[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 17.613532] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 18.735220] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 18.937135] random: sshd: uninitialized urandom read (32 bytes read) [ 19.816566] random: sshd: uninitialized urandom read (32 bytes read) [ 400.346250] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.4' (ECDSA) to the list of known hosts. [ 405.824368] 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 [ 409.646458] kasan: CONFIG_KASAN_INLINE enabled [ 409.651077] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 409.658462] general protection fault: 0000 [#1] SMP KASAN [ 409.663982] CPU: 0 PID: 4516 Comm: syz-executor752 Not tainted 4.18.0-rc5+ #153 [ 409.671405] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 409.680798] RIP: 0010:__lock_acquire+0x245/0x5020 executing program [ 409.685622] Code: 28 00 00 00 0f 85 03 34 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 <80> 3c 02 00 0f 85 c6 35 00 00 49 81 7d 00 60 86 e7 89 0f 84 42 ff [ 409.704727] RSP: 0018:ffff8801aef87540 EFLAGS: 00010002 [ 409.710070] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 409.717321] RDX: 0000000000000049 RSI: 0000000000000000 RDI: ffffffff88f1b0a0 [ 409.724571] RBP: ffff8801aef878c8 R08: 0000000000000001 R09: 0000000000000000 [ 409.731831] R10: ffffed003b5c46d6 R11: 0000000000000001 R12: 0000000000000000 [ 409.739083] R13: 0000000000000248 R14: ffff8801d97d8600 R15: 0000000000000000 executing program [ 409.746334] FS: 00007fa821770700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 409.754542] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 409.760418] CR2: 00007fffcacb7fac CR3: 00000001ce5b6000 CR4: 00000000001406f0 [ 409.767674] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 409.774928] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 409.782178] Call Trace: [ 409.784755] ? find_held_lock+0x36/0x1c0 [ 409.788818] ? trace_hardirqs_on+0x10/0x10 [ 409.793036] ? kasan_check_read+0x11/0x20 executing program executing program [ 409.797170] ? do_raw_spin_unlock+0xa7/0x2f0 [ 409.801562] ? __local_bh_enable_ip+0x161/0x230 [ 409.806224] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 409.811236] ? __sock_map_ctx_update_elem.isra.20+0x925/0x1530 [ 409.817193] ? trace_hardirqs_on+0xd/0x10 [ 409.821326] ? __local_bh_enable_ip+0x161/0x230 [ 409.826039] ? _raw_spin_unlock_bh+0x30/0x40 [ 409.830431] ? __sock_map_ctx_update_elem.isra.20+0x4ef/0x1530 [ 409.836386] ? sock_map_delete_elem+0x500/0x500 [ 409.841039] ? zap_class+0x740/0x740 executing program [ 409.844737] ? graph_lock+0x170/0x170 [ 409.848537] ? perf_trace_run_bpf_submit+0x269/0x3b0 [ 409.853643] lock_acquire+0x1e4/0x540 [ 409.857429] ? smap_list_map_remove+0x96/0x350 [ 409.861996] ? lock_release+0xa30/0xa30 [ 409.865947] ? lock_downgrade+0x8f0/0x8f0 [ 409.870075] ? graph_lock+0x170/0x170 [ 409.873860] ? rcu_is_watching+0x8c/0x150 [ 409.877996] _raw_spin_lock_bh+0x31/0x40 [ 409.882051] ? smap_list_map_remove+0x96/0x350 [ 409.886618] smap_list_map_remove+0x96/0x350 [ 409.891026] ? smap_tx_work+0xcd0/0xcd0 executing program [ 409.895004] sock_map_ctx_update_elem.isra.21+0x3ab/0x570 [ 409.900528] ? __sock_map_ctx_update_elem.isra.20+0x1530/0x1530 [ 409.906570] sock_map_update_elem+0x1b9/0x3b0 [ 409.911064] ? bpf_sock_map_update+0x60/0x60 [ 409.915462] ? kasan_check_read+0x11/0x20 [ 409.919592] ? rcu_is_watching+0x8c/0x150 [ 409.923732] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 409.928126] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 409.933672] ? bpf_sock_map_update+0x60/0x60 [ 409.938088] map_update_elem+0x5c4/0xc90 [ 409.942144] __x64_sys_bpf+0x32d/0x510 executing program [ 409.946029] ? bpf_prog_get+0x20/0x20 [ 409.949816] ? retint_kernel+0x10/0x10 [ 409.953695] ? do_syscall_64+0x9a/0x820 [ 409.957667] do_syscall_64+0x1b9/0x820 [ 409.961549] ? syscall_return_slowpath+0x5e0/0x5e0 [ 409.966469] ? syscall_return_slowpath+0x31d/0x5e0 [ 409.971390] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 409.976742] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 409.981571] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 409.986743] RIP: 0033:0x4457e9 executing program executing program [ 409.989910] Code: e8 3c b6 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 410.009033] RSP: 002b:00007fa82176fdb8 EFLAGS: 00000297 ORIG_RAX: 0000000000000141 [ 410.016758] RAX: ffffffffffffffda RBX: 00000000006dac3c RCX: 00000000004457e9 [ 410.024018] RDX: 0000000000000020 RSI: 0000000020000180 RDI: 0000000000000002 [ 410.031276] RBP: 00000000006dac38 R08: 0000000000000000 R09: 0000000000000000 [ 410.038549] R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000000 executing program [ 410.045822] R13: 00007ffe626c401f R14: 00007fa8217709c0 R15: 0000000000000007 [ 410.053094] Modules linked in: [ 410.056277] Dumping ftrace buffer: [ 410.060055] (ftrace buffer empty) [ 410.063932] ---[ end trace b3f376e4853d6d93 ]--- [ 410.068682] RIP: 0010:__lock_acquire+0x245/0x5020 [ 410.073524] Code: 28 00 00 00 0f 85 03 34 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 <80> 3c 02 00 0f 85 c6 35 00 00 49 81 7d 00 60 86 e7 89 0f 84 42 ff [ 410.092628] RSP: 0018:ffff8801aef87540 EFLAGS: 00010002 executing program [ 410.097999] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 410.105266] RDX: 0000000000000049 RSI: 0000000000000000 RDI: ffffffff88f1b0a0 [ 410.112541] RBP: ffff8801aef878c8 R08: 0000000000000001 R09: 0000000000000000 [ 410.119795] R10: ffffed003b5c46d6 R11: 0000000000000001 R12: 0000000000000000 [ 410.127055] R13: 0000000000000248 R14: ffff8801d97d8600 R15: 0000000000000000 [ 410.134319] FS: 00007fa821770700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 410.142526] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 executing program [ 410.148387] CR2: 00007fffcacb7fac CR3: 00000001ce5b6000 CR4: 00000000001406f0 [ 410.155643] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 410.162909] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 410.170161] Kernel panic - not syncing: Fatal exception in interrupt [ 410.177797] Dumping ftrace buffer: [ 410.181332] (ftrace buffer empty) [ 410.185027] Kernel Offset: disabled [ 410.188647] Rebooting in 86400 seconds..