watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.4.9604:1681] Modules linked in: CPU: 1 PID: 1681 Comm: syz.4.9604 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:check_region_inline mm/kasan/generic.c:169 [inline] RIP: 0010:kasan_check_range+0x13/0x2a0 mm/kasan/generic.c:189 Code: 0f 0b b8 ea ff ff ff c3 0f 0b b8 ea ff ff ff c3 00 00 cc cc 00 00 cc b0 01 48 85 f6 0f 84 c0 01 00 00 55 48 89 e5 41 57 41 56 <41> 55 41 54 53 49 89 f8 49 01 f0 0f 82 1d 02 00 00 49 89 f8 49 c1 RSP: 0018:ffffc90000ebe6f0 EFLAGS: 00000202 RAX: 0000000000000301 RBX: ffff88811a961e80 RCX: ffffffff8467e37d RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff88811a961e80 RBP: ffffc90000ebe700 R08: 0000000000000004 R09: 0000000000ebe703 R10: dffffc0000000000 R11: fffff520001d7cf4 R12: dffffc0000000000 R13: ffff88811a961e00 R14: 0000000000000000 R15: fffffffffffffc18 FS: 00007fb4839846c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000114f28000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37 instrument_atomic_read_write include/linux/instrumented.h:101 [inline] atomic_fetch_add_relaxed include/asm-generic/atomic-instrumented.h:142 [inline] __refcount_add include/linux/refcount.h:193 [inline] __refcount_inc include/linux/refcount.h:250 [inline] refcount_inc include/linux/refcount.h:267 [inline] sock_hold include/net/sock.h:738 [inline] tipc_sk_lookup+0x4dd/0x5f0 net/tipc/socket.c:3001 tipc_sk_rcv+0x350/0x1dc0 net/tipc/socket.c:2490 tipc_node_xmit+0x26c/0xd80 net/tipc/node.c:1674 tipc_node_xmit_skb net/tipc/node.c:1739 [inline] tipc_node_distr_xmit+0x2a3/0x3b0 net/tipc/node.c:1754 tipc_sk_rcv+0x18ed/0x1dc0 net/tipc/socket.c:2499 tipc_node_xmit+0x26c/0xd80 net/tipc/node.c:1674 tipc_sk_push_backlog+0x4dd/0x790 net/tipc/socket.c:1306 tipc_sk_conn_proto_rcv net/tipc/socket.c:1358 [inline] tipc_sk_proto_rcv+0xa65/0x1af0 net/tipc/socket.c:2156 tipc_sk_filter_rcv+0x320e/0x39d0 net/tipc/socket.c:2352 tipc_sk_enqueue net/tipc/socket.c:2444 [inline] tipc_sk_rcv+0x742/0x1dc0 net/tipc/socket.c:2495 tipc_node_xmit+0x26c/0xd80 net/tipc/node.c:1674 tipc_node_xmit_skb net/tipc/node.c:1739 [inline] tipc_node_distr_xmit+0x2a3/0x3b0 net/tipc/node.c:1754 tipc_sk_backlog_rcv+0x17d/0x210 net/tipc/socket.c:2412 sk_backlog_rcv include/net/sock.h:1071 [inline] __release_sock+0x146/0x360 net/core/sock.c:2589 release_sock net/core/sock.c:3142 [inline] sock_setsockopt+0x1840/0x2680 net/core/sock.c:1257 __sys_setsockopt+0x272/0x480 net/socket.c:2142 __do_sys_setsockopt net/socket.c:2157 [inline] __se_sys_setsockopt net/socket.c:2154 [inline] __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2154 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fb484f4ae59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb483984028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fb4851c4090 RCX: 00007fb484f4ae59 RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000008 RBP: 00007fb484fe0d6f R08: 0000000000000004 R09: 0000000000000000 R10: 00002000000001c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb4851c4128 R14: 00007fb4851c4090 R15: 00007ffe983f9c58 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 1680 Comm: syz.4.9604 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline] RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline] RIP: 0010:kvm_wait+0xce/0x130 arch/x86/kernel/kvm.c:926 Code: 38 f0 75 26 41 f7 c4 00 02 00 00 75 0f 0f 1f 44 00 00 0f 00 2d c3 1c b8 03 f4 eb 0e 0f 1f 44 00 00 0f 00 2d b4 1c b8 03 fb f4 <4c> 89 64 24 18 ff 74 24 18 9d 48 c7 44 24 20 0e 36 e0 45 4b c7 04 RSP: 0018:ffffc9000152f6e0 EFLAGS: 00000246 RAX: 0000000000000003 RBX: ffff88811a961e88 RCX: ffffffff814beeba RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff88811a961e88 RBP: ffffc9000152f790 R08: ffff88811a961e88 R09: 1ffff1102352c3d1 R10: dffffc0000000000 R11: ffffed102352c3d2 R12: 0000000000000246 R13: 1ffff1102352c3d1 R14: dffffc0000000000 R15: 1ffff920002a5ee0 FS: 00007fb4839a56c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000003280 CR3: 0000000114f28000 CR4: 00000000003506b0 DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000200000000300 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: pv_wait arch/x86/include/asm/paravirt.h:564 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x714/0xb70 kernel/locking/qspinlock.c:508 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:554 [inline] queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline] do_raw_spin_lock include/linux/spinlock.h:184 [inline] __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline] _raw_spin_lock_bh+0xe4/0xf0 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:360 [inline] lock_sock_nested+0x90/0x2a0 net/core/sock.c:3125 lock_sock include/net/sock.h:1697 [inline] tipc_sendstream+0x47/0x70 net/tipc/socket.c:1540 sock_sendmsg_nosec net/socket.c:652 [inline] __sock_sendmsg net/socket.c:664 [inline] ____sys_sendmsg+0x5b7/0x8f0 net/socket.c:2376 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2430 __sys_sendmsg net/socket.c:2459 [inline] __do_sys_sendmsg net/socket.c:2468 [inline] __se_sys_sendmsg net/socket.c:2466 [inline] __x64_sys_sendmsg+0x1f9/0x2c0 net/socket.c:2466 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fb484f4ae59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb4839a5028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fb4851c3fa0 RCX: 00007fb484f4ae59 RDX: 0000000000000000 RSI: 0000200000003280 RDI: 0000000000000009 RBP: 00007fb484fe0d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb4851c4038 R14: 00007fb4851c3fa0 R15: 00007ffe983f9c58