[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 77.045643][ T26] audit: type=1800 audit(1585064321.301:25): pid=9314 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 77.076868][ T26] audit: type=1800 audit(1585064321.301:26): pid=9314 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 77.116085][ T26] audit: type=1800 audit(1585064321.311:27): pid=9314 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 '10.128.1.2' (ECDSA) to the list of known hosts. syzkaller login: [ 88.211433][ T9468] IPVS: ftp: loaded support on port[0] = 21 [ 88.266527][ T9468] chnl_net:caif_netlink_parms(): no params data found [ 88.307797][ T9468] bridge0: port 1(bridge_slave_0) entered blocking state [ 88.315483][ T9468] bridge0: port 1(bridge_slave_0) entered disabled state [ 88.323783][ T9468] device bridge_slave_0 entered promiscuous mode [ 88.332720][ T9468] bridge0: port 2(bridge_slave_1) entered blocking state [ 88.339816][ T9468] bridge0: port 2(bridge_slave_1) entered disabled state [ 88.347738][ T9468] device bridge_slave_1 entered promiscuous mode [ 88.365877][ T9468] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 88.376697][ T9468] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 88.398093][ T9468] team0: Port device team_slave_0 added [ 88.405370][ T9468] team0: Port device team_slave_1 added [ 88.421177][ T9468] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 88.428156][ T9468] 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. [ 88.454287][ T9468] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 88.467004][ T9468] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 88.474184][ T9468] 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. [ 88.500213][ T9468] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 88.563046][ T9468] device hsr_slave_0 entered promiscuous mode [ 88.630758][ T9468] device hsr_slave_1 entered promiscuous mode [ 88.779062][ T9468] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 88.833941][ T9468] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 88.893488][ T9468] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 88.963798][ T9468] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 89.055402][ T9468] bridge0: port 2(bridge_slave_1) entered blocking state [ 89.062729][ T9468] bridge0: port 2(bridge_slave_1) entered forwarding state [ 89.070554][ T9468] bridge0: port 1(bridge_slave_0) entered blocking state [ 89.077620][ T9468] bridge0: port 1(bridge_slave_0) entered forwarding state [ 89.123510][ T9468] 8021q: adding VLAN 0 to HW filter on device bond0 [ 89.136634][ T3233] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 89.146801][ T3233] bridge0: port 1(bridge_slave_0) entered disabled state [ 89.155038][ T3233] bridge0: port 2(bridge_slave_1) entered disabled state [ 89.163614][ T3233] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 89.177833][ T9468] 8021q: adding VLAN 0 to HW filter on device team0 [ 89.189031][ T2876] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 89.198457][ T2876] bridge0: port 1(bridge_slave_0) entered blocking state [ 89.205585][ T2876] bridge0: port 1(bridge_slave_0) entered forwarding state [ 89.218051][ T3233] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 89.227214][ T3233] bridge0: port 2(bridge_slave_1) entered blocking state [ 89.234316][ T3233] bridge0: port 2(bridge_slave_1) entered forwarding state [ 89.252442][ T2876] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 89.261907][ T2876] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 89.272835][ T3233] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 89.282931][ T3233] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 89.297995][ T9468] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 89.310013][ T9468] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 89.322520][ T2876] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 89.332334][ T2876] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 89.341452][ T2876] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 89.349953][ T2876] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 89.359651][ T2876] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 89.381229][ T9468] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 89.390112][ T2962] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 89.398333][ T2962] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 89.422898][ T3233] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 89.432238][ T3233] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 89.445416][ T9468] device veth0_vlan entered promiscuous mode [ 89.452462][ T2962] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 