kasan: CONFIG_KASAN_INLINE enabled kernel tried to execute NX-protected page - exploit attempt? (uid: 0) kasan: GPF could be caused by NULL-ptr deref or user memory access BUG: unable to handle kernel paging request at ffff88808a474580 #PF error: [PROT] [INSTR] PGD c201067 P4D c201067 PUD 21ffff067 PMD a9617063 PTE 800000008a474163 Oops: 0011 [#1] PREEMPT SMP KASAN CPU: 0 PID: 8541 Comm: kworker/u4:6 Not tainted 4.20.0-rc7-next-20181224 #1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:0xffff88808a474580 Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 80 63 6c 6d 80 88 RSP: 0018:ffff8880ae6079b0 EFLAGS: 00010006 RAX: ffff88808a474580 RBX: ffff8880a9487928 RCX: ffffffff816ea433 RDX: 0000000000000100 RSI: ffffffff816e9f25 RDI: ffff8880a9487928 RBP: ffff8880ae607b00 R08: ffff8880972642c0 R09: ffffed1015cc5b90 R10: ffffed1015cc5b8f R11: ffff8880ae62dc7b R12: ffff8880ae607ad8 R13: 0000000000000100 R14: 0000000000000000 R15: ffff8880ae623bc0 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff88808a474580 CR3: 000000006b884000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: expire_timers kernel/time/timer.c:1358 [inline] __run_timers+0x4a2/0xd50 kernel/time/timer.c:1681 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1694 __do_softirq+0x30b/0xb11 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1b7/0x760 arch/x86/kernel/apic/apic.c:1062 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:should_resched arch/x86/include/asm/preempt.h:102 [inline] RIP: 0010:__local_bh_enable_ip+0x18e/0x270 kernel/softirq.c:196 Code: 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 df 00 00 00 48 83 3d 2f 8e 45 08 00 0f 84 8f 00 00 00 fb 66 0f 1f 44 00 00 <65> 8b 05 6b 2d b5 7e 85 c0 74 7f 5b 41 5c 41 5d 5d c3 80 3d 29 33 RSP: 0018:ffff888069327750 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13249d0 RBX: 0000000000000201 RCX: 1ffff11012e4c971 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff888097264b3c RBP: ffff888069327768 R08: 0000000000000006 R09: ffff888097264b88 R10: ffff8880972642c0 R11: 0000000000000000 R12: ffffffff87d30a5d R13: ffff8880972642c0 R14: 000000000000006f R15: dffffc0000000000 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline] _raw_spin_unlock_bh+0x31/0x40 kernel/locking/spinlock.c:200 spin_unlock_bh include/linux/spinlock.h:374 [inline] batadv_nc_purge_paths+0x36d/0x530 net/batman-adv/network-coding.c:482 batadv_nc_worker+0x3ae/0x920 net/batman-adv/network-coding.c:731 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Modules linked in: CR2: ffff88808a474580 ---[ end trace 9f3756620ea64638 ]--- general protection fault: 0000 [#2] PREEMPT SMP KASAN CPU: 1 PID: 3 Comm: Tainted: G D 4.20.0-rc7-next-20181224 #1 RIP: 0010:0xffff88808a474580 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 80 63 6c 6d 80 88 RIP: 0010:__read_once_size include/linux/compiler.h:191 [inline] RIP: 0010:get_running_cputimer include/linux/sched/cputime.h:85 [inline] RIP: 0010:account_group_system_time include/linux/sched/cputime.h:149 [inline] RIP: 0010:account_system_index_time+0xe8/0x5f0 kernel/sched/cputime.c:168 RSP: 0018:ffff8880ae6079b0 EFLAGS: 00010006 Code: 04 00 00 49 8b 84 24 00 07 00 00 48 ba 00 00 00 00 00 fc ff df 48 8d b8 40 01 00 00 48 8d 88 28 01 00 00 48 89 fe 48 c1 ee 03 <0f> b6 14 16 48 89 fe 83 e6 07 40 38 f2 7f 08 84 d2 0f 85 93 03 00 RAX: ffff88808a474580 RBX: ffff8880a9487928 RCX: ffffffff816ea433 RSP: 0018:ffff8880ae707a80 EFLAGS: 00010006 RDX: 0000000000000100 RSI: ffffffff816e9f25 RDI: ffff8880a9487928 RAX: 0000000041b58ab3 RBX: 1ffff11015ce0f54 RCX: 0000000041b58bdb RBP: ffff8880ae607b00 R08: ffff8880972642c0 R09: ffffed1015cc5b90 RDX: dffffc0000000000 RSI: 000000000836b17e RDI: 0000000041b58bf3 R10: ffffed1015cc5b8f R11: ffff8880ae62dc7b R12: ffff8880ae607ad8 RBP: ffff8880ae707b48 R08: ffff8880ae71f5f0 R09: fffffbfff1335b3d R13: 0000000000000100 R14: 0000000000000000 R15: ffff8880ae623bc0 R10: fffffbfff1301b45 R11: ffffffff899ad9e3 R12: ffff8880a94c4440 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 R13: 0000000000251b9a R14: 0000000000000003 R15: ffff8880ae707b20 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CR2: ffff88808a474580 CR3: 000000006b884000 CR4: 00000000001406f0 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 CR2: 00007fba193dedb8 CR3: 000000009aaf9000 CR4: 00000000001406e0 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000