[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.813422] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.606485] random: sshd: uninitialized urandom read (32 bytes read) [ 22.917296] random: sshd: uninitialized urandom read (32 bytes read) [ 23.749252] random: sshd: uninitialized urandom read (32 bytes read) [ 23.902754] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.51' (ECDSA) to the list of known hosts. [ 29.441725] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program executing program [ 29.539297] 9pnet: Insufficient options for proto=fd executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 29.913941] list_del corruption, ffff8801af8d3828->next is LIST_POISON1 (dead000000000100) [ 29.922827] ------------[ cut here ]------------ [ 29.927586] kernel BUG at lib/list_debug.c:47! [ 29.932210] invalid opcode: 0000 [#1] SMP KASAN [ 29.936883] CPU: 1 PID: 4681 Comm: syz-executor563 Not tainted 4.18.0-rc4+ #41 [ 29.944225] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.953571] RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x58 executing program executing program executing program executing program executing program executing program [ 29.959438] 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 [ 29.978577] RSP: 0018:ffff8801d8c6f180 EFLAGS: 00010286 [ 29.983924] RAX: 000000000000004e RBX: ffff8801af8d3828 RCX: 0000000000000000 [ 29.991178] RDX: 0000000000000000 RSI: ffffffff81631821 RDI: 0000000000000001 [ 29.998446] RBP: ffff8801d8c6f198 R08: ffff8801ace46180 R09: ffffed003b5e4fc0 [ 30.005710] R10: ffffed003b5e4fc0 R11: ffff8801daf27e07 R12: dead000000000200 executing program executing program executing program executing program executing program [ 30.012978] R13: dead000000000100 R14: ffff8801af8d3828 R15: ffff8801af8d3830 [ 30.020232] FS: 0000000000000000(0000) GS:ffff8801daf00000(0063) knlGS:00000000f7ff8b40 [ 30.028447] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 30.034323] CR2: 0000000020000040 CR3: 00000001d90da000 CR4: 00000000001406e0 [ 30.041580] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.048922] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.056169] Call Trace: [ 30.058744] p9_fd_cancel+0x104/0x360 executing program [ 30.062526] ? p9_fd_close+0x5b0/0x5b0 [ 30.066399] ? p9_pollwait+0x83/0x230 [ 30.070195] p9_client_rpc+0xf1f/0x1400 [ 30.074167] ? p9_client_prepare_req.part.8+0xcd0/0xcd0 [ 30.079524] ? __fget+0x414/0x670 [ 30.082988] ? rcu_is_watching+0x61/0x150 [ 30.087134] ? expand_files.part.8+0x9c0/0x9c0 [ 30.091703] ? finish_wait+0x430/0x430 [ 30.095586] ? rcu_read_lock_sched_held+0x108/0x120 [ 30.100601] ? p9_fd_show_options+0x1c0/0x1c0 [ 30.105089] ? lockdep_init_map+0x9/0x10 [ 30.109134] p9_client_create+0xd09/0x16c9 executing program executing program executing program executing program executing program [ 30.113367] ? p9_client_read+0xc60/0xc60 [ 30.117504] ? find_held_lock+0x36/0x1c0 [ 30.121553] ? __lockdep_init_map+0x105/0x590 [ 30.126042] ? kasan_check_write+0x14/0x20 [ 30.130269] ? __init_rwsem+0x1cc/0x2a0 [ 30.134228] ? do_raw_write_unlock.cold.8+0x49/0x49 [ 30.139243] ? rcu_read_lock_sched_held+0x108/0x120 [ 30.144247] ? __kmalloc_track_caller+0x5f5/0x760 [ 30.149075] ? save_stack+0xa9/0xd0 [ 30.152683] ? save_stack+0x43/0xd0 [ 30.156308] ? kasan_kmalloc+0xc4/0xe0 [ 30.160189] ? memcpy+0x45/0x50 executing program executing program executing program executing program executing program [ 30.163464] v9fs_session_init+0x21a/0x1a80 [ 30.167774] ? find_held_lock+0x36/0x1c0 [ 30.171819] ? v9fs_show_options+0x7e0/0x7e0 [ 30.176211] ? kasan_check_read+0x11/0x20 [ 30.180351] ? rcu_is_watching+0x8c/0x150 [ 30.184484] ? rcu_pm_notify+0xc0/0xc0 [ 30.188348] ? rcu_pm_notify+0xc0/0xc0 [ 