0x98/0x184 kernel/trace/bpf_trace.c:2447 pc : [<80380b44>] lr : [<80380b20>] psr: 60000013 sp : eb971f18 ip : eb971f18 fp : eb971f64 r10: 00c00000 r9 : 84215400 r8 : 8020029c r7 : 00000000 r6 : 000000ad r5 : 84215400 r4 : dfa17000 r3 : a3e49040 r2 : 00000000 r1 : 5b917000 r0 : 60000013 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 844b9140 DAC: fffffffd Call trace: [<80380a88>] (bpf_trace_run2) from [<8020943c>] (__bpf_trace_sys_enter+0x28/0x30 include/trace/events/syscalls.h:18) r8:8020029c r7:850a1a08 r6:000000ad r5:eb971fb0 r4:84215400 [<80209414>] (__bpf_trace_sys_enter) from [<8020a62c>] (__traceiter_sys_enter include/trace/events/syscalls.h:18 [inline]) [<80209414>] (__bpf_trace_sys_enter) from [<8020a62c>] (trace_sys_enter include/trace/events/syscalls.h:18 [inline]) [<80209414>] (__bpf_trace_sys_enter) from [<8020a62c>] (syscall_trace_enter+0x100/0x1d0 arch/arm/kernel/ptrace.c:869) [<8020a52c>] (syscall_trace_enter) from [<80200248>] (__sys_trace+0x8/0x3c) Exception stack(0xeb971fa8 to 0xeb971ff0) 1fa0: 00000008 76f66260 00000011 00000001 00000000 004a358c 1fc0: 00000008 76f66260 7eb43af0 000000ad 008f2180 7eb43af0 004a0d24 00000000 1fe0: 004a0e58 7eb434f8 76e10cb0 76e10cb8 r7:000000ad r6:7eb43af0 r5:76f66260 r4:00000008