do_coredump(): make sure that descriptor table isn't shared (179e037f) · Commits · 戴 / test

fs/exec.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -2066,6 +2066,7 @@ void do_coredump(long signr, int exit_code, struct pt_regs *regs)
		int retval = 0;
		int flag = 0;
		int ispipe;
		struct files_struct *displaced;
		bool need_nonrelative = false;
		static atomic_t core_dump_count = ATOMIC_INIT(0);
		struct coredump_params cprm = {
		@@ -2219,6 +2220,12 @@ void do_coredump(long signr, int exit_code, struct pt_regs *regs)
		goto close_fail;
		}

		/* get us an unshared descriptor table; almost always a no-op */
		retval = unshare_files(&displaced);
		if (retval)
		goto close_fail;
		if (displaced)
		put_files_struct(displaced);
		retval = binfmt->core_dump(&cprm);
		if (retval)
		current->signal->group_exit_code \|= 0x80;