UBSAN: shift-out-of-bounds in fs/jfs/jfs_extent.c:314:16
shift exponent -1 is negative
CPU: 1 PID: 18750 Comm: syz-executor.0 Not tainted 6.1.0-rc1-next-20221021-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 ubsan_epilogue+0xb/0x50 lib/ubsan.c:151
 __ubsan_handle_shift_out_of_bounds.cold+0xb1/0x187 lib/ubsan.c:322
 extHint.cold-0x5/0x1f
 jfs_get_block+0x661/0xa90 fs/jfs/inode.c:248
 __block_write_begin_int+0x3b9/0x14b0 fs/buffer.c:1991
 __block_write_begin fs/buffer.c:2041 [inline]
 block_write_begin+0xb5/0x440 fs/buffer.c:2102
 jfs_write_begin+0x2d/0xd0 fs/jfs/inode.c:304
 generic_perform_write+0x252/0x570 mm/filemap.c:3771
 __generic_file_write_iter+0x2aa/0x4d0 mm/filemap.c:3899
 generic_file_write_iter+0xdf/0x350 mm/filemap.c:3931
 __kernel_write_iter+0x25e/0x730 fs/read_write.c:517
 dump_emit_page fs/coredump.c:862 [inline]
 dump_user_range+0x244/0x680 fs/coredump.c:913
 elf_core_dump+0x26de/0x3510 fs/binfmt_elf.c:2311
 do_coredump+0x26ea/0x3c10 fs/coredump.c:760
 get_signal+0x1be1/0x2430 kernel/signal.c:2844
 arch_do_signal_or_restart+0x75/0x5b0 arch/x86/kernel/signal.c:306
 exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
 exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:203
 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:309
 asm_exc_alignment_check-0xe/0x30
RIP: 0033:0x7f1a16a8b5b1
Code: 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 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:00000000200001a0 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f1a16bac050 RCX: 00007f1a16a8b5a9
RDX: 0000000020004e40 RSI: 00000000200001a0 RDI: 0000000000080000
RBP: 00007f1a16ae67b0 R08: 0000000020004ec0 R09: 0000000020004ec0
R10: 0000000020004e80 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffffe45618f R14: 00007f1a17897300 R15: 0000000000022000
 </TASK>
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