------------[ cut here ]------------
kernel BUG at fs/buffer.c:3049!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 31471 Comm: syz-executor.0 Not tainted 4.19.158-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:submit_bh_wbc+0x5e5/0x760 fs/buffer.c:3049
Code: 10 4c 8d 7b 20 48 89 44 24 08 e9 3e fc ff ff e8 01 21 b1 ff f0 80 63 01 f7 e9 4d fb ff ff e8 f2 20 b1 ff 0f 0b e8 eb 20 b1 ff <0f> 0b e8 e4 20 b1 ff 0f 0b e8 dd 20 b1 ff 0f 0b e8 d6 20 b1 ff 0f
RSP: 0018:ffff8880519d77c0 EFLAGS: 00010212
RAX: 0000000000040000 RBX: ffff88804ac59e70 RCX: ffffc90005b2f000
overlayfs: './file0' not a directory
RDX: 00000000000350da RSI: ffffffff81b3af15 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000008
FS:  00007f0e14845700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000118c000 CR3: 00000000a1a8d000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 submit_bh fs/buffer.c:3096 [inline]
 __bread_slow fs/buffer.c:1176 [inline]
 __bread_gfp+0x14e/0x300 fs/buffer.c:1369
 sb_bread include/linux/buffer_head.h:309 [inline]
 fat__get_entry+0x4f9/0x8e0 fs/fat/dir.c:101
 fat_get_entry fs/fat/dir.c:129 [inline]
 fat_get_short_entry+0x13f/0x2f0 fs/fat/dir.c:876
 fat_subdirs+0xa5/0x180 fs/fat/dir.c:942
 fat_read_root fs/fat/inode.c:1413 [inline]
 fat_fill_super+0x1cc0/0x35a0 fs/fat/inode.c:1847
 mount_bdev+0x2fc/0x3b0 fs/super.c:1158
 mount_fs+0xa3/0x30c fs/super.c:1261
 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
 vfs_kern_mount fs/namespace.c:951 [inline]
 do_new_mount fs/namespace.c:2469 [inline]
 do_mount+0x113c/0x2f10 fs/namespace.c:2799
 ksys_mount+0xcf/0x130 fs/namespace.c:3015
 __do_sys_mount fs/namespace.c:3029 [inline]
 __se_sys_mount fs/namespace.c:3026 [inline]
 __x64_sys_mount+0xba/0x150 fs/namespace.c:3026
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x46090a
Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 ad 89 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 8a 89 fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007f0e14844a88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f0e14844b20 RCX: 000000000046090a
RDX: 0000000020000040 RSI: 00000000200003c0 RDI: 00007f0e14844ae0
RBP: 00007f0e14844ae0 R08: 00007f0e14844b20 R09: 0000000020000040
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000040
R13: 00000000200003c0 R14: 0000000020000080 R15: 00000000200004c0
Modules linked in:
---[ end trace ca4d30ed17fa0a5f ]---
RIP: 0010:submit_bh_wbc+0x5e5/0x760 fs/buffer.c:3049
Code: 10 4c 8d 7b 20 48 89 44 24 08 e9 3e fc ff ff e8 01 21 b1 ff f0 80 63 01 f7 e9 4d fb ff ff e8 f2 20 b1 ff 0f 0b e8 eb 20 b1 ff <0f> 0b e8 e4 20 b1 ff 0f 0b e8 dd 20 b1 ff 0f 0b e8 d6 20 b1 ff 0f
RSP: 0018:ffff8880519d77c0 EFLAGS: 00010212
RAX: 0000000000040000 RBX: ffff88804ac59e70 RCX: ffffc90005b2f000
RDX: 00000000000350da RSI: ffffffff81b3af15 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000008
FS:  00007f0e14845700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
overlayfs: './file0' not a directory
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000052dbcc CR3: 00000000a1a8d000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400