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qemu-io crashes with SIGABRT and Assertion `c->entries[i].offset != 0' failed
git is at HEAD a93ece47fd9edbd4558db24300056c9a57d3bcd4
This is on ppc64le architecture.
Re-production steps:
1. Copy the attached files named backing_img.file and test.img to a directory
2. And customize the following command to point to the above directory and run the same.
/usr/bin/qemu-io <path to>/test.img -c "write 1352192 1707520"
3.Output of the above command.
qemu-io: block/qcow2-cache.c:411: qcow2_cache_entry_mark_dirty: Assertion `c->entries[i].offset != 0' failed.
Aborted (core dumped)
from gdb:
(gdb) bt
#0 0x00003fff833eeff0 in raise () from /lib64/libc.so.6
#1 0x00003fff833f136c in abort () from /lib64/libc.so.6
#2 0x00003fff833e4c44 in __assert_fail_base () from /lib64/libc.so.6
#3 0x00003fff833e4d34 in __assert_fail () from /lib64/libc.so.6
#4 0x000000001006a594 in qcow2_cache_entry_mark_dirty (bs=0x2e886f60, c=0x2e879700, table=0x3fff81200000) at block/qcow2-cache.c:411
#5 0x0000000010056154 in alloc_refcount_block (bs=0x2e886f60, cluster_index=2, refcount_block=0x3fff80cff808) at block/qcow2-refcount.c:417
#6 0x0000000010057520 in update_refcount (bs=0x2e886f60, offset=1048576, length=524288, addend=1, decrease=false, type=QCOW2_DISCARD_NEVER)
at block/qcow2-refcount.c:834
#7 0x0000000010057dc8 in qcow2_alloc_clusters_at (bs=0x2e886f60, offset=1048576, nb_clusters=1) at block/qcow2-refcount.c:1032
#8 0x00000000100636d8 in do_alloc_cluster_offset (bs=0x2e886f60, guest_offset=2097152, host_offset=0x3fff80cff9e0, nb_clusters=0x3fff80cff9d8)
at block/qcow2-cluster.c:1221
#9 0x0000000010063afc in handle_alloc (bs=0x2e886f60, guest_offset=2097152, host_offset=0x3fff80cffab0, bytes=0x3fff80cffab8, m=0x3fff80cffb60)
at block/qcow2-cluster.c:1324
#10 0x0000000010064178 in qcow2_alloc_cluster_offset (bs=0x2e886f60, offset=1572864, bytes=0x3fff80cffb4c, host_offset=0x3fff80cffb58, m=0x3fff80cffb60)
at block/qcow2-cluster.c:1511
#11 0x000000001004d3f4 in qcow2_co_pwritev (bs=0x2e886f60, offset=1572864, bytes=1486848, qiov=0x3fffc85f0bf0, flags=0) at block/qcow2.c:1919
#12 0x00000000100a9648 in bdrv_driver_pwritev (bs=0x2e886f60, offset=1352192, bytes=1707520, qiov=0x3fffc85f0bf0, flags=16) at block/io.c:898
#13 0x00000000100ab630 in bdrv_aligned_pwritev (child=0x2e8927f0, req=0x3fff80cffdd8, offset=1352192, bytes=1707520, align=1, qiov=0x3fffc85f0bf0, flags=16)
at block/io.c:1440
#14 0x00000000100ac4ac in bdrv_co_pwritev (child=0x2e8927f0, offset=1352192, bytes=1707520, qiov=0x3fffc85f0bf0, flags=BDRV_REQ_FUA) at block/io.c:1691
#15 0x000000001008da0c in blk_co_pwritev (blk=0x2e879410, offset=1352192, bytes=1707520, qiov=0x3fffc85f0bf0, flags=BDRV_REQ_FUA) at block/block-backend.c:1085
#16 0x000000001008db68 in blk_write_entry (opaque=0x3fffc85f0c08) at block/block-backend.c:1110
#17 0x00000000101aa444 in coroutine_trampoline (i0=780753552, i1=0) at util/coroutine-ucontext.c:79
#18 0x00003fff83402b9c in makecontext () from /lib64/libc.so.6
#19 0x0000000000000000 in ?? ()
(gdb) bt full
#0 0x00003fff833eeff0 in raise () from /lib64/libc.so.6
No symbol table info available.
#1 0x00003fff833f136c in abort () from /lib64/libc.so.6
No symbol table info available.
#2 0x00003fff833e4c44 in __assert_fail_base () from /lib64/libc.so.6
No symbol table info available.
#3 0x00003fff833e4d34 in __assert_fail () from /lib64/libc.so.6
No symbol table info available.
