[PATCH 5/6] e2fsck: check whether ldesc is null before accessing it in end_problem_latch()

[zhanchengbin <zhanchengbin1@xxxxxxxxxx>]

In end_problem_latch(), ldesc need check not NULL before dereference.

Signed-off-by: zhanchengbin <zhanchengbin1@xxxxxxxxxx>
---
 e2fsck/problem.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/e2fsck/problem.c b/e2fsck/problem.c
index f454dcb7..fd814f9e 100644
--- a/e2fsck/problem.c
+++ b/e2fsck/problem.c
@@ -2394,6 +2394,8 @@ int end_problem_latch(e2fsck_t ctx, int mask)
     int answer = -1;

     ldesc = find_latch(mask);
+    if (!ldesc)
+        return answer;
     if (ldesc->end_message && (ldesc->flags & PRL_LATCHED)) {
         clear_problem_context(&pctx);
         answer = fix_problem(ctx, ldesc->end_message, &pctx);
--
2.23.0