[ 72.804030][ T27] audit: type=1800 audit(1584090769.766:26): pid=9705 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 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. [ 73.674366][ T27] kauditd_printk_skb: 2 callbacks suppressed [ 73.674376][ T27] audit: type=1800 audit(1584090770.646:29): pid=9705 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 73.718496][ T27] audit: type=1800 audit(1584090770.656:30): pid=9705 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.213' (ECDSA) to the list of known hosts. 2020/03/13 09:13:29 parsed 1 programs 2020/03/13 09:13:31 executed programs: 0 syzkaller login: [ 114.581469][ T9874] IPVS: ftp: loaded support on port[0] = 21 [ 114.648961][ T9874] chnl_net:caif_netlink_parms(): no params data found [ 114.693072][ T9874] bridge0: port 1(bridge_slave_0) entered blocking state [ 114.700959][ T9874] bridge0: port 1(bridge_slave_0) entered disabled state [ 114.709114][ T9874] device bridge_slave_0 entered promiscuous mode [ 114.718405][ T9874] bridge0: port 2(bridge_slave_1) entered blocking state [ 114.725793][ T9874] bridge0: port 2(bridge_slave_1) entered disabled state [ 114.733570][ T9874] device bridge_slave_1 entered promiscuous mode [ 114.753007][ T9874] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 114.764105][ T9874] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 114.786513][ T9874] team0: Port device team_slave_0 added [ 114.794260][ T9874] team0: Port device team_slave_1 added [ 114.811422][ T9874] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 114.818650][ T9874] 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. [ 114.845341][ T9874] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 114.858005][ T9874] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 114.865255][ T9874] 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. [ 114.891901][ T9874] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 114.968175][ T9874] device hsr_slave_0 entered promiscuous mode [ 115.005437][ T9874] device hsr_slave_1 entered promiscuous mode [ 115.129758][ T9874] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 115.198694][ T9874] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 115.258420][ T9874] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 115.318302][ T9874] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 115.393657][ T9874] bridge0: port 2(bridge_slave_1) entered blocking state [ 115.401081][ T9874] bridge0: port 2(bridge_slave_1) entered forwarding state [ 115.410210][ T9874] bridge0: port 1(bridge_slave_0) entered blocking state [ 115.417492][ T9874] bridge0: port 1(bridge_slave_0) entered forwarding state [ 115.466490][ T9874] 8021q: adding VLAN 0 to HW filter on device bond0 [ 115.481457][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 115.492707][ T22] bridge0: port 1(bridge_slave_0) entered disabled state [ 115.500960][ T22] bridge0: port 2(bridge_slave_1) entered disabled state [ 115.509519][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 115.524036][ T9874] 8021q: adding VLAN 0 to HW filter on device team0 [ 115.536822][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 115.546757][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 115.553840][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 115.576557][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 115.586279][ T22] bridge0: port 2(bridge_slave_1) entered blocking state [ 115.593344][ T22] bridge0: port 2(bridge_slave_1) entered forwarding state [ 115.602475][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 115.612081][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 115.624551][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 115.642588][ T9874] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 115.656559][ T9874] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 115.669838][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 115.679436][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 115.688404][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 115.709448][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 115.717816][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 115.732655][ T9874] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 115.758666][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 115.768833][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 115.792354][ T9874] device veth0_vlan entered promiscuous mode [ 115.799671][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 