[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 69.732956][ T26] kauditd_printk_skb: 8 callbacks suppressed [ 69.732970][ T26] audit: type=1400 audit(1574974248.711:41): avc: denied { map } for pid=9442 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.159' (ECDSA) to the list of known hosts. executing program [ 76.456263][ T26] audit: type=1400 audit(1574974255.441:42): avc: denied { map } for pid=9454 comm="syz-executor064" path="/root/syz-executor064770395" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 76.546401][ T26] audit: type=1804 audit(1574974255.531:43): pid=9454 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=open_writers comm="syz-executor064" name="/root/file0" dev="sda1" ino=16485 res=1 [ 76.573752][ T9454] ------------[ cut here ]------------ [ 76.579360][ T9454] generic_make_request: Trying to write to read-only block-device loop0 (partno 0) [ 76.589156][ T9454] WARNING: CPU: 1 PID: 9454 at block/blk-core.c:800 generic_make_request_checks+0x1c78/0x2190 [ 76.599404][ T9454] Kernel panic - not syncing: panic_on_warn set ... [ 76.605986][ T9454] CPU: 1 PID: 9454 Comm: syz-executor064 Not tainted 5.4.0-syzkaller #0 [ 76.614381][ T9454] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.624448][ T9454] Call Trace: [ 76.627723][ T9454] dump_stack+0x197/0x210 [ 76.632035][ T9454] ? generic_make_request_checks+0x1c60/0x2190 [ 76.638172][ T9454] panic+0x2e3/0x75c [ 76.642043][ T9454] ? add_taint.cold+0x16/0x16 [ 76.646708][ T9454] ? __kasan_check_write+0x14/0x20 [ 76.651809][ T9454] ? __warn.cold+0x14/0x3e [ 76.656205][ T9454] ? __warn+0xd9/0x1cf [ 76.660254][ T9454] ? generic_make_request_checks+0x1c78/0x2190 [ 76.667352][ T9454] __warn.cold+0x2f/0x3e [ 76.671573][ T9454] ? generic_make_request_checks+0x1c78/0x2190 [ 76.677706][ T9454] report_bug+0x289/0x300 [ 76.682013][ T9454] do_error_trap+0x11b/0x200 [ 76.686584][ T9454] do_invalid_op+0x37/0x50 [ 76.690978][ T9454] ? generic_make_request_checks+0x1c78/0x2190 [ 76.697111][ T9454] invalid_op+0x23/0x30 [ 76.701265][ T9454] RIP: 0010:generic_make_request_checks+0x1c78/0x2190 [ 76.708022][ T9454] Code: 00 00 44 8b ab 5c 05 00 00 48 8d b5 78 ff ff ff 4c 89 ff e8 5a 94 05 00 48 c7 c7 c0 47 05 88 48 89 c6 44 89 ea e8 a7 e4 0e fe <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 80 3c 02 [ 76.727621][ T9454] RSP: 0018:ffff888092bf71c0 EFLAGS: 00010286 [ 76.733674][ T9454] RAX: 0000000000000000 RBX: ffff8880a3506000 RCX: 0000000000000000 [ 76.741625][ T9454] RDX: 0000000000000000 RSI: ffffffff815dc196 RDI: ffffed101257ee2a [ 76.749580][ T9454] RBP: ffff888092bf72c0 R08: ffff8880965cc440 R09: ffffed1015d26621 [ 76.757530][ T9454] R10: ffffed1015d26620 R11: ffff8880ae933107 R12: ffff8880a8a39408 [ 76.765478][ T9454] R13: 0000000000000000 R14: 0000000000000001 R15: ffff8880a8a39400 [ 76.773444][ T9454] ? vprintk_func+0x86/0x189 [ 76.778019][ T9454] ? trace_event_raw_event_block_rq_requeue+0x640/0x640 [ 76.784949][ T9454] ? __kasan_check_read+0x11/0x20 [ 76.789951][ T9454] ? __lock_acquire+0x8a0/0x4a00 [ 76.794879][ T9454] ? __kasan_check_read+0x11/0x20 [ 76.799885][ T9454] generic_make_request+0x8f/0xb50 [ 76.804986][ T9454] ? blk_queue_enter+0xe30/0xe30 [ 76.809904][ T9454] ? lock_downgrade+0x920/0x920 [ 76.814733][ T9454] submit_bio+0x113/0x600 [ 76.819037][ T9454] ? submit_bio+0x113/0x600 [ 76.823520][ T9454] ? generic_make_request+0xb50/0xb50 [ 76.828983][ T9454] ? bio_associate_blkg_from_css+0x4fd/0x980 [ 76.834942][ T9454] ? bio_reset+0x3a0/0x3a0 [ 76.839340][ T9454] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 