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UBSAN: shift-out-of-bounds in fs/jfs/jfs_extent.c:314:16
shift exponent -1 is negative
CPU: 0 PID: 18473 Comm: syz-executor.2 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
 exc_page_fault+0xbc/0x170 arch/x86/mm/fault.c:1578
 asm_exc_machine_check-0xe/0x40
RIP: 0033:0x7f92af827dc7
Code: 38 5d 41 5c c3 48 8d 3d 55 d8 0b 00 e8 72 f8 ff ff 48 8d 3d 57 d8 0b 00 e8 66 f8 ff ff 66 0f 1f 44 00 00 55 89 fd 48 83 ec 10 <64> 8b 04 25 b4 ff ff ff 85 c0 74 2a 89 fe 31 c0 bf 3c 00 00 00 e8
RSP: 002b:00007f92b05c31a0 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 00007f92af9ac050 RCX: 00007f92af88b5a9
RDX: 00007f92b05c31c0 RSI: 00007f92b05c32f0 RDI: 000000000000000b
RBP: 000000000000000b R08: 0000000000000000 R09: 0000000000000058
R10: 00007f92b05e2050 R11: 0000000000000246 R12: 0000000000000058
R13: 00007ffeed88c56f R14: 00007f92b05e2300 R15: 0000000000022000
 </TASK>
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