INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] 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 '10.128.0.9' (ECDSA) to the list of known hosts. 2018/04/06 23:32:59 fuzzer started 2018/04/06 23:32:59 dialing manager at 10.128.0.26:38639 2018/04/06 23:33:05 kcov=true, comps=false 2018/04/06 23:33:08 executing program 0: r0 = syz_open_dev$sndseq(&(0x7f00000000c0)='/dev/snd/seq\x00', 0x0, 0x0) ioctl$SNDRV_SEQ_IOCTL_CREATE_QUEUE(r0, 0xc08c5332, &(0x7f0000000100)={0x0, 0x0, 0x0, 'queue1\x00'}) ioctl$SNDRV_SEQ_IOCTL_SET_QUEUE_TIMER(r0, 0x40605346, &(0x7f00000001c0)) 2018/04/06 23:33:08 executing program 1: r0 = syz_open_dev$loop(&(0x7f0000000600)='/dev/loop#\x00', 0x0, 0x82) r1 = memfd_create(&(0x7f00000000c0)="74086e750000000000000000008c00", 0x0) pwritev(r1, &(0x7f0000f50f90)=[{&(0x7f0000000040)="aa", 0x1}], 0x1, 0x81006) openat$loop_ctrl(0xffffffffffffff9c, &(0x7f0000000200)='/dev/loop-control\x00', 0x0, 0x0) ioctl$LOOP_CHANGE_FD(r0, 0x4c00, r1) sendfile(r0, r0, &(0x7f0000000080), 0x102000004) ioctl$LOOP_CLR_FD(r0, 0x4c01) mq_open(&(0x7f0000000500)='queue1\x00', 0x0, 0x0, &(0x7f0000000640)={0x0, 0x0, 0x0, 0xa96, 0x0, 0x0, 0x0, 0x100}) 2018/04/06 23:33:08 executing program 7: r0 = syz_open_dev$evdev(&(0x7f0000000540)='/dev/input/event#\x00', 0x0, 0x2) readv(r0, &(0x7f0000019fe0)=[{&(0x7f00008ec000)=""/219, 0xdb}], 0x1) write$evdev(r0, &(0x7f000004d000)=[{{}, 0x0, 0x1}, {{0x2}}], 0x30) 2018/04/06 23:33:08 executing program 2: r0 = socket$inet(0x2, 0x2, 0x0) setsockopt$EBT_SO_SET_ENTRIES(r0, 0x0, 0x80, &(0x7f0000000180)=@broute={'broute\x00', 0x20, 0x1, 0x1d8, [0x0, 0x0, 0x0, 0x0, 0x0, 0x20000240], 0x0, &(0x7f0000000040), &(0x7f0000000240)=[{0x0, '\x00', 0x0, 0xffffffffffffffff}, {0x0, '\x00', 0x0, 0xfffffffffffffffe}, {0x0, '\x00', 0x0, 0xffffffffffffffff, 0x1, [{{{0xd, 0x0, 0x0, 'erspan0\x00', 'ip6_vti0\x00', 'ip6gretap0\x00', 'ip6_vti0\x00', @link_local={0x1, 0x80, 0xc2}, [], @link_local={0x1, 0x80, 0xc2}, [], 0xc0, 0x110, 0x148, [@nfacct={'nfacct\x00', 0x28, {{'syz1\x00'}}}]}, [@common=@log={'log\x00', 0x28, {{0x0, "b03c44a4ab993f21a642a6c98d9b52352c6a94ffbc6987f2fc82b348efe3"}}}]}, @common=@mark={'mark\x00', 0x10}}]}]}, 0x250) 2018/04/06 23:33:08 executing program 3: mkdir(&(0x7f000053bff8)='./file0\x00', 0x0) mount(&(0x7f0000000a80)='./file0\x00', &(0x7f00000008c0)='./file0\x00', &(0x7f0000000a40)='sysfs\x00', 0x0, &(0x7f0000cde000)) r0 = open(&(0x7f0000000080)='./file0\x00', 0x0, 0x0) getdents64(r0, &(0x7f00000000c0)=""/250, 0xfa) 2018/04/06 23:33:08 executing program 4: r0 = syz_open_dev$loop(&(0x7f0000000000)='/dev/loop#\x00', 0x0, 0x0) ioctl(r0, 0x40000000401070ca, &(0x7f0000071000)) 2018/04/06 23:33:08 executing program 5: pipe(&(0x7f0000000340)={0xffffffffffffffff, 0xffffffffffffffff}) flock(r1, 0x2000000000002) flock(r0, 0x1) flock(r1, 0x1) 2018/04/06 23:33:08 executing program 6: perf_event_open(&(0x7f000001d000)={0x2, 0x78, 0xe2, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xff}, 0x0, 0x0, 0xffffffffffffffff, 0x0) socketpair$unix(0x1, 0x1, 0x0, &(0x7f0000040ff8)={0xffffffffffffffff, 0xffffffffffffffff}) recvfrom$unix(r0, &(0x7f0000000080)=""/25, 0x19, 0x0, &(0x7f00000000c0)=@abs, 0x8) shutdown(r1, 0x1) syzkaller login: [ 44.666462] ip (3764) used greatest stack depth: 54688 bytes left [ 45.219543] ip (3816) used greatest stack depth: 54200 bytes left [ 46.239929] ip (3916) used greatest stack depth: 53960 bytes left [ 47.998577] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 48.061013] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 