Warning: Permanently added '10.128.0.8' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 66.907049][ T8840] nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead. executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 68.504435][ T8867] kasan: CONFIG_KASAN_INLINE enabled [ 68.510441][ T8867] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 68.518506][ T8867] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 68.525426][ T8867] CPU: 0 PID: 8867 Comm: syz-executor110 Not tainted 5.4.0-rc8-syzkaller #0 [ 68.534070][ T8867] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.544119][ T8867] RIP: 0010:skb_unlink+0xc4/0x160 [ 68.549138][ T8867] Code: 00 00 49 8d 7d 08 4c 8b 63 08 48 b8 00 00 00 00 00 fc ff df 48 c7 43 08 00 00 00 00 48 89 fa 48 c7 03 00 00 00 00 48 c1 ea 03 <80> 3c 02 00 75 58 4c 89 e2 4d 89 65 08 48 b8 00 00 00 00 00 fc ff [ 68.568731][ T8867] RSP: 0018:ffff88808f9d7908 EFLAGS: 00010002 [ 68.574785][ T8867] RAX: dffffc0000000000 RBX: ffff88809c85ed00 RCX: ffffffff815a6e2a [ 68.582739][ T8867] RDX: 0000000000000001 RSI: 0000000000000282 RDI: 0000000000000008 [ 68.590694][ T8867] RBP: ffff88808f9d7930 R08: 0000000000000004 R09: ffffed1011f3af0e [ 68.598646][ T8867] R10: ffffed1011f3af0d R11: 0000000000000003 R12: 0000000000000000 [ 68.606593][ T8867] R13: 0000000000000000 R14: ffff8880a4e31468 R15: ffff88808f9d79d8 [ 68.614551][ T8867] FS: 00007f41abe7d700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 68.623467][ T8867] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.630053][ T8867] CR2: 00000000209ff000 CR3: 000000009d33f000 CR4: 00000000001406f0 [ 68.638014][ T8867] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 68.645963][ T8867] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 68.653925][ T8867] Call Trace: [ 68.657220][ T8867] kcm_recvmsg+0x462/0x560 [ 68.661630][ T8867] ? kcm_splice_read+0x360/0x360 [ 68.666556][ T8867] ? kcm_splice_read+0x360/0x360 [ 68.671473][ T8867] sock_recvmsg_nosec+0x89/0xb0 [ 68.676446][ T8867] ? __sock_tx_timestamp+0xd0/0xd0 [ 68.681546][ T8867] ___sys_recvmsg+0x271/0x5c0 [ 68.686209][ T8867] ? __kasan_check_read+0x11/0x20 [ 68.691371][ T8867] ? ___sys_sendmsg+0x920/0x920 [ 68.696205][ T8867] ? __kasan_check_read+0x11/0x20 [ 68.701209][ T8867] ? __might_fault+0x12b/0x1e0 [ 68.705951][ T8867] ? find_held_lock+0x35/0x130 [ 68.710697][ T8867] ? __might_fault+0x12b/0x1e0 [ 68.715442][ T8867] ? ksys_dup3+0x3e0/0x3e0 [ 68.719974][ T8867] ? lock_downgrade+0x920/0x920 [ 68.724853][ T8867] do_recvmmsg+0x27e/0x7a0 [ 68.729438][ T8867] ? ___sys_recvmsg+0x5c0/0x5c0 [ 68.734281][ T8867] ? __fd_install+0x1bc/0x640 [ 68.739018][ T8867] ? lock_downgrade+0x920/0x920 [ 68.743882][ T8867] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 68.750110][ T8867] ? __fd_install+0x200/0x640 [ 68.754779][ T8867] __sys_recvmmsg+0x259/0x270 [ 68.759440][ T8867] ? __ia32_sys_recvmsg+0xb0/0xb0 [ 68.764613][ T8867] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 68.770094][ T8867] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 68.775538][ T8867] ? do_syscall_64+0x26/0x760 [ 68.780223][ T8867] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 68.786291][ T8867] ? do_syscall_64+0x26/0x760 [ 68.790960][ T8867] __x64_sys_recvmmsg+0xe6/0x140 [ 68.795910][ T8867] do_syscall_64+0xfa/0x760 [ 68.800406][ T8867] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 68.806284][ T8867] RIP: 0033:0x446a39 [ 68.810191][ T8867] Code: e8 5c b3 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 0b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 68.829788][ T8867] RSP: 002b:00007f41abe7cd98 EFLAGS: 00000246 ORIG_RAX: 000000000000012b [ 68.838181][ T8867] RAX: ffffffffffffffda RBX: 00000000006dbc48 RCX: 0000000000446a39 [ 68.846151][ T8867] RDX: 0400000000000310 RSI: 0000000020003540 RDI: 0000000000000005 [ 68.854103][ T8867] RBP: 00000000006dbc40 R08: 0000000000000000 R09: 0000000000000000 [ 68.862054][ T8867] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc4c [ 68.870028][ T8867] R13: 00000000002b0095 R14: 0000a50000000000 R15: 0000000300000018 [ 68.877986][ T8867] Modules linked in: [ 68.881879][ T8867] ---[ end trace 802ff7d92834ff46 ]--- [ 68.887331][ T8867] RIP: 0010:skb_unlink+0xc4/0x160 [ 68.892420][ T8867] Code: 00 00 49 8d 7d 08 4c 8b 63 08 48 b8 00 00 00 00 00 fc ff df 48 c7 43 08 00 00 00 00 48 89 fa 48 c7 03 00 00 00 00 48 c1 ea 03 <80> 3c 02 00 75 58 4c 89 e2 4d 89 65 08 48 b8 00 00 00 00 00 fc ff [ 68.912143][ T8867] RSP: 0018:ffff88808f9d7908 EFLAGS: 00010002 [ 68.918198][ T8867] RAX: dffffc0000000000 RBX: ffff88809c85ed00 RCX: ffffffff815a6e2a [ 68.926155][ T8867] RDX: 0000000000000001 RSI: 0000000000000282 RDI: 0000000000000008 [ 68.934107][ T8867] RBP: ffff88808f9d7930 R08: 0000000000000004 R09: ffffed1011f3af0e [ 68.942210][ T8867] R10: ffffed1011f3af0d R11: 0000000000000003 R12: 0000000000000000 [ 68.950172][ T8867] R13: 0000000000000000 R14: ffff8880a4e31468 R15: ffff88808f9d79d8 [ 68.958134][ T8867] FS: 00007f41abe7d700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 68.967045][ T8867] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.973607][ T8867] CR2: 00000000209ff000 CR3: 000000009d33f000 CR4: 00000000001406f0 [ 68.981562][ T8867] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 68.989539][ T8867] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 68.997494][ T8867] Kernel panic - not syncing: Fatal exception [ 69.005043][ T8867] Kernel Offset: disabled [ 69.009376][ T8867] Rebooting in 86400 seconds..