Warning: Permanently added '10.128.0.87' (ECDSA) to the list of known hosts. [ 50.454342] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program [ 50.572406] kauditd_printk_skb: 10 callbacks suppressed [ 50.572414] audit: type=1400 audit(1575442980.246:36): avc: denied { map } for pid=6934 comm="syz-executor619" path="/root/syz-executor619135647" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 51.091906] ================================================================== [ 51.099436] BUG: KASAN: slab-out-of-bounds in linear_transfer+0x5db/0x840 [ 51.106354] Read of size 1 at addr ffff8880a5710c40 by task syz-executor619/7059 [ 51.113871] [ 51.115555] CPU: 1 PID: 7059 Comm: syz-executor619 Not tainted 4.14.157-syzkaller #0 [ 51.123421] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.132768] Call Trace: [ 51.135414] dump_stack+0x142/0x197 [ 51.139079] ? linear_transfer+0x5db/0x840 [ 51.143318] print_address_description.cold+0x7c/0x1dc [ 51.148833] ? linear_transfer+0x5db/0x840 [ 51.153061] kasan_report.cold+0xa9/0x2af [ 51.157289] check_memory_region+0x123/0x190 [ 51.161696] memcpy+0x24/0x50 [ 51.164800] linear_transfer+0x5db/0x840 [ 51.168852] ? snd_pcm_plugin_build_copy+0x350/0x350 [ 51.173948] ? snd_pcm_plug_slave_size+0x17d/0x2c0 [ 51.178924] snd_pcm_plug_read_transfer+0x158/0x260 [ 51.184035] ? snd_pcm_plug_write_transfer+0x340/0x340 executing program [ 51.189401] snd_pcm_oss_read2+0x1c2/0x370 [ 51.193628] ? snd_pcm_oss_read3+0x370/0x370 [ 51.198022] ? snd_pcm_oss_make_ready_locked+0x87/0x120 [ 51.203373] snd_pcm_oss_read+0x482/0x5d0 [ 51.207509] ? fsnotify+0x92f/0x11e0 [ 51.211231] __vfs_read+0x105/0x6a0 [ 51.214862] ? __fsnotify_update_child_dentry_flags.part.0+0x300/0x300 [ 51.221538] ? snd_pcm_oss_read2+0x370/0x370 [ 51.225945] ? vfs_copy_file_range+0xa40/0xa40 [ 51.230558] ? __inode_security_revalidate+0xd6/0x130 [ 51.235747] ? avc_policy_seqno+0x9/0x20 [ 51.239814] ? selinux_file_permission+0x85/0x480 [ 51.244647] ? security_file_permission+0x89/0x1f0 [ 51.249569] ? rw_verify_area+0xea/0x2b0 [ 51.253614] vfs_read+0x137/0x350 [ 51.257048] SyS_read+0xfd/0x230 [ 51.260416] ? kernel_write+0x120/0x120 [ 51.264390] ? do_syscall_64+0x53/0x640 [ 51.268346] ? kernel_write+0x120/0x120 [ 51.272307] do_syscall_64+0x1e8/0x640 [ 51.276186] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 51.281021] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 51.286193] RIP: 0033:0x4467c9 [ 51.289360] RSP: 002b:00007f57faab7db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 51.297051] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 00000000004467c9 [ 51.304302] RDX: 0000000000001000 RSI: 0000000020000380 RDI: 0000000000000003 [ 51.311660] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 51.318917] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 51.326170] R13: 00007ffcf2e751cf R14: 00007f57faab89c0 R15: 000000000000002d [ 51.333432] [ 51.335043] Allocated by task 7059: [ 51.338658] save_stack_trace+0x16/0x20 [ 51.342663] save_stack+0x45/0xd0 [ 51.346096] kasan_kmalloc+0xce/0xf0 [ 51.349795] __kmalloc_node+0x51/0x80 [ 51.353581] kvmalloc_node+0x4e/0xe0 [ 51.357276] snd_pcm_plugin_alloc+0x4da/0x740 [ 51.361753] snd_pcm_plug_alloc+0x13f/0x300 [ 51.366055] snd_pcm_oss_change_params_locked+0x1d6e/0x32f0 [ 51.371754] snd_pcm_oss_change_params+0x63/0xb0 [ 51.376493] snd_pcm_oss_get_active_substream+0x102/0x150 [ 51.382028] snd_pcm_oss_ioctl+0xc2e/0x2e50 [ 51.386346] do_vfs_ioctl+0x7ae/0x1060 [ 51.390266] SyS_ioctl+0x8f/0xc0 [ 51.393617] do_syscall_64+0x1e8/0x640 [ 51.397489] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 51.402660] [ 51.404296] Freed by task 3688: [ 51.407557] save_stack_trace+0x16/0x20 [ 51.411519] save_stack+0x45/0xd0 [ 51.414963] kasan_slab_free+0x75/0xc0 [ 51.418845] kfree+0xcc/0x270 [ 51.421934] security_context_to_sid_core+0x2b9/0x410 [ 51.427118] security_context_to_sid+0x31/0x40 [ 51.431679] selinux_inode_setxattr+0x328/0x6a0 [ 51.436335] security_inode_setxattr+0xf9/0x1c0 [ 51.441004] vfs_setxattr+0xa8/0xf0 [ 51.444624] setxattr+0x1de/0x350 [ 51.448063] path_setxattr+0x11f/0x140 [ 