[ 69.755808][ T27] audit: type=1800 audit(1578542743.422:24): pid=9652 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="sudo" dev="sda1" ino=2454 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 70.491626][ T27] audit: type=1800 audit(1578542744.252:25): pid=9652 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 70.512883][ T27] audit: type=1800 audit(1578542744.252:26): pid=9652 uid=0 auid=4294967295 ses=4294967295 subj==unconfined 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 OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.232' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 80.861217][ T9804] IPVS: ftp: loaded support on port[0] = 21 executing program [ 80.910405][ T9806] netlink: 4 bytes leftover after parsing attributes in process `syz-executor183'. [ 80.924438][ T9807] netlink: 4 bytes leftover after parsing attributes in process `syz-executor183'. [ 80.946780][ T9809] netlink: 4 bytes leftover after parsing attributes in process `syz-executor183'. executing program executing program [ 80.962059][ T9810] netlink: 4 bytes leftover after parsing attributes in process `syz-executor183'. [ 80.982018][ T9812] netlink: 4 bytes leftover after parsing attributes in process `syz-executor183'. [ 80.996862][ T9813] netlink: 4 bytes leftover after parsing attributes in process `syz-executor183'. executing program [ 81.016989][ T9815] netlink: 4 bytes leftover after parsing attributes in process `syz-executor183'. [ 81.031544][ T9816] netlink: 4 bytes leftover after parsing attributes in process `syz-executor183'. [ 81.052101][ T9818] netlink: 4 bytes leftover after parsing attributes in process `syz-executor183'. executing program [ 81.065055][ T9818] bridge0: port 1(syz_tun) entered blocking state [ 81.072724][ T9818] bridge0: port 1(syz_tun) entered disabled state [ 81.080388][ T9818] device syz_tun entered promiscuous mode [ 81.092759][ T9819] netlink: 4 bytes leftover after parsing attributes in process `syz-executor183'. [ 81.115772][ T9821] device syz_tun left promiscuous mode [ 81.122231][ T9821] bridge0: port 1(syz_tun) entered disabled state executing program [ 81.258857][ T9821] bridge1: port 1(syz_tun) entered blocking state [ 81.265330][ T9821] bridge1: port 1(syz_tun) entered disabled state [ 81.273001][ T9821] device syz_tun entered promiscuous mode [ 81.294085][ T9826] device syz_tun left promiscuous mode [ 81.300382][ T9826] bridge1: port 1(syz_tun) entered disabled state [ 81.455558][ T9827] ------------[ cut here ]------------ [ 81.458849][ T9826] bridge2: port 1(syz_tun) entered blocking state [ 81.461344][ T9827] DEBUG_LOCKS_WARN_ON(1) [ 81.461441][ T9827] WARNING: CPU: 1 PID: 9827 at kernel/locking/lockdep.c:167 mark_lock+0x22b/0x1220 [ 81.468047][ T9826] bridge2: port 1(syz_tun) entered disabled state [ 81.472366][ T9827] Kernel panic - not syncing: panic_on_warn set ... [ 81.472380][ T9827] CPU: 1 PID: 9827 Comm: syz-executor183 Not tainted 5.5.0-rc5-syzkaller #0 [ 81.472386][ T9827] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 81.472390][ T9827] Call