mirror of https://github.com/xemu-project/xemu.git
e2c5093c99
I reproduced the following crash fast enough:
0 raise () at /lib64/libc.so.6
1 abort () at /lib64/libc.so.6
2 _nl_load_domain.cold () at /lib64/libc.so.6
3 annobin_assert.c_end () at /lib64/libc.so.6
4 bdrv_reopen_multiple (bs_queue=0x55de75fa9b70, errp=0x0)
at ../block.c:3820
5 bdrv_reopen_set_read_only (bs=0x55de760fc020, read_only=true,
errp=0x0) at ../block.c:3870
6 stream_clean (job=0x55de75fa9410) at ../block/stream.c:99
7 job_clean (job=0x55de75fa9410) at ../job.c:680
8 job_finalize_single (job=0x55de75fa9410) at ../job.c:696
9 job_txn_apply (job=0x55de75fa9410,
fn=0x55de741eee27 <job_finalize_single>) at ../job.c:158
10 job_do_finalize (job=0x55de75fa9410) at ../job.c:805
11 job_completed_txn_success (job=0x55de75fa9410) at ../job.c:855
12 job_completed (job=0x55de75fa9410) at ../job.c:868
13 job_exit (opaque=0x55de75fa9410) at ../job.c:888
14 aio_bh_call (bh=0x55de76b9b4e0) at ../util/async.c:136
15 aio_bh_poll (ctx=0x55de75bc5300) at ../util/async.c:164
16 aio_dispatch (ctx=0x55de75bc5300) at ../util/aio-posix.c:381
17 aio_ctx_dispatch (source=0x55de75bc5300, callback=0x0,
user_data=0x0) at ../util/async.c:306
18 g_main_context_dispatch () at /lib64/libglib-2.0.so.0
19 glib_pollfds_poll () at ../util/main-loop.c:232
20 os_host_main_loop_wait (timeout=0) at ../util/main-loop.c:255
21 main_loop_wait (nonblocking=0) at ../util/main-loop.c:531
22 qemu_main_loop () at ../softmmu/runstate.c:722
23 main (argc=20, argv=0x7ffe218f0268, envp=0x7ffe218f0310) at
../softmmu/main.c:50
(gdb) fr 4
4 bdrv_reopen_multiple (bs_queue=0x55de75fa9b70, errp=0x0) at
../block.c:3820
3820 assert(perm == state->perm);
(gdb) list
3815
3816 if (ret == 0) {
3817 uint64_t perm, shared;
3818
3819 bdrv_get_cumulative_perm(state->bs, &perm,
&shared);
3820 assert(perm == state->perm);
3821 assert(shared == state->shared_perm);
3822
3823 bdrv_set_perm(state->bs);
3824 } else {
(gdb) p perm
$1 = 1
(gdb) p state->perm
$2 = 0
Then I had 38 successful iterations and another crash:
0 bdrv_check_update_perm (bs=0x5631ac97bc50, q=0x0, new_used_perm=1,
new_shared_perm=31, ignore_children=0x0, errp=0x7ffd9d477cf8) at
../block.c:2197
1 bdrv_root_attach_child
(child_bs=0x5631ac97bc50, child_name=0x5631aaf6b1f9 "backing",
child_class=0x5631ab280ca0 <child_of_bds>, child_role=8,
ctx=0x5631ab757300, perm=1, shared_perm=31, opaque=0x5631abb8c020,
errp=0x7ffd9d477cf8)
at ../block.c:2642
2 bdrv_attach_child (parent_bs=0x5631abb8c020,
child_bs=0x5631ac97bc50, child_name=0x5631aaf6b1f9 "backing",
child_class=0x5631ab280ca0 <child_of_bds>, child_role=8,
errp=0x7ffd9d477cf8)
at ../block.c:2719
3 bdrv_set_backing_hd (bs=0x5631abb8c020, backing_hd=0x5631ac97bc50,
errp=0x7ffd9d477cf8) at ../block.c:2854
4 stream_prepare (job=0x5631ac751eb0) at ../block/stream.c:74
5 job_prepare (job=0x5631ac751eb0) at ../job.c:784
6 job_txn_apply (job=0x5631ac751eb0, fn=0x5631aacb1156 <job_prepare>)
at ../job.c:158
7 job_do_finalize (job=0x5631ac751eb0) at ../job.c:801
8 job_completed_txn_success (job=0x5631ac751eb0) at ../job.c:855
9 job_completed (job=0x5631ac751eb0) at ../job.c:868
10 job_exit (opaque=0x5631ac751eb0) at ../job.c:888
11 aio_bh_call (bh=0x7f3d9c007680) at ../util/async.c:136
12 aio_bh_poll (ctx=0x5631ab757300) at ../util/async.c:164
13 aio_dispatch (ctx=0x5631ab757300) at ../util/aio-posix.c:381
14 aio_ctx_dispatch (source=0x5631ab757300, callback=0x0,
user_data=0x0) at ../util/async.c:306
15 g_main_context_dispatch () at /lib64/libglib-2.0.so.0
16 glib_pollfds_poll () at ../util/main-loop.c:232
17 os_host_main_loop_wait (timeout=0) at ../util/main-loop.c:255
18 main_loop_wait (nonblocking=0) at ../util/main-loop.c:531
19 qemu_main_loop () at ../softmmu/runstate.c:722
20 main (argc=20, argv=0x7ffd9d478198, envp=0x7ffd9d478240) at
../softmmu/main.c:50
(gdb) list
2192 QLIST_FOREACH(c, &bs->parents, next_parent) {
2193 if (g_slist_find(ignore_children, c)) {
2194 continue;
2195 }
2196