89.461944][ T2962] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 89.472086][ T2962] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 89.479748][ T2962] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 89.492585][ T9468] device veth1_vlan entered promiscuous mode [ 89.514366][ T2876] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 89.522901][ T2876] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 89.531357][ T2876] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 89.539739][ T2876] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 89.550124][ T9468] device veth0_macvtap entered promiscuous mode [ 89.562522][ T9468] device veth1_macvtap entered promiscuous mode [ 89.577908][ T9468] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 89.587134][ T2876] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 89.595239][ T2876] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 89.603182][ T2876] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 89.611853][ T2876] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 89.623939][ T9468] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 89.632159][ T3233] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 89.641650][ T3233] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 94.630184][ T9558] ================================================================== [ 94.638373][ T9558] BUG: KASAN: slab-out-of-bounds in resample_shrink+0x5eb/0x6f0 [ 94.646006][ T9558] Read of size 2 at addr ffff888092bef200 by task syz-executor994/9558 [ 94.654217][ T9558] [ 94.656533][ T9558] CPU: 0 PID: 9558 Comm: syz-executor994 Not tainted 5.6.0-rc3-next-20200228-syzkaller #0 [ 94.666401][ T9558] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 94.676440][ T9558] Call Trace: [ 94.679721][ T9558] dump_stack+0x188/0x20d [ 94.684046][ T9558] ? resample_shrink+0x5eb/0x6f0 [ 94.688977][ T9558] ? resample_shrink+0x5eb/0x6f0 [ 94.693899][ T9558] print_address_description.constprop.0.cold+0xd3/0x315 [ 94.700914][ T9558] ? resample_shrink+0x5eb/0x6f0 [ 94.705855][ T9558] ? resample_shrink+0x5eb/0x6f0 [ 94.710774][ T9558] __kasan_report.cold+0x1a/0x32 [ 94.715799][ T9558] ? resample_shrink+0x5eb/0x6f0 [ 94.720734][ T9558] kasan_report+0xe/0x20 [ 94.724968][ T9558] resample_shrink+0x5eb/0x6f0 [ 94.729723][ T9558] rate_transfer+0x21a/0x2c0 [ 94.734301][ T9558] snd_pcm_plug_read_transfer+0x180/0x2a0 [ 94.739999][ T9558] ? snd_pcm_plug_write_transfer+0x3a0/0x3a0 [ 94.745971][ T9558] ? snd_pcm_format_physical_width+0x71/0x90 [ 94.751946][ T9558] ? snd_pcm_plug_client_channels_buf+0x20b/0x440 [ 94.758342][ T9558] snd_pcm_oss_read2+0x1d0/0x3e0 [ 94.763266][ T9558] ? snd_pcm_oss_read3+0x400/0x400 [ 94.768382][ T9558] snd_pcm_oss_read+0x52b/0x6f0 [ 94.773266][ T9558] ? rw_verify_area+0x11d/0x340 [ 94.778118][ T9558] do_iter_read+0x47f/0x650 [ 94.782626][ T9558] vfs_readv+0xf0/0x160 [ 94.786827][ T9558] ? compat_rw_copy_check_uvector+0x4b0/0x4b0 [ 94.792922][ T9558] ? rcu_read_lock_held_common+0x130/0x130 [ 94.798723][ T9558] ? do_dup2+0x520/0x520 [ 94.803224][ T9558] ? __fget_light+0x208/0x270 [ 94.807939][ T9558] do_readv+0x133/0x2f0 [ 94.812077][ T9558] ? vfs_readv+0x160/0x160 [ 94.816485][ T9558] ? trace_hardirqs_off_caller+0x55/0x230 [ 94.822200][ T9558] do_syscall_64+0xf6/0x790 [ 94.826707][ T9558] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 94.832627][ T9558] RIP: 0033:0x44a4e9 [ 94.836508][ T9558] Code: e8 ac 15 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 5b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 94.856102][ T9558] RSP: 002b:00007f998a10dce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 [ 94.864565][ T9558] RAX: ffffffffffffffda RBX: 00000000006e69e8 RCX: 000000000044a4e9 [ 94.872588][ T9558] RDX: 0000000000000001 RSI: 0000000020395000 RDI: 0000000000000003 [ 94.880557][ T9558] RBP: 00000000006e69e0 R08: 0000000000000000 R09: 0000000000000000 [ 94.888570][ T9558] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006e69ec [ 94.896531][ T9558] R13: 00007ffdfe6153cf R14: 00007f998a10e9c0 R15: 20c49ba5e353f7cf [ 94.904543][ T9558] [ 94.906853][ T9558] Allocated by task 9558: [ 94.911221][ T9558] save_stack+0x1b/0x40 [ 94.915370][ T9558] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 94.920989][ T9558] kvmalloc_node+0x61/0xf0 [ 94.925398][ T9558] snd_pcm_plugin_alloc+0x56c/0x770 [ 94.930585][ T9558] snd_pcm_plug_alloc+0x145/0x330 [ 94.935592][ T9558] snd_pcm_oss_change_params_locked+0x1c05/0x34b0 [ 94.941990][ T9558] snd_pcm_oss_change_params+0x76/0xd0 [ 94.947471][ T9558] snd_pcm_oss_get_active_substream+0x129/0x180 [ 94.953713][ T9558] snd_pcm_oss_ioctl+0xebe/0x31c0 [ 94.959065][ T9558] ksys_ioctl+0x11a/0x180 [ 94.963376][ T9558] __x64_sys_ioctl+0x6f/0xb0 [ 94.967970][ T9558] do_syscall_64+0xf6/0x790 [ 94.972456][ T9558] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 94.978337][ T9558] [ 94.980648][ T9558] Freed by task 0: [ 94.984404][ T9558] (stack is not available) [ 94.988802][ T9558] [ 94.991113][ T9558] The buggy address belongs to the object at ffff888092bef000 [ 94.991113][ T9558] which belongs to the cache kmalloc-512 of size 512 [ 95.005147][ T9558] The buggy address is located 0 bytes to the right of [ 95.005147][ T9558] 512-byte region [ffff888092bef000, ffff888092bef200) [ 95.018792][ T9558] The buggy address belongs to the page: [ 95.024433][ T9558] page:ffffea00024afbc0 refcount:1 mapcount:0 mapping:000000002b175393 index:0x0 [ 95.033524][ T9558] flags: 0xfffe0000000200(slab) [ 95.038358][ T9558] raw: 00fffe0000000200 ffffea0002a4f148 ffffea0002619b48 ffff8880aa000a80 [ 95.046925][ T9558] raw: 0000000000000000 ffff888092bef000 0000000100000004 0000000000000000 [ 95.055502][ T9558] page dumped because: kasan: bad access detected [ 95.061915][ T9558] [ 95.064234][ T9558] Memory state around the buggy address: [ 95.069854][ T9558] ffff888092bef100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 95.077908][ T9558] ffff888092bef180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 95.085969][ T9558] >ffff888092bef200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 95.094105][ T9558] ^ [ 95.099504][ T9558] ffff888092bef280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 95.107553][ T9558] ffff888092bef300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 95.115613][ T9558] ================================================================== [ 95.123812][ T9558] Disabling lock debugging due to kernel taint [ 95.131958][ T9558] Kernel panic - not syncing: panic_on_warn set ... [ 95.138564][ T9558] CPU: 1 PID: 9558 Comm: syz-executor994 Tainted: G B 5.6.0-rc3-next-20200228-syzkaller #0 [ 95.149822][ T9558] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 95.159879][ T9558] Call Trace: [ 95.163155][ T9558] dump_stack+0x188/0x20d [ 95.167466][ T9558] panic+0x2e3/0x75c [ 95.171349][ T9558] ? add_taint.cold+0x16/0x16 [ 95.176029][ T9558] ? preempt_schedule_common+0x5e/0xc0 [ 95.181502][ T9558] ? resample_shrink+0x5eb/0x6f0 [ 95.186432][ T9558] ? ___preempt_schedule+0x16/0x18 [ 95.191524][ T9558] ? trace_hardirqs_on+0x55/0x220 [ 95.196572][ T9558] ? resample_shrink+0x5eb/0x6f0 [ 95.201535][ T9558] end_report+0x43/0x49 [ 95.205687][ T9558] ? resample_shrink+0x5eb/0x6f0 [ 95.210603][ T9558] __kasan_report.cold+0xd/0x32 [ 95.215432][ T9558] ? resample_shrink+0x5eb/0x6f0 [ 95.220347][ T9558] kasan_report+0xe/0x20 [ 95.224570][ T9558] resample_shrink+0x5eb/0x6f0 [ 95.229318][ T9558] rate_transfer+0x21a/0x2c0 [ 95.233887][ T9558] snd_pcm_plug_read_transfer+0x180/0x2a0 [ 95.239581][ T9558] ? snd_pcm_plug_write_transfer+0x3a0/0x3a0 [ 95.245553][ T9558] ? snd_pcm_format_physical_width+0x71/0x90 [ 95.251511][ T9558] ? snd_pcm_plug_client_channels_buf+0x20b/0x440 [ 95.257921][ T9558] snd_pcm_oss_read2+0x1d0/0x3e0 [ 95.262838][ T9558] ? snd_pcm_oss_read3+0x400/0x400 [ 95.267929][ T9558] snd_pcm_oss_read+0x52b/0x6f0 [ 95.272758][ T9558] ? rw_verify_area+0x11d/0x340 [ 95.277584][ T9558] do_iter_read+0x47f/0x650 [ 95.282077][ T9558] vfs_readv+0xf0/0x160 [ 95.286215][ T9558] ? compat_rw_copy_check_uvector+0x4b0/0x4b0 [ 95.292389][ T9558] ? rcu_read_lock_held_common+0x130/0x130 [ 95.298233][ T9558] ? do_dup2+0x520/0x520 [ 95.302506][ T9558] ? __fget_light+0x208/0x270 [ 95.307173][ T9558] do_readv+0x133/0x2f0 [ 95.311310][ T9558] ? vfs_readv+0x160/0x160 [ 95.315705][ T9558] ? trace_hardirqs_off_caller+0x55/0x230 [ 95.321404][ T9558] do_syscall_64+0xf6/0x790 [ 95.325937][ T9558] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 95.331806][ T9558] RIP: 0033:0x44a4e9 [ 95.335683][ T9558] Code: e8 ac 15 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 5b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 95.355273][ T9558] RSP: 002b:00007f998a10dce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 [ 95.363826][ T9558] RAX: ffffffffffffffda RBX: 00000000006e69e8 RCX: 000000000044a4e9 [ 95.371830][ T9558] RDX: 0000000000000001 RSI: 0000000020395000 RDI: 0000000000000003 [ 95.379779][ T9558] RBP: 00000000006e69e0 R08: 0000000000000000 R09: 0000000000000000 [ 95.387728][ T9558] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006e69ec [ 95.395677][ T9558] R13: 00007ffdfe6153cf R14: 00007f998a10e9c0 R15: 20c49ba5e353f7cf [ 95.405051][ T9558] Kernel Offset: disabled [ 95.409382][ T9558] Rebooting in 86400 seconds..