* [f2fs-dev] [PATCH] f2fs: fix to disallow getting inner inode via f2fs_iget()
@ 2022-08-30 10:36 Chao Yu
2022-08-30 18:09 ` Jaegeuk Kim
0 siblings, 1 reply; 3+ messages in thread
From: Chao Yu @ 2022-08-30 10:36 UTC (permalink / raw)
To: jaegeuk; +Cc: linux-kernel, linux-f2fs-devel
From: Chao Yu <chao.yu@oppo.com>
Introduce f2fs_iget_inner() for f2fs_fill_super() to get inner inode:
meta inode, node inode or compressed inode, and add f2fs_check_nid_range()
in f2fs_iget() to avoid getting inner inode from external interfaces.
Signed-off-by: Chao Yu <chao.yu@oppo.com>
---
fs/f2fs/compress.c | 2 +-
fs/f2fs/f2fs.h | 1 +
fs/f2fs/inode.c | 10 +++++++++-
fs/f2fs/super.c | 4 ++--
4 files changed, 13 insertions(+), 4 deletions(-)
diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index 730256732a9e..c38b22bb6432 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -1947,7 +1947,7 @@ int f2fs_init_compress_inode(struct f2fs_sb_info *sbi)
if (!test_opt(sbi, COMPRESS_CACHE))
return 0;
- inode = f2fs_iget(sbi->sb, F2FS_COMPRESS_INO(sbi));
+ inode = f2fs_iget_inner(sbi->sb, F2FS_COMPRESS_INO(sbi));
if (IS_ERR(inode))
return PTR_ERR(inode);
sbi->compress_inode = inode;
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 408d8034ed74..35f9e1a6a1bf 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -3467,6 +3467,7 @@ int f2fs_pin_file_control(struct inode *inode, bool inc);
void f2fs_set_inode_flags(struct inode *inode);
bool f2fs_inode_chksum_verify(struct f2fs_sb_info *sbi, struct page *page);
void f2fs_inode_chksum_set(struct f2fs_sb_info *sbi, struct page *page);
+struct inode *f2fs_iget_inner(struct super_block *sb, unsigned long ino);
struct inode *f2fs_iget(struct super_block *sb, unsigned long ino);
struct inode *f2fs_iget_retry(struct super_block *sb, unsigned long ino);
int f2fs_try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink);
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index 6d11c365d7b4..0ab3ae9b2110 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -480,7 +480,7 @@ static int do_read_inode(struct inode *inode)
return 0;
}
-struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
+struct inode *f2fs_iget_inner(struct super_block *sb, unsigned long ino)
{
struct f2fs_sb_info *sbi = F2FS_SB(sb);
struct inode *inode;
@@ -568,6 +568,14 @@ struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
return ERR_PTR(ret);
}
+struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
+{
+ if (f2fs_check_nid_range(F2FS_SB(sb), ino))
+ return -EINVAL;
+
+ return f2fs_iget_inner(sb, ino);
+}
+
struct inode *f2fs_iget_retry(struct super_block *sb, unsigned long ino)
{
struct inode *inode;
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index b8e5fe244596..a5f5e7483791 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -4157,7 +4157,7 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
goto free_xattr_cache;
/* get an inode for meta space */
- sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
+ sbi->meta_inode = f2fs_iget_inner(sb, F2FS_META_INO(sbi));
if (IS_ERR(sbi->meta_inode)) {
f2fs_err(sbi, "Failed to read F2FS meta data inode");
err = PTR_ERR(sbi->meta_inode);
@@ -4265,7 +4265,7 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
goto free_nm;
/* get an inode for node space */
- sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
+ sbi->node_inode = f2fs_iget_inner(sb, F2FS_NODE_INO(sbi));
if (IS_ERR(sbi->node_inode)) {
f2fs_err(sbi, "Failed to read node inode");
err = PTR_ERR(sbi->node_inode);
--
2.25.1
_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [f2fs-dev] [PATCH] f2fs: fix to disallow getting inner inode via f2fs_iget()
2022-08-30 10:36 [f2fs-dev] [PATCH] f2fs: fix to disallow getting inner inode via f2fs_iget() Chao Yu
@ 2022-08-30 18:09 ` Jaegeuk Kim
2022-08-30 22:44 ` Chao Yu
0 siblings, 1 reply; 3+ messages in thread
From: Jaegeuk Kim @ 2022-08-30 18:09 UTC (permalink / raw)
To: Chao Yu; +Cc: linux-kernel, linux-f2fs-devel
On 08/30, Chao Yu wrote:
> From: Chao Yu <chao.yu@oppo.com>
>
> Introduce f2fs_iget_inner() for f2fs_fill_super() to get inner inode:
> meta inode, node inode or compressed inode, and add f2fs_check_nid_range()
> in f2fs_iget() to avoid getting inner inode from external interfaces.