76.845038][ T9454] ? guard_bio_eod+0x28f/0x6c0 [ 76.849779][ T9454] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 76.855496][ T9454] submit_bh_wbc+0x6b6/0x900 [ 76.860080][ T9454] __block_write_full_page+0x7fe/0x11b0 [ 76.865621][ T9454] ? bdev_evict_inode+0x5c0/0x5c0 [ 76.870636][ T9454] ? __getblk_gfp+0xa10/0xa10 [ 76.875302][ T9454] block_write_full_page+0x21f/0x270 [ 76.880571][ T9454] ? bdev_evict_inode+0x5c0/0x5c0 [ 76.885579][ T9454] blkdev_writepage+0x25/0x30 [ 76.890251][ T9454] __writepage+0x66/0x110 [ 76.894566][ T9454] write_cache_pages+0x80c/0x13f0 [ 76.899686][ T9454] ? tag_pages_for_writeback+0x4b0/0x4b0 [ 76.905301][ T9454] ? clear_page_dirty_for_io+0xde0/0xde0 [ 76.910930][ T9454] ? rwsem_down_write_slowpath+0xbdf/0xf80 [ 76.916726][ T9454] ? lock_downgrade+0x920/0x920 [ 76.921563][ T9454] generic_writepages+0xed/0x160 [ 76.926482][ T9454] ? write_cache_pages+0x13f0/0x13f0 [ 76.931754][ T9454] ? wbc_attach_and_unlock_inode+0x515/0xa00 [ 76.937715][ T9454] ? find_held_lock+0x35/0x130 [ 76.942475][ T9454] ? blkdev_readpages+0x40/0x40 [ 76.947367][ T9454] blkdev_writepages+0x1e/0x30 [ 76.952116][ T9454] do_writepages+0xfa/0x2a0 [ 76.956611][ T9454] ? page_writeback_cpu_online+0x20/0x20 [ 76.962230][ T9454] ? do_raw_spin_unlock+0x178/0x270 [ 76.967411][ T9454] ? _raw_spin_unlock+0x28/0x40 [ 76.972241][ T9454] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 76.978464][ T9454] ? wbc_attach_and_unlock_inode+0x637/0xa00 [ 76.984425][ T9454] __filemap_fdatawrite_range+0x2bc/0x3b0 [ 76.990126][ T9454] ? delete_from_page_cache_batch+0xfe0/0xfe0 [ 76.996185][ T9454] ? lock_downgrade+0x920/0x920 [ 77.001027][ T9454] filemap_write_and_wait+0xf8/0x1e0 [ 77.006295][ T9454] __blkdev_put+0x204/0x810 [ 77.010794][ T9454] ? bd_set_size+0xb0/0xb0 [ 77.015198][ T9454] ? wait_for_completion+0x440/0x440 [ 77.020466][ T9454] blkdev_put+0x98/0x560 [ 77.024689][ T9454] blkdev_close+0x8b/0xb0 [ 77.029009][ T9454] __fput+0x2ff/0x890 [ 77.032969][ T9454] ? blkdev_put+0x560/0x560 [ 77.037452][ T9454] ____fput+0x16/0x20 [ 77.041498][ T9454] task_work_run+0x145/0x1c0 [ 77.046073][ T9454] do_exit+0x8e7/0x2e00 [ 77.050205][ T9454] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.056437][ T9454] ? mm_update_next_owner+0x7c0/0x7c0 [ 77.061788][ T9454] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 77.067754][ T9454] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 77.073201][ T9454] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 77.078640][ T9454] do_group_exit+0x135/0x360 [ 77.083218][ T9454] __x64_sys_exit_group+0x44/0x50 [ 77.088395][ T9454] do_syscall_64+0xfa/0x790 [ 77.092892][ T9454] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.098758][ T9454] RIP: 0033:0x443218 [ 77.102628][ T9454] Code: 6d 69 6e 67 2e 0a 00 73 65 6e 64 74 6f 28 29 20 65 72 72 6f 72 3a 20 25 64 20 3d 20 25 73 2e 0a 00 20 25 73 3a 25 73 2f 25 73 <0a> 00 61 63 74 69 6f 6e 66 6f 72 77 61 72 64 64 65 66 61 75 6c 74 [ 77.122209][ T9454] RSP: 002b:00007ffc531f1af8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 77.130594][ T9454] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000443218 [ 77.138553][ T9454] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 77.146504][ T9454] RBP: 00000000004c29e8 R08: 00000000000000e7 R09: ffffffffffffffd4 [ 77.154466][ T9454] R10: 0000000000400eb0 R11: 0000000000000246 R12: 0000000000000001 [ 77.162698][ T9454] R13: 00000000006d41a0 R14: 0000000000000000 R15: 0000000000000000 [ 77.172186][ T9454] Kernel Offset: disabled [ 77.176575][ T9454] Rebooting in 86400 seconds..