[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 65.977710][ T27] audit: type=1800 audit(1584724166.044:25): pid=9468 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 65.999302][ T27] audit: type=1800 audit(1584724166.044:26): pid=9468 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 66.063321][ T27] audit: type=1800 audit(1584724166.044:27): pid=9468 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 '10.128.1.56' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 76.282637][ T9618] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN [ 76.295500][ T9618] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 76.304296][ T9618] CPU: 1 PID: 9618 Comm: syz-executor260 Not tainted 5.6.0-rc5-syzkaller #0 [ 76.313292][ T9618] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.323965][ T9618] RIP: 0010:ethnl_parse_header+0x522/0x840 [ 76.329869][ T9618] Code: ea 03 80 3c 02 00 0f 85 1d 03 00 00 4d 89 7d 08 e8 d3 70 2d fb 49 8d 7d 10 48 ba 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 <0f> b6 0c 10 49 8d 45 13 48 89 c6 48 c1 ee 03 0f b6 14 16 48 89 fe [ 76.350033][ T9618] RSP: 0018:ffffc90001f774d8 EFLAGS: 00010202 [ 76.356089][ T9618] RAX: 0000000000000002 RBX: ffff88809f326414 RCX: ffffffff8644a170 [ 76.364214][ T9618] RDX: dffffc0000000000 RSI: ffffffff8644a4ed RDI: 0000000000000010 [ 76.372262][ T9618] RBP: ffff8880a1c909c0 R08: ffff888093c784c0 R09: ffffc90001f77510 [ 76.380228][ T9618] R10: fffff520003eeea5 R11: ffffc90001f7752f R12: 1ffff920003eee9e [ 76.388193][ T9618] R13: 0000000000000000 R14: ffffffff8a343080 R15: ffff88809f326418 [ 76.396163][ T9618] FS: 0000000000db9880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 76.405080][ T9618] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.411656][ T9618] CR2: 000000000043e930 CR3: 00000000a8560000 CR4: 00000000001406e0 [ 76.419856][ T9618] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.427828][ T9618] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.435792][ T9618] Call Trace: [ 76.439080][ T9618] ? ethnl_default_notify+0x690/0x690 [ 76.444440][ T9618] ? __nla_parse+0x2e/0x60 [ 76.449873][ T9618] ethnl_default_parse+0x1c1/0x300 [ 76.455004][ T9618] ethnl_default_start+0x1ed/0x4d0 [ 76.460248][ T9618] __netlink_dump_start+0x58a/0x910 [ 76.465447][ T9618] ? ethnl_default_parse+0x300/0x300 [ 76.470726][ T9618] genl_rcv_msg+0xa32/0xdf0 [ 76.475218][ T9618] ? genl_family_rcv_msg_attrs_parse+0x320/0x320 [ 76.481796][ T9618] ? ethnl_default_parse+0x300/0x300 [ 76.487077][ T9618] ? ethnl_fill_reply_header.part.0+0x330/0x330 [ 76.493314][ T9618] ? lockdep_genl_is_held+0x30/0x30 [ 76.499690][ T9618] ? mark_held_locks+0xe0/0xe0 [ 76.504467][ T9618] ? mark_held_locks+0xe0/0xe0 [ 76.509229][ T9618] netlink_rcv_skb+0x15a/0x410 [ 76.513984][ T9618] ? genl_family_rcv_msg_attrs_parse+0x320/0x320 [ 76.520991][ T9618] ? netlink_ack+0xa10/0xa10 [ 76.525595][ T9618] genl_rcv+0x24/0x40 [ 76.529829][ T9618] netlink_unicast+0x537/0x740 [ 76.534779][ T9618] ? netlink_attachskb+0x810/0x810 [ 76.540072][ T9618] ? _copy_from_iter_full+0x25c/0x870 [ 76.545434][ T9618] ? __phys_addr_symbol+0x2c/0x70 [ 76.550583][ T9618] ? __check_object_size+0x171/0x437 [ 76.555865][ T9618] netlink_sendmsg+0x882/0xe10 [ 76.560613][ T9618] ? aa_af_perm+0x260/0x260 [ 76.565129][ T9618] ? netlink_unicast+0x740/0x740 [ 76.570313][ T9618] ? netlink_unicast+0x740/0x740 [ 76.575250][ T9618] sock_sendmsg+0xcf/0x120 [ 76.579671][ T9618] ____sys_sendmsg+0x6b9/0x7d0 [ 76.584439][ T9618] ? kernel_sendmsg+0x50/0x50 [ 76.589130][ T9618] ? __lock_acquire+0x14bd/0x3ca0 [ 76.594144][ T9618] ___sys_sendmsg+0x100/0x170 [ 76.598825][ T9618] ? sendmsg_copy_msghdr+0x70/0x70 [ 76.604016][ T9618] ? debug_object_active_state+0x28a/0x350 [ 76.609983][ T9618] ? mark_lock+0xbc/0x1220 [ 76.614407][ T9618] ? __lock_acquire+0x14bd/0x3ca0 [ 76.619427][ T9618] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 76.625219][ T9618] ? find_held_lock+0x2d/0x110 [ 76.629999][ T9618] ? __fget_light+0x1a5/0x270 [ 76.634805][ T9618] __sys_sendmsg+0xec/0x1b0 [ 76.639833][ T9618] ? __sys_sendmsg_sock+0xb0/0xb0 [ 76.644850][ T9618] ? _raw_spin_unlock_irq+0x1f/0x80 [ 76.651131][ T9618] ? trace_hardirqs_off_caller+0x55/0x230 [ 76.656877][ T9618] ? do_syscall_64+0x21/0x7d0 [ 76.661563][ T9618] do_syscall_64+0xf6/0x7d0 [ 76.666061][ T9618] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 76.672066][ T9618] RIP: 0033:0x444159 [ 76.675948][ T9618] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 1b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 76.695637][ T9618] RSP: 002b:00007fffce793ec8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 76.704055][ T9618] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000444159 [ 76.712184][ T9618] RDX: 0000000000000000 RSI: 0000000020000780 RDI: 0000000000000003 [ 76.720159][ T9618] RBP: 00000000006ce018 R08: 0000000000000000 R09: 00000000004002e0 [ 76.728942][ T9618] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401e00 [ 76.736901][ T9618] R13: 0000000000401e90 R14: 0000000000000000 R15: 0000000000000000 [ 76.745079][ T9618] Modules linked in: [ 76.749369][ T9618] ---[ end trace 4a1c933806fc4423 ]--- [ 76.755212][ T9618] RIP: 0010:ethnl_parse_header+0x522/0x840 [ 76.761133][ T9618] Code: ea 03 80 3c 02 00 0f 85 1d 03 00 00 4d 89 7d 08 e8 d3 70 2d fb 49 8d 7d 10 48 ba 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 <0f> b6 0c 10 49 8d 45 13 48 89 c6 48 c1 ee 03 0f b6 14 16 48 89 fe [ 76.781826][ T9618] RSP: 0018:ffffc90001f774d8 EFLAGS: 00010202 [ 76.787932][ T9618] RAX: 0000000000000002 RBX: ffff88809f326414 RCX: ffffffff8644a170 [ 76.795947][ T9618] RDX: dffffc0000000000 RSI: ffffffff8644a4ed RDI: 0000000000000010 [ 76.803955][ T9618] RBP: ffff8880a1c909c0 R08: ffff888093c784c0 R09: ffffc90001f77510 [ 76.812415][ T9618] R10: fffff520003eeea5 R11: ffffc90001f7752f R12: 1ffff920003eee9e [ 76.820463][ T9618] R13: 0000000000000000 R14: ffffffff8a343080 R15: ffff88809f326418 [ 76.828700][ T9618] FS: 0000000000db9880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 76.837712][ T9618] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.844723][ T9618] CR2: 000000000043e930 CR3: 00000000a8560000 CR4: 00000000001406e0 [ 76.852818][ T9618] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.860989][ T9618] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.868989][ T9618] Kernel panic - not syncing: Fatal exception [ 76.876629][ T9618] Kernel Offset: disabled [ 76.881094][ T9618] Rebooting in 86400 seconds..