30.192224] ? v9fs_mount+0x61/0x900 [ 30.195934] ? rcu_read_lock_sched_held+0x108/0x120 [ 30.200942] ? kmem_cache_alloc_trace+0x616/0x780 [ 30.205783] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 30.211318] v9fs_mount+0x7c/0x900 executing program executing program executing program executing program executing program [ 30.215100] mount_fs+0xae/0x328 [ 30.218463] vfs_kern_mount.part.34+0xdc/0x4e0 [ 30.223033] ? may_umount+0xb0/0xb0 [ 30.226646] ? _raw_read_unlock+0x22/0x30 [ 30.233118] ? __get_fs_type+0x97/0xc0 [ 30.237001] do_mount+0x581/0x30e0 [ 30.240617] ? do_raw_spin_unlock+0xa7/0x2f0 [ 30.245049] ? copy_mount_string+0x40/0x40 [ 30.249270] ? copy_mount_options+0x5f/0x380 [ 30.253786] ? rcu_read_lock_sched_held+0x108/0x120 [ 30.258804] ? kmem_cache_alloc_trace+0x616/0x780 executing program executing program executing program [ 30.263634] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 30.269253] ? _copy_from_user+0xdf/0x150 [ 30.273387] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 30.278908] ? copy_mount_options+0x285/0x380 [ 30.283394] __ia32_compat_sys_mount+0x5d5/0x860 [ 30.288135] do_fast_syscall_32+0x34d/0xfb2 [ 30.292444] ? do_int80_syscall_32+0x890/0x890 [ 30.297014] ? syscall_slow_exit_work+0x500/0x500 [ 30.301841] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 30.307360] ? syscall_return_slowpath+0x31d/0x5e0 executing program executing program executing program [ 30.312284] ? sysret32_from_system_call+0x5/0x46 [ 30.317109] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.321931] entry_SYSENTER_compat+0x70/0x7f [ 30.326321] RIP: 0023:0xf7ffccb9 [ 30.329661] 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 [ 30.348803] RSP: 002b:00000000f7ff81ec EFLAGS: 00000286 ORIG_RAX: 0000000000000015 [ 30.356611] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000020000000 executing program executing program executing program executing program [ 30.361053] 9pnet: Insufficient options for proto=fd [ 30.363875] RDX: 0000000020000380 RSI: 0000000000000000 RDI: 0000000020000240 [ 30.363880] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 [ 30.363885] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 30.363890] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 30.363897] Modules linked in: [ 30.363908] Dumping ftrace buffer: [ 30.363911] (ftrace buffer empty) [ 30.363963] ---[ end trace 5ef4a0d6d79e13aa ]--- executing program executing program executing program executing program executing program executing program executing program [ 30.413338] RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x58 [ 30.419221] 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 [ 30.438379] RSP: 0018:ffff8801d8c6f180 EFLAGS: 00010286 [ 30.443747] RAX: 000000000000004e RBX: ffff8801af8d3828 RCX: 0000000000000000 [ 30.451029] RDX: 0000000000000000 RSI: ffffffff81631821 RDI: 0000000000000001 [ 30.458310] RBP: ffff8801d8c6f198 R08: ffff8801ace46180 R09: ffffed003b5e4fc0 executing program executing program executing program executing program [ 30.465611] R10: ffffed003b5e4fc0 R11: ffff8801daf27e07 R12: dead000000000200 [ 30.472886] R13: dead000000000100 R14: ffff8801af8d3828 R15: ffff8801af8d3830 [ 30.480161] FS: 0000000000000000(0000) GS:ffff8801daf00000(0063) knlGS:00000000f7ff8b40 [ 30.488391] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 30.494286] CR2: 0000000020000040 CR3: 00000001d90da000 CR4: 00000000001406e0 [ 30.501556] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.508854] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 executing program [ 30.516127] Kernel panic - not syncing: Fatal exception [ 30.521886] Dumping ftrace buffer: [ 30.525428] (ftrace buffer empty) [ 30.529134] Kernel Offset: disabled [ 30.532741] Rebooting in 86400 seconds..