From: Alan Cox <alan@linux.intel.com>
Date: Wed, 19 Apr 2017 23:13:42 +0000 (+0100)
Subject: syscall_exec16: handle disk read failure on exec properly
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=e6d0a20a2f0911542ad5d0a8d682fa33ba9cf9c8;p=FUZIX.git

syscall_exec16: handle disk read failure on exec properly

We now kill the process so we don't execute a misloaded image
---

diff --git a/Kernel/syscall_exec16.c b/Kernel/syscall_exec16.c
index 3ff1720e..bc8a65d6 100644
--- a/Kernel/syscall_exec16.c
+++ b/Kernel/syscall_exec16.c
@@ -210,7 +210,11 @@ arg_t _execve(void)
 
 	if (bin_size > 512) {
 		bin_size -= 512;
-		bload(ino, 1, progptr, bin_size);
+		if (bload(ino, 1, progptr, bin_size) < 0) {
+			/* Must not run userspace */
+			ssig(udata.u_ptab, SIGKILL);
+			goto nogood3;
+		}
 		progptr += bin_size;
 	}