syzbot

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BUG: KMSAN: uninit-value in wq_node_nr_active kernel/workqueue.c:1555 [inline]
BUG: KMSAN: uninit-value in pwq_dec_nr_active kernel/workqueue.c:1930 [inline]
BUG: KMSAN: uninit-value in pwq_dec_nr_in_flight+0x14f/0x1d70 kernel/workqueue.c:1991
 wq_node_nr_active kernel/workqueue.c:1555 [inline]
 pwq_dec_nr_active kernel/workqueue.c:1930 [inline]
 pwq_dec_nr_in_flight+0x14f/0x1d70 kernel/workqueue.c:1991
 process_one_work kernel/workqueue.c:3314 [inline]
 process_scheduled_works+0x171b/0x1d80 kernel/workqueue.c:3340
 worker_thread+0xedf/0x1590 kernel/workqueue.c:3421
 kthread+0xd5c/0xf00 kernel/kthread.c:463
 ret_from_fork+0x208/0x710 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4960 [inline]
 slab_alloc_node mm/slub.c:5263 [inline]
 kmem_cache_alloc_node_noprof+0x9e7/0x17a0 mm/slub.c:5315
 kmalloc_reserve+0x13c/0x4b0 net/core/skbuff.c:586
 __alloc_skb+0x805/0x1040 net/core/skbuff.c:690
 alloc_skb include/linux/skbuff.h:1383 [inline]
 alloc_skb_with_frags+0xc5/0xa60 net/core/skbuff.c:6712
 __virtio_vsock_alloc_skb_with_frags include/linux/virtio_vsock.h:68 [inline]
 virtio_vsock_alloc_linear_skb include/linux/virtio_vsock.h:81 [inline]
 virtio_vsock_alloc_skb include/linux/virtio_vsock.h:87 [inline]
 virtio_transport_alloc_skb+0xcb/0x1350 net/vmw_vsock/virtio_transport_common.c:267
 virtio_transport_send_pkt_info+0xaf1/0x1cd0 net/vmw_vsock/virtio_transport_common.c:390
 virtio_transport_stream_enqueue net/vmw_vsock/virtio_transport_common.c:1113 [inline]
 virtio_transport_seqpacket_enqueue+0x1f0/0x260 net/vmw_vsock/virtio_transport_common.c:841
 vsock_connectible_sendmsg+0x1336/0x1b60 net/vmw_vsock/af_vsock.c:2158
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg+0x333/0x3d0 net/socket.c:742
 ____sys_sendmsg+0x863/0xcf0 net/socket.c:2592
 ___sys_sendmsg+0x271/0x3b0 net/socket.c:2646
 __sys_sendmmsg+0x2d9/0x7c0 net/socket.c:2735
 __do_sys_sendmmsg net/socket.c:2762 [inline]
 __se_sys_sendmmsg net/socket.c:2759 [inline]
 __x64_sys_sendmmsg+0xc6/0x150 net/socket.c:2759
 x64_sys_call+0x2458/0x3e70 arch/x86/include/generated/asm/syscalls_64.h:308
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd3/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 0 UID: 0 PID: 3966 Comm: kworker/u8:22 Tainted: G        W    L      syzkaller #0 PREEMPT(none) 
Tainted: [W]=WARN, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue:  0x0
 (loop2)
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