[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 80.803951][ T27] kauditd_printk_skb: 4 callbacks suppressed [ 80.803966][ T27] audit: type=1800 audit(1578505519.999:29): pid=9973 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 80.830874][ T27] audit: type=1800 audit(1578505520.009:30): pid=9973 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.22' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 91.328695][T10130] kasan: CONFIG_KASAN_INLINE enabled [ 91.334186][T10130] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 91.342330][T10130] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 91.349286][T10130] CPU: 1 PID: 10130 Comm: syz-executor282 Not tainted 5.5.0-rc4-syzkaller #0 [ 91.358424][T10130] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 91.368502][T10130] RIP: 0010:hash_ipportip6_uadt+0x226/0xa00 [ 91.374385][T10130] Code: 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 14 07 00 00 4c 89 ea 45 8b 76 04 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 4c 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 d9 [ 91.394223][T10130] RSP: 0018:ffffc90001c27170 EFLAGS: 00010246 [ 91.400279][T10130] RAX: dffffc0000000000 RBX: ffffc90001c27320 RCX: 0000000000000000 [ 91.408251][T10130] RDX: 0000000000000000 RSI: ffffffff8680ba53 RDI: ffff8880a05c4830 [ 91.419173][T10130] RBP: ffffc90001c272b8 R08: 0000000000000000 R09: 0000000000000000 [ 91.427126][T10130] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: ffff8880a70aaa00 [ 91.435091][T10130] R13: 0000000000000000 R14: 0000000004000000 R15: 0000000000000002 [ 91.443049][T10130] FS: 000000000233f880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 91.452025][T10130] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 91.458590][T10130] CR2: 0000000020000180 CR3: 000000009f6af000 CR4: 00000000001406e0 [ 91.466577][T10130] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 91.474531][T10130] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 91.482496][T10130] Call Trace: [ 91.485774][T10130] ? hash_ipportip4_test+0x6c0/0x6c0 [ 91.491044][T10130] ? hash_ipportip6_same_set+0x1a0/0x1a0 [ 91.496663][T10130] ? ip_set_utest+0x4aa/0x890 [ 91.501323][T10130] ? __kasan_check_read+0x11/0x20 [ 91.506350][T10130] ip_set_utest+0x55b/0x890 [ 91.510867][T10130] ? ip_set_put_byindex+0x490/0x490 [ 91.516064][T10130] ? __mutex_lock+0x458/0x13c0 [ 91.520837][T10130] ? ip_set_put_byindex+0x490/0x490 [ 91.526020][T10130] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 91.530966][T10130] ? nfnetlink_bind+0x2c0/0x2c0 [ 91.535944][T10130] ? __kasan_check_read+0x11/0x20 [ 91.541085][T10130] ? __lock_acquire+0x8a0/0x4a00 [ 91.546056][T10130] ? save_stack+0x5c/0x90 [ 91.550425][T10130] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 91.556672][T10130] ? apparmor_capable+0x497/0x900 [ 91.561699][T10130] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 91.567926][T10130] ? __kasan_check_read+0x11/0x20 [ 91.573021][T10130] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 91.578468][T10130] netlink_rcv_skb+0x177/0x450 [ 91.583403][T10130] ? nfnetlink_bind+0x2c0/0x2c0 [ 91.588248][T10130] ? netlink_ack+0xb50/0xb50 [ 91.592831][T10130] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 91.599059][T10130] ? ns_capable_common+0x93/0x100 [ 91.604078][T10130] ? ns_capable+0x20/0x30 [ 91.608395][T10130] ? __netlink_ns_capable+0x104/0x140 [ 91.613769][T10130] nfnetlink_rcv+0x1ba/0x460 [ 91.618513][T10130] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 91.623968][T10130] ? netlink_deliver_tap+0x24a/0xbe0 [ 91.629250][T10130] ? __kasan_check_write+0x14/0x20 [ 91.634361][T10130] netlink_unicast+0x58c/0x7d0 [ 91.639106][T10130] ? netlink_attachskb+0x870/0x870 [ 91.644199][T10130] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 91.650942][T10130] ? __check_object_size+0x3d/0x437 [ 91.656124][T10130] netlink_sendmsg+0x91c/0xea0 [ 91.660870][T10130] ? netlink_unicast+0x7d0/0x7d0 [ 91.665799][T10130] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 91.671366][T10130] ? apparmor_socket_sendmsg+0x2a/0x30 [ 91.677046][T10130] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 91.683280][T10130] ? security_socket_sendmsg+0x8d/0xc0 [ 91.688722][T10130] ? netlink_unicast+0x7d0/0x7d0 [ 91.693728][T10130] sock_sendmsg+0xd7/0x130 [ 91.698235][T10130] ____sys_sendmsg+0x753/0x880 [ 91.702993][T10130] ? kernel_sendmsg+0x50/0x50 [ 91.707660][T10130] ? _raw_spin_unlock+0x28/0x40 [ 91.712502][T10130] ? do_huge_pmd_wp_page+0x53a/0x21c0 [ 91.717951][T10130] ___sys_sendmsg+0x100/0x170 [ 91.722623][T10130] ? sendmsg_copy_msghdr+0x70/0x70 [ 91.727745][T10130] ? fault_around_bytes_set+0xa0/0xa0 [ 91.733114][T10130] ? __do_page_fault+0x56a/0xd80 [ 91.738054][T10130] ? find_held_lock+0x35/0x130 [ 91.742811][T10130] ? __do_page_fault+0x56a/0xd80 [ 91.747739][T10130] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 91.753970][T10130] ? __fget_light+0x1a9/0x230 [ 91.758631][T10130] ? __fdget+0x1b/0x20 [ 91.762686][T10130] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 91.768933][T10130] __sys_sendmsg+0x105/0x1d0 [ 91.773564][T10130] ? __sys_sendmsg_sock+0xc0/0xc0 [ 91.778937][T10130] ? down_read_non_owner+0x490/0x490 [ 91.784234][T10130] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 91.789700][T10130] ? do_syscall_64+0x26/0x790 [ 91.794371][T10130] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 91.800437][T10130] ? do_syscall_64+0x26/0x790 [ 91.805116][T10130] __x64_sys_sendmsg+0x78/0xb0 [ 91.809870][T10130] do_syscall_64+0xfa/0x790 [ 91.814387][T10130] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 91.820266][T10130] RIP: 0033:0x441469 [ 91.824250][T10130] Code: e8 fc ab 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 9b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 91.843848][T10130] RSP: 002b:00007ffc16a7f108 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 91.853137][T10130] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441469 [ 91.861208][T10130] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 [ 91.869246][T10130] RBP: 0000000000016492 R08: 00000000004002c8 R09: 00000000004002c8 [ 91.877504][T10130] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000402290 [ 91.885557][T10130] R13: 0000000000402320 R14: 0000000000000000 R15: 0000000000000000 [ 91.893658][T10130] Modules linked in: [ 91.897798][T10130] ---[ end trace 572a8a65106e48a2 ]--- [ 91.903569][T10130] RIP: 0010:hash_ipportip6_uadt+0x226/0xa00 [ 91.909613][T10130] Code: 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 14 07 00 00 4c 89 ea 45 8b 76 04 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 4c 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 d9 [ 91.930111][T10130] RSP: 0018:ffffc90001c27170 EFLAGS: 00010246 [ 91.936352][T10130] RAX: dffffc0000000000 RBX: ffffc90001c27320 RCX: 0000000000000000 [ 91.944653][T10130] RDX: 0000000000000000 RSI: ffffffff8680ba53 RDI: ffff8880a05c4830 [ 91.953089][T10130] RBP: ffffc90001c272b8 R08: 0000000000000000 R09: 0000000000000000 [ 91.961303][T10130] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: ffff8880a70aaa00 [ 91.969318][T10130] R13: 0000000000000000 R14: 0000000004000000 R15: 0000000000000002 [ 91.977397][T10130] FS: 000000000233f880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 91.986612][T10130] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 91.993414][T10130] CR2: 0000000020000180 CR3: 000000009f6af000 CR4: 00000000001406e0 [ 92.001725][T10130] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 92.009733][T10130] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 92.017840][T10130] Kernel panic - not syncing: Fatal exception in interrupt [ 92.027165][T10130] Kernel Offset: disabled [ 92.031782][T10130] Rebooting in 86400 seconds..