Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.188' (ECDSA) to the list of known hosts. syzkaller login: [ 37.767167] IPVS: ftp: loaded support on port[0] = 21 [ 37.822454] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 37.839634] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 37.854759] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 executing program [ 37.873257] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 37.886993] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready [ 37.893526] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 37.900623] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 37.907860] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 37.931859] ------------[ cut here ]------------ [ 37.937627] generic_make_request: Trying to write to read-only block-device loop0 (partno 0) [ 37.947570] WARNING: CPU: 1 PID: 8146 at block/blk-core.c:2183 generic_make_request_checks+0x17d9/0x22e0 [ 37.957276] Kernel panic - not syncing: panic_on_warn set ... [ 37.957276] [ 37.964622] CPU: 1 PID: 8146 Comm: syz-executor410 Not tainted 4.19.192-syzkaller #0 [ 37.972498] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.981832] Call Trace: [ 37.984404] dump_stack+0x1fc/0x2ef [ 37.988119] panic+0x26a/0x50e [ 37.991299] ? __warn_printk+0xf3/0xf3 [ 37.995187] ? generic_make_request_checks+0x17d9/0x22e0 [ 38.000631] ? __probe_kernel_read+0x130/0x1b0 [ 38.005196] ? __warn.cold+0x5/0x5a [ 38.008813] ? __warn+0xe4/0x200 [ 38.012174] ? generic_make_request_checks+0x17d9/0x22e0 [ 38.017608] __warn.cold+0x20/0x5a [ 38.021150] ? generic_make_request_checks+0x17d9/0x22e0 [ 38.026585] report_bug+0x262/0x2b0 [ 38.030284] do_error_trap+0x1d7/0x310 [ 38.034167] ? math_error+0x310/0x310 [ 38.037954] ? __irq_work_queue_local+0x101/0x160 [ 38.042781] ? irq_work_queue+0x29/0x80 [ 38.046739] ? error_entry+0x72/0xd0 [ 38.050442] ? trace_hardirqs_off_caller+0x6e/0x210 [ 38.055466] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.060295] invalid_op+0x14/0x20 [ 38.063743] RIP: 0010:generic_make_request_checks+0x17d9/0x22e0 [ 38.069779] Code: ca 0a 00 00 45 8b b6 e4 04 00 00 48 8d 74 24 68 48 89 ef e8 b9 14 06 00 48 c7 c7 00 23 b2 88 48 89 c6 44 89 f2 e8 87 97 90 04 <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 [ 38.088663] RSP: 0018:ffff8880951370b0 EFLAGS: 00010286 [ 38.094011] RAX: 0000000000000000 RBX: ffff8880aef0c040 RCX: 0000000000000000 [ 38.101263] RDX: 0000000000000000 RSI: ffffffff814df6b1 RDI: ffffed1012a26e08 [ 38.108510] RBP: ffff8880a02e4b80 R08: 0000000000000001 R09: 0000000000000000 [ 38.115771] R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880a02e4bb0 [ 38.123024] R13: ffff8880a02e4b88 R14: 0000000000000000 R15: 0000000000000000 [ 38.130304] ? vprintk_func+0x81/0x180 [ 38.134183] ? should_fail_bio.isra.0+0xa0/0xa0 [ 38.138847] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 38.143847] ? kmem_cache_alloc+0x315/0x370 [ 38.148153] generic_make_request+0x23f/0xdf0 [ 38.152635] ? blk_put_request+0x110/0x110 [ 38.156854] ? sb_mark_inode_writeback+0xc8/0x490 [ 38.161767] submit_bio+0xb1/0x430 [ 38.165300] ? generic_make_request+0xdf0/0xdf0 [ 38.169964] ? check_preemption_disabled+0x41/0x280 [ 38.174965] ? guard_bio_eod+0x2a0/0x650 [ 38.179006] submit_bh_wbc+0x5a7/0x760 [ 38.182886] __block_write_full_page+0x71a/0xf60 [ 38.187625] ? block_llseek+0xc0/0xc0 [ 38.191406] block_write_full_page+0x1f3/0x260 [ 38.195967] ? block_llseek+0xc0/0xc0 [ 38.199760] __writepage+0x5e/0xe0 [ 38.203292] write_cache_pages+0x802/0x12d0 [ 38.207595] ? tag_pages_for_writeback+0x2f0/0x2f0 [ 38.212511] ? clear_page_dirty_for_io+0xee0/0xee0 [ 38.217434] ? __lock_acquire+0x1071/0x3ff0 [ 38.221745] ? lock_acquire+0x170/0x3c0 [ 38.225710] ? __lock_acquire+0x6de/0x3ff0 [ 38.229940] ? blkdev_readpages+0x30/0x30 [ 38.234085] generic_writepages+0xdb/0x150 [ 38.238311] ? dirty_poll_interval.part.0+0x30/0x30 [ 38.243309] ? mark_held_locks+0xf0/0xf0 [ 38.247374] do_writepages+0xe5/0x290 [ 38.251159] ? page_writeback_cpu_online+0x10/0x10 [ 38.256071] ? do_raw_spin_unlock+0x171/0x230 [ 38.260566] ? _raw_spin_unlock+0x29/0x40 [ 38.264716] ? wbc_attach_and_unlock_inode+0x11d/0x9e0 [ 38.269973] __filemap_fdatawrite_range+0x27d/0x350 [ 38.274995] ? delete_from_page_cache_batch+0xcc0/0xcc0 [ 38.280354] ? lock_downgrade+0x720/0x720 [ 38.284493] ? locks_remove_file+0x2c8/0x450 [ 38.288882] ? blkdev_put+0x30/0x520 [ 38.292579] ? blkdev_put+0x520/0x520 [ 38.296359] filemap_write_and_wait+0x42/0xd0 [ 38.300850] __blkdev_put+0x682/0x870 [ 38.304635] ? fsync_bdev+0xc0/0xc0 [ 38.308334] ? blkdev_put+0x85/0x520 [ 38.312032] ? blkdev_put+0x520/0x520 [ 38.315812] blkdev_close+0x86/0xb0 [ 38.319419] __fput+0x2ce/0x890 [ 38.322685] task_work_run+0x148/0x1c0 [ 38.326571] do_exit+0xbf3/0x2be0 [ 38.330007] ? futex_wake+0x159/0x480 [ 38.333801] ? mm_update_next_owner+0x650/0x650 [ 38.338465] ? get_signal+0x388/0x1f70 [ 38.342337] ? lock_downgrade+0x720/0x720 [ 38.346478] ? lock_acquire+0x170/0x3c0 [ 38.350446] do_group_exit+0x125/0x310 [ 38.354334] get_signal+0x3f2/0x1f70 [ 38.358055] do_signal+0x8f/0x1670 [ 38.361599] ? setup_sigcontext+0x820/0x820 [ 38.365901] ? vm_mmap_pgoff+0x1c0/0x200 [ 38.370028] ? vm_mmap_pgoff+0xe8/0x200 [ 38.373985] ? vma_is_stack_for_current+0xc0/0xc0 [ 38.378820] ? do_dup2+0x450/0x450 [ 38.382358] ? __se_sys_futex+0x28f/0x3b0 [ 38.386507] ? __se_sys_futex+0x298/0x3b0 [ 38.390668] ? do_futex+0x1880/0x1880 [ 38.394504] ? exit_to_usermode_loop+0x36/0x2a0 [ 38.399171] exit_to_usermode_loop+0x204/0x2a0 [ 38.403741] do_syscall_64+0x538/0x620 [ 38.407617] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 38.412799] RIP: 0033:0x452329 [ 38.415980] Code: Bad RIP value. [ 38.419335] RSP: 002b:00007fdf2139e218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 38.427033] RAX: 0000000000000001 RBX: 00000000004cc4d8 RCX: 0000000000452329 [ 38.434294] RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00000000004cc4dc [ 38.441554] RBP: 00000000004cc4d0 R08: 0000000000000000 R09: 0000000000000000 [ 38.448808] R10: 0000000000000003 R11: 0000000000000246 R12: 00000000004cc4dc [ 38.456057] R13: 00007fffe16e9d9f R14: 00007fdf2139e300 R15: 0000000000022000 [ 38.463951] Kernel Offset: disabled [ 38.467605] Rebooting in 86400 seconds..