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loop0: detected capacity change from 0 to 32768
loop0: detected capacity change from 32768 to 32639
ERROR: (device loop0): dbAllocNext: Corrupt dmap page
------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dmap.c:2260:2
index 2048 is out of range for type 's64[128]' (aka 'long long[128]')
CPU: 0 UID: 0 PID: 5329 Comm: syz.0.0 Not tainted 6.14.0-rc5-syzkaller-00268-g1110ce6a1e34 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 ubsan_epilogue lib/ubsan.c:231 [inline]
 __ubsan_handle_out_of_bounds+0x121/0x150 lib/ubsan.c:429
 dbAllocBits+0x994/0x9c0 fs/jfs/jfs_dmap.c:2260
 dbAllocDmap fs/jfs/jfs_dmap.c:2037 [inline]
 dbAllocDmapLev+0x250/0x4a0 fs/jfs/jfs_dmap.c:1991
 dbAllocCtl+0x147/0x9b0 fs/jfs/jfs_dmap.c:1828
 dbAllocAG+0x28f/0x10b0 fs/jfs/jfs_dmap.c:1364
 dbAlloc+0x658/0xca0 fs/jfs/jfs_dmap.c:888
 dtSplitUp fs/jfs/jfs_dtree.c:981 [inline]
 dtInsert+0xd89/0x6d10 fs/jfs/jfs_dtree.c:870
 jfs_create+0x7ba/0xbb0 fs/jfs/namei.c:137
 vfs_create+0x23c/0x3d0 fs/namei.c:3350
 do_mknodat+0x447/0x5b0 fs/namei.c:4241
 __do_sys_mknod fs/namei.c:4274 [inline]
 __se_sys_mknod fs/namei.c:4272 [inline]
 __x64_sys_mknod+0x8c/0xa0 fs/namei.c:4272
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f516f78d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f517053d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000085
RAX: ffffffffffffffda RBX: 00007f516f9a5fa0 RCX: 00007f516f78d169
RDX: 0000000000000701 RSI: 0000000000000800 RDI: 0000400000000500
RBP: 00007f516f80e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f516f9a5fa0 R15: 00007fff66c91138
 </TASK>
---[ end trace ]---