[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.859418] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.154614] random: sshd: uninitialized urandom read (32 bytes read) [ 23.549542] random: sshd: uninitialized urandom read (32 bytes read) [ 24.416812] random: sshd: uninitialized urandom read (32 bytes read) [ 24.584606] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.29' (ECDSA) to the list of known hosts. [ 30.127339] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 31.331711] list_del corruption, ffff8801aa15b2a8->next is LIST_POISON1 (dead000000000100) [ 31.340585] ------------[ cut here ]------------ [ 31.345340] kernel BUG at lib/list_debug.c:47! [ 31.350006] invalid opcode: 0000 [#1] SMP KASAN [ 31.354778] CPU: 0 PID: 5039 Comm: syz-executor122 Not tainted 4.18.0-rc4+ #41 [ 31.362228] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.371617] RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x58 executing program executing program executing program executing program [ 31.377505] Code: 02 fe 0f 0b 4c 89 e2 48 89 de 48 c7 c7 a0 65 1a 88 e8 4a 6e 02 fe 0f 0b 4c 89 ea 48 89 de 48 c7 c7 40 65 1a 88 e8 36 6e 02 fe <0f> 0b 48 89 de 48 c7 c7 60 66 1a 88 e8 25 6e 02 fe 0f 0b 48 89 de [ 31.396659] RSP: 0018:ffff8801cfeef180 EFLAGS: 00010286 [ 31.402031] RAX: 000000000000004e RBX: ffff8801aa15b2a8 RCX: 0000000000000000 [ 31.409487] RDX: 0000000000000000 RSI: ffffffff81631821 RDI: 0000000000000001 [ 31.416779] RBP: ffff8801cfeef198 R08: ffff8801aac8e600 R09: ffffed003b5c4fc0 [ 31.424055] R10: ffffed003b5c4fc0 R11: ffff8801dae27e07 R12: dead000000000200 [ 31.431343] R13: dead000000000100 R14: ffff8801aa15b2a8 R15: ffff8801aa15b2b0 [ 31.438607] FS: 0000000000000000(0000) GS:ffff8801dae00000(0063) knlGS:00000000f7fe9b40 [ 31.447046] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 31.453020] CR2: 0000000020000000 CR3: 00000001d8066000 CR4: 00000000001406f0 [ 31.460311] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 31.467593] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 31.474885] Call Trace: [ 31.477475] p9_fd_cancel+0x104/0x360 [ 31.481285] ? p9_fd_close+0x5b0/0x5b0 [ 31.485178] ? p9_pollwait+0x83/0x230 [ 31.488995] p9_client_rpc+0xf1f/0x1400 [ 31.492985] ? p9_client_prepare_req.part.8+0xcd0/0xcd0 [ 31.498348] ? __fget+0x414/0x670 [ 31.501806] ? rcu_is_watching+0x61/0x150 [ 31.505955] ? expand_files.part.8+0x9c0/0x9c0 [ 31.510536] ? finish_wait+0x430/0x430 [ 31.514443] ? rcu_read_lock_sched_held+0x108/0x120 [ 31.519471] ? p9_fd_show_options+0x1c0/0x1c0 [ 31.523969] ? lockdep_init_map+0x9/0x10 [ 31.528046] p9_client_create+0xd09/0x16c9 [ 31.532300] ? p9_client_read+0xc60/0xc60 [ 31.536455] ? find_held_lock+0x36/0x1c0 [ 31.540529] ? __lockdep_init_map+0x105/0x590 [ 31.545041] ? kasan_check_write+0x14/0x20 [ 31.549280] ? __init_rwsem+0x1cc/0x2a0 [ 31.553256] ? do_raw_write_unlock.cold.8+0x49/0x49 [ 31.558397] ? rcu_read_lock_sched_held+0x108/0x120 [ 31.563425] ? __kmalloc_track_caller+0x5f5/0x760 [ 31.568281] ? save_stack+0xa9/0xd0 [ 31.571937] ? save_stack+0x43/0xd0 [ 31.575569] ? kasan_kmalloc+0xc4/0xe0 [ 31.579443] ? memcpy+0x45/0x50 [ 31.582724] v9fs_session_init+0x21a/0x1a80 [ 31.587070] ? find_held_lock+0x36/0x1c0 [ 31.591121] ? v9fs_show_options+0x7e0/0x7e0 [ 31.595533] ? kasan_check_read+0x11/0x20 [ 31.599702] ? rcu_is_watching+0x8c/0x150 [ 31.603867] ? rcu_pm_notify+0xc0/0xc0 [ 31.607776] ? rcu_pm_notify+0xc0/0xc0 [ 31.611656] ? v9fs_mount+0x61/0x900 [ 31.615367] ? rcu_read_lock_sched_held+0x108/0x120 [ 31.620396] ? kmem_cache_alloc_trace+0x616/0x780 [ 31.625232] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 31.630929] v9fs_mount+0x7c/0x900 [ 31.634481] mount_fs+0xae/0x328 [ 31.637871] vfs_kern_mount.part.34+0xdc/0x4e0 [ 31.642558] ? may_umount+0xb0/0xb0 [ 31.646180] ? _raw_read_unlock+0x22/0x30 [ 31.651281] ? __get_fs_type+0x97/0xc0 [ 31.655172] do_mount+0x581/0x30e0 [ 31.658700] ? copy_mount_string+0x40/0x40 [ 31.662946] ? copy_mount_options+0x5f/0x380 [ 31.667358] ? rcu_read_lock_sched_held+0x108/0x120 [ 31.672594] ? kmem_cache_alloc_trace+0x616/0x780 [ 31.677438] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 31.682990] ? _copy_from_user+0xdf/0x150 [ 31.687140] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 31.692664] ? copy_mount_options+0x285/0x380 [ 31.697158] __ia32_compat_sys_mount+0x5d5/0x860 [ 31.701907] do_fast_syscall_32+0x34d/0xfb2 [ 31.706225] ? do_int80_syscall_32+0x890/0x890 [ 31.710830] ? _raw_spin_unlock_irq+0x27/0x70 [ 31.715330] ? finish_task_switch+0x1d3/0x870 [ 31.719821] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 31.725352] ? syscall_return_slowpath+0x31d/0x5e0 [ 31.730270] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 31.735794] ? retint_user+0x18/0x18 [ 31.739496] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.744365] entry_SYSENTER_compat+0x70/0x7f [ 31.748777] RIP: 0023:0xf7fedcb9 [ 31.752132] Code: 55 08 8b 88 64 cd ff ff 8b 98 68 cd ff ff 89 c8 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 1c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 31.771416] RSP: 002b:00000000f7fe91ec EFLAGS: 00000286 ORIG_RAX: 0000000000000015 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 31.779201] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000020002d00 [ 31.786474] RDX: 0000000020002d40 RSI: 0000000000200000 RDI: 0000000020002d80 [ 31.793764] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 [ 31.801032] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 31.808302] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 31.815563] Modules linked in: [ 31.818755] Dumping ftrace buffer: [ 31.822285] (ftrace buffer empty) [ 31.826094] ---[ end trace 240dd2352208d421 ]--- [ 31.830893] RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x58 [ 31.836814] Code: 02 fe 0f 0b 4c 89 e2 48 89 de 48 c7 c7 a0 65 1a 88 e8 4a 6e 02 fe 0f 0b 4c 89 ea 48 89 de 48 c7 c7 40 65 1a 88 e8 36 6e 02 fe <0f> 0b 48 89 de 48 c7 c7 60 66 1a 88 e8 25 6e 02 fe 0f 0b 48 89 de [ 31.856404] RSP: 0018:ffff8801cfeef180 EFLAGS: 00010286 [ 31.861824] RAX: 000000000000004e RBX: ffff8801aa15b2a8 RCX: 0000000000000000 [ 31.869248] RDX: 0000000000000000 RSI: ffffffff81631821 RDI: 0000000000000001 [ 31.876819] RBP: ffff8801cfeef198 R08: ffff8801aac8e600 R09: ffffed003b5c4fc0 [ 31.884125] R10: ffffed003b5c4fc0 R11: ffff8801dae27e07 R12: dead000000000200 [ 31.891433] R13: dead000000000100 R14: ffff8801aa15b2a8 R15: ffff8801aa15b2b0 [ 31.898749] FS: 0000000000000000(0000) GS:ffff8801dae00000(0063) knlGS:00000000f7fe9b40 [ 31.907016] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 31.912951] CR2: 0000000020000000 CR3: 00000001d8066000 CR4: 00000000001406f0 [ 31.920266] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 31.927582] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 31.934885] Kernel panic - not syncing: Fatal exception [ 31.940806] Dumping ftrace buffer: [ 31.944339] (ftrace buffer empty) [ 31.948030] Kernel Offset: disabled [ 31.951639] Rebooting in 86400 seconds..