[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 13.730329] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 18.174940] random: sshd: uninitialized urandom read (32 bytes read) [ 18.468213] random: sshd: uninitialized urandom read (32 bytes read) [ 19.100661] random: sshd: uninitialized urandom read (32 bytes read) [ 163.758853] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.25' (ECDSA) to the list of known hosts. [ 169.210083] random: sshd: uninitialized urandom read (32 bytes read) [ 194.132831] PANIC: double fault, error_code: 0x0 [ 194.137614] CPU: 0 PID: 19409 Comm: syz-executor839 Not tainted 4.18.0-rc3+ #45 [ 194.145037] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 194.154378] RIP: 0010:__lock_acquire+0x2e/0x5020 [ 194.159106] 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 [ 194.178192] RSP: 0018:ffff8801b4c34e70 EFLAGS: 00010082 [ 194.183531] RAX: 0000000000000000 RBX: 1ffff10036986a4b RCX: 0000000000000002 [ 194.190775] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff88f92620 [ 194.198028] RBP: ffff8801b4c35200 R08: 0000000000000000 R09: 0000000000000000 [ 194.205283] R10: ffff8801b552f1b8 R11: ffff8801dae236b3 R12: 0000000000000000 [ 194.212529] R13: ffffffff88f92620 R14: ffff8801bae1e0c0 R15: 0000000000000002 [ 194.219777] FS: 00007fb517264700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 194.227977] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 194.233834] CR2: ffff8801b4c34e68 CR3: 0000000008e6a000 CR4: 00000000001406f0 [ 194.241083] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 194.248340] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 194.255586] Call Trace: [ 194.258143] Kernel panic - not syncing: Machine halted. [ 194.263483] CPU: 0 PID: 19409 Comm: syz-executor839 Not tainted 4.18.0-rc3+ #45 [ 194.270901] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 194.280237] Call Trace: [ 194.282794] <#DF> [ 194.284928] dump_stack+0x1c9/0x2b4 [ 194.288536] ? dump_stack_print_info.cold.2+0x52/0x52 [ 194.293706] panic+0x238/0x4e7 [ 194.296875] ? add_taint.cold.5+0x16/0x16 [ 194.301016] ? get_cpu_entry_area+0xc/0x30 [ 194.305232] df_debug+0x2d/0x2e [ 194.308488] do_double_fault+0x113/0x200 [ 194.312527] double_fault+0x23/0x30 [ 194.316138] RIP: 0010:__lock_acquire+0x2e/0x5020 [ 194.320874] 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 [ 194.339982] RSP: 0018:ffff8801b4c34e70 EFLAGS: 00010082 [ 194.345328] RAX: 0000000000000000 RBX: 1ffff10036986a4b RCX: 0000000000000002 [ 194.352574] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff88f92620 [ 194.359818] RBP: ffff8801b4c35200 R08: 0000000000000000 R09: 0000000000000000 [ 194.367064] R10: ffff8801b552f1b8 R11: ffff8801dae236b3 R12: 0000000000000000 [ 194.374308] R13: ffffffff88f92620 R14: ffff8801bae1e0c0 R15: 0000000000000002 [ 194.381562] WARNING: kernel stack regs at (____ptrval____) in syz-executor839:19409 has bad 'bp' value (____ptrval____) [ 194.381567] unwind stack type:0 next_sp:(____ptrval____) mask:0x20 graph_idx:0 [ 194.381575] (____ptrval____): fffffe0000008d78 (0xfffffe0000008d78) [ 194.381587] (____ptrval____): ffffffff812a9105 (show_trace_log_lvl+0x1f6/0x28c) [ 194.381597] (____ptrval____): ffffffff815ea86e (__lock_acquire+0x2e/0x5020) [ 