ipv6: ioam: fix potential NULL dereferences in __ioam6_fill_trace_data()

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We need to check __in6_dev_get() for possible NULL value, as
suggested by Yiming Qian.

Also add skb_dst_dev_rcu() instead of skb_dst_dev(),
and two missing READ_ONCE().

Note that @dev can't be NULL.

Fixes: 9ee11f0fff ("ipv6: ioam: Data plane support for Pre-allocated Trace")
Reported-by: Yiming Qian <yimingqian591@gmail.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Justin Iurman <justin.iurman@gmail.com>
Link: https://patch.msgid.link/20260402101732.1188059-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Eric Dumazet 2026-04-02 10:17:32 +00:00 • committed by Jakub Kicinski

parent 285fa6b1e0

commit 4e65a8b8da

1 changed files with 16 additions and 11 deletions

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net/ipv6/ioam6.c

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