This is a note to let you know that I've just added the patch titled net: fool proof dev_valid_name() to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: net-fool-proof-dev_valid_name.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Tue Apr 10 23:20:08 CEST 2018 From: Eric Dumazet <edumazet@xxxxxxxxxx> Date: Thu, 5 Apr 2018 06:39:26 -0700 Subject: net: fool proof dev_valid_name() From: Eric Dumazet <edumazet@xxxxxxxxxx> [ Upstream commit a9d48205d0aedda021fc3728972a9e9934c2b9de ] We want to use dev_valid_name() to validate tunnel names, so better use strnlen(name, IFNAMSIZ) than strlen(name) to make sure to not upset KASAN. Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- net/core/dev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1025,7 +1025,7 @@ bool dev_valid_name(const char *name) { if (*name == '\0') return false; - if (strlen(name) >= IFNAMSIZ) + if (strnlen(name, IFNAMSIZ) == IFNAMSIZ) return false; if (!strcmp(name, ".") || !strcmp(name, "..")) return false; Patches currently in stable-queue which might be from edumazet@xxxxxxxxxx are queue-4.14/sctp-sctp_sockaddr_af-must-check-minimal-addr-length-for-af_inet6.patch queue-4.14/net-fix-possible-out-of-bound-read-in-skb_network_protocol.patch queue-4.14/pptp-remove-a-buggy-dst-release-in-pptp_connect.patch queue-4.14/net-fool-proof-dev_valid_name.patch queue-4.14/ipv6-the-entire-ipv6-header-chain-must-fit-the-first-fragment.patch queue-4.14/vti6-better-validate-user-provided-tunnel-names.patch queue-4.14/ipv6-sit-better-validate-user-provided-tunnel-names.patch queue-4.14/ip6_tunnel-better-validate-user-provided-tunnel-names.patch queue-4.14/sctp-do-not-leak-kernel-memory-to-user-space.patch queue-4.14/ip_tunnel-better-validate-user-provided-tunnel-names.patch queue-4.14/netlink-make-sure-nladdr-has-correct-size-in-netlink_connect.patch queue-4.14/ip6_gre-better-validate-user-provided-tunnel-names.patch