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| author | Dr. David Alan Gilbert <linux@treblig.org> | 2022-10-29 02:46:04 +0100 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-11-01 21:14:39 -0700 |
| commit | 44827016be44c6b2634a92ebbdb3d95610ff5268 (patch) | |
| tree | 1d383322e95c17805f57b861b985ad983709f60c /net | |
| parent | 6f1a298b2e24c703bfcc643e41bc7c0604fe4830 (diff) | |
| download | linux-next-44827016be44c6b2634a92ebbdb3d95610ff5268.tar.gz | |
net: core: inet[46]_pton strlen len types
inet[46]_pton check the input length against
a sane length limit (INET[6]_ADDRSTRLEN), but
the strlen value gets truncated due to being stored in an int,
so there's a theoretical potential for a >4G string to pass
the limit test.
Use size_t since that's what strlen actually returns.
I've had a hunt for callers that could hit this, but
I've not managed to find anything that doesn't get checked with
some other limit first; but it's possible that I've missed
something in the depth of the storage target paths.
Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Link: https://lore.kernel.org/r/20221029014604.114024-1-linux@treblig.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/utils.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/core/utils.c b/net/core/utils.c index 938495bc1d34..c994e95172ac 100644 --- a/net/core/utils.c +++ b/net/core/utils.c @@ -302,7 +302,7 @@ static int inet4_pton(const char *src, u16 port_num, struct sockaddr_storage *addr) { struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; - int srclen = strlen(src); + size_t srclen = strlen(src); if (srclen > INET_ADDRSTRLEN) return -EINVAL; @@ -322,7 +322,7 @@ static int inet6_pton(struct net *net, const char *src, u16 port_num, { struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; const char *scope_delim; - int srclen = strlen(src); + size_t srclen = strlen(src); if (srclen > INET6_ADDRSTRLEN) return -EINVAL; |