syzbot

audit: type=1400 audit(1513107178.085:7): avc:  denied  { map } for  pid=3152 comm="syzkaller474186" path="/root/syzkaller474186958" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
BUG: unable to handle kernel paging request at fffffbfff1a68635
IP: show_timer+0x1c7/0x2b0 fs/proc/base.c:2274
PGD 21ffd3067 P4D 21ffd3067 PUD 21ffd2067 PMD 0 
Oops: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 3152 Comm: syzkaller474186 Not tainted 4.15.0-rc3+ #218
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:show_timer+0x1c7/0x2b0 fs/proc/base.c:2274
RSP: 0018:ffff8801c576f9e0 EFLAGS: 00010806
RAX: dffffc0000000000 RBX: ffff8801c51f0e00 RCX: ffffffff81cd0efe
RDX: 1ffffffff1a68635 RSI: ffffffff85f1a680 RDI: ffffffff8d3431a8
RBP: ffff8801c576fa10 R08: ffffed0038a0f50d R09: ffffed0038a0f50d
R10: ffff8801c58ca080 R11: ffffed0038a0f50c R12: 0000000001000001
R13: ffff8801c55d8ac0 R14: ffffffff85342260 R15: 0000000000000c50
FS:  00000000025c5880(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffbfff1a68635 CR3: 00000001c51ff000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 traverse+0x248/0xa00 fs/seq_file.c:111
 seq_read+0x96a/0x13d0 fs/seq_file.c:189
 do_loop_readv_writev fs/read_write.c:673 [inline]
 do_iter_read+0x3db/0x5b0 fs/read_write.c:897
 vfs_readv+0x121/0x1c0 fs/read_write.c:959
 do_preadv+0x11b/0x1a0 fs/read_write.c:1043
 SYSC_preadv fs/read_write.c:1093 [inline]
 SyS_preadv+0x30/0x40 fs/read_write.c:1088
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x440159
RSP: 002b:00007ffd7b4ee8e8 EFLAGS: 00000217 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00007ffd7b4ee8f0 RCX: 0000000000440159
RDX: 0000000000000001 RSI: 00000000205e2ff0 RDI: 0000000000000003
RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f
R10: 0001000000000000 R11: 0000000000000217 R12: 0000000000401a20
R13: 0000000000401ab0 R14: 0000000000000000 R15: 0000000000000000
Code: 89 c7 4c 0f 44 f1 41 83 e4 fb 4d 63 e4 e8 12 26 a3 ff 4a 8d 3c e5 a0 31 34 85 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 a2 00 00 00 4a 8b 14 e5 a0 31 34 85 4c 89 ef 
RIP: show_timer+0x1c7/0x2b0 fs/proc/base.c:2274 RSP: ffff8801c576f9e0
CR2: fffffbfff1a68635
---[ end trace 12305c6d07255c83 ]---