[....] 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. [ 28.292979] kauditd_printk_skb: 7 callbacks suppressed [ 28.292990] audit: type=1800 audit(1540937566.337:29): pid=5569 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 28.324704] audit: type=1800 audit(1540937566.337:30): pid=5569 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.0.33' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 40.389728] WARNING: CPU: 1 PID: 6211 at net/rds/message.c:316 rds_message_alloc_sgs+0x10c/0x160 [ 40.398687] Kernel panic - not syncing: panic_on_warn set ... [ 40.398687] [ 40.406043] CPU: 1 PID: 6211 Comm: syz-executor633 Not tainted 4.19.0+ #88 [ 40.413037] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.422371] Call Trace: [ 40.424948] dump_stack+0x244/0x39d [ 40.428565] ? dump_stack_print_info.cold.1+0x20/0x20 [ 40.433769] panic+0x238/0x4e7 [ 40.436952] ? add_taint.cold.5+0x16/0x16 [ 40.441093] ? __warn.cold.8+0x5/0x4a [ 40.444884] ? __warn+0xe8/0x1d0 [ 40.448263] ? rds_message_alloc_sgs+0x10c/0x160 [ 40.453006] __warn.cold.8+0x20/0x4a [ 40.456720] ? rcu_softirq_qs+0x20/0x20 [ 40.460716] ? rds_message_alloc_sgs+0x10c/0x160 [ 40.465475] report_bug+0x254/0x2d0 [ 40.469113] do_error_trap+0x11b/0x200 [ 40.473009] do_invalid_op+0x36/0x40 [ 40.476723] ? rds_message_alloc_sgs+0x10c/0x160 [ 40.481470] invalid_op+0x14/0x20 [ 40.484951] RIP: 0010:rds_message_alloc_sgs+0x10c/0x160 [ 40.490327] Code: c0 74 04 3c 03 7e 6c 44 01 ab 78 01 00 00 e8 db 89 38 fa 4c 89 e0 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 c4 89 38 fa <0f> 0b 31 ff 44 89 ee e8 c8 8a 38 fa 45 85 ed 75 1b e8 ae 89 38 fa [ 40.509240] RSP: 0018:ffff8801b91a7460 EFLAGS: 00010293 [ 40.514608] RAX: ffff8801d2f68400 RBX: ffff8801b9328040 RCX: ffffffff8746d9c6 [ 40.521863] RDX: 0000000000000000 RSI: ffffffff8746da3c RDI: 0000000000000004 [ 40.529144] RBP: ffff8801b91a7490 R08: ffff8801d2f68400 R09: ffffed003b5e5b67 [ 40.536413] R10: ffffed003b5e5b67 R11: ffff8801daf2db3b R12: 0000000000000000 [ 40.543680] R13: 000000000007165c R14: 000000000007165c R15: 0000000000000005 [ 40.550944] ? rds_message_alloc_sgs+0x96/0x160 [ 40.555599] ? rds_message_alloc_sgs+0x10c/0x160 [ 40.560348] rds_cmsg_rdma_args+0x82d/0x1510 [ 40.564759] ? __init_waitqueue_head+0x9e/0x150 [ 40.569428] ? init_wait_entry+0x1c0/0x1c0 [ 40.573664] ? rds_rdma_extra_size+0x310/0x310 [ 40.578249] ? rds_message_next_extension+0x220/0x220 [ 40.583443] ? rds_conn_create_outgoing+0x49/0x60 [ 40.588298] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 40.593488] rds_sendmsg+0x19a2/0x3180 [ 40.597375] ? kernel_poison_pages+0xb0/0x290 [ 40.601865] ? rds_send_drop_to+0x19d0/0x19d0 [ 40.606348] ? find_held_lock+0x36/0x1c0 [ 40.609628] kobject: 'regulatory.0' (0000000014c4b0c0): kobject_uevent_env [ 40.610403] ? zap_class+0x640/0x640 [ 40.610423] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.610452] ? check_preemption_disabled+0x48/0x280 [ 40.617544] kobject: 'regulatory.0' (0000000014c4b0c0): fill_kobj_path: path = '/devices/platform/regulatory.0' [ 40.621246] ? find_held_lock+0x36/0x1c0 [ 40.621280] ? __might_fault+0x12b/0x1e0 [ 40.621297] ? lock_downgrade+0x900/0x900 [ 40.621317] ? lock_release+0xa00/0xa00 [ 40.658263] ? perf_trace_sched_process_exec+0x860/0x860 [ 40.663720] ? usercopy_warn+0x110/0x110 [ 40.667768] ? sock_kmalloc+0x15a/0x1f0 [ 40.671743] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 40.676941] ? smack_socket_sendmsg+0xb0/0x190 [ 40.681520] ? rds_send_drop_to+0x19d0/0x19d0 [ 40.686005] sock_sendmsg+0xd5/0x120 [ 40.689705] ? rds_send_drop_to+0x19d0/0x19d0 [ 40.694185] ? sock_sendmsg+0xd5/0x120 [ 40.698060] ___sys_sendmsg+0x7fd/0x930 [ 40.702037] ? copy_msghdr_from_user+0x580/0x580 [ 40.706880] ? __fd_install+0x2b5/0x8f0 [ 40.710855] ? check_preemption_disabled+0x48/0x280 [ 40.715881] ? __fget_light+0x2e9/0x430 [ 40.719856] ? fget_raw+0x20/0x20 [ 40.723313] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.728838] ? __fd_install+0x2f9/0x8f0 [ 40.732838] ? get_unused_fd_flags+0x1a0/0x1a0 [ 40.737415] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 40.742957] ? sockfd_lookup_light+0xc5/0x160 [ 40.747441] __sys_sendmsg+0x11d/0x280 [ 40.751320] ? __ia32_sys_shutdown+0x80/0x80 [ 40.755722] ? __x64_sys_futex+0x47f/0x6a0 [ 40.759944] ? do_syscall_64+0x9a/0x820 [ 40.763905] ? do_syscall_64+0x9a/0x820 [ 40.767885] ? trace_hardirqs_off_caller+0x310/0x310 [ 40.772992] __x64_sys_sendmsg+0x78/0xb0 [ 40.777054] do_syscall_64+0x1b9/0x820 [ 40.780930] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 40.786287] ? syscall_return_slowpath+0x5e0/0x5e0 [ 40.791203] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.796033] ? trace_hardirqs_on_caller+0x310/0x310 [ 40.801036] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 40.806044] ? prepare_exit_to_usermode+0x291/0x3b0 [ 40.811056] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.815889] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.821064] RIP: 0033:0x44a1c9 [ 40.824242] Code: e8 6c b4 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 4b cd fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 40.843145] RSP: 002b:00007fe943d40da8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 40.850843] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 000000000044a1c9 [ 40.858114] RDX: 0000000000000000 RSI: 0000000020001600 RDI: 0000000000000005 [ 40.865367] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 40.872631] R10: 00000000006dbc2c R11: 0000000000000246 R12: 00000000006dbc2c [ 40.879900] R13: 646e732f7665642f R14: 00007fe943d419c0 R15: 00000000006dbd2c [ 40.888171] Kernel Offset: disabled [ 40.891836] Rebooting in 86400 seconds..