Warning: Permanently added '10.128.1.7' (ECDSA) to the list of known hosts. 2021/05/01 10:56:02 fuzzer started 2021/05/01 10:56:03 dialing manager at 10.128.0.169:44661 2021/05/01 10:56:03 syscalls: 3571 2021/05/01 10:56:03 code coverage: enabled 2021/05/01 10:56:03 comparison tracing: enabled 2021/05/01 10:56:03 extra coverage: enabled 2021/05/01 10:56:03 setuid sandbox: enabled 2021/05/01 10:56:03 namespace sandbox: enabled 2021/05/01 10:56:03 Android sandbox: /sys/fs/selinux/policy does not exist 2021/05/01 10:56:03 fault injection: enabled 2021/05/01 10:56:03 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2021/05/01 10:56:03 net packet injection: enabled 2021/05/01 10:56:03 net device setup: enabled 2021/05/01 10:56:03 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2021/05/01 10:56:03 devlink PCI setup: PCI device 0000:00:10.0 is not available 2021/05/01 10:56:03 USB emulation: enabled 2021/05/01 10:56:03 hci packet injection: enabled 2021/05/01 10:56:03 wifi device emulation: enabled 2021/05/01 10:56:03 802.15.4 emulation: enabled 2021/05/01 10:56:03 fetching corpus: 0, signal 0/2000 (executing program) 2021/05/01 10:56:03 fetching corpus: 50, signal 55349/59058 (executing program) syzkaller login: [ 73.308457][ T8448] ================================================================== [ 73.316752][ T8448] BUG: KASAN: use-after-free in __skb_datagram_iter+0x6b8/0x770 [ 73.324391][ T8448] Read of size 4 at addr ffff8880315e0004 by task syz-fuzzer/8448 [ 73.332175][ T8448] [ 73.334484][ T8448] CPU: 1 PID: 8448 Comm: syz-fuzzer Not tainted 5.12.0-rc8-next-20210423-syzkaller #0 [ 73.344011][ T8448] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.354053][ T8448] Call Trace: [ 73.357323][ T8448] dump_stack+0x141/0x1d7 [ 73.361655][ T8448] ? __skb_datagram_iter+0x6b8/0x770 [ 73.366947][ T8448] print_address_description.constprop.0.cold+0x5b/0x2f8 [ 73.373991][ T8448] ? __skb_datagram_iter+0x6b8/0x770 [ 73.379287][ T8448] ? __skb_datagram_iter+0x6b8/0x770 [ 73.384556][ T8448] kasan_report.cold+0x7c/0xd8 [ 73.389314][ T8448] ? __skb_datagram_iter+0x6b8/0x770 [ 73.394585][ T8448] __skb_datagram_iter+0x6b8/0x770 [ 73.399702][ T8448] ? zerocopy_sg_from_iter+0x110/0x110 [ 73.405151][ T8448] skb_copy_datagram_iter+0x40/0x50 [ 73.410337][ T8448] tcp_recvmsg_locked+0x1048/0x22f0 [ 73.415538][ T8448] ? tcp_splice_read+0x8b0/0x8b0 [ 73.420473][ T8448] ? mark_held_locks+0x9f/0xe0 [ 73.425228][ T8448] ? __local_bh_enable_ip+0xa0/0x120 [ 73.430504][ T8448] tcp_recvmsg+0x134/0x550 [ 73.434910][ T8448] ? tcp_recvmsg_locked+0x22f0/0x22f0 [ 73.440290][ T8448] ? aa_sk_perm+0x311/0xab0 [ 73.444780][ T8448] inet_recvmsg+0x11b/0x5e0 [ 73.449276][ T8448] ? inet_sendpage+0x140/0x140 [ 73.454030][ T8448] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 73.460258][ T8448] ? security_socket_recvmsg+0x8f/0xc0 [ 73.465707][ T8448] sock_read_iter+0x33c/0x470 [ 73.470374][ T8448] ? ____sys_recvmsg+0x600/0x600 [ 73.475321][ T8448] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 73.481570][ T8448] ? fsnotify+0xa58/0x1060 [ 73.485973][ T8448] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 73.492204][ T8448] new_sync_read+0x5b7/0x6e0 [ 73.496784][ T8448] ? ksys_lseek+0x1b0/0x1b0 [ 73.501272][ T8448] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 73.507377][ T8448] vfs_read+0x35c/0x570 [ 73.511535][ T8448] ksys_read+0x1ee/0x250 [ 73.515782][ T8448] ? vfs_write+0xa40/0xa40 [ 73.520198][ T8448] ? syscall_enter_from_user_mode+0x27/0x70 [ 73.526088][ T8448] do_syscall_64+0x3a/0xb0 [ 73.530504][ T8448] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 73.536389][ T8448] RIP: 0033:0x4af19b [ 73.540270][ T8448] 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 [ 73.560119][ T8448] RSP: 002b:000000c000657850 EFLAGS: 00000206 ORIG_RAX: 0000000000000000 [ 73.568527][ T8448] RAX: ffffffffffffffda RBX: 000000c00001e800 RCX: 00000000004af19b [ 73.576486][ T8448] RDX: 0000000000001000 RSI: 000000c000218000 RDI: 0000000000000006 [ 73.584443][ T8448] RBP: 000000c0006578a0 R08: 0000000000000001 R09: 0000000000000002 [ 73.592399][ T8448] R10: 00000000000044f0 R11: 0000000000000206 R12: 00000000000044ec [ 73.600504][ T8448] R13: 0000000000000100 R14: 0000000000000004 R15: 0000000000000002 [ 73.608471][ T8448] [ 73.610778][ T8448] The buggy address belongs to the