[ 34.718444] audit: type=1800 audit(1575433431.151:33): pid=6925 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0 [ 34.740984] audit: type=1800 audit(1575433431.161:34): pid=6925 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="startpar" name="rmnologin" dev="sda1" ino=2456 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 37.616441] random: sshd: uninitialized urandom read (32 bytes read) [ 37.925573] audit: type=1400 audit(1575433434.361:35): avc: denied { map } for pid=7098 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 [ 38.006527] random: sshd: uninitialized urandom read (32 bytes read) [ 38.605939] random: sshd: uninitialized urandom read (32 bytes read) [ 77.343739] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.1.59' (ECDSA) to the list of known hosts. [ 83.257157] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program [ 83.372344] audit: type=1400 audit(1575433479.811:36): avc: denied { map } for pid=7110 comm="syz-executor388" path="/root/syz-executor388556077" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 83.432307] hrtimer: interrupt took 42284 ns executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 131.582056] ================================================================== [ 131.589594] BUG: KASAN: slab-out-of-bounds in linear_transfer+0x5db/0x840 [ 131.596660] Read of size 1 at addr ffff8880a1adfac0 by task syz-executor388/11073 [ 131.604264] [ 131.605890] CPU: 0 PID: 11073 Comm: syz-executor388 Not tainted 4.14.157-syzkaller #0 [ 131.613858] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 131.623196] Call Trace: [ 131.625778] dump_stack+0x142/0x197 [ 131.629397] ? linear_transfer+0x5db/0x840 [ 131.633641] print_address_description.cold+0x7c/0x1dc [ 131.638908] ? linear_transfer+0x5db/0x840 [ 131.643138] kasan_report.cold+0xa9/0x2af [ 131.647332] check_memory_region+0x123/0x190 [ 131.651734] memcpy+0x24/0x50 [ 131.654841] linear_transfer+0x5db/0x840 [ 131.658910] ? snd_pcm_plugin_build_copy+0x350/0x350 [ 131.664096] ? snd_pcm_plug_slave_size+0x17d/0x2c0 [ 131.669023] snd_pcm_plug_read_transfer+0x158/0x260 [ 131.674042] ? snd_pcm_plug_write_transfer+0x340/0x340 executing program [ 131.679321] snd_pcm_oss_read2+0x1c2/0x370 [ 131.683545] ? snd_pcm_oss_read3+0x370/0x370 [ 131.687938] ? snd_pcm_oss_make_ready_locked+0x87/0x120 [ 131.693293] snd_pcm_oss_read+0x482/0x5d0 [ 131.697436] ? fsnotify+0x92f/0x11e0 [ 131.701152] __vfs_read+0x105/0x6a0 [ 131.704779] ? __fsnotify_update_child_dentry_flags.part.0+0x300/0x300 [ 131.711436] ? snd_pcm_oss_read2+0x370/0x370 [ 131.715830] ? vfs_copy_file_range+0xa40/0xa40 [ 131.720403] ? __inode_security_revalidate+0xd6/0x130 [ 131.725586] ? avc_policy_seqno+0x9/0x20 [ 131.729734] ? selinux_file_permission+0x85/0x480 [ 131.734582] ? security_file_permission+0x89/0x1f0 [ 131.739507] ? rw_verify_area+0xea/0x2b0 [ 131.743565] vfs_read+0x137/0x350 [ 131.747019] SyS_read+0xfd/0x230 [ 131.750389] ? kernel_write+0x120/0x120 [ 131.754357] ? do_syscall_64+0x53/0x640 [ 131.760595] ? kernel_write+0x120/0x120 [ 131.764676] do_syscall_64+0x1e8/0x640 [ 131.768794] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 131.773646] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 131.778821] RIP: 0033:0x44a759 executing program executing program [ 131.782000] RSP: 002b:00007f52814f0da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 131.789695] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 000000000044a759 [ 131.796962] RDX: 0000000000000313 RSI: 0000000020000380 RDI: 0000000000000004 [ 131.804241] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 131.811507] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 131.818782] R13: 0000000020000300 R14: 00000000004aea98 R15: 0000000000000000 [ 131.826050] [ 131.827660] Allocated by task 11073: [ 131.831465] save_stack_trace+0x16/0x20 [ 131.835596] save_stack+0x45/0xd0 [ 131.839041] kasan_kmalloc+0xce/0xf0 [ 131.842753] __kmalloc_node+0x51/0x80 [ 131.847501] kvmalloc_node+0x4e/0xe0 [ 131.851199] snd_pcm_plugin_alloc+0x4da/0x740 [ 131.855690] snd_pcm_plug_alloc+0x13f/0x300 [ 131.860006] snd_pcm_oss_change_params_locked+0x1d6e/0x32f0 [ 131.865715] snd_pcm_oss_change_params+0x63/0xb0 [ 131.870478] snd_pcm_oss_get_active_substream+0x102/0x150 [ 