78 lines
2.4 KiB
Diff
78 lines
2.4 KiB
Diff
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Benjamin Marzinski <bmarzins@redhat.com>
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Date: Wed, 7 Aug 2024 18:59:10 -0400
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Subject: [PATCH] libmultipath: fix ontap prioritizer snprintf limits
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The ontap prioritizer functions dump_cdb() and process_sg_error() both
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incorrectly set the snprintf() limits larger than the available space.
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Instead of multiplying the number of elements to print by the size of an
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element to calculate the limit, they multiplied the number of elements
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to print by the maximum number of elements that the buffer could hold.
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Fix this by making these functions use strbufs instead.
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mwilck: removed log message in print_strbuf() failure case.
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Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
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Reviewed-by: Martin Wilck <mwilck@suse.com>
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Signed-off-by: Martin Wilck <mwilck@suse.com>
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---
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libmultipath/prioritizers/ontap.c | 24 +++++++++++-------------
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1 file changed, 11 insertions(+), 13 deletions(-)
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diff --git a/libmultipath/prioritizers/ontap.c b/libmultipath/prioritizers/ontap.c
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index 262e69d2..80ab6ee4 100644
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--- a/libmultipath/prioritizers/ontap.c
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+++ b/libmultipath/prioritizers/ontap.c
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@@ -23,6 +23,7 @@
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#include "prio.h"
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#include "structs.h"
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#include "unaligned.h"
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+#include "strbuf.h"
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#define INQUIRY_CMD 0x12
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#define INQUIRY_CMDLEN 6
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@@ -36,32 +37,29 @@
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static void dump_cdb(unsigned char *cdb, int size)
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{
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int i;
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- char buf[10*5+1];
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- char * p = &buf[0];
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+ STRBUF_ON_STACK(buf);
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- condlog(0, "- SCSI CDB: ");
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- for (i=0; i<size; i++) {
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- p += snprintf(p, 10*(size-i), "0x%02x ", cdb[i]);
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+ for (i = 0; i < size; i++) {
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+ if (print_strbuf(&buf, "0x%02x ", cdb[i]) < 0)
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+ return;
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}
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- condlog(0, "%s", buf);
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+ condlog(0, "- SCSI CDB: %s", get_strbuf_str(&buf));
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}
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static void process_sg_error(struct sg_io_hdr *io_hdr)
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{
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int i;
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- char buf[128*5+1];
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- char * p = &buf[0];
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+ STRBUF_ON_STACK(buf);
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condlog(0, "- masked_status=0x%02x, host_status=0x%02x, "
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"driver_status=0x%02x", io_hdr->masked_status,
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io_hdr->host_status, io_hdr->driver_status);
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if (io_hdr->sb_len_wr > 0) {
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- condlog(0, "- SCSI sense data: ");
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- for (i=0; i<io_hdr->sb_len_wr; i++) {
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- p += snprintf(p, 128*(io_hdr->sb_len_wr-i), "0x%02x ",
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- io_hdr->sbp[i]);
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+ for (i = 0; i < io_hdr->sb_len_wr; i++) {
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+ if (print_strbuf(&buf, "0x%02x ", io_hdr->sbp[i]) < 0)
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+ return;
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}
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- condlog(0, "%s", buf);
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+ condlog(0, "- SCSI sense data: %s", get_strbuf_str(&buf));
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}
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}
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