------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dmap.c:2768:24
index 1621 is out of range for type 's8[1365]' (aka 'signed char[1365]')
CPU: 1 UID: 0 PID: 115 Comm: jfsCommit Not tainted 6.15.0-rc1-syzkaller-gab59a8605604 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 ubsan_epilogue lib/ubsan.c:231 [inline]
 __ubsan_handle_out_of_bounds+0x121/0x150 lib/ubsan.c:453
 dbJoin+0x2ed/0x310 fs/jfs/jfs_dmap.c:2768
 dbFreeBits+0x4ea/0xdd0 fs/jfs/jfs_dmap.c:2328
 dbFreeDmap fs/jfs/jfs_dmap.c:2077 [inline]
 dbFree+0x35c/0x680 fs/jfs/jfs_dmap.c:394
 txFreeMap+0x798/0xd50 fs/jfs/jfs_txnmgr.c:2534
 txUpdateMap+0x353/0xb20 fs/jfs/jfs_txnmgr.c:-1
 txLazyCommit fs/jfs/jfs_txnmgr.c:2664 [inline]
 jfs_lazycommit+0x49c/0xba0 fs/jfs/jfs_txnmgr.c:2733
 kthread+0x7b9/0x940 kernel/kthread.c:464
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
---[ end trace ]---
Kernel panic - not syncing: UBSAN: panic_on_warn set ...
CPU: 1 UID: 0 PID: 115 Comm: jfsCommit Not tainted 6.15.0-rc1-syzkaller-gab59a8605604 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 panic+0x349/0x880 kernel/panic.c:354
 check_panic_on_warn+0x86/0xb0 kernel/panic.c:243
 ubsan_epilogue lib/ubsan.c:236 [inline]
 __ubsan_handle_out_of_bounds+0x141/0x150 lib/ubsan.c:453
 dbJoin+0x2ed/0x310 fs/jfs/jfs_dmap.c:2768
 dbFreeBits+0x4ea/0xdd0 fs/jfs/jfs_dmap.c:2328
 dbFreeDmap fs/jfs/jfs_dmap.c:2077 [inline]
 dbFree+0x35c/0x680 fs/jfs/jfs_dmap.c:394
 txFreeMap+0x798/0xd50 fs/jfs/jfs_txnmgr.c:2534
 txUpdateMap+0x353/0xb20 fs/jfs/jfs_txnmgr.c:-1
 txLazyCommit fs/jfs/jfs_txnmgr.c:2664 [inline]
 jfs_lazycommit+0x49c/0xba0 fs/jfs/jfs_txnmgr.c:2733
 kthread+0x7b9/0x940 kernel/kthread.c:464
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..