page: [ 73.616386][ T8448] page:ffffea0000c57800 refcount:0 mapcount:-128 mapping:0000000000000000 index:0x0 pfn:0x315e0 [ 73.626877][ T8448] flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) [ 73.634000][ T8448] raw: 00fff00000000000 ffffea0000d27808 ffff88813fffb9e0 0000000000000000 [ 73.642574][ T8448] raw: 0000000000000000 0000000000000004 00000000ffffff7f 0000000000000000 [ 73.651144][ T8448] page dumped because: kasan: bad access detected [ 73.657540][ T8448] [ 73.659848][ T8448] Memory state around the buggy address: [ 73.665491][ T8448] ffff8880315dff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 73.673668][ T8448] ffff8880315dff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 73.681846][ T8448] >ffff8880315e0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 73.689896][ T8448] ^ [ 73.693968][ T8448] ffff8880315e0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 73.702010][ T8448] ffff8880315e0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 73.710049][ T8448] ================================================================== [ 73.718105][ T8448] Disabling lock debugging due to kernel taint [ 73.725603][ T8448] Kernel panic - not syncing: panic_on_warn set ... [ 73.732295][ T8448] CPU: 1 PID: 8448 Comm: syz-fuzzer Tainted: G B 5.12.0-rc8-next-20210423-syzkaller #0 [ 73.743235][ T8448] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.753297][ T8448] Call Trace: [ 73.756575][ T8448] dump_stack+0x141/0x1d7 [ 73.760901][ T8448] panic+0x306/0x73d [ 73.764793][ T8448] ? __warn_printk+0xf3/0xf3 [ 73.769374][ T8448] ? preempt_schedule_common+0x59/0xc0 [ 73.774826][ T8448] ? __skb_datagram_iter+0x6b8/0x770 [ 73.780121][ T8448] ? preempt_schedule_thunk+0x16/0x18 [ 73.785484][ T8448] ? trace_hardirqs_on+0x38/0x1c0 [ 73.790499][ T8448] ? trace_hardirqs_on+0x51/0x1c0 [ 73.795511][ T8448] ? __skb_datagram_iter+0x6b8/0x770 [ 73.800786][ T8448] ? __skb_datagram_iter+0x6b8/0x770 [ 73.806075][ T8448] end_report.cold+0x5a/0x5a [ 73.810658][ T8448] kasan_report.cold+0x6a/0xd8 [ 73.815413][ T8448] ? __skb_datagram_iter+0x6b8/0x770 [ 73.820686][ T8448] __skb_datagram_iter+0x6b8/0x770 [ 73.825787][ T8448] ? zerocopy_sg_from_iter+0x110/0x110 [ 73.831235][ T8448] skb_copy_datagram_iter+0x40/0x50 [ 73.836420][ T8448] tcp_recvmsg_locked+0x1048/0x22f0 [ 73.841623][ T8448] ? tcp_splice_read+0x8b0/0x8b0 [ 73.846556][ T8448] ? mark_held_locks+0x9f/0xe0 [ 73.851314][ T8448] ? __local_bh_enable_ip+0xa0/0x120 [ 73.856697][ T8448] tcp_recvmsg+0x134/0x550 [ 73.861108][ T8448] ? tcp_recvmsg_locked+0x22f0/0x22f0 [ 73.866476][ T8448] ? aa_sk_perm+0x311/0xab0 [ 73.870968][ T8448] inet_recvmsg+0x11b/0x5e0 [ 73.875462][ T8448] ? inet_sendpage+0x140/0x140 [ 73.880217][ T8448] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 73.886450][ T8448] ? security_socket_recvmsg+0x8f/0xc0 [ 73.891905][ T8448] sock_read_iter+0x33c/0x470 [ 73.896575][ T8448] ? ____sys_recvmsg+0x600/0x600 [ 73.901507][ T8448] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 73.907740][ T8448] ? fsnotify+0xa58/0x1060 [ 73.912145][ T8448] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 73.918378][ T8448] new_sync_read+0x5b7/0x6e0 [ 73.922960][ T8448] ? ksys_lseek+0x1b0/0x1b0 [ 73.927451][ T8448] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 73.933431][ T8448] vfs_read+0x35c/0x570 [ 73.937578][ T8448] ksys_read+0x1ee/0x250 [ 73.941810][ T8448] ? vfs_write+0xa40/0xa40 [ 73.946217][ T8448] ? syscall_enter_from_user_mode+0x27/0x70 [ 73.952100][ T8448] do_syscall_64+0x3a/0xb0 [ 73.956507][ T8448] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 73.962390][ T8448] RIP: 0033:0x4af19b [ 73.966273][ T8448] 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 [ 73.985885][ T8448] RSP: 002b:000000c000657850 EFLAGS: 00000206 ORIG_RAX: 0000000000000000 [ 73.994292][ T8448] RAX: ffffffffffffffda RBX: 000000c00001e800 RCX: 00000000004af19b [ 74.002266][ T8448] RDX: 0000000000001000 RSI: 000000c000218000 RDI: 0000000000000006 [ 74.010226][ T8448] RBP: 000000c0006578a0 R08: 0000000000000001 R09: 0000000000000002 [ 74.018186][ T8448] R10: 00000000000044f0 R11: 0000000000000206 R12: 00000000000044ec [ 74.026143][ T8448] R13: 0000000000000100 R14: 0000000000000004 R15: 0000000000000002 [ 74.034568][ T8448] Kernel Offset: disabled [ 74.038882][ T8448] Rebooting in 86400 seconds..