[ 69.889342][ T27] audit: type=1800 audit(1565574081.674:27): pid=10257 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 69.911167][ T27] audit: type=1800 audit(1565574081.674:28): pid=10257 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. [ 70.555469][ T27] audit: type=1800 audit(1565574082.394:29): pid=10257 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 [ 70.579110][ T27] audit: type=1800 audit(1565574082.404:30): pid=10257 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 '10.128.0.103' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 81.322008][T10413] ================================================================== [ 81.330112][T10413] BUG: KASAN: null-ptr-deref in rxrpc_unuse_local+0x23/0x70 [ 81.337384][T10413] Write of size 4 at addr 0000000000000010 by task syz-executor503/10413 [ 81.345768][T10413] [ 81.348087][T10413] CPU: 1 PID: 10413 Comm: syz-executor503 Not tainted 5.3.0-rc3+ #158 [ 81.356226][T10413] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 81.366371][T10413] Call Trace: [ 81.369658][T10413] dump_stack+0x172/0x1f0 [ 81.373984][T10413] ? rxrpc_unuse_local+0x23/0x70 [ 81.378900][T10413] ? rxrpc_unuse_local+0x23/0x70 [ 81.383823][T10413] __kasan_report.cold+0x5/0x36 [ 81.388671][T10413] ? _raw_read_unlock_irqrestore+0xc1/0xe0 [ 81.394452][T10413] ? rxrpc_unuse_local+0x23/0x70 [ 81.399376][T10413] kasan_report+0x12/0x17 [ 81.403685][T10413] check_memory_region+0x134/0x1a0 [ 81.408772][T10413] __kasan_check_write+0x14/0x20 [ 81.413684][T10413] rxrpc_unuse_local+0x23/0x70 [ 81.418429][T10413] rxrpc_release+0x47d/0x840 [ 81.422999][T10413] __sock_release+0xce/0x280 [ 81.427584][T10413] sock_close+0x1e/0x30 [ 81.431749][T10413] __fput+0x2ff/0x890 [ 81.435707][T10413] ? __sock_release+0x280/0x280 [ 81.440538][T10413] ____fput+0x16/0x20 [ 81.444501][T10413] task_work_run+0x145/0x1c0 [ 81.449069][T10413] do_exit+0x92f/0x2e50 [ 81.453205][T10413] ? __sanitizer_cov_trace_const_cmp4+0x11/0x20 [ 81.459423][T10413] ? mm_update_next_owner+0x640/0x640 [ 81.464773][T10413] ? fd_install+0x4d/0x60 [ 81.469100][T10413] ? __sys_socket+0x180/0x220 [ 81.473784][T10413] ? move_addr_to_kernel+0x80/0x80 [ 81.478882][T10413] ? __ia32_sys_fallocate+0xf0/0xf0 [ 81.484057][T10413] do_group_exit+0x135/0x360 [ 81.488623][T10413] __x64_sys_exit_group+0x44/0x50 [ 81.493626][T10413] do_syscall_64+0xfd/0x6a0 [ 81.498110][T10413] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 81.503980][T10413] RIP: 0033:0x43ed68 [ 81.507856][T10413] Code: Bad RIP value. [ 81.511917][T10413] RSP: 002b:00007ffd912612b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 81.520303][T10413] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed68 [ 81.528395][T10413] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 81.536378][T10413] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 81.544327][T10413] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 81.552277][T10413] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 81.560235][T10413] ================================================================== [ 81.569267][T10413] Kernel panic - not syncing: panic_on_warn set ... [ 81.575856][T10413] CPU: 1 PID: 10413 Comm: syz-executor503 Tainted: G B 5.3.0-rc3+ #158 [ 81.585381][T10413] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 81.595415][T10413] Call Trace: [ 81.598690][T10413] dump_stack+0x172/0x1f0 [ 81.603003][T10413] panic+0x2dc/0x755 [ 81.606879][T10413] ? add_taint.cold+0x16/0x16 [ 81.611623][T10413] ? rxrpc_unuse_local+0x23/0x70 [ 81.616728][T10413] ? preempt_schedule+0x4b/0x60 [ 81.621557][T10413] ? ___preempt_schedule+0x16/0x20 [ 81.626647][T10413] ? trace_hardirqs_on+0x5e/0x240 [ 81.631652][T10413] ? rxrpc_unuse_local+0x23/0x70 [ 81.636568][T10413] end_report+0x47/0x4f [ 81.640704][T10413] ? rxrpc_unuse_local+0x23/0x70 [ 81.645628][T10413] __kasan_report.cold+0xe/0x36 [ 81.650468][T10413] ? _raw_read_unlock_irqrestore+0xc1/0xe0 [ 81.656250][T10413] ? rxrpc_unuse_local+0x23/0x70 [ 81.661169][T10413] kasan_report+0x12/0x17 [ 81.665482][T10413] check_memory_region+0x134/0x1a0 [ 81.670574][T10413] __kasan_check_write+0x14/0x20 [ 81.675493][T10413] rxrpc_unuse_local+0x23/0x70 [ 81.680235][T10413] rxrpc_release+0x47d/0x840 [ 81.684828][T10413] __sock_release+0xce/0x280 [ 81.689415][T10413] sock_close+0x1e/0x30 [ 81.693565][T10413] __fput+0x2ff/0x890 [ 81.697527][T10413] ? __sock_release+0x280/0x280 [ 81.702485][T10413] ____fput+0x16/0x20 [ 81.706477][T10413] task_work_run+0x145/0x1c0 [ 81.711240][T10413] do_exit+0x92f/0x2e50 [ 81.715377][T10413] ? __sanitizer_cov_trace_const_cmp4+0x11/0x20 [ 81.721701][T10413] ? mm_update_next_owner+0x640/0x640 [ 81.727054][T10413] ? fd_install+0x4d/0x60 [ 81.731376][T10413] ? __sys_socket+0x180/0x220 [ 81.736131][T10413] ? move_addr_to_kernel+0x80/0x80 [ 81.741511][T10413] ? __ia32_sys_fallocate+0xf0/0xf0 [ 81.746697][T10413] do_group_exit+0x135/0x360 [ 81.751267][T10413] __x64_sys_exit_group+0x44/0x50 [ 81.756267][T10413] do_syscall_64+0xfd/0x6a0 [ 81.760763][T10413] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 81.766628][T10413] RIP: 0033:0x43ed68 [ 81.770520][T10413] Code: Bad RIP value. [ 81.774559][T10413] RSP: 002b:00007ffd912612b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 81.782945][T10413] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed68 [ 81.790900][T10413] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 81.798848][T10413] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 81.806808][T10413] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 81.814770][T10413] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 81.823684][T10413] Kernel Offset: disabled [ 81.828002][T10413] Rebooting in 86400 seconds..