kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 22618 Comm: syz-executor4 Not tainted 4.15.0-rc1+ #199
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801c048c400 task.stack: ffff8801cd968000
RIP: 0010:show_timer+0x1c7/0x2b0 fs/proc/base.c:2274
RSP: 0018:ffff8801cd96f9e0 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: ffff8801cff22e40 RCX: ffffffff81ccb88e
RDX: 0000000030a68524 RSI: ffffc90002dea000 RDI: 0000000185342920
RBP: ffff8801cd96fa10 R08: ffffed003a0514c5 R09: ffffed003a0514c5
R10: ffff8801c048c400 R11: ffffed003a0514c4 R12: 0000000040000000
R13: ffff8801c79e7000 R14: ffffffff853419e0 R15: 0000000000000507
FS:  00007f19f811e700(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4ab586bdb8 CR3: 00000001d1788000 CR4: 00000000001426e0
DR0: 0000000020000000 DR1: 0000000020000008 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
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: 0033:0x4529d9
RSP: 002b:00007f19f811dc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00007f19f811d950 RCX: 00000000004529d9
RDX: 0000000000000001 RSI: 00000000205e2ff0 RDI: 0000000000000013
RBP: 00007f19f811d940 R08: 0000000000000000 R09: 0000000000000000
R10: 0001000000000000 R11: 0000000000000212 R12: 00000000004b7346
R13: 00007f19f811dac8 R14: 00000000004b7351 R15: 0000000000000000
Code: 89 c7 4c 0f 44 f1 41 83 e4 fb 4d 63 e4 e8 a2 2f a3 ff 4a 8d 3c e5 20 29 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 20 29 34 85 4c 89 ef 
RIP: show_timer+0x1c7/0x2b0 fs/proc/base.c:2274 RSP: ffff8801cd96f9e0
---[ end trace a6bb4fa3405ff530 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..