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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2018-06-06 14:07:34 -0300
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2018-06-08 17:27:46 -0300
commit283d98512272a12cb84e7798c23edbdf1adb287d (patch)
tree3691f644eb1109e70b48e97ac64314c9fdcedb7f /sysdeps
parent67c0579669ba1fc265d770252fab31babf887329 (diff)
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posix: Fix posix_spawnp to not execute invalid binaries in non compat mode (BZ#23264)
Current posix_spawnp implementation wrongly tries to execute invalid binaries (for instance script without shebang) as a shell script in non compat mode. It was a regression introduced by 9ff72da471a509a8c19791efe469f47fa6977410 when __spawni started to use __execvpe instead of __execve (glibc __execvpe try to execute ENOEXEC as shell script regardless). This patch fixes it by using an internal symbol (__execvpex) with the faulty semantic (since compat mode is handled by spawni.c itself). It was reported by Daniel Drake on libc-help [1]. Checked on x86_64-linux-gnu and i686-linux-gnu. [BZ #23264] * include/unistd.h (__execvpex): New prototype. * posix/Makefile (tests): Add tst-spawn4. (tests-internal): Add tst-spawn4-compat. * posix/execvpe.c (__execvpe_common, __execvpex): New functions. * posix/tst-spawn4-compat.c: New file. * posix/tst-spawn4.c: Likewise. * sysdeps/unix/sysv/linux/spawni.c (__spawni): Do not interpret invalid binaries as shell scripts. * sysdeps/posix/spawni.c (__spawni): Likewise. [1] https://sourceware.org/ml/libc-help/2018-06/msg00012.html
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/posix/spawni.c4
-rw-r--r--sysdeps/unix/sysv/linux/spawni.c4
2 files changed, 6 insertions, 2 deletions
diff --git a/sysdeps/posix/spawni.c b/sysdeps/posix/spawni.c
index 36bb5b4..b138ab4 100644
--- a/sysdeps/posix/spawni.c
+++ b/sysdeps/posix/spawni.c
@@ -310,6 +310,8 @@ __spawni (pid_t * pid, const char *file,
const posix_spawnattr_t * attrp, char *const argv[],
char *const envp[], int xflags)
{
+ /* It uses __execvpex to avoid run ENOEXEC in non compatibility mode (it
+ will be handled by maybe_script_execute). */
return __spawnix (pid, file, acts, attrp, argv, envp, xflags,
- xflags & SPAWN_XFLAGS_USE_PATH ? __execvpe : __execve);
+ xflags & SPAWN_XFLAGS_USE_PATH ? __execvpex : __execve);
}
diff --git a/sysdeps/unix/sysv/linux/spawni.c b/sysdeps/unix/sysv/linux/spawni.c
index 0391b9b..cf0213e 100644
--- a/sysdeps/unix/sysv/linux/spawni.c
+++ b/sysdeps/unix/sysv/linux/spawni.c
@@ -404,6 +404,8 @@ __spawni (pid_t * pid, const char *file,
const posix_spawnattr_t * attrp, char *const argv[],
char *const envp[], int xflags)
{
+ /* It uses __execvpex to avoid run ENOEXEC in non compatibility mode (it
+ will be handled by maybe_script_execute). */
return __spawnix (pid, file, acts, attrp, argv, envp, xflags,
- xflags & SPAWN_XFLAGS_USE_PATH ? __execvpe : __execve);
+ xflags & SPAWN_XFLAGS_USE_PATH ? __execvpex :__execve);
}