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UBSAN: array-index-out-of-bounds in fs/jfs/jfs_xtree.c:360:4
index 19 is out of range for type 'xad_t[18]' (aka 'struct xad[18]')
CPU: 1 PID: 4987 Comm: syz.4.83 Not tainted 6.1.119-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 ubsan_epilogue lib/ubsan.c:151 [inline]
 __ubsan_handle_out_of_bounds+0x118/0x140 lib/ubsan.c:282
 xtSearch+0x6dc/0x1ca0 fs/jfs/jfs_xtree.c:360
 xtLookup+0x2c0/0x8e0 fs/jfs/jfs_xtree.c:152
 extHint+0x291/0x710 fs/jfs/jfs_extent.c:215
 jfs_get_block+0x3a7/0xe50 fs/jfs/inode.c:246
 __block_write_begin_int+0x544/0x1a30 fs/buffer.c:1991
 __block_write_begin fs/buffer.c:2041 [inline]
 block_write_begin+0x98/0x1f0 fs/buffer.c:2102
 jfs_write_begin+0x2d/0x60 fs/jfs/inode.c:304
 generic_perform_write+0x2fc/0x5e0 mm/filemap.c:3845
 __generic_file_write_iter+0x176/0x400 mm/filemap.c:3973
 generic_file_write_iter+0xab/0x310 mm/filemap.c:4005
 do_iter_write+0x6e6/0xc40 fs/read_write.c:861
 iter_file_splice_write+0x830/0xfc0 fs/splice.c:685
 do_splice_from fs/splice.c:763 [inline]
 direct_splice_actor+0xe3/0x1c0 fs/splice.c:950
 splice_direct_to_actor+0x4c7/0xc30 fs/splice.c:896
 do_splice_direct+0x2a5/0x3e0 fs/splice.c:1002
 generic_copy_file_range fs/read_write.c:1393 [inline]
 vfs_copy_file_range+0xb58/0x1640 fs/read_write.c:1539
 __do_sys_copy_file_range fs/read_write.c:1596 [inline]
 __se_sys_copy_file_range+0x3ea/0x5d0 fs/read_write.c:1559
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f9c1617e819
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:00007f9c16f37038 EFLAGS: 00000246 ORIG_RAX: 0000000000000146
RAX: ffffffffffffffda RBX: 00007f9c16335fa0 RCX: 00007f9c1617e819
RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007f9c161f175e R08: fffffbffa003e45c R09: 0700000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f9c16335fa0 R15: 00007ffd9579e4a8
 </TASK>
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