================================================================================ UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:3392:30 index -1 is out of range for type 'struct dtslot [128]' CPU: 1 PID: 12268 Comm: syz-executor.0 Not tainted 6.1.0-rc4-syzkaller-00362-gfef7fd48922d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 ubsan_epilogue lib/ubsan.c:151 [inline] __ubsan_handle_out_of_bounds+0xdb/0x130 lib/ubsan.c:283 ciCompare fs/jfs/jfs_dtree.c:3392 [inline] dtSearch+0x184b/0x26c0 fs/jfs/jfs_dtree.c:639 jfs_lookup+0x11e/0x380 fs/jfs/namei.c:1454 __lookup_slow+0x266/0x3a0 fs/namei.c:1685 lookup_slow+0x53/0x70 fs/namei.c:1702 walk_component+0x2e1/0x410 fs/namei.c:1993 lookup_last fs/namei.c:2450 [inline] path_lookupat+0x17d/0x450 fs/namei.c:2474 filename_lookup+0x274/0x650 fs/namei.c:2503 user_path_at_empty+0x40/0x1a0 fs/namei.c:2876 user_path_at include/linux/namei.h:57 [inline] do_fchownat+0xdf/0x240 fs/open.c:761 __do_sys_chown fs/open.c:787 [inline] __se_sys_chown fs/open.c:785 [inline] __x64_sys_chown+0x7e/0x90 fs/open.c:785 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f1da408b639 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1da33ff168 EFLAGS: 00000246 ORIG_RAX: 000000000000005c RAX: ffffffffffffffda RBX: 00007f1da41abf80 RCX: 00007f1da408b639 RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000020000140 RBP: 00007f1da40e6a41 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffea3fe575f R14: 00007f1da33ff300 R15: 0000000000022000 ================================================================================