[ 22.328243] random: cc1: uninitialized urandom read (8 bytes read) [ 23.001404] IPVS: ftp: loaded support on port[0] = 21 [ 23.043990] bpfilter: read fail -512 invalid request 0 [ 43.679304] can: request_module (can-proto-0) failed. [ 43.688169] can: request_module (can-proto-0) failed. [ 45.339615] random: sshd: uninitialized urandom read (32 bytes read) [ 45.705917] random: sshd: uninitialized urandom read (32 bytes read) [ 45.842097] random: sshd: uninitialized urandom read (32 bytes read) [ 86.140487] random: crng init done Warning: Permanently added '10.128.10.48' (ECDSA) to the list of known hosts. [ 477.074206] ------------[ cut here ]------------ [ 477.079196] generic_make_request: Trying to write to read-only block-device loop0 (partno 0) [ 477.088060] WARNING: CPU: 0 PID: 6597 at block/blk-core.c:2161 generic_make_request_checks+0x114f/0x2140 [ 477.097680] Kernel panic - not syncing: panic_on_warn set ... [ 477.097680] [ 477.105028] CPU: 0 PID: 6597 Comm: syz-executor901 Not tainted 4.18.0-rc7-syzkaller #0 [ 477.113080] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 477.122456] Call Trace: [ 477.125091] dump_stack+0x16a/0x22a [ 477.128705] ? dump_stack_print_info.cold.2+0x48/0x48 [ 477.133957] panic+0x1c6/0x37d [ 477.137138] ? add_taint.cold.5+0x11/0x11 [ 477.141283] ? generic_make_request_checks+0x114f/0x2140 [ 477.146714] __warn.cold.8+0x120/0x16c [ 477.150627] ? vprintk_emit+0x302/0xad0 [ 477.154586] ? generic_make_request_checks+0x114f/0x2140 [ 477.160042] report_bug+0x1a4/0x200 [ 477.163708] do_error_trap+0x1fc/0x4d0 [ 477.167578] ? math_error+0x3e0/0x3e0 [ 477.171361] ? vprintk_default+0x1a/0x20 [ 477.175399] ? vprintk_func+0x22/0x53 [ 477.179175] ? printk+0x9a/0xc0 [ 477.182779] ? kmsg_dump_rewind_nolock+0xdf/0xdf [ 477.187547] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 477.192369] do_invalid_op+0x1b/0x20 [ 477.196093] invalid_op+0x14/0x20 [ 477.199529] RIP: 0010:generic_make_request_checks+0x114f/0x2140 [ 477.205567] Code: 48 89 ce 48 89 8d 40 fd ff ff 89 95 38 fd ff ff e8 f6 23 07 00 8b 95 38 fd ff ff 48 c7 c7 40 b3 f6 86 48 89 c6 e8 d1 2e 16 fe <0f> 0b 48 8b 8d 40 fd ff ff e9 7f f1 ff ff 4c 89 ef e8 eb 17 82 fe [ 477.224669] RSP: 0018:ffff8801c5e67650 EFLAGS: 00010286 [ 477.230376] RAX: 0000000000000000 RBX: 1ffff10038bcced3 RCX: 0000000000000000 [ 477.237628] RDX: 1ffff10038bcce6f RSI: 0000000000000001 RDI: 0000000000000286 [ 477.244879] RBP: ffff8801c5e67940 R08: fffffbfff0f7067d R09: 0000000000000000 [ 477.252133] R10: 0000000000000000 R11: dffffc0000000000 R12: ffff8801d448a140 [ 477.259388] R13: ffff8801d87702f0 R14: ffff8801d87702c0 R15: ffff8801d87702c8 [ 477.266729] ? kasan_check_read+0x11/0x20 [ 477.270925] ? rcu_is_watching+0x8c/0x150 [ 477.275069] ? kasan_check_read+0x11/0x20 [ 477.279202] ? blk_put_request+0x100/0x100 [ 477.283445] ? blk_queue_enter+0x890/0xa70 [ 477.287662] ? blk_exit_rl+0x60/0x60 [ 477.291368] ? __save_stack_trace+0x8d/0xf0 [ 477.295789] ? save_stack+0xa9/0xd0 [ 477.299395] ? save_stack+0x43/0xd0 [ 477.303001] ? kasan_kmalloc+0xc4/0xe0 [ 477.306872] ? kasan_slab_alloc+0x12/0x20 [ 477.310998] ? kmem_cache_alloc+0x12e/0x760 [ 477.315351] ? mempool_alloc+0x148/0x490 [ 477.319417] ? bio_alloc_bioset+0x1a5/0x600 [ 477.323929] ? blkdev_issue_flush+0xbc/0x2c0 [ 477.328364] ? blkdev_fsync+0x70/0xc0 [ 477.332176] ? vfs_fsync_range+0xf0/0x220 [ 477.336316] ? do_fsync+0x38/0x70 [ 477.339764] ? __x64_sys_fsync+0x2e/0x40 [ 477.343806] ? do_syscall_64+0x183/0x700 [ 477.347850] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 477.353246] ? lock_acquire+0x1e4/0x540 [ 477.357211] generic_make_request+0x22f/0x1720 [ 477.361819] ? is_bpf_text_address+0x81/0xe0 [ 477.366239] ? kernel_text_address+0x79/0xf0 [ 477.370625] ? blk_get_request+0x6f0/0x6f0 [ 477.374844] ? kasan_check_read+0x11/0x20 [ 477.378974] ? rcu_is_watching+0x8c/0x150 [ 477.383105] ? rcu_pm_notify+0xc0/0xc0 [ 477.386990] ? rcu_read_lock_sched_held+0x108/0x120 [ 477.392064] ? kmem_cache_alloc+0x5fa/0x760 [ 477.396391] ? rcu_note_context_switch+0x730/0x730 [ 477.401315] ? mempool_alloc_slab+0x3a/0x50 [ 477.405621] ? mempool_alloc_slab+0x3a/0x50 [ 477.409937] submit_bio+0x9f/0x400 [ 477.413457] ? submit_bio+0x9f/0x400 [ 477.417154] ? generic_make_request+0x1720/0x1720 [ 477.421996] ? init_wait_entry+0x1c0/0x1c0 [ 477.426221] submit_bio_wait+0x126/0x1d0 [ 477.430281] ? submit_bio_wait_endio+0x40/0x40 [ 477.434853] ? up_read+0x1a/0x110 [ 477.438298] blkdev_issue_flush+0x1e1/0x2c0 [ 477.442603] blkdev_fsync+0x70/0xc0 [ 477.446213] ? thaw_bdev+0x150/0x150 [ 477.449998] vfs_fsync_range+0xf0/0x220 [ 477.453961] do_fsync+0x38/0x70 [ 477.457233] __x64_sys_fsync+0x2e/0x40 [ 477.461102] do_syscall_64+0x183/0x700 [ 477.464982] ? syscall_return_slowpath+0x4e0/0x4e0 [ 477.469911] ? syscall_return_slowpath+0x215/0x4e0 [ 477.474823] ? retint_user+0x18/0x18 [ 477.478602] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 477.483437] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 477.488607] RIP: 0033:0x4449b9 [ 477.491774] Code: e8 fc b2 02 00 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 5b d4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 477.510899] RSP: 002b:00007ffd986cd488 EFLAGS: 00000246 ORIG_RAX: 000000000000004a [ 477.518590] RAX: ffffffffffffffda RBX: 00000000004a60d2 RCX: 00000000004449b9 [ 477.525839] RDX: 00000000004012a0 RSI: 0000000000000000 RDI: 0000000000000003 [ 477.533089] RBP: 0000000000074780 R08: 0000000001766880 R09: 00000000004002e0 [ 477.540338] R10: 000000000000000f R11: 0000000000000246 R12: 00000000004022a0 [ 477.547587] R13: 0000000000402330 R14: 0000000000000000 R15: 0000000000000000 [ 477.555967] Kernel Offset: disabled [ 477.559631] Rebooting in 86400 seconds..