[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 14.631454] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 18.814916] random: sshd: uninitialized urandom read (32 bytes read) [ 19.111566] random: sshd: uninitialized urandom read (32 bytes read) [ 19.778469] random: sshd: uninitialized urandom read (32 bytes read) [ 24.995690] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.45' (ECDSA) to the list of known hosts. [ 30.424988] random: sshd: uninitialized urandom read (32 bytes read) net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 [ 30.511570] IPVS: ftp: loaded support on port[0] = 21 [ 30.648119] bridge0: port 1(bridge_slave_0) entered blocking state [ 30.654489] bridge0: port 1(bridge_slave_0) entered disabled state [ 30.661509] device bridge_slave_0 entered promiscuous mode [ 30.674182] bridge0: port 2(bridge_slave_1) entered blocking state [ 30.680570] bridge0: port 2(bridge_slave_1) entered disabled state [ 30.687345] device bridge_slave_1 entered promiscuous mode [ 30.699909] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 30.712805] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 30.742832] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 30.757559] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 30.800381] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 30.807405] team0: Port device team_slave_0 added [ 30.818722] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 30.825695] team0: Port device team_slave_1 added [ 30.837276] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready RTNETLINK answers: Operation not supported [ 30.850890] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 30.864111] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 30.877725] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported [ 30.957156] bridge0: port 2(bridge_slave_1) entered blocking state [ 30.963527] bridge0: port 2(bridge_slave_1) entered forwarding state [ 30.970107] bridge0: port 1(bridge_slave_0) entered blocking state [ 30.976485] bridge0: port 1(bridge_slave_0) entered forwarding state RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument [ 31.251643] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 31.257748] 8021q: adding VLAN 0 to HW filter on device bond0 [ 31.288101] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 31.319457] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 31.326442] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 31.358514] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 31.364615] 8021q: adding VLAN 0 to HW filter on device team0 executing program executing program executing program executing program executing program executing program executing program executing program [ 31.608393] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready 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 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 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 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 [ 38.264808] PANIC: double fault, error_code: 0x0 [ 38.269620] CPU: 1 PID: 6540 Comm: syz-executor143 Not tainted 4.18.0-rc3+ #45 [ 38.276957] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.286301] RIP: 0010:__lock_acquire+0x2e/0x5020 [ 38.291035] Code: 41 57 41 89 cf 41 56 41 55 49 89 fd 41 54 45 89 cc 53 65 4c 8b 34 25 40 ee 01 00 48 83 e4 f0 48 81 ec 60 03 00 00 48 8b 45 10 <89> 94 24 80 00 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 84 24 98 [ 38.310172] RSP: 0018:ffff8801c8d47ec0 EFLAGS: 00010086 [ 38.315724] RAX: 0000000000000000 RBX: 1ffff100391a9055 RCX: 0000000000000002 [ 38.322972] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff88f92620 [ 38.330257] RBP: ffff8801c8d48250 R08: 0000000000000000 R09: 0000000000000000 [ 38.337505] R10: 0000000000000000 R11: dffffc0000000000 R12: 0000000000000000 [ 38.344752] R13: ffffffff88f92620 R14: ffff8801b6458380 R15: 0000000000000002 [ 38.352001] FS: 00007f2c1538b700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 38.360219] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.366079] CR2: ffff8801c8d47eb8 CR3: 0000000008e6a000 CR4: 