2024-05-07 03:38:59

by Chao Yu

Subject: [PATCH v2] f2fs: check validation of fault attrs in f2fs_build_fault_attr()

- It missed to check validation of fault attrs in parse_options(),
let's fix to add check condition in f2fs_build_fault_attr().
- Use f2fs_build_fault_attr() in __sbi_store() to clean up code.

Signed-off-by: Chao Yu <[email protected]>
---
v2:
- add static for f2fs_build_fault_attr().
fs/f2fs/f2fs.h | 12 ++++++++----
fs/f2fs/super.c | 27 ++++++++++++++++++++-------
fs/f2fs/sysfs.c | 14 ++++++++++----
3 files changed, 38 insertions(+), 15 deletions(-)

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 95a40d4f778f..a29576f46796 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -72,7 +72,7 @@ enum {

struct f2fs_fault_info {
atomic_t inject_ops;
- unsigned int inject_rate;
+ int inject_rate;
unsigned int inject_type;
};

@@ -4597,10 +4597,14 @@ static inline bool f2fs_need_verity(const struct inode *inode, pgoff_t idx)
}

#ifdef CONFIG_F2FS_FAULT_INJECTION
-extern void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
- unsigned int type);
+extern int f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned long rate,
+ unsigned long type);
#else
-#define f2fs_build_fault_attr(sbi, rate, type) do { } while (0)
+static int f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned long rate,
+ unsigned long type)
+{
+ return 0;
+}
#endif

static inline bool is_journalled_quota(struct f2fs_sb_info *sbi)
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index a4bc26dfdb1a..94918ae7eddb 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -66,21 +66,31 @@ const char *f2fs_fault_name[FAULT_MAX] = {
[FAULT_NO_SEGMENT] = "no free segment",
};

-void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
- unsigned int type)
+int f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned long rate,
+ unsigned long type)
{
struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;

if (rate) {
+ if (rate > INT_MAX)
+ return -EINVAL;
atomic_set(&ffi->inject_ops, 0);
- ffi->inject_rate = rate;
+ ffi->inject_rate = (int)rate;
}

- if (type)
- ffi->inject_type = type;
+ if (type) {
+ if (type >= BIT(FAULT_MAX))
+ return -EINVAL;
+ ffi->inject_type = (unsigned int)type;
+ }

if (!rate && !type)
memset(ffi, 0, sizeof(struct f2fs_fault_info));
+ else
+ f2fs_info(sbi,
+ "build fault injection attr: rate: %lu, type: 0x%lx",
+ rate, type);
+ return 0;
}
#endif

@@ -886,14 +896,17 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount)
case Opt_fault_injection:
if (args->from && match_int(args, &arg))
return -EINVAL;
- f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
+ if (f2fs_build_fault_attr(sbi, arg,
+ F2FS_ALL_FAULT_TYPE))
+ return -EINVAL;
set_opt(sbi, FAULT_INJECTION);
break;

case Opt_fault_type:
if (args->from && match_int(args, &arg))
return -EINVAL;
- f2fs_build_fault_attr(sbi, 0, arg);
+ if (f2fs_build_fault_attr(sbi, 0, arg))
+ return -EINVAL;
set_opt(sbi, FAULT_INJECTION);
break;
#else
diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
index a568ce96cf56..7aa3844e7a80 100644
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -484,10 +484,16 @@ static ssize_t __sbi_store(struct f2fs_attr *a,
if (ret < 0)
return ret;
#ifdef CONFIG_F2FS_FAULT_INJECTION
- if (a->struct_type == FAULT_INFO_TYPE && t >= BIT(FAULT_MAX))
- return -EINVAL;
- if (a->struct_type == FAULT_INFO_RATE && t >= UINT_MAX)
- return -EINVAL;
+ if (a->struct_type == FAULT_INFO_TYPE) {
+ if (f2fs_build_fault_attr(sbi, 0, t))
+ return -EINVAL;
+ return count;
+ }
+ if (a->struct_type == FAULT_INFO_RATE) {
+ if (f2fs_build_fault_attr(sbi, t, 0))
+ return -EINVAL;
+ return count;
+ }
#endif
if (a->struct_type == RESERVED_BLOCKS) {
spin_lock(&sbi->stat_lock);
--
2.40.1

2024-05-11 00:56:25

by patchwork-bot+f2fs

Subject: Re: [f2fs-dev] [PATCH v2] f2fs: check validation of fault attrs in f2fs_build_fault_attr()

Hello:

This patch was applied to jaegeuk/f2fs.git (dev)
by Jaegeuk Kim <[email protected]>:

On Tue, 7 May 2024 11:38:47 +0800 you wrote:
> - It missed to check validation of fault attrs in parse_options(),
> let's fix to add check condition in f2fs_build_fault_attr().
> - Use f2fs_build_fault_attr() in __sbi_store() to clean up code.
>
> Signed-off-by: Chao Yu <[email protected]>
> ---
> v2:
> - add static for f2fs_build_fault_attr().
> fs/f2fs/f2fs.h | 12 ++++++++----
> fs/f2fs/super.c | 27 ++++++++++++++++++++-------
> fs/f2fs/sysfs.c | 14 ++++++++++----
> 3 files changed, 38 insertions(+), 15 deletions(-)

Here is the summary with links:
- [f2fs-dev,v2] f2fs: check validation of fault attrs in f2fs_build_fault_attr()
https://git.kernel.org/jaegeuk/f2fs/c/4ed886b187f4

You are awesome, thank you!
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