[ 76.782537][ T26] audit: type=1800 audit(1565592553.616:27): pid=10225 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 76.804537][ T26] audit: type=1800 audit(1565592553.626:28): pid=10225 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. [ 77.507602][ T26] audit: type=1800 audit(1565592554.416:29): pid=10225 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 [ 77.528018][ T26] audit: type=1800 audit(1565592554.416:30): pid=10225 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 '10.128.0.208' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 87.243071][T10378] ================================================================== [ 87.251287][T10378] BUG: KASAN: null-ptr-deref in rxrpc_unuse_local+0x23/0x70 [ 87.258553][T10378] Write of size 4 at addr 0000000000000010 by task syz-executor255/10378 [ 87.266942][T10378] [ 87.269254][T10378] CPU: 1 PID: 10378 Comm: syz-executor255 Not tainted 5.3.0-rc3-next-20190809 #63 [ 87.278579][T10378] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 87.288614][T10378] Call Trace: [ 87.291984][T10378] dump_stack+0x172/0x1f0 [ 87.296290][T10378] ? rxrpc_unuse_local+0x23/0x70 [ 87.301202][T10378] ? rxrpc_unuse_local+0x23/0x70 [ 87.306658][T10378] __kasan_report.cold+0x5/0x36 [ 87.311512][T10378] ? _raw_read_unlock_irqrestore+0xd1/0xe0 [ 87.317397][T10378] ? rxrpc_unuse_local+0x23/0x70 [ 87.322310][T10378] kasan_report+0x12/0x17 [ 87.326617][T10378] check_memory_region+0x134/0x1a0 [ 87.331755][T10378] __kasan_check_write+0x14/0x20 [ 87.336669][T10378] rxrpc_unuse_local+0x23/0x70 [ 87.341412][T10378] rxrpc_release+0x47d/0x840 [ 87.345988][T10378] __sock_release+0xce/0x280 [ 87.350579][T10378] sock_close+0x1e/0x30 [ 87.354719][T10378] __fput+0x2ff/0x890 [ 87.358717][T10378] ? __sock_release+0x280/0x280 [ 87.363542][T10378] ____fput+0x16/0x20 [ 87.367501][T10378] task_work_run+0x145/0x1c0 [ 87.372184][T10378] do_exit+0x92f/0x2e50 [ 87.376429][T10378] ? __sanitizer_cov_trace_cmp1+0x11/0x20 [ 87.382128][T10378] ? mm_update_next_owner+0x640/0x640 [ 87.387500][T10378] ? fd_install+0x4d/0x60 [ 87.391807][T10378] ? __sys_socket+0x180/0x220 [ 87.396572][T10378] ? move_addr_to_kernel+0x80/0x80 [ 87.401659][T10378] ? __ia32_sys_fallocate+0xf0/0xf0 [ 87.406858][T10378] do_group_exit+0x135/0x360 [ 87.411430][T10378] __x64_sys_exit_group+0x44/0x50 [ 87.416434][T10378] do_syscall_64+0xfa/0x760 [ 87.420917][T10378] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 87.426787][T10378] RIP: 0033:0x43ed68 [ 87.430675][T10378] Code: Bad RIP value. [ 87.434718][T10378] RSP: 002b:00007ffeaeede368 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 87.443105][T10378] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed68 [ 87.451052][T10378] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 87.459023][T10378] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 87.466979][T10378] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 87.474929][T10378] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 87.482882][T10378] ================================================================== [ 87.491278][T10378] Kernel panic - not syncing: panic_on_warn set ... [ 87.497876][T10378] CPU: 1 PID: 10378 Comm: syz-executor255 Tainted: G B 5.3.0-rc3-next-20190809 #63 [ 87.508518][T10378] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 87.518570][T10378] Call Trace: [ 87.521956][T10378] dump_stack+0x172/0x1f0 [ 87.526266][T10378] panic+0x2dc/0x755 [ 87.530240][T10378] ? add_taint.cold+0x16/0x16 [ 87.534896][T10378] ? rxrpc_unuse_local+0x23/0x70 [ 87.539862][T10378] ? preempt_schedule+0x4b/0x60 [ 87.544694][T10378] ? ___preempt_schedule+0x16/0x20 [ 87.549784][T10378] ? trace_hardirqs_on+0x5e/0x240 [ 87.554791][T10378] ? rxrpc_unuse_local+0x23/0x70 [ 87.559732][T10378] end_report+0x47/0x4f [ 87.563859][T10378] ? rxrpc_unuse_local+0x23/0x70 [ 87.568773][T10378] __kasan_report.cold+0xe/0x36 [ 87.573630][T10378] ? _raw_read_unlock_irqrestore+0xd1/0xe0 [ 87.579437][T10378] ? rxrpc_unuse_local+0x23/0x70 [ 87.584527][T10378] kasan_report+0x12/0x17 [ 87.588837][T10378] check_memory_region+0x134/0x1a0 [ 87.593931][T10378] __kasan_check_write+0x14/0x20 [ 87.598933][T10378] rxrpc_unuse_local+0x23/0x70 [ 87.603672][T10378] rxrpc_release+0x47d/0x840 [ 87.608244][T10378] __sock_release+0xce/0x280 [ 87.612822][T10378] sock_close+0x1e/0x30 [ 87.616960][T10378] __fput+0x2ff/0x890 [ 87.620922][T10378] ? __sock_release+0x280/0x280 [ 87.625809][T10378] ____fput+0x16/0x20 [ 87.629821][T10378] task_work_run+0x145/0x1c0 [ 87.634413][T10378] do_exit+0x92f/0x2e50 [ 87.638559][T10378] ? __sanitizer_cov_trace_cmp1+0x11/0x20 [ 87.644282][T10378] ? mm_update_next_owner+0x640/0x640 [ 87.649654][T10378] ? fd_install+0x4d/0x60 [ 87.653963][T10378] ? __sys_socket+0x180/0x220 [ 87.658615][T10378] ? move_addr_to_kernel+0x80/0x80 [ 87.663721][T10378] ? __ia32_sys_fallocate+0xf0/0xf0 [ 87.668939][T10378] do_group_exit+0x135/0x360 [ 87.673510][T10378] __x64_sys_exit_group+0x44/0x50 [ 87.681002][T10378] do_syscall_64+0xfa/0x760 [ 87.685513][T10378] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 87.691408][T10378] RIP: 0033:0x43ed68 [ 87.695388][T10378] Code: Bad RIP value. [ 87.699441][T10378] RSP: 002b:00007ffeaeede368 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 87.707920][T10378] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed68 [ 87.715876][T10378] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 87.723894][T10378] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 87.731867][T10378] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 87.739821][T10378] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 87.749186][T10378] Kernel Offset: disabled [ 87.753508][T10378] Rebooting in 86400 seconds..