================================================================================
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dmap.c:2848:24
index 1621 is out of range for type 's8[1365]' (aka 'signed char[1365]')
CPU: 1 PID: 276 Comm: jfsCommit Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 ubsan_epilogue+0xa/0x30 lib/ubsan.c:151
 __ubsan_handle_out_of_bounds+0xdf/0xf0 lib/ubsan.c:282
 dbJoin+0x29a/0x300 fs/jfs/jfs_dmap.c:2848
 dbFreeBits+0x4e1/0xd80 fs/jfs/jfs_dmap.c:2408
 dbFreeDmap fs/jfs/jfs_dmap.c:2157 [inline]
 dbFree+0x32e/0x640 fs/jfs/jfs_dmap.c:398
 txFreeMap+0x7fb/0xde0 fs/jfs/jfs_txnmgr.c:2569
 txUpdateMap+0x306/0x890 fs/jfs/jfs_txnmgr.c:-1
 txLazyCommit fs/jfs/jfs_txnmgr.c:2699 [inline]
 jfs_lazycommit+0x437/0xb20 fs/jfs/jfs_txnmgr.c:2767
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
================================================================================
Kernel panic - not syncing: UBSAN: panic_on_warn set ...
CPU: 1 PID: 276 Comm: jfsCommit Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 panic+0x2c9/0x7f0 kernel/panic.c:309
 check_panic_on_warn+0x80/0xa0 kernel/panic.c:229
 __ubsan_handle_out_of_bounds+0xdf/0xf0 lib/ubsan.c:282
 dbJoin+0x29a/0x300 fs/jfs/jfs_dmap.c:2848
 dbFreeBits+0x4e1/0xd80 fs/jfs/jfs_dmap.c:2408
 dbFreeDmap fs/jfs/jfs_dmap.c:2157 [inline]
 dbFree+0x32e/0x640 fs/jfs/jfs_dmap.c:398
 txFreeMap+0x7fb/0xde0 fs/jfs/jfs_txnmgr.c:2569
 txUpdateMap+0x306/0x890 fs/jfs/jfs_txnmgr.c:-1
 txLazyCommit fs/jfs/jfs_txnmgr.c:2699 [inline]
 jfs_lazycommit+0x437/0xb20 fs/jfs/jfs_txnmgr.c:2767
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..