watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.4.232:6642] Modules linked in: irq event stamp: 12039057 hardirqs last enabled at (12039056): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:357 hardirqs last disabled at (12039057): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (807122): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (807122): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (807122): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (807125): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (807125): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (807125): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 1 UID: 0 PID: 6642 Comm: syz.4.232 Not tainted 6.15.0-rc4-syzkaller-gc5cebb241e27 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:__slab_alloc_node mm/slub.c:4010 [inline] RIP: 0010:slab_alloc_node mm/slub.c:4198 [inline] RIP: 0010:kmem_cache_alloc_node_noprof+0xab/0x3c0 mm/slub.c:4262 Code: 85 c0 0f 85 74 01 00 00 89 6c 24 0c e9 63 02 00 00 48 c7 44 24 18 00 00 00 00 65 48 8b 05 55 31 5e 10 49 8b 0f 4c 8b 64 08 08 <4c> 8b 2c 08 48 8b 5c 08 10 66 90 4d 85 ed 0f 84 82 01 00 00 48 85 RSP: 0018:ffffc90000a08940 EFLAGS: 00000202 RAX: ffff8881261c9000 RBX: 0000000000000000 RCX: ffffffff92778a10 RDX: 0000000000000001 RSI: 00000000000002c0 RDI: ffffffff8e05c720 RBP: 00000000ffffffff R08: 00000000ffffffff R09: 0000000000000000 R10: ffff8880275b9500 R11: ffffffff81ce9456 R12: 00000000000320b9 R13: dffffc0000000000 R14: 0000000000082820 R15: ffff88801e6b6b40 FS: 00007fe1a98d56c0(0000) GS:ffff8881261c9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000000cf3d CR3: 000000005e7e0000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: kmalloc_reserve+0xbd/0x290 net/core/skbuff.c:577 __alloc_skb+0x142/0x2d0 net/core/skbuff.c:668 alloc_skb include/linux/skbuff.h:1340 [inline] ndisc_alloc_skb+0x9f/0x480 net/ipv6/ndisc.c:423 ndisc_send_rs+0x2b5/0x630 net/ipv6/ndisc.c:707 addrconf_rs_timer+0x369/0x670 net/ipv6/addrconf.c:4038 call_timer_fn+0x17b/0x5f0 kernel/time/timer.c:1789 expire_timers kernel/time/timer.c:1840 [inline] __run_timers kernel/time/timer.c:2414 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2426 run_timer_base kernel/time/timer.c:2435 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2445 handle_softirqs+0x283/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:memset_orig+0x75/0xb0 arch/x86/lib/memset_64.S:91 Code: 89 47 30 48 89 47 38 48 8d 7f 40 75 d8 0f 1f 84 00 00 00 00 00 89 d1 83 e1 38 74 14 c1 e9 03 66 0f 1f 44 00 00 ff c9 48 89 07 <48> 8d 7f 08 75 f5 83 e2 07 74 0a ff ca 88 07 48 8d 7f 01 75 f6 4c RSP: 0018:ffffc9001c606b98 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffffc9001c606c28 RBP: ffffc9001c606c98 R08: ffffc9001c606c2f R09: 0000000000000000 R10: ffffc9001c606c20 R11: fffff520038c0d86 R12: 0000000000000001 R13: ffffc9001c606c20 R14: ffff88807cc58800 R15: ffffffff8de0aa68 bpf_prog_run_array include/linux/bpf.h:2220 [inline] trace_call_bpf+0x1db/0x850 kernel/trace/bpf_trace.c:146 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10788 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x335/0x410 include/trace/events/lock.h:24 __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x311/0x360 kernel/locking/lockdep.c:5829 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] class_rcu_constructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479 __unwind_start+0x5b9/0x760 arch/x86/kernel/unwind_orc.c:758 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xe4/0x150 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 save_stack+0xf7/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:308 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1262 [inline] __free_frozen_pages+0xb0e/0xcd0 mm/page_alloc.c:2725 __folio_put+0x21b/0x2c0 mm/swap.c:112 folio_put include/linux/mm.h:1580 [inline] free_large_kmalloc+0x145/0x200 mm/slub.c:4781 bpf_check+0x14767/0x19c60 kernel/bpf/verifier.c:24200 bpf_prog_load+0x1318/0x1930 kernel/bpf/syscall.c:2972 __sys_bpf+0x5f1/0x860 kernel/bpf/syscall.c:5836 __do_sys_bpf kernel/bpf/syscall.c:5943 [inline] __se_sys_bpf kernel/bpf/syscall.c:5941 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5941 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe1a898e969 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe1a98d5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fe1a8bb5fa0 