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| author | Matthieu Baerts (NGI0) <matttbe@kernel.org> | 2024-05-13 18:13:29 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-05-13 18:29:23 -0700 |
| commit | 5eae7a8202f368a77ff0148729a9fa73cc24033a (patch) | |
| tree | f33cc109811e609407169dc5deb3cd0054fb1d20 /net/mptcp/protocol.c | |
| parent | 73c900aa3660dae2050af456d1031d098ab4cb1d (diff) | |
| download | linux-5eae7a8202f368a77ff0148729a9fa73cc24033a.tar.gz linux-5eae7a8202f368a77ff0148729a9fa73cc24033a.tar.bz2 linux-5eae7a8202f368a77ff0148729a9fa73cc24033a.zip | |
mptcp: prefer strscpy over strcpy
strcpy() performs no bounds checking on the destination buffer. This
could result in linear overflows beyond the end of the buffer, leading
to all kinds of misbehaviors. The safe replacement is strscpy() [1].
This is in preparation of a possible future step where all strcpy() uses
will be removed in favour of strscpy() [2].
This fixes CheckPatch warnings:
WARNING: Prefer strscpy over strcpy
Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strcpy [1]
Link: https://github.com/KSPP/linux/issues/88 [2]
Reviewed-by: Geliang Tang <geliang@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Mat Martineau <martineau@kernel.org>
Link: https://lore.kernel.org/r/20240514011335.176158-6-martineau@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/mptcp/protocol.c')
| -rw-r--r-- | net/mptcp/protocol.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index bb8f96f2b86f..a42494d3a71b 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -2814,7 +2814,8 @@ static void mptcp_ca_reset(struct sock *sk) struct inet_connection_sock *icsk = inet_csk(sk); tcp_assign_congestion_control(sk); - strcpy(mptcp_sk(sk)->ca_name, icsk->icsk_ca_ops->name); + strscpy(mptcp_sk(sk)->ca_name, icsk->icsk_ca_ops->name, + sizeof(mptcp_sk(sk)->ca_name)); /* no need to keep a reference to the ops, the name will suffice */ tcp_cleanup_congestion_control(sk); @@ -4169,7 +4170,7 @@ int __init mptcp_proto_v6_init(void) int err; mptcp_v6_prot = mptcp_prot; - strcpy(mptcp_v6_prot.name, "MPTCPv6"); + strscpy(mptcp_v6_prot.name, "MPTCPv6", sizeof(mptcp_v6_prot.name)); mptcp_v6_prot.slab = NULL; mptcp_v6_prot.obj_size = sizeof(struct mptcp6_sock); mptcp_v6_prot.ipv6_pinfo_offset = offsetof(struct mptcp6_sock, np); |