From 5fa2cffba0b82336a2244d941322eb1627ff787b Mon Sep 17 00:00:00 2001 From: Steve French Date: Tue, 12 Jul 2022 11:43:44 -0500 Subject: smb3: check xattr value length earlier Coverity complains about assigning a pointer based on value length before checking that value length goes beyond the end of the SMB. Although this is even more unlikely as value length is a single byte, and the pointer is not dereferenced until laterm, it is clearer to check the lengths first. Addresses-Coverity: 1467704 ("Speculative execution data leak") Reviewed-by: Ronnie Sahlberg Signed-off-by: Steve French --- fs/cifs/smb2ops.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'fs/cifs/smb2ops.c') diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index 8802995b2d3d..aa4c1d403708 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -1145,9 +1145,7 @@ move_smb2_ea_to_cifs(char *dst, size_t dst_size, size_t name_len, value_len, user_name_len; while (src_size > 0) { - name = &src->ea_data[0]; name_len = (size_t)src->ea_name_length; - value = &src->ea_data[src->ea_name_length + 1]; value_len = (size_t)le16_to_cpu(src->ea_value_length); if (name_len == 0) @@ -1159,6 +1157,9 @@ move_smb2_ea_to_cifs(char *dst, size_t dst_size, goto out; } + name = &src->ea_data[0]; + value = &src->ea_data[src->ea_name_length + 1]; + if (ea_name) { if (ea_name_len == name_len && memcmp(ea_name, name, name_len) == 0) { -- cgit v1.2.3