[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 75.864198][ T26] kauditd_printk_skb: 4 callbacks suppressed [ 75.864212][ T26] audit: type=1800 audit(1560245388.550:29): pid=9176 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 [ 75.892084][ T26] audit: type=1800 audit(1560245388.550:30): pid=9176 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 [....] startpar: service(s) returned failure: ssh ...[?25l[?1c7[FAIL8[?25h[?0c failed! Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.161' (ECDSA) to the list of known hosts. syzkaller login: [ 122.553309][ T9362] IPVS: ftp: loaded support on port[0] = 21 [ 122.554016][ T9363] IPVS: ftp: loaded support on port[0] = 21 [ 122.573256][ T9364] IPVS: ftp: loaded support on port[0] = 21 [ 122.575791][ T9360] IPVS: ftp: loaded support on port[0] = 21 [ 122.587477][ T9359] IPVS: ftp: loaded support on port[0] = 21 [ 122.597211][ T9361] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 133.983669][T11671] ------------[ cut here ]------------ [ 133.993974][T11671] generic_make_request: Trying to write to read-only block-device nullb0 (partno 0) [ 134.009875][T11671] WARNING: CPU: 0 PID: 11671 at block/blk-core.c:758 generic_make_request_checks+0x1c0c/0x2070 [ 134.020383][T11671] Kernel panic - not syncing: panic_on_warn set ... executing program executing program [ 134.027093][T11671] CPU: 0 PID: 11671 Comm: syz-executor427 Not tainted 5.2.0-rc4+ #26 [ 134.035382][T11671] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 134.045546][T11671] Call Trace: [ 134.048863][T11671] dump_stack+0x172/0x1f0 [ 134.053193][T11671] ? generic_make_request_checks+0x1b90/0x2070 [ 134.059652][T11671] panic+0x2cb/0x744 [ 134.063566][T11671] ? __warn_printk+0xf3/0xf3 [ 134.068167][T11671] ? generic_make_request_checks+0x1c0c/0x2070 [ 134.074379][T11671] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 134.080794][T11671] ? __warn.cold+0x5/0x4d [ 134.085115][T11671] ? __warn+0xe8/0x1d0 [ 134.089216][T11671] ? generic_make_request_checks+0x1c0c/0x2070 [ 134.095682][T11671] __warn.cold+0x20/0x4d [ 134.099969][T11671] ? vprintk_emit+0x1ea/0x700 [ 134.105198][T11671] ? generic_make_request_checks+0x1c0c/0x2070 [ 134.111376][T11671] report_bug+0x263/0x2b0 [ 134.115826][T11671] do_error_trap+0x11b/0x200 [ 134.120478][T11671] do_invalid_op+0x37/0x50 [ 134.125040][T11671] ? generic_make_request_checks+0x1c0c/0x2070 [ 134.135939][T11671] invalid_op+0x14/0x20 [ 134.140321][T11671] RIP: 0010:generic_make_request_checks+0x1c0c/0x2070 [ 134.147117][T11671] Code: 00 00 44 8b ab b4 04 00 00 48 8d b5 78 ff ff ff 4c 89 ff e8 f6 76 05 00 48 c7 c7 a0 1b a3 87 48 89 c6 44 89 ea e8 92 71 21 fe <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 80 3c 02 [ 134.168134][T11671] RSP: 0018:ffff888086906f80 EFLAGS: 00010286 [ 134.174253][T11671] RAX: 0000000000000000 RBX: ffff8880a3023280 RCX: 0000000000000000 [ 134.182357][T11671] RDX: 0000000000000000 RSI: ffffffff815ac976 RDI: ffffed1010d20de2 [ 134.190538][T11671] RBP: ffff888086907080 R08: ffff88808b66c5c0 R09: ffffed1015d06011 [ 134.198720][T11671] R10: ffffed1015d06010 R11: ffff8880ae830087 R12: ffff888089b1f008 [ 134.207279][T11671] R13: 0000000000000000 R14: 0000000000000001 R15: ffff888089b1f000 [ 134.215374][T11671] ? vprintk_func+0x86/0x189 [ 134.219977][T11671] ? trace_event_raw_event_block_rq_requeue+0x640/0x640 [ 134.227100][T11671] ? mark_held_locks+0xf0/0xf0 [ 134.231873][T11671] generic_make_request+0x8f/0xb40 [ 134.237029][T11671] ? find_held_lock+0x35/0x130 [ 134.243658][T11671] ? bio_associate_blkg_from_css+0x4e5/0x990 [ 134.249761][T11671] ? blk_queue_enter+0xe90/0xe90 [ 134.254706][T11671] ? lock_downgrade+0x880/0x880 [ 134.259557][T11671] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 134.265813][T11671] submit_bio+0xba/0x480 [ 134.270085][T11671] ? submit_bio+0xba/0x480 [ 134.274765][T11671] ? generic_make_request+0xb40/0xb40 [ 134.280252][T11671] ? bio_reset+0x3b0/0x3b0 [ 134.284675][T11671] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 134.290503][T11671] ? guard_bio_eod+0x295/0x6c0 [ 134.295266][T11671] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 134.301625][T11671] ? wbc_account_io+0x17e/0x2a0 [ 134.306512][T11671] submit_bh_wbc+0x5f7/0x7f0 [ 