[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.108' (ECDSA) to the list of known hosts. 2021/05/03 23:33:16 fuzzer started 2021/05/03 23:33:16 dialing manager at 10.128.0.169:34381 2021/05/03 23:33:17 syscalls: 3586 2021/05/03 23:33:17 code coverage: enabled 2021/05/03 23:33:17 comparison tracing: enabled 2021/05/03 23:33:17 extra coverage: enabled 2021/05/03 23:33:17 setuid sandbox: enabled 2021/05/03 23:33:17 namespace sandbox: enabled 2021/05/03 23:33:17 Android sandbox: /sys/fs/selinux/policy does not exist 2021/05/03 23:33:17 fault injection: enabled 2021/05/03 23:33:17 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2021/05/03 23:33:17 net packet injection: enabled 2021/05/03 23:33:17 net device setup: enabled 2021/05/03 23:33:17 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2021/05/03 23:33:17 devlink PCI setup: PCI device 0000:00:10.0 is not available 2021/05/03 23:33:17 USB emulation: enabled 2021/05/03 23:33:17 hci packet injection: enabled 2021/05/03 23:33:17 wifi device emulation: enabled 2021/05/03 23:33:17 802.15.4 emulation: enabled 2021/05/03 23:33:17 fetching corpus: 0, signal 0/2000 (executing program) 2021/05/03 23:33:17 fetching corpus: 50, signal 52904/56515 (executing program) 2021/05/03 23:33:17 fetching corpus: 100, signal 74352/79524 (executing program) 2021/05/03 23:33:17 fetching corpus: 150, signal 100635/107196 (executing program) 2021/05/03 23:33:17 fetching corpus: 200, signal 123461/131276 (executing program) 2021/05/03 23:33:17 fetching corpus: 250, signal 138347/147405 (executing program) syzkaller login: [ 72.443910][ T8453] ================================================================== [ 72.452258][ T8453] BUG: KASAN: wild-memory-access in copyout.part.0+0xd7/0x110 [ 72.459728][ T8453] Read of size 624 at addr 108548c01ac40010 by task syz-fuzzer/8453 [ 72.467695][ T8453] [ 72.470003][ T8453] CPU: 0 PID: 8453 Comm: syz-fuzzer Not tainted 5.12.0-rc8-next-20210423-syzkaller #0 [ 72.479547][ T8453] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.489593][ T8453] Call Trace: [ 72.492861][ T8453] dump_stack+0x141/0x1d7 [ 72.497205][ T8453] ? copyout.part.0+0xd7/0x110 [ 72.501954][ T8453] kasan_report.cold+0x5f/0xd8 [ 72.506723][ T8453] ? copyout.part.0+0xd7/0x110 [ 72.511757][ T8453] kasan_check_range+0x13d/0x180 [ 72.516701][ T8453] copyout.part.0+0xd7/0x110 [ 72.521279][ T8453] _copy_to_iter+0x2b4/0x1850 [ 72.525955][ T8453] ? lock_chain_count+0x20/0x20 [ 72.530805][ T8453] ? ip_local_deliver_finish+0x240/0x370 [ 72.536480][ T8453] ? _copy_from_iter_nocache+0x1440/0x1440 [ 72.542388][ T8453] ? ip_local_deliver+0x195/0x200 [ 72.547408][ T8453] ? ip_sublist_rcv_finish+0x9a/0x2c0 [ 72.552777][ T8453] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 72.559045][ T8453] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 72.564777][ T8453] ? __virt_addr_valid+0x5d/0x2d0 [ 72.569812][ T8453] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 72.576183][ T8453] ? __phys_addr_symbol+0x2c/0x70 [ 72.581210][ T8453] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 72.586917][ T8453] ? __check_object_size+0x18a/0x3f0 [ 72.592209][ T8453] simple_copy_to_iter+0x4c/0x70 [ 72.597135][ T8453] __skb_datagram_iter+0x4a7/0x770 [ 72.602234][ T8453] ? zerocopy_sg_from_iter+0x110/0x110 [ 72.607681][ T8453] skb_copy_datagram_iter+0x40/0x50 [ 72.613181][ T8453] tcp_recvmsg_locked+0x1048/0x22f0 [ 72.618414][ T8453] ? tcp_splice_read+0x8b0/0x8b0 [ 72.623354][ T8453] ? mark_held_locks+0x9f/0xe0 [ 72.628116][ T8453] ? __local_bh_enable_ip+0xa0/0x120 [ 72.633397][ T8453] tcp_recvmsg+0x134/0x550 [ 72.637851][ T8453] ? tcp_recvmsg_locked+0x22f0/0x22f0 [ 72.643222][ T8453] ? aa_sk_perm+0x311/0xab0 [ 72.647714][ T8453] inet_recvmsg+0x11b/0x5e0 [ 72.652214][ T8453] ? inet_sendpage+0x140/0x140 [ 72.656972][ T8453] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 72.663200][ T8453] ? security_socket_recvmsg+0x8f/0xc0 [ 72.668649][ T8453] sock_read_iter+0x33c/0x470 [ 72.673338][ T8453] ? ____sys_recvmsg+0x600/0x600 [ 72.678288][ T8453] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 72.684527][ T8453] ? fsnotify+0xa58/0x1060 [ 72.688956][ T8453] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 72.695197][ T8453] new_sync_read+0x5b7/0x6e0 [ 72.699782][ T8453] ? ksys_lseek+0x1b0/0x1b0 [ 72.704284][ T8453] vfs_read+0x35c/0x570 [ 72.708426][ T8453] ksys_read+0x1ee/0x250 [ 72.712653][ T8453] ? vfs_write+0xa40/0xa40 [ 72.717056][ T8453] ? syscall_enter_from_user_mode+0x27/0x70 [ 72.722958][ T8453] do_syscall_64+0x3a/0xb0 [ 72.727377][ T8453] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 72.733256][ T8453] RIP: 0033:0x4af19b [ 72.737146][ T8453] Code: fb ff eb bd e8 a6 b6 fb ff e9 61 ff ff ff cc e8 9b 82 fb ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 72.756849][ T8453] RSP: 002b:000000c0000ab850 EFLAGS: 00000206 ORIG_RAX: 0000000000000000 [ 72.765273][ T8453] RAX: ffffffffffffffda RBX: 000000c00001e800 RCX: 00000000004af19b [ 72.773247][ T8453] RDX: 0000000000001000 RSI: 000000c000078000 RDI: 0000000000000006 [ 72.781205][ T8453] RBP: 000000c0000ab8a0 R08: 0000000000000001 R09: 0000000000000002 [ 72.789158][ T8453] R10: 0000000000002774 R11: 0000000000000206 R12: 0000000000002770 [ 72.797113][ T8453] R13: 0000000000000200 R14: 0000000000000002 R15: 0000000000000002 [ 72.805081][ T8453] ================================================================== [ 72.813122][ T8453] Disabling lock debugging due to kernel taint [ 72.820633][ T8453] Kernel panic - not syncing: panic_on_warn set ... [ 72.827227][ T8453] CPU: 0 PID: 8453 Comm: syz-fuzzer Tainted: G B 5.12.0-rc8-next-20210423-syzkaller #0 [ 72.838165][ T8453] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.848203][ T8453] Call Trace: [ 72.851476][ T8453] dump_stack+0x141/0x1d7 [ 72.855810][ T8453] panic+0x306/0x73d [ 72.859691][ T8453] ? __warn_printk+0xf3/0xf3 [ 72.864279][ T8453] ? preempt_schedule_common+0x59/0xc0 [ 72.869725][ T8453] ? copyout.part.0+0xd7/0x110 [ 72.874486][ T8453] ? preempt_schedule_thunk+0x16/0x18 [ 72.879846][ T8453] ? trace_hardirqs_on+0x38/0x1c0 [ 72.884851][ T8453] ? trace_hardirqs_on+0x51/0x1c0 [ 72.889859][ T8453] ? copyout.part.0+0xd7/0x110 [ 72.894607][ T8453] ? copyout.part.0+0xd7/0x110 [ 72.899356][ T8453] end_report.cold+0x5a/0x5a [ 72.903931][ T8453] kasan_report.cold+0x6a/0xd8 [ 72.908679][ T8453] ? copyout.part.0+0xd7/0x110 [ 72.913427][ T8453] kasan_check_range+0x13d/0x180 [ 72.918357][ T8453] copyout.part.0+0xd7/0x110 [ 72.922930][ T8453] _copy_to_iter+0x2b4/0x1850 [ 72.927616][ T8453] ? lock_chain_count+0x20/0x20 [ 72.932467][ T8453] ? ip_local_deliver_finish+0x240/0x370 [ 72.938101][ T8453] ? _copy_from_iter_nocache+0x1440/0x1440 [ 72.943888][ T8453] ? ip_local_deliver+0x195/0x200 [ 72.948910][ T8453] ? ip_sublist_rcv_finish+0x9a/0x2c0 [ 72.954283][ T8453] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 72.960511][ T8453] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 72.966316][ T8453] ? __virt_addr_valid+0x5d/0x2d0 [ 72.971586][ T8453] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 72.977899][ T8453] ? __phys_addr_symbol+0x2c/0x70 [ 72.983013][ T8453] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 72.988734][ T8453] ? __check_object_size+0x18a/0x3f0 [ 72.994007][ T8453] simple_copy_to_iter+0x4c/0x70 [ 72.998932][ T8453] __skb_datagram_iter+0x4a7/0x770 [ 73.004473][ T8453] ? zerocopy_sg_from_iter+0x110/0x110 [ 73.010032][ T8453] skb_copy_datagram_iter+0x40/0x50 [ 73.015433][ T8453] tcp_recvmsg_locked+0x1048/0x22f0 [ 73.020646][ T8453] ? tcp_splice_read+0x8b0/0x8b0 [ 73.025567][ T8453] ? mark_held_locks+0x9f/0xe0 [ 73.031710][ T8453] ? __local_bh_enable_ip+0xa0/0x120 [ 73.037478][ T8453] tcp_recvmsg+0x134/0x550 [ 73.041896][ T8453] ? tcp_recvmsg_locked+0x22f0/0x22f0 [ 73.047715][ T8453] ? aa_sk_perm+0x311/0xab0 [ 73.052948][ T8453] inet_recvmsg+0x11b/0x5e0 [ 73.057546][ T8453] ? inet_sendpage+0x140/0x140 [ 73.062323][ T8453] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 73.068806][ T8453] ? security_socket_recvmsg+0x8f/0xc0 [ 73.074524][ T8453] sock_read_iter+0x33c/0x470 [ 73.079550][ T8453] ? ____sys_recvmsg+0x600/0x600 [ 73.085261][ T8453] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 73.092365][ T8453] ? fsnotify+0xa58/0x1060 [ 73.097876][ T8453] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 73.104593][ T8453] new_sync_read+0x5b7/0x6e0 [ 73.109439][ T8453] ? ksys_lseek+0x1b0/0x1b0 [ 73.114508][ T8453] vfs_read+0x35c/0x570 [ 73.118661][ T8453] ksys_read+0x1ee/0x250 [ 73.123146][ T8453] ? vfs_write+0xa40/0xa40 [ 73.127841][ T8453] ? syscall_enter_from_user_mode+0x27/0x70 [ 73.133830][ T8453] do_syscall_64+0x3a/0xb0 [ 73.138376][ T8453] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 73.144542][ T8453] RIP: 0033:0x4af19b [ 73.148421][ T8453] Code: fb ff eb bd e8 a6 b6 fb ff e9 61 ff ff ff cc e8 9b 82 fb ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 73.168541][ T8453] RSP: 002b:000000c0000ab850 EFLAGS: 00000206 ORIG_RAX: 0000000000000000 [ 73.177062][ T8453] RAX: ffffffffffffffda RBX: 000000c00001e800 RCX: 00000000004af19b [ 73.185730][ T8453] RDX: 0000000000001000 RSI: 000000c000078000 RDI: 0000000000000006 [ 73.193812][ T8453] RBP: 000000c0000ab8a0 R08: 0000000000000001 R09: 0000000000000002 [ 73.202493][ T8453] R10: 0000000000002774 R11: 0000000000000206 R12: 0000000000002770 [ 73.210892][ T8453] R13: 0000000000000200 R14: 0000000000000002 R15: 0000000000000002 [ 73.220263][ T8453] Kernel Offset: disabled [ 73.224673][ T8453] Rebooting in 86400 seconds..