[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 1039.585910][ T8472] cron (8472) used greatest stack depth: 22336 bytes left Warning: Permanently added '10.128.1.47' (ECDSA) to the list of known hosts. 2021/06/18 20:26:01 parsed 1 programs 2021/06/18 20:26:01 executed programs: 0 [ 1580.819364][ T8499] chnl_net:caif_netlink_parms(): no params data found [ 1580.878866][ T8499] bridge0: port 1(bridge_slave_0) entered blocking state [ 1580.888639][ T8499] bridge0: port 1(bridge_slave_0) entered disabled state [ 1580.899079][ T8499] device bridge_slave_0 entered promiscuous mode [ 1580.911498][ T8499] bridge0: port 2(bridge_slave_1) entered blocking state [ 1580.919514][ T8499] bridge0: port 2(bridge_slave_1) entered disabled state [ 1580.929695][ T8499] device bridge_slave_1 entered promiscuous mode [ 1580.955297][ T8499] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 1580.968466][ T8499] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 1580.995350][ T8499] team0: Port device team_slave_0 added [ 1581.004367][ T8499] team0: Port device team_slave_1 added [ 1581.025659][ T8499] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 1581.034505][ T8499] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 1581.064678][ T8499] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 1581.080468][ T8499] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 1581.089117][ T8499] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 1581.115685][ T8499] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 1581.147480][ T8499] device hsr_slave_0 entered promiscuous mode [ 1581.154790][ T8499] device hsr_slave_1 entered promiscuous mode [ 1581.273985][ T8499] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 1581.285682][ T8499] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 1581.296355][ T8499] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 1581.309759][ T8499] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 1581.338112][ T8499] bridge0: port 2(bridge_slave_1) entered blocking state [ 1581.345991][ T8499] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1581.354620][ T8499] bridge0: port 1(bridge_slave_0) entered blocking state [ 1581.362052][ T8499] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1581.415765][ T8499] 8021q: adding VLAN 0 to HW filter on device bond0 [ 1581.432513][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 1581.444918][ T8] bridge0: port 1(bridge_slave_0) entered disabled state [ 1581.455011][ T8] bridge0: port 2(bridge_slave_1) entered disabled state [ 1581.464328][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 1581.479978][ T8499] 8021q: adding VLAN 0 to HW filter on device team0 [ 1581.492970][ T8640] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 1581.503194][ T8640] bridge0: port 1(bridge_slave_0) entered blocking state [ 1581.510359][ T8640] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1581.529537][ T8640] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 1581.539367][ T8640] bridge0: port 2(bridge_slave_1) entered blocking state [ 1581.546953][ T8640] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1581.571452][ T8723] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 1581.580815][ T8723] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 1581.590133][ T8723] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 1581.599106][ T8723] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 1581.613652][ T4082] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 1581.626148][ T8499] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 1581.650916][ T8723] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 1581.659354][ T8723] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 1581.674556][ T8499] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 1581.698161][ T8723] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 1581.721066][ T4082] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 