Hello:
This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@xxxxxxxxxx>:
On Thu, 7 Aug 2025 15:40:11 -0400 you wrote:
> A cloned head skb still shares these frag skbs in fraglist with the
> original head skb. It's not safe to access these frag skbs.
>
> syzbot reported two use-of-uninitialized-memory bugs caused by this:
>
> BUG: KMSAN: uninit-value in sctp_inq_pop+0x15b7/0x1920 net/sctp/inqueue.c:211
> sctp_inq_pop+0x15b7/0x1920 net/sctp/inqueue.c:211
> sctp_assoc_bh_rcv+0x1a7/0xc50 net/sctp/associola.c:998
> sctp_inq_push+0x2ef/0x380 net/sctp/inqueue.c:88
> sctp_backlog_rcv+0x397/0xdb0 net/sctp/input.c:331
> sk_backlog_rcv+0x13b/0x420 include/net/sock.h:1122
> __release_sock+0x1da/0x330 net/core/sock.c:3106
> release_sock+0x6b/0x250 net/core/sock.c:3660
> sctp_wait_for_connect+0x487/0x820 net/sctp/socket.c:9360
> sctp_sendmsg_to_asoc+0x1ec1/0x1f00 net/sctp/socket.c:1885
> sctp_sendmsg+0x32b9/0x4a80 net/sctp/socket.c:2031
> inet_sendmsg+0x25a/0x280 net/ipv4/af_inet.c:851
> sock_sendmsg_nosec net/socket.c:718 [inline]
>
> [...]
Here is the summary with links:
- [net] sctp: linearize cloned gso packets in sctp_rcv
https://git.kernel.org/netdev/net/c/fd60d8a08619
You are awesome, thank you!
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