system/linux
system/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux synced 2024-07-21 10:41:44 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

net: sched: Replace strlcpy with strscpy

Browse source 
strlcpy() reads the entire source buffer first.
This read may exceed the destination size limit.
This is both inefficient and can lead to linear read
overflows if a source string is not NUL-terminated [1].
In an effort to remove strlcpy() completely [2], replace
strlcpy() here with strscpy().

Direct replacement is safe here since return value of -errno
is used to check for truncation instead of sizeof(dest).

[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy
[2] https://github.com/KSPP/linux/issues/89

Signed-off-by: Azeem Shaikh <azeemshaikh38@gmail.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Azeem Shaikh 2023-07-10 03:07:11 +00:00 committed by David S. Miller
parent 87355b7c3d
commit 989b52cdc8
1 changed files with 1 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
net/sched/act_api.c
View file

@ -1320,7 +1320,7 @@ struct tc_action_ops *tc_action_load_ops(struct nlattr *nla, bool police,
return ERR_PTR(err);
}
} else {
if (strlcpy(act_name, "police", IFNAMSIZ) >= IFNAMSIZ) {
if (strscpy(act_name, "police", IFNAMSIZ) < 0) {
NL_SET_ERR_MSG(extack, "TC action name too long");
return ERR_PTR(-EINVAL);
}