>
> Signed-off-by: Chao Yu <chao.yu@oppo.com>
> ---
> fs/f2fs/compress.c | 2 +-
> fs/f2fs/f2fs.h | 1 +
> fs/f2fs/inode.c | 10 +++++++++-
> fs/f2fs/super.c | 4 ++--
> 4 files changed, 13 insertions(+), 4 deletions(-)
>
> diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
> index 730256732a9e..c38b22bb6432 100644
> --- a/fs/f2fs/compress.c
> +++ b/fs/f2fs/compress.c
> @@ -1947,7 +1947,7 @@ int f2fs_init_compress_inode(struct f2fs_sb_info *sbi)
> if (!test_opt(sbi, COMPRESS_CACHE))
> return 0;
>
> - inode = f2fs_iget(sbi->sb, F2FS_COMPRESS_INO(sbi));
> + inode = f2fs_iget_inner(sbi->sb, F2FS_COMPRESS_INO(sbi));
> if (IS_ERR(inode))
> return PTR_ERR(inode);
> sbi->compress_inode = inode;
> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> index 408d8034ed74..35f9e1a6a1bf 100644
> --- a/fs/f2fs/f2fs.h
> +++ b/fs/f2fs/f2fs.h
> @@ -3467,6 +3467,7 @@ int f2fs_pin_file_control(struct inode *inode, bool inc);
> void f2fs_set_inode_flags(struct inode *inode);
> bool f2fs_inode_chksum_verify(struct f2fs_sb_info *sbi, struct page *page);
> void f2fs_inode_chksum_set(struct f2fs_sb_info *sbi, struct page *page);
> +struct inode *f2fs_iget_inner(struct super_block *sb, unsigned long ino);
> struct inode *f2fs_iget(struct super_block *sb, unsigned long ino);
> struct inode *f2fs_iget_retry(struct super_block *sb, unsigned long ino);
> int f2fs_try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink);
> diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
> index 6d11c365d7b4..0ab3ae9b2110 100644
> --- a/fs/f2fs/inode.c
> +++ b/fs/f2fs/inode.c
> @@ -480,7 +480,7 @@ static int do_read_inode(struct inode *inode)
> return 0;
> }
>
> -struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
> +struct inode *f2fs_iget_inner(struct super_block *sb, unsigned long ino)
> {
> struct f2fs_sb_info *sbi = F2FS_SB(sb);
> struct inode *inode;
> @@ -568,6 +568,14 @@ struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
> return ERR_PTR(ret);
> }
>
> +struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
> +{
> + if (f2fs_check_nid_range(F2FS_SB(sb), ino))
> + return -EINVAL;
EINVAL or EFSCORRUPTED used in f2fs_check_nid_range?
Do we have a report on this before?
> +
> + return f2fs_iget_inner(sb, ino);
> +}
> +
> struct inode *f2fs_iget_retry(struct super_block *sb, unsigned long ino)
> {
> struct inode *inode;
> diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
> index b8e5fe244596..a5f5e7483791 100644
> --- a/fs/f2fs/super.c
> +++ b/fs/f2fs/super.c
> @@ -4157,7 +4157,7 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
> goto free_xattr_cache;
>
> /* get an inode for meta space */
> - sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
> + sbi->meta_inode = f2fs_iget_inner(sb, F2FS_META_INO(sbi));
> if (IS_ERR(sbi->meta_inode)) {
> f2fs_err(sbi, "Failed to read F2FS meta data inode");
> err = PTR_ERR(sbi->meta_inode);
> @@ -4265,7 +4265,7 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
> goto free_nm;
>
> /* get an inode for node space */
> - sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
> + sbi->node_inode = f2fs_iget_inner(sb, F2FS_NODE_INO(sbi));
> if (IS_ERR(sbi->node_inode)) {
> f2fs_err(sbi, "Failed to read node inode");
> err = PTR_ERR(sbi->node_inode);
> --
> 2.25.1
_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [f2fs-dev] [PATCH] f2fs: fix to disallow getting inner inode via f2fs_iget()
2022-08-30 18:09 ` Jaegeuk Kim
@ 2022-08-30 22:44 ` Chao Yu
0 siblings, 0 replies; 3+ messages in thread
From: Chao Yu @ 2022-08-30 22:44 UTC (permalink / raw)
To: Jaegeuk Kim; +Cc: linux-kernel, linux-f2fs-devel
On 2022/8/31 2:09, Jaegeuk Kim wrote:
> On 08/30, Chao Yu wrote:
>> From: Chao Yu <chao.yu@oppo.com>
>>
>> Introduce f2fs_iget_inner() for f2fs_fill_super() to get inner inode:
>> meta inode, node inode or compressed inode, and add f2fs_check_nid_range()
>> in f2fs_iget() to avoid getting inner inode from external interfaces.
