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net: fool proof dev_valid_name()
[ Upstream commit a9d48205d0
]
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>
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1 changed files with 1 additions and 1 deletions
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@ -1025,7 +1025,7 @@ bool dev_valid_name(const char *name)
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{
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if (*name == '\0')
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return false;
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if (strlen(name) >= IFNAMSIZ)
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if (strnlen(name, IFNAMSIZ) == IFNAMSIZ)
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return false;
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if (!strcmp(name, ".") || !strcmp(name, ".."))
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return false;
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