Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.38' (ECDSA) to the list of known hosts. 2021/05/03 20:10:41 fuzzer started 2021/05/03 20:10:41 dialing manager at 10.128.0.169:34381 2021/05/03 20:10:41 syscalls: 3586 2021/05/03 20:10:41 code coverage: enabled 2021/05/03 20:10:41 comparison tracing: enabled 2021/05/03 20:10:41 extra coverage: enabled 2021/05/03 20:10:41 setuid sandbox: enabled 2021/05/03 20:10:41 namespace sandbox: enabled 2021/05/03 20:10:41 Android sandbox: /sys/fs/selinux/policy does not exist 2021/05/03 20:10:41 fault injection: enabled 2021/05/03 20:10:41 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2021/05/03 20:10:41 net packet injection: enabled 2021/05/03 20:10:41 net device setup: enabled 2021/05/03 20:10:41 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2021/05/03 20:10:41 devlink PCI setup: PCI device 0000:00:10.0 is not available 2021/05/03 20:10:41 USB emulation: enabled 2021/05/03 20:10:41 hci packet injection: enabled 2021/05/03 20:10:41 wifi device emulation: enabled 2021/05/03 20:10:41 802.15.4 emulation: enabled 2021/05/03 20:10:41 fetching corpus: 0, signal 0/2000 (executing program) 2021/05/03 20:10:42 fetching corpus: 50, signal 44614/48294 (executing program) 2021/05/03 20:10:42 fetching corpus: 100, signal 75795/80955 (executing program) 2021/05/03 20:10:42 fetching corpus: 150, signal 99551/106091 (executing program) 2021/05/03 20:10:42 fetching corpus: 200, signal 118529/126366 (executing program) 2021/05/03 20:10:42 fetching corpus: 250, signal 129900/139068 (executing program) 2021/05/03 20:10:42 fetching corpus: 300, signal 148543/158762 (executing program) 2021/05/03 20:10:43 fetching corpus: 350, signal 166457/177627 (executing program) 2021/05/03 20:10:43 fetching corpus: 400, signal 180312/192437 (executing program) syzkaller login: [ 71.110228][ T3258] ieee802154 phy0 wpan0: encryption failed: -22 [ 71.119304][ T3258] ieee802154 phy1 wpan1: encryption failed: -22 2021/05/03 20:10:43 fetching corpus: 450, signal 193979/206936 (executing program) [ 71.219233][ T8421] ================================================================== [ 71.227425][ T8421] BUG: KASAN: use-after-free in __skb_datagram_iter+0x6b8/0x770 [ 71.235092][ T8421] Read of size 4 at addr ffff88802f080004 by task syz-fuzzer/8421 [ 71.242884][ T8421] [ 71.245191][ T8421] CPU: 0 PID: 8421 Comm: syz-fuzzer Not tainted 5.12.0-rc8-next-20210423-syzkaller #0 [ 71.255147][ T8421] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.265198][ T8421] Call Trace: [ 71.268467][ T8421] dump_stack+0x141/0x1d7 [ 71.272812][ T8421] ? __skb_datagram_iter+0x6b8/0x770 [ 71.279052][ T8421] print_address_description.constprop.0.cold+0x5b/0x2f8 [ 71.286084][ T8421] ? __skb_datagram_iter+0x6b8/0x770 [ 71.291352][ T8421] ? __skb_datagram_iter+0x6b8/0x770 [ 71.296632][ T8421] kasan_report.cold+0x7c/0xd8 [ 71.301386][ T8421] ? __skb_datagram_iter+0x6b8/0x770 [ 71.306655][ T8421] __skb_datagram_iter+0x6b8/0x770 [ 71.311750][ T8421] ? zerocopy_sg_from_iter+0x110/0x110 [ 71.318150][ T8421] skb_copy_datagram_iter+0x40/0x50 [ 71.323334][ T8421] tcp_recvmsg_locked+0x1048/0x22f0 [ 71.328528][ T8421] ? tcp_splice_read+0x8b0/0x8b0 [ 71.333452][ T8421] ? mark_held_locks+0x9f/0xe0 [ 71.338204][ T8421] ? __local_bh_enable_ip+0xa0/0x120 [ 71.343479][ T8421] tcp_recvmsg+0x134/0x550 [ 71.347986][ T8421] ? tcp_recvmsg_locked+0x22f0/0x22f0 [ 71.353367][ T8421] ? aa_sk_perm+0x311/0xab0 [ 71.357860][ T8421] inet_recvmsg+0x11b/0x5e0 [ 71.362351][ T8421] ? inet_sendpage+0x140/0x140 [ 71.367117][ T8421] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 71.373347][ T8421] ? security_socket_recvmsg+0x8f/0xc0 [ 71.378796][ T8421] sock_read_iter+0x33c/0x470 [ 71.383473][ T8421] ? ____sys_recvmsg+0x600/0x600 [ 71.388414][ T8421] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 71.394646][ T8421] ? fsnotify+0xa58/0x1060 [ 71.399167][ T8421] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 71.405397][ T8421] new_sync_read+0x5b7/0x6e0 [ 71.409989][ T8421] ? ksys_lseek+0x1b0/0x1b0 [ 71.414477][ T8421] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 71.420458][ T8421] vfs_read+0x35c/0x570 [ 71.424597][ T8421] ksys_read+0x1ee/0x250 [ 71.428837][ T8421] ? vfs_write+0xa40/0xa40 [ 71.433239][ T8421] ? syscall_enter_from_user_mode+0x27/0x70 [ 71.439157][ T8421] do_syscall_64+0x3a/0xb0 [ 71.443574][ T8421] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 71.449459][ T8421] RIP: 0033:0x4af19b [ 71.453343][ T8421] 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 [ 71.472939][ T8421] RSP: 002b:000000c000381828 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 71.481340][ T8421] RAX: ffffffffffffffda RBX: 000000c00001e800 RCX: 00000000004af19b [ 71.489305][ T8421] RDX: 0000000000001000 RSI: 000000c0001d2000 RDI: 0000000000000006 [ 71.497272][ T8421] RBP: 000000c000381878 R08: 0000000000000001 R09: 0000000000000002 [ 71.505240][ T8421] R10: 000000000000132f R11: 0000000000000212 R12: 000000000000132b [ 71.513194][ T8421] R13: 0000000000000400 R14: 0000000000000004 R15: 0000000000000002 [ 71.521161][ T8421] [ 71.523466][ T8421] The buggy address belongs to the page: [ 71.529176][ T8421] page:ffffea0000bc2000 refcount:0 mapcount:-128 mapping:0000000000000000 index:0x0 pfn:0x2f080 [ 71.539569][ T8421] flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) [ 71.546674][ T8421] raw: 00fff00000000000 ffffea0000ba6608 ffff88813fffb978 0000000000000000 [ 71.555245][ T8421] raw: 0000000000000000 0000000000000003 00000000ffffff7f 0000000000000000 [ 71.563814][ T8421] page dumped because: kasan: bad access detected [ 71.570284][ T8421] [ 71.572591][ T8421] Memory state around the buggy address: [ 71.578200][ T8421] ffff88802f07ff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 71.586336][ T8421] ffff88802f07ff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 71.594447][ T8421] >ffff88802f080000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 71.602927][ T8421] ^ [ 71.606995][ T8421] ffff88802f080080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 71.615057][ T8421] ffff88802f080100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 71.623097][ T8421] ================================================================== [ 71.631148][ T8421] Disabling lock debugging due to kernel taint [ 71.639789][ T8421] Kernel