watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.4.284:7211] Modules linked in: irq event stamp: 11897537 hardirqs last enabled at (11897536): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:357 hardirqs last disabled at (11897537): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (11895316): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (11895316): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (11895316): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (11895319): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (11895319): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (11895319): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 7211 Comm: syz.4.284 Not tainted 6.15.0-rc4-syzkaller-g25b6d5def6f8 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:apparmor_socket_sock_rcv_skb+0x4/0x100 security/apparmor/lsm.c:1290 Code: 89 da 5b e9 7e 42 00 00 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <55> 41 57 41 56 41 54 53 49 89 f6 48 89 fb 49 bc 00 00 00 00 00 fc RSP: 0018:ffffc90000006d70 EFLAGS: 00000246 RAX: ffffffff846c5d45 RBX: ffff88803242fa00 RCX: ffff8880269b1e00 RDX: 0000000000000100 RSI: ffff88803242fa00 RDI: ffff88807e3a1980 RBP: ffffc90000006eb0 R08: ffff888062401d9e R09: 0000000000000002 R10: 0000000000000003 R11: 0000000000000100 R12: ffff88807e3a1980 R13: 1ffff92000000dc0 R14: ffff88807e3a1980 R15: dffffc0000000000 FS: 00007fef1a0746c0(0000) GS:ffff8881260ca000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c35689c CR3: 000000005fbee000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: security_sock_rcv_skb+0x93/0x290 security/security.c:4781 sk_filter_trim_cap+0x172/0xa70 net/core/filter.c:151 tcp_filter net/ipv4/tcp_ipv4.c:2152 [inline] tcp_v4_rcv+0x2097/0x2ef0 net/ipv4/tcp_ipv4.c:2342 ip_protocol_deliver_rcu+0x221/0x440 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x2fb/0x580 net/ipv4/ip_input.c:233 NF_HOOK+0x309/0x3a0 include/linux/netfilter.h:314 dst_input include/net/dst.h:469 [inline] ip_sublist_rcv_finish+0x21d/0x2a0 net/ipv4/ip_input.c:578 ip_list_rcv_finish net/ipv4/ip_input.c:627 [inline] ip_sublist_rcv+0x6e7/0x9b0 net/ipv4/ip_input.c:635 ip_list_rcv+0x3e2/0x430 net/ipv4/ip_input.c:669 __netif_receive_skb_list_ptype net/core/dev.c:5930 [inline] __netif_receive_skb_list_core+0x7d2/0x800 net/core/dev.c:5977 __netif_receive_skb_list net/core/dev.c:6029 [inline] netif_receive_skb_list_internal+0x975/0xcc0 net/core/dev.c:6120 gro_normal_list include/net/gro.h:532 [inline] napi_complete_done+0x2f2/0x7c0 net/core/dev.c:6490 virtqueue_napi_complete drivers/net/virtio_net.c:737 [inline] virtnet_poll+0x2385/0x2d70 drivers/net/virtio_net.c:3053 __napi_poll+0xc4/0x480 net/core/dev.c:7324 napi_poll net/core/dev.c:7388 [inline] net_rx_action+0x6ea/0xdf0 net/core/dev.c:7510 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:preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:7090 Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 eb 83 39 f6 e8 86 03 70 f6 fb bf 01 00 00 00 4b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24 RSP: 0018:ffffc90011b66ac0 EFLAGS: 00000282 RAX: 2f5f0127d4c6eb00 RBX: 0000000000000000 RCX: 2f5f0127d4c6eb00 RDX: 0000000000000006 RSI: ffffffff8d74ad15 RDI: 0000000000000001 RBP: ffffc90011b66b70 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200236cd58 irqentry_exit+0x6f/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:unwind_next_frame+0x7/0x2390 arch/x86/kernel/unwind_orc.c:469 Code: 80 c1 03 38 c1 7c 92 48 89 df e8 94 4e b0 00 eb 88 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 <41> 56 41 55 41 54 53 48 81 ec 98 00 00 00 49 89 fe 48 bd 00 00 00 RSP: 0018:ffffc90011b66c30 EFLAGS: 00000202 RAX: 0000000000000001 RBX: ffffc90011b66d00 RCX: 