[ OK ] Started OpenBSD Secure Shell server. [ 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 Warning: Permanently added '10.128.10.29' (ECDSA) to the list of known hosts. 2020/07/20 04:01:32 fuzzer started 2020/07/20 04:01:32 dialing manager at 10.128.0.26:33695 2020/07/20 04:01:33 syscalls: 3087 2020/07/20 04:01:33 code coverage: enabled 2020/07/20 04:01:33 comparison tracing: CONFIG_KCOV_ENABLE_COMPARISONS is not enabled 2020/07/20 04:01:33 extra coverage: enabled 2020/07/20 04:01:33 setuid sandbox: enabled 2020/07/20 04:01:33 namespace sandbox: enabled 2020/07/20 04:01:33 Android sandbox: enabled 2020/07/20 04:01:33 fault injection: enabled 2020/07/20 04:01:33 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/07/20 04:01:33 net packet injection: enabled 2020/07/20 04:01:33 net device setup: enabled 2020/07/20 04:01:33 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2020/07/20 04:01:33 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/07/20 04:01:33 USB emulation: /dev/raw-gadget does not exist 04:04:11 executing program 0: clone(0x20002004ffc, 0x0, 0xfffffffffffffffe, 0x0, 0xffffffffffffffff) exit_group(0x0) perf_event_open(&(0x7f00000000c0)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1ff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_config_ext}, 0x0, 0x0, 0xffffffffffffffff, 0x0) keyctl$instantiate(0xc, 0x0, &(0x7f0000000100)=@encrypted_new={'new ', 'default', 0x20, 'user:', 'syz', 0x20, 0x1000}, 0x2a, 0x0) add_key(&(0x7f0000000140)='encrypted\x00', &(0x7f0000000180)={'syz'}, &(0x7f0000000100), 0xca, 0xfffffffffffffffe) syzkaller login: [ 284.047495][ T33] audit: type=1400 audit(1595217851.704:8): avc: denied { execmem } for pid=8480 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 284.392664][ T8481] IPVS: ftp: loaded support on port[0] = 21 [ 284.673579][ T8481] chnl_net:caif_netlink_parms(): no params data found [ 284.911482][ T8481] bridge0: port 1(bridge_slave_0) entered blocking state [ 284.918704][ T8481] bridge0: port 1(bridge_slave_0) entered disabled state [ 284.928552][ T8481] device bridge_slave_0 entered promiscuous mode [ 284.961453][ T8481] bridge0: port 2(bridge_slave_1) entered blocking state [ 284.968670][ T8481] bridge0: port 2(bridge_slave_1) entered disabled state [ 284.978372][ T8481] device bridge_slave_1 entered promiscuous mode [ 285.051670][ T8481] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 285.067091][ T8481] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 285.132661][ T8481] team0: Port device team_slave_0 added [ 285.150284][ T8481] team0: Port device team_slave_1 added [ 285.200831][ T8481] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 285.207876][ T8481] 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. [ 285.234088][ T8481] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 285.271699][ T8481] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 285.278731][ T8481] 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. [ 285.304917][ T8481] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 285.407439][ T8481] device hsr_slave_0 entered promiscuous mode [ 285.570920][ T8481] device hsr_slave_1 entered promiscuous mode [ 286.002096][ T8481] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 286.084843][ T8481] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 286.147227][ T8481] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 286.187287][ T8481] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 286.454897][ T8481] 8021q: adding VLAN 0 to HW filter on device bond0 [ 286.498292][ T2316] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 286.506716][ T2316] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 