00000000001406e0 [ 38.373330] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.380587] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.387834] Call Trace: [ 38.390395] Kernel panic - not syncing: Machine halted. [ 38.395738] CPU: 1 PID: 6540 Comm: syz-executor143 Not tainted 4.18.0-rc3+ #45 [ 38.403086] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.412416] Call Trace: [ 38.414974] <#DF> [ 38.417113] dump_stack+0x1c9/0x2b4 [ 38.420731] ? dump_stack_print_info.cold.2+0x52/0x52 [ 38.425907] panic+0x238/0x4e7 [ 38.429081] ? add_taint.cold.5+0x16/0x16 [ 38.433210] ? get_cpu_entry_area+0xc/0x30 [ 38.437424] df_debug+0x2d/0x2e [ 38.440685] do_double_fault+0x113/0x200 [ 38.444725] double_fault+0x23/0x30 [ 38.448343] RIP: 0010:__lock_acquire+0x2e/0x5020 [ 38.453071] Code: 41 57 41 89 cf 41 56 41 55 49 89 fd 41 54 45 89 cc 53 65 4c 8b 34 25 40 ee 01 00 48 83 e4 f0 48 81 ec 60 03 00 00 48 8b 45 10 <89> 94 24 80 00 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 84 24 98 [ 38.472191] RSP: 0018:ffff8801c8d47ec0 EFLAGS: 00010086 [ 38.477530] RAX: 0000000000000000 RBX: 1ffff100391a9055 RCX: 0000000000000002 [ 38.484776] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff88f92620 [ 38.492029] RBP: ffff8801c8d48250 R08: 0000000000000000 R09: 0000000000000000 [ 38.499279] R10: 0000000000000000 R11: dffffc0000000000 R12: 0000000000000000 [ 38.506525] R13: ffffffff88f92620 R14: ffff8801b6458380 R15: 0000000000000002 [ 38.513779] WARNING: kernel stack regs at (____ptrval____) in syz-executor143:6540 has bad 'bp' value (____ptrval____) [ 38.513784] unwind stack type:0 next_sp:(____ptrval____) mask:0x20 graph_idx:0 [ 38.513792] (____ptrval____): fffffe0000039d78 (0xfffffe0000039d78) [ 38.513804] (____ptrval____): ffffffff812a9105 (show_trace_log_lvl+0x1f6/0x28c) [ 38.513817] (____ptrval____): ffffffff815ea86e (__lock_acquire+0x2e/0x5020) [ 38.513822] (____ptrval____): fffffe0000039fd8 (0xfffffe0000039fd8) [ 38.513826] (____ptrval____): 0000000000000020 (0x20) [ 38.513830] (____ptrval____): 0000000000000005 (0x5) [ 38.513835] (____ptrval____): fffffe0000038000 (0xfffffe0000038000) [ 38.513840] (____ptrval____): fffffe000003a000 (0xfffffe000003a000) [ 38.513844] (____ptrval____): ffff8801c8d47ec0 (0xffff8801c8d47ec0) [ 38.513847] (____ptrval____): 0000000000000000 ... [ 38.513851] (____ptrval____): fffffe0000038000 (0xfffffe0000038000) [ 38.513856] (____ptrval____): fffffe000003a000 (0xfffffe000003a000) [ 38.513861] (____ptrval____): ffff8801c8d47ec0 (0xffff8801c8d47ec0) [ 38.513865] (____ptrval____): 0000000000000020 (0x20) [ 38.513870] (____ptrval____): ffff8801b6458380 (0xffff8801b6458380) [ 38.513874] (____ptrval____): 0000010100000000 (0x10100000000) [ 38.513877] (____ptrval____): 0000000000000000 ... [ 38.513881] (____ptrval____): fffffe0000039ca8 (0xfffffe0000039ca8) [ 38.513889] (____ptrval____): ffffffff815ea86e (__lock_acquire+0x2e/0x5020) [ 38.513894] (____ptrval____): fffffe0000039f58 (0xfffffe0000039f58) [ 38.513899] (____ptrval____): a02997a2f2664200 (0xa02997a2f2664200) [ 38.513903] (____ptrval____): 0000000000000093 (0x93) [ 38.513905] (____ptrval____): 0000000000000000 ... [ 38.513914] (____ptrval____): ffffffff88f1b060 (pv_cpu_ops+0x120/0x120) [ 38.513919] (____ptrval____): 00000000ffffffff (0xffffffff) [ 38.513923] (____ptrval____): fffffe0000039d88 (0xfffffe0000039d88) [ 38.513930] (____ptrval____): ffffffff812a91d3 (show_stack+0x38/0x3a) [ 38.513935] (____ptrval____): fffffe0000039e38 (0xfffffe0000039e38) [ 38.513945] (____ptrval____): ffffffff878ce585 (dump_stack+0x1c9/0x2b4) [ 38.513950] (____ptrval____): fffffbfff11e360c (0xfffffbfff11e360c) [ 38.513954] (____ptrval____): dffffc0000000000 (0xdffffc0000000000) [ 38.513959] (____ptrval____): 1fffffc0000073b6 (0x1fffffc0000073b6) [ 38.513963] (____ptrval____): 0000000041b58ab3 (0x41b58ab3) [ 38.513973] (____ptrval____): ffffffff88bd4364 (regoff.33333+0x368824/0x37b360) [ 38.513981] (____ptrval____): ffffffff878ce3bc (dump_stack_print_info.cold.2+0x52/0x52) [ 38.513986] (____ptrval____): fffffe0000039df8 (0xfffffe0000039df8) [ 38.513988] (____ptrval____): 0000000000000000 ... [ 