Warning: Permanently added '10.128.0.91' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 60.645672] kauditd_printk_skb: 2 callbacks suppressed [ 60.645686] audit: type=1400 audit(1555606205.047:36): avc: denied { map } for pid=7631 comm="syz-executor871" path="/root/syz-executor871685127" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 60.651975] ------------[ cut here ]------------ [ 60.683123] generic_make_request: Trying to write to read-only block-device nullb0 (partno 0) [ 60.683626] audit: type=1400 audit(1555606205.047:37): avc: denied { map } for pid=7631 comm="syz-executor871" path="/dev/nullb0" dev="devtmpfs" ino=15771 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:device_t:s0 tclass=blk_file permissive=1 [ 60.693318] WARNING: CPU: 1 PID: 7631 at block/blk-core.c:2171 generic_make_request_checks+0x1fcf/0x24c0 [ 60.726312] Kernel panic - not syncing: panic_on_warn set ... [ 60.726312] [ 60.733675] CPU: 1 PID: 7631 Comm: syz-executor871 Not tainted 4.19.35 #3 [ 60.740845] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.750188] Call Trace: [ 60.752788] dump_stack+0x172/0x1f0 [ 60.756407] panic+0x263/0x51d [ 60.759589] ? __warn_printk+0xf3/0xf3 [ 60.763484] ? generic_make_request_checks+0x1fcf/0x24c0 [ 60.768924] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.774537] ? __warn.cold+0x5/0x54 [ 60.778160] ? __warn+0xe8/0x1d0 [ 60.781566] ? generic_make_request_checks+0x1fcf/0x24c0 [ 60.787002] __warn.cold+0x20/0x54 [ 60.790549] ? generic_make_request_checks+0x1fcf/0x24c0 [ 60.796537] report_bug+0x263/0x2b0 [ 60.800179] do_error_trap+0x204/0x360 [ 60.804083] ? math_error+0x340/0x340 [ 60.807873] ? wake_up_klogd+0x99/0xd0 [ 60.811748] ? vprintk_emit+0x264/0x690 [ 60.815712] ? vprintk_emit+0x1ab/0x690 [ 60.819774] ? error_entry+0x76/0xd0 [ 60.823480] ? trace_hardirqs_off_caller+0x65/0x220 [ 60.828575] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 60.833498] do_invalid_op+0x1b/0x20 [ 60.837362] invalid_op+0x14/0x20 [ 60.841126] RIP: 0010:generic_make_request_checks+0x1fcf/0x24c0 [ 60.847177] Code: 85 1f 04 00 00 45 8b b6 e4 04 00 00 48 8d 73 a0 4c 89 e7 e8 13 58 06 00 48 c7 c7 e0 fe 7f 87 48 89 c6 44 89 f2 e8 8f 01 30 fe <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 [ 60.866085] RSP: 0000:ffff88808af571e8 EFLAGS: 00010282 [ 60.871448] RAX: 0000000000000000 RBX: ffff88808af572b8 RCX: 0000000000000000 [ 60.878710] RDX: 0000000000000000 RSI: ffffffff8155cf26 RDI: ffffed10115eae2f [ 60.885970] RBP: ffff88808af572e0 R08: ffff8880a94ee3c0 R09: ffff8880a94eec60 [ 60.893229] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888093432340 [ 60.900484] R13: ffff888093432348 R14: 0000000000000000 R15: 0000000000000000 [ 60.907771] ? vprintk_func+0x86/0x189 [ 60.911674] ? generic_make_request_checks+0x1fcf/0x24c0 [ 60.917135] ? blk_queue_bypass_end+0x210/0x210 [ 60.921804] ? ___might_sleep+0x163/0x280 [ 60.925960] generic_make_request+0x24c/0x12d0 [ 60.930641] ? blk_get_request+0x720/0x720 [ 60.934863] ? guard_bio_eod+0x1da/0x660 [ 60.938922] ? find_held_lock+0x35/0x130 [ 60.942981] ? guard_bio_eod+0x1da/0x660 [ 60.947031] submit_bio+0xba/0x480 [ 60.950557] ? submit_bio+0xba/0x480 [ 60.954258] ? lock_downgrade+0x810/0x810 [ 60.958392] ? generic_make_request+0x12d0/0x12d0 [ 60.963237] ? kasan_check_read+0x11/0x20 [ 60.967380] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 60.972383] ? guard_bio_eod+0x2a1/0x660 [ 60.976453] submit_bh_wbc+0x5dc/0x790 [ 60.980343] __block_write_full_page+0x771/0x1020 [ 60.985183] ? check_disk_change+0x140/0x140 [ 60.989585] block_write_full_page+0x21f/0x270 [ 60.994171] ? check_disk_change+0x140/0x140 [ 60.998569] blkdev_writepage+0x25/0x30 [ 61.002543] __writepage+0x67/0xe0 [ 61.006075] write_cache_pages+0x974/0x1670 [ 61.010386] ? tag_pages_for_writeback+0x320/0x320 [ 61.015587] ? clear_page_dirty_for_io+0xff0/0xff0 [ 61.020521] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 61.025624] ? __lock_acquire+0x6eb/0x48f0 [ 61.029933] ? ep_poll_callback+0x78a/0xcb0 [ 61.034248] ? find_held_lock+0x35/0x130 [ 61.038300] ? __lock_acquire+0x6eb/0x48f0 [ 61.042528] generic_writepages+0xe6/0x160 [ 61.046750] ? write_cache_pages+0x1670/0x1670 [ 61.051324] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 61.056415] ? wbc_attach_and_unlock_inode+0x51a/0x930 [ 61.061680] ? find_held_lock+0x35/0x130 [ 61.065742] ? blkdev_readpages+0x40/0x40 [ 61.069883] blkdev_writepages+0x1e/0x30 [ 61.073942] do_writepages+0xf5/0x2a0 [ 61.077824] ? page_writeback_cpu_online+0x20/0x20 [ 61.082956] ? kasan_check_read+0x11/0x20 [ 61.087107] ? do_raw_spin_unlock+0x57/0x270 [ 61.091775] ? _raw_spin_unlock+0x2d/0x50 [ 61.096467] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 61.103134] ? wbc_attach_and_unlock_inode+0x5c4/0x930 [ 61.108408] __filemap_fdatawrite_range+0x26d/0x340 [ 61.113417] ? delete_from_page_cache_batch+0xec0/0xec0 [ 61.118775] ? fsnotify+0x885/0xf00 [ 61.122414] filemap_write_and_wait+0x47/0xd0 [ 61.126902] __blkdev_put+0x204/0x810 [ 61.130715] ? bd_set_size+0xb0/0xb0 [ 61.134421] ? wait_for_completion+0x440/0x440 [ 61.139004] blkdev_put+0x98/0x560 [ 61.142626] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 61.148152] ? blkdev_put+0x560/0x560 [ 61.152037] blkdev_close+0x8b/0xb0 [ 61.155657] __fput+0x2df/0x8b0 [ 61.158943] ____fput+0x16/0x20 [ 61.162212] task_work_run+0x14a/0x1c0 [ 61.166093] do_exit+0x933/0x2fa0 [ 61.169550] ? mm_update_next_owner+0x660/0x660 [ 61.174227] ? up_read+0x1a/0x110 [ 61.177670] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 61.183235] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 61.188778] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 61.193547] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 61.198290] do_group_exit+0x135/0x370 [ 61.202165] __x64_sys_exit_group+0x44/0x50 [ 61.206659] do_syscall_64+0x103/0x610 [ 61.210542] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 61.215722] RIP: 0033:0x43edf8 [ 61.218912] Code: Bad RIP value. [ 61.222349] RSP: 002b:00007fff511fd9e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 61.230053] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043edf8 [ 61.237309] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 61.244567] RBP: 00000000004be608 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 61.251827] R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000001 [ 61.259091] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 61.267670] Kernel Offset: disabled [ 61.271491] Rebooting in 86400 seconds..