286.534137][ T8481] 8021q: adding VLAN 0 to HW filter on device team0 [ 286.548829][ T3093] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 286.558527][ T3093] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 286.567760][ T3093] bridge0: port 1(bridge_slave_0) entered blocking state [ 286.575092][ T3093] bridge0: port 1(bridge_slave_0) entered forwarding state [ 286.660018][ T3093] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 286.669043][ T3093] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 286.678670][ T3093] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 286.688453][ T3093] bridge0: port 2(bridge_slave_1) entered blocking state [ 286.695740][ T3093] bridge0: port 2(bridge_slave_1) entered forwarding state [ 286.704714][ T3093] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 286.715462][ T3093] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 286.726206][ T3093] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 286.736381][ T3093] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 286.746548][ T3093] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 286.756794][ T3093] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 286.766985][ T3093] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 286.776540][ T3093] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 286.791946][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 286.801881][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 286.811350][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 286.827136][ T8481] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 286.902723][ T2316] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 286.910805][ T2316] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 286.932183][ T8481] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 286.972198][ T2316] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 286.982185][ T2316] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 287.030187][ T2316] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 287.040818][ T2316] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 287.055110][ T8481] device veth0_vlan entered promiscuous mode [ 287.063101][ T2316] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 287.072317][ T2316] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 287.094587][ T8481] device veth1_vlan entered promiscuous mode [ 287.148359][ T2316] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 287.157653][ T2316] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 287.167941][ T2316] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 287.177647][ T2316] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 287.194934][ T8481] device veth0_macvtap entered promiscuous mode [ 287.210611][ T8481] device veth1_macvtap entered promiscuous mode [ 287.247619][ T8481] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 287.255774][ T2316] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 287.265014][ T2316] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 287.274141][ T2316] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 287.283906][ T2316] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 287.306942][ T8481] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 287.330124][ T2316] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 287.339872][ T2316] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 287.829454][ C0] hrtimer: interrupt took 45246 ns 04:04:15 executing program 0: r0 = openat$tun(0xffffffffffffff9c, &(0x7f0000000100)='/dev/net/tun\x00', 0x0, 0x0) ioctl$TUNSETIFF(r0, 0x400454ca, &(0x7f00000000c0)={'syzkaller1\x00', 0x102}) ioctl$TUNSETQUEUE(r0, 