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-rw-r--r--sys/geom/geom_disk.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/geom/geom_disk.c b/sys/geom/geom_disk.c
index bddb1c9..9145b3b 100644
--- a/sys/geom/geom_disk.c
+++ b/sys/geom/geom_disk.c
@@ -180,6 +180,8 @@ g_disk_kerneldump(struct bio *bp, struct disk *dp)
di.priv = dp;
di.blocksize = dp->d_sectorsize;
di.mediaoffset = gkd->offset;
+ if ((gkd->offset + gkd->length) > dp->d_mediasize)
+ gkd->length = dp->d_mediasize - gkd->offset;
di.mediasize = gkd->length;
error = set_dumper(&di);
g_io_deliver(bp, error);
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