131.875999] snd_pcm_oss_ioctl+0xc2e/0x2e50 [ 131.880304] do_vfs_ioctl+0x7ae/0x1060 [ 131.884240] SyS_ioctl+0x8f/0xc0 [ 131.887598] do_syscall_64+0x1e8/0x640 [ 131.891470] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 131.896634] [ 131.898247] Freed by task 0: [ 131.901246] (stack is not available) [ 131.904937] [ 131.906554] The buggy address belongs to the object at ffff8880a1adfa80 [ 131.906554] which belongs to the cache kmalloc-64 of size 64 [ 131.919029] The buggy address is located 0 bytes to the right of [ 131.919029] 64-byte region [ffff8880a1adfa80, ffff8880a1adfac0) [ 131.931149] The buggy address belongs to the page: [ 131.936068] page:ffffea000286b7c0 count:1 mapcount:0 mapping:ffff8880a1adf000 index:0x0 [ 131.944210] flags: 0xfffe0000000100(slab) [ 131.948353] raw: 00fffe0000000100 ffff8880a1adf000 0000000000000000 0000000100000020 [ 131.956221] raw: ffffea000280aea0 ffffea00022e11e0 ffff8880aa800340 0000000000000000 [ 131.964083] page dumped because: kasan: bad access detected [ 131.969778] [ 131.971393] Memory state around the buggy address: [ 131.976315] ffff8880a1adf980: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc executing program executing program [ 131.983680] ffff8880a1adfa00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 131.991022] >ffff8880a1adfa80: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 131.998376] ^ [ 132.003804] ffff8880a1adfb00: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 132.011148] ffff8880a1adfb80: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 132.018498] ================================================================== [ 132.025850] Disabling lock debugging due to kernel taint executing program executing program [ 132.037769] Kernel panic - not syncing: panic_on_warn set ... [ 132.037769] [ 132.045145] CPU: 0 PID: 11073 Comm: syz-executor388 Tainted: G B 4.14.157-syzkaller #0 [ 132.054307] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 132.063651] Call Trace: [ 132.066219] dump_stack+0x142/0x197 [ 132.069919] ? linear_transfer+0x5db/0x840 [ 132.074137] panic+0x1f9/0x42d [ 132.077313] ? add_taint.cold+0x16/0x16 [ 132.081270] ? linear_transfer+0x5db/0x840 [ 132.085498] kasan_end_report+0x47/0x4f [ 132.089477] kasan_report.cold+0x130/0x2af [ 132.093693] check_memory_region+0x123/0x190 [ 132.098084] memcpy+0x24/0x50 [ 132.101169] linear_transfer+0x5db/0x840 [ 132.105489] ? snd_pcm_plugin_build_copy+0x350/0x350 [ 132.110584] ? snd_pcm_plug_slave_size+0x17d/0x2c0 [ 132.115503] snd_pcm_plug_read_transfer+0x158/0x260 [ 132.120505] ? snd_pcm_plug_write_transfer+0x340/0x340 [ 132.125766] snd_pcm_oss_read2+0x1c2/0x370 [ 132.129985] ? snd_pcm_oss_read3+0x370/0x370 executing program [ 132.134380] ? snd_pcm_oss_make_ready_locked+0x87/0x120 [ 132.139723] snd_pcm_oss_read+0x482/0x5d0 [ 132.143859] ? fsnotify+0x92f/0x11e0 [ 132.147570] __vfs_read+0x105/0x6a0 [ 132.151203] ? __fsnotify_update_child_dentry_flags.part.0+0x300/0x300 [ 132.157867] ? snd_pcm_oss_read2+0x370/0x370 [ 132.162365] ? vfs_copy_file_range+0xa40/0xa40 [ 132.166928] ? __inode_security_revalidate+0xd6/0x130 [ 132.172098] ? avc_policy_seqno+0x9/0x20 [ 132.176137] ? selinux_file_permission+0x85/0x480 [ 132.180960] ? security_file_permission+0x89/0x1f0 executing program [ 132.185908] ? rw_verify_area+0xea/0x2b0 [ 132.189955] vfs_read+0x137/0x350 [ 132.193398] SyS_read+0xfd/0x230 [ 132.196753] ? kernel_write+0x120/0x120 [ 132.200767] ? do_syscall_64+0x53/0x640 [ 132.204721] ? kernel_write+0x120/0x120 [ 132.208749] do_syscall_64+0x1e8/0x640 [ 132.212765] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 132.217590] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 132.222827] RIP: 0033:0x44a759 [ 132.226018] RSP: 002b:00007f52814f0da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 executing program executing program [ 132.233716] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 000000000044a759 [ 132.240988] RDX: 0000000000000313 RSI: 0000000020000380 RDI: 0000000000000004 [ 132.248250] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 132.255524] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 132.262790] R13: 0000000020000300 R14: 00000000004aea98 R15: 0000000000000000 [ 132.271346] Kernel Offset: disabled [ 132.275104] Rebooting in 86400 seconds..