194.381602] (____ptrval____): fffffe0000008fd8 (0xfffffe0000008fd8) [ 194.381606] (____ptrval____): 0000000000000020 (0x20) [ 194.381610] (____ptrval____): 0000000000000005 (0x5) [ 194.381615] (____ptrval____): fffffe0000007000 (0xfffffe0000007000) [ 194.381620] (____ptrval____): fffffe0000009000 (0xfffffe0000009000) [ 194.381624] (____ptrval____): ffff8801b4c34e70 (0xffff8801b4c34e70) [ 194.381627] (____ptrval____): 0000000000000000 ... [ 194.381632] (____ptrval____): fffffe0000007000 (0xfffffe0000007000) [ 194.381636] (____ptrval____): fffffe0000009000 (0xfffffe0000009000) [ 194.381641] (____ptrval____): ffff8801b4c34e70 (0xffff8801b4c34e70) [ 194.381645] (____ptrval____): 0000000000000020 (0x20) [ 194.381649] (____ptrval____): ffff8801bae1e0c0 (0xffff8801bae1e0c0) [ 194.381654] (____ptrval____): 0000010100000000 (0x10100000000) [ 194.381656] (____ptrval____): 0000000000000000 ... [ 194.381661] (____ptrval____): fffffe0000008ca8 (0xfffffe0000008ca8) [ 194.381669] (____ptrval____): ffffffff815ea86e (__lock_acquire+0x2e/0x5020) [ 194.381673] (____ptrval____): fffffe0000008f58 (0xfffffe0000008f58) [ 194.381678] (____ptrval____): c2e2220740eeb600 (0xc2e2220740eeb600) [ 194.381682] (____ptrval____): 0000000000000093 (0x93) [ 194.381685] (____ptrval____): 0000000000000000 ... [ 194.381694] (____ptrval____): ffffffff88f1b060 (pv_cpu_ops+0x120/0x120) [ 194.381698] (____ptrval____): 00000000ffffffff (0xffffffff) [ 194.381703] (____ptrval____): fffffe0000008d88 (0xfffffe0000008d88) [ 194.381710] (____ptrval____): ffffffff812a91d3 (show_stack+0x38/0x3a) [ 194.381714] (____ptrval____): fffffe0000008e38 (0xfffffe0000008e38) [ 194.381724] (____ptrval____): ffffffff878ce585 (dump_stack+0x1c9/0x2b4) [ 194.381729] (____ptrval____): fffffbfff11e360c (0xfffffbfff11e360c) [ 194.381733] (____ptrval____): dffffc0000000000 (0xdffffc0000000000) [ 194.381738] (____ptrval____): 1fffffc0000011b6 (0x1fffffc0000011b6) [ 194.381742] (____ptrval____): 0000000041b58ab3 (0x41b58ab3) [ 194.381753] (____ptrval____): ffffffff88bd4364 (regoff.33333+0x368824/0x37b360) [ 194.381761] (____ptrval____): ffffffff878ce3bc (dump_stack_print_info.cold.2+0x52/0x52) [ 194.381766] (____ptrval____): fffffe0000008df8 (0xfffffe0000008df8) [ 194.381768] (____ptrval____): 0000000000000000 ... [ 194.381773] (____ptrval____): fffffe0000008e40 (0xfffffe0000008e40) [ 194.381777] (____ptrval____): ffff8801b4c35000 (0xffff8801b4c35000) [ 194.381782] (____ptrval____): fffffe0000008e18 (0xfffffe0000008e18) [ 194.381787] (____ptrval____): c2e2220740eeb600 (0xc2e2220740eeb600) [ 194.381791] (____ptrval____): ffff8801b4c35000 (0xffff8801b4c35000) [ 194.381800] (____ptrval____): ffffffff89e71d60 (buf.37258+0x40/0x40) [ 194.381805] (____ptrval____): c2e2220740eeb600 (0xc2e2220740eeb600) [ 194.381807] (____ptrval____): 0000000000000000 ... [ 194.381815] (____ptrval____): ffffffff87e742a0 (hpet_msi_domain_info+0xe40/0x1a80) [ 194.381818] (____ptrval____): 0000000000000000 ... [ 194.381823] (____ptrval____): fffffe0000008f00 (0xfffffe0000008f00) [ 194.381832] (____ptrval____): ffffffff81473ab9 (panic+0x238/0x4e7) [ 194.381836] (____ptrval____): 0000000041b58ab3 (0x41b58ab3) [ 194.381843] (____ptrval____): ffffffff88bea3cc (K512_4+0x130c/0x120734) [ 194.381851] (____ptrval____): ffffffff81473881 (add_taint.cold.5+0x16/0x16) [ 194.381853] (____ptrval____): 0000000000000000 ... [ 194.381857] (____ptrval____): 0000000000000008 (0x8) [ 194.381861] (____ptrval____): fffffe0000008f10 (0xfffffe0000008f10) [ 194.381866] (____ptrval____): fffffe0000008ea8 (0xfffffe0000008ea8) [ 194.381869] (____ptrval____): 0000000000000000 ... [ 194.381873] (____ptrval____): ffff8801bae1e0c0 (0xffff8801bae1e0c0) [ 194.381878] (____ptrval____): 0000010000000000 (0x10000000000) [ 194.381880] (____ptrval____): 0000000000000000 ... [ 194.381885] (____ptrval____): c2e2220740eeb600 (0xc2e2220740eeb600) [ 194.381887] (____ptrval____): 0000000000000000 ... [ 194.381895] (____ptrval____): ffffffff8137bfcc (get_cpu_entry_area+0xc/0x30) [ 194.381899] (____ptrval____): fffffe0000002000 (0xfffffe0000002000) [ 194.381903] (____ptrval____): 0000000000000004 (0x4) [ 194.381908] (____ptrval____): 000000000001ede0 (0x1ede0) [ 194.381912] (____ptrval____): fffffe0000008e60 (0xfffffe0000008e60) [ 194.381917] (____ptrval____): fffffe0000008f58 (0xfffffe0000008f58) [ 194.381919] (____ptrval____): 0000000000000000 ... [ 194.381927] (____ptrval____): ffffffff87e4a540 (__func__.44280+0x40/0x40) [ 194.381932] (____ptrval____): ffff8801b4c34e70 (0xffff8801b4c34e70) [ 194.381934] (____ptrval____): 0000000000000000 ... [ 194.381939] (____ptrval____): fffffe0000008f18 (0xfffffe0000008f18) [ 194.381946] (____ptrval____): ffffffff813470df (df_debug+0x2d/0x2e) [ 194.381951] (____ptrval____): fffffe0000008f58 (0xfffffe0000008f58) [ 194.381955] (____ptrval____): fffffe0000008f48 (0xfffffe0000008f48) [ 194.381963] (____ptrval____): ffffffff8129c1f3 (do_double_fault+0x113/0x200) [ 194.381967] (____ptrval____): 0000000000000001 (0x1) [ 194.381970] (____ptrval____): 0000000000000000 ... [ 194.381974] (____ptrval____): fffffe0000008f59 (0xfffffe0000008f59) [ 194.381982] (____ptrval____): ffffffff87a00bd3 (double_fault+0x23/0x30) [ 194.381986] (____ptrval____): 0000000000000002 (0x2) [ 194.381990] (____ptrval____): ffff8801bae1e0c0 (0xffff8801bae1e0c0) [ 194.382000] (____ptrval____): ffffffff88f92620 (rcu_bh_lock_map+0x40/0x40) [ 194.382004] (____ptrval____): 0000000000000000 ... [ 194.382012] (____ptrval____): ffff8801b4c35200 (0xffff8801b4c35200) [ 194.382020] (____ptrval____): 1ffff10036986a4b (0x1ffff10036986a4b) [ 194.382028] (____ptrval____): ffff8801dae236b3 (0xffff8801dae236b3) [ 194.382034] (____ptrval____): ffff8801b552f1b8 (0xffff8801b552f1b8) [ 194.382036] (____ptrval____): 0000000000000000 ... [ 194.382040] (____ptrval____): 0000000000000002 (0x2) [ 194.382043] (____ptrval____): 0000000000000000 ... [ 194.382050] (____ptrval____): ffffffff88f92620 (rcu_bh_lock_map+0x40/0x40) [ 194.382055] (____ptrval____): ffffffffffffffff (0xffffffffffffffff) [ 194.382062] (____ptrval____): ffffffff815ea86e (__lock_acquire+0x2e/0x5020) [ 194.382066] (____ptrval____): 0000000000000010 (0x10) [ 194.382070] (____ptrval____): 0000000000010082 (0x10082) [ 194.382075] (____ptrval____): ffff8801b4c34e70 (0xffff8801b4c34e70) [ 194.382079] (____ptrval____): 0000000000000018 (0x18) [ 194.382082] [ 195.004394] Dumping ftrace buffer: [ 195.007909] (ftrace buffer empty) [ 195.011603] Kernel Offset: disabled [ 195.015207] Rebooting in 86400 seconds..