[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 69.950253][ T27] audit: type=1800 audit(1578570233.180:25): pid=9528 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 69.970025][ T27] audit: type=1800 audit(1578570233.180:26): pid=9528 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 69.992685][ T27] audit: type=1800 audit(1578570233.180:27): pid=9528 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 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 '10.128.1.0' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 82.364971][ T9682] IPVS: ftp: loaded support on port[0] = 21 executing program [ 82.411585][ T9684] netlink: 4 bytes leftover after parsing attributes in process `syz-executor087'. [ 82.425690][ T9684] netlink: 4 bytes leftover after parsing attributes in process `syz-executor087'. [ 82.444955][ T9687] netlink: 4 bytes leftover after parsing attributes in process `syz-executor087'. executing program executing program [ 82.458992][ T9687] netlink: 4 bytes leftover after parsing attributes in process `syz-executor087'. [ 82.477548][ T9690] netlink: 4 bytes leftover after parsing attributes in process `syz-executor087'. [ 82.490999][ T9690] netlink: 4 bytes leftover after parsing attributes in process `syz-executor087'. executing program [ 82.510247][ T9694] netlink: 4 bytes leftover after parsing attributes in process `syz-executor087'. [ 82.525187][ T9694] bridge0: port 1(syz_tun) entered blocking state [ 82.532027][ T9694] bridge0: port 1(syz_tun) entered disabled state [ 82.539599][ T9694] device syz_tun entered promiscuous mode [ 82.551035][ T9695] netlink: 4 bytes leftover after parsing attributes in process `syz-executor087'. [ 82.568793][ T9698] netlink: 4 bytes leftover after parsing attributes in process `syz-executor087'. [ 82.580899][ T9698] device syz_tun left promiscuous mode [ 82.587207][ T9698] bridge0: port 1(syz_tun) entered disabled state executing program [ 82.713864][ T9698] bridge1: port 1(syz_tun) entered blocking state [ 82.720418][ T9698] bridge1: port 1(syz_tun) entered disabled state [ 82.727842][ T9698] device syz_tun entered promiscuous mode [ 82.748932][ T9702] netlink: 4 bytes leftover after parsing attributes in process `syz-executor087'. [ 82.761073][ T9702] device syz_tun left promiscuous mode [ 82.767059][ T9702] bridge1: port 1(syz_tun) entered disabled state executing program [ 82.903851][ T9702] bridge2: port 1(syz_tun) entered blocking state [ 82.910401][ T9702] bridge2: port 1(syz_tun) entered disabled state [ 82.918354][ T9702] device syz_tun entered promiscuous mode [ 82.941592][ T9705] device syz_tun left promiscuous mode [ 82.947930][ T9705] bridge2: port 1(syz_tun) entered disabled state executing program [ 83.073852][ T9705] bridge3: port 1(syz_tun) entered blocking state [ 83.080360][ T9705] bridge3: port 1(syz_tun) entered disabled state [ 83.087867][ T9705] device syz_tun entered promiscuous mode [ 83.111158][ T9708] device syz_tun left promiscuous mode [ 83.116885][ T9708] bridge3: port 1(syz_tun) entered disabled state [ 83.269277][ T9709] ------------[ cut here ]------------ [ 83.274760][ T9709] DEBUG_LOCKS_WARN_ON(1) [ 83.274847][ T9709] WARNING: CPU: 1 PID: 9709 at kernel/locking/lockdep.c:167 mark_lock+0x22b/0x1220 [ 83.288312][ T9709] Kernel panic - not syncing: panic_on_warn set ... [ 83.294915][ T9709] CPU: 1 PID: 9709 Comm: syz-executor087 Not tainted 5.5.0-rc5-syzkaller #0 [ 83.303577][ T9709] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.313612][ T9709] Call Trace: [ 83.316899][ T9709] dump_stack+0x197/0x210 [ 83.321232][ T9709] ? mark_lock+0x160/0x1220 [ 83.327197][ T9709] panic+0x2e3/0x75c [ 83.331073][ T9709] ? add_taint.cold+0x16/0x16 [ 83.335770][ T9709] ? __kasan_check_write+0x14/0x20 [ 83.340897][ T9709] ? __warn.cold+0x14/0x3e [ 83.345304][ T9709] ? __warn+0xd9/0x1cf [ 83.349353][ T9709] ? mark_lock+0x22b/0x1220 [ 83.353835][ T9709] __warn.cold+0x2f/0x3e [ 83.358056][ T9709] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 83.363784][ T9709] ? mark_lock+0x22b/0x1220 [ 83.368266][ T9709] report_bug+0x289/0x300 [ 83.372571][ T9709] do_error_trap+0x11b/0x200 [ 83.377144][ T9709] do_invalid_op+0x37/0x50 [ 83.381548][ T9709] ? mark_lock+0x22b/0x1220 [ 83.386029][ T9709] invalid_op+0x23/0x30 [ 83.390172][ T9709] RIP: 0010:mark_lock+0x22b/0x1220 [ 83.395261][ T9709] 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 [ 83.414955][ T9709] RSP: 0018:ffffc900020971c8 EFLAGS: 00010082 [ 83.421000][ T9709] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 