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BUG: KMSAN: kernel-network-infoleak-after-free in __netdev_start_xmit include/linux/netdevice.h:4841 [inline]
BUG: KMSAN: kernel-network-infoleak-after-free in netdev_start_xmit include/linux/netdevice.h:4857 [inline]
BUG: KMSAN: kernel-network-infoleak-after-free in xmit_one+0x100/0x5f0 net/core/dev.c:3590
 __netdev_start_xmit include/linux/netdevice.h:4841 [inline]
 netdev_start_xmit include/linux/netdevice.h:4857 [inline]
 xmit_one+0x100/0x5f0 net/core/dev.c:3590
 dev_hard_start_xmit+0xe5/0x370 net/core/dev.c:3606
 __dev_queue_xmit+0x1dec/0x31f0 net/core/dev.c:4256
 dev_queue_xmit include/linux/netdevice.h:3009 [inline]
 __netlink_deliver_tap_skb net/netlink/af_netlink.c:307 [inline]
 __netlink_deliver_tap+0x7f6/0xca0 net/netlink/af_netlink.c:325
 netlink_deliver_tap net/netlink/af_netlink.c:338 [inline]
 netlink_deliver_tap_kernel net/netlink/af_netlink.c:347 [inline]
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x10fb/0x1270 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x127d/0x1430 net/netlink/af_netlink.c:1921
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg net/socket.c:734 [inline]
 sock_write_iter+0x495/0x5e0 net/socket.c:1108
 call_write_iter include/linux/fs.h:2191 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x830/0x1570 fs/read_write.c:584
 ksys_write+0x21b/0x4e0 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __x64_sys_write+0x8f/0xd0 fs/read_write.c:646
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Uninit was stored to memory at:
 skb_put_data include/linux/skbuff.h:2579 [inline]
 netlink_to_full_skb net/netlink/af_netlink.c:181 [inline]
 __netlink_deliver_tap_skb net/netlink/af_netlink.c:298 [inline]
 __netlink_deliver_tap+0x575/0xca0 net/netlink/af_netlink.c:325
 netlink_deliver_tap net/netlink/af_netlink.c:338 [inline]
 netlink_deliver_tap_kernel net/netlink/af_netlink.c:347 [inline]
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x10fb/0x1270 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x127d/0x1430 net/netlink/af_netlink.c:1921
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg net/socket.c:734 [inline]
 sock_write_iter+0x495/0x5e0 net/socket.c:1108
 call_write_iter include/linux/fs.h:2191 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x830/0x1570 fs/read_write.c:584
 ksys_write+0x21b/0x4e0 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __x64_sys_write+0x8f/0xd0 fs/read_write.c:646
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Uninit was created at:
 free_pages_prepare mm/page_alloc.c:1410 [inline]
 free_pcp_prepare+0x40/0x640 mm/page_alloc.c:1532
 free_unref_page_prepare mm/page_alloc.c:3387 [inline]
 free_unref_page+0x41/0x940 mm/page_alloc.c:3483
 free_the_page mm/page_alloc.c:770 [inline]
 free_compound_page+0x11a/0x300 mm/page_alloc.c:793
 destroy_large_folio+0x3d/0x50 mm/page_alloc.c:830
 __folio_put_large+0x95/0xa0 mm/swap.c:118
 __folio_put+0x152/0x160 mm/swap.c:126
 folio_put include/linux/mm.h:1159 [inline]
 put_page include/linux/mm.h:1211 [inline]
 __skb_frag_unref include/linux/skbuff.h:3385 [inline]
 skb_release_data+0x7bb/0xf40 net/core/skbuff.c:783
 skb_release_all net/core/skbuff.c:854 [inline]
 napi_consume_skb+0x19d/0x560 net/core/skbuff.c:1111
 skb_defer_free_flush net/core/dev.c:6646 [inline]
 net_rx_action+0x4dc/0x1a20 net/core/dev.c:6667
 __do_softirq+0x1c5/0x7b9 kernel/softirq.c:571

Bytes 64688-64703 of 64704 are uninitialized
Memory access of size 64704 starts at ffff888125710000

CPU: 0 PID: 3493 Comm: syz-executor229 Not tainted 6.1.0-rc4-syzkaller-62818-gb1376a14297d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
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