2f5f0127d4c6eb00 RDX: dffffc0000000000 RSI: ffffffff89dffb65 RDI: ffffc90011b66c48 RBP: ffffc90011b66cd0 R08: ffffc90011b66d10 R09: 0000000000000009 R10: ffffc90011b66c98 R11: ffffffff81acaa70 R12: ffff8880269b1e00 R13: ffff8880323d0d80 R14: ffffffff81acaa70 R15: ffffc90011b66c48 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 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __kmalloc_cache_noprof+0x230/0x3d0 mm/slub.c:4372 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] ref_tracker_alloc+0x133/0x460 lib/ref_tracker.c:203 __netdev_tracker_alloc include/linux/netdevice.h:4331 [inline] netdev_hold include/linux/netdevice.h:4360 [inline] dst_init+0xd9/0x450 net/core/dst.c:52 dst_alloc+0x12a/0x170 net/core/dst.c:93 rt_dst_alloc net/ipv4/route.c:1638 [inline] __mkroute_output net/ipv4/route.c:2632 [inline] ip_route_output_key_hash_rcu+0x140d/0x2330 net/ipv4/route.c:2854 ip_route_output_key_hash+0x1b9/0x2e0 net/ipv4/route.c:2683 __ip_route_output_key include/net/route.h:169 [inline] ip_route_connect include/net/route.h:345 [inline] tcp_v4_connect+0x6e5/0x1980 net/ipv4/tcp_ipv4.c:252 __inet_stream_connect+0x295/0xf10 net/ipv4/af_inet.c:677 tcp_sendmsg_fastopen+0x3a7/0x5e0 net/ipv4/tcp.c:1047 tcp_sendmsg_locked+0x4a34/0x5030 net/ipv4/tcp.c:1099 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1366 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0x19c/0x270 net/socket.c:727 ____sys_sendmsg+0x505/0x830 net/socket.c:2566 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2620 __sys_sendmsg net/socket.c:2652 [inline] __do_sys_sendmsg net/socket.c:2657 [inline] __se_sys_sendmsg net/socket.c:2655 [inline] __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2655 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: 0033:0x7fef1918e969 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:00007fef1a074038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fef193b6080 RCX: 00007fef1918e969 RDX: 000000003000c085 RSI: 0000200000000080 RDI: 000000000000000c RBP: 00007fef19210ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fef193b6080 R15: 00007ffd16f7e8a8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 7218 Comm: syz.1.288 Not tainted 6.15.0-rc4-syzkaller-g25b6d5def6f8 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:36 [inline] RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:149 [inline] RIP: 0010:wrmsr arch/x86/include/asm/msr.h:256 [inline] RIP: 0010:native_apic_msr_write+0x39/0x50 arch/x86/include/asm/apic.h:212 Code: 74 2a 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 c3 cc cc cc cc cc f3 0f 1e fa 89 f6 31 d2 e9 b2 3e 7e 03 66 RSP: 0018:ffffc90000a07938 EFLAGS: 00000046 RAX: 00000000000000a2 RBX: ffff8880b8923500 RCX: 0000000000000838 RDX: 0000000000000000 RSI: 00000000000000a2 RDI: 0000000000000838 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000080000 R10: 0000000000000000 R11: ffffffff816f2250 R12: 00000000100058eb R13: dffffc0000000000 R14: 00000000000000a2 R15: 0000000000000020 FS: 0000000000000000(0000) GS:ffff8881261ca000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fef1dcec050 CR3: 00000000568d0000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: apic_write arch/x86/include/asm/apic.h:405 [inline] lapic_next_event+0x11/0x20 arch/x86/kernel/apic/apic.c:415 clockevents_program_event+0x1cc/0x360 kernel/time/clockevents.c:334 hrtimer_interrupt+0x620/0xaa0 kernel/time/hrtimer.c:1900 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+0x180/0x360 kernel/locking/lockdep.c:5870 Code: 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 52 d7 10 48 3b 44 24 58 0f 85 f2 00 00 00 <48> 83 c4 60 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 65 8b RSP: 0018:ffffc90000a07ba0 EFLAGS: 00000246 RAX: 