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[Qemu-devel] [PATCH] vl: fix -sandbox parsing crash when seccomp support
From: |
Marc-André Lureau |
Subject: |
[Qemu-devel] [PATCH] vl: fix -sandbox parsing crash when seccomp support is disabled |
Date: |
Mon, 29 Apr 2019 15:47:57 +0200 |
$ ./x86_64-softmmu/qemu-system-x86_64 -sandbox off
qemu-system-x86_64: -sandbox off: There is no option group 'sandbox'
Segmentation fault
Commit 5780760f5e ("seccomp: check TSYNC host capability") wrapped one
use of the sandbox option group to produce a sensible error, it didn't
do the same for another call to qemu_opts_parse_noisily():
(gdb) bt
at util/qemu-option.c:829
#0 0x00000000105b36d8 in opts_parse (list=0x0, params=0x3ffffffffab5 "off",
permit_abbrev=true, defaults=false, errp=0x3ffffffff080)
at util/qemu-option.c:829
#1 0x00000000105b3b74 in qemu_opts_parse_noisily (list=<optimized out>,
params=<optimized out>, permit_abbrev=<optimized out>) at util/qemu-option.c:890
#2 0x0000000010024964 in main (argc=<optimized out>, argv=<optimized out>,
envp=<optimized out>) at vl.c:3589
Fixes: 5780760f5ea6163939a5dabe7427318b4f07d1a2
Cc: address@hidden
Cc: address@hidden
Signed-off-by: Marc-André Lureau <address@hidden>
---
vl.c | 18 ++++++++++--------
1 file changed, 10 insertions(+), 8 deletions(-)
diff --git a/vl.c b/vl.c
index 4019a4387d..5fc4994d3c 100644
--- a/vl.c
+++ b/vl.c
@@ -3866,17 +3866,19 @@ int main(int argc, char **argv, char **envp)
qtest_log = optarg;
break;
case QEMU_OPTION_sandbox:
-#ifdef CONFIG_SECCOMP
- opts = qemu_opts_parse_noisily(qemu_find_opts("sandbox"),
- optarg, true);
+ olist = qemu_find_opts("sandbox");
+ if (!olist) {
+#ifndef CONFIG_SECCOMP
+ error_report("-sandbox support is not enabled "
+ "in this QEMU binary");
+#endif
+ exit(1);
+ }
+
+ opts = qemu_opts_parse_noisily(olist, optarg, true);
if (!opts) {
exit(1);
}
-#else
- error_report("-sandbox support is not enabled "
- "in this QEMU binary");
- exit(1);
-#endif
break;
case QEMU_OPTION_add_fd:
#ifndef _WIN32
--
2.21.0.777.g83232e3864
- [Qemu-devel] [PATCH] vl: fix -sandbox parsing crash when seccomp support is disabled,
Marc-André Lureau <=