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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2023-11-06 17:25:45 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2023-11-21 16:15:42 -0300 |
| commit | 4a133885a7c8ae7ebe34e36fcdb353f8e94c810f (patch) | |
| tree | 3e7b0282fa619485f4a6f3873457e112b735962b /elf/Makefile | |
| parent | 1c87f71a36e21fa851117c151b3c492fa3eede5b (diff) | |
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elf: Ignore LD_PROFILE for setuid binaries
Loader does not ignore LD_PROFILE in secure-execution mode (different
than man-page states [1]), rather it uses a different path
(/var/profile) and ignore LD_PROFILE_OUTPUT.
Allowing secure-execution profiling is already a non good security
boundary, since it enables different code paths and extra OS access by
the process. But by ignoring LD_PROFILE_OUTPUT, the resulting profile
file might also be acceded in a racy manner since the file name does not
use any process-specific information (such as pid, timing, etc.).
Another side-effect is it forces lazy binding even on libraries that
might be with DF_BIND_NOW.
[1] https://man7.org/linux/man-pages/man8/ld.so.8.html
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Diffstat (limited to 'elf/Makefile')
| -rw-r--r-- | elf/Makefile | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/elf/Makefile b/elf/Makefile index 1af8ca4f84..414fdbdec8 100644 --- a/elf/Makefile +++ b/elf/Makefile @@ -3002,3 +3002,6 @@ $(objpfx)tst-non-directory-path.out: tst-non-directory-path.sh \ $(evaluate-test) tst-env-setuid-ARGS = -- $(host-test-program-cmd) + +# Reuse a module with a SONAME, to specific as the LD_PROFILE. +$(objpfx)tst-env-setuid: $(objpfx)tst-sonamemove-runmod2.so |