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Description of problem:
libvirtd crashed randomly during start
Version-Release number of selected component (if applicable):
libvirt-4.5.0-2.el7.x86_64
How reproducible:
40%
Steps to Reproduce:
1. restart libvirtd on a host which have heavy workload
2.
3.
Actual results:
libvirtd crashed during start
Expected results:
No invalid memory access
Additional info:
valgrind:
==11847== For counts of detected and suppressed errors, rerun with: -v
==11847== ERROR SUMMARY: 23 errors from 23 contexts (suppressed: 0 from 0)
==11781== Thread 19:
==11781== Conditional jump or move depends on uninitialised value(s)
==11781== at 0x4C2AC70: free (vg_replace_malloc.c:530)
==11781== by 0x536F159: virFree (viralloc.c:582)
==11781== by 0x54A1C33: virDomainConfNWFilterInstantiate (domain_nwfilter.c:122)
==11781== by 0x321D4C05: qemuProcessFiltersInstantiate (qemu_process.c:3028)
==11781== by 0x321D4C05: qemuProcessReconnect (qemu_process.c:7658)
==11781== by 0x54208A4: virThreadHelper (virthread.c:206)
==11781== by 0x8429DD4: start_thread (in /usr/lib64/libpthread-2.17.so)
==11781== by 0x873BEAC: clone (in /usr/lib64/libc-2.17.so)
==11781==
==11781== Invalid free() / delete / delete[] / realloc()
==11781== at 0x4C2ACBD: free (vg_replace_malloc.c:530)
==11781== by 0x536F159: virFree (viralloc.c:582)
==11781== by 0x54A1C33: virDomainConfNWFilterInstantiate (domain_nwfilter.c:122)
==11781== by 0x321D4C05: qemuProcessFiltersInstantiate (qemu_process.c:3028)
==11781== by 0x321D4C05: qemuProcessReconnect (qemu_process.c:7658)
==11781== by 0x54208A4: virThreadHelper (virthread.c:206)
==11781== by 0x8429DD4: start_thread (in /usr/lib64/libpthread-2.17.so)
==11781== by 0x873BEAC: clone (in /usr/lib64/libc-2.17.so)
==11781== Address 0x2bc7 is not stack'd, malloc'd or (recently) free'd
==11781==
GDB:
#0 0x00007ffff428d59c in free () from /lib64/libc.so.6
#1 0x00007ffff721314a in virFree (ptrptr=ptrptr@entry=0x7fffc67f1b00) at util/viralloc.c:582
#2 0x00007ffff7345ac4 in virDomainConfNWFilterInstantiate (vmname=<optimized out>, vmuuid=vmuuid@entry=0x7fffc017e898 "߉\237\\۔H\262\206z\340\302f\265\233z", net=<optimized out>,
ignoreExists=ignoreExists@entry=true) at conf/domain_nwfilter.c:122
#3 0x00007fffca5a77f6 in qemuProcessFiltersInstantiate (ignoreExists=true, def=0x7fffc017e890) at qemu/qemu_process.c:3028
#4 qemuProcessReconnect (opaque=<optimized out>) at qemu/qemu_process.c:7653
#5 0x00007ffff72c4895 in virThreadHelper (data=<optimized out>) at util/virthread.c:206
#6 0x00007ffff45dcdd5 in start_thread () from /lib64/libpthread.so.0
#7 0x00007ffff4305ead in clone () from /lib64/libc.so.6
This upstream commit should fix this issue:
commit d7557f5f6f51264c1b5623e97f7b4d5259d4d3b6
Author: Luyao Huang <lhuang>
Date: Thu Jul 5 12:34:11 2018 +0800
virDomainConfNWFilterInstantiate: initialize @xml to avoid random crash
If the code jump to the cleanup before assigning value to @xml
libvirtd may crash when it tries to free an uninitialized pointer.