48.307506] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 48.337587] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 48.469990] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 48.492110] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 48.513586] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 48.560683] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 56.848428] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 57.108128] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 57.196214] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 57.268771] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 57.345841] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 57.459927] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 57.475501] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 57.545859] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 57.629827] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 57.636124] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 57.649934] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 57.846796] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 57.853101] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 57.877950] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 57.997722] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 58.003989] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 58.015529] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 58.065258] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 58.071532] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 58.083933] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 58.117851] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 58.126338] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 58.163113] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 58.204215] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 58.210633] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 58.222525] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 58.310811] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 58.317294] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 58.324728] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 58.356699] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 58.367572] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 58.395849] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 58.883296] ALSA: seq fatal error: cannot create timer (-22) [ 58.966132] ALSA: seq fatal error: cannot create timer (-22) 2018/04/06 23:33:26 executing program 0: r0 = syz_open_dev$loop(&(0x7f0000ca9ff5)='/dev/loop#\x00', 0x0, 0x105082) r1 = memfd_create(&(0x7f0000000140)="000000008c00000000000000000000", 0x0) pwritev(r1, &(0x7f0000f50f90)=[{&(0x7f0000000100)="a8", 0x1}], 0x1, 0x81003) ioctl$LOOP_CHANGE_FD(r0, 0x4c00, r1) sendfile(r0, r1, &(0x7f00000ddff8)=0xe00, 0x102000001) 2018/04/06 23:33:26 executing program 2: r0 = syz_open_dev$tun(&(0x7f00000000c0)='/dev/net/tun\x00', 0x0, 0x0) ioctl$TUNSETIFF(r0, 0x400454ca, &(0x7f0000000040)={"6966623000faffffffffffffff00", 0x5001}) 2018/04/06 23:33:26 executing program 3: r0 = socket$inet(0x2, 0x4000000000000001, 0x0) setsockopt$inet_tcp_int(r0, 0x6, 0x80000000000002, &(0x7f0000000080)=0x800, 0x4) bind$inet(r0, &(0x7f0000deb000)={0x2, 0x4e23, @multicast1=0xe0000001}, 0x10) setsockopt$SO_ATTACH_FILTER(r0, 0x1, 0x1a, &(0x7f0000b86000)={0x1, &(0x7f0000f40ff8)=[{0x6, 0x0, 0x0, 0xe8}]}, 