[....] Starting enhanced syslogd: rsyslogd[ 11.468753] audit: type=1400 audit(1514911661.673:5): avc: denied { syslog } for pid=3313 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 16.114444] audit: type=1400 audit(1514911666.319:6): avc: denied { map } for pid=3450 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.11' (ECDSA) to the list of known hosts. net.ipv6.conf.syz1.accept_dad = 0 net.ipv6.conf.syz5.accept_dad = 0 [ 91.409437] audit: type=1400 audit(1514911741.614:7): avc: denied { map } for pid=3468 comm="syzkaller090840" path="/root/syzkaller090840834" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 net.ipv6.conf.syz7.accept_dad = 0 net.ipv6.conf.syz3.accept_dad = 0 net.ipv6.conf.syz4.accept_dad = 0 net.ipv6.conf.syz6.accept_dad = 0 net.ipv6.conf.syz1.router_solicitations = 0 net.ipv6.conf.syz2.accept_dad = 0 net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz5.router_solicitations = 0 net.ipv6.conf.syz3.router_solicitations = 0 net.ipv6.conf.syz7.router_solicitations = 0 net.ipv6.conf.syz4.router_solicitations = 0 net.ipv6.conf.syz6.router_solicitations = 0 net.ipv6.conf.syz2.router_solicitations = 0 net.ipv6.conf.syz0.router_solicitations = 0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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 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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 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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 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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 program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 131.764374] ================================================================== [ 131.771807] BUG: KASAN: null-ptr-deref in linear_transfer+0x64a/0x900 [ 131.778368] Write of size 2 at addr (null) by task syzkaller090840/26082 [ 131.786050] [ 131.787667] CPU: 0 PID: 26082 Comm: syzkaller090840 Not tainted 4.15.0-rc6-next-20180102+ #86 [ 131.796307] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 131.805634] Call Trace: [ 131.808200] dump_stack+0x137/0x198 [ 131.811807] ? linear_transfer+0x64a/0x900 [ 131.816019] kasan_report+0x13f/0x360 [ 131.819795] check_memory_region+0x137/0x190 [ 131.824172] memcpy+0x37/0x50 [ 131.827253] linear_transfer+0x64a/0x900 [ 131.831289] ? __lock_acquire+0x63e/0x3cf0 [ 131.835505] ? snd_pcm_plugin_build_copy+0x360/0x360 [ 131.840580] ? check_noncircular+0x20/0x20 [ 131.844804] snd_pcm_plug_write_transfer+0x20b/0x390 [ 131.849889] ? snd_pcm_plug_client_channels_buf+0x3f0/0x3f0 [ 131.855569] ? snd_pcm_format_physical_width+0x5b/0x70 [ 131.860822] ? snd_pcm_plug_client_channels_buf+0x1db/0x3f0 [ 131.866518] snd_pcm_oss_write2+0x22e/0x3c0 [ 131.870811] ? snd_pcm_oss_write3+0x1b0/0x1b0 [ 131.875279] ? add_wait_queue+0x107/0x160 [ 131.879412] snd_pcm_oss_sync1+0x158/0x4b0 [ 131.883618] ? kmem_cache_free+0x83/0x2a0 [ 131.887735] ? snd_pcm_oss_write2+0x3c0/0x3c0 [ 131.892202] ? do_group_exit+0x108/0x320 [ 131.896241] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 131.901398] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 131.906556] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 131.911727] ? wake_up_q+0xe0/0xe0 executing program executing program executing program [ 131.915245] ? snd_pcm_format_set_silence+0x171/0x4b0 [ 131.920419] snd_pcm_oss_sync+0x4f2/0x710 [ 131.924546] ? fcntl_setlk+0xc40/0xc40 [ 131.928409] ? snd_pcm_oss_sync+0x710/0x710 [ 131.932699] snd_pcm_oss_release+0x20b/0x280 [ 131.937080] __fput+0x291/0x6e0 [ 131.940335] ____fput+0x15/0x20 [ 131.943583] task_work_run+0x122/0x1a0 [ 131.947443] do_exit+0x7f4/0x2da0 [ 131.950875] ? mm_update_next_owner+0x690/0x690 [ 131.955515] ? find_held_lock+0x35/0x1e0 [ 131.959569] ? get_signal+0x644/0x1460 executing program executing program [ 131.963447] ? lock_downgrade+0x860/0x860 [ 131.967583] do_group_exit+0x108/0x320 [ 131.971446] get_signal+0x5e9/0x1460 [ 131.975142] do_signal+0x7f/0x1980 [ 131.978656] ? __might_sleep+0x95/0x190 [ 131.982604] ? find_held_lock+0x35/0x1e0 [ 131.986649] ? setup_sigcontext+0x7d0/0x7d0 [ 131.990948] ? snd_pcm_oss_release+0x280/0x280 [ 131.995504] ? do_vfs_ioctl+0x439/0xfe0 [ 131.999450] ? selinux_file_ioctl+0x354/0x540 [ 132.003925] ? lock_downgrade+0x860/0x860 [ 132.008071] ? SyS_futex+0x1fd/0x2b0 [ 132.011774] ? exit_to_usermode_loop+0x3f/0x210 [ 