hid-generic 0000:0000:0000.0002: unknown main item tag 0x0
hid-generic 0000:0000:0000.0002: unknown main item tag 0x0
hid-generic 0000:0000:0000.0002: hidraw0: <UNKNOWN> HID v0.00 Device [syz1] on syz1
audit: type=1804 audit(1569828024.580:59): pid=7912 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op="invalid_pcr" cause="ToMToU" comm="syz-executor.4" name="/root/syzkaller-testdir383415197/syzkaller.p1V1uK/39/file0/file0" dev="loop4" ino=5 res=1
------------[ cut here ]------------
kernel BUG at fs/buffer.c:605!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
kobject: 'hidraw0' (ffff88805adaa550): fill_kobj_path: path = '/devices/virtual/misc/uhid/0000:0000:0000.0002/hidraw/hidraw0'
Modules linked in:
CPU: 1 PID: 7912 Comm: syz-executor.4 Not tainted 4.14.146 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff888056696680 task.stack: ffff888053940000
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:ffff888053947678 EFLAGS: 00010246
kobject: 'hidraw' (ffff888095fb6680): kobject_cleanup, parent           (null)
kobject: 'hidraw' (ffff888095fb6680): calling ktype release
RAX: 0000000000040000 RBX: ffff88809a3c0f18 RCX: ffffc9000bc7c000
RDX: 0000000000040000 RSI: ffffffff8199764a RDI: ffff88807e957478
RBP: ffff8880539476b0 R08: ffff888056696680 R09: 0000000000000004
R10: 0000000000000000 R11: ffff888056696680 R12: ffff88807e957318
R13: 0000000000000000 R14: ffff888088980c20 R15: 0000000000001870
FS:  00007f19d193f700(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32e28000 CR3: 00000000a0c14000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
kobject: 'hidraw': free name
Call Trace:
kobject: 'hidraw0' (ffff88805adaa550): kobject_cleanup, parent           (null)
 fat16_ent_put+0xc5/0x100 fs/fat/fatent.c:181
 fat_free_clusters+0x369/0x810 fs/fat/fatent.c:593
kobject: 'hidraw0' (ffff88805adaa550): calling ktype release
kobject: 'hidraw0': free name
 fat_free fs/fat/file.c:351 [inline]
 fat_truncate_blocks+0x693/0xae0 fs/fat/file.c:369
kobject: '0000:0000:0000.0002' (ffff888055d22438): kobject_uevent_env
 fat_setattr+0x6c1/0xae0 fs/fat/file.c:513
kobject: '0000:0000:0000.0002' (ffff888055d22438): fill_kobj_path: path = '/devices/virtual/misc/uhid/0000:0000:0000.0002'
kobject: '0000:0000:0000.0002' (ffff888055d22438): kobject_uevent_env
 notify_change+0x8d1/0xd10 fs/attr.c:313
 do_truncate+0x124/0x1c0 fs/open.c:63
kobject: '0000:0000:0000.0002' (ffff888055d22438): fill_kobj_path: path = '/devices/virtual/misc/uhid/0000:0000:0000.0002'
 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: 0033:0x459a29
RSP: 002b:00007f19d193ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000459a29
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000080
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f19d193f6d4
R13: 00000000004c0090 R14: 00000000004d20d0 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 30 af 82 04 e9 13 fe ff ff e8 a6 6c c3 ff <0f> 0b 4c 89 ff e8 cc 1c ed ff e9 f8 fd ff ff e8 c2 1c ed ff e9 
RIP: mark_buffer_dirty_inode fs/buffer.c:605 [inline] RSP: ffff888053947678
RIP: mark_buffer_dirty_inode+0x2ea/0x3e0 fs/buffer.c:596 RSP: ffff888053947678
---[ end trace d59bbab39bac1f0e ]---