when we excute mdadm --assemble, udev-md-raid-assembly.rules is triggered.
Then we stop array, we found an coredump for mdadm --incremental.func
stack are as follows:
#0 enough (level=10, raid_disks=4, layout=258, clean=1,
avail=avail@entry=0x0) at util.c:555
#1 0x0000562170c26965 in Incremental (devlist=<optimized out>,
c=<optimized out>, st=0x5621729b6dc0) at Incremental.c:514
#2 0x0000562170bfb6ff in main (argc=<optimized out>,
argv=<optimized out>) at mdadm.c:1762
func enough() use array avail,avail allocate space in func count_active,
it may not alloc space, causing a coredump.We fix this coredump.
Signed-off-by: Guanqin Miao <miaoguanqin@xxxxxxxxxx>
Signed-off-by: lixiaokeng <lixiaokeng@xxxxxxxxxx>
---
Incremental.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/Incremental.c b/Incremental.c
index 09b94b9f..49a71f72 100644
--- a/Incremental.c
+++ b/Incremental.c
@@ -507,6 +507,9 @@ int Incremental(struct mddev_dev *devlist, struct context *c,
GET_OFFSET | GET_SIZE));
active_disks = count_active(st, sra, mdfd, &avail, &info);
+ if (!avail)
+ goto out_unlock;
+
journal_device_missing = (info.journal_device_required) && (info.journal_clean == 0);
if (info.consistency_policy == CONSISTENCY_POLICY_PPL)
--
2.33.0
