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BUG: KMSAN: uninit-value in ___bpf_prog_run+0xa4d1/0xe0f0 kernel/bpf/core.c:2072
 ___bpf_prog_run+0xa4d1/0xe0f0 kernel/bpf/core.c:2072
 __bpf_prog_run512+0xb5/0xe0 kernel/bpf/core.c:2238
 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline]
 __bpf_prog_run include/linux/filter.h:657 [inline]
 bpf_prog_run include/linux/filter.h:664 [inline]
 __bpf_prog_run_save_cb include/linux/filter.h:787 [inline]
 bpf_prog_run_save_cb include/linux/filter.h:801 [inline]
 sk_filter_trim_cap+0x38d/0xbb0 net/core/filter.c:158
 sk_filter include/linux/filter.h:909 [inline]
 sock_queue_rcv_skb_reason+0x46/0x1a0 net/core/sock.c:521
 sock_queue_rcv_skb include/net/sock.h:2447 [inline]
 packet_rcv_spkt+0x704/0x930 net/packet/af_packet.c:1919
 deliver_skb net/core/dev.c:2188 [inline]
 deliver_ptype_list_skb net/core/dev.c:2203 [inline]
 __netif_receive_skb_core+0x48df/0x6190 net/core/dev.c:5489
 __netif_receive_skb_one_core net/core/dev.c:5536 [inline]
 __netif_receive_skb+0xca/0xa00 net/core/dev.c:5652
 netif_receive_skb_internal net/core/dev.c:5738 [inline]
 netif_receive_skb+0x58/0x660 net/core/dev.c:5798
 tun_rx_batched+0x3ee/0x980 drivers/net/tun.c:1549
 tun_get_user+0x5566/0x69e0 drivers/net/tun.c:2002
 tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2048
 call_write_iter include/linux/fs.h:2110 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0xb63/0x1520 fs/read_write.c:590
 ksys_write+0x20f/0x4c0 fs/read_write.c:643
 __do_sys_write fs/read_write.c:655 [inline]
 __se_sys_write fs/read_write.c:652 [inline]
 __x64_sys_write+0x93/0xe0 fs/read_write.c:652
 do_syscall_64+0xd5/0x1f0
 entry_SYSCALL_64_after_hwframe+0x72/0x7a

Uninit was stored to memory at:
 ___bpf_prog_run+0x9098/0xe0f0
 __bpf_prog_run512+0xb5/0xe0 kernel/bpf/core.c:2238
 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline]
 __bpf_prog_run include/linux/filter.h:657 [inline]
 bpf_prog_run include/linux/filter.h:664 [inline]
 __bpf_prog_run_save_cb include/linux/filter.h:787 [inline]
 bpf_prog_run_save_cb include/linux/filter.h:801 [inline]
 sk_filter_trim_cap+0x38d/0xbb0 net/core/filter.c:158
 sk_filter include/linux/filter.h:909 [inline]
 sock_queue_rcv_skb_reason+0x46/0x1a0 net/core/sock.c:521
 sock_queue_rcv_skb include/net/sock.h:2447 [inline]
 packet_rcv_spkt+0x704/0x930 net/packet/af_packet.c:1919
 deliver_skb net/core/dev.c:2188 [inline]
 deliver_ptype_list_skb net/core/dev.c:2203 [inline]
 __netif_receive_skb_core+0x48df/0x6190 net/core/dev.c:5489
 __netif_receive_skb_one_core net/core/dev.c:5536 [inline]
 __netif_receive_skb+0xca/0xa00 net/core/dev.c:5652
 netif_receive_skb_internal net/core/dev.c:5738 [inline]
 netif_receive_skb+0x58/0x660 net/core/dev.c:5798
 tun_rx_batched+0x3ee/0x980 drivers/net/tun.c:1549
 tun_get_user+0x5566/0x69e0 drivers/net/tun.c:2002
 tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2048
 call_write_iter include/linux/fs.h:2110 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0xb63/0x1520 fs/read_write.c:590
 ksys_write+0x20f/0x4c0 fs/read_write.c:643
 __do_sys_write fs/read_write.c:655 [inline]
 __se_sys_write fs/read_write.c:652 [inline]
 __x64_sys_write+0x93/0xe0 fs/read_write.c:652
 do_syscall_64+0xd5/0x1f0
 entry_SYSCALL_64_after_hwframe+0x72/0x7a

Local variable stack created at:
 __bpf_prog_run512+0x45/0xe0 kernel/bpf/core.c:2238
 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline]
 __bpf_prog_run include/linux/filter.h:657 [inline]
 bpf_prog_run include/linux/filter.h:664 [inline]
 __bpf_prog_run_save_cb include/linux/filter.h:787 [inline]
 bpf_prog_run_save_cb include/linux/filter.h:801 [inline]
 sk_filter_trim_cap+0x38d/0xbb0 net/core/filter.c:158

CPU: 1 PID: 6489 Comm: syz-executor.0 Tainted: G        W          6.9.0-rc2-syzkaller-00207-ge8b0ccb2a787 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
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