>>
>> Signed-off-by: Chao Yu <chao.yu@oppo.com>
>> ---
>> fs/f2fs/compress.c | 2 +-
>> fs/f2fs/f2fs.h | 1 +
>> fs/f2fs/inode.c | 10 +++++++++-
>> fs/f2fs/super.c | 4 ++--
>> 4 files changed, 13 insertions(+), 4 deletions(-)
>>
>> diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
>> index 730256732a9e..c38b22bb6432 100644
>> --- a/fs/f2fs/compress.c
>> +++ b/fs/f2fs/compress.c
>> @@ -1947,7 +1947,7 @@ int f2fs_init_compress_inode(struct f2fs_sb_info *sbi)
>> if (!test_opt(sbi, COMPRESS_CACHE))
>> return 0;
>>
>> - inode = f2fs_iget(sbi->sb, F2FS_COMPRESS_INO(sbi));
>> + inode = f2fs_iget_inner(sbi->sb, F2FS_COMPRESS_INO(sbi));
>> if (IS_ERR(inode))
>> return PTR_ERR(inode);
>> sbi->compress_inode = inode;
>> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
>> index 408d8034ed74..35f9e1a6a1bf 100644
>> --- a/fs/f2fs/f2fs.h
>> +++ b/fs/f2fs/f2fs.h
>> @@ -3467,6 +3467,7 @@ int f2fs_pin_file_control(struct inode *inode, bool inc);
>> void f2fs_set_inode_flags(struct inode *inode);
>> bool f2fs_inode_chksum_verify(struct f2fs_sb_info *sbi, struct page *page);
>> void f2fs_inode_chksum_set(struct f2fs_sb_info *sbi, struct page *page);
>> +struct inode *f2fs_iget_inner(struct super_block *sb, unsigned long ino);
>> struct inode *f2fs_iget(struct super_block *sb, unsigned long ino);
>> struct inode *f2fs_iget_retry(struct super_block *sb, unsigned long ino);
>> int f2fs_try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink);
>> diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
>> index 6d11c365d7b4..0ab3ae9b2110 100644
>> --- a/fs/f2fs/inode.c
>> +++ b/fs/f2fs/inode.c
>> @@ -480,7 +480,7 @@ static int do_read_inode(struct inode *inode)
>> return 0;
>> }
>>
>> -struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
>> +struct inode *f2fs_iget_inner(struct super_block *sb, unsigned long ino)
>> {
>> struct f2fs_sb_info *sbi = F2FS_SB(sb);
>> struct inode *inode;
>> @@ -568,6 +568,14 @@ struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
>> return ERR_PTR(ret);
>> }
>>
>> +struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
>> +{
>> + if (f2fs_check_nid_range(F2FS_SB(sb), ino))
>> + return -EINVAL;
>
> EINVAL or EFSCORRUPTED used in f2fs_check_nid_range?
Oh, I guess returning EFSCORRUPTED will be better.
> Do we have a report on this before?
Not yet, but I guess it is possible in a fuzzed image like below paths, due to
we will not check ino before pass it to f2fs_iget(), and then f2fs_iget() will
find/return a hashed internal inode to caller, which should be avoided.
case #1
recover_dentry()
de = __f2fs_find_entry(dir, &fname, &page);
if (de && inode->i_ino == le32_to_cpu(de->ino))
goto out_put;
if (de) {
einode = f2fs_iget_retry(inode->i_sb, le32_to_cpu(de->ino));
if (IS_ERR(einode)) {
WARN_ON(1);
err = PTR_ERR(einode);
if (err == -ENOENT)
err = -EEXIST;
goto out_put;
}
case #2
static int recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
{
struct inode *inode;
struct node_info ni;
int err;
inode = f2fs_iget_retry(sbi->sb, ino);
Thanks,
>
>> +
>> + return f2fs_iget_inner(sb, ino);
>> +}
>> +
>> struct inode *f2fs_iget_retry(struct super_block *sb, unsigned long ino)
>> {
>> struct inode *inode;
>> diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
>> index b8e5fe244596..a5f5e7483791 100644
>> --- a/fs/f2fs/super.c
>> +++ b/fs/f2fs/super.c
>> @@ -4157,7 +4157,7 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
>> goto free_xattr_cache;
>>
>> /* get an inode for meta space */
>> - sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
>> + sbi->meta_inode = f2fs_iget_inner(sb, F2FS_META_INO(sbi));
>> if (IS_ERR(sbi->meta_inode)) {
>> f2fs_err(sbi, "Failed to read F2FS meta data inode");
>> err = PTR_ERR(sbi->meta_inode);
>> @@ -4265,7 +4265,7 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
>> goto free_nm;
>>
>> /* get an inode for node space */
>> - sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
>> + sbi->node_inode = f2fs_iget_inner(sb, F2FS_NODE_INO(sbi));
>> if (IS_ERR(sbi->node_inode)) {
>> f2fs_err(sbi, "Failed to read node inode");
>> err = PTR_ERR(sbi->node_inode);
>> --
>> 2.25.1
_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
^ permalink raw reply [flat|nested] 3+ messages in thread
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2022-08-30 10:36 [f2fs-dev] [PATCH] f2fs: fix to disallow getting inner inode via f2fs_iget() Chao Yu
2022-08-30 18:09 ` Jaegeuk Kim
2022-08-30 22:44 ` Chao Yu
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