diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2020-05-13 22:25:20 -0500 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2020-05-21 10:16:57 -0500 |
| commit | 8b72ca9004ed35104deb80b07990da5503bc5252 (patch) | |
| tree | 302fcaec6e95e41a23ca31981e693dbcfd58af3f /fs/exec.c | |
| parent | a16b3357b2b8e910bb614254d8a7e84d2bd59b4c (diff) | |
| download | lwn-8b72ca9004ed35104deb80b07990da5503bc5252.tar.gz lwn-8b72ca9004ed35104deb80b07990da5503bc5252.zip | |
exec: Move the call of prepare_binprm into search_binary_handler
The code in prepare_binary_handler needs to be run every time
search_binary_handler is called so move the call into search_binary_handler
itself to make the code simpler and easier to understand.
Link: https://lkml.kernel.org/r/87d070zrvx.fsf_-_@x220.int.ebiederm.org
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: James Morris <jamorris@linux.microsoft.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'fs/exec.c')
| -rw-r--r-- | fs/exec.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/fs/exec.c b/fs/exec.c index 028e0e323af5..5fc458460e44 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -1629,7 +1629,7 @@ static void bprm_fill_uid(struct linux_binprm *bprm) * * This may be called multiple times for binary chains (scripts for example). */ -int prepare_binprm(struct linux_binprm *bprm) +static int prepare_binprm(struct linux_binprm *bprm) { loff_t pos = 0; @@ -1650,8 +1650,6 @@ int prepare_binprm(struct linux_binprm *bprm) return kernel_read(bprm->file, bprm->buf, BINPRM_BUF_SIZE, &pos); } -EXPORT_SYMBOL(prepare_binprm); - /* * Arguments are '\0' separated strings found at the location bprm->p * points to; chop off the first by relocating brpm->p to right after @@ -1707,6 +1705,10 @@ int search_binary_handler(struct linux_binprm *bprm) if (bprm->recursion_depth > 5) return -ELOOP; + retval = prepare_binprm(bprm); + if (retval < 0) + return retval; + retval = security_bprm_check(bprm); if (retval) return retval; @@ -1864,10 +1866,6 @@ static int __do_execve_file(int fd, struct filename *filename, if (retval) goto out; - retval = prepare_binprm(bprm); - if (retval < 0) - goto out; - retval = copy_strings_kernel(1, &bprm->filename, bprm); if (retval < 0) goto out; |