================================================================== BUG: KASAN: stack-out-of-bounds in user_mode arch/x86/include/asm/ptrace.h:131 [inline] BUG: KASAN: stack-out-of-bounds in unwind_next_frame+0x10a0/0x1400 arch/x86/kernel/unwind_orc.c:410 Read of size 8 at addr ffff88803fc578c0 by task syz-executor.3/21560 CPU: 0 PID: 21560 Comm: syz-executor.3 Not tainted 4.19.198-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 kasan_report mm/kasan/report.c:412 [inline] __asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433 user_mode arch/x86/include/asm/ptrace.h:131 [inline] unwind_next_frame+0x10a0/0x1400 arch/x86/kernel/unwind_orc.c:410 perf_callchain_kernel+0x3fa/0x5c0 arch/x86/events/core.c:2346 get_perf_callchain+0x392/0x860 kernel/events/callchain.c:202 perf_callchain+0x165/0x1c0 kernel/events/core.c:6474 perf_prepare_sample+0x81e/0x1620 kernel/events/core.c:6501 __perf_event_output kernel/events/core.c:6616 [inline] perf_event_output_forward+0xf3/0x270 kernel/events/core.c:6634 __perf_event_overflow+0x13c/0x370 kernel/events/core.c:7907 perf_swevent_hrtimer+0x272/0x3e0 kernel/events/core.c:9261 __run_hrtimer kernel/time/hrtimer.c:1419 [inline] __hrtimer_run_queues+0x3f6/0xe60 kernel/time/hrtimer.c:1481 hrtimer_interrupt+0x326/0x9e0 kernel/time/hrtimer.c:1539 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:arch_local_save_flags arch/x86/include/asm/paravirt.h:784 [inline] RIP: 0010:___might_sleep+0x183/0x2b0 kernel/sched/core.c:6159 Code: 82 f1 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 0d 01 00 00 48 83 3d 54 10 b0 08 00 0f 84 fd 00 00 00 9c <58> 0f 1f 44 00 00 f6 c4 02 0f 84 fa fe ff ff 65 4c 8b 2c 25 80 df RSP: 0018:ffff88803fc574b8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3048 RBX: 0000000000000000 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: 00000000ffffffff RDI: ffff8880a48bc6b0 RBP: ffffffff886a0980 R08: ffffffff86a2616e R09: 00001ffffffffffe R10: 0000000000000007 R11: 000000006dcd838a R12: 0000000000000399 R13: 0000000000000000 R14: ffff8880a48bc340 R15: ffffffff8dd7a970 nfnl_lock net/netfilter/nfnetlink.c:62 [inline] nfnetlink_rcv_batch+0x25e/0x1df0 net/netfilter/nfnetlink.c:322 __trace_hardirqs_on_caller kernel/locking/lockdep.c:2839 [inline] lockdep_hardirqs_on+0x3a8/0x5c0 kernel/locking/lockdep.c:2884 trace_hardirqs_on_thunk+0x1a/0x1c retint_kernel+0x2d/0x2d RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x50 kernel/kcov.c:100 Code: e8 21 cf 35 00 e9 ab fe ff ff 4c 89 ef e8 14 cf 35 00 e9 23 fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 34 24 <65> 48 8b 04 25 80 df 01 00 65 8b 15 dc 5c 9f 7e 81 e2 00 01 1f 00 RSP: 0018:ffff88803fc578e8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000002 RBX: ffff8880b3a57cd4 RCX: ffffffff8387c086 RDX: 0000000000000000 RSI: ffffffff8387c092 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000001 R13: ffff88803fc57960 R14: 0000000000000000 R15: dffffc0000000000 nla_parse+0x1b2/0x290 lib/nlattr.c:272 nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:545 [inline] nfnetlink_rcv+0x3b5/0x420 net/netfilter/nfnetlink.c:563 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x6bb/0xc40 net/netlink/af_netlink.c:1911 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2225 __sys_sendmsg net/socket.c:2263 [inline] __do_sys_sendmsg net/socket.c:2272 [inline] __se_sys_sendmsg net/socket.c:2270 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2270 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665e9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2fda97a188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665e9 RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000004 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038 R13: 00007ffdd7d0eaaf R14: 00007f2fda97a300 R15: 0000000000022000 The buggy address belongs to the page: page:ffffea0000ff15c0 count:0 mapcount:0 mapping:0000000000000000 index:0x0 flags: 0xfff00000000000() raw: 00fff00000000000 0000000000000000 ffffffff00ff0101 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88803fc57780: f2 f2 f2 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88803fc57800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88803fc57880: 00 00 00 00 f3 f3 f3 f3 f3 f3 f3 f3 f3 00 00 00 ^ ffff88803fc57900: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 f3 f3 ffff88803fc57980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================