Re: [PATCH net v2] s390/ctcm: Prevent XID null dereference

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski [off-list ref]:

On Thu, 27 Aug 2026 08:34:08 +0200 you wrote:

The mpc_validate_xid() function sets grp->saved_xid2->xid2_flag2 to 0x40
to signal XID validation error. If peer XID is NULL or r/w channel
pairing mismatch happens, grp->saved_xid2 is never initialized. An
attempt to set the flag in such case leads to NULL dereference.

Fix this by using the always available priv->xid->xid2_flag2 instead of
grp->saved_xid2->xid2_flag2 for validation errors.

[...]

Here is the summary with links:
  - [net,v2] s390/ctcm: Prevent XID null dereference
    https://git.kernel.org/netdev/net/c/b264d8422779

You are awesome, thank you!
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