[PATCH v5 07/17] dax: remove the last BUG_ON() from fs/dax.c

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From: Ross Zwisler <ross.zwisler@linux.intel.com>
To: linux-kernel@vger.kernel.org
Cc: Theodore Ts'o <tytso@mit.edu>,
	Matthew Wilcox <mawilcox@microsoft.com>,
	Dave Chinner <david@fromorbit.com>,
	linux-nvdimm@lists.01.org, Christoph Hellwig <hch@lst.de>,
	linux-xfs@vger.kernel.org, linux-mm@kvack.org,
	Andreas Dilger <adilger.kernel@dilger.ca>,
	Alexander Viro <viro@zeniv.linux.org.uk>,
	Jan Kara <jack@suse.com>,
	linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org,
	Andrew Morton <akpm@linux-foundation.org>
Subject: [PATCH v5 07/17] dax: remove the last BUG_ON() from fs/dax.c
Date: Fri,  7 Oct 2016 15:08:54 -0600	[thread overview]
Message-ID: <1475874544-24842-8-git-send-email-ross.zwisler@linux.intel.com> (raw)
In-Reply-To: <1475874544-24842-1-git-send-email-ross.zwisler@linux.intel.com>

Don't take down the kernel if we get an invalid 'from' and 'length'
argument pair.  Just warn once and return an error.

Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
---
 fs/dax.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/dax.c b/fs/dax.c
index ac28cdf..98189ac 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1194,7 +1194,8 @@ int dax_zero_page_range(struct inode *inode, loff_t from, unsigned length,
 	/* Block boundary? Nothing to do */
 	if (!length)
 		return 0;
-	BUG_ON((offset + length) > PAGE_SIZE);
+	if (WARN_ON_ONCE((offset + length) > PAGE_SIZE))
+		return -EINVAL;
 
 	memset(&bh, 0, sizeof(bh));
 	bh.b_bdev = inode->i_sb->s_bdev;
-- 
2.7.4

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WARNING: multiple messages have this Message-ID (diff)

From: Ross Zwisler <ross.zwisler@linux.intel.com>
To: linux-kernel@vger.kernel.org
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>,
	"Theodore Ts'o" <tytso@mit.edu>,
	Alexander Viro <viro@zeniv.linux.org.uk>,
	Andreas Dilger <adilger.kernel@dilger.ca>,
	Andrew Morton <akpm@linux-foundation.org>,
	Christoph Hellwig <hch@lst.de>,
	Dan Williams <dan.j.williams@intel.com>,
	Dave Chinner <david@fromorbit.com>, Jan Kara <jack@suse.com>,
	Matthew Wilcox <mawilcox@microsoft.com>,
	linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-mm@kvack.org, linux-nvdimm@ml01.01.org,
	linux-xfs@vger.kernel.org
Subject: [PATCH v5 07/17] dax: remove the last BUG_ON() from fs/dax.c
Date: Fri,  7 Oct 2016 15:08:54 -0600	[thread overview]
Message-ID: <1475874544-24842-8-git-send-email-ross.zwisler@linux.intel.com> (raw)
In-Reply-To: <1475874544-24842-1-git-send-email-ross.zwisler@linux.intel.com>

Don't take down the kernel if we get an invalid 'from' and 'length'
argument pair.  Just warn once and return an error.

Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
---
 fs/dax.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/dax.c b/fs/dax.c
index ac28cdf..98189ac 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1194,7 +1194,8 @@ int dax_zero_page_range(struct inode *inode, loff_t from, unsigned length,
 	/* Block boundary? Nothing to do */
 	if (!length)
 		return 0;
-	BUG_ON((offset + length) > PAGE_SIZE);
+	if (WARN_ON_ONCE((offset + length) > PAGE_SIZE))
+		return -EINVAL;
 
 	memset(&bh, 0, sizeof(bh));
 	bh.b_bdev = inode->i_sb->s_bdev;
-- 
2.7.4

WARNING: multiple messages have this Message-ID (diff)

From: Ross Zwisler <ross.zwisler@linux.intel.com>
To: linux-kernel@vger.kernel.org
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>,
	"Theodore Ts'o" <tytso@mit.edu>,
	Alexander Viro <viro@zeniv.linux.org.uk>,
	Andreas Dilger <adilger.kernel@dilger.ca>,
	Andrew Morton <akpm@linux-foundation.org>,
	Christoph Hellwig <hch@lst.de>,
	Dan Williams <dan.j.williams@intel.com>,
	Dave Chinner <david@fromorbit.com>, Jan Kara <jack@suse.com>,
	Matthew Wilcox <mawilcox@microsoft.com>,
	linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-mm@kvack.org, linux-nvdimm@lists.01.org,
	linux-xfs@vger.kernel.org
Subject: [PATCH v5 07/17] dax: remove the last BUG_ON() from fs/dax.c
Date: Fri,  7 Oct 2016 15:08:54 -0600	[thread overview]
Message-ID: <1475874544-24842-8-git-send-email-ross.zwisler@linux.intel.com> (raw)
In-Reply-To: <1475874544-24842-1-git-send-email-ross.zwisler@linux.intel.com>

Don't take down the kernel if we get an invalid 'from' and 'length'
argument pair.  Just warn once and return an error.

Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
---
 fs/dax.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/dax.c b/fs/dax.c
index ac28cdf..98189ac 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1194,7 +1194,8 @@ int dax_zero_page_range(struct inode *inode, loff_t from, unsigned length,
 	/* Block boundary? Nothing to do */
 	if (!length)
 		return 0;
-	BUG_ON((offset + length) > PAGE_SIZE);
+	if (WARN_ON_ONCE((offset + length) > PAGE_SIZE))
+		return -EINVAL;
 
 	memset(&bh, 0, sizeof(bh));
 	bh.b_bdev = inode->i_sb->s_bdev;
-- 
2.7.4

WARNING: multiple messages have this Message-ID (diff)

From: Ross Zwisler <ross.zwisler-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
To: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: Theodore Ts'o <tytso-3s7WtUTddSA@public.gmane.org>,
	Matthew Wilcox <mawilcox-0li6OtcxBFHby3iVrkZq2A@public.gmane.org>,
	Dave Chinner <david-FqsqvQoI3Ljby3iVrkZq2A@public.gmane.org>,
	linux-nvdimm-hn68Rpc1hR1g9hUCZPvPmw@public.gmane.org,
	Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>,
	linux-xfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org,
	Andreas Dilger
	<adilger.kernel-m1MBpc4rdrD3fQ9qLvQP4Q@public.gmane.org>,
	Alexander Viro
	<viro-RmSDqhL/yNMiFSDQTTA3OLVCufUGDwFn@public.gmane.org>,
	Jan Kara <jack-IBi9RG/b67k@public.gmane.org>,
	linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-ext4-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Andrew Morton
	<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
Subject: [PATCH v5 07/17] dax: remove the last BUG_ON() from fs/dax.c
Date: Fri,  7 Oct 2016 15:08:54 -0600	[thread overview]
Message-ID: <1475874544-24842-8-git-send-email-ross.zwisler@linux.intel.com> (raw)
In-Reply-To: <1475874544-24842-1-git-send-email-ross.zwisler-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>

Don't take down the kernel if we get an invalid 'from' and 'length'
argument pair.  Just warn once and return an error.

Signed-off-by: Ross Zwisler <ross.zwisler-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
---
 fs/dax.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/dax.c b/fs/dax.c
index ac28cdf..98189ac 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1194,7 +1194,8 @@ int dax_zero_page_range(struct inode *inode, loff_t from, unsigned length,
 	/* Block boundary? Nothing to do */
 	if (!length)
 		return 0;
-	BUG_ON((offset + length) > PAGE_SIZE);
+	if (WARN_ON_ONCE((offset + length) > PAGE_SIZE))
+		return -EINVAL;
 
 	memset(&bh, 0, sizeof(bh));
 	bh.b_bdev = inode->i_sb->s_bdev;
-- 
2.7.4

WARNING: multiple messages have this Message-ID (diff)

From: Ross Zwisler <ross.zwisler@linux.intel.com>
To: linux-kernel@vger.kernel.org
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>,
	Theodore Ts'o <tytso@mit.edu>,
	Alexander Viro <viro@zeniv.linux.org.uk>,
	Andreas Dilger <adilger.kernel@dilger.ca>,
	Andrew Morton <akpm@linux-foundation.org>,
	Christoph Hellwig <hch@lst.de>,
	Dan Williams <dan.j.williams@intel.com>,
	Dave Chinner <david@fromorbit.com>, Jan Kara <jack@suse.com>,
	Matthew Wilcox <mawilcox@microsoft.com>,
	linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-mm@kvack.org, linux-nvdimm@lists.01.org,
	linux-xfs@vger.kernel.org
Subject: [PATCH v5 07/17] dax: remove the last BUG_ON() from fs/dax.c
Date: Fri,  7 Oct 2016 15:08:54 -0600	[thread overview]
Message-ID: <1475874544-24842-8-git-send-email-ross.zwisler@linux.intel.com> (raw)
In-Reply-To: <1475874544-24842-1-git-send-email-ross.zwisler@linux.intel.com>

Don't take down the kernel if we get an invalid 'from' and 'length'
argument pair.  Just warn once and return an error.

Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
---
 fs/dax.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/dax.c b/fs/dax.c
index ac28cdf..98189ac 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1194,7 +1194,8 @@ int dax_zero_page_range(struct inode *inode, loff_t from, unsigned length,
 	/* Block boundary? Nothing to do */
 	if (!length)
 		return 0;
-	BUG_ON((offset + length) > PAGE_SIZE);
+	if (WARN_ON_ONCE((offset + length) > PAGE_SIZE))
+		return -EINVAL;
 
 	memset(&bh, 0, sizeof(bh));
 	bh.b_bdev = inode->i_sb->s_bdev;
-- 
2.7.4

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next prev parent reply	other threads:[~2016-10-07 21:09 UTC|newest]

Thread overview: 182+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-10-07 21:08 [PATCH v5 00/17] re-enable DAX PMD support Ross Zwisler
2016-10-07 21:08 ` Ross Zwisler
2016-10-07 21:08 ` Ross Zwisler
2016-10-07 21:08 ` Ross Zwisler
2016-10-07 21:08 ` [PATCH v5 01/17] ext4: allow DAX writeback for hole punch Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08 ` [PATCH v5 02/17] ext4: tell DAX the size of allocation holes Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08 ` [PATCH v5 03/17] dax: remove buffer_size_valid() Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08 ` [PATCH v5 04/17] ext2: remove support for DAX PMD faults Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08 ` [PATCH v5 05/17] ext2: return -EIO on ext2_iomap_end() failure Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-11  6:48   ` Jan Kara
2016-10-11  6:48     ` Jan Kara
2016-10-11  6:48     ` Jan Kara
2016-10-11  6:48     ` Jan Kara
2016-10-07 21:08 ` [PATCH v5 06/17] dax: make 'wait_table' global variable static Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08 ` Ross Zwisler [this message]
2016-10-07 21:08   ` [PATCH v5 07/17] dax: remove the last BUG_ON() from fs/dax.c Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-10 15:45   ` Christoph Hellwig
2016-10-10 15:45     ` Christoph Hellwig
2016-10-10 15:45     ` Christoph Hellwig
2016-10-10 15:45     ` Christoph Hellwig
2016-10-10 15:45     ` Christoph Hellwig
2016-10-11  6:50   ` Jan Kara
2016-10-11  6:50     ` Jan Kara
2016-10-11  6:50     ` Jan Kara
2016-10-11  6:50     ` Jan Kara
2016-10-11  6:50     ` Jan Kara
2016-10-07 21:08 ` [PATCH v5 08/17] dax: consistent variable naming for DAX entries Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08 ` [PATCH v5 09/17] dax: coordinate locking for offsets in PMD range Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-10 15:46   ` Christoph Hellwig
2016-10-10 15:46     ` Christoph Hellwig
2016-10-10 15:46     ` Christoph Hellwig
2016-10-11  7:04   ` Jan Kara
2016-10-11  7:04     ` Jan Kara
2016-10-11  7:04     ` Jan Kara
2016-10-11  7:04     ` Jan Kara
2016-10-11 21:18     ` Ross Zwisler
2016-10-11 21:18       ` Ross Zwisler
2016-10-11 21:18       ` Ross Zwisler
2016-10-07 21:08 ` [PATCH v5 10/17] dax: remove dax_pmd_fault() Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08 ` [PATCH v5 11/17] dax: correct dax iomap code namespace Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-09 15:28   ` Christoph Hellwig
2016-10-09 15:28     ` Christoph Hellwig
2016-10-09 15:28     ` Christoph Hellwig
2016-10-09 15:28     ` Christoph Hellwig
2016-10-10 19:04     ` [PATCH] " Ross Zwisler
2016-10-10 19:04       ` Ross Zwisler
2016-10-10 19:04       ` Ross Zwisler
2016-10-10 19:04       ` Ross Zwisler
2016-10-10 20:19       ` Dave Chinner
2016-10-10 20:19         ` Dave Chinner
2016-10-10 20:19         ` Dave Chinner
2016-10-10 20:19         ` Dave Chinner
2016-10-07 21:08 ` [PATCH v5 12/17] dax: add dax_iomap_sector() helper function Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-07 21:08   ` Ross Zwisler