2197 if ((new_used_perm & c->shared_perm) != new_used_perm)
{
2198 char *user = bdrv_child_user_desc(c);
2199 char *perm_names = bdrv_perm_names(new_used_perm &
~c->shared_perm);
2200
2201 error_setg(errp, "Conflicts with use by %s as '%s',
which does not "
(gdb) p c
$1 = (BdrvChild *) 0x8585858585858585
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-id: 20210205111021.715240-1-vsementsov@virtuozzo.com
Reviewed-by: Eric Blake <eblake@redhat.com>
[PMM: trimmed the part of the commit message referring to
as-yet-unapplied patchseries]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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|---|---|---|
| .. | ||
| acceptance | ||
| data | ||
| decode | ||
| docker | ||
| fp | ||
| guest-debug | ||
| image-fuzzer | ||
| include | ||
| keys | ||
| migration | ||
| multiboot | ||
| perf/block/qcow2 | ||
| plugin | ||
| qapi-schema | ||
| qemu-iotests | ||
| qtest | ||
| rocker | ||
| tcg | ||
| tsan | ||
| uefi-test-tools | ||
| vm | ||
| vmstate-static-checker-data | ||
| Makefile.include | ||
| atomic64-bench.c | ||
| atomic_add-bench.c | ||
| benchmark-crypto-cipher.c | ||
| benchmark-crypto-hash.c | ||
| benchmark-crypto-hmac.c | ||
| check-block-qdict.c | ||
| check-block.sh | ||
| check-qdict.c | ||
| check-qjson.c | ||
| check-qlist.c | ||
| check-qlit.c | ||
| check-qnull.c | ||
| check-qnum.c | ||
| check-qobject.c | ||
| check-qom-interface.c | ||
| check-qom-proplist.c | ||
| check-qstring.c | ||
| crypto-tls-psk-helpers.c | ||
| crypto-tls-psk-helpers.h | ||
| crypto-tls-x509-helpers.c | ||
| crypto-tls-x509-helpers.h | ||
| dbus-vmstate-daemon.sh | ||
| io-channel-helpers.c | ||
| io-channel-helpers.h | ||
| iothread.c | ||
| iothread.h | ||
| meson.build | ||
| pkix_asn1_tab.c | ||
| ptimer-test-stubs.c | ||
| ptimer-test.c | ||
| ptimer-test.h | ||
| qht-bench.c | ||
| rcutorture.c | ||
| requirements.txt | ||
| socket-helpers.c | ||
| socket-helpers.h | ||
| test-aio-multithread.c | ||
| test-aio.c | ||
| test-authz-list.c | ||
| test-authz-listfile.c | ||
| test-authz-pam.c | ||
| test-authz-simple.c | ||
| test-base64.c | ||
| test-bdrv-drain.c | ||
| test-bdrv-graph-mod.c | ||
| test-bitcnt.c | ||
| test-bitmap.c | ||
| test-bitops.c | ||
| test-block-backend.c | ||
| test-block-iothread.c | ||
| test-blockjob-txn.c | ||
| test-blockjob.c | ||
| test-bufferiszero.c | ||
| test-char.c | ||
| test-clone-visitor.c | ||
| test-coroutine.c | ||
| test-crypto-afsplit.c | ||
| test-crypto-block.c | ||
| test-crypto-cipher.c | ||
| test-crypto-hash.c | ||
| test-crypto-hmac.c | ||
| test-crypto-ivgen.c | ||
| test-crypto-pbkdf.c | ||
| test-crypto-secret.c | ||
| test-crypto-tlscredsx509.c | ||
| test-crypto-tlssession.c | ||
| test-crypto-xts.c | ||
| test-cutils.c | ||
| test-fdmon-epoll.c | ||
| test-hbitmap.c | ||
| test-image-locking.c | ||
| test-int128.c | ||
| test-io-channel-buffer.c | ||
| test-io-channel-command.c | ||
| test-io-channel-file.c | ||
| test-io-channel-socket.c | ||
| test-io-channel-tls.c | ||
| test-io-task.c | ||
| test-iov.c | ||
| test-keyval.c | ||
| test-logging.c | ||
| test-mul64.c | ||
| test-opts-visitor.c | ||
| test-qapi-util.c | ||
| test-qdev-global-props.c | ||
| test-qdist.c | ||
| test-qemu-opts.c | ||
| test-qga.c | ||
| test-qgraph.c | ||
| test-qht-par.c | ||
| test-qht.c | ||
| test-qmp-cmds.c | ||
| test-qmp-event.c | ||
| test-qobject-input-visitor.c | ||
| test-qobject-output-visitor.c | ||
| test-rcu-list.c | ||
| test-rcu-simpleq.c | ||
| test-rcu-slist.c | ||
| test-rcu-tailq.c | ||
| test-replication.c | ||
| test-shift128.c | ||
| test-string-input-visitor.c | ||
| test-string-output-visitor.c | ||
| test-thread-pool.c | ||
| test-throttle.c | ||
| test-timed-average.c | ||
| test-util-filemonitor.c | ||
| test-util-sockets.c | ||
| test-uuid.c | ||
| test-visitor-serialization.c | ||
| test-vmstate.c | ||
| test-write-threshold.c | ||
| test-x86-cpuid.c | ||
| test-xbzrle.c | ||
| vhost-user-bridge.c | ||