| Summary: | press 'Ctrl + |' will trigger the chardev socket for virtagent quit (core dumped) | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | Sibiao Luo <sluo> |
| Component: | nc | Assignee: | Petr Šabata <psabata> |
| Status: | CLOSED NOTABUG | QA Contact: | BaseOS QE Security Team <qe-baseos-security> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 6.5 | CC: | acathrow, bsarathy, chayang, flang, jcody, juzhang, michen, mkenneth, qzhang, virt-maint, xfu |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2013-10-31 07:22:46 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
My qemu-kvm command line: # /usr/libexec/qemu-kvm -M pc -S -cpu SandyBridge -enable-kvm -m 2048 -smp 2,sockets=2,cores=1,threads=1 -no-kvm-pit-reinjection -usb -device usb-tablet,id=input0 -name sluo -uuid 990ea161-6b67-47b2-b803-19fb01d30d30 -rtc base=localtime,clock=host,driftfix=slew -drive file=/home/Qemu-ga-RHEL-Server-6.5-64bit.qcow2,if=none,id=drive-virtio-disk,format=qcow2,cache=none,aio=native,werror=stop,rerror=stop -device virtio-blk-pci,vectors=0,bus=pci.0,addr=0x4,scsi=off,drive=drive-virtio-disk,id=virtio-disk,bootindex=1 -netdev tap,id=hostnet0,vhost=on,script=/etc/qemu-ifup -device virtio-net-pci,netdev=hostnet0,id=virtio-net-pci0,mac=2C:41:38:B6:40:21,bus=pci.0,addr=0x5 -device virtio-balloon-pci,id=ballooning,bus=pci.0,addr=0x6 -global PIIX4_PM.disable_s3=0 -global PIIX4_PM.disable_s4=0 -k en-us -boot menu=on -qmp tcp:0:4444,server,nowait -serial unix:/tmp/ttyS0,server,nowait -vnc :1 -spice disable-ticketing,port=5931 -monitor stdio -chardev socket,path=/tmp/qga.sock,server,nowait,id=qga0 -device virtio-serial -device virtserialport,chardev=qga0,name=org.qemu.guest_agent.0 This request was evaluated by Red Hat Product Management for inclusion in the current release of Red Hat Enterprise Linux. Because the affected component is not scheduled to be updated in the current release, Red Hat is unable to address this request at this time. Red Hat invites you to ask your support representative to propose this request, if appropriate, in the next release of Red Hat Enterprise Linux. This looks like you're sending SIGQUIT to the process and the behavior is thus valid. Closing as NOTABUG. |
Description of problem: met this quit (core dumped) by chance that when start guest with virtio serial and start guest agent inside guest, then connect the chardev socket in host side for sending commands to guest and press 'Ctrl |' keyboard will trigger the chardev socket for virtagent quit (core dumped). Version-Release number of selected component (if applicable): host info: 2.6.32-420.el6.x86_64 qemu-kvm-0.12.1.2-2.410.el6.x86_64 nc-1.84-22.el6.x86_64 guest info: 2.6.32-420.el6.x86_64 qemu-guest-agent-0.12.1.2-2.410.el6.x86_64 How reproducible: Steps to Reproduce: 1.start guest with virtio serial and start guest agent inside guest. e.g:...-chardev socket,path=/tmp/qga.sock,server,nowait,id=qga0 -device virtio-serial -device virtserialport,chardev=qga0,name=org.qemu.guest_agent.0 2.connect the chardev socket in host side for sending commands to guest. # service qemu-ga restart Stopping qemu-ga: [ OK ] Starting qemu-ga: [ OK ] # service qemu-ga status qemu-ga (pid 2576) is running... 3.press \ and 'Ctrl |' keyboard. # nc -U /tmp/qga.sock readline \ <----------press '\' {"error": {"class": "JSONParsing", "desc": "Invalid JSON syntax", "data": {}}} ^\Quit (core dumped) <----------press '|' Actual results: after step 3, the chardev socket for virtagent quit (core dumped), bt log as following: Core was generated by `nc -U /tmp/qga.sock readline'. Program terminated with signal 3, Quit. #0 0x00000034012df2d8 in poll () from /lib64/libc.so.6 Missing separate debuginfos, use: debuginfo-install glib2-2.26.1-3.el6.x86_64 glibc-2.12-1.130.el6.x86_64 (gdb) bt #0 0x00000034012df2d8 in poll () from /lib64/libc.so.6 #1 0x0000000000401ae9 in readwrite (nfd=3) at netcat.c:712 #2 0x000000000040302c in main (argc=<value optimized out>, argv=<value optimized out>) at netcat.c:366 (gdb) bt full #0 0x00000034012df2d8 in poll () from /lib64/libc.so.6 No symbol table info available. #1 0x0000000000401ae9 in readwrite (nfd=3) at netcat.c:712 pfd = {{fd = 3, events = 1, revents = 0}, {fd = 0, events = 1, revents = 0}} buf = '\000' <repeats 16120 times>"\352, R#\001\064", '\000' <repeats 11 times>, "\004\000\000\000\000\000\000\000\300\016Y\001\064\000\000\000\004\000\000\000\000\000\000\000\030\000\000\000\000\000\000\000\000O>\257\377\177\000\000\260N>\257\377\177\000\000\235\343,\001\064", '\000' <repeats 11 times>"\330, =@\000\000\000\000\000\000\000\000\000\001", '\000' <repeats 11 times>, "\001", '\000' <repeats 15 times>, "H\222>\257\377\177", '\000' <repeats 18 times>, "\003", '\000' <repeats 15 times>, "+$@\000\000\000\000\000\001\000/tmp/qga.sock", '\000' <repeats 80 times> n = <value optimized out> wfd = <value optimized out> lfd = <value optimized out> plen = <value optimized out> #2 0x000000000040302c in main (argc=<value optimized out>, argv=<value optimized out>) at netcat.c:366 ch = <value optimized out> s = 3 ret = 0 socksv = 5 host = 0x7fffaf3e9877 "/tmp/qga.sock" uport = <value optimized out> endp = 0x0 hints = {ai_flags = 0, ai_family = 0, ai_socktype = 0, ai_protocol = 0, ai_addrlen = 0, ai_addr = 0x0, ai_canonname = 0x0, ai_next = 0x0} sv = 0x0 len = <value optimized out> cliaddr = {ss_family = 37150, __ss_align = 223357765255, __ss_padding = "v", '\000' <repeats 23 times>"\377, \262\360\000\000\000\000\000\302\000\000\000\000\000\000\000\036\221>\257\377\177\000\000\037\221>\257\377\177\000\000\001", '\000' <repeats 15 times>"\355, \b)\001\064", '\000' <repeats 11 times>, "\020\070@", '\000' <repeats 13 times>, "\003\020@\000\000\000\000"} proxy = <value optimized out> proxyhost = <value optimized out> proxyport = <value optimized out> proxyhints = {ai_flags = 0, ai_family = 0, ai_socktype = 0, ai_protocol = 0, ai_addrlen = 0, ai_addr = 0x0, ai_canonname = 0x0, ai_next = 0x0} (gdb) Expected results: it should not quit and no any core dump, it should give a prompt message instead, like: {"error": {"class": "JSONParsing", "desc": "Invalid JSON syntax", "data": {}}} Additional info: