[ 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 '10.128.0.197' (ECDSA) to the list of known hosts. syzkaller login: [ 91.433473][ T37] audit: type=1400 audit(1620597117.541:8): avc: denied { execmem } for pid=8427 comm="syz-executor820" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 executing program write to /proc/sys/net/core/bpf_jit_kallsyms failed: No such file or directory write to /proc/sys/net/core/bpf_jit_harden failed: No such file or directory [ 91.522654][ T8451] loop0: detected capacity change from 0 to 519 [ 91.622578][ T8456] ------------[ cut here ]------------ [ 91.629008][ T8456] Trying to write to read-only block-device loop0 (partno 0) [ 91.638656][ T8456] WARNING: CPU: 0 PID: 8456 at block/blk-core.c:704 submit_bio_checks+0x165c/0x1aa0 [ 91.648561][ T8456] Modules linked in: [ 91.652888][ T8456] CPU: 1 PID: 8456 Comm: syz-executor820 Not tainted 5.12.0-syzkaller #0 [ 91.670879][ T8456] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 91.681439][ T8456] RIP: 0010:submit_bio_checks+0x165c/0x1aa0 [ 91.687382][ T8456] Code: 00 00 45 0f b6 a4 24 e0 05 00 00 48 8d 74 24 60 48 89 ef e8 56 35 fe ff 48 c7 c7 a0 50 c0 89 48 89 c6 44 89 e2 e8 a1 ed 1b 05 <0f> 0b e9 36 f3 ff ff e8 f8 2a bb fd 0f 0b e9 bf f1 ff ff e8 ec 2a [ 91.707781][ T8456] RSP: 0018:ffffc900016370c8 EFLAGS: 00010282 [ 91.714551][ T8456] RAX: 0000000000000000 RBX: ffff88801eead120 RCX: 0000000000000000 [ 91.723369][ T8456] RDX: ffff88802f1f0340 RSI: ffffffff815bfe35 RDI: fffff520002c6e0b [ 91.732534][ T8456] RBP: ffff88801e893e80 R08: 0000000000000000 R09: 0000000000000000 [ 91.741671][ T8456] R10: ffffffff815b9c6e R11: 0000000000000000 R12: 0000000000000000 [ 91.749793][ T8456] R13: ffff88801e893e90 R14: ffff88801b5a8040 R15: ffff88801eead624 [ 91.759115][ T8456] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 91.769091][ T8456] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 91.776444][ T8456] CR2: 00007f4b3060e000 CR3: 000000002aaa5000 CR4: 00000000001506e0 [ 91.785357][ T8456] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 91.798698][ T8456] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 91.807169][ T8456] Call Trace: [ 91.810767][ T8456] ? trace_event_raw_event_block_rq_requeue+0x510/0x510 [ 91.818089][ T8456] ? __lock_acquire+0xb3a/0x5230 [ 91.823750][ T8456] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 91.829790][ T8456] submit_bio_noacct+0x81/0xf20 [ 91.836255][ T8456] ? blk_queue_enter+0xb50/0xb50 [ 91.842346][ T8456] ? bio_associate_blkg_from_css+0x563/0xf60 [ 91.850065][ T8456] ? lock_downgrade+0x6e0/0x6e0 [ 91.855163][ T8456] submit_bio+0x263/0x5e0 [ 91.859549][ T8456] ? submit_bio_noacct+0xf20/0xf20 [ 91.866024][ T8456] ? bio_add_page+0x23d/0x2f0 [ 91.871136][ T8456] ? __bio_add_page+0x610/0x610 [ 91.876206][ T8456] submit_bh_wbc+0x5eb/0x7f0 [ 91.882764][ T8456] __block_write_full_page+0x86c/0x1340 [ 91.888940][ T8456] ? bdev_evict_inode+0x460/0x460 [ 91.894653][ T8456] block_write_full_page+0x14d/0x190 [ 91.900585][ T8456] ? bdev_evict_inode+0x460/0x460 [ 91.905773][ T8456] __writepage+0x60/0x180 [ 91.910574][ T8456] write_cache_pages+0x759/0x11a0 [ 91.915713][ T8456] ? tag_pages_for_writeback+0x450/0x450 [ 91.922890][ T8456] ? clear_page_dirty_for_io+0xa10/0xa10 [ 91.928669][ T8456] ? mark_lock+0xef/0x17b0 [ 91.934339][ T8456] ? asm_sysvec_call_function_single+0x12/0x20 [ 91.940815][ T8456] ? lock_chain_count+0x20/0x20 [ 91.945954][ T8456] ? lockdep_hardirqs_on+0x79/0x100 [ 91.951522][ T8456] ? __lock_acquire+0x16a7/0x5230 [ 91.956946][ T8456] ? blkdev_readahead+0x20/0x20 [ 91.963189][ T8456] generic_writepages+0xe2/0x150 [ 91.968460][ T8456] ? write_cache_pages+0x11a0/0x11a0 [ 91.975407][ T8456] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 91.981780][ T8456] ? find_held_lock+0x2d/0x110 [ 91.986646][ T8456] do_writepages+0xec/0x290 [ 91.991582][ T8456] ? writeback_set_ratelimit+0x150/0x150 [ 91.997412][ T8456] ? do_raw_spin_lock+0x120/0x2b0 [ 92.002747][ T8456] ? do_raw_spin_unlock+0x171/0x230 [ 92.008083][ T8456] ? _raw_spin_unlock+0x24/0x40 [ 92.013069][ T8456] ? wbc_attach_and_unlock_inode+0x117/0x9e0 [ 92.019273][ T8456] __filemap_fdatawrite_range+0x2a5/0x390 [ 92.025100][ T8456] ? delete_from_page_cache_batch+0xe20/0xe20 [ 92.031323][ T8456] ? blkdev_put+0x86/0x580 [ 92.035783][ T8456] ? lock_downgrade+0x6e0/0x6e0 [ 92.041021][ T8456] filemap_write_and_wait_range+0x65/0x100 [ 92.047224][ T8456] __blkdev_put+0x64b/0x790 [ 92.052073][ T8456] ? __mutex_unlock_slowpath+0xe2/0x610 [ 92.057733][ T8456] ? freeze_bdev+0x250/0x250 [ 92.062708][ T8456] ? do_raw_spin_lock+0x120/0x2b0 [ 92.067870][ T8456] ? wait_for_completion_io+0x270/0x270 [ 92.073831][ T8456] ? rwlock_bug.part.0+0x90/0x90 [ 92.078819][ T8456] ? _raw_spin_unlock+0x24/0x40 [ 92.084185][ T8456] blkdev_put+0x92/0x580 [ 92.088915][ T8456] blkdev_close+0x8c/0xb0 [ 92.094663][ T8456] __fput+0x288/0x920 [ 92.098808][ T8456] ? blkdev_put+0x580/0x580 [ 92.103635][ T8456] task_work_run+0xdd/0x1a0 [ 92.108444][ T8456] do_exit+0xbfc/0x2a60 [ 92.112763][ T8456] ? find_held_lock+0x2d/0x110 [ 92.117539][ T8456] ? mm_update_next_owner+0x7a0/0x7a0 [ 92.123102][ T8456] ? get_signal+0x337/0x2150 [ 92.127718][ T8456] ? lock_downgrade+0x6e0/0x6e0 [ 92.132755][ T8456] do_group_exit+0x125/0x310 [ 92.137359][ T8456] get_signal+0x47f/0x2150 [ 92.142021][ T8456] arch_do_signal_or_restart+0x2a8/0x1eb0 [ 92.147847][ T8456] ? find_held_lock+0x2d/0x110 [ 92.152893][ T8456] ? copy_siginfo_to_user32+0xa0/0xa0 [ 92.158302][ T8456] ? __do_sys_futex+0x2ab/0x470 [ 92.163534][ T8456] ? do_futex+0x1780/0x1780 [ 92.168274][ T8456] exit_to_user_mode_prepare+0x171/0x280 [ 92.174027][ T8456] syscall_exit_to_user_mode+0x19/0x60 [ 92.179517][ T8456] do_syscall_64+0x47/0xb0 [ 92.184126][ T8456] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 92.190288][ T8456] RIP: 0033:0x452519 [ 92.194655][ T8456] Code: Unable to access opcode bytes at RIP 0x4524ef. [ 92.202071][ T8456] RSP: 002b:00007ff51b73d2f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 92.210653][ T8456] RAX: 0000000000000001 RBX: 00000000004cd4d0 RCX: 0000000000452519 [ 92.218829][ T8456] RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00000000004cd4dc [ 92.228261][ T8456] RBP: 00000000004cd4dc R08: 0000000000000000 R09: 0000000000000000 [ 92.236749][ T8456] R10: 0000000000000005 R11: 0000000000000246 R12: 000000000049c498 [ 92.245036][ T8456] R13: 6f6f6c2f7665642f R14: f821000000006cf9 R15: 00000000004cd4d8 [ 92.253595][ T8456] Kernel panic - not syncing: panic_on_warn set ... [ 92.260376][ T8456] CPU: 0 PID: 8456 Comm: syz-executor820 Not tainted 5.12.0-syzkaller #0 [ 92.268803][ T8456] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 92.279047][ T8456] Call Trace: [ 92.282767][ T8456] dump_stack+0x141/0x1d7 [ 92.287329][ T8456] panic+0x306/0x73d [ 92.291235][ T8456] ? __warn_printk+0xf3/0xf3 [ 92.295925][ T8456] ? __warn.cold+0x1a/0x44 [ 92.300548][ T8456] ? submit_bio_checks+0x165c/0x1aa0 [ 92.305932][ T8456] __warn.cold+0x35/0x44 [ 92.310704][ T8456] ? wake_up_klogd.part.0+0x8e/0xd0 [ 92.316004][ T8456] ? submit_bio_checks+0x165c/0x1aa0 [ 92.321315][ T8456] report_bug+0x1bd/0x210 [ 92.326420][ T8456] handle_bug+0x3c/0x60 [ 92.330707][ T8456] exc_invalid_op+0x14/0x40 [ 92.335392][ T8456] asm_exc_invalid_op+0x12/0x20 [ 92.340356][ T8456] RIP: 0010:submit_bio_checks+0x165c/0x1aa0 [ 92.346449][ T8456] Code: 00 00 45 0f b6 a4 24 e0 05 00 00 48 8d 74 24 60 48 89 ef e8 56 35 fe ff 48 c7 c7 a0 50 c0 89 48 89 c6 44 89 e2 e8 a1 ed 1b 05 <0f> 0b e9 36 f3 ff ff e8 f8 2a bb fd 0f 0b e9 bf f1 ff ff e8 ec 2a [ 92.367000][ T8456] RSP: 0018:ffffc900016370c8 EFLAGS: 00010282 [ 92.374087][ T8456] RAX: 0000000000000000 RBX: ffff88801eead120 RCX: 0000000000000000 [ 92.382243][ T8456] RDX: ffff88802f1f0340 RSI: ffffffff815bfe35 RDI: fffff520002c6e0b [ 92.390657][ T8456] RBP: ffff88801e893e80 R08: 0000000000000000 R09: 0000000000000000 [ 92.398634][ T8456] R10: ffffffff815b9c6e R11: 0000000000000000 R12: 0000000000000000 [ 92.406874][ T8456] R13: ffff88801e893e90 R14: ffff88801b5a8040 R15: ffff88801eead624 [ 92.415018][ T8456] ? wake_up_klogd.part.0+0x8e/0xd0 [ 92.420245][ T8456] ? vprintk+0x95/0x260 [ 92.424561][ T8456] ? submit_bio_checks+0x165c/0x1aa0 [ 92.429864][ T8456] ? trace_event_raw_event_block_rq_requeue+0x510/0x510 [ 92.436810][ T8456] ? __lock_acquire+0xb3a/0x5230 [ 92.441848][ T8456] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 92.448375][ T8456] submit_bio_noacct+0x81/0xf20 [ 92.453244][ T8456] ? blk_queue_enter+0xb50/0xb50 [ 92.458249][ T8456] ? bio_associate_blkg_from_css+0x563/0xf60 [ 92.464421][ T8456] ? lock_downgrade+0x6e0/0x6e0 [ 92.469485][ T8456] submit_bio+0x263/0x5e0 [ 92.473923][ T8456] ? submit_bio_noacct+0xf20/0xf20 [ 92.479045][ T8456] ? bio_add_page+0x23d/0x2f0 [ 92.483820][ T8456] ? __bio_add_page+0x610/0x610 [ 92.488906][ T8456] submit_bh_wbc+0x5eb/0x7f0 [ 92.493553][ T8456] __block_write_full_page+0x86c/0x1340 [ 92.499482][ T8456] ? bdev_evict_inode+0x460/0x460 [ 92.504627][ T8456] block_write_full_page+0x14d/0x190 [ 92.510124][ T8456] ? bdev_evict_inode+0x460/0x460 [ 92.515501][ T8456] __writepage+0x60/0x180 [ 92.519837][ T8456] write_cache_pages+0x759/0x11a0 [ 92.524896][ T8456] ? tag_pages_for_writeback+0x450/0x450 [ 92.530888][ T8456] ? clear_page_dirty_for_io+0xa10/0xa10 [ 92.536627][ T8456] ? mark_lock+0xef/0x17b0 [ 92.541096][ T8456] ? asm_sysvec_call_function_single+0x12/0x20 [ 92.547264][ T8456] ? lock_chain_count+0x20/0x20 [ 92.552325][ T8456] ? lockdep_hardirqs_on+0x79/0x100 [ 92.557713][ T8456] ? __lock_acquire+0x16a7/0x5230 [ 92.562748][ T8456] ? blkdev_readahead+0x20/0x20 [ 92.567612][ T8456] generic_writepages+0xe2/0x150 [ 92.572577][ T8456] ? write_cache_pages+0x11a0/0x11a0 [ 92.577870][ T8456] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 92.584034][ T8456] ? find_held_lock+0x2d/0x110 [ 92.588804][ T8456] do_writepages+0xec/0x290 [ 92.593432][ T8456] ? writeback_set_ratelimit+0x150/0x150 [ 92.599074][ T8456] ? do_raw_spin_lock+0x120/0x2b0 [ 92.604125][ T8456] ? do_raw_spin_unlock+0x171/0x230 [ 92.609339][ T8456] ? _raw_spin_unlock+0x24/0x40 [ 92.614348][ T8456] ? wbc_attach_and_unlock_inode+0x117/0x9e0 [ 92.620696][ T8456] __filemap_fdatawrite_range+0x2a5/0x390 [ 92.627084][ T8456] ? delete_from_page_cache_batch+0xe20/0xe20 [ 92.634242][ T8456] ? blkdev_put+0x86/0x580 [ 92.638774][ T8456] ? lock_downgrade+0x6e0/0x6e0 [ 92.643914][ T8456] filemap_write_and_wait_range+0x65/0x100 [ 92.651573][ T8456] __blkdev_put+0x64b/0x790 [ 92.657223][ T8456] ? __mutex_unlock_slowpath+0xe2/0x610 [ 92.662884][ T8456] ? freeze_bdev+0x250/0x250 [ 92.667626][ T8456] ? do_raw_spin_lock+0x120/0x2b0 [ 92.672680][ T8456] ? wait_for_completion_io+0x270/0x270 [ 92.678249][ T8456] ? rwlock_bug.part.0+0x90/0x90 [ 92.683200][ T8456] ? _raw_spin_unlock+0x24/0x40 [ 92.688308][ T8456] blkdev_put+0x92/0x580 [ 92.692867][ T8456] blkdev_close+0x8c/0xb0 [ 92.697760][ T8456] __fput+0x288/0x920 [ 92.702280][ T8456] ? blkdev_put+0x580/0x580 [ 92.707227][ T8456] task_work_run+0xdd/0x1a0 [ 92.712108][ T8456] do_exit+0xbfc/0x2a60 [ 92.716463][ T8456] ? find_held_lock+0x2d/0x110 [ 92.721594][ T8456] ? mm_update_next_owner+0x7a0/0x7a0 [ 92.727718][ T8456] ? get_signal+0x337/0x2150 [ 92.732520][ T8456] ? lock_downgrade+0x6e0/0x6e0 [ 92.737576][ T8456] do_group_exit+0x125/0x310 [ 92.742396][ T8456] get_signal+0x47f/0x2150 [ 92.746972][ T8456] arch_do_signal_or_restart+0x2a8/0x1eb0 [ 92.752709][ T8456] ? find_held_lock+0x2d/0x110 [ 92.757516][ T8456] ? copy_siginfo_to_user32+0xa0/0xa0 [ 92.762898][ T8456] ? __do_sys_futex+0x2ab/0x470 [ 92.767761][ T8456] ? do_futex+0x1780/0x1780 [ 92.772303][ T8456] exit_to_user_mode_prepare+0x171/0x280 [ 92.778894][ T8456] syscall_exit_to_user_mode+0x19/0x60 [ 92.785683][ T8456] do_syscall_64+0x47/0xb0 [ 92.790265][ T8456] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 92.796650][ T8456] RIP: 0033:0x452519 [ 92.800552][ T8456] Code: Unable to access opcode bytes at RIP 0x4524ef. [ 92.807571][ T8456] RSP: 002b:00007ff51b73d2f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 92.816238][ T8456] RAX: 0000000000000001 RBX: 00000000004cd4d0 RCX: 0000000000452519 [ 92.824309][ T8456] RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00000000004cd4dc [ 92.832535][ T8456] RBP: 00000000004cd4dc R08: 0000000000000000 R09: 0000000000000000 [ 92.840604][ T8456] R10: 0000000000000005 R11: 0000000000000246 R12: 000000000049c498 [ 92.848772][ T8456] R13: 6f6f6c2f7665642f R14: f821000000006cf9 R15: 00000000004cd4d8 [ 92.858432][ T8456] Kernel Offset: disabled [ 92.863437][ T8456] Rebooting in 86400 seconds..