================================================================== BUG: KASAN: stack-out-of-bounds in __enqueue_entity+0x133/0x1f0 kernel/sched/fair.c:545 Read of size 8 at addr ffff8801b42f92a0 by task udevd/20299 kasan: CONFIG_KASAN_INLINE enabled CPU: 0 PID: 20299 Comm: udevd Not tainted 4.18.0-rc3+ #53 kasan: GPF could be caused by NULL-ptr deref or user memory access Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 general protection fault: 0000 [#1] SMP KASAN Call Trace: CPU: 1 PID: -2000753008 Comm: Not tainted 4.18.0-rc3+ #53 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:update_curr+0xa2/0xc00 kernel/sched/fair.c:806 Code: 40 14 00 f2 print_address_description+0x6c/0x20b mm/kasan/report.c:256 f2 f2 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412 c7 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 40 __enqueue_entity+0x133/0x1f0 kernel/sched/fair.c:545 18 put_prev_entity+0xbf/0x2a0 kernel/sched/fair.c:4486 f2 put_prev_task_fair+0x3e/0x80 kernel/sched/fair.c:7044 f2 put_prev_task kernel/sched/sched.h:1535 [inline] pick_next_task_stop+0xc0/0x1f0 kernel/sched/stop_task.c:34 f2 pick_next_task kernel/sched/core.c:3363 [inline] __schedule+0x1401/0x1ed0 kernel/sched/core.c:3478 f2 c7 40 1c 00 f2 f2 f2 65 preempt_schedule_common+0x22/0x60 kernel/sched/core.c:3628 48 _cond_resched+0x1d/0x30 kernel/sched/core.c:4994 8b stop_one_cpu+0x173/0x240 kernel/stop_machine.c:133 04 25 28 00 00 00 48 89 sched_exec+0x1bf/0x2a0 kernel/sched/core.c:2995 45 d0 31 __do_execve_file.isra.36+0xb50/0x2730 fs/exec.c:1760 c0 48 89 f8 48 c1 e8 03 <80> 3c 10 00 0f 85 0f 09 00 00 49 do_execveat_common fs/exec.c:1866 [inline] do_execve fs/exec.c:1883 [inline] __do_sys_execve fs/exec.c:1964 [inline] __se_sys_execve fs/exec.c:1959 [inline] __x64_sys_execve+0x8f/0xc0 fs/exec.c:1959 8d do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 bf 70 01 00 00 49 8b 5f 40 entry_SYSCALL_64_after_hwframe+0x49/0xbe 48 RIP: 0033:0x7f908868c207 Code: RSP: 0018:ffff8801daf07828 EFLAGS: 00010002 77 19 RAX: 0000000000000008 RBX: dffffc0000000000 RCX: 1ffffffff0fd511b f4 RDX: dffffc0000000000 RSI: ffff8801b20b6640 RDI: 0000000000000040 48 RBP: ffff8801daf07990 R08: ffff88021fff8058 R09: ffff88021fff805b 89 R10: ffffed0043fff009 R11: 0000000000000000 R12: 1ffff1003b5e0f09 d7 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 44 FS: 00000000017b4940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 89 c0 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 0f 05 CR2: 00007f17d1827848 CR3: 0000000199451000 CR4: 00000000001406e0 48 DR0: 00000000200001c0 DR1: 0000000020000080 DR2: 0000000000000000 3d DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 00 Call Trace: f0 ff ff 76 e0 f7 d8 64 entity_tick kernel/sched/fair.c:4499 [inline] task_tick_fair+0xdb/0x320 kernel/sched/fair.c:9934 41 scheduler_tick+0x18b/0x430 kernel/sched/core.c:3087 89 01 eb d8 f7 d8 64 update_process_times+0x51/0x70 kernel/time/timer.c:1641 41 tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:164 89 tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1274 01 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0x3eb/0x10c0 kernel/time/hrtimer.c:1460 eb df b8 3b 00 00 00 0f 05 <48> 3d 00 hrtimer_interrupt+0x2f3/0x750 kernel/time/hrtimer.c:1518 f0 ff local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline] smp_apic_timer_interrupt+0x165/0x730 arch/x86/kernel/apic/apic.c:1050 ff 77 02 f3 c3 48 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:863 8b 15 Modules linked in: 00 8c Dumping ftrace buffer: 2d (ftrace buffer empty) 00 f7 ---[ end trace 477eb5a7e89bc623 ]--- d8 RIP: 0010:update_curr+0xa2/0xc00 kernel/sched/fair.c:806 64 Code: 89 40 02 14 00 f2 RSP: 002b:00007ffcc4d0d7d8 EFLAGS: 00000206 f2 f2 ORIG_RAX: 000000000000003b c7 RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f908868c207 40 RDX: 00000000010b7540 RSI: 00007ffcc4d0d8d0 RDI: 00007ffcc4d0e8e0 18 RBP: 0000000000625500 R08: 0000000000000ac4 R09: 0000000000000ac4 f2 f2 f2 R10: 0000000000000000 R11: 0000000000000206 R12: 00000000010b7540 f2 R13: 0000000000000007 R14: 00000000010a6250 R15: 