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BUG: KMSAN: uninit-value in can_receive+0x12c/0x4a0 net/can/af_can.c:656
 can_receive+0x12c/0x4a0 net/can/af_can.c:656
 can_rcv+0x1ff/0x3b0 net/can/af_can.c:690
 __netif_receive_skb_one_core net/core/dev.c:6137 [inline]
 __netif_receive_skb+0x477/0xac0 net/core/dev.c:6250
 process_backlog+0x47c/0x9f0 net/core/dev.c:6602
 __napi_poll+0xd8/0x880 net/core/dev.c:7666
 napi_poll net/core/dev.c:7729 [inline]
 net_rx_action+0xa45/0x1c90 net/core/dev.c:7881
 handle_softirqs+0x169/0x6e0 kernel/softirq.c:622
 __do_softirq+0x14/0x1b kernel/softirq.c:656
 do_softirq+0x99/0x100 kernel/softirq.c:523
 __local_bh_enable_ip+0xa1/0xb0 kernel/softirq.c:450
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:936 [inline]
 __dev_queue_xmit+0x3c32/0x58f0 net/core/dev.c:4844
 dev_queue_xmit include/linux/netdevice.h:3381 [inline]
 can_send+0xffa/0x1390 net/can/af_can.c:279
 isotp_sendmsg+0x1bd3/0x24e0 net/can/isotp.c:1088
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg+0x333/0x3d0 net/socket.c:733
 ____sys_sendmsg+0x863/0xcf0 net/socket.c:2583
 ___sys_sendmsg+0x271/0x3b0 net/socket.c:2637
 __sys_sendmmsg+0x2d9/0x7c0 net/socket.c:2726
 __do_sys_sendmmsg net/socket.c:2753 [inline]
 __se_sys_sendmmsg net/socket.c:2750 [inline]
 __x64_sys_sendmmsg+0xc6/0x150 net/socket.c:2750
 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+0xd9/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4955 [inline]
 slab_alloc_node mm/slub.c:5258 [inline]
 __do_kmalloc_node mm/slub.c:5651 [inline]
 __kmalloc_node_track_caller_noprof+0xb2d/0x1c00 mm/slub.c:5759
 kmalloc_reserve+0x22f/0x4b0 net/core/skbuff.c:608
 pskb_expand_head+0x1fc/0x15d0 net/core/skbuff.c:2282
 netif_skb_check_for_xdp net/core/dev.c:5495 [inline]
 netif_receive_generic_xdp net/core/dev.c:5526 [inline]
 do_xdp_generic+0xa79/0x1690 net/core/dev.c:5594
 __netif_receive_skb_core+0x1b1d/0x4d10 net/core/dev.c:5947
 __netif_receive_skb_one_core net/core/dev.c:6135 [inline]
 __netif_receive_skb+0xcc/0xac0 net/core/dev.c:6250
 process_backlog+0x47c/0x9f0 net/core/dev.c:6602
 __napi_poll+0xd8/0x880 net/core/dev.c:7666
 napi_poll net/core/dev.c:7729 [inline]
 net_rx_action+0xa45/0x1c90 net/core/dev.c:7881
 handle_softirqs+0x169/0x6e0 kernel/softirq.c:622
 __do_softirq+0x14/0x1b kernel/softirq.c:656

CPU: 1 UID: 0 PID: 6474 Comm: syz.0.16 Not tainted syzkaller #0 PREEMPT(none) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
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