kasan: GPF could be caused by NULL-ptr deref or user memory access
binder: 20272:20275 ioctl c018620b 0 returned -14
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 20268 Comm: syz-executor1 Not tainted 4.20.0-rc7-next-20181224 #190
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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: 'loop2' (00000000c91d52c9): kobject_uevent_env
RSP: 0018:ffff88808a607838 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8880870ee210 RCX: ffffc90007deb000
RDX: 0000000000000037 RSI: ffffffff81c8f3ea RDI: 00000000000001b8
RBP: ffff88808a607860 R08: ffffed1010eeb8bd R09: ffffed1010eeb8bc
R10: ffffed1010eeb8bc R11: ffff88808775c5e3 R12: 0000000000000000
R13: ffff8880870ee2b0 R14: dffffc0000000000 R15: 00000000000046d8
FS:  00007f2420b0b700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f763b3c4518 CR3: 00000000a89be000 CR4: 00000000001406f0
kobject: 'loop2' (00000000c91d52c9): fill_kobj_path: path = '/devices/virtual/block/loop2'
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 show_smap+0x167/0x580 fs/proc/task_mmu.c:805
kobject: 'loop3' (0000000037ad2e27): kobject_uevent_env
 traverse+0x344/0x7b0 fs/seq_file.c:113
 seq_read+0xc76/0x1150 fs/seq_file.c:188
kobject: 'loop3' (0000000037ad2e27): fill_kobj_path: path = '/devices/virtual/block/loop3'
 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: 'loop5' (00000000b7d8e47a): kobject_uevent_env
kobject: 'loop5' (00000000b7d8e47a): fill_kobj_path: path = '/devices/virtual/block/loop5'
 do_preadv+0x1cc/0x280 fs/read_write.c:1070
kobject: 'loop2' (00000000c91d52c9): kobject_uevent_env
 __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: 'loop2' (00000000c91d52c9): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop3' (0000000037ad2e27): kobject_uevent_env
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457ec9
kobject: 'loop3' (0000000037ad2e27): fill_kobj_path: path = '/devices/virtual/block/loop3'
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:00007f2420b0ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457ec9
RDX: 0000000000000001 RSI: 0000000020000700 RDI: 0000000000000004
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000246 R12: 00007f2420b0b6d4
R13: 00000000004c46f0 R14: 00000000004d79d8 R15: 00000000ffffffff
Modules linked in:
---[ end trace 2c53459329b435ac ]---
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
RSP: 0018:ffff88808a607838 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8880870ee210 RCX: ffffc90007deb000
RDX: 0000000000000037 RSI: ffffffff81c8f3ea RDI: 00000000000001b8
RBP: ffff88808a607860 R08: ffffed1010eeb8bd R09: ffffed1010eeb8bc
R10: ffffed1010eeb8bc R11: ffff88808775c5e3 R12: 0000000000000000
R13: ffff8880870ee2b0 R14: dffffc0000000000 R15: 00000000000046d8
FS:  00007f2420b0b700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f763b3c4518 CR3: 00000000a89be000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400