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| author | Eric Dumazet <edumazet@google.com> | 2018-04-05 06:39:26 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-13 19:50:26 +0200 |
| commit | 954d71e7c63fe55e707a899345a504aa97510121 (patch) | |
| tree | 4cb62e229e55b847102c5a3166ea28c3c6513ed3 | |
| parent | 6773caa6ac54b84281113ce42d0557d4962380d7 (diff) | |
net: fool proof dev_valid_name()
[ 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@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/core/dev.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index ebf75524d252..dc63c37d5301 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -989,7 +989,7 @@ 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; |