Trace: [ 81.472406][ T9827] dump_stack+0x197/0x210 [ 81.472419][ T9827] ? mark_lock+0x160/0x1220 [ 81.472431][ T9827] panic+0x2e3/0x75c [ 81.472441][ T9827] ? add_taint.cold+0x16/0x16 [ 81.472461][ T9827] ? __kasan_check_write+0x14/0x20 [ 81.482396][ T9826] kobject: 'brport' (000000005dbefd14): kobject_add_internal: parent: 'syz_tun', set: '' [ 81.488113][ T9827] ? __warn.cold+0x14/0x3e [ 81.488131][ T9827] ? __warn+0xd9/0x1cf [ 81.495490][ T9826] device syz_tun entered promiscuous mode [ 81.503363][ T9827] ? mark_lock+0x22b/0x1220 [ 81.503376][ T9827] __warn.cold+0x2f/0x3e [ 81.503390][ T9827] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 81.503401][ T9827] ? mark_lock+0x22b/0x1220 [ 81.503412][ T9827] report_bug+0x289/0x300 [ 81.503430][ T9827] do_error_trap+0x11b/0x200 [ 81.514524][ T9826] kobject: 'brport' (000000005dbefd14): kobject_uevent_env [ 81.516763][ T9827] do_invalid_op+0x37/0x50 [ 81.516774][ T9827] ? mark_lock+0x22b/0x1220 [ 81.516792][ T9827] invalid_op+0x23/0x30 [ 81.521293][ T9826] kobject: 'brport' (000000005dbefd14): kobject_uevent_env: filter function caused the event to drop! [ 81.525590][ T9827] RIP: 0010:mark_lock+0x22b/0x1220 [ 81.525602][ T9827] Code: d0 7c 08 84 d2 0f 85 a8 0e 00 00 44 8b 1d 3d 21 21 09 45 85 db 75 b6 48 c7 c6 20 95 2b 88 48 c7 c7 60 95 2b 88 e8 94 3e eb ff <0f> 0b 31 db e9 aa fe ff ff 48 c7 c7 20 35 66 8b e8 20 49 58 00 e9 [ 81.525614][ T9827] RSP: 0018:ffffc90001e771c8 EFLAGS: 00010082 [ 81.656022][ T9827] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 81.663982][ T9827] RDX: 0000000000000000 RSI: ffffffff815e8506 RDI: fffff520003cee2b [ 81.671940][ T9827] RBP: ffffc90001e77218 R08: ffff88809e3fe500 R09: fffffbfff1333511 [ 81.679902][ T9827] R10: fffffbfff1333510 R11: ffffffff8999a883 R12: 0000000000000002 [ 81.688216][ T9827] R13: ffff88809e3fede8 R14: 0000000000000000 R15: 000000000004057b [ 81.696615][ T9827] ? vprintk_func+0x86/0x189 [ 81.701219][ T9827] ? mark_lock+0x22b/0x1220 [ 81.705709][ T9827] __lock_acquire+0x1370/0x4a00 [ 81.711517][ T9827] ? pointer+0x740/0x740 [ 81.715956][ T9827] ? __kasan_check_read+0x11/0x20 [ 81.721340][ T9827] ? __lock_acquire+0x8a0/0x4a00 [ 81.726425][ T9827] ? __kasan_check_read+0x11/0x20 [ 81.732294][ T9827] ? mark_held_locks+0xf0/0xf0 [ 81.737355][ T9827] ? mark_held_locks+0xa4/0xf0 [ 81.742104][ T9827] lock_acquire+0x190/0x410 [ 81.746595][ T9827] ? dev_mc_seq_show+0x3e/0x240 [ 81.751432][ T9827] _raw_spin_lock_bh+0x33/0x50 [ 81.756177][ T9827] ? dev_mc_seq_show+0x3e/0x240 [ 81.761021][ T9827] dev_mc_seq_show+0x3e/0x240 [ 81.766029][ T9827] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 81.772336][ T9827] ? dev_seq_next+0x1c1/0x220 [ 81.777005][ T9827] seq_read+0xad7/0x1170 [ 81.781925][ T9827] ? seq_open_private+0x50/0x50 [ 81.787105][ T9827] proc_reg_read+0x1fc/0x2c0 [ 81.791676][ T9827] ? proc_reg_compat_ioctl+0x2a0/0x2a0 [ 81.797129][ T9827] ? rw_verify_area+0x126/0x360 [ 81.801980][ T9827] do_iter_read+0x4a4/0x660 [ 81.806463][ T9827] ? dup_iter+0x260/0x260 [ 81.810780][ T9827] vfs_readv+0xf0/0x160 [ 