115.808857][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 115.822499][ T9874] device veth1_vlan entered promiscuous mode [ 115.831006][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 115.839898][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 115.849000][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 115.875418][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 115.883567][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 115.892523][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 115.904455][ T9874] device veth0_macvtap entered promiscuous mode [ 115.917326][ T9874] device veth1_macvtap entered promiscuous mode [ 115.936348][ T9874] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 115.944179][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 115.953142][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 115.961280][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 115.970230][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 115.981941][ T9874] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 115.989744][ T3201] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 115.998704][ T3201] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready 2020/03/13 09:13:36 executed programs: 28 [ 120.068611][T10076] ================================================================== [ 120.076854][T10076] BUG: KASAN: use-after-free in __list_add_valid+0x93/0xa0 [ 120.084199][T10076] Read of size 8 at addr ffff8880a62001e0 by task syz-executor.0/10076 [ 120.092423][T10076] [ 120.094740][T10076] CPU: 0 PID: 10076 Comm: syz-executor.0 Not tainted 5.6.0-rc3-next-20200228-syzkaller #0 [ 120.104679][T10076] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 120.114726][T10076] Call Trace: [ 120.119041][T10076] dump_stack+0x188/0x20d [ 120.123581][T10076] ? __list_add_valid+0x93/0xa0 [ 120.128613][T10076] ? __list_add_valid+0x93/0xa0 [ 120.133649][T10076] print_address_description.constprop.0.cold+0xd3/0x315 [ 120.141521][T10076] ? __list_add_valid+0x93/0xa0 [ 120.146401][T10076] ? __list_add_valid+0x93/0xa0 [ 120.151328][T10076] __kasan_report.cold+0x1a/0x32 [ 120.156361][T10076] ? __list_add_valid+0x93/0xa0 [ 120.161366][T10076] kasan_report+0xe/0x20 [ 120.165646][T10076] __list_add_valid+0x93/0xa0 [ 120.170339][T10076] rdma_listen+0x681/0x910 [ 120.174756][T10076] ucma_listen+0x14d/0x1c0 [ 120.179458][T10076] ? ucma_notify+0x190/0x190 [ 120.184190][T10076] ? __might_fault+0x190/0x1d0 [ 120.188949][T10076] ? _copy_from_user+0x123/0x190 [ 120.193932][T10076] ? ucma_notify+0x190/0x190 [ 120.198525][T10076] ucma_write+0x285/0x350 [ 120.202848][T10076] ? ucma_open+0x270/0x270 [ 120.207274][T10076] ? security_file_permission+0x8a/0x370 [ 120.212912][T10076] ? ucma_open+0x270/0x270 [ 120.217320][T10076] __vfs_write+0x76/0x100 [ 120.221643][T10076] vfs_write+0x262/0x5c0 [ 120.225880][T10076] ksys_write+0x1e8/0x250 [ 120.231066][T10076] ? __ia32_sys_read+0xb0/0xb0 [ 120.235828][T10076] ? __ia32_sys_clock_settime+0x260/0x260 [ 120.241545][T10076] ? trace_hardirqs_off_caller+0x55/0x230 [ 120.247256][T10076] do_syscall_64+0xf6/0x790 [ 120.251765][T10076] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 120.257647][T10076] RIP: 0033:0x45c679 [ 120.261530][T10076] Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 120.283117][T10076] RSP: 002b:00007f08f3ecbc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 120.291526][T10076] RAX: ffffffffffffffda RBX: 00007f08f3ecc6d4 RCX: 000000000045c679 [ 120.299487][T10076] RDX: 0000000000000010 RSI: 0000000020000140 RDI: 0000000000000003 [ 120.307452][T10076] RBP: 000000000076bfa0 R08: 0000000000000000 R09: 0000000000000000 [ 120.315421][T10076] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 120.323379][T10076] R13: 0000000000000cbe R14: 00000000004cec51 R15: 000000000076bfac [ 120.331354][T10076] [ 120.333668][T10076] Allocated by task 9950: [ 120.338004][T10076] save_stack+0x1b/0x40 [ 120.342152][T10076] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 120.347787][T10076] kmem_cache_alloc_trace+0x153/0x7d0 [ 120.353148][T10076] __rdma_create_id+0x5b/0x850 [ 120.357899][T10076] ucma_create_id+0x1cb/0x580 [ 120.362565][T10076] ucma_write+0x285/0x350 [ 120.366884][T10076] __vfs_write+0x76/0x100 [ 120.371196][T10076] vfs_write+0x262/0x5c0 [ 120.375439][T10076] ksys_write+0x1e8/0x250 [ 120.379770][T10076] do_syscall_64+0xf6/0x790 [ 120.384257][T10076] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 120.390125][T10076] [ 120.392450][T10076] Freed by task 9946: [ 120.396436][T10076] save_stack+0x1b/0x40 [ 120.400576][T10076] __kasan_slab_free+0xf7/0x140 [ 120.405411][T10076] kfree+0x109/0x2b0 [ 120.409285][T10076] ucma_close+0x10b/0x300 [ 120.413591][T10076] __fput+0x2da/0x850 [ 120.417557][T10076] task_work_run+0x13f/0x1b0 [ 120.422130][T10076] exit_to_usermode_loop+0x2fa/0x360 [ 120.427469][T10076] do_syscall_64+0x672/0x790 [ 120.432387][T10076] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 120.438270][T10076] [ 120.440597][T10076] The buggy address belongs to the object at ffff8880a6200000 [ 120.440597][T10076] which belongs to the cache kmalloc-2k of size 2048 [ 120.454648][T10076] The buggy address is located 480 bytes inside of [ 120.454648][T10076] 2048-byte region [ffff8880a6200000, ffff8880a6200800) [ 120.468001][T10076] The buggy address belongs to the page: [ 120.473630][T10076] page:ffffea0002988000 refcount:1 mapcount:0 mapping:00000000d14a6b70 index:0x0 [ 120.482741][T10076] flags: 0xfffe0000000200(slab) [ 120.487623][T10076] raw: 00fffe0000000200 ffffea00029cf908 ffffea00029b9748 ffff8880aa000e00 [ 120.496199][T10076] raw: 0000000000000000 ffff8880a6200000 0000000100000001 0000000000000000 [ 120.504773][T10076] page dumped because: kasan: bad access detected [ 120.511320][T10076] [ 120.513630][T10076] Memory state around the buggy address: [ 120.519339][T10076] ffff8880a6200080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 120.527382][T10076] ffff8880a6200100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 120.535441][T10076] >ffff8880a6200180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 120.543497][T10076] ^ [ 120.550866][T10076] ffff8880a6200200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 120.558911][T10076] ffff8880a6200280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 120.566954][T10076] ================================================================== [ 120.575344][T10076] Disabling lock debugging due to kernel taint [ 120.582934][T10076] Kernel panic - not syncing: panic_on_warn set ... [ 120.589687][T10076] CPU: 1 PID: 10076 Comm: syz-executor.0 Tainted: G B 5.6.0-rc3-next-20200228-syzkaller #0 [ 120.601121][T10076] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 120.611160][T10076] Call Trace: [ 120.614442][T10076] dump_stack+0x188/0x20d [ 120.618941][T10076] panic+0x2e3/0x75c [ 120.622815][T10076] ? add_taint.cold+0x16/0x16 [ 120.627474][T10076] ? preempt_schedule_common+0x5e/0xc0 [ 120.632925][T10076] ? __list_add_valid+0x93/0xa0 [ 120.637774][T10076] ? ___preempt_schedule+0x16/0x18 [ 120.642862][T10076] ? trace_hardirqs_on+0x55/0x220 [ 120.647869][T10076] ? __list_add_valid+0x93/0xa0 [ 120.652702][T10076] end_report+0x43/0x49 [ 120.656833][T10076] ? __list_add_valid+0x93/0xa0 [ 120.661683][T10076] __kasan_report.cold+0xd/0x32 [ 120.666518][T10076] ? __list_add_valid+0x93/0xa0 [ 120.671419][T10076] kasan_report+0xe/0x20 [ 120.675647][T10076] __list_add_valid+0x93/0xa0 [ 120.680313][T10076] rdma_listen+0x681/0x910 [ 120.684875][T10076] ucma_listen+0x14d/0x1c0 [ 120.689293][T10076] ? ucma_notify+0x190/0x190 [ 120.693869][T10076] ? __might_fault+0x190/0x1d0 [ 120.698784][T10076] ? _copy_from_user+0x123/0x190 [ 120.703702][T10076] ? ucma_notify+0x190/0x190 [ 120.708268][T10076] ucma_write+0x285/0x350 [ 120.712574][T10076] ? ucma_open+0x270/0x270 [ 120.716973][T10076] ? security_file_permission+0x8a/0x370 [ 120.726249][T10076] ? ucma_open+0x270/0x270 [ 120.730863][T10076] __vfs_write+0x76/0x100 [ 120.735194][T10076] vfs_write+0x262/0x5c0 [ 120.739430][T10076] ksys_write+0x1e8/0x250 [ 120.743743][T10076] ? __ia32_sys_read+0xb0/0xb0 [ 120.748489][T10076] ? __ia32_sys_clock_settime+0x260/0x260 [ 120.754274][T10076] ? trace_hardirqs_off_caller+0x55/0x230 [ 120.759977][T10076] do_syscall_64+0xf6/0x790 [ 120.764465][T10076] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 120.770334][T10076] RIP: 0033:0x45c679 [ 120.774204][T10076] Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 120.793965][T10076] RSP: 002b:00007f08f3ecbc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 120.802406][T10076] RAX: ffffffffffffffda RBX: 00007f08f3ecc6d4 RCX: 000000000045c679 [ 120.810496][T10076] RDX: 0000000000000010 RSI: 0000000020000140 RDI: 0000000000000003 [ 120.818480][T10076] RBP: 000000000076bfa0 R08: 0000000000000000 R09: 0000000000000000 [ 120.826462][T10076] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 120.834418][T10076] R13: 0000000000000cbe R14: 00000000004cec51 R15: 000000000076bfac [ 120.843881][T10076] Kernel Offset: disabled [ 120.848300][T10076] Rebooting in 86400 seconds..