syzbot

[EXFAT] trying to mount...
------------[ cut here ]------------
[EXFAT] No bh, device seems wrong or to be ejected.
WARNING: CPU: 0 PID: 9848 at drivers/staging/exfat/exfat_blkdev.c:62 exfat_bdev_read+0x24f/0x2b0 drivers/staging/exfat/exfat_blkdev.c:62
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 9848 Comm: syz-executor748 Not tainted 5.4.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x197/0x210 lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:221
 __warn.cold+0x2f/0x3e kernel/panic.c:582
 report_bug+0x289/0x300 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 fixup_bug arch/x86/kernel/traps.c:169 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:exfat_bdev_read+0x24f/0x2b0 drivers/staging/exfat/exfat_blkdev.c:62
Code: 00 00 31 ff 41 bc fb ff ff ff 89 de e8 4a 9e 9d fb 85 db 0f 85 5d ff ff ff e8 bd 9c 9d fb 48 c7 c7 a0 ae a8 88 e8 30 51 6e fb <0f> 0b e9 45 ff ff ff e8 d5 ed da fb e9 ad fe ff ff e8 8b ed da fb
RSP: 0018:ffff888088227aa0 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815e4316 RDI: ffffed1011044f46
RBP: ffff888088227ad8 R08: ffff8880a13904c0 R09: ffffed1015d06621
R10: ffffed1015d06620 R11: ffff8880ae833107 R12: 00000000fffffffb
R13: ffff88808b460000 R14: 0000000000000001 R15: 0000000000000000
 sector_read+0x140/0x1f0 drivers/staging/exfat/exfat_core.c:2537
 ffsMountVol drivers/staging/exfat/exfat_super.c:376 [inline]
 exfat_fill_super.cold+0x2e4/0x895 drivers/staging/exfat/exfat_super.c:3716
 mount_bdev+0x304/0x3c0 fs/super.c:1415
 exfat_fs_mount+0x35/0x40 drivers/staging/exfat/exfat_super.c:3772
 legacy_get_tree+0x108/0x220 fs/fs_context.c:647
 vfs_get_tree+0x8e/0x300 fs/super.c:1545
 do_new_mount fs/namespace.c:2822 [inline]
 do_mount+0x135a/0x1b50 fs/namespace.c:3142
 ksys_mount+0xdb/0x150 fs/namespace.c:3351
 __do_sys_mount fs/namespace.c:3365 [inline]
 __se_sys_mount fs/namespace.c:3362 [inline]
 __x64_sys_mount+0xbe/0x150 fs/namespace.c:3362
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440199
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffca0b42078 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440199
RDX: 0000000020000300 RSI: 00000000200002c0 RDI: 0000000020000280
RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000400000 R11: 0000000000000246 R12: 0000000000401a20
R13: 0000000000401ab0 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..