81.815424][ T9827] ? compat_rw_copy_check_uvector+0x4c0/0x4c0 [ 81.822169][ T9827] ? push_pipe+0x3e2/0x6a0 [ 81.826670][ T9827] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 81.832907][ T9827] ? iov_iter_get_pages_alloc+0x3a5/0x15b0 [ 81.840189][ T9827] ? iov_iter_for_each_range+0x7d0/0x7d0 [ 81.845842][ T9827] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 81.852092][ T9827] default_file_splice_read+0x4fb/0xa20 [ 81.857898][ T9827] ? kasan_kmalloc+0x9/0x10 [ 81.862397][ T9827] ? __kmalloc+0x163/0x770 [ 81.866908][ T9827] ? splice_direct_to_actor+0x80e/0xa30 [ 81.872449][ T9827] ? iter_file_splice_write+0xc10/0xc10 [ 81.878000][ T9827] ? __lock_acquire+0x16f2/0x4a00 [ 81.883011][ T9827] ? __lock_acquire+0x16f2/0x4a00 [ 81.888112][ T9827] ? cache_grow_end+0xa4/0x190 [ 81.892857][ T9827] ? find_held_lock+0x35/0x130 [ 81.897611][ T9827] ? cache_grow_end+0xa4/0x190 [ 81.902378][ T9827] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 81.908610][ T9827] ? fsnotify+0x7fd/0xbb0 [ 81.912933][ T9827] ? security_file_permission+0x8f/0x380 [ 81.918636][ T9827] ? rw_verify_area+0x126/0x360 [ 81.923483][ T9827] ? iter_file_splice_write+0xc10/0xc10 [ 81.929004][ T9827] do_splice_to+0x127/0x180 [ 81.933495][ T9827] splice_direct_to_actor+0x320/0xa30 [ 81.938852][ T9827] ? generic_pipe_buf_nosteal+0x10/0x10 [ 81.944391][ T9827] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 81.950712][ T9827] ? do_splice_to+0x180/0x180 [ 81.955385][ T9827] ? rw_verify_area+0x126/0x360 [ 81.960217][ T9827] do_splice_direct+0x1da/0x2a0 [ 81.965136][ T9827] ? splice_direct_to_actor+0xa30/0xa30 [ 81.970679][ T9827] ? rw_verify_area+0x126/0x360 [ 81.975527][ T9827] do_sendfile+0x597/0xd00 [ 81.979963][ T9827] ? do_compat_pwritev64+0x1c0/0x1c0 [ 81.985242][ T9827] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 81.991508][ T9827] ? __x64_sys_futex+0x404/0x590 [ 81.996612][ T9827] __x64_sys_sendfile64+0x1dd/0x220 [ 82.002065][ T9827] ? __ia32_sys_sendfile+0x230/0x230 [ 82.007345][ T9827] ? do_syscall_64+0x26/0x790 [ 82.012157][ T9827] ? lockdep_hardirqs_on+0x421/0x5e0 [ 82.017840][ T9827] ? trace_hardirqs_on+0x67/0x240 [ 82.022914][ T9827] do_syscall_64+0xfa/0x790 [ 82.027622][ T9827] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 82.033626][ T9827] RIP: 0033:0x447739 [ 82.037510][ T9827] Code: e8 ec 0e 03 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 fb 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 82.057231][ T9827] RSP: 002b:00007f7623bb7cf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 82.065750][ T9827] RAX: ffffffffffffffda RBX: 00000000006dcc98 RCX: 0000000000447739 [ 82.074439][ T9827] RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000005 [ 82.082532][ T9827] RBP: 00000000006dcc90 R08: 0000000000000000 R09: 0000000000000000 [ 82.090981][ T9827] R10: 000000006f0a77bd R11: 0000000000000246 R12: 00000000006dcc9c [ 82.098947][ T9827] R13: 00007f7623bb7d10 R14: 00007f7623bb7d10 R15: a7ffffffffffffde [ 82.108343][ T9827] Kernel Offset: disabled [ 82.112945][ T9827] Rebooting in 86400 seconds..