ocfs2: fix panic in failed foilio allocation

Commit Message

Mark Tinguely April 10, 2025, 7:56 p.m. UTC

In commit 7e119cff9d0a, "ocfs2: convert w_pages to w_folios" the
chunk page allocations became order 0 folio allocations. If an
allocation failed, the folio array entry should be NULL so the
error path can skip the entry. In the port it is -ENOMEM and
the error path panics trying to free this bad value.

Signed-off-by: Mark Tinguely <[e-mail]>
Cc: [e-mail]
Cc: Changwei Ge <[e-mail]>
Cc: Joel Becker <[e-mail]>
Cc: Jun Piao <[e-mail]>
Cc: Junxiao Bi <[e-mail]>
Cc: Mark Fasheh <[e-mail]>
---
  fs/ocfs2/aops.c | 1 +
  1 file changed, 1 insertion(+)

  		}

Patch

diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index 40b6bce12951..89aadc6cdd87 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -1071,6 +1071,7 @@  static int ocfs2_grab_folios_for_write(struct 
address_space *mapping,
  			if (IS_ERR(wc->w_folios[i])) {
  				ret = PTR_ERR(wc->w_folios[i]);
  				mlog_errno(ret);
+				wc->w_folios[i] = NULL;
  				goto out;
  			}