[ 45.617372][ T26] audit: type=1800 audit(1556190065.160:30): pid=8047 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 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 syzkaller login: [ 50.865839][ T26] kauditd_printk_skb: 4 callbacks suppressed [ 50.865855][ T26] audit: type=1400 audit(1556190070.440:35): avc: denied { map } for pid=8222 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 '10.128.0.250' (ECDSA) to the list of known hosts. executing program [ 57.301393][ T26] audit: type=1400 audit(1556190076.880:36): avc: denied { map } for pid=8234 comm="syz-executor315" path="/root/syz-executor315838228" 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 [ 57.344447][ T8235] IPVS: ftp: loaded support on port[0] = 21 [ 57.430311][ T8236] WARNING: CPU: 1 PID: 8236 at fs/attr.c:234 notify_change+0xca2/0xfb0 [ 57.438613][ T8236] Kernel panic - not syncing: panic_on_warn set ... [ 57.445219][ T8236] CPU: 1 PID: 8236 Comm: syz-executor315 Not tainted 5.1.0-rc6+ #83 [ 57.453182][ T8236] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.463229][ T8236] Call Trace: [ 57.466514][ T8236] dump_stack+0x172/0x1f0 [ 57.470835][ T8236] ? notify_change+0xbc0/0xfb0 [ 57.475589][ T8236] panic+0x2cb/0x65c [ 57.479465][ T8236] ? __warn_printk+0xf3/0xf3 [ 57.484036][ T8236] ? notify_change+0xca2/0xfb0 [ 57.488775][ T8236] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 57.495026][ T8236] ? __warn.cold+0x5/0x45 [ 57.499353][ T8236] ? __warn+0xe8/0x1d0 [ 57.503577][ T8236] ? notify_change+0xca2/0xfb0 [ 57.508335][ T8236] __warn.cold+0x20/0x45 [ 57.512572][ T8236] ? notify_change+0xca2/0xfb0 [ 57.517318][ T8236] report_bug+0x263/0x2b0 [ 57.521630][ T8236] do_error_trap+0x11b/0x200 [ 57.526199][ T8236] do_invalid_op+0x37/0x50 [ 57.530595][ T8236] ? notify_change+0xca2/0xfb0 [ 57.535338][ T8236] invalid_op+0x14/0x20 [ 57.539476][ T8236] RIP: 0010:notify_change+0xca2/0xfb0 [ 57.544828][ T8236] Code: a4 53 0a 00 e8 2f 94 b7 ff 4c 8b 7c 24 20 4c 89 ff e8 22 5c 4a 01 89 de 4c 89 ff e8 08 78 4a 01 e9 33 fa ff ff e8 0e 94 b7 ff <0f> 0b e9 42 f4 ff ff e8 02 94 b7 ff 44 89 f3 4c 89 ea 48 b8 00 00 [ 57.564423][ T8236] RSP: 0018:ffff88808addf4c0 EFLAGS: 00010293 [ 57.570501][ T8236] RAX: ffff88808b1f2000 RBX: 0000000000004200 RCX: ffffffff81b8ed22 [ 57.578459][ T8236] RDX: 0000000000000000 RSI: ffffffff81b8f8e2 RDI: 0000000000000007 [ 57.586428][ T8236] RBP: ffff88808addf510 R08: ffff88808b1f2000 R09: ffffed10147b0cea [ 57.594392][ T8236] R10: ffffed10147b0ce9 R11: ffff8880a3d8674f R12: ffff88808addf560 [ 57.602355][ T8236] R13: ffff8880a3d86670 R14: 0000000000000000 R15: ffff88808addf5f0 [ 57.610341][ T8236] ? notify_change+0xe2/0xfb0 [ 57.615003][ T8236] ? notify_change+0xca2/0xfb0 [ 57.619755][ T8236] file_remove_privs+0x2a9/0x480 [ 57.624671][ T8236] ? dentry_needs_remove_privs.part.0+0x80/0x80 [ 57.630910][ T8236] ? __kernel_text_address+0xd/0x40 [ 57.636086][ T8236] ? unwind_get_return_address+0x61/0xa0 [ 57.641697][ T8236] ? __save_stack_trace+0x99/0x100 [ 57.646792][ T8236] __generic_file_write_iter+0x15e/0x630 [ 57.652410][ T8236] blkdev_write_iter+0x23a/0x440 [ 57.657331][ T8236] ? __blkdev_get+0x1660/0x1660 [ 57.662164][ T8236] ? 