[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon:[ 10.853638] random: sshd: uninitialized urandom read (32 bytes read) restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 11.583552] random: crng init done Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.5' (ECDSA) to the list of known hosts. syzkaller login: [ 45.133714] audit: type=1400 audit(1547044772.788:5): avc: denied { associate } for pid=2070 comm="syz-executor388" name="syz2" scontext=unconfined_u:object_r:unlabeled_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=filesystem 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 47.017024] kasan: CONFIG_KASAN_INLINE enabled [ 47.021820] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 47.029264] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 47.035485] Modules linked in: [ 47.038772] CPU: 0 PID: 4340 Comm: syz-executor388 Not tainted 4.9.141+ #1 [ 47.045757] task: ffff8801cce5af80 task.stack: ffff8801cb1b0000 [ 47.051798] RIP: 0010:[] [] ebitmap_destroy+0x32/0x100 [ 47.060428] RSP: 0018:ffff8801cb1b73e8 EFLAGS: 00010202 [ 47.065857] RAX: dffffc0000000000 RBX: ffff8801cbaa3240 RCX: ffffed00399cb705 [ 47.073106] RDX: 0000000000000001 RSI: ffffffff81a17f01 RDI: 0000000000000008 [ 47.080354] RBP: ffff8801cb1b7408 R08: ffff8801cce5b830 R09: 0000000000000000 [ 47.087602] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 47.094858] R13: 1ffff10039636e89 R14: 0000000000000008 R15: ffff8801cb1b74a8 [ 47.102108] FS: 00007faf93ad4700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000 [ 47.110310] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 47.116180] CR2: 00000000006dd0a0 CR3: 00000001cd368000 CR4: 00000000001606b0 [ 47.123435] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 47.130681] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 47.137927] Stack: [ 47.140055] ffff8801cbaa3240 0000000000000000 1ffff10039636e89 00000000ffffffea [ 47.148048] ffff8801cb1b7428 ffffffff81a20997 ffff8801cb1b7908 ffff8801cbaa3240 [ 47.156056] ffff8801cb1b74d0 ffffffff81a2124e ffff8801cbaf1ea0 0000000000000004 [ 47.164059] Call Trace: [ 47.166637] [] sens_destroy+0x47/0x90 [ 47.172065] [] sens_read+0x1de/0x360 [ 47.177408] [] ? cat_read+0x340/0x340 [ 47.182834] [] ? cat_read+0x340/0x340 [ 47.188262] [] policydb_read+0xdba/0x2390 [ 47.194038] [] ? string_to_av_perm+0x90/0x90 [ 47.200078] [] ? check_preemption_disabled+0x3b/0x200 [ 47.206896] [] ? kasan_unpoison_shadow+0x35/0x50 [ 47.213277] [] ? kasan_kmalloc+0xaf/0xc0 [ 47.218976] [] ? kmem_cache_alloc_trace+0x117/0x2e0 [ 47.225628] [] ? security_load_policy+0x137/0x9b0 [ 47.232097] [] security_load_policy+0x264/0x9b0 [ 47.238394] [] ? security_get_bools+0x690/0x690 [ 47.244696] [] ? rcu_read_lock_sched_held+0x103/0x120 [ 47.251533] [] ? __alloc_pages_nodemask+0x11df/0x1bd0 [ 47.258369] [] ? trace_hardirqs_on+0x10/0x10 [ 47.264408] [] ? gfp_pfmemalloc_allowed+0x110/0x110 [ 47.271068] [] ? vmap_page_range_noflush+0x512/0x770 [ 47.277801] [] ? alloc_vmap_area.isra.8+0x8d0/0x8d0 [ 47.284444] [] ? kasan_unpoison_shadow+0x35/0x50 [ 47.290826] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 47.297555] [] ? check_stack_object+0x110/0x150 [ 47.303850] [] ? __check_object_size+0x248/0x38e [ 47.310240] [] sel_write_load+0x19b/0xfa0 [ 47.316023] [] ? add_mm_counter_fast+0xc0/0xc0 [ 47.322242] [] ? sel_read_bool+0x240/0x240 [ 47.328109] [] ? trace_hardirqs_on+0x10/0x10 [ 47.334153] [] ? trace_hardirqs_on+0x10/0x10 [ 47.340198] [] __vfs_write+0x115/0x580 [ 47.345741] [] ? sel_read_bool+0x240/0x240 [ 47.351603] [] ? __vfs_read+0x560/0x560 [ 47.357215] [] ? check_preemption_disabled+0x3b/0x200 [ 47.364046] [] ? rcu_read_lock_sched_held+0x103/0x120 [ 47.370864] [] ? rcu_sync_lockdep_assert+0x73/0xb0 [ 47.377434] [] ? __sb_start_write+0x161/0x300 [ 47.383566] [] vfs_write+0x187/0x520 [ 47.388905] [] SyS_write+0xd9/0x1c0 [ 47.394156] [] ? SyS_read+0x1c0/0x1c0 [ 47.399585] [] ? do_syscall_64+0x48/0x550 [ 47.405358] [] ? SyS_read+0x1c0/0x1c0 [ 47.410782] [] do_syscall_64+0x19f/0x550 [ 47.416472] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 47.423368] Code: 89 fe 41 55 41 54 53 e8 6d 3b 90 ff 4d 85 f6 0f 84 a6 00 00 00 e8 5f 3b 90 ff 4c 89 f2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 a5 00 00 00 49 8b 1e 48 85 db 74 32 49 bd 00 [ 47.450452] RIP [] ebitmap_destroy+0x32/0x100 [ 47.456704] RSP [ 47.471828] ---[ end trace 6fa09ee25ed1a4e3 ]--- [ 47.476748] Kernel panic - not syncing: Fatal exception [ 47.482464] Kernel Offset: disabled [ 47.486081] Rebooting in 86400 seconds..