[ 43.514237] audit: type=1800 audit(1560545653.768:29): pid=7788 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0 [ 43.552699] audit: type=1800 audit(1560545653.768:30): pid=7788 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=2490 res=0 Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.166' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 53.981784] kauditd_printk_skb: 5 callbacks suppressed [ 53.981803] audit: type=1400 audit(1560545664.238:36): avc: denied { map } for pid=7975 comm="syz-executor307" path="/root/syz-executor307011162" 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 61.006791] WARNING: CPU: 0 PID: 8625 at fs/attr.c:234 notify_change+0xca0/0xfb0 [ 61.015776] Kernel panic - not syncing: panic_on_warn set ... [ 61.015776] [ 61.023435] CPU: 0 PID: 8625 Comm: syz-executor307 Not tainted 4.19.50 #22 [ 61.030695] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.041081] Call Trace: [ 61.044141] dump_stack+0x172/0x1f0 [ 61.048004] panic+0x263/0x507 [ 61.051369] ? __warn_printk+0xf3/0xf3 [ 61.055512] ? notify_change+0xca0/0xfb0 [ 61.059968] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 61.065663] ? __warn.cold+0x5/0x4a [ 61.069727] ? __warn+0xe8/0x1d0 [ 61.073178] ? notify_change+0xca0/0xfb0 [ 61.077387] __warn.cold+0x20/0x4a [ 61.081197] ? notify_change+0xca0/0xfb0 [ 61.085623] report_bug+0x263/0x2b0 [ 61.089975] do_error_trap+0x204/0x360 [ 61.094057] ? math_error+0x340/0x340 [ 61.098397] ? kasan_check_read+0x11/0x20 [ 61.102741] ? do_raw_spin_unlock+0x57/0x270 [ 61.107548] ? error_entry+0x76/0xd0 [ 61.111665] ? trace_hardirqs_off_caller+0x65/0x220 [ 61.117252] ? simple_xattr_get+0x109/0x180 [ 61.122097] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 61.127571] do_invalid_op+0x1b/0x20 [ 61.131483] invalid_op+0x14/0x20 [ 61.135099] RIP: 0010:notify_change+0xca0/0xfb0 [ 61.139905] Code: f6 e6 09 00 e8 91 55 b9 ff 4c 8b 7c 24 20 4c 89 ff e8 04 f7 42 01 89 de 4c 89 ff e8 ea 12 43 01 e9 35 fa ff ff e8 70 55 b9 ff <0f> 0b e9 44 f4 ff ff e8 64 55 b9 ff 44 89 f3 4c 89 ea 48 b8 00 00 [ 61.159731] RSP: 0018:ffff8880971274d0 EFLAGS: 00010293 [ 61.165521] RAX: ffff8880884e6000 RBX: 0000000000004200 RCX: ffffffff81b1a5b2 [ 61.173486] RDX: 0000000000000000 RSI: ffffffff81b1b170 RDI: 0000000000000007 [ 61.181777] RBP: ffff888097127520 R08: ffff8880884e6000 R09: ffffed10148e198e [ 61.189551] R10: ffffed10148e198d R11: ffff8880a470cc6f R12: ffff888097127570 [ 61.197527] R13: ffff8880a470cb90 R14: 0000000000000000 R15: ffff888097127600 [ 61.205974] ? notify_change+0xe2/0xfb0 [ 61.210940] ? notify_change+0xca0/0xfb0 [ 61.215377] file_remove_privs+0x2a9/0x480 [ 61.220034] ? dentry_needs_remove_privs.part.0+0x80/0x80 [ 61.227137] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 61.233233] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 61.239735] ? lockdep_hardirqs_on+0x415/0x5d0 [ 61.245662] ? trace_hardirqs_on+0x67/0x220 [ 61.250660] ? kasan_check_read+0x11/0x20 [ 61.255370] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 61.260934] __generic_file_write_iter+0x15e/0x630 [ 61.266511] blkdev_write_iter+0x233/0x440 [ 61.271584] ? __blkdev_get+0x1660/0x1660 [ 61.276785] ? ___might_sleep+0x163/0x280 [ 61.281761] do_iter_readv_writev+0x558/0x830 [ 61.286265] ? vfs_dedupe_file_range+0x6f0/0x6f0 [ 61.291032] ? security_file_permission+0x89/0x230 [ 61.296081] ? rw_verify_area+0x118/0x360 [ 61.300267] do_iter_write+0x184/0x5f0 [ 61.304759] ? rcu_read_lock_sched_held+0x110/0x130 [ 61.309779] ? __kmalloc+0x5e1/0x750 [ 61.313618] vfs_iter_write+0x77/0xb0 [ 61.317585] iter_file_splice_write+0x661/0xbd0 [ 61.322267] ? atime_needs_update+0x5f0/0x5f0 [ 61.327026] ? page_cache_pipe_buf_confirm+0x2b0/0x2b0 [ 61.332502] ? security_file_permission+0x89/0x230 [ 61.337649] ? rw_verify_area+0x118/0x360 [ 61.342245] ? page_cache_pipe_buf_confirm+0x2b0/0x2b0 [ 61.347675] direct_splice_actor+0x123/0x190 [ 61.352124] splice_direct_to_actor+0x2e7/0x890 [ 61.357162] ? generic_pipe_buf_nosteal+0x10/0x10 [ 61.362438] ? do_splice_to+0x180/0x180 [ 61.366418] ? do_splice_direct+0x1b9/0x2a0 [ 61.370879] ? generic_pipe_buf_nosteal+0x10/0x10 [ 61.376024] do_splice_direct+0x1da/0x2a0 [ 61.380532] ? splice_direct_to_actor+0x890/0x890 [ 61.385610] ? security_file_permission+0x89/0x230 [ 61.391949] ? rw_verify_area+0x118/0x360 [ 61.396384] do_sendfile+0x597/0xce0 [ 61.400115] ? do_compat_pwritev64+0x1c0/0x1c0 [ 61.404939] ? __x64_sys_futex+0x40d/0x590 [ 61.409561] __x64_sys_sendfile64+0x1dd/0x220 [ 61.414323] ? __ia32_sys_sendfile+0x230/0x230 [ 61.418909] ? do_syscall_64+0x26/0x620 [ 61.423051] ? lockdep_hardirqs_on+0x415/0x5d0 [ 61.427913] ? trace_hardirqs_on+0x67/0x220 [ 61.432548] do_syscall_64+0xfd/0x620 [ 61.436568] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 61.442307] RIP: 0033:0x44abe9 [ 61.445682] Code: 4d cb fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 1b cb fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 61.465815] RSP: 002b:00007f2d5bc2bce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 61.474213] RAX: ffffffffffffffda RBX: 00000000006dcc28 RCX: 000000000044abe9 [ 61.482859] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004 [ 61.490820] RBP: 00000000006dcc20 R08: 0000000000000000 R09: 0000000000000000 [ 61.498613] R10: 0000000024000000 R11: 0000000000000246 R12: 00000000006dcc2c [ 61.506092] R13: 00007fff65584ebf R14: 00007f2d5bc2c9c0 R15: 0000000000000000 [ 61.515684] Kernel Offset: disabled [ 61.519720] Rebooting in 86400 seconds..