[ 67.801424][ T27] audit: type=1800 audit(1565523157.236:27): pid=10074 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 67.854116][ T27] audit: type=1800 audit(1565523157.326:28): pid=10074 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 68.623583][ T27] audit: type=1800 audit(1565523158.096:29): pid=10074 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 [ 68.643894][ T27] audit: type=1800 audit(1565523158.096:30): pid=10074 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 '10.128.0.189' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 82.350427][T10229] ================================================================== [ 82.359347][T10229] BUG: KASAN: null-ptr-deref in rxrpc_unuse_local+0x23/0x70 [ 82.369723][T10229] Write of size 4 at addr 0000000000000010 by task syz-executor406/10229 [ 82.378105][T10229] [ 82.380414][T10229] CPU: 0 PID: 10229 Comm: syz-executor406 Not tainted 5.3.0-rc3+ #157 [ 82.388532][T10229] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 82.398668][T10229] Call Trace: [ 82.401942][T10229] dump_stack+0x172/0x1f0 [ 82.406256][T10229] ? rxrpc_unuse_local+0x23/0x70 [ 82.411174][T10229] ? rxrpc_unuse_local+0x23/0x70 [ 82.416085][T10229] __kasan_report.cold+0x5/0x36 [ 82.420912][T10229] ? _raw_read_unlock_irqrestore+0xc1/0xe0 [ 82.426722][T10229] ? rxrpc_unuse_local+0x23/0x70 [ 82.431663][T10229] kasan_report+0x12/0x17 [ 82.435971][T10229] check_memory_region+0x134/0x1a0 [ 82.441169][T10229] __kasan_check_write+0x14/0x20 [ 82.446094][T10229] rxrpc_unuse_local+0x23/0x70 [ 82.450839][T10229] rxrpc_release+0x47d/0x840 [ 82.455464][T10229] __sock_release+0xce/0x280 [ 82.460086][T10229] sock_close+0x1e/0x30 [ 82.464283][T10229] __fput+0x2ff/0x890 [ 82.468247][T10229] ? __sock_release+0x280/0x280 [ 82.473089][T10229] ____fput+0x16/0x20 [ 82.477055][T10229] task_work_run+0x145/0x1c0 [ 82.481620][T10229] do_exit+0x92f/0x2e50 [ 82.485755][T10229] ? __sanitizer_cov_trace_const_cmp4+0x1/0x20 [ 82.491892][T10229] ? mm_update_next_owner+0x640/0x640 [ 82.497301][T10229] ? fd_install+0x4d/0x60 [ 82.501714][T10229] ? __sys_socket+0x180/0x220 [ 82.506475][T10229] ? move_addr_to_kernel+0x80/0x80 [ 82.511569][T10229] ? __ia32_sys_fallocate+0xf0/0xf0 [ 82.516745][T10229] do_group_exit+0x135/0x360 [ 82.521314][T10229] __x64_sys_exit_group+0x44/0x50 [ 82.526322][T10229] do_syscall_64+0xfd/0x6a0 [ 82.530814][T10229] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 82.536685][T10229] RIP: 0033:0x43ed68 [ 82.540563][T10229] Code: Bad RIP value. [ 82.544649][T10229] RSP: 002b:00007ffc44471ac8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 82.553044][T10229] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed68 [ 82.560998][T10229] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 82.569009][T10229] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 82.576963][T10229] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 82.584910][T10229] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 82.592960][T10229] ================================================================== [ 82.601649][T10229] Kernel panic - not syncing: panic_on_warn set ... [ 82.608229][T10229] CPU: 0 PID: 10229 Comm: syz-executor406 Tainted: G B 5.3.0-rc3+ #157 [ 82.617843][T10229] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 82.627877][T10229] Call Trace: [ 82.631151][T10229] dump_stack+0x172/0x1f0 [ 82.635468][T10229] panic+0x2dc/0x755 [ 82.639341][T10229] ? add_taint.cold+0x16/0x16 [ 82.644006][T10229] ? rxrpc_unuse_local+0x23/0x70 [ 82.648964][T10229] ? preempt_schedule+0x4b/0x60 [ 82.653795][T10229] ? ___preempt_schedule+0x16/0x20 [ 82.658997][T10229] ? trace_hardirqs_on+0x5e/0x240 [ 82.664082][T10229] ? rxrpc_unuse_local+0x23/0x70 [ 82.669000][T10229] end_report+0x47/0x4f [ 82.673134][T10229] ? rxrpc_unuse_local+0x23/0x70 [ 82.678046][T10229] __kasan_report.cold+0xe/0x36 [ 82.682881][T10229] ? _raw_read_unlock_irqrestore+0xc1/0xe0 [ 82.688778][T10229] ? rxrpc_unuse_local+0x23/0x70 [ 82.693699][T10229] kasan_report+0x12/0x17 [ 82.698010][T10229] check_memory_region+0x134/0x1a0 [ 82.703101][T10229] __kasan_check_write+0x14/0x20 [ 82.708018][T10229] rxrpc_unuse_local+0x23/0x70 [ 82.712767][T10229] rxrpc_release+0x47d/0x840 [ 82.717380][T10229] __sock_release+0xce/0x280 [ 82.721954][T10229] sock_close+0x1e/0x30 [ 82.726107][T10229] __fput+0x2ff/0x890 [ 82.730074][T10229] ? __sock_release+0x280/0x280 [ 82.734908][T10229] ____fput+0x16/0x20 [ 82.738875][T10229] task_work_run+0x145/0x1c0 [ 82.743438][T10229] do_exit+0x92f/0x2e50 [ 82.747570][T10229] ? __sanitizer_cov_trace_const_cmp4+0x1/0x20 [ 82.753715][T10229] ? mm_update_next_owner+0x640/0x640 [ 82.759072][T10229] ? fd_install+0x4d/0x60 [ 82.763403][T10229] ? __sys_socket+0x180/0x220 [ 82.768065][T10229] ? move_addr_to_kernel+0x80/0x80 [ 82.773162][T10229] ? __ia32_sys_fallocate+0xf0/0xf0 [ 82.778332][T10229] do_group_exit+0x135/0x360 [ 82.782895][T10229] __x64_sys_exit_group+0x44/0x50 [ 82.787980][T10229] do_syscall_64+0xfd/0x6a0 [ 82.792662][T10229] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 82.798527][T10229] RIP: 0033:0x43ed68 [ 82.802402][T10229] Code: Bad RIP value. [ 82.806444][T10229] RSP: 002b:00007ffc44471ac8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 82.814830][T10229] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed68 [ 82.822781][T10229] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 82.830779][T10229] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 82.838731][T10229] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 82.846676][T10229] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 82.855718][T10229] Kernel Offset: disabled [ 82.860037][T10229] Rebooting in 86400 seconds..