2016-10-10 15:46   ` Christoph Hellwig
2016-10-10 15:46     ` Christoph Hellwig
2016-10-10 15:46     ` Christoph Hellwig
2016-10-10 15:46     ` Christoph Hellwig
2016-10-10 15:46     ` Christoph Hellwig
2016-10-11  7:06   ` Jan Kara
2016-10-11  7:06     ` Jan Kara
2016-10-11  7:06     ` Jan Kara
2016-10-11  7:06     ` Jan Kara
2016-10-07 21:09 ` [PATCH v5 13/17] dax: dax_iomap_fault() needs to call iomap_end() Ross Zwisler
2016-10-07 21:09   ` Ross Zwisler
2016-10-07 21:09   ` Ross Zwisler
2016-10-07 21:09   ` Ross Zwisler
2016-10-10 15:50   ` Christoph Hellwig
2016-10-10 15:50     ` Christoph Hellwig
2016-10-10 15:50     ` Christoph Hellwig
2016-10-10 15:50     ` Christoph Hellwig
2016-10-10 22:05     ` Ross Zwisler
2016-10-10 22:05       ` Ross Zwisler
2016-10-10 22:05       ` Ross Zwisler
2016-10-10 22:05       ` Ross Zwisler
2016-10-11  7:21   ` Jan Kara
2016-10-11  7:21     ` Jan Kara
2016-10-11  7:21     ` Jan Kara
2016-10-11  7:21     ` Jan Kara
2016-10-11  7:21     ` Jan Kara
2016-10-07 21:09 ` [PATCH v5 14/17] dax: move RADIX_DAX_* defines to dax.h Ross Zwisler
2016-10-07 21:09   ` Ross Zwisler
2016-10-07 21:09   ` Ross Zwisler
2016-10-07 21:09   ` Ross Zwisler
2016-10-10 15:50   ` Christoph Hellwig
2016-10-10 15:50     ` Christoph Hellwig
2016-10-10 15:50     ` Christoph Hellwig
2016-10-10 15:50     ` Christoph Hellwig
2016-10-10 15:50     ` Christoph Hellwig
2016-10-11  7:23   ` Jan Kara
2016-10-11  7:23     ` Jan Kara
2016-10-11  7:23     ` Jan Kara
2016-10-11  7:23     ` Jan Kara
2016-10-11  7:23     ` Jan Kara
2016-10-07 21:09 ` [PATCH v5 15/17] dax: add struct iomap based DAX PMD support Ross Zwisler
2016-10-07 21:09   ` Ross Zwisler
2016-10-07 21:09   ` Ross Zwisler
2016-10-07 21:09   ` Ross Zwisler
2016-10-07 21:09   ` Ross Zwisler
2016-10-10 15:59   ` Christoph Hellwig
2016-10-10 15:59     ` Christoph Hellwig
2016-10-10 15:59     ` Christoph Hellwig
2016-10-10 15:59     ` Christoph Hellwig
2016-10-10 22:06     ` Ross Zwisler
2016-10-10 22:06       ` Ross Zwisler
2016-10-10 22:06       ` Ross Zwisler
2016-10-10 22:06       ` Ross Zwisler
2016-10-10 22:06       ` Ross Zwisler
2016-10-11 21:48     ` Ross Zwisler
2016-10-11 21:48       ` Ross Zwisler
2016-10-11 21:48       ` Ross Zwisler
2016-10-11 21:48       ` Ross Zwisler
2016-10-11 21:48       ` Ross Zwisler
2016-10-11  8:31   ` Jan Kara
2016-10-11  8:31     ` Jan Kara
2016-10-11  8:31     ` Jan Kara
2016-10-11  8:31     ` Jan Kara
2016-10-11  8:31     ` Jan Kara
2016-10-11 22:51     ` Ross Zwisler
2016-10-11 22:51       ` Ross Zwisler
2016-10-11 22:51       ` Ross Zwisler
2016-10-11 22:51       ` Ross Zwisler
2016-10-11 22:51       ` Ross Zwisler
2016-10-12  7:45       ` Jan Kara
2016-10-12  7:45         ` Jan Kara
2016-10-12  7:45         ` Jan Kara
2016-10-07 21:09 ` [PATCH v5 16/17] xfs: use struct iomap based DAX PMD fault path Ross Zwisler
2016-10-07 21:09   ` Ross Zwisler
2016-10-07 21:09   ` Ross Zwisler
2016-10-07 21:09   ` Ross Zwisler
2016-10-11  8:34   ` Jan Kara
2016-10-11  8:34     ` Jan Kara
2016-10-11  8:34     ` Jan Kara
2016-10-11  8:34     ` Jan Kara
2016-10-07 21:09 ` [PATCH v5 17/17] dax: remove "depends on BROKEN" from FS_DAX_PMD Ross Zwisler
2016-10-07 21:09   ` Ross Zwisler
2016-10-07 21:09   ` Ross Zwisler
2016-10-07 21:09   ` Ross Zwisler
2016-10-07 21:09   ` Ross Zwisler

find likely ancestor, descendant, or conflicting patches for this message:
dfblob:ac28cdf dfblob:ac28cdf dfblob:ac28cdf dfblob:ac28cdf
dfblob:ac28cdf dfblob:98189ac dfblob:98189ac dfblob:98189ac
dfblob:98189ac dfblob:98189ac
	(help)

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