watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.1.91:6255] Modules linked in: irq event stamp: 11440925 hardirqs last enabled at (11440924): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:357 hardirqs last disabled at (11440925): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (9205652): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (9205652): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (9205652): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (9205655): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (9205655): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (9205655): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 6255 Comm: syz.1.91 Not tainted 6.15.0-rc4-syzkaller-gbfccacdf93f6 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline] RIP: 0010:rcu_preempt_read_enter kernel/rcu/tree_plugin.h:391 [inline] RIP: 0010:__rcu_read_lock+0x5/0x60 kernel/rcu/tree_plugin.h:414 Code: 00 e9 cc fa ff ff 66 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 53 <65> 48 8b 1c 25 08 70 75 92 48 81 c3 44 04 00 00 48 89 d8 48 c1 e8 RSP: 0018:ffffc90000007450 EFLAGS: 00000202 RAX: 0000000000000001 RBX: 00007f06ab38e969 RCX: 11d52041ce660800 RDX: 0000000000000100 RSI: ffffffff8bc1d440 RDI: 00007f06ab38e969 RBP: 0000000000000001 R08: ffffc900000071cf R09: 0000000000000000 R10: ffffc900000071c0 R11: ffffffffa00009d4 R12: ffff88805f260000 R13: ffff88801ff95140 R14: 00007f06ab38e969 R15: 1ffff92000000ea6 FS: 00007f06ac2626c0(0000) GS:ffff8881260c9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3011eff8 CR3: 000000007e098000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: rcu_read_lock include/linux/rcupdate.h:839 [inline] class_rcu_constructor include/linux/rcupdate.h:1155 [inline] is_module_text_address+0x16/0x1e0 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 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:4161 [inline] slab_alloc_node mm/slub.c:4210 [inline] kmem_cache_alloc_node_noprof+0x1bb/0x3c0 mm/slub.c:4262 __alloc_skb+0x112/0x2d0 net/core/skbuff.c:658 __netdev_alloc_skb+0x108/0x970 net/core/skbuff.c:732 netdev_alloc_skb include/linux/skbuff.h:3413 [inline] dev_alloc_skb include/linux/skbuff.h:3426 [inline] __ieee80211_beacon_get+0xe32/0x1630 net/mac80211/tx.c:5475 ieee80211_beacon_get_tim+0xb4/0x2b0 net/mac80211/tx.c:5597 ieee80211_beacon_get include/net/mac80211.h:5648 [inline] mac80211_hwsim_beacon_tx+0x3d2/0x860 drivers/net/wireless/virtual/mac80211_hwsim.c:2313 __iterate_interfaces+0x2a8/0x590 net/mac80211/util.c:761 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:797 mac80211_hwsim_beacon+0xbb/0x1c0 drivers/net/wireless/virtual/mac80211_hwsim.c:2347 __run_hrtimer kernel/time/hrtimer.c:1761 [inline] __hrtimer_run_queues+0x529/0xc60 kernel/time/hrtimer.c:1825 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1842 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_irq_work arch/x86/kernel/irq_work.c:17 [inline] sysvec_irq_work+0xa3/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738 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:ffffc9000b90f960 EFLAGS: 00000286 RAX: 11d52041ce660800 RBX: 0000000000000000 RCX: 11d52041ce660800 RDX: 0000000000000006 RSI: ffffffff8d74ad15 RDI: 0000000000000001 RBP: ffffc9000b90fa10 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92001721f2c 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:__sanitizer_cov_trace_pc+0x43/0x70 kernel/kcov.c:222 Code: 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 16 00 00 48 39 cf 73 08 48 89 3a 48 RSP: 0018:ffffc9000b90fad0 EFLAGS: 00000246 RAX: ffffffff81c905a4 RBX: ffffffff8e8a3f20 RCX: ffff88805f260000 RDX: ffffc9000caa9000 RSI: 0000000000000ac9 RDI: 0000000000000156 RBP: 0000000000000002 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: 0000000000000ac9 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000156 perf_trace_init+0x164/0x2d0 kernel/trace/trace_event_perf.c:223 perf_tp_event_init+0x8d/0x120 kernel/events/core.c:10729 perf_try_init_event+0x176/0x860 kernel/events/core.c:12300 perf_init_event kernel/events/core.c:12398 [inline] perf_event_alloc+0x12bb/0x29b0 kernel/events/core.c:12672 __do_sys_perf_event_open kernel/events/core.c:13171 [inline] __se_sys_perf_event_open+0x6db/0x1c80 kernel/events/core.c:13061 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: 0033:0x7f06ab38e969 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:00007f06ac262038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f06ab5b5fa0 RCX: 00007f06ab38e969 RDX: ffffffffffffffff RSI: 000000000000003c RDI: 0000200000000500 RBP: 00007f06ab410ab1 R08: 0000000000000009 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f06ab5b5fa0 R15: 00007ffffe2f61e8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 1297 Comm: aoe_tx0 Not tainted 6.15.0-rc4-syzkaller-gbfccacdf93f6 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:io_serial_in+0x77/0xc0 drivers/tty/serial/8250/8250_port.c:409 Code: e8 5e 0b 82 fc 44 89 f9 d3 e3 49 83 c6 40 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 0f 35 e4 fc 41 03 1e 89 da ec <0f> b6 c0 5b 41 5c 41 5e 41 5f c3 cc cc cc cc cc 44 89 f9 80 e1 07 RSP: 0018:ffffc9000456ef18 EFLAGS: 00000006 RAX: 1ffffffff3369d05 RBX: 00000000000003f9 RCX: 0000000000000000 RDX: 00000000000003f9 RSI: 0000000000000000 RDI: 0000000000000020 RBP: ffffc9000456f0f0 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: ffffffff853db320 R12: dffffc0000000000 R13: dffffc0000000000 R14: ffffffff99b4ebc0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8881261c9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f14a36e2700 CR3: 000000005f202000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: serial_port_in include/linux/serial_core.h:791 [inline] serial8250_console_write+0x581/0x1ba0 drivers/tty/serial/8250/8250_port.c:3420 console_emit_next_record kernel/printk/printk.c:3138 [inline] console_flush_all+0x725/0xc40 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 dev_vprintk_emit+0x337/0x3f0 drivers/base/core.c:4917 dev_printk_emit+0xe0/0x130 drivers/base/core.c:4928 __netdev_printk+0x3d7/0x4d0 net/core/dev.c:12403 netdev_warn+0x10a/0x160 net/core/dev.c:12456 ieee802154_subif_start_xmit+0x136/0x190 net/mac802154/tx.c:232 __netdev_start_xmit include/linux/netdevice.h:5203 [inline] netdev_start_xmit include/linux/netdevice.h:5212 [inline] xmit_one net/core/dev.c:3776 [inline] dev_hard_start_xmit+0x2ff/0x880 net/core/dev.c:3792 sch_direct_xmit+0x241/0x4b0 net/sched/sch_generic.c:343 __dev_xmit_skb net/core/dev.c:4018 [inline] __dev_queue_xmit+0x17b6/0x3a70 net/core/dev.c:4595 dev_queue_xmit include/linux/netdevice.h:3350 [inline] tx+0x6b/0x190 drivers/block/aoe/aoenet.c:62 kthread+0x1cd/0x3e0 drivers/block/aoe/aoecmd.c:1237 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245