loop0: detected capacity change from 0 to 32768
 ... Log Wrap ... Log Wrap ... Log Wrap ...
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: 5359 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: e7 fd 90 0f 0b e8 d2 58 7f fe 48 c7 c7 c0 f3 c3 8b 48 c7 c6 00 f1 c3 8b ba dc 0b 00 00 48 c7 c1 a0 fb c3 8b e8 13 2a e7 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:ffffc9000d5ef510 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: 8be7983548f18900
RDX: ffffc9000dfa2000 RSI: 00000000000008ba RDI: 00000000000008bb
RBP: 00000000ffffffff R08: ffffc9000d5ef227 R09: 1ffff92001abde44
R10: dffffc0000000000 R11: fffff52001abde45 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007f9fb5edd6c0(0000) GS:ffff88808d20a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9fa8e7f000 CR3: 00000000343d8000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 dbAllocNear+0x244/0x3d0 fs/jfs/jfs_dmap.c:1243
 dbAlloc+0x933/0xba0 fs/jfs/jfs_dmap.c:832
 ea_get+0x98b/0x1330 fs/jfs/xattr.c:516
 __jfs_setxattr+0x57c/0x1120 fs/jfs/xattr.c:727
 __jfs_xattr_set+0xda/0x170 fs/jfs/xattr.c:941
 __vfs_setxattr+0x43c/0x480 fs/xattr.c:200
 __vfs_setxattr_noperm+0x12d/0x660 fs/xattr.c:234
 vfs_setxattr+0x16b/0x2f0 fs/xattr.c:321
 do_setxattr fs/xattr.c:636 [inline]
 filename_setxattr+0x274/0x600 fs/xattr.c:665
 path_setxattrat+0x364/0x3a0 fs/xattr.c:713
 __do_sys_lsetxattr fs/xattr.c:754 [inline]
 __se_sys_lsetxattr fs/xattr.c:750 [inline]
 __x64_sys_lsetxattr+0xbf/0xe0 fs/xattr.c:750
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9fb4f8eba9
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:00007f9fb5edd038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd
RAX: ffffffffffffffda RBX: 00007f9fb51d5fa0 RCX: 00007f9fb4f8eba9
RDX: 00002000000003c0 RSI: 00002000000002c0 RDI: 0000200000000100
RBP: 00007f9fb5011e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000361 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9fb51d6038 R14: 00007f9fb51d5fa0 R15: 00007ffc922d06b8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dbFindBits+0x19e/0x1a0 fs/jfs/jfs_dmap.c:3036
Code: e7 fd 90 0f 0b e8 d2 58 7f fe 48 c7 c7 c0 f3 c3 8b 48 c7 c6 00 f1 c3 8b ba dc 0b 00 00 48 c7 c1 a0 fb c3 8b e8 13 2a e7 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:ffffc9000d5ef510 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: 8be7983548f18900
RDX: ffffc9000dfa2000 RSI: 00000000000008ba RDI: 00000000000008bb
RBP: 00000000ffffffff R08: ffffc9000d5ef227 R09: 1ffff92001abde44
R10: dffffc0000000000 R11: fffff52001abde45 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007f9fb5edd6c0(0000) GS:ffff88808d20a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9fa8e7f000 CR3: 00000000343d8000 CR4: 0000000000352ef0