summary: Test for bz503723 (fopen mode 'x' ignored in some cases) description: | Bug summary: fopen mode 'x' ignored in some cases Bugzilla link: https://bugzilla.redhat.com/show_bug.cgi?id=503723 Description: Created an attachment (id=346240) fopen.c - test for fopen modes Description of problem: O_EXCL is not used if mode is "wbex", but O_EXCL is used if mode is "wbxe". This bug can cause security vulnerabilities in software relying on this glibc extension. Version-Release number of selected component (if applicable): 2.10.1-2, 2.9.90-3 How reproducible: always Steps to Reproduce: 1. compile attached C source file 2. run with options ababab wbex, and ababab wbxe 3. Actual results: 'x' may be ignored Expected results: 'x' not ignored Additional info: $ strace -eopen ./a.out ababab wbxe 2>&1 | grep ababab ; rm -f ababab open("ababab", O_WRONLY|O_CREAT|O_EXCL|O_TRUNC|O_CLOEXEC, 0666) = 3 $ strace -eopen ./a.out ababab wbex 2>&1 | grep ababab ; rm -f ababab open("ababab", O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC, 0666) = 3 contact: Petr Muller component: - glibc test: ./runtest.sh framework: shell recommend: - glibc - perl - strace - python - python3 - python38 tag: - simple - tier1_mfranc - mfranc_stable - noEWA - Tier1 - not-er15271 - glibc-buildroot-ready - NoRHEL4 duration: 90m link: - relates: https://bugzilla.redhat.com/show_bug.cgi?id=503723 extra-summary: /tools/glibc/Regression/bz503723-fopen-mode-x-ignored-in-some-cases extra-task: /tools/glibc/Regression/bz503723-fopen-mode-x-ignored-in-some-cases