[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.50' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 57.305775][ T6811] ------------[ cut here ]------------ [ 57.313535][ T6811] generic_make_request: Trying to write to read-only block-device nullb0 (partno 0) [ 57.325461][ T6811] WARNING: CPU: 0 PID: 6811 at block/blk-core.c:852 generic_make_request_checks+0x1cb0/0x21c0 [ 57.335913][ T6811] Kernel panic - not syncing: panic_on_warn set ... [ 57.342623][ T6811] CPU: 0 PID: 6811 Comm: syz-executor309 Not tainted 5.8.0-rc3-syzkaller #0 [ 57.355264][ T6811] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.365820][ T6811] Call Trace: [ 57.369211][ T6811] dump_stack+0x18f/0x20d [ 57.373725][ T6811] panic+0x2e3/0x75c [ 57.378169][ T6811] ? __warn_printk+0xf3/0xf3 [ 57.382844][ T6811] ? generic_make_request_checks+0x1cb0/0x21c0 [ 57.389244][ T6811] ? smb2_readv_callback+0xf40/0x1360 [ 57.395067][ T6811] ? generic_make_request_checks+0x1cb0/0x21c0 [ 57.401215][ T6811] ? __warn.cold+0x5/0x45 [ 57.405552][ T6811] ? __warn+0xd6/0x1f2 [ 57.409621][ T6811] ? generic_make_request_checks+0x1cb0/0x21c0 [ 57.415927][ T6811] __warn.cold+0x20/0x45 [ 57.420312][ T6811] ? generic_make_request_checks+0x1cb0/0x21c0 [ 57.426481][ T6811] report_bug+0x1bd/0x210 [ 57.430829][ T6811] handle_bug+0x38/0x90 [ 57.435075][ T6811] ? __warn_printk+0xc6/0xf3 [ 57.440126][ T6811] exc_invalid_op+0x13/0x40 [ 57.444617][ T6811] asm_exc_invalid_op+0x12/0x20 [ 57.449459][ T6811] RIP: 0010:generic_make_request_checks+0x1cb0/0x21c0 [ 57.456883][ T6811] Code: 1a 05 00 00 44 8b ab ac 05 00 00 48 8d 74 24 70 48 89 ef e8 92 0f fe ff 48 c7 c7 20 9b 91 88 48 89 c6 44 89 ea e8 c2 ad c2 fd <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 80 3c 02 [ 57.477477][ T6811] RSP: 0018:ffffc90001477330 EFLAGS: 00010282 [ 57.483561][ T6811] RAX: 0000000000000000 RBX: ffff8880a134f000 RCX: 0000000000000000 [ 57.491743][ T6811] RDX: ffff8880a783a380 RSI: ffffffff815d4f87 RDI: fffff5200028ee58 [ 57.499983][ T6811] RBP: ffff8880a6bb2680 R08: 0000000000000001 R09: ffff8880ae6318e7 [ 57.508028][ T6811] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a6bb2688 [ 57.516066][ T6811] R13: 0000000000000000 R14: 0000000000000001 R15: ffff8880a134b080 [ 57.524053][ T6811] ? vprintk_func+0x97/0x1a6 [ 57.528658][ T6811] ? mark_lock+0xbc/0x1710 [ 57.533168][ T6811] ? __lock_acquire+0xc1e/0x56e0 [ 57.538554][ T6811] ? blk_update_request+0x1230/0x1230 [ 57.544459][ T6811] ? __lock_acquire+0xc1e/0x56e0 [ 57.549408][ T6811] generic_make_request+0x89/0xc00 [ 57.555367][ T6811] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 57.561335][ T6811] ? direct_make_request+0x670/0x670 [ 57.567234][ T6811] ? lock_acquire+0x1f1/0xad0 [ 57.573211][ T6811] ? lock_acquire+0x1f1/0xad0 [ 57.577952][ T6811] ? bio_truncate+0x70/0x70 [ 57.582437][ T6811] submit_bio+0x263/0x5b0 [ 57.588276][ T6811] ? generic_make_request+0xc00/0xc00 [ 57.593628][ T6811] ? lock_is_held_type+0xb0/0xe0 [ 57.598548][ T6811] submit_bh_wbc+0x68d/0x8e0 [ 57.603118][ T6811] __block_write_full_page+0x837/0x12e0 [ 57.608766][ T6811] ? __blkdev_direct_IO_simple+0x940/0x940 [ 57.614813][ T6811] block_write_full_page+0x214/0x270 [ 57.620075][ T6811] ? __blkdev_direct_IO_simple+0x940/0x940 [ 57.625963][ T6811] __writepage+0x60/0x170 [ 57.630277][ T6811] write_cache_pages+0x736/0x11b0 [ 57.635665][ T6811] ? tag_pages_for_writeback+0x420/0x420 [ 57.641293][ T6811] ? clear_page_dirty_for_io+0x920/0x920 [ 57.647166][ T6811] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 57.653153][ T6811] ? find_held_lock+0x2d/0x110 [ 57.657911][ T6811] ? __lock_acquire+0x16e3/0x56e0 [ 57.662958][ T6811] ? blkdev_readahead+0x20/0x20 [ 57.667790][ T6811] generic_writepages+0xe2/0x150 [ 57.672798][ T6811] ? write_cache_pages+0x11b0/0x11b0 [ 57.678067][ T6811] ? find_held_lock+0x2d/0x110 [ 57.682837][ T6811] ? wbc_attach_and_unlock_inode+0x11d/0x9d0 [ 57.688797][ T6811] do_writepages+0xec/0x290 [ 57.693373][ T6811] ? writeback_set_ratelimit+0x150/0x150 [ 57.699105][ T6811] ? do_raw_spin_lock+0x120/0x2b0 [ 57.704126][ T6811] ? do_raw_spin_unlock+0x171/0x230 [ 57.709325][ T6811] ? _raw_spin_unlock+0x24/0x40 [ 57.714417][ T6811] ? wbc_attach_and_unlock_inode+0x11d/0x9d0 [ 57.720381][ T6811] __filemap_fdatawrite_range+0x2a1/0x380 [ 57.726108][ T6811] ? lock_is_held_type+0xb0/0xe0 [ 57.731907][ T6811] ? delete_from_page_cache_batch+0xe20/0xe20 [ 57.738247][ T6811] ? lock_downgrade+0x820/0x820 [ 57.743194][ T6811] ? blkdev_put+0x30/0x520 [ 57.747590][ T6811] filemap_write_and_wait_range+0xe1/0x1c0 [ 57.753391][ T6811] __blkdev_put+0x69a/0x890 [ 57.757875][ T6811] ? fsync_bdev+0xd0/0xd0 [ 57.762182][ T6811] ? locks_remove_file+0x319/0x580 [ 57.767271][ T6811] ? blkdev_put+0x520/0x520 [ 57.771779][ T6811] ? blkdev_put+0x85/0x520 [ 57.776262][ T6811] ? blkdev_put+0x520/0x520 [ 57.780959][ T6811] blkdev_close+0x8c/0xb0 [ 57.786578][ T6811] __fput+0x33c/0x880 [ 57.790542][ T6811] task_work_run+0xdd/0x190 [ 57.795121][ T6811] do_exit+0xb72/0x2a40 [ 57.799455][ T6811] ? blkdev_ioctl+0xc9/0x6c0 [ 57.804544][ T6811] ? mm_update_next_owner+0x7a0/0x7a0 [ 57.809990][ T6811] do_group_exit+0x125/0x310 [ 57.814583][ T6811] __x64_sys_exit_group+0x3a/0x50 [ 57.819590][ T6811] do_syscall_64+0x60/0xe0 [ 57.823988][ T6811] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 57.829977][ T6811] RIP: 0033:0x43ee48 [ 57.833842][ T6811] Code: Bad RIP value. [ 57.838071][ T6811] RSP: 002b:00007fffdc072048 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 57.846459][ T6811] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ee48 [ 57.854417][ T6811] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 57.862809][ T6811] RBP: 00000000004be648 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 57.873080][ T6811] R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000001 [ 57.881216][ T6811] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 57.890924][ T6811] Kernel Offset: disabled [ 57.895481][ T6811] Rebooting in 86400 seconds..