38.513993] (____ptrval____): fffffe0000039e40 (0xfffffe0000039e40) [ 38.513997] (____ptrval____): ffff8801c8d48000 (0xffff8801c8d48000) [ 38.514003] (____ptrval____): fffffe0000039e18 (0xfffffe0000039e18) [ 38.514011] (____ptrval____): a02997a2f2664200 (0xa02997a2f2664200) [ 38.514019] (____ptrval____): ffff8801c8d48000 (0xffff8801c8d48000) [ 38.514032] (____ptrval____): ffffffff89e71d60 (buf.37258+0x40/0x40) [ 38.514037] (____ptrval____): a02997a2f2664200 (0xa02997a2f2664200) [ 38.514039] (____ptrval____): 0000000000000000 ... [ 38.514047] (____ptrval____): ffffffff87e742a0 (hpet_msi_domain_info+0xe40/0x1a80) [ 38.514051] (____ptrval____): 0000000000000001 (0x1) [ 38.514054] (____ptrval____): 0000000000000000 ... [ 38.514058] (____ptrval____): fffffe0000039f00 (0xfffffe0000039f00) [ 38.514067] (____ptrval____): ffffffff81473ab9 (panic+0x238/0x4e7) [ 38.514071] (____ptrval____): 0000000041b58ab3 (0x41b58ab3) [ 38.514078] (____ptrval____): ffffffff88bea3cc (K512_4+0x130c/0x120734) [ 38.514085] (____ptrval____): ffffffff81473881 (add_taint.cold.5+0x16/0x16) [ 38.514088] (____ptrval____): 0000000000000000 ... [ 38.514092] (____ptrval____): 0000000000000008 (0x8) [ 38.514097] (____ptrval____): fffffe0000039f10 (0xfffffe0000039f10) [ 38.514101] (____ptrval____): fffffe0000039ea8 (0xfffffe0000039ea8) [ 38.514104] (____ptrval____): 0000000000000000 ... [ 38.514108] (____ptrval____): ffff8801b6458380 (0xffff8801b6458380) [ 38.514113] (____ptrval____): 0000010000000000 (0x10000000000) [ 38.514115] (____ptrval____): 0000000000000000 ... [ 38.514120] (____ptrval____): a02997a2f2664200 (0xa02997a2f2664200) [ 38.514122] (____ptrval____): 0000000000000000 ... [ 38.514130] (____ptrval____): ffffffff8137bfcc (get_cpu_entry_area+0xc/0x30) [ 38.514135] (____ptrval____): fffffe0000033000 (0xfffffe0000033000) [ 38.514139] (____ptrval____): 0000000000000004 (0x4) [ 38.514143] (____ptrval____): 000000000001ede0 (0x1ede0) [ 38.514148] (____ptrval____): fffffe0000039e60 (0xfffffe0000039e60) [ 38.514152] (____ptrval____): fffffe0000039f58 (0xfffffe0000039f58) [ 38.514155] (____ptrval____): 0000000000000000 ... [ 38.514163] (____ptrval____): ffffffff87e4a540 (__func__.44280+0x40/0x40) [ 38.514167] (____ptrval____): ffff8801c8d47ec0 (0xffff8801c8d47ec0) [ 38.514170] (____ptrval____): 0000000000000000 ... [ 38.514175] (____ptrval____): fffffe0000039f18 (0xfffffe0000039f18) [ 38.514181] (____ptrval____): ffffffff813470df (df_debug+0x2d/0x2e) [ 38.514186] (____ptrval____): fffffe0000039f58 (0xfffffe0000039f58) [ 38.514190] (____ptrval____): fffffe0000039f48 (0xfffffe0000039f48) [ 38.514197] (____ptrval____): ffffffff8129c1f3 (do_double_fault+0x113/0x200) [ 38.514201] (____ptrval____): 0000000000000001 (0x1) [ 38.514203] (____ptrval____): 0000000000000000 ... [ 38.514208] (____ptrval____): fffffe0000039f59 (0xfffffe0000039f59) [ 38.514215] (____ptrval____): ffffffff87a00bd3 (double_fault+0x23/0x30) [ 38.514219] (____ptrval____): 0000000000000002 (0x2) [ 38.514224] (____ptrval____): ffff8801b6458380 (0xffff8801b6458380) [ 38.514232] (____ptrval____): ffffffff88f92620 (rcu_bh_lock_map+0x40/0x40) [ 38.514235] (____ptrval____): 0000000000000000 ... [ 38.514239] (____ptrval____): ffff8801c8d48250 (0xffff8801c8d48250) [ 38.514244] (____ptrval____): 1ffff100391a9055 (0x1ffff100391a9055) [ 38.514248] (____ptrval____): dffffc0000000000 (0xdffffc0000000000) [ 38.514251] (____ptrval____): 0000000000000000 ... [ 38.514255] (____ptrval____): 0000000000000002 (0x2) [ 38.514257] (____ptrval____): 0000000000000000 ... [ 38.514264] (____ptrval____): ffffffff88f92620 (rcu_bh_lock_map+0x40/0x40) [ 38.514269] (____ptrval____): ffffffffffffffff (0xffffffffffffffff) [ 38.514277] (____ptrval____): ffffffff815ea86e (__lock_acquire+0x2e/0x5020) [ 38.514281] (____ptrval____): 0000000000000010 (0x10) [ 38.514285] (____ptrval____): 0000000000010086 (0x10086) [ 38.514289] (____ptrval____): ffff8801c8d47ec0 (0xffff8801c8d47ec0) [ 38.514293] (____ptrval____): 0000000000000018 (0x18) [ 38.514296] [ 39.136224] Dumping ftrace buffer: [ 39.139739] (ftrace buffer empty) [ 39.143422] Kernel Offset: disabled [ 39.147040] Rebooting in 86400 seconds..