Filesystem with inlinedata will be remounted with read only mode as
follow steps:
1.mkdir tmp
2.cd tmp
3.mkdir a12345 a23456 a34567 a45678 a67890 a78901
4.reboot
5.cd tmp
6.mv a23456 a23456aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
The bug happened in ext4_rename()
3122 if (le32_to_cpu(old_de->inode) != old_inode->i_ino ||
3123 old_de->name_len != old_dentry->d_name.len ||
3124 strncmp(old_de->name, old_dentry->d_name.name,
old_de->name_len) ||
3125 (retval = ext4_delete_entry(handle, old_dir,
3126 old_de, old_bh)) == -ENOENT)
ext4_delete_entry-> ext4_generic_delete_entry-> ext4_check_dir_entry()
find the inode number is illegal and the system is remounted with
read only mode.
When the inlinedata is cleared in
ext4_destroy_inline_data_nolock(),ext4_inode->i_block[] is set to 0,
but ext4_inode->i_block[] is assigned as ext4_inode_info->i_block[] in
ext4_mark_iloc_dirty().Therefore, the inlinedata still exist in
ext4_inode->i_block[] and result in ext4_delete_entry() in line 3125
is executed.
>From d0e24fc2c0817fafe816b510060c711e56b6b645 Mon Sep 17 00:00:00 2001
From: qbx <[email protected]>
Date: Tue, 8 Oct 2013 07:04:13 -0700
Subject: [PATCH] inlinedata rename bug
---
fs/ext4/inline.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index d9ecbf1..cc6375e 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -434,6 +434,7 @@ static int ext4_destroy_inline_data_nolock(handle_t *handle,
memset((void *)ext4_raw_inode(&is.iloc)->i_block,
0, EXT4_MIN_INLINE_DATA_SIZE);
+ memset(ei->i_data,0, sizeof(ei->i_data));
if (EXT4_HAS_INCOMPAT_FEATURE(inode->i_sb,
EXT4_FEATURE_INCOMPAT_EXTENTS)) {
--
1.7.9.4
On Tue, Oct 08, 2013 at 11:32:05PM +0800, baixing quan wrote:
> Filesystem with inlinedata will be remounted with read only mode as
> follow steps:
>
> 1.mkdir tmp
> 2.cd tmp
> 3.mkdir a12345 a23456 a34567 a45678 a67890 a78901
> 4.reboot
> 5.cd tmp
> 6.mv a23456 a23456aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
>
> The bug happened in ext4_rename()
> 3122 if (le32_to_cpu(old_de->inode) != old_inode->i_ino ||
> 3123 old_de->name_len != old_dentry->d_name.len ||
> 3124 strncmp(old_de->name, old_dentry->d_name.name,
> old_de->name_len) ||
> 3125 (retval = ext4_delete_entry(handle, old_dir,
> 3126 old_de, old_bh)) == -ENOENT)
>
> ext4_delete_entry-> ext4_generic_delete_entry-> ext4_check_dir_entry()
> find the inode number is illegal and the system is remounted with
> read only mode.
>
> When the inlinedata is cleared in
> ext4_destroy_inline_data_nolock(),ext4_inode->i_block[] is set to 0,
> but ext4_inode->i_block[] is assigned as ext4_inode_info->i_block[] in
> ext4_mark_iloc_dirty().Therefore, the inlinedata still exist in
> ext4_inode->i_block[] and result in ext4_delete_entry() in line 3125
> is executed.
>
>
> From d0e24fc2c0817fafe816b510060c711e56b6b645 Mon Sep 17 00:00:00 2001
> From: qbx <[email protected]>
> Date: Tue, 8 Oct 2013 07:04:13 -0700
> Subject: [PATCH] inlinedata rename bug
>
> ---
> fs/ext4/inline.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
> index d9ecbf1..cc6375e 100644
> --- a/fs/ext4/inline.c
> +++ b/fs/ext4/inline.c
> @@ -434,6 +434,7 @@ static int ext4_destroy_inline_data_nolock(handle_t *handle,
>
> memset((void *)ext4_raw_inode(&is.iloc)->i_block,
> 0, EXT4_MIN_INLINE_DATA_SIZE);
> + memset(ei->i_data,0, sizeof(ei->i_data));
>
> if (EXT4_HAS_INCOMPAT_FEATURE(inode->i_sb,
> EXT4_FEATURE_INCOMPAT_EXTENTS)) {
Could you please run this through scripts/checkpatch.pl and fix the complaints?
There's at least whitespace issues and a missing Signed-off-by.
--D
> --
> 1.7.9.4
> --
> To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
> the body of a message to [email protected]
> More majordomo info at http://vger.kernel.org/majordomo-info.html
On 10/08/2013 11:32 PM, baixing quan wrote:
> Filesystem with inlinedata will be remounted with read only mode as
> follow steps:
>
> 1.mkdir tmp
> 2.cd tmp
> 3.mkdir a12345 a23456 a34567 a45678 a67890 a78901
> 4.reboot
> 5.cd tmp
> 6.mv a23456 a23456aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
>
> The bug happened in ext4_rename()
> 3122 if (le32_to_cpu(old_de->inode) != old_inode->i_ino ||
> 3123 old_de->name_len != old_dentry->d_name.len ||
> 3124 strncmp(old_de->name, old_dentry->d_name.name,
> old_de->name_len) ||
> 3125 (retval = ext4_delete_entry(handle, old_dir,
> 3126 old_de, old_bh)) == -ENOENT)
>
> ext4_delete_entry-> ext4_generic_delete_entry-> ext4_check_dir_entry()
> find the inode number is illegal and the system is remounted with
> read only mode.