0xffffffff81000000 [ 57.666303][ T8236] ? __might_sleep+0x95/0x190 [ 57.671140][ T8236] do_iter_readv_writev+0x5e1/0x8e0 [ 57.676322][ T8236] ? vfs_dedupe_file_range+0x780/0x780 [ 57.681767][ T8236] ? rw_verify_area+0x118/0x360 [ 57.686599][ T8236] do_iter_write+0x184/0x610 [ 57.691182][ T8236] ? rcu_read_lock_sched_held+0x110/0x130 [ 57.696908][ T8236] ? __kmalloc+0x5d5/0x740 [ 57.701316][ T8236] vfs_iter_write+0x77/0xb0 [ 57.705816][ T8236] iter_file_splice_write+0x662/0xbe0 [ 57.711168][ T8236] ? atime_needs_update+0x5f0/0x5f0 [ 57.716349][ T8236] ? page_cache_pipe_buf_confirm+0x2b0/0x2b0 [ 57.722319][ T8236] ? rw_verify_area+0x118/0x360 [ 57.727154][ T8236] ? page_cache_pipe_buf_confirm+0x2b0/0x2b0 [ 57.733116][ T8236] direct_splice_actor+0x126/0x1a0 [ 57.738228][ T8236] splice_direct_to_actor+0x369/0x970 [ 57.743582][ T8236] ? generic_pipe_buf_nosteal+0x10/0x10 [ 57.749109][ T8236] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 57.755329][ T8236] ? do_splice_to+0x190/0x190 [ 57.760008][ T8236] ? rw_verify_area+0x118/0x360 [ 57.764856][ T8236] do_splice_direct+0x1da/0x2a0 [ 57.769689][ T8236] ? splice_direct_to_actor+0x970/0x970 [ 57.775215][ T8236] ? rw_verify_area+0x118/0x360 [ 57.780046][ T8236] do_sendfile+0x597/0xd00 [ 57.784445][ T8236] ? do_compat_pwritev64+0x1c0/0x1c0 [ 57.789713][ T8236] ? __x64_sys_futex+0x404/0x590 [ 57.794629][ T8236] __x64_sys_sendfile64+0x1dd/0x220 [ 57.799809][ T8236] ? __ia32_sys_sendfile+0x230/0x230 [ 57.805072][ T8236] ? do_syscall_64+0x26/0x610 [ 57.809726][ T8236] ? lockdep_hardirqs_on+0x418/0x5d0 [ 57.815014][ T8236] ? trace_hardirqs_on+0x67/0x230 [ 57.820026][ T8236] do_syscall_64+0x103/0x610 [ 57.824614][ T8236] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 57.830486][ T8236] RIP: 0033:0x44a289 [ 57.834362][ T8236] Code: e8 7c c1 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 ab d2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 57.854120][ T8236] RSP: 002b:00007f6dced4cce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 57.862517][ T8236] RAX: ffffffffffffffda RBX: 00000000006dcc48 RCX: 000000000044a289 [ 57.870467][ T8236] RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004 [ 57.878421][ T8236] RBP: 00000000006dcc40 R08: 0000000000000000 R09: 0000000000000000 [ 57.886402][ T8236] R10: 0020000102000007 R11: 0000000000000246 R12: 00000000006dcc4c [ 57.894377][ T8236] R13: 00007fff550e9eff R14: 00007f6dced4d9c0 R15: 000000000000002d [ 57.903237][ T8236] Kernel Offset: disabled [ 57.907638][ T8236] Rebooting in 86400 seconds..