loop0: detected capacity change from 0 to 4096
nilfs2: Unknown parameter '01777777777777777777777'
loop0: detected capacity change from 0 to 32768
jfs_strtoUCS: char2uni returned -22.
charset = cp857, char = 0xd5
BUG at fs/jfs/jfs_dmap.c:3036 assert(bitno < 32)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_dmap.c:3036!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5340 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:dbFindBits+0x19e/0x1a0 fs/jfs/jfs_dmap.c:3036
Code: de fd 90 0f 0b e8 92 9e 77 fe 48 c7 c7 e0 63 a5 8b 48 c7 c6 20 61 a5 8b ba dc 0b 00 00 48 c7 c1 e0 6b a5 8b e8 a3 3f de fd 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41
RSP: 0018:ffffc9000a8a7568 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: 50364414a8cf1300
RDX: ffffc90020802000 RSI: 0000000000001d39 RDI: 0000000000001d3a
RBP: 00000000ffffffff R08: ffffc9000a8a72e7 R09: 1ffff92001514e5c
R10: dffffc0000000000 R11: fffff52001514e5d R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007fa9393726c0(0000) GS:ffff88808d416000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f01d7b51090 CR3: 0000000011179000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 dbAllocDmapLev+0x16b/0x3c0 fs/jfs/jfs_dmap.c:1985
 dbAllocCtl+0x14a/0x9c0 fs/jfs/jfs_dmap.c:1825
 dbAllocAG+0x1e6/0xff0 fs/jfs/jfs_dmap.c:1353
 dbAlloc+0x5a8/0xba0 fs/jfs/jfs_dmap.c:877
 dtSplitUp fs/jfs/jfs_dtree.c:982 [inline]
 dtInsert+0xad5/0x5f40 fs/jfs/jfs_dtree.c:871
 jfs_link+0x312/0x550 fs/jfs/namei.c:826
 vfs_link+0x518/0x6e0 fs/namei.c:5646
 do_linkat+0x283/0x5a0 fs/namei.c:5716
 __do_sys_link fs/namei.c:5750 [inline]
 __se_sys_link fs/namei.c:5748 [inline]
 __x64_sys_link+0x82/0x90 fs/namei.c:5748
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa93858f7c9
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:00007fa939372038 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
RAX: ffffffffffffffda RBX: 00007fa9387e5fa0 RCX: 00007fa93858f7c9
RDX: 0000000000000000 RSI: 0000200000000bc0 RDI: 0000200000001240
RBP: 00007fa938613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa9387e6038 R14: 00007fa9387e5fa0 R15: 00007ffd2ea7f4e8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dbFindBits+0x19e/0x1a0 fs/jfs/jfs_dmap.c:3036
Code: de fd 90 0f 0b e8 92 9e 77 fe 48 c7 c7 e0 63 a5 8b 48 c7 c6 20 61 a5 8b ba dc 0b 00 00 48 c7 c1 e0 6b a5 8b e8 a3 3f de fd 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41
RSP: 0018:ffffc9000a8a7568 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: 50364414a8cf1300
RDX: ffffc90020802000 RSI: 0000000000001d39 RDI: 0000000000001d3a
RBP: 00000000ffffffff R08: ffffc9000a8a72e7 R09: 1ffff92001514e5c
R10: dffffc0000000000 R11: fffff52001514e5d R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007fa9393726c0(0000) GS:ffff88808d416000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f22a9ea7407 CR3: 0000000011179000 CR4: 0000000000352ef0