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: 0 PID: 4428 Comm: syz-executor4 Not tainted 4.15.0-rc2-mm1+ #39
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:show_timer+0x1c7/0x2b0 fs/proc/base.c:2303
RSP: 0018:ffff8801bd7e7ac8 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: ffff8801c0ce8600 RCX: ffffffff81cd4ece
RDX: 000000005305891f RSI: ffffc9000290f000 RDI: 00000002982c48f8
RBP: ffff8801bd7e7af8 R08: ffffed003a093c5d R09: ffffed003a093c5d
R10: ffff8801d0772080 R11: ffffed003a093c5c R12: 000000006257032b
R13: ffff8801d7673a00 R14: ffffffff857420a0 R15: 0000000000000074
FS:  00007fe87f74e700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000205e2ff0 CR3: 00000001d1677002 CR4: 00000000001626f0
DR0: 0000000020001000 DR1: 0000000020001008 DR2: 0000000020001000
DR3: 0000000020001008 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 seq_read+0xb5a/0x13d0 fs/seq_file.c:269
 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: 0033:0x452a09
RSP: 002b:00007fe87f74dc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452a09
RDX: 0000000000000001 RSI: 00000000205e2ff0 RDI: 0000000000000013
RBP: 00000000000005c4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f5b00
R13: 00000000ffffffff R14: 00007fe87f74e6d4 R15: 0000000000000000
Code: 89 c7 4c 0f 44 f1 41 83 e4 fb 4d 63 e4 e8 d2 e6 a2 ff 4a 8d 3c e5 a0 2f 74 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 2f 74 85 4c 89 ef 
RIP: show_timer+0x1c7/0x2b0 fs/proc/base.c:2303 RSP: ffff8801bd7e7ac8
---[ end trace 8e8d6679650af7e9 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
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Kernel Offset: disabled
Rebooting in 86400 seconds..