0x10) sendto$inet(r0, &(0x7f0000a88f88), 0x29f, 0x200007fd, &(0x7f0000e68000)={0x2, 0x4e23, @loopback=0x7f000001}, 0x10) sendmmsg(r0, &(0x7f000000e1c0)=[{{&(0x7f0000000780)=@pppoe={0x18, 0x0, {0x0, @link_local={0x1, 0x80, 0xc2}, 'nr0\x00'}}, 0x80, &(0x7f0000001580)=[{&(0x7f0000004940)="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", 0x7f5}], 0x1, &(0x7f0000006e00)}}], 0x1, 0x8050) 2018/04/06 23:33:26 executing program 4: r0 = syz_open_dev$sg(&(0x7f00003e5ff7)='/dev/sg#\x00', 0x0, 0x0) sendto$inet(0xffffffffffffffff, &(0x7f0000000100)="93", 0x1, 0x0, 0x0, 0x0) ioctl(r0, 0x2271, &(0x7f0000039ffe)) 2018/04/06 23:33:26 executing program 7: r0 = socket$inet6(0xa, 0x2, 0x0) connect$inet6(r0, &(0x7f0000000300)={0xa, 0x0, 0x0, @ipv4={[], [0xff, 0xff], @remote={0xac, 0x14, 0x14, 0xbb}}}, 0x1c) sendmmsg(r0, &(0x7f0000007f00)=[{{&(0x7f0000000180)=@in6={0xa, 0x4e23, 0x0, @mcast1={0xff, 0x1, [], 0x1}}, 0x80, &(0x7f0000000a00)}}], 0x1, 0x0) 2018/04/06 23:33:26 executing program 1: r0 = socket$inet(0x2, 0x840000000003, 0x2) setsockopt$inet_int(r0, 0x0, 0xc8, &(0x7f0000000040), 0x4) 2018/04/06 23:33:26 executing program 5: r0 = socket(0x2, 0x80002, 0x0) connect$netlink(r0, &(0x7f0000000000)=@unspec, 0xc) 2018/04/06 23:33:26 executing program 6: perf_event_open(&(0x7f000001d000)={0x2, 0x78, 0xe2, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xff}, 0x0, 0x0, 0xffffffffffffffff, 0x0) socketpair$unix(0x1, 0x1, 0x0, &(0x7f0000040ff8)={0xffffffffffffffff, 0xffffffffffffffff}) recvfrom$unix(r0, &(0x7f0000000080)=""/25, 0x19, 0x0, &(0x7f00000000c0)=@abs, 0x8) shutdown(r1, 0x1) [ 60.474561] ================================================================== [ 60.481976] BUG: KMSAN: uninit-value in copy_page_to_iter+0x754/0x1b70 [ 60.488640] CPU: 0 PID: 5103 Comm: blkid Not tainted 4.16.0+ #81 [ 60.494777] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.504209] Call Trace: [ 60.506798] dump_stack+0x185/0x1d0 [ 60.510417] ? kmsan_internal_check_memory+0x145/0x1d0 [ 60.515688] kmsan_report+0x142/0x240 [ 60.519487] kmsan_internal_check_memory+0x164/0x1d0 [ 60.524581] kmsan_copy_to_user+0x69/0x160 [ 60.528803] copy_page_to_iter+0x754/0x1b70 [ 60.533113] generic_file_read_iter+0x2ee8/0x43f0 [ 60.537950] blkdev_read_iter+0x20d/0x280 [ 60.542082] ? blkdev_write_iter+0x5f0/0x5f0 [ 60.546469] __vfs_read+0x6fb/0x8e0 [ 60.550083] vfs_read+0x36c/0x6c0 [ 60.553519] SYSC_read+0x172/0x360 [ 60.557043] SyS_read+0x55/0x80 [ 60.560304] do_syscall_64+0x309/0x430 [ 60.564172] ? vfs_write+0x8d0/0x8d0 [ 60.567868] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 60.573036] RIP: 0033:0x7f5f2da76310 [ 60.576726] RSP: 002b:00007ffd0f75ab98 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 60.584414] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5f2da76310 [ 60.591663] RDX: 0000000000000400 RSI: 00000000025b3c58 RDI: 0000000000000003 [ 60.598913] RBP: 00000000025b3c30 R08: 0000000000000028 R09: 0000000001680000 [ 60.606160] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000025b3030 [ 60.613405] R13: 0000000000000400 R14: 00000000025b3080 R15: 00000000025b3c48 [ 60.620654] [ 60.622254] Uninit was stored to memory at: [ 60.626554] kmsan_internal_chain_origin+0x12b/0x210 [ 60.631634] kmsan_memcpy_origins+0x11d/0x170 [ 60.636109] __msan_memcpy+0x19f/0x1f0 [ 60.639975] _copy_to_iter+0x852/0x28f0 [ 60.643928] copy_page_to_iter+0x383/0x1b70 [ 60.648230] shmem_file_read_iter+0x99f/0x1180 [ 60.652788] do_iter_readv_writev+0x7bb/0x970 [ 60.657260] do_iter_read+0x303/0xd70 [ 