diff options
| author | Amir Goldstein <amir73il@gmail.com> | 2023-07-01 20:11:34 +0300 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2023-07-02 13:15:49 +0200 |
| commit | dff745c1221a402b4921d54f292288373cff500c (patch) | |
| tree | e2245a005ed20bc43bce3d6c621fa710cb902758 /fs/file_table.c | |
| parent | 995b406c7e972fab181a4bb57f3b95e59b8e5bf3 (diff) | |
fs: move cleanup from init_file() into its callers
The use of file_free_rcu() in init_file() to free the struct that was
allocated by the caller was hacky and we got what we deserved.
Let init_file() and its callers take care of cleaning up each after
their own allocated resources on error.
Fixes: 62d53c4a1dfe ("fs: use backing_file container for internal files with "fake" f_path") # mainline only
Reported-and-tested-by: syzbot+ada42aab05cf51b00e98@syzkaller.appspotmail.com
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Message-Id: <20230701171134.239409-1-amir73il@gmail.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'fs/file_table.c')
| -rw-r--r-- | fs/file_table.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/fs/file_table.c b/fs/file_table.c index e06c68e2d757..fc7d677ff5ad 100644 --- a/fs/file_table.c +++ b/fs/file_table.c @@ -160,7 +160,7 @@ static int init_file(struct file *f, int flags, const struct cred *cred) f->f_cred = get_cred(cred); error = security_file_alloc(f); if (unlikely(error)) { - file_free_rcu(&f->f_rcuhead); + put_cred(f->f_cred); return error; } @@ -208,8 +208,10 @@ struct file *alloc_empty_file(int flags, const struct cred *cred) return ERR_PTR(-ENOMEM); error = init_file(f, flags, cred); - if (unlikely(error)) + if (unlikely(error)) { + kmem_cache_free(filp_cachep, f); return ERR_PTR(error); + } percpu_counter_inc(&nr_files); @@ -240,8 +242,10 @@ struct file *alloc_empty_file_noaccount(int flags, const struct cred *cred) return ERR_PTR(-ENOMEM); error = init_file(f, flags, cred); - if (unlikely(error)) + if (unlikely(error)) { + kmem_cache_free(filp_cachep, f); return ERR_PTR(error); + } f->f_mode |= FMODE_NOACCOUNT; @@ -265,8 +269,10 @@ struct file *alloc_empty_backing_file(int flags, const struct cred *cred) return ERR_PTR(-ENOMEM); error = init_file(&ff->file, flags, cred); - if (unlikely(error)) + if (unlikely(error)) { + kfree(ff); return ERR_PTR(error); + } ff->file.f_mode |= FMODE_BACKING | FMODE_NOACCOUNT; return &ff->file; |