[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 61.066642][ T26] audit: type=1800 audit(1564555813.421:25): pid=9013 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 61.114851][ T26] audit: type=1800 audit(1564555813.421:26): pid=9013 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 61.146717][ T26] audit: type=1800 audit(1564555813.421:27): pid=9013 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.81' (ECDSA) to the list of known hosts. syzkaller login: [ 1545.569936][ T9166] IPVS: ftp: loaded support on port[0] = 21 [ 1545.627409][ T9166] chnl_net:caif_netlink_parms(): no params data found [ 1545.652556][ T9166] bridge0: port 1(bridge_slave_0) entered blocking state [ 1545.661281][ T9166] bridge0: port 1(bridge_slave_0) entered disabled state [ 1545.669815][ T9166] device bridge_slave_0 entered promiscuous mode [ 1545.678198][ T9166] bridge0: port 2(bridge_slave_1) entered blocking state [ 1545.685880][ T9166] bridge0: port 2(bridge_slave_1) entered disabled state [ 1545.693562][ T9166] device bridge_slave_1 entered promiscuous mode [ 1545.709756][ T9166] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 1545.720168][ T9166] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 1545.739163][ T9166] team0: Port device team_slave_0 added [ 1545.746212][ T9166] team0: Port device team_slave_1 added [ 1545.826831][ T9166] device hsr_slave_0 entered promiscuous mode [ 1545.895985][ T9166] device hsr_slave_1 entered promiscuous mode [ 1545.973928][ T9166] bridge0: port 2(bridge_slave_1) entered blocking state [ 1545.981452][ T9166] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1545.989350][ T9166] bridge0: port 1(bridge_slave_0) entered blocking state [ 1545.996530][ T9166] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1546.031206][ T9166] 8021q: adding VLAN 0 to HW filter on device bond0 [ 1546.043278][ T3714] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 1546.064259][ T3714] bridge0: port 1(bridge_slave_0) entered disabled state [ 1546.074812][ T3714] bridge0: port 2(bridge_slave_1) entered disabled state [ 1546.084081][ T3714] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 1546.097272][ T9166] 8021q: adding VLAN 0 to HW filter on device team0 [ 1546.109353][ T9171] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 1546.119675][ T9171] bridge0: port 1(bridge_slave_0) entered blocking state [ 1546.127117][ T9171] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1546.152018][ T9166] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 1546.163537][ T9166] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 1546.178906][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 1546.189948][ T17] bridge0: port 2(bridge_slave_1) entered blocking state [ 1546.197917][ T17] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1546.210587][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 1546.220276][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 1546.230268][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 1546.240757][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready executing program [ 1546.250486][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 1546.260541][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 1546.277883][ T9166] 8021q: adding VLAN 0 to HW filter on device batadv0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 1704.705023][ C1] ------------[ cut here ]------------ [ 1704.710997][ C1] refcount_t: increment on 0; use-after-free. [ 1704.717411][ C1] WARNING: CPU: 1 PID: 0 at lib/refcount.c:156 refcount_inc_checked+0x61/0x70 [ 1704.717521][T12298] ================================================================== [ 1704.726280][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 1704.726305][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.2.0+ #67 [ 1704.734473][T12298] BUG: KASAN: use-after-free in refcount_inc_not_zero_checked+0x81/0x200 [ 1704.741062][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1704.748053][T12298] Read of size 4 at addr ffff8880a850a5c0 by task syz-executor818/12298 [ 1704.756462][ C1] Call Trace: [ 1704.766535][T12298] [ 1704.780487][ C1] [ 1704.783429][ C1] dump_stack+0x172/0x1f0 [ 1704.787796][ C1] ? refcount_inc_not_zero_checked+0x1f0/0x200 [ 1704.794012][ C1] panic+0x2dc/0x755 [ 1704.797933][ C1] ? add_taint.cold+0x16/0x16 [ 1704.802650][ C1] ? __kasan_check_write+0x14/0x20 [ 1704.807790][ C1] ? __warn.cold+0x5/0x4c [ 1704.812217][ C1] ? __warn+0xe7/0x1e0 [ 1704.816315][ C1] ? refcount_inc_checked+0x61/0x70 [ 1704.821546][ C1] __warn.cold+0x20/0x4c [ 1704.825813][ C1] ? vprintk_emit+0x1ea/0x700 [ 1704.830605][ C1] ? refcount_inc_checked+0x61/0x70 [ 1704.835831][ C1] report_bug+0x263/0x2b0 [ 1704.840190][ C1] do_error_trap+0x11b/0x200 [ 1704.844813][ C1] do_invalid_op+0x37/0x50 [ 1704.849272][ C1] ? refcount_inc_checked+0x61/0x70 [ 1704.854551][ C1] invalid_op+0x14/0x20 [ 1704.858732][ C1] RIP: 0010:refcount_inc_checked+0x61/0x70 [ 1704.864655][ C1] Code: 1d 7f 6e 64 06 31 ff 89 de e8 cb d2 35 fe 84 db 75 dd e8 82 d1 35 fe 48 c7 c7 40 09 c6 87 c6 05 5f 6e 64 06 01 e8 77 39 07 fe <0f> 0b eb c1 90 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 41 57 41 [ 1704.884364][ C1] RSP: 0018:ffff8880ae909bf0 EFLAGS: 00010282 [ 1704.890448][ C1] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 1704.898442][ C1] RDX: 0000000000000100 RSI: ffffffff815c3a26 RDI: ffffed1015d21370 [ 1704.906438][ C1] RBP: ffff8880ae909c00 R08: ffff8880a98cc340 R09: fffffbfff14a7757 [ 1704.914429][ C1] R10: fffffbfff14a7756 R11: ffffffff8a53bab7 R12: ffff8880a850a5c0 [ 1704.922509][ C1] R13: ffff8880a850a5a8 R14: ffff88808d182cc8 R15: ffff88808d182ca0 [ 1704.930528][ C1] ? vprintk_func+0x86/0x189 [ 1704.936076][ C1] nr_insert_socket+0x2d/0xe0 [ 1704.940974][ C1] nr_rx_frame+0x1605/0x1e73 [ 1704.945628][ C1] nr_loopback_timer+0x7b/0x170 [ 1704.950511][ C1] call_timer_fn+0x1ac/0x780 [ 1704.955740][ C1] ? nr_process_rx_frame+0x1540/0x1540 [ 1704.961237][ C1] ? msleep_interruptible+0x150/0x150 [ 1704.966660][ C1] ? run_timer_softirq+0x685/0x17a0 [ 1704.972627][ C1] ? trace_hardirqs_on+0x67/0x240 [ 1704.977673][ C1] ? __kasan_check_read+0x11/0x20 [ 1704.982744][ C1] ? nr_process_rx_frame+0x1540/0x1540 [ 1704.988236][ C1] ? nr_process_rx_frame+0x1540/0x1540 [ 1704.993747][ C1] run_timer_softirq+0x697/0x17a0 [ 1704.998818][ C1] ? add_timer+0x930/0x930 [ 1705.003259][ C1] ? kvm_clock_read+0x18/0x30 [ 1705.007965][ C1] ? kvm_sched_clock_read+0x9/0x20 [ 1705.013107][ C1] ? sched_clock+0x2e/0x50 [ 1705.017541][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 1705.023845][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 1705.030118][ C1] __do_softirq+0x262/0x98c [ 1705.034647][ C1] ? sched_clock_cpu+0x1b/0x1b0 [ 1705.039561][ C1] irq_exit+0x19b/0x1e0 [ 1705.043830][ C1] smp_apic_timer_interrupt+0x1a3/0x610 [ 1705.049401][ C1] apic_timer_interrupt+0xf/0x20 [ 1705.054347][ C1] [ 1705.057335][ C1] RIP: 0010:native_safe_halt+0xe/0x10 [ 1705.062730][ C1] Code: 68 96 73 fa eb 8a 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d e4 26 4f 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d d4 26 4f 00 fb f4 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 be 57 27 fa e8 79 [ 1705.082620][ C1] RSP: 0018:ffff8880a98dfd68 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 1705.091074][ C1] RAX: 1ffffffff11a5e05 RBX: ffff8880a98cc340 RCX: 0000000000000000 [ 1705.099066][ C1] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff8880a98ccbcc [ 1705.107080][ C1] RBP: ffff8880a98dfd98 R08: ffff8880a98cc340 R09: 0000000000000000 [ 1705.115071][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 1705.123061][ C1] R13: ffffffff89a4f7b8 R14: 0000000000000000 R15: 0000000000000001 [ 1705.131170][ C1] ? default_idle+0x4e/0x360 [ 1705.135825][ C1] arch_cpu_idle+0xa/0x10 [ 1705.140218][ C1] default_idle_call+0x84/0xb0 [ 1705.145026][ C1] do_idle+0x413/0x760 [ 1705.149149][ C1] ? arch_cpu_idle_exit+0x80/0x80 [ 1705.154217][ C1] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 1705.160059][ C1] ? complete+0x61/0x80 [ 1705.164340][ C1] cpu_startup_entry+0x1b/0x20 [ 1705.169165][ C1] start_secondary+0x315/0x430 [ 1705.173958][ C1] ? set_cpu_sibling_map+0x2180/0x2180 [ 1705.179452][ C1] secondary_startup_64+0xa4/0xb0 [ 1705.184517][T12298] CPU: 0 PID: 12298 Comm: syz-executor818 Not tainted 5.2.0+ #67 [ 1705.192288][T12298] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1705.202644][T12298] Call Trace: [ 1705.205971][T12298] dump_stack+0x172/0x1f0 [ 1705.210324][T12298] ? refcount_inc_not_zero_checked+0x81/0x200 [ 1705.216436][T12298] print_address_description.cold+0xd4/0x306 [ 1705.222452][T12298] ? refcount_inc_not_zero_checked+0x81/0x200 [ 1705.228567][T12298] ? refcount_inc_not_zero_checked+0x81/0x200 [ 1705.234660][T12298] __kasan_report.cold+0x1b/0x36 [ 1705.239621][T12298] ? refcount_inc_not_zero_checked+0x81/0x200 [ 1705.245718][T12298] kasan_report+0x12/0x17 [ 1705.250079][T12298] check_memory_region+0x134/0x1a0 [ 1705.255215][T12298] __kasan_check_read+0x11/0x20 [ 1705.260097][T12298] refcount_inc_not_zero_checked+0x81/0x200 [ 1705.266014][T12298] ? refcount_dec_and_mutex_lock+0x90/0x90 [ 1705.271935][T12298] ? __kasan_check_write+0x14/0x20 [ 1705.277246][T12298] refcount_inc_checked+0x17/0x70 [ 1705.282306][T12298] nr_release+0x62/0x3e0 [ 1705.286636][T12298] __sock_release+0xce/0x280 [ 1705.291264][T12298] sock_close+0x1e/0x30 [ 1705.295440][T12298] __fput+0x2ff/0x890 [ 1705.299463][T12298] ? __sock_release+0x280/0x280 [ 1705.304337][T12298] ____fput+0x16/0x20 [ 1705.308338][T12298] task_work_run+0x145/0x1c0 [ 1705.312959][T12298] exit_to_usermode_loop+0x316/0x380 [ 1705.318291][T12298] do_syscall_64+0x5a9/0x6a0 [ 1705.322908][T12298] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1705.328816][T12298] RIP: 0033:0x408631 [ 1705.332745][T12298] Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 24 1a 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 [ 1705.352365][T12298] RSP: 002b:00007ffe7f0cf850 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 1705.365481][T12298] RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000408631 [ 1705.374123][T12298] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 