83.428964][ T9709] RDX: 0000000000000000 RSI: ffffffff815e8506 RDI: fffff52000412e2b [ 83.436924][ T9709] RBP: ffffc90002097218 R08: ffff88809af8e180 R09: fffffbfff1333511 [ 83.444887][ T9709] R10: fffffbfff1333510 R11: ffffffff8999a883 R12: 0000000000000002 [ 83.452844][ T9709] R13: ffff88809af8ea68 R14: 0000000000000000 R15: 000000000004057e [ 83.460820][ T9709] ? vprintk_func+0x86/0x189 [ 83.465389][ T9709] ? mark_lock+0x22b/0x1220 [ 83.469872][ T9709] __lock_acquire+0x1370/0x4a00 [ 83.474699][ T9709] ? pointer+0x740/0x740 [ 83.478929][ T9709] ? __kasan_check_read+0x11/0x20 [ 83.483943][ T9709] ? __lock_acquire+0x8a0/0x4a00 [ 83.489202][ T9709] ? __kasan_check_read+0x11/0x20 [ 83.494219][ T9709] ? mark_held_locks+0xf0/0xf0 [ 83.498956][ T9709] ? mark_held_locks+0xa4/0xf0 [ 83.503718][ T9709] lock_acquire+0x190/0x410 [ 83.508199][ T9709] ? dev_mc_seq_show+0x3e/0x240 [ 83.513028][ T9709] _raw_spin_lock_bh+0x33/0x50 [ 83.517773][ T9709] ? dev_mc_seq_show+0x3e/0x240 [ 83.522602][ T9709] dev_mc_seq_show+0x3e/0x240 [ 83.527271][ T9709] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 83.533494][ T9709] ? dev_seq_next+0x1c1/0x220 [ 83.538158][ T9709] seq_read+0xad7/0x1170 [ 83.542392][ T9709] ? seq_open_private+0x50/0x50 [ 83.547272][ T9709] proc_reg_read+0x1fc/0x2c0 [ 83.551848][ T9709] ? proc_reg_compat_ioctl+0x2a0/0x2a0 [ 83.557289][ T9709] ? rw_verify_area+0x126/0x360 [ 83.562121][ T9709] do_iter_read+0x4a4/0x660 [ 83.566619][ T9709] ? dup_iter+0x260/0x260 [ 83.570936][ T9709] vfs_readv+0xf0/0x160 [ 83.575084][ T9709] ? compat_rw_copy_check_uvector+0x4c0/0x4c0 [ 83.581148][ T9709] ? push_pipe+0x3e2/0x6a0 [ 83.585562][ T9709] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 83.591793][ T9709] ? iov_iter_get_pages_alloc+0x3a5/0x15b0 [ 83.597602][ T9709] ? iov_iter_for_each_range+0x7d0/0x7d0 [ 83.603218][ T9709] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 83.608930][ T9709] default_file_splice_read+0x4fb/0xa20 [ 83.614461][ T9709] ? kasan_kmalloc+0x9/0x10 [ 83.618940][ T9709] ? __kmalloc+0x163/0x770 [ 83.623332][ T9709] ? splice_direct_to_actor+0x80e/0xa30 [ 83.628853][ T9709] ? iter_file_splice_write+0xc10/0xc10 [ 83.634373][ T9709] ? __lock_acquire+0x16f2/0x4a00 [ 83.639375][ T9709] ? __lock_acquire+0x16f2/0x4a00 [ 83.644398][ T9709] ? lock_downgrade+0x920/0x920 [ 83.649228][ T9709] ? rcu_read_lock_held+0x9c/0xb0 [ 83.654232][ T9709] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 83.660454][ T9709] ? fsnotify+0x7fd/0xbb0 [ 83.664771][ T9709] ? security_file_permission+0x8f/0x380 [ 83.670380][ T9709] ? rw_verify_area+0x126/0x360 [ 83.675222][ T9709] ? iter_file_splice_write+0xc10/0xc10 [ 83.680751][ T9709] do_splice_to+0x127/0x180 [ 83.685253][ T9709] splice_direct_to_actor+0x320/0xa30 [ 83.690613][ T9709] ? generic_pipe_buf_nosteal+0x10/0x10 [ 83.696149][ T9709] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 83.702458][ T9709] ? do_splice_to+0x180/0x180 [ 83.707117][ T9709] ? rw_verify_area+0x126/0x360 [ 83.711945][ T9709] do_splice_direct+0x1da/0x2a0 [ 83.716775][ T9709] ? splice_direct_to_actor+0xa30/0xa30 [ 83.722314][ T9709] ? rw_verify_area+0x126/0x360 [ 83.727156][ T9709] do_sendfile+0x597/0xd00 [ 83.731561][ T9709] ? do_compat_pwritev64+0x1c0/0x1c0 [ 83.736914][ T9709] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 83.742871][ T9709] ? __x64_sys_futex+0x404/0x590 [ 83.747786][ T9709] __x64_sys_sendfile64+0x1dd/0x220 [ 83.752962][ T9709] ? __ia32_sys_sendfile+0x230/0x230 [ 83.758227][ T9709] ? do_syscall_64+0x26/0x790 [ 83.762893][ T9709] ? lockdep_hardirqs_on+0x421/0x5e0 [ 83.768159][ T9709] ? trace_hardirqs_on+0x67/0x240 [ 83.773177][ T9709] do_syscall_64+0xfa/0x790 [ 83.777681][ T9709] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 83.783572][ T9709] RIP: 0033:0x447709 [ 83.787821][ T9709] 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 [ 83.807413][ T9709] RSP: 002b:00007fd489e0acf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 83.815837][ T9709] RAX: ffffffffffffffda RBX: 00000000006dcc98 RCX: 0000000000447709 [ 83.823788][ T9709] RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000005 [ 83.831738][ T9709] RBP: 00000000006dcc90 R08: 0000000000000000 R09: 0000000000000000 [ 83.839702][ T9709] R10: 000000006f0a77bd R11: 0000000000000246 R12: 00000000006dcc9c [ 83.848118][ T9709] R13: 00007fd489e0ad10 R14: 00007fd489e0ad10 R15: a7ffffffffffffde [ 83.857301][ T9709] Kernel Offset: disabled [ 83.861624][ T9709] Rebooting in 86400 seconds..