net: core: check skb_frags_readable before uncloning in skb_copy_ubufs

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skb_copy_ubufs drops clones and modifies the SKB via pskb_expand_head()
before checking for !skb_frags_readable(skb). This alters the SKB
geometry prior to throwing an -EFAULT on an invalid SKB. Check
readability first.

Fixes: 65249feb6b ("net: add support for skbs with unreadable frags")
Signed-off-by: Mina Almasry <almasrymina@google.com>
Link: https://patch.msgid.link/20260823183602.1051453-1-almasrymina@google.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

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Mina Almasry 2026-08-23 18:36:01 +00:00 • committed by Paolo Abeni

parent 2db9bfa3e2

commit 00e11ee983

1 changed files with 3 additions and 3 deletions

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net/core/skbuff.c

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