From: Zichen Xie zichenxie0106@gmail.com
[ Upstream commit 49fd4e34751e90e6df009b70cd0659dc839e7ca8 ]
name is char[64] where the size of clnt->cl_program->name remains unknown. Invoking strcat() directly will also lead to potential buffer overflow. Change them to strscpy() and strncat() to fix potential issues.
Signed-off-by: Zichen Xie zichenxie0106@gmail.com Reviewed-by: Benjamin Coddington bcodding@redhat.com Signed-off-by: Anna Schumaker anna.schumaker@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/nfs/sysfs.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/fs/nfs/sysfs.c b/fs/nfs/sysfs.c index bf378ecd5d9fd..7b59a40d40c06 100644 --- a/fs/nfs/sysfs.c +++ b/fs/nfs/sysfs.c @@ -280,9 +280,9 @@ void nfs_sysfs_link_rpc_client(struct nfs_server *server, char name[RPC_CLIENT_NAME_SIZE]; int ret;
- strcpy(name, clnt->cl_program->name); - strcat(name, uniq ? uniq : ""); - strcat(name, "_client"); + strscpy(name, clnt->cl_program->name, sizeof(name)); + strncat(name, uniq ? uniq : "", sizeof(name) - strlen(name) - 1); + strncat(name, "_client", sizeof(name) - strlen(name) - 1);
ret = sysfs_create_link_nowarn(&server->kobj, &clnt->cl_sysfs->kobject, name);