0x400454d9, &(0x7f0000000000)={'ip6erspan0\x00', 0x400}) ioctl$TUNATTACHFILTER(r0, 0x401054d5, &(0x7f00000001c0)={0x1, &(0x7f0000000040)=[{}]}) r1 = openat$tun(0xffffffffffffff9c, &(0x7f0000000100)='/dev/net/tun\x00', 0x0, 0x0) socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000180)={0xffffffffffffffff, 0xffffffffffffffff}) r3 = dup(r2) ioctl$PERF_EVENT_IOC_ENABLE(r3, 0x8912, 0x400200) ioctl$TUNSETQUEUE(r0, 0x400454d9, &(0x7f0000000280)={'veth1_to_hsr\x00', 0x600}) ioctl$TUNSETIFF(r1, 0x400454ca, &(0x7f00000000c0)={'syzkaller1\x00', 0x102}) 04:04:16 executing program 0: r0 = open(&(0x7f0000000000)='./bus\x00', 0x16b342, 0x0) r1 = openat$procfs(0xffffffffffffff9c, &(0x7f0000000040)='/proc/bus/input/devices\x00', 0x0, 0x0) sendfile(r0, r1, 0x0, 0x4000000000010046) [ 288.516610][ T8733] ===================================================== [ 288.523583][ T8733] BUG: KMSAN: uninit-value in kmsan_handle_dma+0x9f/0xb0 [ 288.530607][ T8733] CPU: 1 PID: 8733 Comm: syz-executor.0 Not tainted 5.8.0-rc5-syzkaller #0 [ 288.539181][ T8733] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 288.549227][ T8733] Call Trace: [ 288.552521][ T8733] dump_stack+0x1df/0x240 [ 288.556867][ T8733] kmsan_report+0xf7/0x1e0 [ 288.561293][ T8733] kmsan_internal_check_memory+0x238/0x3d0 [ 288.567117][ T8733] kmsan_handle_dma+0x9f/0xb0 [ 288.571798][ T8733] virtqueue_add+0x46db/0x70f0 [ 288.576730][ T8733] ? kmsan_task_context_state+0x47/0x90 [ 288.582286][ T8733] ? kmsan_task_context_state+0x47/0x90 [ 288.587845][ T8733] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 288.593677][ T8733] virtqueue_add_sgs+0x319/0x330 [ 288.598632][ T8733] virtscsi_add_cmd+0x888/0xb20 [ 288.603505][ T8733] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 288.609310][ T8733] virtscsi_queuecommand+0xe72/0x1080 [ 288.614687][ T8733] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 288.620496][ T8733] ? kmsan_get_metadata+0x11d/0x180 [ 288.625696][ T8733] ? virtscsi_init+0x1220/0x1220 [ 288.630632][ T8733] scsi_queue_rq+0x3eb7/0x4b00 [ 288.635411][ T8733] ? scsi_vpd_tpg_id+0x3e0/0x3e0 [ 288.640350][ T8733] blk_mq_dispatch_rq_list+0x931/0x3430 [ 288.645899][ T8733] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 288.651711][ T8733] ? kmsan_get_metadata+0x11d/0x180 [ 288.656914][ T8733] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 288.662723][ T8733] ? __msan_metadata_ptr_for_load_4+0x20/0x20 [ 288.668800][ T8733] blk_mq_do_dispatch_sched+0x609/0x880 [ 288.674368][ T8733] __blk_mq_sched_dispatch_requests+0x60e/0x8f0 [ 288.680614][ T8733] ? __msan_metadata_ptr_for_store_8+0x13/0x20 [ 288.686766][ T8733] ? rb_insert_color+0xbbe/0x1180 [ 288.691806][ T8733] ? kmsan_get_metadata+0x11d/0x180 [ 288.697013][ T8733] blk_mq_sched_dispatch_requests+0x15d/0x2d0 [ 288.703083][ T8733] __blk_mq_run_hw_queue+0x171/0x3a0 [ 288.708368][ T8733] __blk_mq_delay_run_hw_queue+0x15d/0x6a0 [ 288.714183][ T8733] ? kmsan_get_metadata+0x11d/0x180 [ 288.719389][ T8733] blk_mq_run_hw_queue+0x4ac/0x670 [ 288.724520][ T8733] blk_mq_sched_insert_requests+0x496/0x640 [ 288.730435][ T8733] blk_mq_flush_plug_list+0xb21/0xca0 [ 288.735821][ T8733] blk_flush_plug_list+0x72f/0x7b0 [ 288.740931][ T8733] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 288.747015][ T8733] blk_finish_plug+0xa0/0xd0 [ 288.751624][ T8733] ext4_writepages+0x59d0/0x64c0 [ 288.756924][ T8733] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 288.762992][ T8733] ? __list_add_valid+0xb8/0x420 [ 288.767935][ T8733] ? kmsan_get_metadata+0x11d/0x180 [ 288.773146][ T8733] ? ext4_readpage+0x3e0/0x3e0 [ 288.777905][ T8733] do_writepages+0x143/0x400 [ 288.782500][ T8733] ? kmsan_get_metadata+0x11d/0x180 [ 288.787706][ T8733] __filemap_fdatawrite_range+0x53b/0x5b0 [ 288.793442][ T8733] file_write_and_wait_range+0x1b8/0x3d0 [ 288.799351][ T8733] ext4_sync_file+0x464/0x1220 [ 288.804121][ T8733] ? ext4_getfsmap_compare+0x100/0x100 [ 288.809578][ T8733] vfs_fsync_range+0x2af/0x310 [ 288.814355][ T8733] ext4_buffered_write_iter+0x9fb/0xac0 [ 288.819899][ T8733] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 288.826052][ T8733] ext4_file_write_iter+0x1034/0x2dd0 [ 288.831423][ T8733] ? kmsan_internal_poison_shadow+0x9f/0xd0 [ 288.837312][ T8733] ? kmsan_internal_poison_shadow+0x66/0xd0 [ 288.843212][ T8733] ? kmsan_slab_free+0x6e/0xb0 [ 288.847988][ T8733] ? kmsan_get_metadata+0x11d/0x180 [ 288.853184][ T8733] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 288.859000][ T8733] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 288.865066][ T8733] ? kmsan_get_metadata+0x4f/0x180 [ 288.870192][ T8733] ? ext4_file_read_iter+0xa90/0xa90 [ 288.875477][ T8733] do_iter_readv_writev+0x94a/0xb10 [ 288.880804][ T8733] do_iter_write+0x303/0xdc0 [ 288.886009][ T8733] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 288.892167][ T8733] ? kmsan_get_metadata+0x11d/0x180 [ 288.897378][ T8733] ? ext4_file_read_iter+0xa90/0xa90 [ 288.902664][ T8733] vfs_iter_write+0x118/0x180 [ 288.907345][ T8733] iter_file_splice_write+0xb5f/0x1800 [ 288.912830][ T8733] ? splice_from_pipe+0x2f0/0x2f0 [ 288.917850][ T8733] direct_splice_actor+0x1fd/0x580 [ 288.922967][ T8733] ? kmsan_get_metadata+0x4f/0x180 [ 288.928084][ T8733] splice_direct_to_actor+0x6b2/0xf50 [ 288.933451][ T8733] ? do_splice_direct+0x580/0x580 [ 288.938496][ T8733] do_splice_direct+0x342/0x580 [ 288.943359][ T8733] do_sendfile+0x101b/0x1d40 [ 288.947970][ T8733] __se_compat_sys_sendfile+0x301/0x3c0 [ 288.953527][ T8733] ? kmsan_get_metadata+0x11d/0x180 [ 288.958722][ T8733] ? __ia32_sys_sendfile64+0x70/0x70 [ 288.964089][ T8733] __ia32_compat_sys_sendfile+0x56/0x70 [ 288.969635][ T8733] __do_fast_syscall_32+0x2aa/0x400 [ 288.974842][ T8733] do_fast_syscall_32+0x6b/0xd0 [ 288.979697][ T8733] do_SYSENTER_32+0x73/0x90 [ 288.984197][ T8733] entry_SYSENTER_compat_after_hwframe+0x4d/0x5c [ 288.990514][ T8733] RIP: 0023:0xf7f01549 [ 288.994564][ T8733] Code: Bad RIP value. [ 288.998614][ T8733] RSP: 002b:00000000f5cfc0cc EFLAGS: 00000296 ORIG_RAX: 00000000000000bb [ 289.007019][ T8733] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000004 [ 289.014992][ T8733] RDX: 0000000000000000 RSI: 0000000000010046 RDI: 0000000000000000 [ 289.022959][ T8733] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 289.030922][ T8733] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 289.038891][ T8733] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 289.046866][ T8733] [ 289.049185][ T8733] Uninit was stored to memory at: [ 289.054210][ T8733] kmsan_internal_chain_origin+0xad/0x130 [ 289.059923][ T8733] kmsan_memcpy_memmove_metadata+0x272/0x2e0 [ 289.065891][ T8733] kmsan_memcpy_metadata+0xb/0x10 [ 289.070905][ T8733] __msan_memcpy+0x43/0x50 [ 289.075319][ T8733] iov_iter_copy_from_user_atomic+0x11b1/0x1780 [ 289.081556][ T8733] generic_perform_write+0x499/0x9a0 [ 289.086834][ T8733] ext4_buffered_write_iter+0x795/0xac0 [ 289.092370][ T8733] ext4_file_write_iter+0x1034/0x2dd0 [ 289.097732][ T8733] do_iter_readv_writev+0x94a/0xb10 [ 289.102923][ T8733] do_iter_write+0x303/0xdc0 [ 289.107509][ T8733] vfs_iter_write+0x118/0x180 [ 289.112183][ T8733] iter_file_splice_write+0xb5f/0x1800 [ 289.117631][ T8733] direct_splice_actor+0x1fd/0x580 [ 289.122733][ T8733] splice_direct_to_actor+0x6b2/0xf50 [ 289.128092][ T8733] do_splice_direct+0x342/0x580 [ 289.132932][ T8733] do_sendfile+0x101b/0x1d40 [ 289.137532][ T8733] __se_compat_sys_sendfile+0x301/0x3c0 [ 289.143067][ T8733] __ia32_compat_sys_sendfile+0x56/0x70 [ 289.148607][ T8733] __do_fast_syscall_32+0x2aa/0x400 [ 289.153803][ T8733] do_fast_syscall_32+0x6b/0xd0 [ 289.158644][ T8733] do_SYSENTER_32+0x73/0x90 [ 289.163143][ T8733] entry_SYSENTER_compat_after_hwframe+0x4d/0x5c [ 289.169451][ T8733] [ 289.171765][ T8733] Uninit was created at: [ 289.176000][ T8733] kmsan_save_stack_with_flags+0x3c/0x90 [ 289.181624][ T8733] kmsan_alloc_page+0xb9/0x180 [ 289.186381][ T8733] __alloc_pages_nodemask+0x56a2/0x5dc0 [ 289.191920][ T8733] alloc_pages_current+0x672/0x990 [ 289.197021][ T8733] push_pipe+0x605/0xb70 [ 289.201255][ T8733] iov_iter_get_pages_alloc+0x18a9/0x21c0 [ 289.206967][ T8733] do_splice_to+0x4fc/0x14f0 [ 289.211553][ T8733] splice_direct_to_actor+0x45c/0xf50 [ 289.216917][ T8733] do_splice_direct+0x342/0x580 [ 289.221762][ T8733] do_sendfile+0x101b/0x1d40 [ 289.226344][ T8733] __se_compat_sys_sendfile+0x301/0x3c0 [ 289.231886][ T8733] __ia32_compat_sys_sendfile+0x56/0x70 [ 289.237423][ T8733] __do_fast_syscall_32+0x2aa/0x400 [ 289.242617][ T8733] do_fast_syscall_32+0x6b/0xd0 [ 289.247462][ T8733] do_SYSENTER_32+0x73/0x90 [ 289.251961][ T8733] entry_SYSENTER_compat_after_hwframe+0x4d/0x5c [ 289.258266][ T8733] [ 289.260583][ T8733] Bytes 0-1055 of 4096 are uninitialized [ 289.266200][ T8733] Memory access of size 4096 starts at ffff897d4d753000 [ 289.273114][ T8733] ===================================================== [ 289.280031][ T8733] Disabling lock debugging due to kernel taint [ 289.286172][ T8733] Kernel panic - not syncing: panic_on_warn set ... [ 289.292753][ T8733] CPU: 1 PID: 8733 Comm: syz-executor.0 Tainted: G B 5.8.0-rc5-syzkaller #0 [ 289.302800][ T8733] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 289.312841][ T8733] Call Trace: [ 289.316133][ T8733] dump_stack+0x1df/0x240 [ 289.320469][ T8733] panic+0x3d5/0xc3e [ 289.324387][ T8733] kmsan_report+0x1df/0x1e0 [ 289.328890][ T8733] kmsan_internal_check_memory+0x238/0x3d0 [ 289.334701][ T8733] kmsan_handle_dma+0x9f/0xb0 [ 289.339376][ T8733] virtqueue_add+0x46db/0x70f0 [ 289.344139][ T8733] ? kmsan_task_context_state+0x47/0x90 [ 289.349680][ T8733] ? kmsan_task_context_state+0x47/0x90 [ 289.355232][ T8733] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 289.361064][ T8733] virtqueue_add_sgs+0x319/0x330 [ 289.366017][ T8733] virtscsi_add_cmd+0x888/0xb20 [ 289.370885][ T8733] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 289.376689][ T8733] virtscsi_queuecommand+0xe72/0x1080 [ 289.382062][ T8733] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 289.387865][ T8733] ? kmsan_get_metadata+0x11d/0x180 [ 289.393065][ T8733] ? virtscsi_init+0x1220/0x1220 [ 289.397996][ T8733] scsi_queue_rq+0x3eb7/0x4b00 [ 289.402772][ T8733] ? scsi_vpd_tpg_id+0x3e0/0x3e0 [ 289.407706][ T8733] blk_mq_dispatch_rq_list+0x931/0x3430 [ 289.413251][ T8733] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 289.419059][ T8733] ? kmsan_get_metadata+0x11d/0x180 [ 289.424256][ T8733] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 289.430083][ T8733] ? __msan_metadata_ptr_for_load_4+0x20/0x20 [ 289.436155][ T8733] blk_mq_do_dispatch_sched+0x609/0x880 [ 289.441721][ T8733] __blk_mq_sched_dispatch_requests+0x60e/0x8f0 [ 289.447958][ T8733] ? __msan_metadata_ptr_for_store_8+0x13/0x20 [ 289.454110][ T8733] ? rb_insert_color+0xbbe/0x1180 [ 289.459132][ T8733] ? kmsan_get_metadata+0x11d/0x180 [ 289.464333][ T8733] blk_mq_sched_dispatch_requests+0x15d/0x2d0 [ 289.470401][ T8733] __blk_mq_run_hw_queue+0x171/0x3a0 [ 289.475686][ T8733] __blk_mq_delay_run_hw_queue+0x15d/0x6a0 [ 289.481493][ T8733] ? kmsan_get_metadata+0x11d/0x180 [ 289.486692][ T8733] blk_mq_run_hw_queue+0x4ac/0x670 [ 289.491809][ T8733] blk_mq_sched_insert_requests+0x496/0x640 [ 289.497711][ T8733] blk_mq_flush_plug_list+0xb21/0xca0 [ 289.503094][ T8733] blk_flush_plug_list+0x72f/0x7b0 [ 289.508204][ T8733] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 289.514273][ T8733] blk_finish_plug+0xa0/0xd0 [ 289.518870][ T8733] ext4_writepages+0x59d0/0x64c0 [ 289.523860][ T8733] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 289.529920][ T8733] ? __list_add_valid+0xb8/0x420 [ 289.534852][ T8733] ? kmsan_get_metadata+0x11d/0x180 [ 289.540050][ T8733] ? ext4_readpage+0x3e0/0x3e0 [ 289.544809][ T8733] do_writepages+0x143/0x400 [ 289.549397][ T8733] ? kmsan_get_metadata+0x11d/0x180 [ 289.554600][ T8733] __filemap_fdatawrite_range+0x53b/0x5b0 [ 289.560331][ T8733] file_write_and_wait_range+0x1b8/0x3d0 [ 289.565966][ T8733] ext4_sync_file+0x464/0x1220 [ 289.570736][ T8733] ? ext4_getfsmap_compare+0x100/0x100 [ 289.576191][ T8733] vfs_fsync_range+0x2af/0x310 [ 289.580962][ T8733] ext4_buffered_write_iter+0x9fb/0xac0 [ 289.586511][ T8733] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 289.592670][ T8733] ext4_file_write_iter+0x1034/0x2dd0 [ 289.598041][ T8733] ? kmsan_internal_poison_shadow+0x9f/0xd0 [ 289.603930][ T8733] ? kmsan_internal_poison_shadow+0x66/0xd0 [ 289.609817][ T8733] ? kmsan_slab_free+0x6e/0xb0 [ 289.614578][ T8733] ? kmsan_get_metadata+0x11d/0x180 [ 289.619772][ T8733] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 289.625572][ T8733] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 289.631633][ T8733] ? kmsan_get_metadata+0x4f/0x180 [ 289.636753][ T8733] ? ext4_file_read_iter+0xa90/0xa90 [ 289.642031][ T8733] do_iter_readv_writev+0x94a/0xb10 [ 289.647240][ T8733] do_iter_write+0x303/0xdc0 [ 289.651834][ T8733] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 289.657984][ T8733] ? kmsan_get_metadata+0x11d/0x180 [ 289.663185][ T8733] ? ext4_file_read_iter+0xa90/0xa90 [ 289.668467][ T8733] vfs_iter_write+0x118/0x180 [ 289.673149][ T8733] iter_file_splice_write+0xb5f/0x1800 [ 289.678628][ T8733] ? splice_from_pipe+0x2f0/0x2f0 [ 289.683651][ T8733] direct_splice_actor+0x1fd/0x580 [ 289.688764][ T8733] ? kmsan_get_metadata+0x4f/0x180 [ 289.693876][ T8733] splice_direct_to_actor+0x6b2/0xf50 [ 289.699244][ T8733] ? do_splice_direct+0x580/0x580 [ 289.704283][ T8733] do_splice_direct+0x342/0x580 [ 289.709156][ T8733] do_sendfile+0x101b/0x1d40 [ 289.713779][ T8733] __se_compat_sys_sendfile+0x301/0x3c0 [ 289.719343][ T8733] ? kmsan_get_metadata+0x11d/0x180 [ 289.724540][ T8733] ? __ia32_sys_sendfile64+0x70/0x70 [ 289.729825][ T8733] __ia32_compat_sys_sendfile+0x56/0x70 [ 289.735372][ T8733] __do_fast_syscall_32+0x2aa/0x400 [ 289.740581][ T8733] do_fast_syscall_32+0x6b/0xd0 [ 289.745433][ T8733] do_SYSENTER_32+0x73/0x90 [ 289.749935][ T8733] entry_SYSENTER_compat_after_hwframe+0x4d/0x5c [ 289.756263][ T8733] RIP: 0023:0xf7f01549 [ 289.760316][ T8733] Code: Bad RIP value. [ 289.764376][ T8733] RSP: 002b:00000000f5cfc0cc EFLAGS: 00000296 ORIG_RAX: 00000000000000bb [ 289.772789][ T8733] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000004 [ 289.780754][ T8733] RDX: 0000000000000000 RSI: 0000000000010046 RDI: 0000000000000000 [ 289.788716][ T8733] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 289.796684][ T8733] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 289.804648][ T8733] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 289.813808][ T8733] Kernel Offset: 0x10800000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 289.825415][ T8733] Rebooting in 86400 seconds..