RCX: 00007fe1a898e969 RDX: 0000000000000094 RSI: 0000200000000f80 RDI: 0000000000000005 RBP: 00007fe1a8a10ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fe1a8bb5fa0 R15: 00007ffc2096ce58 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 6647 Comm: syz.4.232 Not tainted 6.15.0-rc4-syzkaller-gc5cebb241e27 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:do_raw_write_seqcount_barrier include/linux/seqlock.h:576 [inline] RIP: 0010:__run_hrtimer kernel/time/hrtimer.c:1739 [inline] RIP: 0010:__hrtimer_run_queues+0x2e0/0xc60 kernel/time/hrtimer.c:1825 Code: 80 3c 28 00 74 08 48 89 df e8 3c cd 73 00 4c 89 23 48 8b 74 24 30 42 0f b6 04 2e 84 c0 48 8b 54 24 20 0f 85 bf 04 00 00 ff 02 <42> 0f b6 04 2e 84 c0 0f 85 d9 04 00 00 41 ff 47 10 4c 89 f8 48 c1 RSP: 0018:ffffc90000007780 EFLAGS: 00000002 RAX: 0000000000000000 RBX: ffff8880b8827788 RCX: ffff888025099e00 RDX: ffff8880b8827750 RSI: 1ffff11017104eea RDI: ffffffff8bc1d4c0 RBP: ffffc900000078d8 R08: ffffffff8f7ed577 R09: 1ffffffff1efdaae R10: dffffc0000000000 R11: fffffbfff1efdaaf R12: ffff888032f0dd48 R13: dffffc0000000000 R14: 0000003e2f96058a R15: ffff8880b8827740 FS: 00007fe1a98b46c0(0000) GS:ffff8881260c9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2fc20000 CR3: 000000005e7e0000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_acquire+0x175/0x360 kernel/locking/lockdep.c:5870 Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 eb 62 d7 10 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e RSP: 0018:ffffc90000007b00 EFLAGS: 00000206 RAX: 3aa6e3f8774d5000 RBX: 0000000000000000 RCX: 3aa6e3f8774d5000 RDX: 0000000000000000 RSI: ffffffff8d93613c RDI: ffffffff8bc1d520 RBP: ffffffff81add6ce R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff81add6ce R12: 0000000000000000 R13: ffffc90000007be0 R14: 0000000000000001 R15: 0000000000000246 call_timer_fn+0xdb/0x5f0 kernel/time/timer.c:1786 expire_timers kernel/time/timer.c:1840 [inline] __run_timers kernel/time/timer.c:2414 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2426 run_timer_base kernel/time/timer.c:2435 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2445 handle_softirqs+0x283/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__ref_is_percpu include/linux/percpu-refcount.h:182 [inline] RIP: 0010:percpu_ref_tryget_many include/linux/percpu-refcount.h:243 [inline] RIP: 0010:percpu_ref_tryget+0x9b/0x180 include/linux/percpu-refcount.h:266 Code: 78 8b e8 48 d1 73 ff 49 bf 00 00 00 00 00 fc ff df 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 28 8a f7 ff 49 8b 06 03 75 6c 65 48 ff 00 40 b5 01 e8 65 c8 2b 09 85 c0 74 3a e8 0c RSP: 0018:ffffc9001c3d79e0 EFLAGS: 00000246 RAX: 0000607ed9baa738 RBX: ffffffff822a6555 RCX: 3aa6e3f8774d5000 RDX: 0000000000000000 RSI: ffffffff8bc1d500 RDI: ffffffff8bc1d4c0 RBP: 1ffffffff1efe08a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff822a6555 R12: ffff888059b86054 R13: dffffc0000000000 R14: ffff888059b86010 R15: dffffc0000000000 css_tryget include/linux/cgroup_refcnt.h:45 [inline] get_mem_cgroup_from_objcg+0x108/0x1d0 include/linux/memcontrol.h:499 __memcg_slab_post_alloc_hook+0x122/0x820 mm/memcontrol.c:3059 memcg_slab_post_alloc_hook mm/slub.c:2197 [inline] slab_post_alloc_hook mm/slub.c:4171 [inline] slab_alloc_node mm/slub.c:4210 [inline] kmem_cache_alloc_lru_noprof+0x2c7/0x3d0 mm/slub.c:4229 __d_alloc+0x31/0x6f0 fs/dcache.c:1681 d_alloc_pseudo+0x1f/0xb0 fs/dcache.c:1812 alloc_path_pseudo fs/file_table.c:360 [inline] alloc_file_pseudo+0xcc/0x210 fs/file_table.c:376 __anon_inode_getfile fs/anon_inodes.c:109 [inline] __anon_inode_getfd fs/anon_inodes.c:234 [inline] anon_inode_getfd+0xca/0x1b0 fs/anon_inodes.c:269 map_create+0xdb6/0x1150 kernel/bpf/syscall.c:1541 __sys_bpf+0x67e/0x860 kernel/bpf/syscall.c:5818 __do_sys_bpf kernel/bpf/syscall.c:5943 [inline] __se_sys_bpf kernel/bpf/syscall.c:5941 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5941 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe1a898e969 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe1a98b4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fe1a8bb6080 RCX: 00007fe1a898e969 RDX: 0000000000000050 RSI: 0000200000000300 RDI: 0000000000000000 RBP: 00007fe1a8a10ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fe1a8bb6080 R15: 00007ffc2096ce58