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kernel BUG at fs/buffer.c:605!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 14469 Comm: syz-executor.2 Not tainted 4.14.114 #4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88805d9e45c0 task.stack: ffff88805cd78000
RIP: 0010:mark_buffer_dirty_inode fs/buffer.c:605 [inline]
RIP: 0010:mark_buffer_dirty_inode+0x2ea/0x3e0 fs/buffer.c:596
RSP: 0018:ffff88805cd7fc00 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff88809a3da150 RCX: ffffc90008a53000
RDX: 0000000000040000 RSI: ffffffff8199673a RDI: ffff888087e76478
RBP: ffff88805cd7fc38 R08: ffff88805d9e45c0 R09: 0000000000000002
R10: 0000000000000000 R11: ffff88805d9e45c0 R12: ffff888087e76318
R13: 0000000000000000 R14: ffff8880a77cbaa0 R15: 0000000000002206
FS:  00007f96f646e700(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001033aa8 CR3: 0000000098bd8000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 fat16_ent_put+0xc5/0x100 fs/fat/fatent.c:181
 fat_ent_write+0xc7/0x190 fs/fat/fatent.c:413
 fat_chain_add+0x3ed/0x590 fs/fat/misc.c:128
 fat_add_cluster+0xa1/0xc0 fs/fat/inode.c:105
 fat_fallocate+0x249/0x2e0 fs/fat/file.c:262
 vfs_fallocate+0x351/0x7a0 fs/open.c:319
 SYSC_fallocate fs/open.c:342 [inline]
 SyS_fallocate+0x52/0x90 fs/open.c:336
 do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x458da9
RSP: 002b:00007f96f646dc78 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000458da9
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000006
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000369e5d84 R11: 0000000000000246 R12: 00007f96f646e6d4
R13: 00000000004bf3dd R14: 00000000004d0668 R15: 00000000ffffffff
Code: fa 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 4d 4c 89 63 58 4c 89 ef e8 10 a8 81 04 e9 13 fe ff ff e8 76 81 c3 ff <0f> 0b 4c 89 ff e8 dc 26 ed ff e9 f8 fd ff ff e8 d2 26 ed ff e9 
RIP: mark_buffer_dirty_inode fs/buffer.c:605 [inline] RSP: ffff88805cd7fc00
RIP: mark_buffer_dirty_inode+0x2ea/0x3e0 fs/buffer.c:596 RSP: ffff88805cd7fc00
---[ end trace b734356b770b3204 ]---