Warning: Permanently added '10.128.0.173' (ECDSA) to the list of known hosts. 2021/05/02 23:32:49 fuzzer started 2021/05/02 23:32:49 dialing manager at 10.128.0.169:44661 2021/05/02 23:32:49 syscalls: 3571 2021/05/02 23:32:49 code coverage: enabled 2021/05/02 23:32:49 comparison tracing: enabled 2021/05/02 23:32:49 extra coverage: enabled 2021/05/02 23:32:49 setuid sandbox: enabled 2021/05/02 23:32:49 namespace sandbox: enabled 2021/05/02 23:32:49 Android sandbox: /sys/fs/selinux/policy does not exist 2021/05/02 23:32:49 fault injection: enabled 2021/05/02 23:32:49 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2021/05/02 23:32:49 net packet injection: enabled 2021/05/02 23:32:49 net device setup: enabled 2021/05/02 23:32:49 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2021/05/02 23:32:49 devlink PCI setup: PCI device 0000:00:10.0 is not available 2021/05/02 23:32:49 USB emulation: enabled 2021/05/02 23:32:49 hci packet injection: enabled 2021/05/02 23:32:49 wifi device emulation: enabled 2021/05/02 23:32:49 802.15.4 emulation: enabled 2021/05/02 23:32:49 fetching corpus: 0, signal 0/2000 (executing program) syzkaller login: [ 72.029596][ T8431] ================================================================== [ 72.037922][ T8431] BUG: KASAN: use-after-free in __skb_datagram_iter+0x6b8/0x770 [ 72.045622][ T8431] Read of size 4 at addr ffff88802afe0004 by task syz-fuzzer/8431 [ 72.053458][ T8431] [ 72.055804][ T8431] CPU: 1 PID: 8431 Comm: syz-fuzzer Not tainted 5.12.0-rc8-next-20210423-syzkaller #0 [ 72.065478][ T8431] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.076441][ T8431] Call Trace: [ 72.079774][ T8431] dump_stack+0x141/0x1d7 [ 72.084157][ T8431] ? __skb_datagram_iter+0x6b8/0x770 [ 72.089500][ T8431] print_address_description.constprop.0.cold+0x5b/0x2f8 [ 72.096633][ T8431] ? __skb_datagram_iter+0x6b8/0x770 [ 72.102220][ T8431] ? __skb_datagram_iter+0x6b8/0x770 [ 72.108240][ T8431] kasan_report.cold+0x7c/0xd8 [ 72.113056][ T8431] ? __skb_datagram_iter+0x6b8/0x770 [ 72.118392][ T8431] __skb_datagram_iter+0x6b8/0x770 [ 72.123551][ T8431] ? zerocopy_sg_from_iter+0x110/0x110 [ 72.129055][ T8431] skb_copy_datagram_iter+0x40/0x50 [ 72.134293][ T8431] tcp_recvmsg_locked+0x1048/0x22f0 [ 72.139644][ T8431] ? tcp_splice_read+0x8b0/0x8b0 [ 72.145121][ T8431] ? mark_held_locks+0x9f/0xe0 [ 72.149909][ T8431] ? __local_bh_enable_ip+0xa0/0x120 [ 72.155220][ T8431] tcp_recvmsg+0x134/0x550 [ 72.159667][ T8431] ? tcp_recvmsg_locked+0x22f0/0x22f0 [ 72.165053][ T8431] ? aa_sk_perm+0x311/0xab0 [ 72.169562][ T8431] inet_recvmsg+0x11b/0x5e0 [ 72.174093][ T8431] ? inet_sendpage+0x140/0x140 [ 72.178902][ T8431] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 72.185149][ T8431] ? security_socket_recvmsg+0x8f/0xc0 [ 72.190633][ T8431] sock_read_iter+0x33c/0x470 [ 72.195359][ T8431] ? ____sys_recvmsg+0x600/0x600 [ 72.200348][ T8431] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 72.206715][ T8431] ? fsnotify+0xa58/0x1060 [ 72.211186][ T8431] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 72.217451][ T8431] new_sync_read+0x5b7/0x6e0 [ 72.222052][ T8431] ? ksys_lseek+0x1b0/0x1b0 [ 72.226561][ T8431] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 72.232570][ T8431] vfs_read+0x35c/0x570 [ 72.236761][ T8431] ksys_read+0x1ee/0x250 [ 72.241054][ T8431] ? vfs_write+0xa40/0xa40 [ 72.245512][ T8431] ? syscall_enter_from_user_mode+0x27/0x70 [ 72.251439][ T8431] do_syscall_64+0x3a/0xb0 [ 72.255885][ T8431] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 72.261817][ T8431] RIP: 0033:0x4af19b [ 72.265741][ T8431] 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 [ 72.285686][ T8431] RSP: 002b:000000c000559828 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 72.294317][ T8431] RAX: ffffffffffffffda RBX: 000000c00001e800 RCX: 00000000004af19b [ 72.302519][ T8431] RDX: 0000000000001000 RSI: 000000c000204000 RDI: 0000000000000006 [ 72.311925][ T8431] RBP: 000000c000559878 R08: 0000000000000001 R09: 0000000000000002 [ 72.320063][ T8431] R10: 0000000000006449 R11: 0000000000000212 R12: ffffffffffffffff [ 72.328052][ T8431] R13: 0000000000002000 R14: 0000000000000002 R15: 0000000000000002 [ 72.336351][ T8431] [ 72.338697][ T8431] The buggy address belongs to the page: [ 72.344320][ T8431] page:ffffea0000abf800 