watchdog: BUG: soft lockup - CPU#1 stuck for 144s! [syz.2.187:6438] Modules linked in: irq event stamp: 12438655 hardirqs last enabled at (12438654): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:357 hardirqs last disabled at (12438655): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (12357498): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (12357498): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (12357498): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (12357501): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (12357501): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (12357501): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 1 UID: 0 PID: 6438 Comm: syz.2.187 Not tainted 6.15.0-rc4-syzkaller-g38d976c32d85 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 RIP: 0010:unwind_get_return_address+0x4/0x90 arch/x86/kernel/unwind_orc.c:365 Code: e8 b1 17 b0 00 4c 89 f7 4c 89 fe e9 29 ff ff ff e8 71 3e e4 09 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <41> 57 41 56 53 48 89 fb 49 be 00 00 00 00 00 fc ff df 48 89 f8 48 RSP: 0018:ffffc90000a08460 EFLAGS: 00000202 RAX: 000000001bb67301 RBX: ffffc90000a08520 RCX: 3ed01bc807a6f300 RDX: 0000000000000002 RSI: ffffffff8d93512e RDI: ffffc90000a08468 RBP: ffffc90000a084f0 R08: ffffc90000a0814f R09: 0000000000000000 R10: ffffc90000a08140 R11: ffffffffa000084c R12: ffff88807ad71e00 R13: ffff88802832dd80 R14: ffffffff81acaa70 R15: ffffc90000a08468 FS: 00007f7fed8bf6c0(0000) GS:ffff8881261cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000030828000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 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 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] dst_cow_metrics_generic+0x56/0x1c0 net/core/dst.c:193 dst_metrics_write_ptr include/net/dst.h:133 [inline] dst_metric_set include/net/dst.h:194 [inline] icmp6_dst_alloc+0x261/0x420 net/ipv6/route.c:3328 ndisc_send_skb+0x41f/0x1400 net/ipv6/ndisc.c:493 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_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:rcu_read_unlock_special+0x87/0x4c0 kernel/rcu/tree_plugin.h:694 Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 e2 a3 cd 10 41 f7 c6 00 00 f0 00 74 49 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b RSP: 0018:ffffc9001bb672c0 EFLAGS: 00000206 RAX: 3ed01bc807a6f300 RBX: 1ffff9200376ce60 RCX: 3ed01bc807a6f300 RDX: 0000000000000000 RSI: ffffffff8d749fcc RDI: ffffffff8bc1cde0 RBP: ffffc9001bb673b8 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: ffffffff8df40c00 R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002 __rcu_read_unlock+0x84/0xe0 kernel/rcu/tree_plugin.h:438 rcu_read_unlock include/linux/rcupdate.h:873 [inline] class_rcu_destructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0x19ae/0x2390 arch/x86/kernel/unwind_orc.c:680 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:47 kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:548 __call_rcu_common kernel/rcu/tree.c:3082 [inline] call_rcu+0x142/0x990 kernel/rcu/tree.c:3202 context_switch kernel/sched/core.c:5385 [inline] __schedule+0x16ea/0x4cd0 kernel/sched/core.c:6767 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7090 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:__module_get+0x34/0x40 kernel/module/main.c:850 Code: 48 8d 87 e8 04 00 00 48 89 fb 48 89 c7 be 04 00 00 00 e8 ff aa 76 00 f0 ff 83 e8 04 00 00 48 8b 74 24 08 48 89 df 5b eb 1d 5b cc cc cc cc cc 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc9001bb67d00 EFLAGS: 00000246 RAX: ffffffff8936c2a3 RBX: ffff88805c3ddc80 RCX: 0000000000000000 RDX: ffff88807ad71e00 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000dc0 R09: 00000000ffffffff R10: 000000000000000c R11: ffffffffa000084c R12: 1ffff1100b87bc3a R13: dffffc0000000000 R14: ffff88805c3de1d0 R15: ffff88805c3de042 sk_owner_set include/net/sock.h:1595 [inline] sock_lock_init+0x7a/0x870 net/core/sock.c:-1 sk_alloc+0xf1/0x370 net/core/sock.c:2263 inet6_create+0x7fd/0x12a0 net/ipv6/af_inet6.c:193 __sock_create+0x4b0/0x9f0 net/socket.c:1541 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+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7fec98e969 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:00007f7fed8bf038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f7fecbb5fa0 RCX: 00007f7fec98e969 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 000000000000000a RBP: 00007f7feca10ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f7fecbb5fa0 R15: 00007fff01d904c8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 1299 Comm: aoe_tx0 Not tainted 6.15.0-rc4-syzkaller-g38d976c32d85 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 RIP: 0010:io_serial_out+0x7c/0xc0 drivers/tty/serial/8250/8250_port.c:416 Code: 43 82 fc 44 89 f9 d3 e5 49 83 c6 40 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 1c 34 e4 fc 41 03 2e 89 d8 89 ea ee <5b> 41 5c 41 5e 41 5f 5d c3 cc cc cc cc cc 44 89 f9 80 e1 07 38 c1 RSP: 0018:ffffc900044f6f10 EFLAGS: 00000006 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 00000000000003f9 RSI: 0000000000000000 RDI: 0000000000000020 RBP: 00000000000003f9 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: ffffffff853d7b30 R12: dffffc0000000000 R13: dffffc0000000000 R14: ffffffff99b4bbc0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8881260cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9a594a8bd0 CR3: 000000002e3ee000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff1 DR7: 0000000000000600 Call Trace: serial_out drivers/tty/serial/8250/8250.h:142 [inline] serial8250_clear_IER drivers/tty/serial/8250/8250_port.c:-1 [inline] serial8250_console_write+0x5ef/0x1ba0 drivers/tty/serial/8250/8250_port.c:3421 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