ptrace attach of "/root/syz-executor.0"[31883] was attempted by "/root/syz-executor.0"[31892]
------------[ cut here ]------------
kernel BUG at fs/buffer.c:605!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 31891 Comm: syz-executor.5 Not tainted 4.14.139 #35
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88805451e6c0 task.stack: ffff8880349f8000
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:ffff8880349ff678 EFLAGS: 00010212
RAX: 0000000000040000 RBX: ffff888047b69540 RCX: ffffc9000622f000
RDX: 000000000000e116 RSI: ffffffff819964ca RDI: ffff88804cfb8ef8
RBP: ffff8880349ff6b0 R08: ffff88805451e6c0 R09: 0000000000000004
R10: 0000000000000000 R11: ffff88805451e6c0 R12: ffff88804cfb8d98
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=17522 sclass=netlink_route_socket pig=31926 comm=syz-executor.2
R13: 0000000000000000 R14: ffff8880a77e4b20 R15: 000000000000024d
FS:  00007f6692242700(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000a1268000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 fat16_ent_put+0xc5/0x100 fs/fat/fatent.c:181
 fat_free_clusters+0x369/0x810 fs/fat/fatent.c:593
 fat_free fs/fat/file.c:351 [inline]
 fat_truncate_blocks+0x693/0xae0 fs/fat/file.c:369
 fat_setattr+0x6c1/0xae0 fs/fat/file.c:513
 notify_change+0x8d1/0xd10 fs/attr.c:313
 do_truncate+0x124/0x1c0 fs/open.c:63
 handle_truncate fs/namei.c:3009 [inline]
 do_last fs/namei.c:3434 [inline]
 path_openat+0x2786/0x3f70 fs/namei.c:3566
 do_filp_open+0x18e/0x250 fs/namei.c:3600
 do_sys_open+0x2c5/0x430 fs/open.c:1084
 SYSC_open fs/open.c:1102 [inline]
 SyS_open fs/open.c:1097 [inline]
 SYSC_creat fs/open.c:1142 [inline]
 SyS_creat+0x27/0x30 fs/open.c:1140
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459829
RSP: 002b:00007f6692241c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000459829
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000080
RBP: 000000000075c070 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f66922426d4
R13: 00000000004bfe84 R14: 00000000004d1d40 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 9d 82 04 e9 13 fe ff ff e8 a6 78 c3 ff <0f> 0b 4c 89 ff e8 5c 25 ed ff e9 f8 fd ff ff e8 52 25 ed ff e9 
RIP: mark_buffer_dirty_inode fs/buffer.c:605 [inline] RSP: ffff8880349ff678
RIP: mark_buffer_dirty_inode+0x2ea/0x3e0 fs/buffer.c:596 RSP: ffff8880349ff678
---[ end trace f39b7dbe3a78e4a5 ]---