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kernel BUG at fs/buffer.c:605!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 19987 Comm: syz-executor.0 Not tainted 4.14.179-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880a4aea380 task.stack: ffff888089fd0000
RIP: 0010:mark_buffer_dirty_inode fs/buffer.c:605 [inline]
RIP: 0010:mark_buffer_dirty_inode+0x2d8/0x3a0 fs/buffer.c:596
RSP: 0018:ffff888089fd7b30 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff888039135000 RCX: ffffc90005b84000
RDX: 0000000000040000 RSI: ffffffff8196cc38 RDI: ffff888039130f10
RBP: ffff888039130db0 R08: 0000000000000001 R09: 0000000000000003
R10: ffff8880a4aeac80 R11: ffff8880a4aea380 R12: ffff888085288c28
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888089fd7c80
FS:  00007f79691e2700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2fd21000 CR3: 0000000088129000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 fat_alloc_clusters+0x521/0xcb0 fs/fat/fatent.c:502
audit: type=1804 audit(1588865680.659:699): pid=20041 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir861096780/syzkaller.ROgaNz/1847/file0/file0" dev="loop0" ino=4878 res=1
 fat_add_cluster+0x5d/0xc0 fs/fat/inode.c:100
 fat_fallocate+0x242/0x2e0 fs/fat/file.c:267
 vfs_fallocate+0x346/0x790 fs/open.c:319
 SYSC_fallocate fs/open.c:342 [inline]
 SyS_fallocate+0x4a/0x80 fs/open.c:336
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45c829
RSP: 002b:00007f79691e1c78 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00000000004db760 RCX: 000000000045c829
RDX: 0000000000000000 RSI: 0000000100000001 RDI: 0000000000000005
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 000000002811ffff R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000000ae R14: 00000000004c33e0 R15: 00007f79691e26d4
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 62 15 aa 04 e9 20 fe ff ff e8 88 79 c3 ff <0f> 0b 4c 89 ff e8 3e ce ec ff e9 05 fe ff ff e8 34 ce ec ff e9 
RIP: mark_buffer_dirty_inode fs/buffer.c:605 [inline] RSP: ffff888089fd7b30
RIP: mark_buffer_dirty_inode+0x2d8/0x3a0 fs/buffer.c:596 RSP: ffff888089fd7b30
---[ end trace 247e6bf14f35d73a ]---