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UBSAN: array-index-out-of-bounds in fs/jfs/jfs_xtree.c:360:4
index 18 is out of range for type 'xad_t [18]'
CPU: 0 PID: 1097 Comm: kworker/u17:7 Not tainted 6.4.0-syzkaller-10992-g56cbceab928d #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Workqueue: writeback wb_workfn (flush-7:3)
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x136/0x150 lib/dump_stack.c:106
 ubsan_epilogue lib/ubsan.c:217 [inline]
 __ubsan_handle_out_of_bounds+0xd5/0x140 lib/ubsan.c:348
 xtSearch+0x11b5/0x1690 fs/jfs/jfs_xtree.c:360
 xtLookup+0x242/0x8a0 fs/jfs/jfs_xtree.c:152
 jfs_get_block+0x336/0xa90 fs/jfs/inode.c:218
 __mpage_writepage+0x9e5/0x16b0 fs/mpage.c:559
 write_cache_pages+0x4a2/0xd30 mm/page-writeback.c:2473
 mpage_writepages+0xc6/0x170 fs/mpage.c:679
 do_writepages+0x1a8/0x640 mm/page-writeback.c:2551
 __writeback_single_inode+0x121/0xdb0 fs/fs-writeback.c:1603
 writeback_sb_inodes+0x54d/0xe70 fs/fs-writeback.c:1894
 __writeback_inodes_wb+0xc6/0x280 fs/fs-writeback.c:1965
 wb_writeback+0x4d5/0xa40 fs/fs-writeback.c:2072
 wb_check_background_flush fs/fs-writeback.c:2142 [inline]
 wb_do_writeback fs/fs-writeback.c:2230 [inline]
 wb_workfn+0x8b0/0xfc0 fs/fs-writeback.c:2257
 process_one_work+0xa34/0x16f0 kernel/workqueue.c:2597
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2748
 kthread+0x344/0x440 kernel/kthread.c:389
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
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