RBP: 00007ffde3c11b80 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffde3c12c10 R13: 00007f5a90410854 R14: 0000000000103dcf R15: 00007ffde3c12c50 watchdog: BUG: soft lockup - CPU#0 stuck for 246s! [syz-executor:18989] Modules linked in: irq event stamp: 39671283 hardirqs last enabled at (39671282): [] ___slab_alloc+0x842/0x1940 mm/slub.c:3782 hardirqs last disabled at (39671283): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (39670930): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (39670930): [] handle_softirqs+0x5be/0x8e0 kernel/softirq.c:607 softirqs last disabled at (39670933): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (39670933): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (39670933): [] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 18989 Comm: syz-executor Not tainted 6.15.0-rc2-syzkaller-00488-g6fea5fabd332 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:__kasan_check_byte+0x15/0x50 mm/kasan/common.c:556 Code: 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 41 54 49 89 f4 55 48 89 fd 53 e8 0d 1f 00 00 89 c3 <84> c0 74 0b 89 d8 5b 5d 41 5c e9 b7 a0 f0 fe 4c 89 e1 48 89 ef 31 RSP: 0018:ffffc90000006f20 EFLAGS: 00000297 RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000002 RDX: 0000000000000000 RSI: ffffffff8169d9f1 RDI: fffffbfff1c77eb8 RBP: ffffffff8e3bf5c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000007cd9 R12: ffffffff8169d9f1 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 000055558a8cd500(0000) GS:ffff8881249b8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0150367000 CR3: 000000006227a000 CR4: 0000000000350ef0 Call Trace: kasan_check_byte include/linux/kasan.h:399 [inline] lock_acquire kernel/locking/lockdep.c:5840 [inline] lock_acquire+0xfc/0x350 kernel/locking/lockdep.c:5823 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+0xd1/0x20a0 arch/x86/kernel/unwind_orc.c:479 arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4161 [inline] slab_alloc_node mm/slub.c:4210 [inline] kmem_cache_alloc_node_noprof+0x1d5/0x3b0 mm/slub.c:4262 kmalloc_reserve+0x18b/0x2c0 net/core/skbuff.c:577 __alloc_skb+0x166/0x380 net/core/skbuff.c:668 alloc_skb include/linux/skbuff.h:1340 [inline] synproxy_send_client_synack+0x1af/0x8f0 net/netfilter/nf_synproxy_core.c:460 nft_synproxy_eval_v4 net/netfilter/nft_synproxy.c:59 [inline] nft_synproxy_do_eval+0xa63/0xd80 net/netfilter/nft_synproxy.c:141 expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline] nft_do_chain+0x2e9/0x1920 net/netfilter/nf_tables_core.c:285 nft_do_chain_inet+0x18a/0x340 net/netfilter/nft_chain_filter.c:161 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xbe/0x200 net/netfilter/core.c:626 nf_hook.constprop.0+0x422/0x750 include/linux/netfilter.h:269 NF_HOOK include/linux/netfilter.h:312 [inline] ip_local_deliver+0x169/0x1f0 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:469 [inline] ip_rcv_finish net/ipv4/ip_input.c:447 [inline] NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] ip_rcv+0x2c3/0x5d0 net/ipv4/ip_input.c:567 __netif_receive_skb_one_core+0x197/0x1e0 net/core/dev.c:5887 __netif_receive_skb+0x1d/0x160 net/core/dev.c:6000 process_backlog+0x442/0x15e0 net/core/dev.c:6352 __napi_poll.constprop.0+0xba/0x550 net/core/dev.c:7324 napi_poll net/core/dev.c:7388 [inline] net_rx_action+0xa97/0x1010 net/core/dev.c:7510 handle_softirqs+0x219/0x8e0 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0x109/0x170 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+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210 Code: 86 67 54 00 48 89 df 5b e9 bd c2 59 00 be 03 00 00 00 5b e9 72 3e 12 03 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 34 24 65 48 8b 15 c8 40 eb 11 65 8b 05 d9 40 eb RSP: 0018:ffffc900195e7bb0 EFLAGS: 00000202 RAX: 0000000000000000 RBX: ffff8880b853f880 RCX: ffffffff81af27a9 RDX: ffff8880314c5a00 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffffed10170a7f11 R13: 0000000000000001 R14: dffffc0000000000 R15: ffff8880b843b180 rep_nop arch/x86/include/asm/vdso/processor.h:13 [inline] cpu_relax arch/x86/include/asm/vdso/processor.h:18 [inline] csd_lock_wait kernel/smp.c:340 [inline] smp_call_function_many_cond+0x4a3/0x1290 kernel/smp.c:885 on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1052 on_each_cpu include/linux/smp.h:71 [inline] kasan_quarantine_remove_cache+0x53/0x180 mm/kasan/quarantine.c:356 kmem_cache_destroy mm/slab_common.c:521 [inline] kmem_cache_destroy+0x5b/0x170 mm/slab_common.c:484 bio_put_slab block/bio.c:155 [inline] bioset_exit+0x2f4/0x5a0 block/bio.c:1664 __bch2_fs_free fs/bcachefs/super.c:565 [inline] bch2_fs_release+0xd3/0x9d0 fs/bcachefs/super.c:628 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1e7/0x5a0 lib/kobject.c:737 deactivate_locked_super+0xc1/0x1a0 fs/super.c:473 deactivate_super fs/super.c:506 [inline] deactivate_super+0xde/0x100 fs/super.c:502 cleanup_mnt+0x225/0x450 fs/namespace.c:1435 task_work_run+0x150/0x240 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x260 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5a9038f497 Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffde3c11ac8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 00007f5a90410854 RCX: 00007f5a9038f497 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffde3c11b80 RBP: 00007ffde3c11b80 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffde3c12c10 R13: 00007f5a90410854 R14: 0000000000103dcf R15: 00007ffde3c12c50 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 24047 Comm: syz.0.7029 Not tainted 6.15.0-rc2-syzkaller-00488-g6fea5fabd332 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:debug_lockdep_rcu_enabled+0x26/0x40 kernel/rcu/update.c:320 Code: 90 90 90 90 f3 0f 1e fa 8b 05 66 13 16 05 85 c0 74 20 8b 05 f0 41 16 05 85 c0 74 16 65 48 8b 05 68 29 36 08 8b 80 ec 0a 00 00 <85> c0 0f 94 c0 0f b6 c0 e9 48 ea 9f f5 66 2e 0f 1f 84 00 00 00 00 RSP: 0018:ffffc90000a08d80 EFLAGS: 00000002 RAX: 0000000000000000 RBX: ffff8880478ae340 RCX: 00000000ef9d33e4 RDX: 0000000000000000 RSI: ffffffff8dbc628f RDI: ffffffff8bf45140 RBP: ffff888024e1dc00 R08: 0ac0d5affe09d4ff R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 184481bdd8000000 R13: 184481bdd8000000 R14: 0000000000000002 R15: ffff888031d4c410 FS: 00007f8ee79586c0(0000) GS:ffff888124ab8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c2ccd38 CR3: 000000005c814000 CR4: 0000000000350ef0 Call Trace: rcu_read_lock include/linux/rcupdate.h:842 [inline] advance_sched+0x69e/0xc80 net/sched/sch_taprio.c:985 __run_hrtimer kernel/time/hrtimer.c:1761 [inline] __hrtimer_run_queues+0x202/0xad0 kernel/time/hrtimer.c:1825 hrtimer_interrupt+0x397/0x8e0 kernel/time/hrtimer.c:1887 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x10b/0x3f0 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194 Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 36 1d 25 f6 48 89 df e8 de 70 25 f6 f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 01 00 00 00 e8 d5 dc 15 f6 65 8b 05 1e 84 33 08 85 c0 74 16 5b RSP: 0018:ffffc9000bc0fca8 EFLAGS: 00000246 RAX: 0000000000000006 RBX: ffff8880b8427840 RCX: 0000000000000007 RDX: 0000000000000000 RSI: ffffffff8dbeb82e RDI: ffffffff8bf45140 RBP: 0000000000000283 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff90866917 R11: 0000000000000000 R12: 0000000000000000 R13: 1bc16c6985bc5086 R14: dffffc0000000000 R15: ffff8880b8427840 clock_was_set+0x599/0x870 kernel/time/hrtimer.c:972 do_settimeofday64+0x304/0x4b0 kernel/time/timekeeping.c:1381 do_sys_settimeofday64+0x1dc/0x260 kernel/time/time.c:195 __do_sys_clock_settime kernel/time/posix-timers.c:1140 [inline] __se_sys_clock_settime kernel/time/posix-timers.c:1124 [inline] __x64_sys_clock_settime+0x1c1/0x2a0 kernel/time/posix-timers.c:1124 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8ee6b8e169 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:00007f8ee7958038 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3 RAX: ffffffffffffffda RBX: 00007f8ee6db5fa0 RCX: 00007f8ee6b8e169 RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000000000000000 RBP: 00007f8ee6c10a68 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f8ee6db5fa0 R15: 00007ffddaeee5e8