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Message-ID: <20211130104043.GB5827@kili>
Date: Tue, 30 Nov 2021 13:40:43 +0300
From: Dan Carpenter <dan.carpenter@...cle.com>
To: Mark Fasheh <mark@...heh.com>,
Wengang Wang <wen.gang.wang@...cle.com>
Cc: Joel Becker <jlbec@...lplan.org>,
Joseph Qi <joseph.qi@...ux.alibaba.com>,
Sunil Mushran <sunil.mushran@...cle.com>,
ocfs2-devel@....oracle.com, linux-kernel@...r.kernel.org,
kernel-janitors@...r.kernel.org
Subject: [PATCH] ocfs2: fix uninitialized variable in ocfs2_dio_wr_get_block()
The callers assume that "*fsdata" is set on the success path, but
that's not necessarily true on this path.
Fixes: 5cffff9e2986 ("ocfs2: Fix ocfs2_page_mkwrite()")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
Please review this one EXTRA CAREFULLY. It's from static analysis and
the truth is I'm not 100% sure it's correct. I'm also not sure that
it's a complete fix.
Especially, please review how this is called from ocfs2_write_begin()
to make sure that this doesn't break anything.
fs/ocfs2/aops.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index 68d11c295dd3..a74a370f16f0 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -1813,6 +1813,7 @@ int ocfs2_write_begin_nolock(struct address_space *mapping,
if (ret == -EAGAIN) {
BUG_ON(wc->w_target_page);
ret = 0;
+ *fsdata = wc;
goto out_quota;
}
--
2.20.1
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