forked from SLFO-pool/xen
39 lines
1.2 KiB
Diff
39 lines
1.2 KiB
Diff
|
# Commit f4f2f3402b2f4985d69ffc0d46f845d05fd0b60f
|
||
|
|
# Date 2024-05-07 15:18:36 +0100
|
||
|
|
# Author Andrew Cooper <andrew.cooper3@citrix.com>
|
||
|
|
# Committer Andrew Cooper <andrew.cooper3@citrix.com>
|
||
|
|
tools/libxs: Open /dev/xen/xenbus fds as O_CLOEXEC
|
||
|
|
|
||
|
|
The header description for xs_open() goes as far as to suggest that the fd is
|
||
|
|
O_CLOEXEC, but it isn't actually.
|
||
|
|
|
||
|
|
`xl devd` has been observed leaking /dev/xen/xenbus into children.
|
||
|
|
|
||
|
|
Link: https://github.com/QubesOS/qubes-issues/issues/8292
|
||
|
|
Reported-by: Demi Marie Obenour <demi@invisiblethingslab.com>
|
||
|
|
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
|
||
|
|
Reviewed-by: Juergen Gross <jgross@suse.com>
|
||
|
|
|
||
|
|
--- a/tools/libs/store/xs.c
|
||
|
|
+++ b/tools/libs/store/xs.c
|
||
|
|
@@ -54,6 +54,10 @@ struct xs_stored_msg {
|
||
|
|
#include <dlfcn.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
+#ifndef O_CLOEXEC
|
||
|
|
+#define O_CLOEXEC 0
|
||
|
|
+#endif
|
||
|
|
+
|
||
|
|
struct xs_handle {
|
||
|
|
/* Communications channel to xenstore daemon. */
|
||
|
|
int fd;
|
||
|
|
@@ -227,7 +231,7 @@ error:
|
||
|
|
static int get_dev(const char *connect_to)
|
||
|
|
{
|
||
|
|
/* We cannot open read-only because requests are writes */
|
||
|
|
- return open(connect_to, O_RDWR);
|
||
|
|
+ return open(connect_to, O_RDWR | O_CLOEXEC);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int all_restrict_cb(Xentoolcore__Active_Handle *ah, domid_t domid) {
|