(Online Capacity Expansion for IMSM)
For external metadata case free() operation causes core.
The cause of this is too small memory allocation due to empty array.spare_disks number for external metadata used for required memory allocation size computing.
To resolve this situation requested number of disks is used as allocated buffer size for external metadata.
Signed-off-by: Adam Kwolek <adam.kwolek@xxxxxxxxx>
---
Grow.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/Grow.c b/Grow.c
index 29a6394..ab83e31 100644
--- a/Grow.c
+++ b/Grow.c
@@ -1103,7 +1103,10 @@ int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
rv = 1;
break;
}
- nrdisks = array.nr_disks + sra->array.spare_disks;
+ if ((st == NULL) || (st->ss->external == 0))
+ nrdisks = array.nr_disks + sra->array.spare_disks;
+ else
+ nrdisks = (raid_disks > array.nr_disks) ? raid_disks :
+array.nr_disks;
/* Now we need to open all these devices so we can read/write.
*/
fdlist = malloc((1+nrdisks) * sizeof(int));
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