132.016421] exit_to_usermode_loop+0x1aa/0x210 [ 132.020978] syscall_return_slowpath+0x383/0x430 [ 132.025708] entry_SYSCALL_64_fastpath+0x98/0x9a [ 132.030434] RIP: 0033:0x44ac19 [ 132.033597] RSP: 002b:00007f1debbb3da8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 132.041277] RAX: fffffffffffffe00 RBX: 00000000006dcc3c RCX: 000000000044ac19 [ 132.048520] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000006dcc3c [ 132.055762] RBP: 00000000006dcc38 R08: 0000000000000000 R09: 0000000000000000 executing program executing program executing program executing program executing program executing program [ 132.063006] R10: 0000000000000000 R11: 0000000000000246 R12: 6fd5446e47d1c1dd [ 132.070250] R13: 04a85bf0c3063392 R14: 0f17db8f3ad16a87 R15: 000000000000000d [ 132.077522] ================================================================== [ 132.084865] Disabling lock debugging due to kernel taint [ 132.090439] Kernel panic - not syncing: panic_on_warn set ... [ 132.090439] [ 132.097790] CPU: 0 PID: 26082 Comm: syzkaller090840 Tainted: G B 4.15.0-rc6-next-20180102+ #86 [ 132.107745] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 132.117093] Call Trace: [ 132.119686] dump_stack+0x137/0x198 [ 132.123304] ? linear_transfer+0x590/0x900 [ 132.127512] panic+0x1e4/0x41c [ 132.130676] ? refcount_error_report+0x214/0x214 [ 132.135399] ? add_taint+0x1c/0x50 [ 132.138905] ? add_taint+0x1c/0x50 [ 132.142412] ? linear_transfer+0x64a/0x900 [ 132.146615] kasan_end_report+0x50/0x50 [ 132.150555] kasan_report+0x148/0x360 [ 132.154329] check_memory_region+0x137/0x190 [ 132.158704] memcpy+0x37/0x50 [ 132.161778] linear_transfer+0x64a/0x900 [ 132.165811] ? __lock_acquire+0x63e/0x3cf0 [ 132.170019] ? snd_pcm_plugin_build_copy+0x360/0x360 [ 132.175090] ? check_noncircular+0x20/0x20 [ 132.179295] snd_pcm_plug_write_transfer+0x20b/0x390 [ 132.184373] ? snd_pcm_plug_client_channels_buf+0x3f0/0x3f0 [ 132.190051] ? snd_pcm_format_physical_width+0x5b/0x70 [ 132.195296] ? snd_pcm_plug_client_channels_buf+0x1db/0x3f0 [ 132.200977] snd_pcm_oss_write2+0x22e/0x3c0 [ 132.205266] ? snd_pcm_oss_write3+0x1b0/0x1b0 [ 132.209746] ? add_wait_queue+0x107/0x160 [ 132.213862] snd_pcm_oss_sync1+0x158/0x4b0 [ 132.218068] ? kmem_cache_free+0x83/0x2a0 [ 132.222183] ? snd_pcm_oss_write2+0x3c0/0x3c0 [ 132.226643] ? do_group_exit+0x108/0x320 [ 132.230674] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 132.235831] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 132.240985] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 132.246142] ? wake_up_q+0xe0/0xe0 [ 132.249650] ? snd_pcm_format_set_silence+0x171/0x4b0 [ 132.254811] snd_pcm_oss_sync+0x4f2/0x710 [ 132.258928] ? fcntl_setlk+0xc40/0xc40 [ 132.262783] ? snd_pcm_oss_sync+0x710/0x710 [ 132.267075] snd_pcm_oss_release+0x20b/0x280 [ 132.271448] __fput+0x291/0x6e0 [ 132.274698] ____fput+0x15/0x20 [ 132.277942] task_work_run+0x122/0x1a0 [ 132.281801] do_exit+0x7f4/0x2da0 [ 132.285224] ? mm_update_next_owner+0x690/0x690 [ 132.289859] ? find_held_lock+0x35/0x1e0 [ 132.293892] ? get_signal+0x644/0x1460 [ 132.297744] ? lock_downgrade+0x860/0x860 [ 132.301863] do_group_exit+0x108/0x320 [ 132.305717] get_signal+0x5e9/0x1460 [ 132.309405] do_signal+0x7f/0x1980 [ 132.312915] ? __might_sleep+0x95/0x190 [ 132.316854] ? find_held_lock+0x35/0x1e0 [ 132.320888] ? setup_sigcontext+0x7d0/0x7d0 [ 132.325177] ? snd_pcm_oss_release+0x280/0x280 [ 132.330301] ? do_vfs_ioctl+0x439/0xfe0 [ 132.334244] ? selinux_file_ioctl+0x354/0x540 [ 132.338707] ? lock_downgrade+0x860/0x860 [ 132.342825] ? SyS_futex+0x1fd/0x2b0 [ 132.346507] ? exit_to_usermode_loop+0x3f/0x210 [ 132.351146] exit_to_usermode_loop+0x1aa/0x210 [ 132.355698] syscall_return_slowpath+0x383/0x430 [ 132.360422] entry_SYSCALL_64_fastpath+0x98/0x9a [ 132.365143] RIP: 0033:0x44ac19 [ 132.368300] RSP: 002b:00007f1debbb3da8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 132.375972] RAX: fffffffffffffe00 RBX: 00000000006dcc3c RCX: 000000000044ac19 [ 132.383208] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000006dcc3c [ 132.390444] RBP: 00000000006dcc38 R08: 0000000000000000 R09: 0000000000000000 [ 132.397679] R10: 0000000000000000 R11: 0000000000000246 R12: 6fd5446e47d1c1dd [ 132.404914] R13: 04a85bf0c3063392 R14: 0f17db8f3ad16a87 R15: 000000000000000d [ 132.412528] Dumping ftrace buffer: [ 132.416034] (ftrace buffer empty) [ 132.419710] Kernel Offset: disabled [ 132.423302] Rebooting in 86400 seconds..