[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 14.523652] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 25.097698] random: sshd: uninitialized urandom read (32 bytes read) [ 25.554757] random: sshd: uninitialized urandom read (32 bytes read) [ 26.122459] random: sshd: uninitialized urandom read (32 bytes read) [ 62.559988] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.42' (ECDSA) to the list of known hosts. [ 68.036598] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program [ 68.117622] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 71.787275] PANIC: double fault, error_code: 0x0 [ 71.792109] CPU: 1 PID: 5462 Comm: syz-executor356 Not tainted 4.18.0-rc3+ #58 [ 71.799454] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.808815] RIP: 0010:__lock_acquire+0x2e/0x5020 [ 71.813545] 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 [ 71.832630] RSP: 0018:ffff8800fffffe70 EFLAGS: 00010082 [ 71.837972] RAX: 0000000000000000 RBX: 1ffff1002000004b RCX: 0000000000000002 [ 71.845224] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff88f92620 [ 71.852483] RBP: ffff880100000200 R08: 0000000000000000 R09: 0000000000000000 [ 71.859733] R10: ffff8801a942fbe0 R11: ffff8801d85baabb R12: 0000000000000000 [ 71.866981] R13: ffffffff88f92620 R14: ffff8801d85ba340 R15: 0000000000000002 [ 71.874230] FS: 00000000013d1880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 71.882445] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 71.888304] CR2: ffff8800fffffe68 CR3: 00000001cf21e000 CR4: 00000000001406e0 [ 71.895557] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 71.902823] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 71.910070] Call Trace: [ 71.912630] Kernel panic - not syncing: Machine halted. [ 71.917971] CPU: 1 PID: 5462 Comm: syz-executor356 Not tainted 4.18.0-rc3+ #58 [ 71.925408] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.934739] Call Trace: [ 71.937301] <#DF> [ 71.939440] dump_stack+0x1c9/0x2b4 [ 71.943046] ? dump_stack_print_info.cold.2+0x52/0x52 [ 71.948217] panic+0x238/0x4e7 [ 71.951391] ? add_taint.cold.5+0x16/0x16 [ 71.955517] ? get_cpu_entry_area+0xc/0x30 [ 71.959741] df_debug+0x2d/0x2e [ 71.962997] do_double_fault+0x113/0x200 [ 71.967074] double_fault+0x23/0x30 [ 71.970694] RIP: 0010:__lock_acquire+0x2e/0x5020 [ 71.975434] 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 [ 71.994524] RSP: 0018:ffff8800fffffe70 EFLAGS: 00010082 [ 71.999880] RAX: 0000000000000000 RBX: 1ffff1002000004b RCX: 0000000000000002 [ 72.007138] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff88f92620 [ 72.014403] RBP: ffff880100000200 R08: 0000000000000000 R09: 0000000000000000 [ 72.021660] R10: ffff8801a942fbe0 R11: ffff8801d85baabb R12: 0000000000000000 [ 72.028918] R13: ffffffff88f92620 R14: ffff8801d85ba340 R15: 0000000000000002 [ 72.036183] WARNING: kernel stack regs at (____ptrval____) in syz-executor356:5462 has bad 'bp' value (____ptrval____) [ 72.036191] unwind stack type:0 next_sp:(____ptrval____) mask:0x20 graph_idx:0 [ 72.036203] (____ptrval____): fffffe0000039d78 (0xfffffe0000039d78) [ 72.036220] (____ptrval____): ffffffff812a9105 (show_trace_log_lvl+0x1f6/0x28c) [ 72.036232] (____ptrval____): ffffffff815ea86e (__lock_acquire+0x2e/0x5020) [ 