/dev/loop1: Can't open blockdev
------------[ cut here ]------------
lp >= size || lp < 0
WARNING: fs/jfs/jfs_dmap.c:2875 at dbAdjTree+0x454/0x4e0 fs/jfs/jfs_dmap.c:2875, CPU#0: syz.1.688/11562
Modules linked in:
CPU: 0 UID: 0 PID: 11562 Comm: syz.1.688 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:dbAdjTree+0x454/0x4e0 fs/jfs/jfs_dmap.c:2875
Code: 5a ff ff ff e8 cd 4e 79 fe eb 05 e8 c6 4e 79 fe 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 ad 4e 79 fe 90 <0f> 0b 90 eb e1 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c e1 fb ff ff
RSP: 0018:ffffc9000cb671a8 EFLAGS: 00010293
RAX: ffffffff8349e5c3 RBX: ffff88806e5b6010 RCX: ffff88802fbbdac0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000020056 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff94000372db1 R12: ffff88806e5b6018
R13: dffffc0000000000 R14: 0000000000000004 R15: 0000000000000155
FS:  0000000000000000(0000) GS:ffff8881265c9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd9f4cdfe9c CR3: 00000000287d4000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 dbJoin+0x238/0x300 fs/jfs/jfs_dmap.c:2843
 dbFreeBits+0x4e1/0xdb0 fs/jfs/jfs_dmap.c:2340
 dbFreeDmap fs/jfs/jfs_dmap.c:2089 [inline]
 dbFree+0x336/0x650 fs/jfs/jfs_dmap.c:398
 txFreeMap+0x9e6/0xde0 fs/jfs/jfs_txnmgr.c:2516
 xtTruncate+0xd38/0x2f20 fs/jfs/jfs_xtree.c:2481
 jfs_free_zero_link+0x35b/0x4c0 fs/jfs/namei.c:759
 jfs_evict_inode+0x363/0x440 fs/jfs/inode.c:159
 evict+0x61e/0xb10 fs/inode.c:837
 __dentry_kill+0x1a2/0x5e0 fs/dcache.c:670
 finish_dput+0xc9/0x480 fs/dcache.c:879
 __fput+0x6a0/0xa80 fs/file_table.c:476
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x69b/0x2320 kernel/exit.c:971
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1112
 get_signal+0x125c/0x1310 kernel/signal.c:3034
 arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x86/0x480 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x2b7/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f94beccb78e
Code: Unable to access opcode bytes at 0x7f94beccb764.
RSP: 002b:00007f94bcf65da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: 00000000003b2000 RBX: 00007f94bcf666c0 RCX: 00007f94beccb78e
RDX: 0000000001000000 RSI: 00007f94b4b25000 RDI: 000000000000000a
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000a
R13: 00007f94bcf65ee0 R14: 00007f94bcf65ea0 R15: 00007f94b4b25000
 </TASK>