Warning: Permanently added '10.128.0.208' (ECDSA) to the list of known hosts. [ 83.734039] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program [ 83.864598] audit: type=1400 audit(1584211336.293:36): avc: denied { map } for pid=7415 comm="syz-executor756" path="/root/syz-executor756566453" 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 84.406880] ================================================================== [ 84.414436] BUG: KASAN: slab-out-of-bounds in resample_shrink+0x55e/0x6a0 [ 84.421545] Read of size 2 at addr ffff8880a540ff00 by task syz-executor756/7483 [ 84.429103] [ 84.430717] CPU: 1 PID: 7483 Comm: syz-executor756 Not tainted 4.14.173-syzkaller #0 [ 84.438609] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 84.447990] Call Trace: [ 84.450565] dump_stack+0x13e/0x194 [ 84.454188] ? resample_shrink+0x55e/0x6a0 [ 84.458443] print_address_description.cold+0x7c/0x1e2 [ 84.463703] ? resample_shrink+0x55e/0x6a0 [ 84.467987] kasan_report.cold+0xa9/0x2ae [ 84.472241] resample_shrink+0x55e/0x6a0 [ 84.476302] rate_transfer+0x1b2/0x250 [ 84.480196] snd_pcm_plug_read_transfer+0x14f/0x250 [ 84.485210] ? snd_pcm_plug_write_transfer+0x320/0x320 [ 84.490651] snd_pcm_oss_read2+0x1ac/0x340 [ 84.494880] ? snd_pcm_oss_read3+0x360/0x360 [ 84.499282] snd_pcm_oss_read+0x486/0x5e0 [ 84.503801] ? rw_verify_area+0xe1/0x2a0 [ 84.507842] do_iter_read+0x3e3/0x5a0 [ 84.511647] ? save_trace+0x290/0x290 [ 84.515431] vfs_readv+0xd3/0x130 [ 84.518865] ? compat_rw_copy_check_uvector+0x320/0x320 [ 84.524227] ? __fget+0x201/0x360 [ 84.527697] ? lock_downgrade+0x6e0/0x6e0 [ 84.531833] ? __fget+0x228/0x360 [ 84.537123] ? __fget_light+0x199/0x1f0 [ 84.541083] do_readv+0xfc/0x2c0 [ 84.544451] ? vfs_readv+0x130/0x130 [ 84.548149] ? __do_page_fault+0x35b/0xb40 [ 84.552372] ? do_syscall_64+0x4c/0x640 [ 84.556389] ? do_preadv+0x200/0x200 [ 84.560107] do_syscall_64+0x1d5/0x640 [ 84.564027] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 84.569254] RIP: 0033:0x446c59 [ 84.572425] RSP: 002b:00007f2fcf884db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 [ 84.580132] RAX: ffffffffffffffda RBX: 00000000006dcc28 RCX: 0000000000446c59 [ 84.587390] RDX: 0000000000000001 RSI: 0000000020395000 RDI: 0000000000000003 [ 84.594672] RBP: 00000000006dcc20 R08: 0000000000000000 R09: 0000000000000000 [ 84.601934] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc2c [ 84.609312] R13: 00007fff729b479f R14: 00007f2fcf8859c0 R15: 20c49ba5e353f7cf [ 84.616575] [ 84.618186] Allocated by task 7483: [ 84.621798] save_stack+0x32/0xa0 [ 84.625230] kasan_kmalloc+0xbf/0xe0 [ 84.628920] __kmalloc_node+0x4c/0x70 [ 84.632793] kvmalloc_node+0x46/0xd0 [ 84.636497] snd_pcm_plugin_alloc+0x4cf/0x700 [ 84.640993] snd_pcm_plug_alloc+0x13e/0x300 [ 84.645310] snd_pcm_oss_change_params_locked+0x1c0d/0x30a0 [ 84.651000] snd_pcm_oss_change_params+0x5e/0xb0 [ 84.655737] snd_pcm_oss_get_active_substream+0xf5/0x140 [ 84.661284] snd_pcm_oss_ioctl+0xbe7/0x2b00 [ 84.665604] do_vfs_ioctl+0x75a/0xfe0 [ 84.669398] SyS_ioctl+0x7f/0xb0 [ 84.672745] do_syscall_64+0x1d5/0x640 [ 84.676624] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 84.681800] [ 84.683418] Freed by task 3716: [ 84.686702] save_stack+0x32/0xa0 [ 84.690162] kasan_slab_free+0x75/0xc0 [ 84.694041] kfree+0xcb/0x260 [ 84.697128] skb_free_head+0x83/0xa0 [ 84.700819] skb_release_data+0x528/0x7b0 [ 84.705039] skb_release_all+0x46/0x60 [ 84.709001] consume_skb+0xa7/0x330 [ 84.712709] skb_free_datagram+0x16/0xe0 [ 84.716768] unix_dgram_recvmsg+0x70a/0xcd0 [ 84.721080] sock_recvmsg+0xc0/0x100 [ 84.724788] SYSC_recvfrom+0x18c/0x290 [ 84.728673] do_syscall_64+0x1d5/0x640 [ 84.732542] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 84.737723] [ 84.739333] The buggy address belongs to the object at ffff8880a540fd00 [ 84.739333] which belongs to the cache kmalloc-512 of size 512 [ 84.752496] The buggy address is located 0 bytes to the right of [ 84.752496] 512-byte region [ffff8880a540fd00, ffff8880a540ff00) [ 84.764714] The buggy address belongs to the page: [ 84.769641] page:ffffea00029503c0 count:1 mapcount:0 mapping:ffff8880a540f080 index:0x0 [ 84.777765] flags: 0xfffe0000000100(slab) [ 84.781897] raw: 00fffe0000000100 ffff8880a540f080 0000000000000000 0000000100000006 [ 84.789757] raw: ffffea00029e12a0 ffffea0002245560 ffff88812fe56940 0000000000000000 [ 84.797631] page dumped because: kasan: bad access detected [ 84.803324] [ 84.804931] Memory state around the buggy address: [ 84.809868] ffff8880a540fe00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 84.817225] ffff8880a540fe80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 84.824585] >ffff8880a540ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 84.831943] ^ [ 84.835301] ffff8880a540ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 84.842663] ffff8880a5410000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 84.850111] ================================================================== executing program executing program executing program executing program [ 84.857473] Disabling lock debugging due to kernel taint [ 84.867250] Kernel panic - not syncing: panic_on_warn set ... [ 84.867250] [ 84.874633] CPU: 1 PID: 7483 Comm: syz-executor756 Tainted: G B 4.14.173-syzkaller #0 [ 84.883744] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 84.893189] Call Trace: [ 84.895818] dump_stack+0x13e/0x194 [ 84.899435] panic+0x1f9/0x42d [ 84.902746] ? add_taint.cold+0x16/0x16 [ 84.906716] ? preempt_schedule_common+0x4a/0xc0 [ 84.911461] ? resample_shrink+0x55e/0x6a0 [ 84.915697] ? ___preempt_schedule+0x16/0x18 [ 84.920120] ? resample_shrink+0x55e/0x6a0 [ 84.924630] kasan_end_report+0x43/0x49 [ 84.928641] kasan_report.cold+0x12f/0x2ae [ 84.932880] resample_shrink+0x55e/0x6a0 [ 84.936924] rate_transfer+0x1b2/0x250 [ 84.940801] snd_pcm_plug_read_transfer+0x14f/0x250 [ 84.945822] ? snd_pcm_plug_write_transfer+0x320/0x320 [ 84.951088] snd_pcm_oss_read2+0x1ac/0x340 [ 84.955306] ? snd_pcm_oss_read3+0x360/0x360 [ 84.959701] snd_pcm_oss_read+0x486/0x5e0 [ 84.963946] ? rw_verify_area+0xe1/0x2a0 [ 84.968029] do_iter_read+0x3e3/0x5a0 [ 84.971958] ? save_trace+0x290/0x290 [ 84.975791] vfs_readv+0xd3/0x130 [ 84.979235] ? compat_rw_copy_check_uvector+0x320/0x320 [ 84.984866] ? __fget+0x201/0x360 [ 84.988527] ? lock_downgrade+0x6e0/0x6e0 [ 84.992668] ? __fget+0x228/0x360 [ 84.996181] ? __fget_light+0x199/0x1f0 [ 85.000145] do_readv+0xfc/0x2c0 [ 85.003625] ? vfs_readv+0x130/0x130 executing program [ 85.007339] ? __do_page_fault+0x35b/0xb40 [ 85.011575] ? do_syscall_64+0x4c/0x640 [ 85.015572] ? do_preadv+0x200/0x200 [ 85.019302] do_syscall_64+0x1d5/0x640 [ 85.023183] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 85.028403] RIP: 0033:0x446c59 [ 85.031641] RSP: 002b:00007f2fcf884db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 [ 85.039441] RAX: ffffffffffffffda RBX: 00000000006dcc28 RCX: 0000000000446c59 [ 85.046698] RDX: 0000000000000001 RSI: 0000000020395000 RDI: 0000000000000003 [ 85.055705] RBP: 00000000006dcc20 R08: 0000000000000000 R09: 0000000000000000 [ 85.063012] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc2c [ 85.070268] R13: 00007fff729b479f R14: 00007f2fcf8859c0 R15: 20c49ba5e353f7cf [ 85.078787] Kernel Offset: disabled [ 85.082415] Rebooting in 86400 seconds..