[ 44.326643][ T23] audit: type=1800 audit(1555112138.327:30): pid=8040 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 48.574248][ T23] kauditd_printk_skb: 4 callbacks suppressed [ 48.574265][ T23] audit: type=1400 audit(1555112142.607:35): avc: denied { map } for pid=8214 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 '10.128.0.251' (ECDSA) to the list of known hosts. executing program [ 55.074664][ T23] audit: type=1400 audit(1555112149.107:36): avc: denied { map } for pid=8226 comm="syz-executor094" path="/root/syz-executor094056960" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 55.077728][ T8226] WARNING: CPU: 0 PID: 8226 at include/linux/cpumask.h:121 io_uring_setup+0x13b2/0x1990 [ 55.111358][ T8226] Kernel panic - not syncing: panic_on_warn set ... [ 55.117960][ T8226] CPU: 0 PID: 8226 Comm: syz-executor094 Not tainted 5.1.0-rc4+ #65 [ 55.125942][ T8226] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.136080][ T8226] Call Trace: [ 55.139746][ T8226] dump_stack+0x172/0x1f0 [ 55.144168][ T8226] ? io_uring_setup+0x12e0/0x1990 [ 55.149286][ T8226] panic+0x2cb/0x65c [ 55.153212][ T8226] ? __warn_printk+0xf3/0xf3 [ 55.157816][ T8226] ? io_uring_setup+0x13b2/0x1990 [ 55.162828][ T8226] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.169072][ T8226] ? __warn.cold+0x5/0x45 [ 55.173410][ T8226] ? __warn+0xe8/0x1d0 [ 55.177500][ T8226] ? io_uring_setup+0x13b2/0x1990 [ 55.182520][ T8226] __warn.cold+0x20/0x45 [ 55.186746][ T8226] ? io_uring_setup+0x13b2/0x1990 [ 55.191759][ T8226] report_bug+0x263/0x2b0 [ 55.196077][ T8226] do_error_trap+0x11b/0x200 [ 55.200656][ T8226] do_invalid_op+0x37/0x50 [ 55.205053][ T8226] ? io_uring_setup+0x13b2/0x1990 [ 55.210069][ T8226] invalid_op+0x14/0x20 [ 55.214219][ T8226] RIP: 0010:io_uring_setup+0x13b2/0x1990 [ 55.219838][ T8226] Code: 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 80 3c 02 00 0f 84 18 fe ff ff 48 89 df e8 e8 80 e0 ff e9 0b fe ff ff e8 2e 79 a8 ff <0f> 0b e9 db f8 ff ff e8 22 79 a8 ff 49 8d 9c 24 88 00 00 00 48 b8 [ 55.239471][ T8226] RSP: 0018:ffff888094307dc0 EFLAGS: 00010293 [ 55.245547][ T8226] RAX: ffff888095be6280 RBX: 0000000000000400 RCX: ffffffff81c80eab [ 55.253532][ T8226] RDX: 0000000000000000 RSI: ffffffff81c815d2 RDI: 0000000000000005 [ 55.261657][ T8226] RBP: ffff888094307ef0 R08: ffff888095be6280 R09: ffffed10129271cc [ 55.269629][ T8226] R10: ffffed10129271cb R11: ffff888094938e5f R12: ffff888085072a40 [ 55.277670][ T8226] R13: ffff888094307ec8 R14: ffff888085072a80 R15: ffff888085072a94 [ 55.285660][ T8226] ? io_uring_setup+0xc8b/0x1990 [ 55.290597][ T8226] ? io_uring_setup+0x13b2/0x1990 [ 55.295610][ T8226] ? io_uring_release+0x50/0x50 [ 55.300472][ T8226] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 55.305923][ T8226] ? do_syscall_64+0x26/0x610 [ 55.310590][ T8226] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 55.316647][ T8226] ? do_syscall_64+0x26/0x610 [ 55.321321][ T8226] ? lockdep_hardirqs_on+0x418/0x5d0 [ 55.326592][ T8226] __x64_sys_io_uring_setup+0x54/0x80 [ 55.331948][ T8226] do_syscall_64+0x103/0x610 [ 55.336552][ T8226] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 55.342455][ T8226] RIP: 0033:0x440239 [ 55.346357][ T8226] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 55.366914][ T8226] RSP: 002b:00007ffcc430ad88 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 [ 55.375325][ T8226] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440239 [ 55.383290][ T8226] RDX: 0000000000400b60 RSI: 0000000020000200 RDI: 0000000000000c9f [ 55.391347][ T8226] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 55.399309][ T8226] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401ac0 [ 55.407279][ T8226] R13: 0000000000401b50 R14: 0000000000000000 R15: 0000000000000000 [ 55.416213][ T8226] Kernel Offset: disabled [ 55.420609][ T8226] Rebooting in 86400 seconds..