loop0: detected capacity change from 0 to 32768 ... Log Wrap ... Log Wrap ... Log Wrap ... jfs_lookup: dtSearch returned -5 ... Log Wrap ... Log Wrap ... Log Wrap ... ... Log Wrap ... Log Wrap ... Log Wrap ... ... Log Wrap ... Log Wrap ... Log Wrap ... ... Log Wrap ... Log Wrap ... Log Wrap ... ... Log Wrap ... Log Wrap ... Log Wrap ... ... Log Wrap ... Log Wrap ... Log Wrap ... ... Log Wrap ... Log Wrap ... Log Wrap ... ... Log Wrap ... Log Wrap ... Log Wrap ... ... Log Wrap ... Log Wrap ... Log Wrap ... find_entry called with index >= next_index ------------[ cut here ]------------ UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:1998:37 index -128 is out of range for type 'struct dtslot[128]' CPU: 0 UID: 0 PID: 5343 Comm: syz.0.0 Not tainted 6.16.0-rc3-syzkaller-00057-g92ca6c498a5e #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: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 ubsan_epilogue+0xa/0x40 lib/ubsan.c:233 __ubsan_handle_out_of_bounds+0xe9/0xf0 lib/ubsan.c:455 dtSplitRoot+0xae9/0x16c0 fs/jfs/jfs_dtree.c:1998 dtSplitUp fs/jfs/jfs_dtree.c:993 [inline] dtInsert+0xef8/0x5f40 fs/jfs/jfs_dtree.c:871 jfs_create+0x6c8/0xa80 fs/jfs/namei.c:137 lookup_open fs/namei.c:3717 [inline] open_last_lookups fs/namei.c:3816 [inline] path_openat+0x14f1/0x3830 fs/namei.c:4052 do_filp_open+0x1fa/0x410 fs/namei.c:4082 do_sys_openat2+0x121/0x1c0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1463 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: 0033:0x7efd82f8e929 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:00007efd7f3f5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007efd831b5fa0 RCX: 00007efd82f8e929 RDX: 000000000000275a RSI: 0000200000000200 RDI: ffffffffffffff9c RBP: 00007efd83010b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007efd831b5fa0 R15: 00007fff9de7c4f8 ---[ end trace ]---