[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.11' (ECDSA) to the list of known hosts. syzkaller login: [ 34.336577] IPVS: ftp: loaded support on port[0] = 21 [ 34.406582] chnl_net:caif_netlink_parms(): no params data found [ 34.465263] bridge0: port 1(bridge_slave_0) entered blocking state [ 34.471950] bridge0: port 1(bridge_slave_0) entered disabled state [ 34.480684] device bridge_slave_0 entered promiscuous mode [ 34.489109] bridge0: port 2(bridge_slave_1) entered blocking state [ 34.495467] bridge0: port 2(bridge_slave_1) entered disabled state [ 34.502833] device bridge_slave_1 entered promiscuous mode [ 34.520111] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 34.529547] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 34.547835] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 34.555130] team0: Port device team_slave_0 added [ 34.561542] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 34.569083] team0: Port device team_slave_1 added [ 34.584188] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 34.590920] 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. [ 34.617071] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 34.628791] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 34.635024] 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. [ 34.660642] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 34.671454] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 34.679349] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 34.698672] device hsr_slave_0 entered promiscuous mode [ 34.704337] device hsr_slave_1 entered promiscuous mode [ 34.711446] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 34.718747] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 34.782288] bridge0: port 2(bridge_slave_1) entered blocking state [ 34.788749] bridge0: port 2(bridge_slave_1) entered forwarding state [ 34.795644] bridge0: port 1(bridge_slave_0) entered blocking state [ 34.802020] bridge0: port 1(bridge_slave_0) entered forwarding state [ 34.832439] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 34.839304] 8021q: adding VLAN 0 to HW filter on device bond0 [ 34.848959] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 34.858089] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 34.866933] bridge0: port 1(bridge_slave_0) entered disabled state [ 34.873973] bridge0: port 2(bridge_slave_1) entered disabled state [ 34.881416] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 34.892077] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 34.898543] 8021q: adding VLAN 0 to HW filter on device team0 [ 34.907933] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 34.916901] bridge0: port 1(bridge_slave_0) entered blocking state [ 34.923349] bridge0: port 1(bridge_slave_0) entered forwarding state [ 34.944618] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 34.954851] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 34.968966] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 34.976571] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 34.984136] bridge0: port 2(bridge_slave_1) entered blocking state [ 34.990521] bridge0: port 2(bridge_slave_1) entered forwarding state [ 34.998253] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 35.006897] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 35.014493] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 35.022612] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 35.030632] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 35.037853] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 35.052504] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 35.059802] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 35.066625] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 35.078997] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 35.091370] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 35.100974] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 35.133886] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 35.141794] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 35.149001] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 35.158368] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 35.166922] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 35.173736] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 35.182888] device veth0_vlan entered promiscuous mode [ 35.192095] device veth1_vlan entered promiscuous mode [ 35.198265] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 35.207038] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 35.218475] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 35.227386] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 35.234899] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 35.243884] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 35.252890] device veth0_macvtap entered promiscuous mode [ 35.260216] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 35.269018] device veth1_macvtap entered promiscuous mode [ 35.277900] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 35.287752] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 35.297727] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 35.304386] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 35.314232] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 35.324305] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 35.331135] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program executing program executing