From: Martin Wilck <mwilck@xxxxxxxx>
This changes no semantics, but it will allow changing the size of
prin_readfd.private_buffer in a follow-up patch.
Reviewed-by: Benjamin Marzinski <bmarzins@xxxxxxxxxx>
Signed-off-by: Martin Wilck <mwilck@xxxxxxxx>
---
libmpathpersist/mpath_pr_ioctl.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/libmpathpersist/mpath_pr_ioctl.c b/libmpathpersist/mpath_pr_ioctl.c
index c78e8000..fadc9e10 100644
--- a/libmpathpersist/mpath_pr_ioctl.c
+++ b/libmpathpersist/mpath_pr_ioctl.c
@@ -238,6 +238,8 @@ static void mpath_format_readfullstatus(struct prin_resp *pr_buff)
uint32_t additional_length, k, tid_len_len = 0;
char tempbuff[MPATH_MAX_PARAM_LEN];
struct prin_fulldescr fdesc;
+ static const int pbuf_size =
+ sizeof(pr_buff->prin_descriptor.prin_readfd.private_buffer);
convert_be32_to_cpu(&pr_buff->prin_descriptor.prin_readfd.prgeneration);
convert_be32_to_cpu(&pr_buff->prin_descriptor.prin_readfd.number_of_descriptor);
@@ -249,16 +251,18 @@ static void mpath_format_readfullstatus(struct prin_resp *pr_buff)
}
additional_length = pr_buff->prin_descriptor.prin_readfd.number_of_descriptor;
- if (additional_length > MPATH_MAX_PARAM_LEN) {
+ if (additional_length > pbuf_size) {
condlog(3, "PRIN length %u exceeds max length %d", additional_length,
- MPATH_MAX_PARAM_LEN);
+ pbuf_size);
return;
}
memset(&fdesc, 0, sizeof(struct prin_fulldescr));
- memcpy( tempbuff, pr_buff->prin_descriptor.prin_readfd.private_buffer,MPATH_MAX_PARAM_LEN );
- memset(&pr_buff->prin_descriptor.prin_readfd.private_buffer, 0, MPATH_MAX_PARAM_LEN);
+ memcpy( tempbuff, pr_buff->prin_descriptor.prin_readfd.private_buffer,
+ pbuf_size);
+ memset(&pr_buff->prin_descriptor.prin_readfd.private_buffer, 0,
+ pbuf_size);
p =(unsigned char *)tempbuff;
ppbuff = (char *)pr_buff->prin_descriptor.prin_readfd.private_buffer;
--
2.25.1
--
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