[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.712496] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 18.246179] random: sshd: uninitialized urandom read (32 bytes read) [ 18.572745] random: sshd: uninitialized urandom read (32 bytes read) [ 19.262282] random: sshd: uninitialized urandom read (32 bytes read) [ 34.302139] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.46' (ECDSA) to the list of known hosts. [ 39.730468] random: sshd: uninitialized urandom read (32 bytes read) [ 39.848648] IPVS: ftp: loaded support on port[0] = 21 [ 41.927431] PANIC: double fault, error_code: 0x0 [ 41.932236] CPU: 0 PID: 4525 Comm: syz-executor914 Not tainted 4.18.0-rc3+ #45 [ 41.939570] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.948915] RIP: 0010:__lock_acquire+0x2e/0x5020 [ 41.953640] 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 [ 41.972726] RSP: 0018:ffff8800fffffed0 EFLAGS: 00010082 [ 41.978067] RAX: 0000000000000000 RBX: 1ffff10020000057 RCX: 0000000000000002 [ 41.985354] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff88f92620 [ 41.992597] RBP: ffff880100000260 R08: 0000000000000000 R09: 0000000000000000 [ 41.999843] R10: ffff8801abdcf1b8 R11: ffff8801dae236b3 R12: 0000000000000000 [ 42.007089] R13: ffffffff88f92620 R14: ffff8801abee6280 R15: 0000000000000002 [ 42.014350] FS: 00007faa059f2700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 42.022560] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.028417] CR2: ffff8800fffffec8 CR3: 0000000008e6a000 CR4: 00000000001406f0 [ 42.035683] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.042927] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.050170] Call Trace: [ 42.052726] Kernel panic - not syncing: Machine halted. [ 42.058067] CPU: 0 PID: 4525 Comm: syz-executor914 Not tainted 4.18.0-rc3+ #45 [ 42.065399] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.074728] Call Trace: [ 42.077284] <#DF> [ 42.079444] dump_stack+0x1c9/0x2b4 [ 42.083063] ? dump_stack_print_info.cold.2+0x52/0x52 [ 42.088241] panic+0x238/0x4e7 [ 42.091415] ? add_taint.cold.5+0x16/0x16 [ 42.095548] ? get_cpu_entry_area+0xc/0x30 [ 42.099769] df_debug+0x2d/0x2e [ 42.103030] do_double_fault+0x113/0x200 [ 42.107073] double_fault+0x23/0x30 [ 42.110698] RIP: 0010:__lock_acquire+0x2e/0x5020 [ 42.115427] 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 [ 42.134557] RSP: 0018:ffff8800fffffed0 EFLAGS: 00010082 [ 42.139903] RAX: 0000000000000000 RBX: 1ffff10020000057 RCX: 0000000000000002 [ 42.147154] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff88f92620 [ 42.154415] RBP: ffff880100000260 R08: 0000000000000000 R09: 0000000000000000 [ 42.161667] R10: ffff8801abdcf1b8 R11: ffff8801dae236b3 R12: 0000000000000000 [ 42.168919] R13: ffffffff88f92620 R14: ffff8801abee6280 R15: 0000000000000002 [ 42.176180] WARNING: kernel stack regs at (____ptrval____) in syz-executor914:4525 has bad 'bp' value (____ptrval____) [ 42.176186] unwind stack type:0 next_sp:(____ptrval____) mask:0x20 graph_idx:0 [ 42.176199] (____ptrval____): fffffe0000008d78 (0xfffffe0000008d78) [ 42.176216] (____ptrval____): ffffffff812a9105 (show_trace_log_lvl+0x1f6/0x28c) [ 42.176236] (____ptrval____): ffffffff815ea86e (__lock_acquire+0x2e/0x5020) [ 