[ 67.808379][ T24] audit: type=1800 audit(1565524770.392:27): pid=9873 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 67.828754][ T24] audit: type=1800 audit(1565524770.392:28): pid=9873 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. [ 68.544737][ T24] audit: type=1800 audit(1565524771.172:29): pid=9873 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 [ 68.565315][ T24] audit: type=1800 audit(1565524771.172:30): pid=9873 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 '10.128.0.171' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 77.467859][T10028] ================================================================== [ 77.477146][T10028] BUG: KASAN: null-ptr-deref in rxrpc_unuse_local+0x23/0x70 [ 77.484966][T10028] Write of size 4 at addr 0000000000000010 by task syz-executor913/10028 [ 77.495906][T10028] [ 77.498366][T10028] CPU: 0 PID: 10028 Comm: syz-executor913 Not tainted 5.3.0-rc3-next-20190809 #63 [ 77.507918][T10028] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.518852][T10028] Call Trace: [ 77.522236][T10028] dump_stack+0x172/0x1f0 [ 77.526570][T10028] ? rxrpc_unuse_local+0x23/0x70 [ 77.531732][T10028] ? rxrpc_unuse_local+0x23/0x70 [ 77.536906][T10028] __kasan_report.cold+0x5/0x36 [ 77.541931][T10028] ? _raw_read_unlock_irqrestore+0xd1/0xe0 [ 77.548060][T10028] ? rxrpc_unuse_local+0x23/0x70 [ 77.553002][T10028] kasan_report+0x12/0x17 [ 77.557586][T10028] check_memory_region+0x134/0x1a0 [ 77.563368][T10028] __kasan_check_write+0x14/0x20 [ 77.568855][T10028] rxrpc_unuse_local+0x23/0x70 [ 77.574204][T10028] rxrpc_release+0x47d/0x840 [ 77.578980][T10028] __sock_release+0xce/0x280 [ 77.584015][T10028] sock_close+0x1e/0x30 [ 77.588253][T10028] __fput+0x2ff/0x890 [ 77.592230][T10028] ? __sock_release+0x280/0x280 [ 77.597170][T10028] ____fput+0x16/0x20 [ 77.601309][T10028] task_work_run+0x145/0x1c0 [ 77.606286][T10028] do_exit+0x92f/0x2e50 [ 77.610696][T10028] ? __sanitizer_cov_trace_cmp1+0x11/0x20 [ 77.616646][T10028] ? mm_update_next_owner+0x640/0x640 [ 77.622559][T10028] ? fd_install+0x4d/0x60 [ 77.626991][T10028] ? __sys_socket+0x180/0x220 [ 77.632042][T10028] ? move_addr_to_kernel+0x80/0x80 [ 77.637309][T10028] ? __ia32_sys_fallocate+0xf0/0xf0 [ 77.642777][T10028] do_group_exit+0x135/0x360 [ 77.647589][T10028] __x64_sys_exit_group+0x44/0x50 [ 77.654098][T10028] do_syscall_64+0xfa/0x760 [ 77.659066][T10028] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.665612][T10028] RIP: 0033:0x43ed68 [ 77.669701][T10028] Code: Bad RIP value. [ 77.673932][T10028] RSP: 002b:00007ffc1b646538 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 77.682855][T10028] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed68 [ 77.691815][T10028] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 77.699901][T10028] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 77.708065][T10028] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 77.716207][T10028] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 77.724445][T10028] ================================================================== [ 77.733385][T10028] Kernel panic - not syncing: panic_on_warn set ... [ 77.740287][T10028] CPU: 0 PID: 10028 Comm: syz-executor913 Tainted: G B 5.3.0-rc3-next-20190809 #63 [ 77.751702][T10028] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.762044][T10028] Call Trace: [ 77.765345][T10028] dump_stack+0x172/0x1f0 [ 77.769828][T10028] panic+0x2dc/0x755 [ 77.773720][T10028] ? add_taint.cold+0x16/0x16 [ 77.778745][T10028] ? rxrpc_unuse_local+0x23/0x70 [ 77.784116][T10028] ? preempt_schedule+0x4b/0x60 [ 77.789279][T10028] ? ___preempt_schedule+0x16/0x20 [ 77.794517][T10028] ? trace_hardirqs_on+0x5e/0x240 [ 77.799749][T10028] ? rxrpc_unuse_local+0x23/0x70 [ 77.804905][T10028] end_report+0x47/0x4f [ 77.809142][T10028] ? rxrpc_unuse_local+0x23/0x70 [ 77.814391][T10028] __kasan_report.cold+0xe/0x36 [ 77.819402][T10028] ? _raw_read_unlock_irqrestore+0xd1/0xe0 [ 77.825455][T10028] ? rxrpc_unuse_local+0x23/0x70 [ 77.830470][T10028] kasan_report+0x12/0x17 [ 77.835249][T10028] check_memory_region+0x134/0x1a0 [ 77.840864][T10028] __kasan_check_write+0x14/0x20 [ 77.845898][T10028] rxrpc_unuse_local+0x23/0x70 [ 77.851374][T10028] rxrpc_release+0x47d/0x840 [ 77.856235][T10028] __sock_release+0xce/0x280 [ 77.861357][T10028] sock_close+0x1e/0x30 [ 77.865709][T10028] __fput+0x2ff/0x890 [ 77.869858][T10028] ? __sock_release+0x280/0x280 [ 77.875065][T10028] ____fput+0x16/0x20 [ 77.879038][T10028] task_work_run+0x145/0x1c0 [ 77.883792][T10028] do_exit+0x92f/0x2e50 [ 77.888178][T10028] ? __sanitizer_cov_trace_cmp1+0x11/0x20 [ 77.893893][T10028] ? mm_update_next_owner+0x640/0x640 [ 77.899659][T10028] ? fd_install+0x4d/0x60 [ 77.903985][T10028] ? __sys_socket+0x180/0x220 [ 77.909006][T10028] ? move_addr_to_kernel+0x80/0x80 [ 77.914227][T10028] ? __ia32_sys_fallocate+0xf0/0xf0 [ 77.919839][T10028] do_group_exit+0x135/0x360 [ 77.924429][T10028] __x64_sys_exit_group+0x44/0x50 [ 77.929640][T10028] do_syscall_64+0xfa/0x760 [ 77.934290][T10028] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.940430][T10028] RIP: 0033:0x43ed68 [ 77.944338][T10028] Code: Bad RIP value. [ 77.948475][T10028] RSP: 002b:00007ffc1b646538 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 77.957301][T10028] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed68 [ 77.966294][T10028] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 77.974735][T10028] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 77.982900][T10028] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 77.991442][T10028] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 78.002463][T10028] Kernel Offset: disabled [ 78.007130][T10028] Rebooting in 86400 seconds..