1705.382159][T12298] RBP: 00000000006e5a1c R08: 00000000004b23eb R09: 00000000004b23eb [ 1705.390149][T12298] R10: 00007ffe7f0cf880 R11: 0000000000000293 R12: 00000000006e5a10 [ 1705.398143][T12298] R13: 0000000000000001 R14: 000000000000002d R15: 20c49ba5e353f7cf [ 1705.406146][T12298] [ 1705.408500][T12298] Allocated by task 0: [ 1705.412766][T12298] save_stack+0x23/0x90 [ 1705.416943][T12298] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 1705.422718][T12298] kasan_kmalloc+0x9/0x10 [ 1705.427071][T12298] __kmalloc+0x163/0x770 [ 1705.431336][T12298] sk_prot_alloc+0x23a/0x310 [ 1705.436031][T12298] sk_alloc+0x39/0xf70 [ 1705.440156][T12298] nr_rx_frame+0x733/0x1e73 [ 1705.444688][T12298] nr_loopback_timer+0x7b/0x170 [ 1705.449561][T12298] call_timer_fn+0x1ac/0x780 [ 1705.454176][T12298] run_timer_softirq+0x697/0x17a0 [ 1705.459236][T12298] __do_softirq+0x262/0x98c [ 1705.463962][T12298] [ 1705.466314][T12298] Freed by task 12300: [ 1705.470398][T12298] save_stack+0x23/0x90 [ 1705.474579][T12298] __kasan_slab_free+0x102/0x150 [ 1705.481054][T12298] kasan_slab_free+0xe/0x10 [ 1705.485578][T12298] kfree+0x10a/0x2c0 [ 1705.489491][T12298] __sk_destruct+0x4f7/0x6e0 [ 1705.494280][T12298] sk_destruct+0x86/0xa0 [ 1705.498550][T12298] __sk_free+0xfb/0x360 [ 1705.502726][T12298] sk_free+0x42/0x50 [ 1705.506728][T12298] sock_efree+0x61/0x80 [ 1705.510907][T12298] skb_release_head_state+0xeb/0x250 [ 1705.516217][T12298] skb_release_all+0x16/0x60 [ 1705.520831][T12298] kfree_skb+0x101/0x3c0 [ 1705.525095][T12298] nr_accept+0x56e/0x700 [ 1705.530924][T12298] __sys_accept4+0x34e/0x6a0 [ 1705.535552][T12298] __x64_sys_accept+0x75/0xb0 [ 1705.540243][T12298] do_syscall_64+0xfd/0x6a0 [ 1705.544765][T12298] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1705.551526][T12298] [ 1705.553867][T12298] The buggy address belongs to the object at ffff8880a850a540 [ 1705.553867][T12298] which belongs to the cache kmalloc-2k of size 2048 [ 1705.567957][T12298] The buggy address is located 128 bytes inside of [ 1705.567957][T12298] 2048-byte region [ffff8880a850a540, ffff8880a850ad40) [ 1705.581417][T12298] The buggy address belongs to the page: [ 1705.587064][T12298] page:ffffea0002a14280 refcount:1 mapcount:0 mapping:ffff8880aa400e00 index:0x0 compound_mapcount: 0 [ 1705.598010][T12298] flags: 0x1fffc0000010200(slab|head) [ 1705.603574][T12298] raw: 01fffc0000010200 ffffea0002348f88 ffffea0002a16788 ffff8880aa400e00 [ 1705.612180][T12298] raw: 0000000000000000 ffff8880a850a540 0000000100000003 0000000000000000 [ 1705.620771][T12298] page dumped because: kasan: bad access detected [ 1705.627284][T12298] [ 1705.629608][T12298] Memory state around the buggy address: [ 1705.635244][T12298] ffff8880a850a480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 1705.643413][T12298] ffff8880a850a500: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 1705.651501][T12298] >ffff8880a850a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1705.659592][T12298] ^ [ 1705.665765][T12298] ffff8880a850a600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1705.674019][T12298] ffff8880a850a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1705.682170][T12298] ================================================================== [ 1705.690239][T12298] Disabling lock debugging due to kernel taint [ 1705.697398][ C1] Kernel Offset: disabled [ 1705.701750][ C1] Rebooting in 86400 seconds..