File 0201-imsm-fix-reading-scsi-serial.patch of Package mdadm.7989

From 01a052b9c1c6bdc7307a3f8e8d12db262d9b258c Mon Sep 17 00:00:00 2001
From: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Date: Thu, 2 Nov 2017 16:10:57 +0100
Subject: [PATCH] imsm: fix reading scsi serial
Git-commit: 01a052b9c1c6bdc7307a3f8e8d12db262d9b258c
Patch-mainline: mdadm-4.0+
References: bsc#1069165, bsc#1069167, bsc#1068030

Improve error detection after SG_IO ioctl. Checking only the return
value and response length is insufficient and leads to anomalies if a
drive does not have a serial number.

Reported-by: NeilBrown <neilb@suse.com>
Tested-by: NeilBrown <neilb@suse.com>
Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Signed-off-by: Jes Sorensen <jsorensen@fb.com>
Signed-off-by: Coly Li <colyli@suse.de>

---
 sg_io.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sg_io.c b/sg_io.c
index 42c91e1..7889a95 100644
--- a/sg_io.c
+++ b/sg_io.c
@@ -46,6 +46,9 @@ int scsi_get_serial(int fd, void *buf, size_t buf_len)
 	if (rv)
 		return rv;
 
+	if ((io_hdr.info & SG_INFO_OK_MASK) != SG_INFO_OK)
+		return -1;
+
 	rsp_len = rsp_buf[3];
 
 	if (!rsp_len || buf_len < rsp_len)
-- 
2.13.6
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