72.036237] (____ptrval____): fffffe0000039fd8 (0xfffffe0000039fd8) [ 72.036241] (____ptrval____): 0000000000000020 (0x20) [ 72.036245] (____ptrval____): 0000000000000005 (0x5) [ 72.036250] (____ptrval____): fffffe0000038000 (0xfffffe0000038000) [ 72.036255] (____ptrval____): fffffe000003a000 (0xfffffe000003a000) [ 72.036259] (____ptrval____): ffff8800fffffe70 (0xffff8800fffffe70) [ 72.036262] (____ptrval____): 0000000000000000 ... [ 72.036267] (____ptrval____): fffffe0000038000 (0xfffffe0000038000) [ 72.036271] (____ptrval____): fffffe000003a000 (0xfffffe000003a000) [ 72.036276] (____ptrval____): ffff8800fffffe70 (0xffff8800fffffe70) [ 72.036280] (____ptrval____): 0000000000000020 (0x20) [ 72.036285] (____ptrval____): ffff8801d85ba340 (0xffff8801d85ba340) [ 72.036289] (____ptrval____): 0000010100000000 (0x10100000000) [ 72.036292] (____ptrval____): 0000000000000000 ... [ 72.036297] (____ptrval____): fffffe0000039ca8 (0xfffffe0000039ca8) [ 72.036304] (____ptrval____): ffffffff815ea86e (__lock_acquire+0x2e/0x5020) [ 72.036309] (____ptrval____): fffffe0000039f58 (0xfffffe0000039f58) [ 72.036314] (____ptrval____): e055df6e3b321c00 (0xe055df6e3b321c00) [ 72.036318] (____ptrval____): 0000000000000093 (0x93) [ 72.036320] (____ptrval____): 0000000000000000 ... [ 72.036329] (____ptrval____): ffffffff88f1b060 (pv_cpu_ops+0x120/0x120) [ 72.036333] (____ptrval____): 00000000ffffffff (0xffffffff) [ 72.036338] (____ptrval____): fffffe0000039d88 (0xfffffe0000039d88) [ 72.036345] (____ptrval____): ffffffff812a91d3 (show_stack+0x38/0x3a) [ 72.036350] (____ptrval____): fffffe0000039e38 (0xfffffe0000039e38) [ 72.036359] (____ptrval____): ffffffff878fb975 (dump_stack+0x1c9/0x2b4) [ 72.036364] (____ptrval____): fffffbfff11e360c (0xfffffbfff11e360c) [ 72.036368] (____ptrval____): dffffc0000000000 (0xdffffc0000000000) [ 72.036373] (____ptrval____): 1fffffc0000073b6 (0x1fffffc0000073b6) [ 72.036377] (____ptrval____): 0000000041b58ab3 (0x41b58ab3) [ 72.036386] (____ptrval____): ffffffff88bd7954 (regoff.33338+0x3696d4/0x37c210) [ 72.036393] (____ptrval____): ffffffff878fb7ac (dump_stack_print_info.cold.2+0x52/0x52) [ 72.036397] (____ptrval____): fffffe0000039df8 (0xfffffe0000039df8) [ 72.036400] (____ptrval____): 0000000000000000 ... [ 72.036404] (____ptrval____): fffffe0000039e40 (0xfffffe0000039e40) [ 72.036409] (____ptrval____): ffff880100000000 (0xffff880100000000) [ 72.036414] (____ptrval____): fffffe0000039e18 (0xfffffe0000039e18) [ 72.036419] (____ptrval____): e055df6e3b321c00 (0xe055df6e3b321c00) [ 72.036423] (____ptrval____): ffff880100000000 (0xffff880100000000) [ 72.036432] (____ptrval____): ffffffff89e74d60 (buf.37263+0x40/0x40) [ 72.036437] (____ptrval____): e055df6e3b321c00 (0xe055df6e3b321c00) [ 72.036439] (____ptrval____): 0000000000000000 ... [ 72.036449] (____ptrval____): ffffffff87e742e0 (hpet_msi_domain_info+0xe40/0x1a80) [ 72.036453] (____ptrval____): 0000000000000001 (0x1) [ 72.036456] (____ptrval____): 0000000000000000 ... [ 72.036460] (____ptrval____): fffffe0000039f00 (0xfffffe0000039f00) [ 72.036469] (____ptrval____): ffffffff81473ab9 (panic+0x238/0x4e7) [ 72.036474] (____ptrval____): 0000000041b58ab3 (0x41b58ab3) [ 72.036481] (____ptrval____): ffffffff88bed9cc (K512_4+0x130c/0x120f84) [ 72.036488] (____ptrval____): ffffffff81473881 (add_taint.cold.5+0x16/0x16) [ 72.036491] (____ptrval____): 0000000000000000 ... [ 72.036495] (____ptrval____): 0000000000000008 (0x8) [ 72.036499] (____ptrval____): fffffe0000039f10 (0xfffffe0000039f10) [ 72.036504] (____ptrval____): fffffe0000039ea8 (0xfffffe0000039ea8) [ 72.036506] (____ptrval____): 0000000000000000 ... [ 72.036511] (____ptrval____): ffff8801d85ba340 (0xffff8801d85ba340) [ 72.036515] (____ptrval____): 0000010000000000 (0x10000000000) [ 72.036518] (____ptrval____): 0000000000000000 ... [ 72.036522] (____ptrval____): e055df6e3b321c00 (0xe055df6e3b321c00) [ 72.036525] (____ptrval____): 0000000000000000 ... [ 72.036533] (____ptrval____): ffffffff8137bfcc (get_cpu_entry_area+0xc/0x30) [ 72.036537] (____ptrval____): fffffe0000033000 (0xfffffe0000033000) [ 72.036541] (____ptrval____): 0000000000000004 (0x4) [ 72.036545] (____ptrval____): 000000000001ede0 (0x1ede0) [ 72.036550] (____ptrval____): fffffe0000039e60 (0xfffffe0000039e60) [ 72.036555] (____ptrval____): fffffe0000039f58 (0xfffffe0000039f58) [ 72.036557] (____ptrval____): 0000000000000000 ... [ 72.036564] (____ptrval____): ffffffff87e4a580 (__func__.44285+0x40/0x40) [ 72.036568] (____ptrval____): ffff8800fffffe70 (0xffff8800fffffe70) [ 72.036571] (____ptrval____): 0000000000000000 ... [ 72.036575] (____ptrval____): fffffe0000039f18 (0xfffffe0000039f18) [ 72.036582] (____ptrval____): ffffffff813470df (df_debug+0x2d/0x2e) [ 72.036586] (____ptrval____): fffffe0000039f58 (0xfffffe0000039f58) [ 72.036591] (____ptrval____): fffffe0000039f48 (0xfffffe0000039f48) [ 72.036597] (____ptrval____): ffffffff8129c1f3 (do_double_fault+0x113/0x200) [ 72.036601] (____ptrval____): 0000000000000001 (0x1) [ 72.036604] (____ptrval____): 0000000000000000 ... [ 72.036608] (____ptrval____): fffffe0000039f59 (0xfffffe0000039f59) [ 72.036617] (____ptrval____): ffffffff87a00bd3 (double_fault+0x23/0x30) [ 72.036621] (____ptrval____): 0000000000000002 (0x2) [ 72.036625] (____ptrval____): ffff8801d85ba340 (0xffff8801d85ba340) [ 72.036634] (____ptrval____): ffffffff88f92620 (rcu_bh_lock_map+0x40/0x40) [ 72.036636] (____ptrval____): 0000000000000000 ... [ 72.036641] (____ptrval____): ffff880100000200 (0xffff880100000200) [ 72.036645] (____ptrval____): 1ffff1002000004b (0x1ffff1002000004b) [ 72.036650] (____ptrval____): ffff8801d85baabb (0xffff8801d85baabb) [ 72.036654] (____ptrval____): ffff8801a942fbe0 (0xffff8801a942fbe0) [ 72.036657] (____ptrval____): 0000000000000000 ... [ 72.036661] (____ptrval____): 0000000000000002 (0x2) [ 72.036663] (____ptrval____): 0000000000000000 ... [ 72.036674] (____ptrval____): ffffffff88f92620 (rcu_bh_lock_map+0x40/0x40) [ 72.036679] (____ptrval____): ffffffffffffffff (0xffffffffffffffff) [ 72.036687] (____ptrval____): ffffffff815ea86e (__lock_acquire+0x2e/0x5020) [ 72.036691] (____ptrval____): 0000000000000010 (0x10) [ 72.036695] (____ptrval____): 0000000000010082 (0x10082) [ 72.036699] (____ptrval____): ffff8800fffffe70 (0xffff8800fffffe70) [ 72.036703] (____ptrval____): 0000000000000018 (0x18) [ 72.036707] [ 72.666206] Dumping ftrace buffer: [ 72.669726] (ftrace buffer empty) [ 72.673412] Kernel Offset: disabled [ 72.677014] Rebooting in 86400 seconds..