4569623f93abf700 RBX: 0000000000000000 RCX: 4569623f93abf700 RDX: 0000000000000000 RSI: ffffffff8d935ea9 RDI: ffffffff8bc1d460 RBP: ffffffff81ab297d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff81ab297d R12: 0000000000000002 R13: ffffffff8df3b860 R14: 0000000000000000 R15: 0000000000000246 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] is_module_text_address+0x39/0x1e0 kernel/module/main.c:3743 kernel_text_address+0x94/0xe0 kernel/extable.c:119 __kernel_text_address+0xd/0x40 kernel/extable.c:79 unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:369 arch_stack_walk+0xfc/0x150 arch/x86/kernel/stacktrace.c:26 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:2398 [inline] slab_free mm/slub.c:4656 [inline] kfree+0x193/0x440 mm/slub.c:4855 ieee80211_inform_bss+0xbd9/0x10a0 net/mac80211/scan.c:160 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0xd02/0x1ac0 net/wireless/scan.c:2367 cfg80211_inform_bss_data+0x1f6/0x3ad0 net/wireless/scan.c:3222 cfg80211_inform_bss_frame_data+0x362/0x700 net/wireless/scan.c:3317 ieee80211_bss_info_update+0x746/0x9e0 net/mac80211/scan.c:226 ieee80211_scan_rx+0x527/0x9b0 net/mac80211/scan.c:340 __ieee80211_rx_handle_packet net/mac80211/rx.c:5179 [inline] ieee80211_rx_list+0x22fc/0x2d80 net/mac80211/rx.c:5416 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5439 ieee80211_rx include/net/mac80211.h:5179 [inline] ieee80211_handle_queued_frames+0xe8/0x1f0 net/mac80211/main.c:441 tasklet_action_common+0x369/0x580 kernel/softirq.c:829 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:const_folio_flags include/linux/page-flags.h:347 [inline] RIP: 0010:folio_test_head include/linux/page-flags.h:860 [inline] RIP: 0010:folio_test_large include/linux/page-flags.h:881 [inline] RIP: 0010:__folio_remove_rmap mm/rmap.c:1698 [inline] RIP: 0010:folio_remove_rmap_ptes+0x42/0xaf0 mm/rmap.c:1804 Code: 89 f4 48 89 fb 49 bf 00 00 00 00 00 fc ff df e8 f4 6b af ff 48 89 df 4c 89 e6 89 ea 31 c9 e8 35 c3 00 00 4c 8d 73 08 4c 89 f0 <48> c1 e8 03 48 89 44 24 48 42 80 3c 38 00 74 08 4c 89 f7 e8 f6 94 RSP: 0018:ffffc90011c6f390 EFLAGS: 00000282 RAX: ffffea0001e23a08 RBX: ffffea0001e23a00 RCX: ffff88806d8c9e00 RDX: 0000000000000000 RSI: ffffffff8e03cc80 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffff88806d8c9e00 R09: 0000000000000003 R10: 0000000000000002 R11: 0000000000000000 R12: ffffea0001e23a00 R13: ffff88807abb6140 R14: ffffea0001e23a08 R15: dffffc0000000000 zap_present_folio_ptes mm/memory.c:1525 [inline] zap_present_ptes mm/memory.c:1586 [inline] do_zap_pte_range mm/memory.c:1687 [inline] zap_pte_range mm/memory.c:1731 [inline] zap_pmd_range mm/memory.c:1823 [inline] zap_pud_range mm/memory.c:1852 [inline] zap_p4d_range mm/memory.c:1873 [inline] unmap_page_range+0x17f2/0x4210 mm/memory.c:1894 unmap_vmas+0x25d/0x3c0 mm/memory.c:1984 exit_mmap+0x245/0xba0 mm/mmap.c:1284 __mmput+0x118/0x420 kernel/fork.c:1379 exit_mm+0x1da/0x2c0 kernel/exit.c:589 do_exit+0x859/0x2550 kernel/exit.c:940 do_group_exit+0x21c/0x2d0 kernel/exit.c:1102 get_signal+0x125e/0x1310 kernel/signal.c:3034 arch_do_signal_or_restart+0x95/0x780 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [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+0x8b/0x120 kernel/entry/common.c:218 do_syscall_64+0x103/0x210 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fab5df8e969 Code: Unable to access opcode bytes at 0x7fab5df8e93f. RSP: 002b:00007fab5edf00e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 00007fab5e1b5fa8 RCX: 00007fab5df8e969 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fab5e1b5fac RBP: 00007fab5e1b5fa0 R08: 7fffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fab5e1b5fac R13: 0000000000000000 R14: 00007fff0c0765b0 R15: 00007fff0c076698