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| author | Eric W. Biederman <ebiederm@xmission.com> | 2020-03-12 16:17:17 +0100 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2020-05-07 23:54:27 +0200 |
| commit | e7f7785449a1f459a4a3ca92f82f56fb054dd2b9 (patch) | |
| tree | 0aa2cf5187e06df04c4346f8326a99c82009fe3f /fs/binfmt_flat.c | |
| parent | Linux 5.7-rc3 (diff) | |
| download | linux-e7f7785449a1f459a4a3ca92f82f56fb054dd2b9.tar.xz linux-e7f7785449a1f459a4a3ca92f82f56fb054dd2b9.zip | |
binfmt: Move install_exec_creds after setup_new_exec to match binfmt_elf
In 2016 Linus moved install_exec_creds immediately after
setup_new_exec, in binfmt_elf as a cleanup and as part of closing a
potential information leak.
Perform the same cleanup for the other binary formats.
Different binary formats doing the same things the same way makes exec
easier to reason about and easier to maintain.
Greg Ungerer reports:
> I tested the the whole series on non-MMU m68k and non-MMU arm
> (exercising binfmt_flat) and it all tested out with no problems,
> so for the binfmt_flat changes:
Tested-by: Greg Ungerer <gerg@linux-m68k.org>
Ref: 9f834ec18def ("binfmt_elf: switch to new creds when switching to new mm")
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Greg Ungerer <gerg@linux-m68k.org>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'fs/binfmt_flat.c')
| -rw-r--r-- | fs/binfmt_flat.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c index 831a2b25ba79..1a1d1fcb893f 100644 --- a/fs/binfmt_flat.c +++ b/fs/binfmt_flat.c @@ -541,6 +541,7 @@ static int load_flat_file(struct linux_binprm *bprm, /* OK, This is the point of no return */ set_personality(PER_LINUX_32BIT); setup_new_exec(bprm); + install_exec_creds(bprm); } /* @@ -963,8 +964,6 @@ static int load_flat_binary(struct linux_binprm *bprm) } } - install_exec_creds(bprm); - set_binfmt(&flat_format); #ifdef CONFIG_MMU |