refcount:0 mapcount:-128 mapping:0000000000000000 index:0x0 pfn:0x2afe0 [ 72.354817][ T8431] flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) [ 72.361973][ T8431] raw: 00fff00000000000 ffffea0000d03008 ffffea0000d03808 0000000000000000 [ 72.370585][ T8431] raw: 0000000000000000 0000000000000004 00000000ffffff7f 0000000000000000 [ 72.379343][ T8431] page dumped because: kasan: bad access detected [ 72.385753][ T8431] [ 72.388088][ T8431] Memory state around the buggy address: [ 72.393814][ T8431] ffff88802afdff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 72.402000][ T8431] ffff88802afdff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 72.410501][ T8431] >ffff88802afe0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 72.418585][ T8431] ^ [ 72.422653][ T8431] ffff88802afe0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 72.430731][ T8431] ffff88802afe0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 72.438797][ T8431] ================================================================== [ 72.446864][ T8431] Disabling lock debugging due to kernel taint [ 72.453931][ T8431] Kernel panic - not syncing: panic_on_warn set ... [ 72.460652][ T8431] CPU: 1 PID: 8431 Comm: syz-fuzzer Tainted: G B 5.12.0-rc8-next-20210423-syzkaller #0 [ 72.471710][ T8431] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.481788][ T8431] Call Trace: [ 72.485078][ T8431] dump_stack+0x141/0x1d7 [ 72.489532][ T8431] panic+0x306/0x73d [ 72.493446][ T8431] ? __warn_printk+0xf3/0xf3 [ 72.498181][ T8431] ? preempt_schedule_common+0x59/0xc0 [ 72.503666][ T8431] ? __skb_datagram_iter+0x6b8/0x770 [ 72.508959][ T8431] ? preempt_schedule_thunk+0x16/0x18 [ 72.514350][ T8431] ? trace_hardirqs_on+0x38/0x1c0 [ 72.519380][ T8431] ? trace_hardirqs_on+0x51/0x1c0 [ 72.524425][ T8431] ? __skb_datagram_iter+0x6b8/0x770 [ 72.529716][ T8431] ? __skb_datagram_iter+0x6b8/0x770 [ 72.535014][ T8431] end_report.cold+0x5a/0x5a [ 72.539615][ T8431] kasan_report.cold+0x6a/0xd8 [ 72.544404][ T8431] ? __skb_datagram_iter+0x6b8/0x770 [ 72.549733][ T8431] __skb_datagram_iter+0x6b8/0x770 [ 72.554854][ T8431] ? zerocopy_sg_from_iter+0x110/0x110 [ 72.560327][ T8431] skb_copy_datagram_iter+0x40/0x50 [ 72.566062][ T8431] tcp_recvmsg_locked+0x1048/0x22f0 [ 72.571373][ T8431] ? tcp_splice_read+0x8b0/0x8b0 [ 72.576326][ T8431] ? mark_held_locks+0x9f/0xe0 [ 72.581105][ T8431] ? __local_bh_enable_ip+0xa0/0x120 [ 72.586403][ T8431] tcp_recvmsg+0x134/0x550 [ 72.590836][ T8431] ? tcp_recvmsg_locked+0x22f0/0x22f0 [ 72.596272][ T8431] ? aa_sk_perm+0x311/0xab0 [ 72.600789][ T8431] inet_recvmsg+0x11b/0x5e0 [ 72.605329][ T8431] ? inet_sendpage+0x140/0x140 [ 72.610107][ T8431] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 72.616452][ T8431] ? security_socket_recvmsg+0x8f/0xc0 [ 72.622048][ T8431] sock_read_iter+0x33c/0x470 [ 72.626770][ T8431] ? ____sys_recvmsg+0x600/0x600 [ 72.631737][ T8431] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 72.638010][ T8431] ? fsnotify+0xa58/0x1060 [ 72.642456][ T8431] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 72.648726][ T8431] new_sync_read+0x5b7/0x6e0 [ 72.653355][ T8431] ? ksys_lseek+0x1b0/0x1b0 [ 72.657880][ T8431] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 72.663903][ T8431] vfs_read+0x35c/0x570 [ 72.668084][ T8431] ksys_read+0x1ee/0x250 [ 72.672383][ T8431] ? vfs_write+0xa40/0xa40 [ 72.676829][ T8431] ? syscall_enter_from_user_mode+0x27/0x70 [ 72.682741][ T8431] do_syscall_64+0x3a/0xb0 [ 72.687208][ T8431] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 72.693123][ T8431] RIP: 0033:0x4af19b [ 72.697027][ T8431] 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 [ 72.716648][ T8431] RSP: 002b:000000c000559828 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 72.725085][ T8431] RAX: ffffffffffffffda RBX: 000000c00001e800 RCX: 00000000004af19b [ 72.733077][ T8431] RDX: 0000000000001000 RSI: 000000c000204000 RDI: 0000000000000006 [ 72.741088][ T8431] RBP: 000000c000559878 R08: 0000000000000001 R09: 0000000000000002 [ 72.749082][ T8431] R10: 0000000000006449 R11: 0000000000000212 R12: ffffffffffffffff [ 72.757138][ T8431] R13: 0000000000002000 R14: 0000000000000002 R15: 0000000000000002 [ 72.765672][ T8431] Kernel Offset: disabled [ 72.770131][ T8431] Rebooting in 86400 seconds..