==================================================================
BUG: KASAN: global-out-of-bounds in show_timer+0x278/0x2b0 fs/proc/base.c:2303
Read of size 8 at addr ffffffff857433b0 by task syz-executor0/8115

CPU: 0 PID: 8115 Comm: syz-executor0 Not tainted 4.15.0-rc2-mm1+ #39
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 print_address_description+0x178/0x250 mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report+0x25b/0x340 mm/kasan/report.c:409
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:430
 show_timer+0x278/0x2b0 fs/proc/base.c:2303
 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: 0033:0x452a39
RSP: 002b:00007fbafb61cc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00007fbafb61c950 RCX: 0000000000452a39
RDX: 0000000000000005 RSI: 0000000020c1bfb0 RDI: 0000000000000016
RBP: 00007fbafb61c940 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000056 R11: 0000000000000212 R12: 00000000004b73a6
R13: 00007fbafb61cac8 R14: 00000000004b73b1 R15: 0000000000000000

The buggy address belongs to the variable:
 proc_tid_base_operations+0x290/0xc60

Memory state around the buggy address:
 ffffffff85743280: 07 fa fa fa fa fa fa fa 03 fa fa fa fa fa fa fa
 ffffffff85743300: 04 fa fa fa fa fa fa fa 00 fa fa fa fa fa fa fa
>ffffffff85743380: 05 fa fa fa fa fa fa fa 07 fa fa fa fa fa fa fa
                                     ^
 ffffffff85743400: 00 04 fa fa fa fa fa fa 07 fa fa fa fa fa fa fa
 ffffffff85743480: 05 fa fa fa fa fa fa fa 00 fa fa fa fa fa fa fa
==================================================================
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 8115 Comm: syz-executor0 Tainted: G    B            4.15.0-rc2-mm1+ #39
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 panic+0x1e4/0x41c kernel/panic.c:183
 kasan_end_report+0x50/0x50 mm/kasan/report.c:176
 kasan_report_error mm/kasan/report.c:356 [inline]
 kasan_report+0x144/0x340 mm/kasan/report.c:409
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:430
 show_timer+0x278/0x2b0 fs/proc/base.c:2303
 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: 0033:0x452a39
RSP: 002b:00007fbafb61cc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00007fbafb61c950 RCX: 0000000000452a39
RDX: 0000000000000005 RSI: 0000000020c1bfb0 RDI: 0000000000000016
RBP: 00007fbafb61c940 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000056 R11: 0000000000000212 R12: 00000000004b73a6
R13: 00007fbafb61cac8 R14: 00000000004b73b1 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..