[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.467327] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.800623] random: sshd: uninitialized urandom read (32 bytes read) [ 21.081569] random: sshd: uninitialized urandom read (32 bytes read) [ 21.800311] random: sshd: uninitialized urandom read (32 bytes read) [ 21.943315] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.44' (ECDSA) to the list of known hosts. [ 27.660235] random: sshd: uninitialized urandom read (32 bytes read) [ 27.744841] IPVS: ftp: loaded support on port[0] = 21 [ 30.229618] PANIC: double fault, error_code: 0x0 [ 30.234437] CPU: 1 PID: 4716 Comm: syz-executor914 Not tainted 4.18.0-rc3+ #56 [ 30.241778] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.251124] RIP: 0010:__lock_acquire+0x2e/0x5020 [ 30.255867] 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 [ 30.275033] RSP: 0018:ffff8800fffffee0 EFLAGS: 00010082 [ 30.280382] RAX: 0000000000000000 RBX: 1ffff10020000058 RCX: 0000000000000002 [ 30.287649] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff88f92620 [ 30.294907] RBP: ffff880100000268 R08: 0000000000000000 R09: 0000000000000000 [ 30.302161] R10: ffff8801aa017be0 R11: ffff8801aa2ecd3b R12: 0000000000000000 [ 30.309418] R13: ffffffff88f92620 R14: ffff8801aa2ec5c0 R15: 0000000000000002 [ 30.316688] FS: 0000000002403940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 30.324904] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.330770] CR2: ffff8800fffffed8 CR3: 00000001aa0bd000 CR4: 00000000001406e0 [ 30.338056] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.345322] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.352577] Call Trace: [ 30.355150] Kernel panic - not syncing: Machine halted. [ 30.360507] CPU: 1 PID: 4716 Comm: syz-executor914 Not tainted 4.18.0-rc3+ #56 [ 30.367854] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.377196] Call Trace: [ 30.379771] <#DF> [ 30.381910] dump_stack+0x1c9/0x2b4 [ 30.385538] ? dump_stack_print_info.cold.2+0x52/0x52 [ 30.390748] panic+0x238/0x4e7 [ 30.393952] ? add_taint.cold.5+0x16/0x16 [ 30.398099] ? get_cpu_entry_area+0xc/0x30 [ 30.402337] df_debug+0x2d/0x2e [ 30.405642] do_double_fault+0x113/0x200 [ 30.409710] double_fault+0x23/0x30 [ 30.413335] RIP: 0010:__lock_acquire+0x2e/0x5020 [ 30.418069] 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 [ 30.437162] RSP: 0018:ffff8800fffffee0 EFLAGS: 00010082 [ 30.442514] RAX: 0000000000000000 RBX: 1ffff10020000058 RCX: 0000000000000002 [ 30.449767] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff88f92620 [ 30.457024] RBP: ffff880100000268 R08: 0000000000000000 R09: 0000000000000000 [ 30.464286] R10: ffff8801aa017be0 R11: ffff8801aa2ecd3b R12: 0000000000000000 [ 30.471543] R13: ffffffff88f92620 R14: ffff8801aa2ec5c0 R15: 0000000000000002 [ 30.478840] WARNING: kernel stack regs at (____ptrval____) in syz-executor914:4716 has bad 'bp' value (____ptrval____) [ 30.478845] unwind stack type:0 next_sp:(____ptrval____) mask:0x20 graph_idx:0 [ 30.478853] (____ptrval____): fffffe0000039d78 (0xfffffe0000039d78) [ 30.478866] (____ptrval____): ffffffff812a9105 (show_trace_log_lvl+0x1f6/0x28c) [ 30.478876] (____ptrval____): ffffffff815ea86e (__lock_acquire+0x2e/0x5020) [ 