watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.2.27:6022] Modules linked in: irq event stamp: 11352971 hardirqs last enabled at (11352970): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:310 hardirqs last disabled at (11352971): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (11120456): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (11120456): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (11120456): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (11120459): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (11120459): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (11120459): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 6022 Comm: syz.2.27 Not tainted 6.15.0-syzkaller-gcd7312a78f36 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:80 [inline] RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:102 [inline] RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:227 [inline] RIP: 0010:unwind_next_frame+0x130e/0x2390 arch/x86/kernel/unwind_orc.c:494 Code: c1 e8 3f 48 01 c8 48 83 e0 fe 4c 8d 3c 45 00 00 00 00 49 01 ef 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 <84> c0 75 27 49 63 07 4c 01 f8 49 8d 4f 04 4c 39 e0 48 0f 46 e9 49 RSP: 0018:ffffc900000067f8 EFLAGS: 00000a02 RAX: 0000000000000000 RBX: ffffffff8fbda4f8 RCX: dffffc0000000000 RDX: ffffffff8fbda4bc RSI: ffffffff903d7436 RDI: ffffffff8be287a0 RBP: ffffffff8fbda4bc R08: 0000000000000010 R09: ffffffff81729de5 R10: ffffc900000063c8 R11: fffff52000000c7b R12: ffffffff822427e5 R13: ffffffff8fbda4bc R14: ffffc900000068c8 R15: ffffffff8fbda4d8 FS: 00007fdacfb8d6c0(0000) GS:ffff888125c54000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3060bff8 CR3: 00000000312da000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2381 [inline] slab_free mm/slub.c:4643 [inline] kmem_cache_free+0x18f/0x400 mm/slub.c:4745 skb_release_all net/core/skbuff.c:1150 [inline] __kfree_skb net/core/skbuff.c:1166 [inline] sk_skb_reason_drop+0xe9/0x170 net/core/skbuff.c:1204 kfree_skb_reason include/linux/skbuff.h:1275 [inline] kfree_skb include/linux/skbuff.h:1284 [inline] ip6_mc_input+0x9c3/0xbe0 net/ipv6/ip6_input.c:591 ip_sabotage_in+0x1de/0x270 net/bridge/br_netfilter_hooks.c:993 nf_hook_entry_hookfn include/linux/netfilter.h:157 [inline] nf_hook_slow+0xc2/0x220 net/netfilter/core.c:623 nf_hook include/linux/netfilter.h:272 [inline] NF_HOOK+0x206/0x3a0 include/linux/netfilter.h:315 __netif_receive_skb_one_core net/core/dev.c:5977 [inline] __netif_receive_skb+0xd3/0x380 net/core/dev.c:6090 netif_receive_skb_internal net/core/dev.c:6176 [inline] netif_receive_skb+0x1cb/0x790 net/core/dev.c:6235 NF_HOOK+0xa0/0x390 include/linux/netfilter.h:318 br_handle_frame_finish+0x14d1/0x19b0 net/bridge/br_input.c:-1 br_nf_hook_thresh+0x3c6/0x4a0 net/bridge/br_netfilter_hooks.c:-1 br_nf_pre_routing_finish_ipv6+0x948/0xd00 net/bridge/br_netfilter_ipv6.c:-1 NF_HOOK include/linux/netfilter.h:317 [inline] br_nf_pre_routing_ipv6+0x37e/0x6b0 net/bridge/br_netfilter_ipv6.c:184 nf_hook_entry_hookfn include/linux/netfilter.h:157 [inline] nf_hook_bridge_pre net/bridge/br_input.c:283 [inline] br_handle_frame+0x982/0x14c0 net/bridge/br_input.c:434 __netif_receive_skb_core+0x10e1/0x4180 net/core/dev.c:5863 __netif_receive_skb_one_core net/core/dev.c:5975 [inline] __netif_receive_skb+0x72/0x380 net/core/dev.c:6090 process_backlog+0x60e/0x14f0 net/core/dev.c:6442 __napi_poll+0xc4/0x480 net/core/dev.c:7414 napi_poll net/core/dev.c:7478 [inline] net_rx_action+0x707/0xe30 net/core/dev.c:7605 handle_softirqs+0x286/0x870 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:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:schedule_debug kernel/sched/core.c:5962 [inline] RIP: 0010:__schedule+0x196/0x4d00 kernel/sched/core.c:6682 Code: 24 49 8d 5e 20 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 59 58 bd f6 48 8b 1b 48 89 d8 48 c1 e8 03 42 80 3c 28 00 <74> 08 48 89 df e8 40 58 bd f6 48 81 3b 9d 6e ac 57 0f 85 26 18 00 RSP: 0018:ffffc90005187640 EFLAGS: 00000246 RAX: 1ffff92000a30000 RBX: ffffc90005180000 RCX: 0467356ecc99fa00 RDX: 0000000000000000 RSI: ffffffff8be287e0 RDI: ffffffff8be287a0 RBP: ffffc90005187850 R08: ffffffff8fa101f7 R09: 1ffffffff1f4203e R10: