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linux/net/dns_resolver
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David Howells d76718ca20 keys, dns: Fix size check of V1 server-list header 
[ Upstream commit acc657692a ]

Fix the size check added to dns_resolver_preparse() for the V1 server-list
header so that it doesn't give EINVAL if the size supplied is the same as
the size of the header struct (which should be valid).

This can be tested with:

        echo -n -e '\0\0\01\xff\0\0' | keyctl padd dns_resolver desc @p

which will give "add_key: Invalid argument" without this fix.

Fixes: 1997b3cb42 ("keys, dns: Fix missing size check of V1 server-list header")
Reported-by: Pengfei Xu <pengfei.xu@intel.com>
Link: https://lore.kernel.org/r/ZZ4fyY4r3rqgZL+4@xpf.sh.intel.com/
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-01-25 15:44:44 -08:00
..
dns_key.c keys, dns: Fix size check of V1 server-list header 2024-01-25 15:44:44 -08:00
dns_query.c docs: networking: convert dns_resolver.txt to ReST 2020-04-28 14:39:46 -07:00
internal.h KEYS: Merge the type-specific data with the payload data 2015-10-21 15:18:36 +01:00
Kconfig net: remove redundant 'depends on NET' 2021-01-27 17:04:12 -08:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00