60.661040] vfs_iter_read+0x118/0x180 [ 60.664904] loop_queue_work+0x270e/0x3ef0 [ 60.669116] kthread_worker_fn+0x58f/0x900 [ 60.673331] loop_kthread_worker_fn+0x90/0xb0 [ 60.677800] kthread+0x539/0x720 [ 60.681142] ret_from_fork+0x35/0x40 [ 60.684835] Uninit was stored to memory at: [ 60.689136] kmsan_internal_chain_origin+0x12b/0x210 [ 60.694217] kmsan_memcpy_origins+0x11d/0x170 [ 60.698689] __msan_memcpy+0x19f/0x1f0 [ 60.702556] iov_iter_copy_from_user_atomic+0xb04/0x17d0 [ 60.707986] generic_perform_write+0x4c6/0x990 [ 60.712548] __generic_file_write_iter+0x43b/0x990 [ 60.717456] generic_file_write_iter+0x814/0xbf0 [ 60.722191] do_iter_readv_writev+0x7bb/0x970 [ 60.726665] do_iter_write+0x30d/0xd40 [ 60.730533] vfs_iter_write+0x118/0x180 [ 60.734483] lo_write_bvec+0x215/0x550 [ 60.738350] loop_queue_work+0x324a/0x3ef0 [ 60.742562] kthread_worker_fn+0x58f/0x900 [ 60.746777] loop_kthread_worker_fn+0x90/0xb0 [ 60.751251] kthread+0x539/0x720 [ 60.754596] ret_from_fork+0x35/0x40 [ 60.758283] Uninit was created at: [ 60.761802] kmsan_alloc_meta_for_pages+0x161/0x3a0 [ 60.766794] kmsan_alloc_page+0x82/0xe0 [ 60.770748] __alloc_pages_nodemask+0xf5b/0x5dc0 [ 60.775489] alloc_pages_vma+0xcc8/0x1800 [ 60.779617] shmem_alloc_and_acct_page+0x6d5/0x1000 [ 60.784610] shmem_getpage_gfp+0x35db/0x5770 [ 60.788995] shmem_file_read_iter+0x508/0x1180 [ 60.793561] generic_file_splice_read+0x4e8/0x830 [ 60.798382] splice_direct_to_actor+0x4c6/0x1040 [ 60.803118] do_splice_direct+0x335/0x540 [ 60.807242] do_sendfile+0x1067/0x1e40 [ 60.811111] SYSC_sendfile64+0x1b3/0x300 [ 60.815154] SyS_sendfile64+0x64/0x90 [ 60.818932] do_syscall_64+0x309/0x430 [ 60.822798] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 60.827958] [ 60.829563] Bytes 0-1023 of 1024 are uninitialized [ 60.834466] ================================================================== [ 60.841798] Disabling lock debugging due to kernel taint [ 60.847224] Kernel panic - not syncing: panic_on_warn set ... [ 60.847224] [ 60.854741] CPU: 0 PID: 5103 Comm: blkid Tainted: G B 4.16.0+ #81 [ 60.862159] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.871485] Call Trace: [ 60.874053] dump_stack+0x185/0x1d0 [ 60.877663] panic+0x39d/0x940 [ 60.880848] ? kmsan_internal_check_memory+0x145/0x1d0 [ 60.886103] kmsan_report+0x238/0x240 [ 60.889885] kmsan_internal_check_memory+0x164/0x1d0 [ 60.894969] kmsan_copy_to_user+0x69/0x160 [ 60.899183] copy_page_to_iter+0x754/0x1b70 [ 60.903492] generic_file_read_iter+0x2ee8/0x43f0 [ 60.908327] blkdev_read_iter+0x20d/0x280 [ 60.912890] ? blkdev_write_iter+0x5f0/0x5f0 [ 60.917279] __vfs_read+0x6fb/0x8e0 [ 60.920895] vfs_read+0x36c/0x6c0 [ 60.924329] SYSC_read+0x172/0x360 [ 60.927851] SyS_read+0x55/0x80 [ 60.931109] do_syscall_64+0x309/0x430 [ 60.934976] ? vfs_write+0x8d0/0x8d0 [ 60.938671] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 60.943838] RIP: 0033:0x7f5f2da76310 [ 60.947528] RSP: 002b:00007ffd0f75ab98 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 60.955212] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5f2da76310 [ 60.962461] RDX: 0000000000000400 RSI: 00000000025b3c58 RDI: 0000000000000003 [ 60.969709] RBP: 00000000025b3c30 R08: 0000000000000028 R09: 0000000001680000 [ 60.976955] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000025b3030 [ 60.984203] R13: 0000000000000400 R14: 00000000025b3080 R15: 00000000025b3c48 [ 60.991862] Dumping ftrace buffer: [ 60.995383] (ftrace buffer empty) [ 60.999064] Kernel Offset: disabled [ 61.002665] Rebooting in 86400 seconds..