loop0: detected capacity change from 0 to 32768

 ... Log Wrap ... Log Wrap ... Log Wrap ...

9p: Bad value for 'rfdno'
BUG at fs/jfs/jfs_dmap.c:3123 assert(bitno < 32)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_dmap.c:3123!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5317 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 04/01/2014
RIP: 0010:dbFindBits+0x19e/0x1a0 fs/jfs/jfs_dmap.c:3123
Code: bf fd 90 0f 0b e8 62 9c 5e fe 48 c7 c7 e0 59 2c 8c 48 c7 c6 20 57 2c 8c ba 33 0c 00 00 48 c7 c1 20 62 2c 8c e8 03 37 bf 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:ffffc9000f38ec38 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: d6997c8159d25c00
RDX: ffffc9000f631000 RSI: 000000000006d19b RDI: 000000000006d19c
RBP: 00000000ffffffff R08: ffffc9000f38e9c7 R09: 1ffff92001e71d38
R10: dffffc0000000000 R11: fffff52001e71d39 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007f71ba4e66c0(0000) GS:ffff88808c53f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f71ba4c4fe8 CR3: 00000000446af000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 dbAllocDmapLev+0x161/0x3b0 fs/jfs/jfs_dmap.c:2072
 dbAllocCtl+0x145/0x990 fs/jfs/jfs_dmap.c:1912
 dbAllocAG+0x1f4/0xf80 fs/jfs/jfs_dmap.c:1440
 dbAlloc+0x5ab/0xba0 fs/jfs/jfs_dmap.c:964
 xtSplitUp+0x4bf/0x1ef0 fs/jfs/jfs_xtree.c:760
 xtInsert+0x43e/0xf10 fs/jfs/jfs_xtree.c:608
 extAlloc+0xac6/0x1010 fs/jfs/jfs_extent.c:150
 jfs_get_block+0x351/0xad0 fs/jfs/inode.c:254
 get_more_blocks fs/direct-io.c:644 [inline]
 do_direct_IO fs/direct-io.c:932 [inline]
 __blockdev_direct_IO+0x1590/0x3380 fs/direct-io.c:1236
 blockdev_direct_IO include/linux/fs.h:3135 [inline]
 jfs_direct_IO+0x119/0x220 fs/jfs/inode.c:339
 generic_file_direct_write+0x1d0/0x3f0 mm/filemap.c:4292
 __generic_file_write_iter+0x11d/0x230 mm/filemap.c:4461
 generic_file_write_iter+0xae/0x330 mm/filemap.c:4501
 do_iter_readv_writev+0x612/0x8c0 fs/read_write.c:-1
 vfs_writev+0x343/0x990 fs/read_write.c:1058
 do_pwritev fs/read_write.c:1154 [inline]
 __do_sys_pwritev2 fs/read_write.c:1212 [inline]
 __se_sys_pwritev2+0x177/0x2a0 fs/read_write.c:1203
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f71b959e019
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f71ba4e5fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007f71b9826090 RCX: 00007f71b959e019
RDX: 0000000000000001 RSI: 0000200000000240 RDI: 0000000000000006
RBP: 00007f71b963500c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000007800 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f71b9826128 R14: 00007f71b9826090 R15: 00007ffd1197c6f8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dbFindBits+0x19e/0x1a0 fs/jfs/jfs_dmap.c:3123
Code: bf fd 90 0f 0b e8 62 9c 5e fe 48 c7 c7 e0 59 2c 8c 48 c7 c6 20 57 2c 8c ba 33 0c 00 00 48 c7 c1 20 62 2c 8c e8 03 37 bf 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:ffffc9000f38ec38 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: d6997c8159d25c00
RDX: ffffc9000f631000 RSI: 000000000006d19b RDI: 000000000006d19c
RBP: 00000000ffffffff R08: ffffc9000f38e9c7 R09: 1ffff92001e71d38
R10: dffffc0000000000 R11: fffff52001e71d39 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007f71ba4e66c0(0000) GS:ffff88808c53f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f79bea93b50 CR3: 00000000446af000 CR4: 0000000000352ef0