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linux-user: handle /proc/self/exe with execve() syscall

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If path is /proc/self/exe, use the executable path
provided by exec_path.

Don't use execfd as it is closed by loader_exec() and otherwise
will survive to the exec() syscall and be usable child process.

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20220927124357.688536-2-laurent@vivier.eu>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Laurent Vivier 2022-09-27 14:43:56 +02:00
parent 46187d707e
commit f07eb1c4f8
1 changed files with 5 additions and 1 deletions
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6
linux-user/syscall.c
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@ -8860,7 +8860,11 @@ static abi_long do_syscall1(CPUArchState *cpu_env, int num, abi_long arg1,
* before the execve completes and makes it the other
* program's problem.
*/
ret = get_errno(safe_execve(p, argp, envp));
if (is_proc_myself(p, "exe")) {
ret = get_errno(safe_execve(exec_path, argp, envp));
} else {
ret = get_errno(safe_execve(p, argp, envp));
}
unlock_user(p, arg1, 0);
goto execve_end;