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Date: Tue, 2 Mar 2010 15:51:02 +0300 From: Dmitry Monakhov <dmonakhov@...nvz.org> To: linux-ext4@...r.kernel.org Cc: jack@...e.cz, Dmitry Monakhov <dmonakhov@...nvz.org> Subject: [PATCH] ext3: add writepage sanity checks - There is theoretical possibility to perform writepage on RO superblock. Add explicit check for what case. - Page must being locked before writepage. Signed-off-by: Dmitry Monakhov <dmonakhov@...nvz.org> --- fs/ext3/inode.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-) diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c index 8ac4acf..14d40a4 100644 --- a/fs/ext3/inode.c +++ b/fs/ext3/inode.c @@ -1528,6 +1528,7 @@ static int ext3_ordered_writepage(struct page *page, int err; J_ASSERT(PageLocked(page)); + WARN_ON_ONCE(IS_RDONLY(inode)); /* * We give up here if we're reentered, because it might be for a @@ -1600,6 +1601,9 @@ static int ext3_writeback_writepage(struct page *page, int ret = 0; int err; + J_ASSERT(PageLocked(page)); + WARN_ON_ONCE(IS_RDONLY(inode)); + if (ext3_journal_current_handle()) goto out_fail; @@ -1642,6 +1646,9 @@ static int ext3_journalled_writepage(struct page *page, int ret = 0; int err; + J_ASSERT(PageLocked(page)); + WARN_ON_ONCE(IS_RDONLY(inode)); + if (ext3_journal_current_handle()) goto no_write; -- 1.6.6 -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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