loop0: detected capacity change from 0 to 32768
find_entry called with index >= next_index
find_entry called with index >= next_index
find_entry called with index >= next_index
add_index: next_index = 0.  Resetting!
find_entry called with index >= next_index
find_entry called with index >= next_index
------------[ cut here ]------------
UBSAN: shift-out-of-bounds in fs/jfs/jfs_dmap.c:2641:11
shift exponent 34 is too large for 32-bit type 'int'
CPU: 0 UID: 0 PID: 5358 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
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 ubsan_epilogue+0xa/0x40 lib/ubsan.c:233
 __ubsan_handle_shift_out_of_bounds+0x386/0x410 lib/ubsan.c:494
 dbSplit+0x1f8/0x200 fs/jfs/jfs_dmap.c:2641
 dbAdjCtl+0x34c/0xa20 fs/jfs/jfs_dmap.c:2533
 dbAllocDmap+0xc6/0x150 fs/jfs/jfs_dmap.c:2044
 dbAlloc+0x469/0xba0 fs/jfs/jfs_dmap.c:805
 extBalloc fs/jfs/jfs_extent.c:336 [inline]
 extAlloc+0x54a/0xfb0 fs/jfs/jfs_extent.c:127
 jfs_get_block+0x346/0xab0 fs/jfs/inode.c:248
 get_more_blocks fs/direct-io.c:648 [inline]
 do_direct_IO fs/direct-io.c:936 [inline]
 __blockdev_direct_IO+0x16fc/0x3490 fs/direct-io.c:1243
 blockdev_direct_IO include/linux/fs.h:3506 [inline]
 jfs_direct_IO+0x119/0x220 fs/jfs/inode.c:333
 generic_file_direct_write+0x1db/0x3e0 mm/filemap.c:4109
 __generic_file_write_iter+0x11d/0x230 mm/filemap.c:4278
 generic_file_write_iter+0x117/0x550 mm/filemap.c:4318
 iter_file_splice_write+0x975/0x10e0 fs/splice.c:738
 do_splice_from fs/splice.c:938 [inline]
 direct_splice_actor+0x101/0x160 fs/splice.c:1161
 splice_direct_to_actor+0x5a5/0xcc0 fs/splice.c:1105
 do_splice_direct_actor fs/splice.c:1204 [inline]
 do_splice_direct+0x181/0x270 fs/splice.c:1230
 do_sendfile+0x4da/0x7e0 fs/read_write.c:1370
 __do_sys_sendfile64 fs/read_write.c:1431 [inline]
 __se_sys_sendfile64+0x13e/0x190 fs/read_write.c:1417
 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: 0033:0x7fc74e98ebe9
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:00007fc74f7c1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fc74ebc5fa0 RCX: 00007fc74e98ebe9
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000005
RBP: 00007fc74ea11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000080000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc74ebc6038 R14: 00007fc74ebc5fa0 R15: 00007ffe3b1bc0c8
 </TASK>
---[ end trace ]---