42.176242] (____ptrval____): fffffe0000008fd8 (0xfffffe0000008fd8) [ 42.176248] (____ptrval____): 0000000000000020 (0x20) [ 42.176253] (____ptrval____): 0000000000000005 (0x5) [ 42.176259] (____ptrval____): fffffe0000007000 (0xfffffe0000007000) [ 42.176265] (____ptrval____): fffffe0000009000 (0xfffffe0000009000) [ 42.176274] (____ptrval____): ffff8800fffffed0 (0xffff8800fffffed0) [ 42.176278] (____ptrval____): 0000000000000000 ... [ 42.176284] (____ptrval____): fffffe0000007000 (0xfffffe0000007000) [ 42.176290] (____ptrval____): fffffe0000009000 (0xfffffe0000009000) [ 42.176299] (____ptrval____): ffff8800fffffed0 (0xffff8800fffffed0) [ 42.176304] (____ptrval____): 0000000000000020 (0x20) [ 42.176310] (____ptrval____): ffff8801abee6280 (0xffff8801abee6280) [ 42.176316] (____ptrval____): 0000010100000000 (0x10100000000) [ 42.176320] (____ptrval____): 0000000000000000 ... [ 42.176326] (____ptrval____): fffffe0000008ca8 (0xfffffe0000008ca8) [ 42.176337] (____ptrval____): ffffffff815ea86e (__lock_acquire+0x2e/0x5020) [ 42.176343] (____ptrval____): fffffe0000008f58 (0xfffffe0000008f58) [ 42.176351] (____ptrval____): 6d6a6dbe3db67300 (0x6d6a6dbe3db67300) [ 42.176357] (____ptrval____): 0000000000000093 (0x93) [ 42.176360] (____ptrval____): 0000000000000000 ... [ 42.176374] (____ptrval____): ffffffff88f1b060 (pv_cpu_ops+0x120/0x120) [ 42.176380] (____ptrval____): 00000000ffffffff (0xffffffff) [ 42.176386] (____ptrval____): fffffe0000008d88 (0xfffffe0000008d88) [ 42.176395] (____ptrval____): ffffffff812a91d3 (show_stack+0x38/0x3a) [ 42.176402] (____ptrval____): fffffe0000008e38 (0xfffffe0000008e38) [ 42.176413] (____ptrval____): ffffffff878ce585 (dump_stack+0x1c9/0x2b4) [ 42.176419] (____ptrval____): fffffbfff11e360c (0xfffffbfff11e360c) [ 42.176426] (____ptrval____): dffffc0000000000 (0xdffffc0000000000) [ 42.176432] (____ptrval____): 1fffffc0000011b6 (0x1fffffc0000011b6) [ 42.176438] (____ptrval____): 0000000041b58ab3 (0x41b58ab3) [ 42.176450] (____ptrval____): ffffffff88bd4364 (regoff.33333+0x368824/0x37b360) [ 42.176461] (____ptrval____): ffffffff878ce3bc (dump_stack_print_info.cold.2+0x52/0x52) [ 42.176467] (____ptrval____): fffffe0000008df8 (0xfffffe0000008df8) [ 42.176470] (____ptrval____): 0000000000000000 ... [ 42.176477] (____ptrval____): fffffe0000008e40 (0xfffffe0000008e40) [ 42.176483] (____ptrval____): ffff880100000000 (0xffff880100000000) [ 42.176489] (____ptrval____): fffffe0000008e18 (0xfffffe0000008e18) [ 42.176496] (____ptrval____): 6d6a6dbe3db67300 (0x6d6a6dbe3db67300) [ 42.176502] (____ptrval____): ffff880100000000 (0xffff880100000000) [ 42.176513] (____ptrval____): ffffffff89e71d60 (buf.37258+0x40/0x40) [ 42.176520] (____ptrval____): 6d6a6dbe3db67300 (0x6d6a6dbe3db67300) [ 42.176523] (____ptrval____): 0000000000000000 ... [ 42.176533] (____ptrval____): ffffffff87e742a0 (hpet_msi_domain_info+0xe40/0x1a80) [ 42.176537] (____ptrval____): 0000000000000000 ... [ 42.176543] (____ptrval____): fffffe0000008f00 (0xfffffe0000008f00) [ 42.176553] (____ptrval____): ffffffff81473ab9 (panic+0x238/0x4e7) [ 42.176559] (____ptrval____): 0000000041b58ab3 (0x41b58ab3) [ 42.176567] (____ptrval____): ffffffff88bea3cc (K512_4+0x130c/0x120734) [ 42.176578] (____ptrval____): ffffffff81473881 (add_taint.cold.5+0x16/0x16) [ 42.176581] (____ptrval____): 0000000000000000 ... [ 42.176586] (____ptrval____): 0000000000000008 (0x8) [ 42.176592] (____ptrval____): fffffe0000008f10 (0xfffffe0000008f10) [ 42.176598] (____ptrval____): fffffe0000008ea8 (0xfffffe0000008ea8) [ 42.176602] (____ptrval____): 0000000000000000 ... [ 42.176608] (____ptrval____): ffff8801abee6280 (0xffff8801abee6280) [ 42.176614] (____ptrval____): 0000010000000000 (0x10000000000) [ 42.176617] (____ptrval____): 0000000000000000 ... [ 42.176623] (____ptrval____): 6d6a6dbe3db67300 (0x6d6a6dbe3db67300) [ 42.176628] (____ptrval____): 0000000000000000 ... [ 42.176638] (____ptrval____): ffffffff8137bfcc (get_cpu_entry_area+0xc/0x30) [ 42.176645] (____ptrval____): fffffe0000002000 (0xfffffe0000002000) [ 42.176650] (____ptrval____): 0000000000000004 (0x4) [ 42.176655] (____ptrval____): 000000000001ede0 (0x1ede0) [ 42.176662] (____ptrval____): fffffe0000008e60 (0xfffffe0000008e60) [ 42.176668] (____ptrval____): fffffe0000008f58 (0xfffffe0000008f58) [ 42.176671] (____ptrval____): 0000000000000000 ... [ 42.176682] (____ptrval____): ffffffff87e4a540 (__func__.44280+0x40/0x40) [ 42.176688] (____ptrval____): ffff8800fffffed0 (0xffff8800fffffed0) [ 42.176691] (____ptrval____): 0000000000000000 ... [ 42.176697] (____ptrval____): fffffe0000008f18 (0xfffffe0000008f18) [ 42.176706] (____ptrval____): ffffffff813470df (df_debug+0x2d/0x2e) [ 42.176712] (____ptrval____): fffffe0000008f58 (0xfffffe0000008f58) [ 42.176718] (____ptrval____): fffffe0000008f48 (0xfffffe0000008f48) [ 42.176727] (____ptrval____): ffffffff8129c1f3 (do_double_fault+0x113/0x200) [ 42.176733] (____ptrval____): 0000000000000001 (0x1) [ 42.176736] (____ptrval____): 0000000000000000 ... [ 42.176742] (____ptrval____): fffffe0000008f59 (0xfffffe0000008f59) [ 42.176751] (____ptrval____): ffffffff87a00bd3 (double_fault+0x23/0x30) [ 42.176756] (____ptrval____): 0000000000000002 (0x2) [ 42.176762] (____ptrval____): ffff8801abee6280 (0xffff8801abee6280) [ 42.176774] (____ptrval____): ffffffff88f92620 (rcu_bh_lock_map+0x40/0x40) [ 42.176777] (____ptrval____): 0000000000000000 ... [ 42.176783] (____ptrval____): ffff880100000260 (0xffff880100000260) [ 42.176790] (____ptrval____): 1ffff10020000057 (0x1ffff10020000057) [ 42.176796] (____ptrval____): ffff8801dae236b3 (0xffff8801dae236b3) [ 42.176802] (____ptrval____): ffff8801abdcf1b8 (0xffff8801abdcf1b8) [ 42.176805] (____ptrval____): 0000000000000000 ... [ 42.176811] (____ptrval____): 0000000000000002 (0x2) [ 42.176814] (____ptrval____): 0000000000000000 ... [ 42.176824] (____ptrval____): ffffffff88f92620 (rcu_bh_lock_map+0x40/0x40) [ 42.176830] (____ptrval____): ffffffffffffffff (0xffffffffffffffff) [ 42.176841] (____ptrval____): ffffffff815ea86e (__lock_acquire+0x2e/0x5020) [ 42.176846] (____ptrval____): 0000000000000010 (0x10) [ 42.176851] (____ptrval____): 0000000000010082 (0x10082) [ 42.176857] (____ptrval____): ffff8800fffffed0 (0xffff8800fffffed0) [ 42.176863] (____ptrval____): 0000000000000018 (0x18) [ 42.176866] [ 43.884186] Shutting down cpus with NMI [ 43.888727] Dumping ftrace buffer: [ 43.892246] (ftrace buffer empty) [ 43.895930] Kernel Offset: disabled [ 43.899629] Rebooting in 86400 seconds..