------------[ cut here ]------------ UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dmap.c:661:7 index 128 is out of range for type 's64[128]' (aka 'long long[128]') CPU: 1 UID: 0 PID: 5720 Comm: syz.3.23 Not tainted 6.11.0-syzkaller-02520-gadfc3ded5c33 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 ubsan_epilogue lib/ubsan.c:231 [inline] __ubsan_handle_out_of_bounds+0x121/0x150 lib/ubsan.c:429 dbNextAG+0x3f3/0x630 fs/jfs/jfs_dmap.c:661 dbAlloc+0x62d/0xca0 fs/jfs/jfs_dmap.c:882 xtInsert+0xac1/0xfb0 fs/jfs/jfs_xtree.c:567 diNewIAG fs/jfs/jfs_imap.c:2526 [inline] diAllocExt fs/jfs/jfs_imap.c:1905 [inline] diAllocAG+0x1521/0x1e50 fs/jfs/jfs_imap.c:1669 diAlloc+0x1d3/0x1760 fs/jfs/jfs_imap.c:1590 ialloc+0x8f/0x900 fs/jfs/jfs_inode.c:56 jfs_symlink+0x20d/0x10f0 fs/jfs/namei.c:917 vfs_symlink+0x137/0x2e0 fs/namei.c:4615 do_symlinkat+0x222/0x3a0 fs/namei.c:4641 __do_sys_symlink fs/namei.c:4662 [inline] __se_sys_symlink fs/namei.c:4660 [inline] __x64_sys_symlink+0x7a/0x90 fs/namei.c:4660 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa72fb7def9 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:00007fa730909038 EFLAGS: 00000246 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 00007fa72fd36058 RCX: 00007fa72fb7def9 RDX: 0000000000000000 RSI: 0000000020000cc0 RDI: 0000000020000dc0 RBP: 00007fa72fbf0b76 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fa72fd36058 R15: 00007ffe0ef05418 ---[ end trace ]---