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From 760365f94409ccccbcb54d55070f0f422bee44a1 Mon Sep 17 00:00:00 2001
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From: Jes Sorensen <jsorensen@fb.com>
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Date: Tue, 29 May 2018 15:52:48 -0400
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Subject: [RHEL7.5 PATCH 11/26] Do not confuse gcc
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gcc-8.1's -Werror=stringop-truncation is easily confused. Rather than
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disabling the check, make it explicit we are OK truncating here.
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Signed-off-by: Jes Sorensen <jsorensen@fb.com>
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---
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super-intel.c | 8 +++++++-
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1 file changed, 7 insertions(+), 1 deletion(-)
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diff --git a/super-intel.c b/super-intel.c
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index ce08af4..449da1d 100644
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--- a/super-intel.c
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+++ b/super-intel.c
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@@ -5323,6 +5323,7 @@ static int init_super_imsm_volume(struct supertype *st, mdu_array_info_t *info,
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struct imsm_map *map;
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int idx = mpb->num_raid_devs;
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int i;
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+ int namelen;
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unsigned long long array_blocks;
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size_t size_old, size_new;
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unsigned long long num_data_stripes;
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@@ -5402,7 +5403,12 @@ static int init_super_imsm_volume(struct supertype *st, mdu_array_info_t *info,
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return 0;
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dv = xmalloc(sizeof(*dv));
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dev = xcalloc(1, sizeof(*dev) + sizeof(__u32) * (info->raid_disks - 1));
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- strncpy((char *) dev->volume, name, MAX_RAID_SERIAL_LEN);
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+ /*
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+ * Explicitly allow truncating to not confuse gcc's
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+ * -Werror=stringop-truncation
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+ */
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+ namelen = min((int) strlen(name), MAX_RAID_SERIAL_LEN);
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+ memcpy(dev->volume, name, namelen);
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array_blocks = calc_array_size(info->level, info->raid_disks,
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info->layout, info->chunk_size,
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s->size * BLOCKS_PER_KB);
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--
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2.7.4
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