================================================================================ UBSAN: array-index-out-of-bounds in fs/jfs/jfs_xtree.c:2304:9 index 19 is out of range for type 'xad_t[18]' (aka 'struct xad[18]') CPU: 1 PID: 23802 Comm: syz-executor.5 Not tainted 6.1.62-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 ubsan_epilogue lib/ubsan.c:151 [inline] __ubsan_handle_out_of_bounds+0x118/0x140 lib/ubsan.c:282 xtTruncate+0x2730/0x3260 fs/jfs/jfs_xtree.c:2304 jfs_truncate_nolock+0x184/0x380 fs/jfs/inode.c:393 jfs_truncate+0xc7/0x140 fs/jfs/inode.c:417 jfs_setattr+0x603/0x840 fs/jfs/file.c:119 notify_change+0xce3/0xfc0 fs/attr.c:499 do_truncate+0x21c/0x300 fs/open.c:65 handle_truncate fs/namei.c:3217 [inline] do_open fs/namei.c:3562 [inline] path_openat+0x27e2/0x2e60 fs/namei.c:3715 do_filp_open+0x230/0x480 fs/namei.c:3742 do_sys_openat2+0x13b/0x500 fs/open.c:1318 do_sys_open fs/open.c:1334 [inline] __do_sys_creat fs/open.c:1410 [inline] __se_sys_creat fs/open.c:1404 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1404 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: 0033:0x7f821cc7cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f821d9e90c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f821cd9c120 RCX: 00007f821cc7cae9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040 RBP: 00007f821ccc847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f821cd9c120 R15: 00007ffcc11505b8 ================================================================================