------------[ cut here ]------------ UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dmap.c:2778:24 index 4294967295 is out of range for type 's8[1365]' (aka 'signed char[1365]') CPU: 1 PID: 113 Comm: jfsCommit Not tainted 6.9.0-syzkaller-00967-gcd97950cbcab #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 ubsan_epilogue lib/ubsan.c:231 [inline] __ubsan_handle_out_of_bounds+0x121/0x150 lib/ubsan.c:429 dbJoin+0x2ed/0x310 fs/jfs/jfs_dmap.c:2778 dbFreeBits+0x4ef/0xdb0 fs/jfs/jfs_dmap.c:2338 dbFreeDmap fs/jfs/jfs_dmap.c:2087 [inline] dbFree+0x35b/0x680 fs/jfs/jfs_dmap.c:409 txFreeMap+0x96a/0xd50 fs/jfs/jfs_txnmgr.c:2515 xtTruncate+0xe65/0x3270 fs/jfs/jfs_xtree.c:2467 jfs_free_zero_link+0x46e/0x6e0 fs/jfs/namei.c:759 jfs_evict_inode+0x35f/0x440 fs/jfs/inode.c:153 evict+0x2a8/0x630 fs/inode.c:667 txUpdateMap+0x829/0x9f0 fs/jfs/jfs_txnmgr.c:2367 txLazyCommit fs/jfs/jfs_txnmgr.c:2664 [inline] jfs_lazycommit+0x49a/0xb80 fs/jfs/jfs_txnmgr.c:2733 kthread+0x2f0/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 ---[ end trace ]---