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| author | Chao Yu <chao2.yu@samsung.com> | 2015-07-16 18:19:02 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-08-05 08:08:09 -0700 |
| commit | 55f57d2c4259a9a4048cf4629a2c6ba53729188d (patch) | |
| tree | 00308a663bd758c81f7c9bcc90d66b8dc7f52f0d /fs/f2fs/file.c | |
| parent | ecbaa4068f88f96a8ffde37d532e618508394b53 (diff) | |
| download | linux-55f57d2c4259a9a4048cf4629a2c6ba53729188d.tar.bz2 | |
f2fs: fix double lock in handle_failed_inode
In handle_failed_inode, there is a potential deadlock which can happen
in below call path:
- f2fs_create
- f2fs_lock_op down_read(cp_rwsem)
- f2fs_add_link
- __f2fs_add_link
- init_inode_metadata
- f2fs_init_security failed
- truncate_blocks failed
- handle_failed_inode
- f2fs_truncate
- truncate_blocks(..,true)
- write_checkpoint
- block_operations
- f2fs_lock_all down_write(cp_rwsem)
- f2fs_lock_op down_read(cp_rwsem)
So in this path, we pass parameter to f2fs_truncate to make sure
cp_rwsem in truncate_blocks will not be locked again.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/file.c')
| -rw-r--r-- | fs/f2fs/file.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index d0114710648e..15df014aadc7 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -579,7 +579,7 @@ out: return err; } -void f2fs_truncate(struct inode *inode) +void f2fs_truncate(struct inode *inode, bool lock) { if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))) @@ -593,7 +593,7 @@ void f2fs_truncate(struct inode *inode) return; } - if (!truncate_blocks(inode, i_size_read(inode), true)) { + if (!truncate_blocks(inode, i_size_read(inode), lock)) { inode->i_mtime = inode->i_ctime = CURRENT_TIME; mark_inode_dirty(inode); } @@ -656,7 +656,7 @@ int f2fs_setattr(struct dentry *dentry, struct iattr *attr) if (attr->ia_size <= i_size_read(inode)) { truncate_setsize(inode, attr->ia_size); - f2fs_truncate(inode); + f2fs_truncate(inode, true); f2fs_balance_fs(F2FS_I_SB(inode)); } else { /* |