[ 72.808374][ T26] audit: type=1800 audit(1565546721.715:25): pid=10310 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 72.848776][ T26] audit: type=1800 audit(1565546721.725:26): pid=10310 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 72.869965][ T26] audit: type=1800 audit(1565546721.725:27): pid=10310 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 72.916612][ T26] audit: type=1800 audit(1565546721.735:28): pid=10310 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. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.47' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 83.009839][T10463] ================================================================== [ 83.018861][T10463] BUG: KASAN: null-ptr-deref in rxrpc_unuse_local+0x23/0x70 [ 83.026185][T10463] Write of size 4 at addr 0000000000000010 by task syz-executor647/10463 [ 83.035164][T10463] [ 83.037495][T10463] CPU: 1 PID: 10463 Comm: syz-executor647 Not tainted 5.3.0-rc3+ #157 [ 83.045750][T10463] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.055854][T10463] Call Trace: [ 83.059145][T10463] dump_stack+0x172/0x1f0 [ 83.063581][T10463] ? rxrpc_unuse_local+0x23/0x70 [ 83.068523][T10463] ? rxrpc_unuse_local+0x23/0x70 [ 83.073468][T10463] __kasan_report.cold+0x5/0x36 [ 83.078326][T10463] ? _raw_read_unlock_irqrestore+0xc1/0xe0 [ 83.084243][T10463] ? rxrpc_unuse_local+0x23/0x70 [ 83.089185][T10463] kasan_report+0x12/0x17 [ 83.093516][T10463] check_memory_region+0x134/0x1a0 [ 83.098663][T10463] __kasan_check_write+0x14/0x20 [ 83.103623][T10463] rxrpc_unuse_local+0x23/0x70 [ 83.108387][T10463] rxrpc_release+0x47d/0x840 [ 83.113000][T10463] __sock_release+0xce/0x280 [ 83.117593][T10463] sock_close+0x1e/0x30 [ 83.121838][T10463] __fput+0x2ff/0x890 [ 83.125853][T10463] ? __sock_release+0x280/0x280 [ 83.130748][T10463] ____fput+0x16/0x20 [ 83.134969][T10463] task_work_run+0x145/0x1c0 [ 83.139564][T10463] do_exit+0x92f/0x2e50 [ 83.143838][T10463] ? __sanitizer_cov_trace_const_cmp4+0x1/0x20 [ 83.150001][T10463] ? mm_update_next_owner+0x640/0x640 [ 83.155405][T10463] ? fd_install+0x4d/0x60 [ 83.159738][T10463] ? __sys_socket+0x180/0x220 [ 83.164444][T10463] ? move_addr_to_kernel+0x80/0x80 [ 83.169600][T10463] ? __ia32_sys_fallocate+0xf0/0xf0 [ 83.174806][T10463] do_group_exit+0x135/0x360 [ 83.179396][T10463] __x64_sys_exit_group+0x44/0x50 [ 83.184427][T10463] do_syscall_64+0xfd/0x6a0 [ 83.188933][T10463] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 83.195187][T10463] RIP: 0033:0x43ed68 [ 83.199079][T10463] Code: Bad RIP value. [ 83.203240][T10463] RSP: 002b:00007ffdb88adc68 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 83.212717][T10463] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed68 [ 83.220682][T10463] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 83.228650][T10463] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 83.238375][T10463] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 83.246342][T10463] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 83.254321][T10463] ================================================================== [ 83.262911][T10463] Kernel panic - not syncing: panic_on_warn set ... [ 83.271379][T10463] CPU: 1 PID: 10463 Comm: syz-executor647 Tainted: G B 5.3.0-rc3+ #157 [ 83.280995][T10463] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.291321][T10463] Call Trace: [ 83.294621][T10463] dump_stack+0x172/0x1f0 [ 83.298940][T10463] panic+0x2dc/0x755 [ 83.302819][T10463] ? add_taint.cold+0x16/0x16 [ 83.307502][T10463] ? rxrpc_unuse_local+0x23/0x70 [ 83.312535][T10463] ? preempt_schedule+0x4b/0x60 [ 83.317390][T10463] ? ___preempt_schedule+0x16/0x20 [ 83.322503][T10463] ? trace_hardirqs_on+0x5e/0x240 [ 83.327643][T10463] ? rxrpc_unuse_local+0x23/0x70 [ 83.334537][T10463] end_report+0x47/0x4f [ 83.339003][T10463] ? rxrpc_unuse_local+0x23/0x70 [ 83.344122][T10463] __kasan_report.cold+0xe/0x36 [ 83.349114][T10463] ? _raw_read_unlock_irqrestore+0xc1/0xe0 [ 83.359648][T10463] ? rxrpc_unuse_local+0x23/0x70 [ 83.364593][T10463] kasan_report+0x12/0x17 [ 83.369543][T10463] check_memory_region+0x134/0x1a0 [ 83.375446][T10463] __kasan_check_write+0x14/0x20 [ 83.382633][T10463] rxrpc_unuse_local+0x23/0x70 [ 83.388858][T10463] rxrpc_release+0x47d/0x840 [ 83.396328][T10463] __sock_release+0xce/0x280 [ 83.401402][T10463] sock_close+0x1e/0x30 [ 83.405570][T10463] __fput+0x2ff/0x890 [ 83.409574][T10463] ? __sock_release+0x280/0x280 [ 83.414429][T10463] ____fput+0x16/0x20 [ 83.418695][T10463] task_work_run+0x145/0x1c0 [ 83.423475][T10463] do_exit+0x92f/0x2e50 [ 83.427752][T10463] ? __sanitizer_cov_trace_const_cmp4+0x1/0x20 [ 83.433933][T10463] ? mm_update_next_owner+0x640/0x640 [ 83.440201][T10463] ? fd_install+0x4d/0x60 [ 83.445212][T10463] ? __sys_socket+0x180/0x220 [ 83.453295][T10463] ? move_addr_to_kernel+0x80/0x80 [ 83.460060][T10463] ? __ia32_sys_fallocate+0xf0/0xf0 [ 83.465264][T10463] do_group_exit+0x135/0x360 [ 83.470168][T10463] __x64_sys_exit_group+0x44/0x50 [ 83.475310][T10463] do_syscall_64+0xfd/0x6a0 [ 83.480151][T10463] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 83.486074][T10463] RIP: 0033:0x43ed68 [ 83.489988][T10463] Code: Bad RIP value. [ 83.494063][T10463] RSP: 002b:00007ffdb88adc68 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 83.502770][T10463] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed68 [ 83.510768][T10463] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 83.518739][T10463] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 83.531401][T10463] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 83.539367][T10463] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 83.548441][T10463] Kernel Offset: disabled [ 83.552805][T10463] Rebooting in 86400 seconds..