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..