panic - not syncing: panic_on_warn set ... [ 71.646429][ T8421] CPU: 1 PID: 8421 Comm: syz-fuzzer Tainted: G B 5.12.0-rc8-next-20210423-syzkaller #0 [ 71.658279][ T8421] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.668330][ T8421] Call Trace: [ 71.671606][ T8421] dump_stack+0x141/0x1d7 [ 71.675944][ T8421] panic+0x306/0x73d [ 71.680013][ T8421] ? __warn_printk+0xf3/0xf3 [ 71.684608][ T8421] ? preempt_schedule_common+0x59/0xc0 [ 71.690093][ T8421] ? __skb_datagram_iter+0x6b8/0x770 [ 71.695395][ T8421] ? preempt_schedule_thunk+0x16/0x18 [ 71.701484][ T8421] ? trace_hardirqs_on+0x38/0x1c0 [ 71.706521][ T8421] ? trace_hardirqs_on+0x51/0x1c0 [ 71.711574][ T8421] ? __skb_datagram_iter+0x6b8/0x770 [ 71.716980][ T8421] ? __skb_datagram_iter+0x6b8/0x770 [ 71.722263][ T8421] end_report.cold+0x5a/0x5a [ 71.726873][ T8421] kasan_report.cold+0x6a/0xd8 [ 71.731639][ T8421] ? __skb_datagram_iter+0x6b8/0x770 [ 71.736928][ T8421] __skb_datagram_iter+0x6b8/0x770 [ 71.742062][ T8421] ? zerocopy_sg_from_iter+0x110/0x110 [ 71.747522][ T8421] skb_copy_datagram_iter+0x40/0x50 [ 71.752723][ T8421] tcp_recvmsg_locked+0x1048/0x22f0 [ 71.757938][ T8421] ? tcp_splice_read+0x8b0/0x8b0 [ 71.763223][ T8421] ? mark_held_locks+0x9f/0xe0 [ 71.768055][ T8421] ? __local_bh_enable_ip+0xa0/0x120 [ 71.773343][ T8421] tcp_recvmsg+0x134/0x550 [ 71.777763][ T8421] ? tcp_recvmsg_locked+0x22f0/0x22f0 [ 71.783139][ T8421] ? aa_sk_perm+0x311/0xab0 [ 71.787644][ T8421] inet_recvmsg+0x11b/0x5e0 [ 71.792158][ T8421] ? inet_sendpage+0x140/0x140 [ 71.796927][ T8421] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 71.803170][ T8421] ? security_socket_recvmsg+0x8f/0xc0 [ 71.808633][ T8421] sock_read_iter+0x33c/0x470 [ 71.813322][ T8421] ? ____sys_recvmsg+0x600/0x600 [ 71.818265][ T8421] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 71.824530][ T8421] ? fsnotify+0xa58/0x1060 [ 71.828969][ T8421] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 71.835233][ T8421] new_sync_read+0x5b7/0x6e0 [ 71.839824][ T8421] ? ksys_lseek+0x1b0/0x1b0 [ 71.844326][ T8421] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 71.850319][ T8421] vfs_read+0x35c/0x570 [ 71.854477][ T8421] ksys_read+0x1ee/0x250 [ 71.858738][ T8421] ? vfs_write+0xa40/0xa40 [ 71.863156][ T8421] ? syscall_enter_from_user_mode+0x27/0x70 [ 71.869070][ T8421] do_syscall_64+0x3a/0xb0 [ 71.873503][ T8421] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 71.879447][ T8421] RIP: 0033:0x4af19b [ 71.883337][ T8421] 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 [ 71.902944][ T8421] RSP: 002b:000000c000381828 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 71.911356][ T8421] RAX: ffffffffffffffda RBX: 000000c00001e800 RCX: 00000000004af19b [ 71.919321][ T8421] RDX: 0000000000001000 RSI: 000000c0001d2000 RDI: 0000000000000006 [ 71.927287][ T8421] RBP: 000000c000381878 R08: 0000000000000001 R09: 0000000000000002 [ 71.935251][ T8421] R10: 000000000000132f R11: 0000000000000212 R12: 000000000000132b [ 71.943220][ T8421] R13: 0000000000000400 R14: 0000000000000004 R15: 0000000000000002 [ 71.951606][ T8421] Kernel Offset: disabled [ 71.955920][ T8421] Rebooting in 86400 seconds..