1581.730985][ T4082] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 1581.740275][ T4082] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 1581.753610][ T8499] device veth0_vlan entered promiscuous mode [ 1581.768540][ T8499] device veth1_vlan entered promiscuous mode [ 1581.787552][ T4082] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 1581.798568][ T4082] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 1581.816228][ T8723] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 1581.825859][ T8723] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 1581.839836][ T8499] device veth0_macvtap entered promiscuous mode [ 1581.851720][ T8499] device veth1_macvtap entered promiscuous mode [ 1581.875937][ T8499] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 1581.883744][ T4082] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 1581.893705][ T4082] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 1581.903786][ T4082] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 1581.913589][ T4082] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 1581.929857][ T8499] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 1581.939419][ T8724] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 1581.949415][ T8724] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 1581.964298][ T8499] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 1581.978928][ T8499] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 1581.988246][ T8499] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 1581.998623][ T8499] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 1582.112571][ T172] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 1582.122049][ T172] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 1582.167823][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 1582.184384][ T172] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 1582.193699][ T172] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 1582.205997][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 1582.588052][ T8722] Bluetooth: hci0: command 0x0409 tx timeout 2021/06/18 20:26:06 executed programs: 50 [ 1584.667918][ T8722] Bluetooth: hci0: command 0x041b tx timeout [ 1586.747578][ T8471] Bluetooth: hci0: command 0x040f tx timeout [ 1588.827035][ T8722] Bluetooth: hci0: command 0x0419 tx timeout 2021/06/18 20:26:11 executed programs: 187 2021/06/18 20:26:16 executed programs: 333 2021/06/18 20:26:21 executed programs: 477 2021/06/18 20:26:26 executed programs: 620 [ 1607.149207][ T3251] ieee802154 phy0 wpan0: encryption failed: -22 [ 1607.156958][ T3251] ieee802154 phy1 wpan1: encryption failed: -22 2021/06/18 20:26:31 executed programs: 764 2021/06/18 20:26:36 executed programs: 905 2021/06/18 20:26:41 executed programs: 1050 2021/06/18 20:26:46 executed programs: 1191 2021/06/18 20:26:51 executed programs: 1332 2021/06/18 20:26:56 executed programs: 1471 2021/06/18 20:27:01 executed programs: 1615 2021/06/18 20:27:06 executed programs: 1753 2021/06/18 20:27:11 executed programs: 1905 2021/06/18 20:27:16 executed programs: 2046 2021/06/18 20:27:21 executed programs: 2193 2021/06/18 20:27:26 executed programs: 2335 [ 1668.598128][ T3251] ieee802154 phy0 wpan0: encryption failed: -22 [ 1668.605261][ T3251] ieee802154 phy1 wpan1: encryption failed: -22 2021/06/18 20:27:31 executed programs: 2479 2021/06/18 20:27:36 executed programs: 2623 2021/06/18 20:27:41 executed programs: 2765 2021/06/18 20:27:46 executed programs: 2911 2021/06/18 20:27:51 executed programs: 3053 2021/06/18 20:27:56 executed programs: 3192 2021/06/18 20:28:01 executed programs: 3331 2021/06/18 20:28:06 executed programs: 3488 [ 1706.507042][ T8471] Bluetooth: hci0: command 0x0406 tx timeout 2021/06/18 20:28:11 executed programs: 3725 2021/06/18 20:28:16 executed programs: 3975 2021/06/18 20:28:21 executed programs: 4207 2021/06/18 20:28:26 executed programs: 4443 2021/06/18 20:28:31 executed programs: 4708 [ 1730.029106][ T3251] ieee802154 phy0 wpan0: encryption failed: -22 [ 1730.037104][ T3251] ieee802154 phy1 wpan1: encryption failed: -22 2021/06/18 20:28:36 executed programs: 4962 2021/06/18 20:28:41 executed programs: 5202 2021/06/18 20:28:46 executed programs: 5463 2021/06/18 20:28:52 executed programs: 5719 2021/06/18 20:28:57 executed programs: 5966 2021/06/18 20:29:02 executed programs: 6228 2021/06/18 20:29:07 executed programs: 6491 2021/06/18 20:29:12 executed programs: 6751 2021/06/18 20:29:17 executed programs: 7014 2021/06/18 20:29:22 executed programs: 7276 2021/06/18 20:29:27 executed programs: 7538 2021/06/18 20:29:32 executed programs: 7819 [ 1791.479008][ T3251] ieee802154 phy0 wpan0: encryption failed: -22 [ 1791.485373][ T3251] ieee802154 phy1 wpan1: encryption failed: -22 2021/06/18 20:29:37 executed programs: 8090 2021/06/18 20:29:42 executed programs: 8338 2021/06/18 20:29:47 executed programs: 8567 2021/06/18 20:29:52 executed programs: 8806 2021/06/18 20:29:57 executed programs: 9034 2021/06/18 20:30:02 executed programs: 9268 2021/06/18 20:30:07 executed programs: 9496 2021/06/18 20:30:12 executed programs: 9732 2021/06/18 20:30:17 executed programs: 9963 2021/06/18 20:30:22 executed programs: 10187 2021/06/18 20:30:27 executed programs: 10407 2021/06/18 20:30:32 executed programs: 10627 [ 1852.914380][ T3251] ieee802154 phy0 wpan0: encryption failed: -22 [ 1852.924566][ T3251] ieee802154 phy1 wpan1: encryption failed: -22 2021/06/18 20:30:37 executed programs: 10856 2021/06/18 20:30:42 executed programs: 11077 2021/06/18 20:30:47 executed programs: 11283 2021/06/18 20:30:52 executed programs: 11485 2021/06/18 20:30:57 executed programs: 11680 2021/06/18 20:31:02 executed programs: 11876 2021/06/18 20:31:07 executed programs: 12083 2021/06/18 20:31:12 executed programs: 12276 2021/06/18 20:31:17 executed programs: 12480 2021/06/18 20:31:22 executed programs: 12679 2021/06/18 20:31:27 executed programs: 12877 2021/06/18 20:31:32 executed programs: 13075 [ 1914.358345][ T3251] ieee802154 phy0 wpan0: encryption failed: -22 [ 1914.365910][ T3251] ieee802154 phy1 wpan1: encryption failed: -22 2021/06/18 20:31:37 executed programs: 13297 2021/06/18 20:31:42 executed programs: 13514 2021/06/18 20:31:47 executed programs: 13730 2021/06/18 20:31:52 executed programs: 13941 2021/06/18 20:31:57 executed programs: 14140 2021/06/18 20:32:02 executed programs: 14334 2021/06/18 20:32:07 executed programs: 14551 2021/06/18 20:32:12 executed programs: 14779 2021/06/18 20:32:17 executed programs: 15003 2021/06/18 20:32:22 executed programs: 15226 2021/06/18 20:32:27 executed programs: 15452 2021/06/18 20:32:32 executed programs: 15676 2021/06/18 20:32:37 executed programs: 15901 [ 1975.799082][ T3251] ieee802154 phy0 wpan0: encryption failed: -22 [ 1975.808407][ T3251] ieee802154 phy1 wpan1: encryption failed: -22 2021/06/18 20:32:42 executed programs: 16128 2021/06/18 20:32:47 executed programs: 16348 2021/06/18 20:32:52 executed programs: 16565 2021/06/18 20:32:57 executed programs: 16781 2021/06/18 20:33:02 executed programs: 17001 2021/06/18 20:33:07 executed programs: 17217 2021/06/18 20:33:12 executed programs: 17443 2021/06/18 20:33:17 executed programs: 17668 2021/06/18 20:33:22 executed programs: 17906 [ 2024.027521][ T12] ================================================================== [ 2024.037976][ T12] BUG: KASAN: use-after-free in check_all_holdout_tasks_trace+0x302/0x420 [ 2024.050873][ T12] Read of size 1 at addr ffff8880294cbc9c by task rcu_tasks_trace/12 [ 2024.060056][ T12] [ 2024.062582][ T12] CPU: 0 PID: 12 Comm: rcu_tasks_trace Not tainted 5.13.0-rc3-syzkaller #0 [ 2024.072444][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 2024.084375][ T12] Call Trace: [ 2024.088777][ T12] dump_stack+0x141/0x1d7 [ 2024.094679][ T12] ? check_all_holdout_tasks_trace+0x302/0x420 [ 2024.101637][ T12] print_address_description.constprop.0.cold+0x5b/0x2f8 [ 2024.110194][ T12] ? check_all_holdout_tasks_trace+0x302/0x420 [ 2024.118090][ T12] ? check_all_holdout_tasks_trace+0x302/0x420 [ 2024.124950][ T12] kasan_report.cold+0x7c/0xd8 [ 2024.130385][ T12] ? check_all_holdout_tasks_trace+0x302/0x420 [ 2024.138641][ T12] check_all_holdout_tasks_trace+0x302/0x420 [ 2024.146128][ T12] ? cpus_read_unlock+0x94/0x120 [ 2024.151464][ T12] ? rcu_tasks_trace_postscan+0x119/0x160 [ 2024.157634][ T12] rcu_tasks_wait_gp+0x594/0xa60 [ 2024.163680][ T12] ? lock_downgrade+0x6e0/0x6e0 [ 2024.169088][ T12] ? trc_inspect_reader+0x250/0x250 [ 2024.175241][ T12] ? _raw_spin_unlock_irqrestore+0x50/0x70 [ 2024.181998][ T12] rcu_tasks_kthread+0x31c/0x6a0 [ 2024.187275][ T12] ? destroy_rcu_head_on_stack+0x10/0x10 [ 2024.193248][ T12] ? finish_wait+0x260/0x260 [ 2024.203547][ T12] ? lockdep_hardirqs_on+0x79/0x100 [ 2024.209934][ T12] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 2024.216795][ T12] ? __kthread_parkme+0x13f/0x1e0 [ 2024.222685][ T12] ? destroy_rcu_head_on_stack+0x10/0x10 [ 2024.229742][ T12] kthread+0x3b1/0x4a0 [ 2024.234323][ T12] ? __kthread_bind_mask+0xc0/0xc0 [ 2024.240256][ T12] ret_from_fork+0x1f/0x30 [ 2024.246953][ T12] [ 2024.249499][ T12] Allocated by task 8499: [ 2024.254077][ T12] kasan_save_stack+0x1b/0x40 [ 2024.259451][ T12] __kasan_slab_alloc+0x84/0xa0 [ 2024.265229][ T12] kmem_cache_alloc_node+0x269/0x3e0 [ 2024.271228][ T12] copy_process+0x5c8/0x7120 [ 2024.276427][ T12] kernel_clone+0xe7/0xab0 [ 2024.281070][ T12] __do_sys_clone+0xc8/0x110 [ 2024.286068][ T12] do_syscall_64+0x3a/0xb0 [ 2024.291365][ T12] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 2024.298050][ T12] [ 2024.300925][ T12] Freed by task 12: [ 2024.304837][ T12] kasan_save_stack+0x1b/0x40 [ 2024.309916][ T12] kasan_set_track+0x1c/0x30 [ 2024.314977][ T12] kasan_set_free_info+0x20/0x30 [ 2024.323363][ T12] __kasan_slab_free+0xfb/0x130 [ 2024.328945][ T12] slab_free_freelist_hook+0xdf/0x240 [ 2024.335215][ T12] kmem_cache_free+0x8a/0x740 [ 2024.340574][ T12] __put_task_struct+0x26f/0x400 [ 2024.346952][ T12] check_all_holdout_tasks_trace+0x179/0x420 [ 2024.354076][ T12] rcu_tasks_wait_gp+0x594/0xa60 [ 2024.365103][ T12] rcu_tasks_kthread+0x31c/0x6a0 [ 2024.371375][ T12] kthread+0x3b1/0x4a0 [ 2024.375970][ T12] ret_from_fork+0x1f/0x30 [ 2024.381945][ T12] [ 2024.384387][ T12] Last potentially related work creation: [ 2024.390687][ T12] kasan_save_stack+0x1b/0x40 [ 2024.396666][ T12] kasan_record_aux_stack+0xe5/0x110 [ 2024.402109][ T12] call_rcu+0xb1/0x750 [ 2024.407304][ T12] put_task_struct_rcu_user+0x7f/0xb0 [ 2024.413037][ T12] release_task+0xca1/0x1690 [ 2024.418110][ T12] wait_consider_task+0x2fb5/0x3b40 [ 2024.424309][ T12] do_wait+0x724/0xd40 [ 2024.429174][ T12] kernel_wait4+0x14c/0x260 [ 2024.435252][ T12] __do_sys_wait4+0x13f/0x150 [ 2024.441161][ T12] do_syscall_64+0x3a/0xb0 [ 2024.446201][ T12] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 2024.453861][ T12] [ 2024.460628][ T12] Second to last potentially related work creation: [ 2024.468091][ T12] kasan_save_stack+0x1b/0x40 [ 2024.474770][ T12] kasan_record_aux_stack+0xe5/0x110 [ 2024.481814][ T12] call_rcu+0xb1/0x750 [ 2024.487790][ T12] put_task_struct_rcu_user+0x7f/0xb0 [ 2024.496818][ T12] release_task+0xca1/0x1690 [ 2024.503182][ T12] wait_consider_task+0x2fb5/0x3b40 [ 2024.509786][ T12] do_wait+0x724/0xd40 [ 2024.516010][ T12] kernel_wait4+0x14c/0x260 [ 2024.521210][ T12] __do_sys_wait4+0x13f/0x150 [ 2024.527597][ T12] do_syscall_64+0x3a/0xb0 [ 2024.532213][ T12] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 2024.539434][ T12] [ 2024.542327][ T12] The buggy address belongs to the object at ffff8880294cb880 [ 2024.542327][ T12] which belongs to the cache task_struct of size 6976 [ 2024.561447][ T12] The buggy address is located 1052 bytes inside of [ 2024.561447][ T12] 6976-byte region [ffff8880294cb880, ffff8880294cd3c0) [ 2024.578626][ T12] The buggy address belongs to the page: [ 2024.585494][ T12] page:ffffea0000a53200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x294c8 [ 2024.597250][ T12] head:ffffea0000a53200 order:3 compound_mapcount:0 compound_pincount:0 [ 2024.606500][ T12] flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) [ 2024.618428][ T12] raw: 00fff00000010200 ffffea00008d6400 0000000200000002 ffff888140005140 [ 2024.629950][ T12] raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 [ 2024.640215][ T12] page dumped because: kasan: bad access detected [ 2024.647350][ T12] page_owner tracks the page as allocated [ 2024.654631][ T12] page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 2, ts 15187628853, free_ts 0 [ 2024.673096][ T12] get_page_from_freelist+0x1034/0x2bf0 [ 2024.678828][ T12] __alloc_pages+0x1b2/0x500 [ 2024.683605][ T12] alloc_pages+0x18c/0x2a0 [ 2024.688174][ T12] allocate_slab+0x32e/0x4c0 [ 2024.692864][ T12] ___slab_alloc+0x4a1/0x810 [ 2024.697716][ T12] __slab_alloc.constprop.0+0xa7/0xf0 [ 2024.703201][ T12] kmem_cache_alloc_node+0x12f/0x3e0 [ 2024.708920][ T12] copy_process+0x5c8/0x7120 [ 2024.713656][ T12] kernel_clone+0xe7/0xab0 [ 2024.718118][ T12] kernel_thread+0xb5/0xf0 [ 2024.722606][ T12] kthreadd+0x52a/0x790 [ 2024.726858][ T12] ret_from_fork+0x1f/0x30 [ 2024.731352][ T12] page_owner free stack trace missing [ 2024.736855][ T12] [ 2024.739222][ T12] Memory state around the buggy address: [ 2024.745306][ T12] ffff8880294cbb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 2024.754036][ T12] ffff8880294cbc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 2024.762588][ T12] >ffff8880294cbc80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 2024.771100][ T12] ^ [ 2024.776358][ T12] ffff8880294cbd00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 2024.784532][ T12] ffff8880294cbd80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 2024.793005][ T12] ================================================================== [ 2024.801306][ T12] Disabling lock debugging due to kernel taint [ 2024.810314][ T12] Kernel panic - not syncing: panic_on_warn set ... [ 2024.817107][ T12] CPU: 1 PID: 12 Comm: rcu_tasks_trace Tainted: G B 5.13.0-rc3-syzkaller #0 [ 2024.827112][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 2024.837956][ T12] Call Trace: [ 2024.841285][ T12] dump_stack+0x141/0x1d7 [ 2024.845652][ T12] panic+0x306/0x73d [ 2024.849685][ T12] ? __warn_printk+0xf3/0xf3 [ 2024.854537][ T12] ? preempt_schedule_common+0x59/0xc0 [ 2024.860427][ T12] ? check_all_holdout_tasks_trace+0x302/0x420 [ 2024.866938][ T12] ? preempt_schedule_thunk+0x16/0x18 [ 2024.872765][ T12] ? trace_hardirqs_on+0x38/0x1c0 [ 2024.878285][ T12] ? trace_hardirqs_on+0x51/0x1c0 [ 2024.883455][ T12] ? check_all_holdout_tasks_trace+0x302/0x420 [ 2024.890000][ T12] ? check_all_holdout_tasks_trace+0x302/0x420 [ 2024.896407][ T12] end_report.cold+0x5a/0x5a [ 2024.901580][ T12] kasan_report.cold+0x6a/0xd8 [ 2024.906821][ T12] ? check_all_holdout_tasks_trace+0x302/0x420 [ 2024.913834][ T12] check_all_holdout_tasks_trace+0x302/0x420 [ 2024.920164][ T12] ? cpus_read_unlock+0x94/0x120 [ 2024.925677][ T12] ? rcu_tasks_trace_postscan+0x119/0x160 [ 2024.931737][ T12] rcu_tasks_wait_gp+0x594/0xa60 [ 2024.937196][ T12] ? lock_downgrade+0x6e0/0x6e0 [ 2024.942103][ T12] ? trc_inspect_reader+0x250/0x250 [ 2024.947383][ T12] ? _raw_spin_unlock_irqrestore+0x50/0x70 [ 2024.953486][ T12] rcu_tasks_kthread+0x31c/0x6a0 [ 2024.959492][ T12] ? destroy_rcu_head_on_stack+0x10/0x10 [ 2024.965654][ T12] ? finish_wait+0x260/0x260 [ 2024.970779][ T12] ? lockdep_hardirqs_on+0x79/0x100 [ 2024.976419][ T12] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 2024.982793][ T12] ? __kthread_parkme+0x13f/0x1e0 [ 2024.988834][ T12] ? destroy_rcu_head_on_stack+0x10/0x10 [ 2024.995343][ T12] kthread+0x3b1/0x4a0 [ 2024.999500][ T12] ? __kthread_bind_mask+0xc0/0xc0 [ 2025.004693][ T12] ret_from_fork+0x1f/0x30 [ 2025.010622][ T12] Kernel Offset: disabled [ 2025.015505][ T12] Rebooting in 86400 seconds..