dffffc0000000000 R11: fffffbfff1f4203f R12: ffff8880b863c408 R13: dffffc0000000000 R14: ffff88802e869e00 R15: ffff888125c54000 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7108 irqentry_exit+0x6f/0x90 kernel/entry/common.c:307 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:in_irqentry_text kernel/stacktrace.c:379 [inline] RIP: 0010:filter_irq_stacks+0x52/0xa0 kernel/stacktrace.c:397 Code: f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 04 2d 77 00 49 8b 04 de 48 3d 30 02 00 81 0f 93 c1 48 3d 70 16 00 81 0f 92 c2 <84> d1 75 27 48 3d 30 cd 68 8b 0f 92 c1 48 3d 4b cd 68 8b 0f 93 c0 RSP: 0018:ffffc900051879d8 EFLAGS: 00000206 RAX: ffffffff8942a21a RBX: 0000000000000008 RCX: 0000000000000001 RDX: 0000000000000d00 RSI: 000000000000000b RDI: ffffc90005187a80 RBP: ffffc90005187ca8 R08: 0000000000000000 R09: ffffffff81cf4a16 R10: ffffc90005187488 R11: fffff52000a30e93 R12: 000000000000000b R13: dffffc0000000000 R14: ffffc90005187a80 R15: ffffc90005187ac0 stack_depot_save_flags+0x40/0x900 lib/stackdepot.c:610 kasan_save_stack mm/kasan/common.c:48 [inline] kasan_save_track+0x4f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4148 [inline] slab_alloc_node mm/slub.c:4197 [inline] kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4204 lsm_inode_alloc security/security.c:755 [inline] security_inode_alloc+0x39/0x330 security/security.c:1697 inode_init_always_gfp+0x9ed/0xdc0 fs/inode.c:306 inode_init_always include/linux/fs.h:3277 [inline] alloc_inode+0x82/0x1b0 fs/inode.c:353 new_inode_pseudo include/linux/fs.h:3360 [inline] sock_alloc net/socket.c:622 [inline] __sock_create+0x12d/0x9f0 net/socket.c:1505 sock_create net/socket.c:1599 [inline] __sys_socket_create net/socket.c:1636 [inline] __sys_socket+0xd7/0x1b0 net/socket.c:1683 __do_sys_socket net/socket.c:1697 [inline] __se_sys_socket net/socket.c:1695 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1695 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdaced8e929 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:00007fdacfb8d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007fdacefb5fa0 RCX: 00007fdaced8e929 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000000000000001e RBP: 00007fdacee10b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fdacefb5fa0 R15: 00007ffdbe085e18 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 5853 Comm: kworker/u9:9 Not tainted 6.15.0-syzkaller-gcd7312a78f36 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: hci3 hci_cmd_timeout RIP: 0010:check_kcov_mode kernel/kcov.c:194 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x70 kernel/kcov.c:217 Code: 08 c0 9c 92 65 8b 15 c8 5e dc 10 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 3c 16 00 00 00 74 2c 8b 91 18 16 00 00 <83> fa 02 75 21 48 8b 91 20 16 00 00 48 8b 32 48 8d 7e 01 8b 89 1c RSP: 0018:ffffc90004e2ef28 EFLAGS: 00000246 RAX: ffffffff8b623729 RBX: 0000000000000025 RCX: ffff888033113c00 RDX: 0000000000000000 RSI: 0000000000000025 RDI: 0000000000000000 RBP: ffffffff8b8b8125 R08: ffff888033113c00 R09: 0000000000000002 R10: 0000000000000025 R11: 0000000000000000 R12: ffffffff8b8b8126 R13: ffffc90004e2efd8 R14: 0000000000000000 R15: ffffffff8b8b8125 FS: 0000000000000000(0000) GS:ffff888125d54000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe58dfb6038 CR3: 000000000df38000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: format_decode+0xd9/0xe30 lib/vsprintf.c:2626 vsnprintf+0x102/0xf00 lib/vsprintf.c:2817 sprintf+0xd9/0x120 lib/vsprintf.c:3037 print_time kernel/printk/printk.c:1381 [inline] info_print_prefix+0x155/0x310 kernel/printk/printk.c:1407 record_print_text+0x154/0x430 kernel/printk/printk.c:1456 printk_get_next_message+0x26d/0x7b0 kernel/printk/printk.c:3024 console_emit_next_record kernel/printk/printk.c:3092 [inline] console_flush_all+0x4ca/0xc40 kernel/printk/printk.c:3226 __console_flush_and_unlock kernel/printk/printk.c:3285 [inline] console_unlock+0xc4/0x270 kernel/printk/printk.c:3325 vprintk_emit+0x5b7/0x7a0 kernel/printk/printk.c:2450 _printk+0xcf/0x120 kernel/printk/printk.c:2475 bt_err+0x10b/0x160 net/bluetooth/lib.c:296 hci_cmd_timeout+0xd8/0x1e0 net/bluetooth/hci_core.c:1453 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245