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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Sasha Levin <sashal@kernel.org>, Jaegeuk Kim <jaegeuk@kernel.org>,
	linux-f2fs-devel@lists.sourceforge.net
Subject: [f2fs-dev] [PATCH AUTOSEL 4.19 536/671] f2fs: fix wrong error injection path in inc_valid_block_count()
Date: Thu, 16 Jan 2020 12:02:54 -0500
Message-ID: <20200116170509.12787-273-sashal@kernel.org> (raw)
In-Reply-To: <20200116170509.12787-1-sashal@kernel.org>

From: Chao Yu <yuchao0@huawei.com>

[ Upstream commit 9ea2f0be6ceaebae1518a5f897cff2645830dd95 ]

If FAULT_BLOCK type error injection is on, in inc_valid_block_count()
we may decrease sbi->alloc_valid_block_count percpu stat count
incorrectly, fix it.

Fixes: 36b877af7992 ("f2fs: Keep alloc_valid_block_count in sync")
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/f2fs/f2fs.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 72d154e71bb5..6b5b685af599 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1701,7 +1701,7 @@ static inline int inc_valid_block_count(struct f2fs_sb_info *sbi,
 	if (time_to_inject(sbi, FAULT_BLOCK)) {
 		f2fs_show_injection_info(FAULT_BLOCK);
 		release = *count;
-		goto enospc;
+		goto release_quota;
 	}
 
 	/*
@@ -1741,6 +1741,7 @@ static inline int inc_valid_block_count(struct f2fs_sb_info *sbi,
 
 enospc:
 	percpu_counter_sub(&sbi->alloc_valid_block_count, release);
+release_quota:
 	dquot_release_reservation_block(inode, release);
 	return -ENOSPC;
 }
-- 
2.20.1



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Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20200116170509.12787-1-sashal@kernel.org>
2020-01-16 17:02 ` Sasha Levin [this message]
2020-01-16 17:02 ` [f2fs-dev] [PATCH AUTOSEL 4.19 537/671] f2fs: fix error path of f2fs_convert_inline_page() Sasha Levin
2020-01-16 17:03 ` [f2fs-dev] [PATCH AUTOSEL 4.19 554/671] f2fs: fix to avoid accessing uninitialized field of inode page in is_alive() Sasha Levin
2020-01-16 17:04 ` [f2fs-dev] [PATCH AUTOSEL 4.19 639/671] f2fs: fix potential overflow Sasha Levin

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