================================================================================
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dmap.c:2888:18
index -3 is out of range for type 's8[1365]' (aka 'signed char[1365]')
CPU: 0 PID: 5448 Comm: syz-executor.0 Not tainted 6.6.0-rc7-syzkaller-00041-g611da07b89fd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 ubsan_epilogue lib/ubsan.c:217 [inline]
 __ubsan_handle_out_of_bounds+0x11c/0x150 lib/ubsan.c:348
 dbAdjTree+0x355/0x4f0 fs/jfs/jfs_dmap.c:2888
 dbAllocBits+0x4df/0x990 fs/jfs/jfs_dmap.c:2184
 dbAllocDmap+0x6d/0x150 fs/jfs/jfs_dmap.c:2025
 dbAlloc+0x509/0xca0 fs/jfs/jfs_dmap.c:809
 extBalloc fs/jfs/jfs_extent.c:326 [inline]
 extAlloc+0x4f8/0x1000 fs/jfs/jfs_extent.c:122
 jfs_get_block+0x41b/0xe60 fs/jfs/inode.c:248
 __block_write_begin_int+0x54d/0x1ac0 fs/buffer.c:2120
 __block_write_begin fs/buffer.c:2169 [inline]
 block_write_begin+0x9b/0x1e0 fs/buffer.c:2228
 jfs_write_begin+0x31/0x70 fs/jfs/inode.c:299
 generic_perform_write+0x31b/0x630 mm/filemap.c:3969
 __generic_file_write_iter+0x1b4/0x230 mm/filemap.c:4061
 generic_file_write_iter+0xaf/0x310 mm/filemap.c:4090
 do_iter_write+0x84f/0xde0 fs/read_write.c:860
 vfs_writev fs/read_write.c:933 [inline]
 do_pwritev+0x21a/0x360 fs/read_write.c:1030
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f51cf27ad39
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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f51d03600c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007f51cf39bf80 RCX: 00007f51cf27ad39
RDX: 0000000000000001 RSI: 0000000020000240 RDI: 0000000000000003
RBP: 00007f51cf2d7567 R08: 0000000000000000 R09: 0000000000000003
R10: 0000000000001400 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f51cf39bf80 R15: 00007ffdc246a638
 </TASK>
================================================================================