================================================================================ UBSAN: array-index-out-of-bounds in fs/jfs/jfs_xtree.c:622:15 index 19 is out of range for type 'xad_t [18]' CPU: 1 PID: 7763 Comm: syz-executor.1 Not tainted 6.6.0-rc4-syzkaller-00229-g82714078aee4 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x125/0x1b0 lib/dump_stack.c:106 ubsan_epilogue lib/ubsan.c:217 [inline] __ubsan_handle_out_of_bounds+0x111/0x150 lib/ubsan.c:348 xtInsert+0xe82/0xef0 fs/jfs/jfs_xtree.c:622 extAlloc+0x834/0xf00 fs/jfs/jfs_extent.c:145 jfs_get_block+0x428/0xb20 fs/jfs/inode.c:248 __block_write_begin_int+0x3c0/0x1560 fs/buffer.c:2120 __block_write_begin fs/buffer.c:2169 [inline] block_write_begin+0xb1/0x490 fs/buffer.c:2228 jfs_write_begin+0x31/0xd0 fs/jfs/inode.c:299 generic_perform_write+0x278/0x600 mm/filemap.c:3969 __generic_file_write_iter+0x1f9/0x240 mm/filemap.c:4064 generic_file_write_iter+0xe3/0x350 mm/filemap.c:4090 __kernel_write_iter+0x261/0x7e0 fs/read_write.c:517 dump_emit_page fs/coredump.c:888 [inline] dump_user_range+0x299/0x790 fs/coredump.c:915 elf_core_dump+0x2700/0x3900 fs/binfmt_elf.c:2142 do_coredump+0x2c96/0x3fc0 fs/coredump.c:764 get_signal+0x2434/0x2790 kernel/signal.c:2878 arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204 irqentry_exit_to_user_mode+0x9/0x40 kernel/entry/common.c:309 asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:564 RIP: 0033:0x7f334787caf1 Code: c4 28 c3 e8 e1 20 00 00 90 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 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f RSP: 002b:00000000200001d0 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f334799c050 RCX: 00007f334787cae9 RDX: 0000000020000100 RSI: 00000000200001d0 RDI: 0000000010205000 RBP: 00007f33478c847a R08: 00000000200003c0 R09: 00000000200003c0 R10: 0000000020000380 R11: 0000000000000206 R12: 0000000000000000 R13: 000000000000006e R14: 00007f334799c050 R15: 00007fff88a6f9a8 ================================================================================