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kernel BUG at fs/buffer.c:3122!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 18784 Comm: syz-executor.0 Not tainted 4.14.180-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88808fd6e100 task.stack: ffff8881fb270000
RIP: 0010:submit_bh_wbc+0x57b/0x700 fs/buffer.c:3122
RSP: 0018:ffff8881fb2778d0 EFLAGS: 00010202
RAX: 0000000000040000 RBX: ffff888082711930 RCX: ffffc90006304000
RDX: 000000000000ccc0 RSI: ffffffff8197355b RDI: 0000000000000000
RBP: 0000000000000014 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff8881fb36cc80
FS:  00007fd5cd243700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000078c000 CR3: 00000000a5363000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 submit_bh fs/buffer.c:3169 [inline]
 __bread_slow fs/buffer.c:1238 [inline]
 __bread_gfp+0xff/0x290 fs/buffer.c:1431
 sb_bread include/linux/buffer_head.h:309 [inline]
 fat__get_entry+0x439/0x800 fs/fat/dir.c:100
 fat_get_entry fs/fat/dir.c:128 [inline]
 fat_get_short_entry+0x133/0x2a0 fs/fat/dir.c:876
 fat_subdirs+0x8f/0x120 fs/fat/dir.c:942
 fat_read_root fs/fat/inode.c:1406 [inline]
 fat_fill_super+0x1a12/0x3010 fs/fat/inode.c:1834
 mount_bdev+0x2bc/0x370 fs/super.c:1134
 mount_fs+0x92/0x2a0 fs/super.c:1237
 vfs_kern_mount.part.0+0x5b/0x3c0 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2549 [inline]
 do_mount+0x3c9/0x24f0 fs/namespace.c:2879
 SYSC_mount fs/namespace.c:3095 [inline]
 SyS_mount+0xa8/0x120 fs/namespace.c:3072
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45f47a
RSP: 002b:00007fd5cd242a68 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000508c80 RCX: 000000000045f47a
RDX: 00007fd5cd242ae0 RSI: 00000000200002c0 RDI: 00007fd5cd242b00
RBP: 000000000078bf00 R08: 00007fd5cd242b40 R09: 00007fd5cd242ae0
R10: 0000000000000000 R11: 0000000000000206 R12: 00000000ffffffff
R13: 0000000000000bf9 R14: 00000000004ce3ea R15: 00007fd5cd2436d4
Code: 10 c3 ff f0 80 63 01 f7 e9 5d fb ff ff 48 8d 43 10 4c 8d 7b 20 48 89 44 24 08 e9 4c fc ff ff e8 6c 10 c3 ff 0f 0b e8 65 10 c3 ff <0f> 0b e8 5e 10 c3 ff 0f 0b e8 57 10 c3 ff 0f 0b e8 50 10 c3 ff 
RIP: submit_bh_wbc+0x57b/0x700 fs/buffer.c:3122 RSP: ffff8881fb2778d0
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.
---[ end trace fe48559519081ef7 ]---