From 0c7af1a778d036402ec0829783afee1ce6ea942c Mon Sep 17 00:00:00 2001 From: "Rao, Lei" Date: Tue, 8 Jun 2021 16:23:30 +0800 Subject: [PATCH] Add the function of colo_compare_cleanup This patch fixes the following: #0 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50 #1 0x00007f6ae4559859 in __GI_abort () at abort.c:79 #2 0x0000559aaa386720 in error_exit (err=16, msg=0x559aaa5973d0 <__func__.16227> "qemu_mutex_destroy") at util/qemu-thread-posix.c:36 #3 0x0000559aaa3868c5 in qemu_mutex_destroy (mutex=0x559aabffe828) at util/qemu-thread-posix.c:69 #4 0x0000559aaa2f93a8 in char_finalize (obj=0x559aabffe800) at chardev/char.c:285 #5 0x0000559aaa23318a in object_deinit (obj=0x559aabffe800, type=0x559aabfd7d20) at qom/object.c:606 #6 0x0000559aaa2331b8 in object_deinit (obj=0x559aabffe800, type=0x559aabfd9060) at qom/object.c:610 #7 0x0000559aaa233200 in object_finalize (data=0x559aabffe800) at qom/object.c:620 #8 0x0000559aaa234202 in object_unref (obj=0x559aabffe800) at qom/object.c:1074 #9 0x0000559aaa2356b6 in object_finalize_child_property (obj=0x559aac0dac10, name=0x559aac778760 "compare0-0", opaque=0x559aabffe800) at qom/object.c:1584 #10 0x0000559aaa232f70 in object_property_del_all (obj=0x559aac0dac10) at qom/object.c:557 #11 0x0000559aaa2331ed in object_finalize (data=0x559aac0dac10) at qom/object.c:619 #12 0x0000559aaa234202 in object_unref (obj=0x559aac0dac10) at qom/object.c:1074 #13 0x0000559aaa2356b6 in object_finalize_child_property (obj=0x559aac0c75c0, name=0x559aac0dadc0 "chardevs", opaque=0x559aac0dac10) at qom/object.c:1584 #14 0x0000559aaa233071 in object_property_del_child (obj=0x559aac0c75c0, child=0x559aac0dac10, errp=0x0) at qom/object.c:580 #15 0x0000559aaa233155 in object_unparent (obj=0x559aac0dac10) at qom/object.c:599 #16 0x0000559aaa2fb721 in qemu_chr_cleanup () at chardev/char.c:1159 #17 0x0000559aa9f9b110 in main (argc=54, argv=0x7ffeb62fa998, envp=0x7ffeb62fab50) at vl.c:4539 When chardev is cleaned up, chr_write_lock needs to be destroyed. But the colo-compare module is not cleaned up normally before it when the guest poweroff. It is holding chr_write_lock at this time. This will cause qemu crash.So we add the function of colo_compare_cleanup() before qemu_chr_cleanup() to fix the bug. Signed-off-by: Lei Rao Reviewed-by: Zhang Chen Reviewed-by: Lukas Straub Tested-by: Lukas Straub Signed-off-by: Zhang Chen Signed-off-by: Jason Wang --- net/colo-compare.c | 10 ++++++++++ net/colo-compare.h | 1 + net/net.c | 4 ++++ 3 files changed, 15 insertions(+) diff --git a/net/colo-compare.c b/net/colo-compare.c index c142c08dc6a7..5b538f4e0b03 100644 --- a/net/colo-compare.c +++ b/net/colo-compare.c @@ -1402,6 +1402,16 @@ static void colo_compare_init(Object *obj) compare_set_vnet_hdr); } +void colo_compare_cleanup(void) +{ + CompareState *tmp = NULL; + CompareState *n = NULL; + + QTAILQ_FOREACH_SAFE(tmp, &net_compares, next, n) { + object_unparent(OBJECT(tmp)); + } +} + static void colo_compare_finalize(Object *obj) { CompareState *s = COLO_COMPARE(obj); diff --git a/net/colo-compare.h b/net/colo-compare.h index 22ddd512e277..b055270da2ce 100644 --- a/net/colo-compare.h +++ b/net/colo-compare.h @@ -20,5 +20,6 @@ void colo_notify_compares_event(void *opaque, int event, Error **errp); void colo_compare_register_notifier(Notifier *notify); void colo_compare_unregister_notifier(Notifier *notify); +void colo_compare_cleanup(void); #endif /* QEMU_COLO_COMPARE_H */ diff --git a/net/net.c b/net/net.c index 2a472604ecec..76bbb7c31b49 100644 --- a/net/net.c +++ b/net/net.c @@ -52,6 +52,7 @@ #include "qapi/error.h" #include "qapi/opts-visitor.h" #include "sysemu/runstate.h" +#include "net/colo-compare.h" #include "net/filter.h" #include "qapi/string-output-visitor.h" @@ -1402,6 +1403,9 @@ void net_cleanup(void) { NetClientState *nc; + /*cleanup colo compare module for COLO*/ + colo_compare_cleanup(); + /* We may del multiple entries during qemu_del_net_client(), * so QTAILQ_FOREACH_SAFE() is also not safe here. */