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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2025-03-14 16:09:57 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2025-03-21 15:46:48 -0300 |
| commit | ed6a68bac7cd056abda9008019c71b167f0362dc (patch) | |
| tree | 7ceb7f6403f423e4773724c518e537e13f140a3d /Makeconfig | |
| parent | 1894e219dc530d7074085e95ffe3c1e66cebc072 (diff) | |
| download | glibc-ed6a68bac7cd056abda9008019c71b167f0362dc.tar.xz glibc-ed6a68bac7cd056abda9008019c71b167f0362dc.zip | |
debug: Improve '%n' fortify detection (BZ 30932)
The 7bb8045ec0 path made the '%n' fortify check ignore EMFILE errors
while trying to open /proc/self/maps, and this added a security
issue where EMFILE can be attacker-controlled thus making it
ineffective for some cases.
The EMFILE failure is reinstated but with a different error
message. Also, to improve the false positive of the hardening for
the cases where no new files can be opened, the
_dl_readonly_area now uses _dl_find_object to check if the
memory area is within a writable ELF segment. The procfs method is
still used as fallback.
Checked on x86_64-linux-gnu and i686-linux-gnu.
Reviewed-by: Arjun Shankar <arjun@redhat.com>
Diffstat (limited to 'Makeconfig')
| -rw-r--r-- | Makeconfig | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Makeconfig b/Makeconfig index aa547a443f..bf50406656 100644 --- a/Makeconfig +++ b/Makeconfig @@ -633,7 +633,7 @@ link-libc-printers-tests = $(link-libc-rpath) \ $(link-libc-tests-after-rpath-link) # This is how to find at build-time things that will be installed there. -rpath-dirs = math elf dlfcn nss nis rt resolv mathvec support misc +rpath-dirs = math elf dlfcn nss nis rt resolv mathvec support misc debug rpath-link = \ $(common-objdir):$(subst $(empty) ,:,$(patsubst ../$(subdir),.,$(rpath-dirs:%=$(common-objpfx)%))) else # build-static |