program executing program [ 35.425764] hrtimer: interrupt took 35352 ns executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing 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executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 50.583966] ================================================================== [ 50.591532] BUG: KASAN: use-after-free in bcm_can_tx+0x3d4/0x800 [ 50.597659] Read of size 72 at addr ffff888091208868 by task ksoftirqd/0/9 [ 50.604644] [ 50.606255] CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.19.211-syzkaller #0 [ 50.613511] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 [ 50.622847] Call Trace: [ 50.625419] dump_stack+0x1fc/0x2ef [ 50.629032] print_address_description.cold+0x54/0x219 [ 50.634297] kasan_report_error.cold+0x8a/0x1b9 [ 50.638955] ? bcm_can_tx+0x3d4/0x800 [ 50.642759] kasan_report+0x8f/0xa0 [ 50.646399] ? bcm_can_tx+0x3d4/0x800 [ 50.650186] memcpy+0x20/0x50 [ 50.653275] bcm_can_tx+0x3d4/0x800 [ 50.656892] ? canbcm_pernet_init+0x90/0x90 [ 50.661202] ? check_preemption_disabled+0x41/0x280 [ 50.666218] ? check_preemption_disabled+0x41/0x280 [ 50.671243] bcm_tx_timeout_tsklet+0x1f0/0x3a0 [ 50.675809] ? bcm_tx_start_timer+0x1b0/0x1b0 [ 50.680281] ? net_rx_action+0x8d7/0xfb0 [ 50.684327] ? tasklet_action_common.constprop.0+0xa2/0x360 [ 50.690019] tasklet_action_common.constprop.0+0x265/0x360 [ 50.695625] __do_softirq+0x265/0x980 [ 50.699411] ? __local_bh_enable_ip+0x270/0x270 [ 50.704060] run_ksoftirqd+0x57/0x110 [ 50.707843] smpboot_thread_fn+0x655/0x9e0 [ 50.712191] ? __kthread_parkme+0x4c/0x1e0 [ 50.716410] ? sort_range+0x30/0x30 [ 50.720033] ? __kthread_parkme+0x133/0x1e0 [ 50.724347] ? sort_range+0x30/0x30 [ 50.727966] kthread+0x33f/0x460 [ 50.731838] ? kthread_park+0x180/0x180 [ 50.735808] ret_from_fork+0x24/0x30 [ 50.739936] [ 50.741539] Allocated by task 9764: [ 50.745169] __kmalloc+0x15a/0x3c0 [ 50.748687] bcm_sendmsg+0x316c/0x4150 [ 50.752553] sock_sendmsg+0xc3/0x120 [ 50.756245] ___sys_sendmsg+0x7bb/0x8e0 [ 50.760206] __x64_sys_sendmsg+0x132/0x220 [ 50.764418] do_syscall_64+0xf9/0x620 [ 50.768215] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 50.773381] [ 50.775000] Freed by task 9764: [ 50.778273] kfree+0xcc/0x210 [ 50.781365] bcm_remove_op+0x213/0x2c0 [ 50.785239] bcm_release+0x260/0x950 [ 50.788956] __sock_release+0xcd/0x2a0 [ 50.792835] sock_close+0x15/0x20 [ 50.796271] __fput+0x2ce/0x890 [ 50.799532] task_work_run+0x148/0x1c0 [ 50.803399] exit_to_usermode_loop+0x251/0x2a0 [ 50.807973] do_syscall_64+0x538/0x620 [ 50.811853] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 50.817033] [ 50.818642] The buggy address belongs to the object at ffff888091207080 [ 50.818642] which belongs to the cache kmalloc-32768 of size 32768 [ 50.831650] The buggy address is located 6120 bytes inside of [ 50.831650] 32768-byte region [ffff888091207080, ffff88809120f080) [ 50.843770] The buggy address belongs to the page: [ 50.848686] page:ffffea0002448000 count:1 mapcount:0 mapping:ffff88813bff2380 index:0x0 compound_mapcount: 0 [ 50.858814] flags: 0xfff00000008100(slab|head) [ 50.863382] raw: 00fff00000008100 ffffea0002802408 ffffea00024ee008 ffff88813bff2380 [ 50.871260] raw: 0000000000000000 ffff888091207080 0000000100000001 0000000000000000 [ 50.879119] page dumped because: kasan: bad access detected [ 50.884802] [ 50.886405] Memory state around the buggy address: [ 50.891367] ffff888091208700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.899054] ffff888091208780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.906397] >ffff888091208800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.913735] ^ [ 50.920464] ffff888091208880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.927811] ffff888091208900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.935145] ================================================================== [ 50.942491] Disabling lock debugging due to kernel taint [ 50.947977] Kernel panic - not syncing: panic_on_warn set ... [ 50.947977] [ 50.955340] CPU: 0 PID: 9 Comm: ksoftirqd/0 Tainted: G B 4.19.211-syzkaller #0 [ 50.963988] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 [ 50.973335] Call Trace: [ 50.975910] dump_stack+0x1fc/0x2ef [ 50.979522] panic+0x26a/0x50e [ 50.982715] ? __warn_printk+0xf3/0xf3 [ 50.986591] ? trace_hardirqs_on+0x55/0x210 [ 50.990898] kasan_end_report+0x43/0x49 [ 50.994863] kasan_report_error.cold+0xa7/0x1b9 [ 50.999513] ? bcm_can_tx+0x3d4/0x800 [ 51.003295] kasan_report+0x8f/0xa0 [ 51.006902] ? bcm_can_tx+0x3d4/0x800 [ 51.010687] memcpy+0x20/0x50 [ 51.013774] bcm_can_tx+0x3d4/0x800 [ 51.017387] ? canbcm_pernet_init+0x90/0x90 [ 51.021696] ? check_preemption_disabled+0x41/0x280 [ 51.026695] ? check_preemption_disabled+0x41/0x280 [ 51.031695] bcm_tx_timeout_tsklet+0x1f0/0x3a0 [ 51.036258] ? bcm_tx_start_timer+0x1b0/0x1b0 [ 51.040740] ? net_rx_action+0x8d7/0xfb0 [ 51.044789] ? tasklet_action_common.constprop.0+0xa2/0x360 [ 51.050495] tasklet_action_common.constprop.0+0x265/0x360 [ 51.056105] __do_softirq+0x265/0x980 [ 51.059892] ? __local_bh_enable_ip+0x270/0x270 [ 51.064541] run_ksoftirqd+0x57/0x110 [ 51.068324] smpboot_thread_fn+0x655/0x9e0 [ 51.072540] ? __kthread_parkme+0x4c/0x1e0 [ 51.076757] ? sort_range+0x30/0x30 [ 51.080367] ? __kthread_parkme+0x133/0x1e0 [ 51.084668] ? sort_range+0x30/0x30 [ 51.088287] kthread+0x33f/0x460 [ 51.091637] ? kthread_park+0x180/0x180 [ 51.095611] ret_from_fork+0x24/0x30 [ 51.099483] Kernel Offset: disabled [ 51.103121] Rebooting in 86400 seconds..