#4 0x000000001006a594 in qcow2_cache_entry_mark_dirty (bs=0x2e886f60, c=0x2e879700, table=0x3fff81200000) at block/qcow2-cache.c:411
i = 0
__PRETTY_FUNCTION__ = "qcow2_cache_entry_mark_dirty"
#5 0x0000000010056154 in alloc_refcount_block (bs=0x2e886f60, cluster_index=2, refcount_block=0x3fff80cff808) at block/qcow2-refcount.c:417
s = 0x2e893210
refcount_table_index = 0
ret = 0
new_block = 0
blocks_used = 72057594818669408
meta_offset = 1572863
#6 0x0000000010057520 in update_refcount (bs=0x2e886f60, offset=1048576, length=524288, addend=1, decrease=false, type=QCOW2_DISCARD_NEVER)
at block/qcow2-refcount.c:834
block_index = 268870408
refcount = 780741808
cluster_index = 2
table_index = 0
s = 0x2e893210
start = 1048576
last = 1048576
cluster_offset = 1048576
refcount_block = 0x3fff81200000
old_table_index = -1
ret = 16383
#7 0x0000000010057dc8 in qcow2_alloc_clusters_at (bs=0x2e886f60, offset=1048576, nb_clusters=1) at block/qcow2-refcount.c:1032
s = 0x2e893210
cluster_index = 3
refcount = 0
i = 1
ret = 0
__PRETTY_FUNCTION__ = "qcow2_alloc_clusters_at"
#8 0x00000000100636d8 in do_alloc_cluster_offset (bs=0x2e886f60, guest_offset=2097152, host_offset=0x3fff80cff9e0, nb_clusters=0x3fff80cff9d8)
at block/qcow2-cluster.c:1221
ret = 780743184
s = 0x2e893210
#9 0x0000000010063afc in handle_alloc (bs=0x2e886f60, guest_offset=2097152, host_offset=0x3fff80cffab0, bytes=0x3fff80cffab8, m=0x3fff80cffb60)
at block/qcow2-cluster.c:1324
s = 0x2e893210
l2_index = 4
l2_table = 0x0
entry = 0
nb_clusters = 1
ret = 0
---Type <return> to continue, or q <return> to quit---
keep_old_clusters = false
alloc_cluster_offset = 1048576
__PRETTY_FUNCTION__ = "handle_alloc"
requested_bytes = 17960562528
avail_bytes = -2133853344
nb_bytes = 16383
old_m = 0x100000000
#10 0x0000000010064178 in qcow2_alloc_cluster_offset (bs=0x2e886f60, offset=1572864, bytes=0x3fff80cffb4c, host_offset=0x3fff80cffb58, m=0x3fff80cffb60)
at block/qcow2-cluster.c:1511
s = 0x2e893210
start = 2097152
remaining = 962560
cluster_offset = 1048576
cur_bytes = 962560
ret = 0
__PRETTY_FUNCTION__ = "qcow2_alloc_cluster_offset"
#11 0x000000001004d3f4 in qcow2_co_pwritev (bs=0x2e886f60, offset=1572864, bytes=1486848, qiov=0x3fffc85f0bf0, flags=0) at block/qcow2.c:1919
s = 0x2e893210
offset_in_cluster = 0
ret = 0
cur_bytes = 1486848
cluster_offset = 524288
hd_qiov = {iov = 0x2e858660, niov = 1, nalloc = 1, size = 220672}
bytes_done = 220672
cluster_data = 0x0
l2meta = 0x0
__PRETTY_FUNCTION__ = "qcow2_co_pwritev"
#12 0x00000000100a9648 in bdrv_driver_pwritev (bs=0x2e886f60, offset=1352192, bytes=1707520, qiov=0x3fffc85f0bf0, flags=16) at block/io.c:898
drv = 0x102036f0 <bdrv_qcow2>
sector_num = 780706080
nb_sectors = 3069122264
ret = -203160320
__PRETTY_FUNCTION__ = "bdrv_driver_pwritev"
#13 0x00000000100ab630 in bdrv_aligned_pwritev (child=0x2e8927f0, req=0x3fff80cffdd8, offset=1352192, bytes=1707520, align=1, qiov=0x3fffc85f0bf0, flags=16)
at block/io.c:1440
bs = 0x2e886f60
drv = 0x102036f0 <bdrv_qcow2>
waited = false
ret = 0
end_sector = 5976
bytes_remaining = 1707520
max_transfer = 2147483647
__PRETTY_FUNCTION__ = "bdrv_aligned_pwritev"
#14 0x00000000100ac4ac in bdrv_co_pwritev (child=0x2e8927f0, offset=1352192, bytes=1707520, qiov=0x3fffc85f0bf0, flags=BDRV_REQ_FUA) at block/io.c:1691
bs = 0x2e886f60
req = {bs = 0x2e886f60, offset = 1352192, bytes = 1707520, type = BDRV_TRACKED_WRITE, serialising = false, overlap_offset = 1352192,
overlap_bytes = 1707520, list = {le_next = 0x0, le_prev = 0x2e88a1d8}, co = 0x2e895a90, wait_queue = {entries = {sqh_first = 0x0,
sqh_last = 0x3fff80cffe20}}, waiting_for = 0x0}
align = 1
head_buf = 0x0
---Type <return> to continue, or q <return> to quit---
tail_buf = 0x0
local_qiov = {iov = 0x3fff80cffdb0, niov = -2133852688, nalloc = 16383, size = 1352192}
use_local_qiov = false
ret = 0
__PRETTY_FUNCTION__ = "bdrv_co_pwritev"
#15 0x000000001008da0c in blk_co_pwritev (blk=0x2e879410, offset=1352192, bytes=1707520, qiov=0x3fffc85f0bf0, flags=BDRV_REQ_FUA) at block/block-backend.c:1085
ret = 0
bs = 0x2e886f60
#16 0x000000001008db68 in blk_write_entry (opaque=0x3fffc85f0c08) at block/block-backend.c:1110
rwco = 0x3fffc85f0c08
#17 0x00000000101aa444 in coroutine_trampoline (i0=780753552, i1=0) at util/coroutine-ucontext.c:79
arg = {p = 0x2e895a90, i = {780753552, 0}}
self = 0x2e895a90
co = 0x2e895a90
#18 0x00003fff83402b9c in makecontext () from /lib64/libc.so.6
No symbol table info available.
#19 0x0000000000000000 in ?? ()
No symbol table info available.
Will attach the 'image_fuzzer' images.
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