fou: Prevent unbounded recursion in GUE error handler also with UDP-Lite

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In commit 11789039da ("fou: Prevent unbounded recursion in GUE error
handler"), I didn't take care of the case where UDP-Lite is encapsulated
into UDP or UDP-Lite with GUE. From a syzbot report about a possibly
similar issue with GUE on IPv6, I just realised the same thing might
happen with a UDP-Lite inner payload.

Also skip exception handling for inner UDP-Lite protocol.

Fixes: 11789039da ("fou: Prevent unbounded recursion in GUE error handler")
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Stefano Brivio 2019-01-03 21:43:34 +01:00 • committed by David S. Miller

parent 41e4e2cd75

commit bc6e019b6e

1 changed files with 2 additions and 1 deletions

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net/ipv4/fou.c

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