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kernel BUG at fs/buffer.c:605!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 572 Comm: syz-executor.1 Not tainted 4.14.181-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88808bc88500 task.stack: ffff888210cd0000
RIP: 0010:mark_buffer_dirty_inode+0x2d8/0x3a0 fs/buffer.c:605
RSP: 0018:ffff888210cd7738 EFLAGS: 00010212
RAX: 0000000000040000 RBX: ffff888088928a80 RCX: ffffc9000a8bf000
RDX: 0000000000010ef9 RSI: ffffffff8196e298 RDI: ffff888040d82480
RBP: ffff888040d82320 R08: 0000000000000001 R09: 0000000000000004
R10: ffff88808bc88e28 R11: ffff88808bc88500 R12: ffff888084f16ba8
R13: 0000000000000000 R14: ffff888211e684c0 R15: ffff888210cd7810
FS:  00007f8fa2a41700(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3012a000 CR3: 000000020c4cc000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 fat_free_clusters+0x2fb/0x830 fs/fat/fatent.c:596
 fat_free fs/fat/file.c:351 [inline]
 fat_truncate_blocks+0x670/0xae0 fs/fat/file.c:369
 fat_setattr+0x6c2/0xad0 fs/fat/file.c:513
 notify_change+0x56b/0xd10 fs/attr.c:313
 do_truncate+0xff/0x1a0 fs/open.c:63
 handle_truncate fs/namei.c:3010 [inline]
 do_last fs/namei.c:3437 [inline]
 path_openat+0x1e4e/0x2aa0 fs/namei.c:3569
 do_filp_open+0x18e/0x250 fs/namei.c:3603
 do_sys_open+0x292/0x3e0 fs/open.c:1081
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45ca29
RSP: 002b:00007f8fa2a40c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00000000004db4c0 RCX: 000000000045ca29
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000240
RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000009a R14: 00000000004c3507 R15: 00007f8fa2a416d4
Code: fa 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 4d 48 89 6b 58 4c 89 ef e8 42 63 a7 04 e9 20 fe ff ff e8 d8 be c3 ff <0f> 0b 4c 89 ff e8 ce 00 ed ff e9 05 fe ff ff e8 c4 00 ed ff e9 
RIP: mark_buffer_dirty_inode+0x2d8/0x3a0 fs/buffer.c:605 RSP: ffff888210cd7738
---[ end trace 441923e8567ec306 ]---