diff options
Diffstat (limited to 'gitlab/issues_text/target_missing/host_missing/accel_missing/2265')
| -rw-r--r-- | gitlab/issues_text/target_missing/host_missing/accel_missing/2265 | 48 |
1 files changed, 0 insertions, 48 deletions
diff --git a/gitlab/issues_text/target_missing/host_missing/accel_missing/2265 b/gitlab/issues_text/target_missing/host_missing/accel_missing/2265 deleted file mode 100644 index c70544c1b..000000000 --- a/gitlab/issues_text/target_missing/host_missing/accel_missing/2265 +++ /dev/null @@ -1,48 +0,0 @@ -qemu-system-x86_64 crash creating snapshot -Description of problem: -I'm facing a crash in qemu-system-x86_64.\ -I crash because bs->children.lh_first is null and QLIST_NEXT try dereference the pointer. It triggers a SIGSEGV\ -The manner to reproduce is too complex to give on gitlab and the version is not recent. (I reproduce also with 7.1)\ - -here is the stack: - -(gdb) p bs->children\ -$1 = {lh_first = 0x0}\ -(gdb)\ -(gdb) p child\ -$2 = (BdrvChild *) 0x0\ -(gdb)\ - if (bs->implicit) {\ - /* For implicit nodes, just copy everything from the single child */\ - child = QLIST_FIRST(&bs->children);\ ------>> assert(QLIST_NEXT(child, next) == NULL);\ - pstrcpy(bs->exact_filename, sizeof(bs->exact_filename),\ - - -#0 bdrv_refresh_filename (bs=0x562927927000) at ../qemu-6.2.0/block.c:7525\ -#1 0x000056292527dd97 in bdrv_block_device_info (blk=blk@entry=0x0, bs=bs@entry=0x562927927000, flat=flat@entry=true, errp=errp@entry=0x7ffcef7e8318) at ../qemu-6.2.0/block/qapi.c:58\ -#2 0x00005629252470c0 in bdrv_named_nodes_list (flat=true, errp=errp@entry=0x7ffcef7e8318) at ../qemu-6.2.0/block.c:5863\ -#3 0x000056292523da7e in qmp_query_named_block_nodes (has_flat=<optimized out>, flat=<optimized out>, errp=errp@entry=0x7ffcef7e8318) at ../qemu-6.2.0/blockdev.c:2935\ -#4 0x0000562925301ebd in qmp_marshal_query_named_block_nodes (args=<optimized out>, ret=0x7fc833c83e88, errp=0x7fc833c83e80) at qapi/qapi-commands-block-core.c:423\ -#5 0x0000562925344129 in do_qmp_dispatch_bh (opaque=0x7fc833c83e90) at ../qemu-6.2.0/qapi/qmp-dispatch.c:129 -#6 0x000056292535ecf5 in aio_bh_call (bh=0x5629295ab560) at ../qemu-6.2.0/util/async.c:141\ -#7 aio_bh_poll (ctx=ctx@entry=0x5629276c93e0) at ../qemu-6.2.0/util/async.c:169\ -#8 0x000056292534cf9e in aio_dispatch (ctx=0x5629276c93e0) at ../qemu-6.2.0/util/aio-posix.c:381\ -#9 0x000056292535eb9e in aio_ctx_dispatch (source=<optimized out>, callback=<optimized out>, user_data=<optimized out>) at ../qemu-6.2.0/util/async.c:311\ -#10 0x00007fc8351cafee in g_match_info_fetch_pos () from /lib/x86_64-linux-gnu/libglib-2.0.so.0\ -#11 0x00007fc800000000 in ?? ()\ -#12 0x000003a05cb8b408 in ?? ()\ -#13 0x0000000000000000 in ?? ()\ - -The case lh_first = 0x0 seems to be common, but never when bs->implicit is true. bs->implicit seems to be switch to true by another thread.\ -Because the qemu version and the system are too old, I'm not expecting a patch, I'm just requesting an opinion.\ - -I fixed the problem by just doing:\ -child = QLIST_FIRST(&bs->children);\ -if (bs->implicit && (child != NULL)) {\ - assert(QLIST_NEXT(child, next) == NULL);\ - ....\ -}\ -I don't have the qemu knowledge to evaluate it and consequences.\ -Is there anyone who have any idea ?\ -Thank you very much.\ |