30.478882] (____ptrval____): fffffe0000039fd8 (0xfffffe0000039fd8) [ 30.478886] (____ptrval____): 0000000000000020 (0x20) [ 30.478892] (____ptrval____): 0000000000000005 (0x5) [ 30.478900] (____ptrval____): fffffe0000038000 (0xfffffe0000038000) [ 30.478918] (____ptrval____): fffffe000003a000 (0xfffffe000003a000) [ 30.478927] (____ptrval____): ffff8800fffffee0 (0xffff8800fffffee0) [ 30.478932] (____ptrval____): 0000000000000000 ... [ 30.478941] (____ptrval____): fffffe0000038000 (0xfffffe0000038000) [ 30.478949] (____ptrval____): fffffe000003a000 (0xfffffe000003a000) [ 30.478956] (____ptrval____): ffff8800fffffee0 (0xffff8800fffffee0) [ 30.478962] (____ptrval____): 0000000000000020 (0x20) [ 30.478971] (____ptrval____): ffff8801aa2ec5c0 (0xffff8801aa2ec5c0) [ 30.478976] (____ptrval____): 0000010100000000 (0x10100000000) [ 30.478978] (____ptrval____): 0000000000000000 ... [ 30.478983] (____ptrval____): fffffe0000039ca8 (0xfffffe0000039ca8) [ 30.478992] (____ptrval____): ffffffff815ea86e (__lock_acquire+0x2e/0x5020) [ 30.478997] (____ptrval____): fffffe0000039f58 (0xfffffe0000039f58) [ 30.479003] (____ptrval____): 64ec0e8304455e00 (0x64ec0e8304455e00) [ 30.479011] (____ptrval____): 0000000000000093 (0x93) [ 30.479015] (____ptrval____): 0000000000000000 ... [ 30.479029] (____ptrval____): ffffffff88f1b060 (pv_cpu_ops+0x120/0x120) [ 30.479037] (____ptrval____): 00000000ffffffff (0xffffffff) [ 30.479045] (____ptrval____): fffffe0000039d88 (0xfffffe0000039d88) [ 30.479053] (____ptrval____): ffffffff812a91d3 (show_stack+0x38/0x3a) [ 30.479058] (____ptrval____): fffffe0000039e38 (0xfffffe0000039e38) [ 30.479067] (____ptrval____): ffffffff878f6975 (dump_stack+0x1c9/0x2b4) [ 30.479072] (____ptrval____): fffffbfff11e360c (0xfffffbfff11e360c) [ 30.479077] (____ptrval____): dffffc0000000000 (0xdffffc0000000000) [ 30.479082] (____ptrval____): 1fffffc0000073b6 (0x1fffffc0000073b6) [ 30.479087] (____ptrval____): 0000000041b58ab3 (0x41b58ab3) [ 30.479096] (____ptrval____): ffffffff88bd7744 (regoff.33338+0x3694c4/0x37c000) [ 30.479103] (____ptrval____): ffffffff878f67ac (dump_stack_print_info.cold.2+0x52/0x52) [ 30.479109] (____ptrval____): fffffe0000039df8 (0xfffffe0000039df8) [ 30.479111] (____ptrval____): 0000000000000000 ... [ 30.479116] (____ptrval____): fffffe0000039e40 (0xfffffe0000039e40) [ 30.479121] (____ptrval____): ffff880100000000 (0xffff880100000000) [ 30.479126] (____ptrval____): fffffe0000039e18 (0xfffffe0000039e18) [ 30.479131] (____ptrval____): 64ec0e8304455e00 (0x64ec0e8304455e00) [ 30.479136] (____ptrval____): ffff880100000000 (0xffff880100000000) [ 30.479145] (____ptrval____): ffffffff89e74d60 (buf.37263+0x40/0x40) [ 30.479150] (____ptrval____): 64ec0e8304455e00 (0x64ec0e8304455e00) [ 30.479153] (____ptrval____): 0000000000000000 ... [ 30.479163] (____ptrval____): ffffffff87e742e0 (hpet_msi_domain_info+0xe40/0x1a80) [ 30.479168] (____ptrval____): 0000000000000001 (0x1) [ 30.479170] (____ptrval____): 0000000000000000 ... [ 30.479175] (____ptrval____): fffffe0000039f00 (0xfffffe0000039f00) [ 30.479185] (____ptrval____): ffffffff81473ab9 (panic+0x238/0x4e7) [ 30.479189] (____ptrval____): 0000000041b58ab3 (0x41b58ab3) [ 30.479197] (____ptrval____): ffffffff88bed78c (K512_4+0x130c/0x120eac) [ 