>
> When the inlinedata is cleared in
> ext4_destroy_inline_data_nolock(),ext4_inode->i_block[] is set to 0,
> but ext4_inode->i_block[] is assigned as ext4_inode_info->i_block[] in
> ext4_mark_iloc_dirty().Therefore, the inlinedata still exist in
> ext4_inode->i_block[] and result in ext4_delete_entry() in line 3125
> is executed.
oh, thanks for the detailed explanation, soo the patch looks good to me.
But would you mind try what Darrick suggest? A good reference book
should be Documentation/SubmittingPatches.
Thanks,
Tao
>
>
> From d0e24fc2c0817fafe816b510060c711e56b6b645 Mon Sep 17 00:00:00 2001
> From: qbx <[email protected]>
> Date: Tue, 8 Oct 2013 07:04:13 -0700
> Subject: [PATCH] inlinedata rename bug
>
> ---
> fs/ext4/inline.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
> index d9ecbf1..cc6375e 100644
> --- a/fs/ext4/inline.c
> +++ b/fs/ext4/inline.c
> @@ -434,6 +434,7 @@ static int ext4_destroy_inline_data_nolock(handle_t *handle,
>
> memset((void *)ext4_raw_inode(&is.iloc)->i_block,
> 0, EXT4_MIN_INLINE_DATA_SIZE);
> + memset(ei->i_data,0, sizeof(ei->i_data));
>
> if (EXT4_HAS_INCOMPAT_FEATURE(inode->i_sb,
> EXT4_FEATURE_INCOMPAT_EXTENTS)) {
>
Signed-off-by: Baixing Quan <[email protected]>
---
fs/ext4/inline.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index d9ecbf1..cc6375e 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -434,6 +434,7 @@ static int ext4_destroy_inline_data_nolock(handle_t *handle,
memset((void *)ext4_raw_inode(&is.iloc)->i_block,
0, EXT4_MIN_INLINE_DATA_SIZE);
+ memset(ei->i_data, 0, sizeof(ei->i_data));
if (EXT4_HAS_INCOMPAT_FEATURE(inode->i_sb,
EXT4_FEATURE_INCOMPAT_EXTENTS)) {
--
1.7.9.4
2013/10/9 Tao Ma <[email protected]>:
> On 10/08/2013 11:32 PM, baixing quan wrote:
>> Filesystem with inlinedata will be remounted with read only mode as
>> follow steps:
>>
>> 1.mkdir tmp
>> 2.cd tmp
>> 3.mkdir a12345 a23456 a34567 a45678 a67890 a78901
>> 4.reboot
>> 5.cd tmp
>> 6.mv a23456 a23456aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
>>
>> The bug happened in ext4_rename()
>> 3122 if (le32_to_cpu(old_de->inode) != old_inode->i_ino ||
>> 3123 old_de->name_len != old_dentry->d_name.len ||
>> 3124 strncmp(old_de->name, old_dentry->d_name.name,
>> old_de->name_len) ||
>> 3125 (retval = ext4_delete_entry(handle, old_dir,
>> 3126 old_de, old_bh)) == -ENOENT)
>>
>> ext4_delete_entry-> ext4_generic_delete_entry-> ext4_check_dir_entry()
>> find the inode number is illegal and the system is remounted with
>> read only mode.
>>
>> When the inlinedata is cleared in
>> ext4_destroy_inline_data_nolock(),ext4_inode->i_block[] is set to 0,
>> but ext4_inode->i_block[] is assigned as ext4_inode_info->i_block[] in
>> ext4_mark_iloc_dirty().Therefore, the inlinedata still exist in
>> ext4_inode->i_block[] and result in ext4_delete_entry() in line 3125
>> is executed.
> oh, thanks for the detailed explanation, soo the patch looks good to me.
> But would you mind try what Darrick suggest? A good reference book
> should be Documentation/SubmittingPatches.
>
> Thanks,
> Tao
>>
>>
>> From d0e24fc2c0817fafe816b510060c711e56b6b645 Mon Sep 17 00:00:00 2001
>> From: qbx <[email protected]>
>> Date: Tue, 8 Oct 2013 07:04:13 -0700
>> Subject: [PATCH] inlinedata rename bug
>>
>> ---
>> fs/ext4/inline.c | 1 +
>> 1 file changed, 1 insertion(+)
>>
>> diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
>> index d9ecbf1..cc6375e 100644
>> --- a/fs/ext4/inline.c
>> +++ b/fs/ext4/inline.c
>> @@ -434,6 +434,7 @@ static int ext4_destroy_inline_data_nolock(handle_t *handle,
>>
>> memset((void *)ext4_raw_inode(&is.iloc)->i_block,
>> 0, EXT4_MIN_INLINE_DATA_SIZE);
>> + memset(ei->i_data,0, sizeof(ei->i_data));
>>
>> if (EXT4_HAS_INCOMPAT_FEATURE(inode->i_sb,
>> EXT4_FEATURE_INCOMPAT_EXTENTS)) {
>>
>