51.451996] SyS_lsetxattr+0x38/0x50 [ 51.455762] do_syscall_64+0x1e8/0x640 [ 51.459642] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 51.464817] [ 51.466439] The buggy address belongs to the object at ffff8880a5710c00 [ 51.466439] which belongs to the cache kmalloc-64 of size 64 [ 51.478953] The buggy address is located 0 bytes to the right of [ 51.478953] 64-byte region [ffff8880a5710c00, ffff8880a5710c40) [ 51.491138] The buggy address belongs to the page: [ 51.496058] page:ffffea000295c400 count:1 mapcount:0 mapping:ffff8880a5710000 index:0xffff8880a5710e00 [ 51.505487] flags: 0xfffe0000000100(slab) [ 51.509616] raw: 00fffe0000000100 ffff8880a5710000 ffff8880a5710e00 000000010000001e [ 51.517479] raw: ffffea0002468f20 ffff8880aa801338 ffff8880aa800340 0000000000000000 [ 51.525340] page dumped because: kasan: bad access detected [ 51.531032] [ 51.532652] Memory state around the buggy address: [ 51.537560] ffff8880a5710b00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 51.544908] ffff8880a5710b80: 00 00 00 00 00 00 00 06 fc fc fc fc fc fc fc fc [ 51.552252] >ffff8880a5710c00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 51.559603] ^ [ 51.565032] ffff8880a5710c80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 51.572372] ffff8880a5710d00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 51.579709] ================================================================== [ 51.587044] Disabling lock debugging due to kernel taint executing program executing program executing program executing program [ 51.594246] Kernel panic - not syncing: panic_on_warn set ... [ 51.594246] [ 51.601646] CPU: 1 PID: 7059 Comm: syz-executor619 Tainted: G B 4.14.157-syzkaller #0 [ 51.610734] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.620110] Call Trace: [ 51.622697] dump_stack+0x142/0x197 [ 51.626313] ? linear_transfer+0x5db/0x840 [ 51.630538] panic+0x1f9/0x42d [ 51.633718] ? add_taint.cold+0x16/0x16 [ 51.637685] ? ___preempt_schedule+0x16/0x18 executing program executing program executing program [ 51.642101] kasan_end_report+0x47/0x4f [ 51.646111] kasan_report.cold+0x130/0x2af [ 51.650331] check_memory_region+0x123/0x190 [ 51.654734] memcpy+0x24/0x50 [ 51.657830] linear_transfer+0x5db/0x840 [ 51.661881] ? snd_pcm_plugin_build_copy+0x350/0x350 [ 51.666975] ? snd_pcm_plug_slave_size+0x17d/0x2c0 [ 51.671904] snd_pcm_plug_read_transfer+0x158/0x260 [ 51.676904] ? snd_pcm_plug_write_transfer+0x340/0x340 [ 51.682178] snd_pcm_oss_read2+0x1c2/0x370 [ 51.686415] ? snd_pcm_oss_read3+0x370/0x370 executing program [ 51.690826] ? snd_pcm_oss_make_ready_locked+0x87/0x120 [ 51.696180] snd_pcm_oss_read+0x482/0x5d0 [ 51.700309] ? fsnotify+0x92f/0x11e0 [ 51.704005] __vfs_read+0x105/0x6a0 [ 51.707616] ? __fsnotify_update_child_dentry_flags.part.0+0x300/0x300 [ 51.714273] ? snd_pcm_oss_read2+0x370/0x370 [ 51.718666] ? vfs_copy_file_range+0xa40/0xa40 [ 51.723233] ? __inode_security_revalidate+0xd6/0x130 [ 51.728417] ? avc_policy_seqno+0x9/0x20 [ 51.732479] ? selinux_file_permission+0x85/0x480 [ 51.737308] ? security_file_permission+0x89/0x1f0 executing program executing program [ 51.742224] ? rw_verify_area+0xea/0x2b0 [ 51.746296] vfs_read+0x137/0x350 [ 51.749740] SyS_read+0xfd/0x230 [ 51.753096] ? kernel_write+0x120/0x120 [ 51.757057] ? do_syscall_64+0x53/0x640 [ 51.761029] ? kernel_write+0x120/0x120 [ 51.764993] do_syscall_64+0x1e8/0x640 [ 51.768874] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 51.773703] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 51.778892] RIP: 0033:0x4467c9 [ 51.782074] RSP: 002b:00007f57faab7db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 executing program executing program [ 51.789767] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 00000000004467c9 [ 51.797024] RDX: 0000000000001000 RSI: 0000000020000380 RDI: 0000000000000003 [ 51.804294] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 51.811548] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 51.818809] R13: 00007ffcf2e751cf R14: 00007f57faab89c0 R15: 000000000000002d [ 51.827429] Kernel Offset: disabled [ 51.831069] Rebooting in 86400 seconds..