[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 27.401347] kauditd_printk_skb: 7 callbacks suppressed [ 27.401358] audit: type=1800 audit(1537929487.668:29): pid=5242 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 27.427261] audit: type=1800 audit(1537929487.668:30): pid=5242 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.87' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 38.429254] WARNING: CPU: 0 PID: 5514 at fs/attr.c:234 notify_change+0xda8/0x1110 [ 38.436923] Kernel panic - not syncing: panic_on_warn set ... [ 38.436923] [ 38.444288] CPU: 0 PID: 5514 Comm: syz-executor543 Not tainted 4.19.0-rc5+ #31 [ 38.451656] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.461037] Call Trace: [ 38.463643] dump_stack+0x1c4/0x2b4 [ 38.467332] ? dump_stack_print_info.cold.2+0x52/0x52 [ 38.472548] panic+0x238/0x4e7 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 38.475755] ? add_taint.cold.5+0x16/0x16 [ 38.479928] ? __warn.cold.8+0x148/0x1ba [ 38.484004] ? __warn.cold.8+0x117/0x1ba [ 38.488094] ? notify_change+0xda8/0x1110 [ 38.492261] __warn.cold.8+0x163/0x1ba [ 38.496161] ? rcu_bh_qs+0xc0/0xc0 [ 38.499725] ? notify_change+0xda8/0x1110 [ 38.503893] report_bug+0x254/0x2d0 [ 38.507545] do_error_trap+0x1fc/0x4d0 [ 38.511450] ? simple_xattr_get+0x106/0x180 [ 38.515793] ? math_error+0x3f0/0x3f0 [ 38.519615] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.524487] ? trace_hardirqs_on_caller+0x310/0x310 [ 38.529527] ? kasan_check_read+0x11/0x20 [ 38.533717] ? do_raw_spin_unlock+0xa7/0x2f0 [ 38.538148] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 38.542754] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.547627] do_invalid_op+0x1b/0x20 [ 38.551379] invalid_op+0x14/0x20 [ 38.554856] RIP: 0010:notify_change+0xda8/0x1110 [ 38.559628] Code: 4c 89 ef e8 fa 39 0c 00 e8 f5 01 a8 ff 4c 89 f7 e8 ad fa 81 01 44 89 e6 4c 89 f7 e8 e2 19 82 01 e9 ea f9 ff ff e8 d8 01 a8 ff <0f> 0b e9 c3 f3 ff ff e8 cc 01 a8 ff 48 89 da 41 83 cf 01 48 b8 00 [ 38.578559] RSP: 0018:ffff8801d751f3e0 EFLAGS: 00010293 [ 38.583945] RAX: ffff8801b986e240 RBX: ffff8801d1829100 RCX: ffffffff81d6d604 [ 38.591226] RDX: 0000000000000000 RSI: ffffffff81d6e248 RDI: 0000000000000007 [ 38.598514] RBP: ffff8801d751f4b0 R08: ffff8801b986e240 R09: ffffed003a30523b [ 38.605801] R10: ffffed003a30523b R11: ffff8801d18291df R12: 0000000000004200 [ 38.613082] R13: ffff8801d751f4f0 R14: ffff8801d44aae00 R15: 1ffff1003aea3e88 [ 38.620389] ? notify_change+0x164/0x1110 [ 38.624563] ? notify_change+0xda8/0x1110 [ 38.628747] ? rcu_process_callbacks+0x1d10/0x2670 [ 38.633715] ? setattr_prepare+0x830/0x830 [ 38.637978] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.644057] ? security_inode_need_killpriv+0x80/0xa0 [ 38.649273] file_remove_privs+0x2d5/0x540 [ 38.653536] ? unwind_get_return_address+0x61/0xa0 [ 38.658483] ? dentry_needs_remove_privs.part.25+0x70/0x70 [ 38.664126] ? blk_lld_busy+0x70/0x70 [ 38.667966] __generic_file_write_iter+0x169/0x630 [ 38.672918] ? kasan_kmalloc+0xc7/0xe0 [ 38.676823] ? __kmalloc+0x14e/0x760 [ 38.680560] blkdev_write_iter+0x23d/0x450 [ 38.684814] ? blkdev_close+0xb0/0xb0 [ 38.688653] do_iter_readv_writev+0x8b0/0xa80 [ 38.693191] ? vfs_dedupe_file_range+0x670/0x670 [ 38.697972] ? rw_verify_area+0x118/0x360 [ 38.702151] do_iter_write+0x185/0x5f0 [ 38.706062] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.711627] vfs_iter_write+0x77/0xb0 [ 38.715498] iter_file_splice_write+0x90d/0x1050 [ 38.720287] ? page_cache_pipe_buf_steal+0x860/0x860 [ 38.725428] ? rw_verify_area+0x118/0x360 [ 38.729596] ? page_cache_pipe_buf_steal+0x860/0x860 [ 38.734728] direct_splice_actor+0x128/0x190 [ 38.739157] splice_direct_to_actor+0x318/0x8f0 [ 38.743855] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.749732] ? pipe_to_sendpage+0x400/0x400 [ 38.754091] ? do_splice_to+0x190/0x190 [ 38.758093] ? security_file_permission+0x1c2/0x230 [ 38.763142] ? rw_verify_area+0x118/0x360 [ 38.767317] do_splice_direct+0x2d4/0x420 [ 38.771492] ? splice_direct_to_actor+0x8f0/0x8f0 [ 38.776363] ? rw_verify_area+0x118/0x360 [ 38.780534] do_sendfile+0x62a/0xe20 [ 38.784277] ? do_compat_pwritev64+0x1c0/0x1c0 [ 38.788883] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 38.794433] ? _copy_from_user+0xdf/0x150 [ 38.798600] __x64_sys_sendfile64+0x15d/0x250 [ 38.803110] ? __ia32_sys_sendfile+0x2a0/0x2a0 [ 38.807722] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.813274] ? ksys_ioctl+0x81/0xd0 [ 38.816922] do_syscall_64+0x1b9/0x820 [ 38.820830] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 38.826212] ? syscall_return_slowpath+0x5e0/0x5e0 [ 38.831160] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.836025] ? trace_hardirqs_on_caller+0x310/0x310 [ 38.841073] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 38.846113] ? prepare_exit_to_usermode+0x291/0x3b0 [ 38.851189] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.856076] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 38.861280] RIP: 0033:0x444ca9 [ 38.864507] Code: e8 ac e8 ff ff 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 2b ce fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 38.883422] RSP: 002b:00007fff835de0c8 EFLAGS: 00000286 ORIG_RAX: 0000000000000028 [ 38.891149] RAX: ffffffffffffffda RBX: 0000000020000040 RCX: 0000000000444ca9 [ 38.898432] RDX: 0000000020000000 RSI: 0000000000000003 RDI: 0000000000000003 [ 38.905721] RBP: 0000000000000000 R08: 00000000004002e0 R09: 00000000004002e0 [ 38.913010] R10: 0000000002000005 R11: 0000000000000286 R12: 000000000000959a [ 38.920297] R13: 0000000000401ff0 R14: 0000000000000000 R15: 0000000000000000 [ 38.928779] Kernel Offset: disabled [ 38.932479] Rebooting in 86400 seconds..