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ocfs2: fix panic in failed foilio allocation

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commit 7e119cff9d ("ocfs2: convert w_pages to w_folios") and commit
9a5e08652d ("ocfs2: use an array of folios instead of an array of
pages") save -ENOMEM in the folio array upon allocation failure and call
the folio array free code.

The folio array free code expects either valid folio pointers or NULL. 
Finding the -ENOMEM will result in a panic.  Fix by NULLing the error
folio entry.

Link: https://lkml.kernel.org/r/c879a52b-835c-4fa0-902b-8b2e9196dcbd@oracle.com
Fixes: 7e119cff9d ("ocfs2: convert w_pages to w_folios")
Fixes: 9a5e08652d ("ocfs2: use an array of folios instead of an array of pages")
Signed-off-by: Mark Tinguely <mark.tinguely@oracle.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Mark Tinguely 2025-04-11 11:31:24 -05:00 committed by Andrew Morton
parent be6e843fc5
commit 31d4cd4eb2
1 changed files with 1 additions and 0 deletions
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1
fs/ocfs2/alloc.c
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@ -6918,6 +6918,7 @@ static int ocfs2_grab_folios(struct inode *inode, loff_t start, loff_t end,
if (IS_ERR(folios[numfolios])) { if (IS_ERR(folios[numfolios])) {
ret = PTR_ERR(folios[numfolios]); ret = PTR_ERR(folios[numfolios]);
mlog_errno(ret); mlog_errno(ret);
folios[numfolios] = NULL;
goto out; goto out;
} }