[?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: [ 73.297785][ T25] kauditd_printk_skb: 8 callbacks suppressed [ 73.297799][ T25] audit: type=1400 audit(1574972098.658:41): avc: denied { map } for pid=9546 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 '10.128.0.22' (ECDSA) to the list of known hosts. executing program [ 144.321793][ T25] audit: type=1400 audit(1574972169.678:42): avc: denied { map } for pid=9558 comm="syz-executor865" path="/root/syz-executor865610100" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 144.418852][ T25] audit: type=1804 audit(1574972169.778:43): pid=9558 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-executor865" name="/root/syzkaller.IMHcuZ/file0" dev="sda1" ino=16461 res=1 [ 144.449450][ T9558] ------------[ cut here ]------------ [ 144.455666][ T9558] generic_make_request: Trying to write to read-only block-device loop0 (partno 0) [ 144.465359][ T9558] WARNING: CPU: 0 PID: 9558 at block/blk-core.c:800 generic_make_request_checks+0x1c78/0x2190 [ 144.475596][ T9558] Kernel panic - not syncing: panic_on_warn set ... [ 144.482173][ T9558] CPU: 0 PID: 9558 Comm: syz-executor865 Not tainted 5.4.0-syzkaller #0 [ 144.490473][ T9558] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 144.500506][ T9558] Call Trace: [ 144.503780][ T9558] dump_stack+0x197/0x210 [ 144.508088][ T9558] ? generic_make_request_checks+0x1c60/0x2190 [ 144.514227][ T9558] panic+0x2e3/0x75c [ 144.518142][ T9558] ? add_taint.cold+0x16/0x16 [ 144.522799][ T9558] ? __kasan_check_write+0x14/0x20 [ 144.527887][ T9558] ? __warn.cold+0x14/0x3e [ 144.532280][ T9558] ? __warn+0xd9/0x1cf [ 144.536326][ T9558] ? generic_make_request_checks+0x1c78/0x2190 [ 144.542455][ T9558] __warn.cold+0x2f/0x3e [ 144.546684][ T9558] ? generic_make_request_checks+0x1c78/0x2190 [ 144.552816][ T9558] report_bug+0x289/0x300 [ 144.557123][ T9558] do_error_trap+0x11b/0x200 [ 144.561692][ T9558] do_invalid_op+0x37/0x50 [ 144.566083][ T9558] ? generic_make_request_checks+0x1c78/0x2190 [ 144.572210][ T9558] invalid_op+0x23/0x30 [ 144.576352][ T9558] RIP: 0010:generic_make_request_checks+0x1c78/0x2190 [ 144.583126][ T9558] 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 [ 144.602812][ T9558] RSP: 0018:ffff888084c971c0 EFLAGS: 00010286 [ 144.608874][ T9558] RAX: 0000000000000000 RBX: ffff8880a3483000 RCX: 0000000000000000 [ 144.616824][ T9558] RDX: 0000000000000000 RSI: ffffffff815dc196 RDI: ffffed1010992e2a [ 144.624829][ T9558] RBP: ffff888084c972c0 R08: ffff8880a461e340 R09: fffffbfff1532e1e [ 144.632826][ T9558] R10: fffffbfff1532e1d R11: ffffffff8a9970ef R12: ffff88808e87cf08 [ 144.640779][ T9558] R13: 0000000000000000 R14: 0000000000000001 R15: ffff88808e87cf00 [ 144.648743][ T9558] ? vprintk_func+0x86/0x189 [ 144.653356][ T9558] ? trace_event_raw_event_block_rq_requeue+0x640/0x640 [ 144.660267][ T9558] ? __kasan_check_read+0x11/0x20 [ 144.665269][ T9558] ? __lock_acquire+0x8a0/0x4a00 [ 144.670183][ T9558] ? __kasan_check_read+0x11/0x20 [ 144.675184][ T9558] generic_make_request+0x8f/0xb50 [ 144.680274][ T9558] ? blk_queue_enter+0xe30/0xe30 [ 144.685191][ T9558] ? lock_downgrade+0x920/0x920 [ 144.690192][ T9558] submit_bio+0x113/0x600 [ 144.694498][ T9558] ? submit_bio+0x113/0x600 [ 144.698978][ T9558] ? generic_make_request+0xb50/0xb50 [ 144.704328][ T9558] ? bio_associate_blkg_from_css+0x4fd/0x980 [ 144.710293][ T9558] ? bio_reset+0x3a0/0x3a0 [ 144.714692][ T9558] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 144.720385][ T9558] ? guard_bio_eod+0x28f/0x6c0 [ 144.725123][ T9558] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 144.730831][ T9558] submit_bh_wbc+0x6b6/0x900 [ 144.735411][ T9558] __block_write_full_page+0x7fe/0x11b0 [ 144.740945][ T9558] ? bdev_evict_inode+0x5c0/0x5c0 [ 144.745947][ T9558] ? __getblk_gfp+0xa10/0xa10 [ 144.750601][ T9558] block_write_full_page+0x21f/0x270 [ 144.755877][ T9558] ? bdev_evict_inode+0x5c0/0x5c0 [ 144.760876][ T9558] blkdev_writepage+0x25/0x30 [ 144.765530][ T9558] __writepage+0x66/0x110 [ 144.769849][ T9558] write_cache_pages+0x80c/0x13f0 [ 144.774855][ T9558] ? tag_pages_for_writeback+0x4b0/0x4b0 [ 144.780465][ T9558] ? clear_page_dirty_for_io+0xde0/0xde0 [ 144.786259][ T9558] generic_writepages+0xed/0x160 [ 144.791178][ T9558] ? write_cache_pages+0x13f0/0x13f0 [ 144.796441][ T9558] ? wbc_attach_and_unlock_inode+0x515/0xa00 [ 144.802418][ T9558] ? find_held_lock+0x35/0x130 [ 144.807184][ T9558] ? blkdev_readpages+0x40/0x40 [ 144.812016][ T9558] blkdev_writepages+0x1e/0x30 [ 144.816809][ T9558] do_writepages+0xfa/0x2a0 [ 144.821317][ T9558] ? page_writeback_cpu_online+0x20/0x20 [ 144.826940][ T9558] ? do_raw_spin_unlock+0x178/0x270 [ 144.832121][ T9558] ? _raw_spin_unlock+0x28/0x40 [ 144.836954][ T9558] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 144.843173][ T9558] ? wbc_attach_and_unlock_inode+0x637/0xa00 [ 144.849138][ T9558] __filemap_fdatawrite_range+0x2bc/0x3b0 [ 144.854836][ T9558] ? delete_from_page_cache_batch+0xfe0/0xfe0 [ 144.860905][ T9558] ? lock_downgrade+0x920/0x920 [ 144.865734][ T9558] filemap_write_and_wait+0xf8/0x1e0 [ 144.870996][ T9558] __blkdev_put+0x204/0x810 [ 144.875480][ T9558] ? bd_set_size+0xb0/0xb0 [ 144.879875][ T9558] ? wait_for_completion+0x440/0x440 [ 144.885144][ T9558] blkdev_put+0x98/0x560 [ 144.889374][ T9558] blkdev_close+0x8b/0xb0 [ 144.893682][ T9558] __fput+0x2ff/0x890 [ 144.897653][ T9558] ? blkdev_put+0x560/0x560 [ 144.902136][ T9558] ____fput+0x16/0x20 [ 144.906096][ T9558] task_work_run+0x145/0x1c0 [ 144.910665][ T9558] do_exit+0x8e7/0x2e00 [ 144.914815][ T9558] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 144.921035][ T9558] ? mm_update_next_owner+0x7c0/0x7c0 [ 144.926473][ T9558] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 144.932441][ T9558] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 144.937874][ T9558] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 144.943311][ T9558] do_group_exit+0x135/0x360 [ 144.947889][ T9558] __x64_sys_exit_group+0x44/0x50 [ 144.952898][ T9558] do_syscall_64+0xfa/0x790 [ 144.957382][ T9558] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 144.963251][ T9558] RIP: 0033:0x442cc8 [ 144.967121][ T9558] Code: 00 00 ea dc 40 00 00 00 00 00 ea dc 40 00 00 00 00 00 ea dc 40 00 00 00 00 00 ea dc 40 00 00 00 00 00 ea dc 40 00 00 00 00 00 dc 40 00 00 00 00 00 b0 de 40 00 00 00 00 00 c8 de 40 00 00 00 [ 144.986750][ T9558] RSP: 002b:00007fff5be05b88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 144.995143][ T9558] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000442cc8 [ 145.003094][ T9558] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 145.011085][ T9558] RBP: 00000000004c2da8 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 145.019034][ T9558] R10: 6c616b7a79732f2e R11: 0000000000000246 R12: 0000000000000001 [ 145.026981][ T9558] R13: 00000000006d51a0 R14: 0000000000000000 R15: 0000000000000000 [ 145.036494][ T9558] Kernel Offset: disabled [ 145.040883][ T9558] Rebooting in 86400 seconds..