0000000000000005 c7 40 1c Allocated by task 0: 00 (stack is not available) f2 f2 Freed by task 5412: f2 save_stack+0x43/0xd0 mm/kasan/kasan.c:448 65 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521 48 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 8b __cache_free mm/slab.c:3498 [inline] kfree+0xd9/0x260 mm/slab.c:3813 04 skb_free_head+0x99/0xc0 net/core/skbuff.c:550 25 28 skb_release_data+0x6a4/0x880 net/core/skbuff.c:570 00 skb_release_all+0x4a/0x60 net/core/skbuff.c:627 00 __kfree_skb net/core/skbuff.c:641 [inline] consume_skb+0x193/0x560 net/core/skbuff.c:701 00 netlink_broadcast_filtered+0x6aa/0x1620 net/netlink/af_netlink.c:1512 48 netlink_broadcast net/netlink/af_netlink.c:1534 [inline] nlmsg_multicast include/net/netlink.h:591 [inline] nlmsg_notify+0xa0/0x1a0 net/netlink/af_netlink.c:2491 89 rtnl_notify+0xce/0xf0 net/core/rtnetlink.c:732 45 rtmsg_fib+0x369/0x4d0 net/ipv4/fib_semantics.c:428 d0 fib_table_insert+0x7a8/0x17a0 net/ipv4/fib_trie.c:1287 31 c0 fib_magic.isra.22+0x66b/0x890 net/ipv4/fib_frontend.c:885 48 fib_add_ifaddr+0x382/0x500 net/ipv4/fib_frontend.c:920 89 fib_netdev_event+0x13c/0x3a0 net/ipv4/fib_frontend.c:1263 f8 48 notifier_call_chain+0x180/0x390 kernel/notifier.c:93 c1 __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401 e8 call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1734 03 call_netdevice_notifiers net/core/dev.c:1752 [inline] __dev_notify_flags+0x17a/0x480 net/core/dev.c:7335 <80> dev_change_flags+0xfd/0x150 net/core/dev.c:7371 3c do_setlink+0xb16/0x3dd0 net/core/rtnetlink.c:2413 10 rtnl_newlink+0x138d/0x1d60 net/core/rtnetlink.c:3023 00 0f rtnetlink_rcv_msg+0x46e/0xc30 net/core/rtnetlink.c:4699 85 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2448 0f rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:4717 09 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x5a0/0x760 net/netlink/af_netlink.c:1336 00 netlink_sendmsg+0xa18/0xfc0 net/netlink/af_netlink.c:1901 00 sock_sendmsg_nosec net/socket.c:641 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:651 49 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2125 8d __sys_sendmsg+0x11d/0x290 net/socket.c:2163 bf 70 __do_sys_sendmsg net/socket.c:2172 [inline] __se_sys_sendmsg net/socket.c:2170 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2170 01 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 00 entry_SYSCALL_64_after_hwframe+0x49/0xbe 00 49 The buggy address belongs to the object at ffff8801b42f9280 which belongs to the cache kmalloc-512 of size 512 8b The buggy address is located 32 bytes inside of 512-byte region [ffff8801b42f9280, ffff8801b42f9480) 5f The buggy address belongs to the page: 40 page:ffffea0006d0be40 count:1 mapcount:0 mapping:ffff8801da800940 index:0xffff8801b42f9c80 48 RSP: 0018:ffff8801daf07828 EFLAGS: 00010002 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffffea0006b45c88 ffffea0006ad5408 ffff8801da800940 raw: ffff8801b42f9c80 ffff8801b42f9000 0000000100000004 0000000000000000 RAX: 0000000000000008 RBX: dffffc0000000000 RCX: 1ffffffff0fd511b page dumped because: kasan: bad access detected RDX: dffffc0000000000 RSI: ffff8801b20b6640 RDI: 0000000000000040 RBP: ffff8801daf07990 R08: ffff88021fff8058 R09: ffff88021fff805b Memory state around the buggy address: R10: ffffed0043fff009 R11: 0000000000000000 R12: 1ffff1003b5e0f09 ffff8801b42f9180: f1 f1 f1 00 f2 f2 f2 f2 f2 f2 f2 00 f2 f2 f2 f2 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ffff8801b42f9200: f2 f2 f2 00 f2 f2 f2 f2 f2 f2 f2 f8 f2 f2 f2 f2 FS: 00000000017b4940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 >ffff8801b42f9280: f2 f2 f2 00 f2 f2 f2 00 00 00 00 00 00 00 00 00 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 ^ CR2: 00007f17d1827848 CR3: 0000000199451000 CR4: 00000000001406e0 ffff8801b42f9300: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 DR0: 00000000200001c0 DR1: 0000000020000080 DR2: 0000000000000000 ffff8801b42f9380: 00 f2 f2 f2 f2 f2 f2 f2 00 f2 f2 f2 f2 f2 f2 f2 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 ==================================================================