backtrace:
0 0x00007ffff428d59c in free () from /lib64/libc.so.6
1 0x00007ffff721314a in virFree (ptrptr=ptrptr@entry=0x7fffc67f1b00) at util/viralloc.c:582
2 0x00007ffff7345ac4 in virDomainConfNWFilterInstantiate (vmname=<optimized out>,
vmuuid=vmuuid@entry=0x7fffc0181ca8 "߉\237\\۔H\262\206z\340\302f\265\233z", net=<optimized out>,
ignoreExists=ignoreExists@entry=true) at conf/domain_nwfilter.c:122
3 0x00007fffca5a77f6 in qemuProcessFiltersInstantiate (ignoreExists=true, def=0x7fffc0181ca0) at qemu/qemu_process.c:3028
4 qemuProcessReconnect (opaque=<optimized out>) at qemu/qemu_process.c:7653
5 0x00007ffff72c4895 in virThreadHelper (data=<optimized out>) at util/virthread.c:206
6 0x00007ffff45dcdd5 in start_thread () from /lib64/libpthread.so.0
7 0x00007ffff4305ead in clone () from /lib64/libc.so.6
Signed-off-by: Luyao Huang <lhuang>
v4.5.0-44-gd7557f5
Verify this bug with libvirt-4.5.0-6.el7.x86_64:
1. use valgrind to start libvirtd cannot find invalid memory free error
2. restart libvirtd in a heavy workload host several times, no libvirtd crash happened
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHSA-2018:3113
Description of problem: libvirtd crashed randomly during start Version-Release number of selected component (if applicable): libvirt-4.5.0-2.el7.x86_64 How reproducible: 40% Steps to Reproduce: 1. restart libvirtd on a host which have heavy workload 2. 3. Actual results: libvirtd crashed during start Expected results: No invalid memory access Additional info: valgrind: ==11847== For counts of detected and suppressed errors, rerun with: -v ==11847== ERROR SUMMARY: 23 errors from 23 contexts (suppressed: 0 from 0) ==11781== Thread 19: ==11781== Conditional jump or move depends on uninitialised value(s) ==11781== at 0x4C2AC70: free (vg_replace_malloc.c:530) ==11781== by 0x536F159: virFree (viralloc.c:582) ==11781== by 0x54A1C33: virDomainConfNWFilterInstantiate (domain_nwfilter.c:122) ==11781== by 0x321D4C05: qemuProcessFiltersInstantiate (qemu_process.c:3028) ==11781== by 0x321D4C05: qemuProcessReconnect (qemu_process.c:7658) ==11781== by 0x54208A4: virThreadHelper (virthread.c:206) ==11781== by 0x8429DD4: start_thread (in /usr/lib64/libpthread-2.17.so) ==11781== by 0x873BEAC: clone (in /usr/lib64/libc-2.17.so) ==11781== ==11781== Invalid free() / delete / delete[] / realloc() ==11781== at 0x4C2ACBD: free (vg_replace_malloc.c:530) ==11781== by 0x536F159: virFree (viralloc.c:582) ==11781== by 0x54A1C33: virDomainConfNWFilterInstantiate (domain_nwfilter.c:122) ==11781== by 0x321D4C05: qemuProcessFiltersInstantiate (qemu_process.c:3028) ==11781== by 0x321D4C05: qemuProcessReconnect (qemu_process.c:7658) ==11781== by 0x54208A4: virThreadHelper (virthread.c:206) ==11781== by 0x8429DD4: start_thread (in /usr/lib64/libpthread-2.17.so) ==11781== by 0x873BEAC: clone (in /usr/lib64/libc-2.17.so) ==11781== Address 0x2bc7 is not stack'd, malloc'd or (recently) free'd ==11781== GDB: #0 0x00007ffff428d59c in free () from /lib64/libc.so.6 #1 0x00007ffff721314a in virFree (ptrptr=ptrptr@entry=0x7fffc67f1b00) at util/viralloc.c:582 #2 0x00007ffff7345ac4 in virDomainConfNWFilterInstantiate (vmname=<optimized out>, vmuuid=vmuuid@entry=0x7fffc017e898 "߉\237\\۔H\262\206z\340\302f\265\233z", net=<optimized out>, ignoreExists=ignoreExists@entry=true) at conf/domain_nwfilter.c:122 #3 0x00007fffca5a77f6 in qemuProcessFiltersInstantiate (ignoreExists=true, def=0x7fffc017e890) at qemu/qemu_process.c:3028 #4 qemuProcessReconnect (opaque=<optimized out>) at qemu/qemu_process.c:7653 #5 0x00007ffff72c4895 in virThreadHelper (data=<optimized out>) at util/virthread.c:206 #6 0x00007ffff45dcdd5 in start_thread () from /lib64/libpthread.so.0 #7 0x00007ffff4305ead in clone () from /lib64/libc.so.6