watchdog: BUG: soft lockup - CPU#0 stuck for 24s! [syz.0.767:6393] Modules linked in: irq event stamp: 5636 hardirqs last enabled at (5635): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline] hardirqs last enabled at (5635): [] exit_to_kernel_mode+0xcc/0xfc arch/arm64/kernel/entry-common.c:94 hardirqs last disabled at (5636): [] __el1_irq arch/arm64/kernel/entry-common.c:468 [inline] hardirqs last disabled at (5636): [] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:486 softirqs last enabled at (580): [] softirq_handle_end kernel/softirq.c:421 [inline] softirqs last enabled at (580): [] handle_softirqs+0xaf8/0xc6c kernel/softirq.c:606 softirqs last disabled at (523): [] __do_softirq+0x14/0x20 kernel/softirq.c:612 CPU: 0 PID: 6393 Comm: syz.0.767 Not tainted 6.1.140-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : csd_lock_wait kernel/smp.c:424 [inline] pc : smp_call_function_many_cond+0x1384/0x1460 kernel/smp.c:998 lr : csd_lock_wait kernel/smp.c:424 [inline] lr : smp_call_function_many_cond+0x139c/0x1460 kernel/smp.c:998 sp : ffff8000212a7000 x29: ffff8000212a7060 x28: 0000000000000001 x27: ffff80001506d000 x26: 0000000000000011 x25: ffff800015071140 x24: ffff00019f72c140 x23: 1fffe00033ee5828 x22: dfff800000000000 x21: ffff00019f7519c8 x20: 0000000000000001 x19: ffff800015269da0 x18: ffff8000205f4059 x17: ffff8000205f4054 x16: ffff8000082d1c1c x15: 0000000000000002 x14: 0000000000000001 x13: 0000000000ff0100 x12: 0000000000080000 x11: 000000000007ffff x10: ffff800021869000 x9 : 0000000000000000 x8 : 0000000000000011 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000006 x4 : 0000000000000000 x3 : ffff8000083ffc04 x2 : 0000000000000000 x1 : 0000000000000004 x0 : 0000000000000001 Call trace: __cmpwait_case_32 arch/arm64/include/asm/cmpxchg.h:252 [inline] __cmpwait arch/arm64/include/asm/cmpxchg.h:278 [inline] csd_lock_wait kernel/smp.c:424 [inline] smp_call_function_many_cond+0x1384/0x1460 kernel/smp.c:998 smp_call_function_many kernel/smp.c:1022 [inline] smp_call_function kernel/smp.c:1044 [inline] kick_all_cpus_sync+0x40/0xa0 kernel/smp.c:1190 flush_icache_range arch/arm64/include/asm/cacheflush.h:103 [inline] bpf_flush_icache arch/arm64/net/bpf_jit_comp.c:1499 [inline] bpf_int_jit_compile+0x940/0x104c arch/arm64/net/bpf_jit_comp.c:1629 bpf_prog_select_runtime+0x3cc/0x69c kernel/bpf/core.c:2234 bpf_migrate_filter net/core/filter.c:1309 [inline] bpf_prepare_filter+0xd58/0xeb4 net/core/filter.c:1357 bpf_prog_create+0x100/0x1c0 net/core/filter.c:1397 __bpf_mt_check_bytecode net/netfilter/xt_bpf.c:35 [inline] bpf_mt_check+0xd4/0x198 net/netfilter/xt_bpf.c:68 xt_check_match+0x314/0x8a0 net/netfilter/x_tables.c:523 check_match net/ipv6/netfilter/ip6_tables.c:490 [inline] find_check_match net/ipv6/netfilter/ip6_tables.c:507 [inline] find_check_entry net/ipv6/netfilter/ip6_tables.c:558 [inline] translate_table+0xfa4/0x1850 net/ipv6/netfilter/ip6_tables.c:735 do_replace net/ipv6/netfilter/ip6_tables.c:1156 [inline] do_ip6t_set_ctl+0x818/0xb20 net/ipv6/netfilter/ip6_tables.c:1646 nf_setsockopt+0x270/0x290 net/netfilter/nf_sockopt.c:101 ipv6_setsockopt+0x168/0x1a0 net/ipv6/ipv6_sockglue.c:1029 udpv6_setsockopt+0xa8/0xc0 net/ipv6/udp.c:1713 sock_common_setsockopt+0xb0/0xcc net/core/sock.c:3682 __sys_setsockopt+0x2f8/0x504 net/socket.c:2288 __do_sys_setsockopt net/socket.c:2299 [inline] __se_sys_setsockopt net/socket.c:2296 [inline] __arm64_sys_setsockopt+0xb8/0xd4 net/socket.c:2296 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585