134.311139][T11671] __block_write_full_page+0x76e/0x1020 [ 134.316774][T11671] ? check_disk_change+0x140/0x140 [ 134.321920][T11671] block_write_full_page+0x21f/0x270 [ 134.327220][T11671] ? check_disk_change+0x140/0x140 [ 134.332349][T11671] blkdev_writepage+0x25/0x30 [ 134.337066][T11671] __writepage+0x62/0xe0 [ 134.341345][T11671] write_cache_pages+0x7bf/0x1380 [ 134.346389][T11671] ? __wb_update_bandwidth+0x670/0x670 [ 134.352044][T11671] ? clear_page_dirty_for_io+0xdc0/0xdc0 [ 134.357706][T11671] ? __lock_acquire+0x54f/0x5490 [ 134.362654][T11671] ? mark_held_locks+0xf0/0xf0 [ 134.367442][T11671] ? is_bpf_text_address+0xac/0x170 [ 134.372669][T11671] ? __lock_acquire+0x54f/0x5490 [ 134.377616][T11671] generic_writepages+0xed/0x160 [ 134.382643][T11671] ? write_cache_pages+0x1380/0x1380 [ 134.387975][T11671] ? wbc_attach_and_unlock_inode+0x51a/0x930 [ 134.393992][T11671] ? find_held_lock+0x35/0x130 [ 134.398796][T11671] ? blkdev_readpages+0x40/0x40 [ 134.403683][T11671] blkdev_writepages+0x1e/0x30 [ 134.408710][T11671] do_writepages+0xfa/0x2a0 [ 134.413225][T11671] ? page_writeback_cpu_online+0x20/0x20 [ 134.418904][T11671] ? kasan_check_read+0x11/0x20 [ 134.423764][T11671] ? do_raw_spin_unlock+0x57/0x270 [ 134.428875][T11671] ? _raw_spin_unlock+0x2d/0x50 [ 134.433733][T11671] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 134.440021][T11671] ? wbc_attach_and_unlock_inode+0x5c4/0x930 [ 134.446128][T11671] __filemap_fdatawrite_range+0x26d/0x340 [ 134.451868][T11671] ? delete_from_page_cache_batch+0xf90/0xf90 [ 134.457953][T11671] filemap_write_and_wait+0x47/0xd0 [ 134.463159][T11671] __blkdev_put+0x204/0x810 [ 134.467772][T11671] ? bd_set_size+0xb0/0xb0 [ 134.472192][T11671] ? wait_for_completion+0x440/0x440 [ 134.477751][T11671] blkdev_put+0x98/0x560 [ 134.482011][T11671] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 134.488248][T11671] blkdev_close+0x8b/0xb0 [ 134.492678][T11671] __fput+0x2ff/0x890 [ 134.496655][T11671] ? blkdev_put+0x560/0x560 [ 134.501148][T11671] ____fput+0x16/0x20 [ 134.505123][T11671] task_work_run+0x145/0x1c0 [ 134.509708][T11671] do_exit+0x90a/0x2fa0 [ 134.513865][T11671] ? get_signal+0x387/0x24b0 [ 134.518484][T11671] ? mm_update_next_owner+0x640/0x640 [ 134.524244][T11671] ? kasan_check_write+0x14/0x20 [ 134.529203][T11671] ? _raw_spin_unlock_irq+0x28/0x90 [ 134.534425][T11671] ? get_signal+0x387/0x24b0 [ 134.539121][T11671] ? _raw_spin_unlock_irq+0x28/0x90 [ 134.544423][T11671] do_group_exit+0x135/0x370 [ 134.549045][T11671] get_signal+0x471/0x24b0 [ 134.553498][T11671] ? exit_robust_list+0x2c0/0x2c0 [ 134.558537][T11671] ? trace_hardirqs_off+0x62/0x220 [ 134.563649][T11671] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 134.569911][T11671] do_signal+0x87/0x1900 [ 134.574177][T11671] ? putname+0xef/0x130 [ 134.578650][T11671] ? putname+0xef/0x130 [ 134.582831][T11671] ? rcu_read_lock_sched_held+0x110/0x130 [ 134.588565][T11671] ? kmem_cache_free+0x222/0x260 [ 134.593600][T11671] ? setup_sigcontext+0x7d0/0x7d0 [ 134.598663][T11671] ? exit_to_usermode_loop+0x43/0x2c0 [ 134.604051][T11671] ? do_syscall_64+0x58e/0x680 [ 134.609023][T11671] ? exit_to_usermode_loop+0x43/0x2c0 [ 134.614456][T11671] ? lockdep_hardirqs_on+0x418/0x5d0 [ 134.620136][T11671] ? trace_hardirqs_on+0x67/0x220 [ 134.625216][T11671] exit_to_usermode_loop+0x244/0x2c0 [ 134.630515][T11671] do_syscall_64+0x58e/0x680 [ 134.635115][T11671] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 134.641034][T11671] RIP: 0033:0x4472a9 [ 134.644942][T11671] Code: e8 3c e6 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 ab 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 134.665427][T11671] RSP: 002b:00007fabc35a3db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 134.673834][T11671] RAX: fffffffffffffe00 RBX: 00000000006dcc28 RCX: 00000000004472a9 [ 134.681838][T11671] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dcc28 [ 134.689840][T11671] RBP: 00000000006dcc20 R08: 0000000000000000 R09: 0000000000000000 [ 134.697948][T11671] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc2c [ 134.705925][T11671] R13: 00007fffce9a306f R14: 00007fabc35a49c0 R15: 20c49ba5e353f7cf [ 134.715225][T11671] Kernel Offset: disabled [ 134.719656][T11671] Rebooting in 86400 seconds..