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| author | Al Viro <viro@zeniv.linux.org.uk> | 2018-07-10 19:12:05 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2018-07-12 16:04:13 +0200 |
| commit | 6de37b6dc085e7c5e092b69289af66876526da44 (patch) | |
| tree | 5d2519411b954eb4d97c70fb972d7b8a1fb1c635 /fs/file_table.c | |
| parent | alloc_file(): switch to passing O_... flags instead of FMODE_... mode (diff) | |
| download | linux-6de37b6dc085e7c5e092b69289af66876526da44.tar.xz linux-6de37b6dc085e7c5e092b69289af66876526da44.zip | |
pass creds to get_empty_filp(), make sure dentry_open() passes the right creds
... and rename get_empty_filp() to alloc_empty_file().
dentry_open() gets creds as argument, but the only thing that sees those is
security_file_open() - file->f_cred still ends up with current_cred(). For
almost all callers it's the same thing, but there are several broken cases.
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/file_table.c')
| -rw-r--r-- | fs/file_table.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/fs/file_table.c b/fs/file_table.c index 086c3f5ec31a..76cfa4c43e13 100644 --- a/fs/file_table.c +++ b/fs/file_table.c @@ -101,9 +101,8 @@ int proc_nr_files(struct ctl_table *table, int write, * done, you will imbalance int the mount's writer count * and a warning at __fput() time. */ -struct file *get_empty_filp(void) +struct file *alloc_empty_file(const struct cred *cred) { - const struct cred *cred = current_cred(); static long old_max; struct file *f; int error; @@ -161,7 +160,7 @@ struct file *alloc_file(const struct path *path, int flags, { struct file *file; - file = get_empty_filp(); + file = alloc_empty_file(current_cred()); if (IS_ERR(file)) return file; |