ERROR: (device loop7): diAllocBit: iag inconsistent
ERROR: (device loop7): remounting filesystem as read-only
ialloc: diAlloc returned -5!
BUG at fs/jfs/jfs_dmap.c:3021 assert(nb <= DBWORD)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_dmap.c:3021!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 13335 Comm: syz.7.840 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:dbFindBits+0x177/0x1a0 fs/jfs/jfs_dmap.c:3021
Code: e9 20 ff ff ff e8 c9 f7 77 fe 48 c7 c7 e0 58 6a 8b 48 c7 c6 20 56 6a 8b ba cd 0b 00 00 48 c7 c1 00 61 6a 8b e8 4a 3e dc fd 90 <0f> 0b e8 a2 f7 77 fe 48 c7 c7 e0 58 6a 8b 48 c7 c6 20 56 6a 8b ba
RSP: 0018:ffffc90004cafac0 EFLAGS: 00010246
RAX: 0000000000000032 RBX: 000000000000000a RCX: 06da8a156dee8100
RDX: ffffc900056e1000 RSI: 0000000000000ace RDI: 0000000000000acf
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000995f09 R12: 0000000000000000
R13: 000000000000000a R14: 0000000000000400 R15: ffff88806afdf000
FS:  00007febefd7e6c0(0000) GS:ffff888126695000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007febefd5dd58 CR3: 000000003b6dc000 CR4: 00000000003526f0
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
 dbDiscardAG+0x2da/0x8f0 fs/jfs/jfs_dmap.c:1608
 jfs_ioc_trim+0x429/0x690 fs/jfs/jfs_discard.c:106
 jfs_ioctl+0x291/0x3b0 fs/jfs/ioctl.c:131
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xff/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7febf1b2bf79
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:00007febefd7e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007febf1da5fa0 RCX: 00007febf1b2bf79
RDX: 0000200000000040 RSI: 00000000c0185879 RDI: 0000000000000005
RBP: 00007febf1bc27e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007febf1da6038 R14: 00007febf1da5fa0 R15: 00007ffdb8b763a8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dbFindBits+0x177/0x1a0 fs/jfs/jfs_dmap.c:3021
Code: e9 20 ff ff ff e8 c9 f7 77 fe 48 c7 c7 e0 58 6a 8b 48 c7 c6 20 56 6a 8b ba cd 0b 00 00 48 c7 c1 00 61 6a 8b e8 4a 3e dc fd 90 <0f> 0b e8 a2 f7 77 fe 48 c7 c7 e0 58 6a 8b 48 c7 c6 20 56 6a 8b ba
RSP: 0018:ffffc90004cafac0 EFLAGS: 00010246
RAX: 0000000000000032 RBX: 000000000000000a RCX: 06da8a156dee8100
RDX: ffffc900056e1000 RSI: 0000000000000ace RDI: 0000000000000acf
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000995f09 R12: 0000000000000000
R13: 000000000000000a R14: 0000000000000400 R15: ffff88806afdf000
FS:  00007febefd7e6c0(0000) GS:ffff888126695000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007febefd5dd58 CR3: 000000003b6dc000 CR4: 00000000003526f0