audit: type=1400 audit(1513126596.328:13): avc:  denied  { setgid } for  pid=3406 comm="syz-executor5" capability=6  scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1
==================================================================
BUG: KASAN: global-out-of-bounds in show_timer+0x278/0x2b0 fs/proc/base.c:2303
Read of size 8 at addr ffffffff85742fb8 by task syz-executor1/3405

CPU: 0 PID: 3405 Comm: syz-executor1 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
 seq_read+0x385/0x13d0 fs/seq_file.c:234
 __vfs_read+0xef/0xa00 fs/read_write.c:411
 vfs_read+0x124/0x360 fs/read_write.c:447
 SYSC_pread64 fs/read_write.c:611 [inline]
 SyS_pread64+0x161/0x190 fs/read_write.c:598
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452a39
RSP: 002b:00007f6c88f9cc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000011
RAX: ffffffffffffffda RBX: 00007f6c88f9c950 RCX: 0000000000452a39
RDX: 0000000000001000 RSI: 0000000020f8d000 RDI: 0000000000000016
RBP: 00007f6c88f9c940 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b73a6
R13: 00007f6c88f9cac8 R14: 00000000004b73b1 R15: 0000000000000000

The buggy address belongs to the variable:
 nstr.44378+0x18/0x40

Memory state around the buggy address:
 ffffffff85742e80: fa fa fa fa 00 06 fa fa fa fa fa fa 07 fa fa fa
 ffffffff85742f00: fa fa fa fa 05 fa fa fa fa fa fa fa 07 fa fa fa
>ffffffff85742f80: fa fa fa fa 00 00 00 fa fa fa fa fa 00 fa fa fa
                                        ^
 ffffffff85743000: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00 00
 ffffffff85743080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 3405 Comm: syz-executor1 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
 seq_read+0x385/0x13d0 fs/seq_file.c:234
 __vfs_read+0xef/0xa00 fs/read_write.c:411
 vfs_read+0x124/0x360 fs/read_write.c:447
 SYSC_pread64 fs/read_write.c:611 [inline]
 SyS_pread64+0x161/0x190 fs/read_write.c:598
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452a39
RSP: 002b:00007f6c88f9cc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000011
RAX: ffffffffffffffda RBX: 00007f6c88f9c950 RCX: 0000000000452a39
RDX: 0000000000001000 RSI: 0000000020f8d000 RDI: 0000000000000016
RBP: 00007f6c88f9c940 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b73a6
R13: 00007f6c88f9cac8 R14: 00000000004b73b1 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..