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kernel BUG at fs/buffer.c:3111!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
kobject: 'loop5' (ffff8880a4200ee0): fill_kobj_path: path = '/devices/virtual/block/loop5'
Modules linked in:
CPU: 1 PID: 7099 Comm: syz-executor073 Not tainted 4.14.159-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88809bed6640 task.stack: ffff888099b58000
RIP: 0010:submit_bh_wbc+0x5a0/0x720 fs/buffer.c:3111
RSP: 0018:ffff888099b5fa38 EFLAGS: 00010297
RAX: ffff88809bed6640 RBX: ffff88808ff60930 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000800 RDI: 0000000000000001
RBP: ffff888099b5fa80 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: ffff88809bed6640 R12: ffff88808ff60930
R13: 0000000000000800 R14: 0000000000000000 R15: 0000000000000001
FS:  0000000001e39940(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001f8d008 CR3: 00000000a9b9f000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 submit_bh fs/buffer.c:3158 [inline]
 __sync_dirty_buffer fs/buffer.c:3244 [inline]
 __sync_dirty_buffer+0xcf/0x260 fs/buffer.c:3235
 sync_dirty_buffer+0x1b/0x20 fs/buffer.c:3257
 fat_set_state+0x1f5/0x2e0 fs/fat/inode.c:695
 fat_fill_super+0x1e90/0x3560 fs/fat/inode.c:1861
 vfat_fill_super+0x32/0x40 fs/fat/namei_vfat.c:1059
 mount_bdev+0x2be/0x370 fs/super.c:1134
 vfat_mount+0x35/0x40 fs/fat/namei_vfat.c:1066
 mount_fs+0x97/0x2a1 fs/super.c:1237
 vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2549 [inline]
 do_mount+0x417/0x27d0 fs/namespace.c:2879
 SYSC_mount fs/namespace.c:3095 [inline]
 SyS_mount+0xab/0x120 fs/namespace.c:3072
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4487aa
RSP: 002b:00007ffe2d6cff58 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004487aa
RDX: 00007ffe2d6cffa0 RSI: 00000000200002c0 RDI: 00007ffe2d6cffc0
RBP: 0000000000000000 R08: 00007ffe2d6d0000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000402f60
R13: 0000000000402ff0 R14: 0000000000000000 R15: 0000000000000000
Code: f0 80 63 01 f7 e9 3d fb ff ff 48 8d 43 20 48 89 45 d0 48 8d 43 10 48 89 45 c0 e9 34 fc ff ff e8 87 3a c1 ff 0f 0b e8 80 3a c1 ff <0f> 0b e8 79 3a c1 ff 0f 0b e8 72 3a c1 ff 0f 0b e8 6b 3a c1 ff 
RIP: submit_bh_wbc+0x5a0/0x720 fs/buffer.c:3111 RSP: ffff888099b5fa38
---[ end trace eb01e1d9005bc5c1 ]---