add new classifier result

1 files changed, 27 insertions, 0 deletions

diff --git a/results/classifier/105/instruction/1061778 b/results/classifier/105/instruction/1061778
new file mode 100644
index 00000000..f1861c20
--- /dev/null
+++ b/results/classifier/105/instruction/1061778
@@ -0,0 +1,27 @@
+instruction: 0.757
+network: 0.738
+socket: 0.655
+device: 0.564
+semantic: 0.535
+graphic: 0.481
+vnc: 0.374
+mistranslation: 0.268
+boot: 0.168
+other: 0.128
+assembly: 0.117
+KVM: 0.043
+
+signal mask not reset on exec
+
+Seen in qemu-1.0 under 12.04, but AFAICT from current git it hasn't changed.
+
+./main-loop.c:qemu_signal_init blocks SIGALRM so it can be handled via signalfd.
+
+./net/tap.c:launch_script does not reset the signal mask before the execv() call, and signal masks are inherited. So the script is run with SIGALRM blocked (as can be seen in /proc/$$/status, "SigBlk:	0000000000002000"). One reasonable example of where this bites is an interface up script that calls ping with a timeout to give things a chance to settle down before continuing, but abort if this doesn't happen within a reasonable time). Since ping uses SIGALRM for the timeout, this now never terminates.
+
+qemu-0.14 didn't block SIGALRM, so such scripts worked fine there.
+
+Triaging old bug tickets... can you still reproduce this issue with the latest version of QEMU? Or could we close this ticket nowadays?
+
+[Expired for QEMU because there has been no activity for 60 days.]
+