30.479206] (____ptrval____): ffffffff81473881 (add_taint.cold.5+0x16/0x16) [ 30.479208] (____ptrval____): 0000000000000000 ... [ 30.479213] (____ptrval____): 0000000000000008 (0x8) [ 30.479218] (____ptrval____): fffffe0000039f10 (0xfffffe0000039f10) [ 30.479223] (____ptrval____): fffffe0000039ea8 (0xfffffe0000039ea8) [ 30.479225] (____ptrval____): 0000000000000000 ... [ 30.479230] (____ptrval____): ffff8801aa2ec5c0 (0xffff8801aa2ec5c0) [ 30.479235] (____ptrval____): 0000010000000000 (0x10000000000) [ 30.479238] (____ptrval____): 0000000000000000 ... [ 30.479243] (____ptrval____): 64ec0e8304455e00 (0x64ec0e8304455e00) [ 30.479245] (____ptrval____): 0000000000000000 ... [ 30.479254] (____ptrval____): ffffffff8137bfcc (get_cpu_entry_area+0xc/0x30) [ 30.479259] (____ptrval____): fffffe0000033000 (0xfffffe0000033000) [ 30.479263] (____ptrval____): 0000000000000004 (0x4) [ 30.479268] (____ptrval____): 000000000001ede0 (0x1ede0) [ 30.479273] (____ptrval____): fffffe0000039e60 (0xfffffe0000039e60) [ 30.479278] (____ptrval____): fffffe0000039f58 (0xfffffe0000039f58) [ 30.479280] (____ptrval____): 0000000000000000 ... [ 30.479290] (____ptrval____): ffffffff87e4a580 (__func__.44285+0x40/0x40) [ 30.479295] (____ptrval____): ffff8800fffffee0 (0xffff8800fffffee0) [ 30.479297] (____ptrval____): 0000000000000000 ... [ 30.479302] (____ptrval____): fffffe0000039f18 (0xfffffe0000039f18) [ 30.479309] (____ptrval____): ffffffff813470df (df_debug+0x2d/0x2e) [ 30.479314] (____ptrval____): fffffe0000039f58 (0xfffffe0000039f58) [ 30.479319] (____ptrval____): fffffe0000039f48 (0xfffffe0000039f48) [ 30.479327] (____ptrval____): ffffffff8129c1f3 (do_double_fault+0x113/0x200) [ 30.479331] (____ptrval____): 0000000000000001 (0x1) [ 30.479334] (____ptrval____): 0000000000000000 ... [ 30.479338] (____ptrval____): fffffe0000039f59 (0xfffffe0000039f59) [ 30.479347] (____ptrval____): ffffffff87a00bd3 (double_fault+0x23/0x30) [ 30.479351] (____ptrval____): 0000000000000002 (0x2) [ 30.479356] (____ptrval____): ffff8801aa2ec5c0 (0xffff8801aa2ec5c0) [ 30.479365] (____ptrval____): ffffffff88f92620 (rcu_bh_lock_map+0x40/0x40) [ 30.479367] (____ptrval____): 0000000000000000 ... [ 30.479372] (____ptrval____): ffff880100000268 (0xffff880100000268) [ 30.479377] (____ptrval____): 1ffff10020000058 (0x1ffff10020000058) [ 30.479382] (____ptrval____): ffff8801aa2ecd3b (0xffff8801aa2ecd3b) [ 30.479387] (____ptrval____): ffff8801aa017be0 (0xffff8801aa017be0) [ 30.479390] (____ptrval____): 0000000000000000 ... [ 30.479394] (____ptrval____): 0000000000000002 (0x2) [ 30.479397] (____ptrval____): 0000000000000000 ... [ 30.479404] (____ptrval____): ffffffff88f92620 (rcu_bh_lock_map+0x40/0x40) [ 30.479409] (____ptrval____): ffffffffffffffff (0xffffffffffffffff) [ 30.479417] (____ptrval____): ffffffff815ea86e (__lock_acquire+0x2e/0x5020) [ 30.479422] (____ptrval____): 0000000000000010 (0x10) [ 30.479426] (____ptrval____): 0000000000010082 (0x10082) [ 30.479432] (____ptrval____): ffff8800fffffee0 (0xffff8800fffffee0) [ 30.479436] (____ptrval____): 0000000000000018 (0x18) [ 30.479439] [ 31.108507] Dumping ftrace buffer: [ 31.112024] (ftrace buffer empty) [ 31.115711] Kernel Offset: disabled [ 31.119406] Rebooting in 86400 seconds..