[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.53' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 110.098969] ------------[ cut here ]------------ [ 110.110918] generic_make_request: Trying to write to read-only block-device loop7 (partno 0) [ 110.125612] WARNING: CPU: 1 PID: 9699 at block/blk-core.c:2183 generic_make_request_checks+0x17d9/0x22e0 [ 110.135239] Kernel panic - not syncing: panic_on_warn set ... [ 110.135239] [ 110.142610] CPU: 1 PID: 9699 Comm: syz-executor223 Not tainted 4.19.211-syzkaller #0 [ 110.150489] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 110.159842] Call Trace: [ 110.162436] dump_stack+0x1fc/0x2ef [ 110.166070] panic+0x26a/0x50e [ 110.169268] ? __warn_printk+0xf3/0xf3 [ 110.173164] ? generic_make_request_checks+0x17d9/0x22e0 [ 110.178621] ? __probe_kernel_read+0x130/0x1b0 [ 110.183205] ? __warn.cold+0x5/0x5a [ 110.186832] ? __warn+0xe4/0x200 [ 110.190205] ? generic_make_request_checks+0x17d9/0x22e0 [ 110.195658] __warn.cold+0x20/0x5a [ 110.199210] ? generic_make_request_checks+0x17d9/0x22e0 [ 110.204665] report_bug+0x262/0x2b0 [ 110.208297] do_error_trap+0x1d7/0x310 [ 110.212188] ? math_error+0x310/0x310 [ 110.215990] ? __irq_work_queue_local+0x101/0x160 [ 110.221271] ? irq_work_queue+0x29/0x80 [ 110.225257] ? error_entry+0x72/0xd0 [ 110.228973] ? trace_hardirqs_off_caller+0x6e/0x210 [ 110.233993] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 110.238845] invalid_op+0x14/0x20 [ 110.242306] RIP: 0010:generic_make_request_checks+0x17d9/0x22e0 [ 110.248361] Code: ca 0a 00 00 45 8b b6 1c 05 00 00 48 8d 74 24 68 48 89 ef e8 b9 14 06 00 48 c7 c7 00 29 b2 88 48 89 c6 44 89 f2 e8 4c 94 91 04 <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 [ 110.267261] RSP: 0018:ffff88809587f0b0 EFLAGS: 00010286 [ 110.272625] RAX: 0000000000000000 RBX: ffff8880aef97080 RCX: 0000000000000000 [ 110.279899] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1012b0fe08 [ 110.287166] RBP: ffff8880a23d9b80 R08: 0000000000000001 R09: 0000000000000000 [ 110.294433] R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880a23d9bb0 [ 110.301758] R13: ffff8880a23d9b88 R14: 0000000000000000 R15: 0000000000000000 [ 110.309047] ? vprintk_func+0x81/0x180 [ 110.312951] ? should_fail_bio.isra.0+0xa0/0xa0 [ 110.317632] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 110.322653] ? kmem_cache_alloc+0x315/0x370 [ 110.326991] generic_make_request+0x23f/0xdf0 [ 110.331501] ? blk_put_request+0x110/0x110 [ 110.335748] ? sb_mark_inode_writeback+0xc8/0x490 [ 110.340601] submit_bio+0xb1/0x430 [ 110.344148] ? generic_make_request+0xdf0/0xdf0 [ 110.348821] ? check_preemption_disabled+0x41/0x280 [ 110.353848] ? guard_bio_eod+0x2a0/0x650 [ 110.357915] submit_bh_wbc+0x5a7/0x760 [ 110.361810] __block_write_full_page+0x71a/0xf60 [ 110.366571] ? block_llseek+0xc0/0xc0 [ 110.370379] block_write_full_page+0x1f3/0x260 [ 110.374960] ? block_llseek+0xc0/0xc0 [ 110.378766] __writepage+0x5e/0xe0 [ 110.382312] write_cache_pages+0x802/0x12d0 [ 110.386642] ? tag_pages_for_writeback+0x2f0/0x2f0 [ 110.391582] ? clear_page_dirty_for_io+0xee0/0xee0 [ 110.396528] ? deref_stack_reg+0x134/0x1d0 [ 110.400768] ? get_reg+0x176/0x1f0 [ 110.404334] ? blkdev_readpages+0x30/0x30 [ 110.408492] generic_writepages+0xdb/0x150 [ 110.412735] ? dirty_poll_interval.part.0+0x30/0x30 [ 110.417752] ? mark_held_locks+0xf0/0xf0 [ 110.421829] do_writepages+0xe5/0x290 [ 110.425637] ? page_writeback_cpu_online+0x10/0x10 [ 110.430571] ? do_raw_spin_unlock+0x171/0x230 [ 110.435067] ? _raw_spin_unlock+0x29/0x40 [ 110.439217] ? wbc_attach_and_unlock_inode+0x11d/0x9e0 [ 110.444500] __filemap_fdatawrite_range+0x27d/0x350 [ 110.449515] ? blkdev_put+0x30/0x520 [ 110.453229] ? delete_from_page_cache_batch+0xcc0/0xcc0 [ 110.458604] ? lock_downgrade+0x720/0x720 [ 110.462752] ? locks_remove_file+0x2c8/0x450 [ 110.467162] ? blkdev_put+0x30/0x520 [ 110.470877] ? blkdev_put+0x520/0x520 [ 110.474674] filemap_write_and_wait+0x42/0xd0 [ 110.479167] __blkdev_put+0x682/0x870 [ 110.482974] ? fsync_bdev+0xc0/0xc0 [ 110.486598] ? locks_remove_file+0x2cd/0x450 [ 110.491007] ? blkdev_put+0x85/0x520 [ 110.494721] ? blkdev_put+0x520/0x520 [ 110.498520] blkdev_close+0x86/0xb0 [ 110.502158] __fput+0x2ce/0x890 [ 110.505448] task_work_run+0x148/0x1c0 [ 110.509344] do_exit+0xbf3/0x2be0 [ 110.512800] ? futex_wake+0x159/0x480 [ 110.516608] ? mm_update_next_owner+0x650/0x650 [ 110.521286] ? get_signal+0x388/0x1f70 [ 110.525184] ? lock_downgrade+0x720/0x720 [ 110.529335] ? lock_acquire+0x170/0x3c0 [ 110.533314] do_group_exit+0x125/0x310 [ 110.537209] get_signal+0x3f2/0x1f70 [ 110.540929] ? splice_direct_to_actor+0x8d0/0x8d0 [ 110.545779] do_signal+0x8f/0x1670 [ 110.549320] ? blkdev_fallocate+0x3f0/0x3f0 [ 110.553644] ? do_vfs_ioctl+0x110/0x12e0 [ 110.557710] ? setup_sigcontext+0x820/0x820 [ 110.562033] ? ioctl_preallocate+0x200/0x200 [ 110.566445] ? __fget+0x356/0x510 [ 110.569907] ? __se_sys_futex+0x28f/0x3b0 [ 110.574059] ? __se_sys_futex+0x298/0x3b0 [ 110.578233] ? do_futex+0x1880/0x1880 [ 110.582036] ? exit_to_usermode_loop+0x36/0x2a0 [ 110.586714] exit_to_usermode_loop+0x204/0x2a0 [ 110.591299] do_syscall_64+0x538/0x620 [ 110.595194] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 110.600383] RIP: 0033:0x7fd8018b12a9 [ 110.604095] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 110.622996] RSP: 002b:00007fd80185e2f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 110.630708] RAX: fffffffffffffe00 RBX: 00007fd801934420 RCX: 00007fd8018b12a9 [ 110.637980] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fd801934428 [ 110.645249] RBP: 00007fd80193442c R08: 0000000000000000 R09: 0000000000000000 [ 110.652520] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd801902074 [ 110.659793] R13: 6f6f6c2f7665642f R14: 658cceafaa0c7965 R15: 00007fd801934428 [ 110.667267] Kernel Offset: disabled [ 110.670927] Rebooting in 86400 seconds..