hsr: Prevent use after free in prp_create_tagged_frame()

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[ Upstream commit 876f8ab523 ]

The prp_fill_rct() function can fail.  In that situation, it frees the
skb and returns NULL.  Meanwhile on the success path, it returns the
original skb.  So it's straight forward to fix bug by using the returned
value.

Fixes: 451d8123f8 ("net: prp: add packet handling support")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Link: https://lore.kernel.org/r/57af1f28-7f57-4a96-bcd3-b7a0f2340845@moroto.mountain
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Dan Carpenter 2023-10-27 15:19:01 +03:00 • committed by Greg Kroah-Hartman

parent f980e9a57d

commit 6086258bd5

1 changed files with 1 additions and 3 deletions

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net/hsr/hsr_forward.c

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