kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 16420 Comm: syz-executor4 Not tainted 4.20.0-rc7-next-20181224 #190
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
kobject: 'loop3' (00000000b5bfeddc): kobject_uevent_env
RIP: 0010:transparent_hugepage_enabled+0x8c/0x5e0 mm/huge_memory.c:69
Code: 80 3c 02 00 0f 85 ae 04 00 00 4c 8b a3 a0 00 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d bc 24 b8 01 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 91 04 00 00 49 8b bc 24 b8 01 00 00 e8 2d 70 e6
kobject: 'loop3' (00000000b5bfeddc): fill_kobj_path: path = '/devices/virtual/block/loop3'
RSP: 0018:ffff8880534bf838 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8880a414c420 RCX: ffffc9000de37000
RDX: 0000000000000037 RSI: ffffffff81c8f3ea RDI: 00000000000001b8
RBP: ffff8880534bf860 R08: ffffed1012d10865 R09: ffffed1012d10864
R10: ffffed1012d10864 R11: ffff888096884323 R12: 0000000000000000
R13: ffff8880a414c4c0 R14: dffffc0000000000 R15: 00000000000046d8
FS:  00007fbedf075700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kobject: 'loop3' (00000000b5bfeddc): kobject_uevent_env
CR2: 000000000070a158 CR3: 00000000a84ee000 CR4: 00000000001406f0
kobject: 'loop3' (00000000b5bfeddc): fill_kobj_path: path = '/devices/virtual/block/loop3'
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 show_smap+0x167/0x580 fs/proc/task_mmu.c:805
 traverse+0x344/0x7b0 fs/seq_file.c:113
 seq_read+0xc76/0x1150 fs/seq_file.c:188
 do_loop_readv_writev fs/read_write.c:700 [inline]
 do_iter_read+0x4bc/0x670 fs/read_write.c:924
 vfs_readv+0x175/0x1c0 fs/read_write.c:986
kobject: '0000:0000:0000.00D2' (00000000f8f076dd): kobject_add_internal: parent: 'uhid', set: 'devices'
 do_preadv+0x1cc/0x280 fs/read_write.c:1070
kobject: '0000:0000:0000.00D2' (00000000f8f076dd): kobject_uevent_env
kobject: '0000:0000:0000.00D2' (00000000f8f076dd): fill_kobj_path: path = '/devices/virtual/misc/uhid/0000:0000:0000.00D2'
 __do_sys_preadv fs/read_write.c:1120 [inline]
 __se_sys_preadv fs/read_write.c:1115 [inline]
 __x64_sys_preadv+0x9a/0xf0 fs/read_write.c:1115
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
kobject: 'hidraw' (000000005f23a86f): kobject_add_internal: parent: '0000:0000:0000.00D2', set: '(null)'
kobject: 'hidraw2' (00000000b5200b79): kobject_add_internal: parent: 'hidraw', set: 'devices'
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457ec9
Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fbedf074c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457ec9
RDX: 00000000000001fe RSI: 00000000200017c0 RDI: 0000000000000003
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000400000000000 R11: 0000000000000246 R12: 00007fbedf0756d4
R13: 00000000004c46f0 R14: 00000000004d79d8 R15: 00000000ffffffff
Modules linked in:
kobject: 'loop1' (000000001c80bab1): kobject_uevent_env
kobject: 'hidraw2' (00000000b5200b79): kobject_uevent_env
---[ end trace 92e0629d85ecbee1 ]---
kobject: 'loop1' (000000001c80bab1): fill_kobj_path: path = '/devices/virtual/block/loop1'
RIP: 0010:transparent_hugepage_enabled+0x8c/0x5e0 mm/huge_memory.c:69
kobject: 'hidraw2' (00000000b5200b79): fill_kobj_path: path = '/devices/virtual/misc/uhid/0000:0000:0000.00D2/hidraw/hidraw2'
Code: 80 3c 02 00 0f 85 ae 04 00 00 4c 8b a3 a0 00 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d bc 24 b8 01 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 91 04 00 00 49 8b bc 24 b8 01 00 00 e8 2d 70 e6
hid-generic 0000:0000:0000.00D2: hidraw2: <UNKNOWN> HID v0.00 Device [syz1] on syz0
kobject: '0000:0000:0000.00D2' (00000000f8f076dd): kobject_uevent_env
RSP: 0018:ffff8880534bf838 EFLAGS: 00010202
kobject: '0000:0000:0000.00D2' (00000000f8f076dd): fill_kobj_path: path = '/devices/virtual/misc/uhid/0000:0000:0000.00D2'
RAX: dffffc0000000000 RBX: ffff8880a414c420 RCX: ffffc9000de37000
kobject: 'hidraw2' (00000000b5200b79): kobject_uevent_env
RDX: 0000000000000037 RSI: ffffffff81c8f3ea RDI: 00000000000001b8
kobject: 'loop0' (00000000995df714): kobject_uevent_env
RBP: ffff8880534bf860 R08: ffffed1012d10865 R09: ffffed1012d10864
R10: ffffed1012d10864 R11: ffff888096884323 R12: 0000000000000000
kobject: 'hidraw2' (00000000b5200b79): fill_kobj_path: path = '/devices/virtual/misc/uhid/0000:0000:0000.00D2/hidraw/hidraw2'
R13: ffff8880a414c4c0 R14: dffffc0000000000 R15: 00000000000046d8
kobject: 'loop0' (00000000995df714): fill_kobj_path: path = '/devices/virtual/block/loop0'
FS:  00007fbedf075700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffee0f61bfc CR3: 00000000a84ee000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
kobject: 'hidraw' (000000005f23a86f): kobject_cleanup, parent           (null)
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400