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BUG: KMSAN: uninit-value in can_receive+0x219/0x5d0 net/can/af_can.c:654
 can_receive+0x219/0x5d0 net/can/af_can.c:654
 can_rcv+0x209/0x3a0 net/can/af_can.c:688
 __netif_receive_skb_one_core net/core/dev.c:5899 [inline]
 __netif_receive_skb+0x42b/0xa00 net/core/dev.c:6012
 process_backlog+0x4ad/0xa50 net/core/dev.c:6360
 __napi_poll+0xe7/0x980 net/core/dev.c:7194
 napi_poll net/core/dev.c:7263 [inline]
 net_rx_action+0xa5a/0x19b0 net/core/dev.c:7385
 handle_softirqs+0x1a0/0x7c0 kernel/softirq.c:561
 __do_softirq+0x14/0x1a kernel/softirq.c:595
 do_softirq+0x9a/0x100 kernel/softirq.c:462
 __local_bh_enable_ip+0x9f/0xb0 kernel/softirq.c:389
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:919 [inline]
 __dev_queue_xmit+0x2758/0x57d0 net/core/dev.c:4682
 dev_queue_xmit include/linux/netdevice.h:3313 [inline]
 can_send+0xf1c/0x13b0 net/can/af_can.c:277
 isotp_sendmsg+0x1b56/0x23a0 net/can/isotp.c:1087
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg+0x30f/0x380 net/socket.c:733
 ____sys_sendmsg+0x91b/0xda0 net/socket.c:2573
 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2627
 __sys_sendmmsg+0x2ff/0x880 net/socket.c:2716
 __do_sys_sendmmsg net/socket.c:2743 [inline]
 __se_sys_sendmmsg net/socket.c:2740 [inline]
 __x64_sys_sendmmsg+0xbc/0x120 net/socket.c:2740
 x64_sys_call+0x33c2/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:308
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4121 [inline]
 slab_alloc_node mm/slub.c:4164 [inline]
 __do_kmalloc_node mm/slub.c:4293 [inline]
 __kmalloc_node_track_caller_noprof+0x945/0x1240 mm/slub.c:4313
 kmalloc_reserve+0x23e/0x4a0 net/core/skbuff.c:537
 pskb_expand_head+0x21f/0x1b70 net/core/skbuff.c:2185
 netif_skb_check_for_xdp net/core/dev.c:5270 [inline]
 netif_receive_generic_xdp net/core/dev.c:5301 [inline]
 do_xdp_generic+0x9e3/0x15a0 net/core/dev.c:5369
 __netif_receive_skb_core+0x2466/0x6cd0 net/core/dev.c:5719
 __netif_receive_skb_one_core net/core/dev.c:5897 [inline]
 __netif_receive_skb+0xca/0xa00 net/core/dev.c:6012
 process_backlog+0x4ad/0xa50 net/core/dev.c:6360
 __napi_poll+0xe7/0x980 net/core/dev.c:7194
 napi_poll net/core/dev.c:7263 [inline]
 net_rx_action+0xa5a/0x19b0 net/core/dev.c:7385
 handle_softirqs+0x1a0/0x7c0 kernel/softirq.c:561
 __do_softirq+0x14/0x1a kernel/softirq.c:595

CPU: 1 UID: 0 PID: 6665 Comm: syz.0.16 Not tainted 6.14.0-rc3-syzkaller-g5cf80612d3f7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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