Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.52' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 75.880343][ T8502] loop0: detected capacity change from 0 to 2394 [ 75.966894][ T8506] ------------[ cut here ]------------ [ 75.972673][ T8506] Trying to write to read-only block-device loop0 (partno 0) [ 75.982667][ T8506] WARNING: CPU: 1 PID: 8506 at block/blk-core.c:703 submit_bio_checks+0x1641/0x1a70 [ 75.993739][ T8506] Modules linked in: [ 75.998928][ T8506] CPU: 1 PID: 8506 Comm: syz-executor728 Not tainted 5.13.0-syzkaller #0 [ 76.008645][ T8506] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.020024][ T8506] RIP: 0010:submit_bio_checks+0x1641/0x1a70 [ 76.028957][ T8506] Code: 00 00 45 0f b6 a4 24 50 05 00 00 48 8d 74 24 60 48 89 ef e8 c1 46 fe ff 48 c7 c7 00 55 e1 89 48 89 c6 44 89 e2 e8 1c 48 23 05 <0f> 0b e9 51 f3 ff ff e8 83 30 b9 fd 0f 0b e9 da f1 ff ff e8 77 30 [ 76.051260][ T8506] RSP: 0018:ffffc9000167f238 EFLAGS: 00010286 [ 76.058603][ T8506] RAX: 0000000000000000 RBX: ffff88801ef18000 RCX: 0000000000000000 [ 76.067645][ T8506] RDX: ffff8880215f0000 RSI: ffffffff815d7275 RDI: fffff520002cfe39 [ 76.077159][ T8506] RBP: ffff88801ee13a00 R08: 0000000000000000 R09: 0000000000000000 [ 76.086576][ T8506] R10: ffffffff815d10de R11: 0000000000000000 R12: 0000000000000000 [ 76.096301][ T8506] R13: ffff88801ee13a10 R14: ffff88801acd3700 R15: ffff88801ef18574 [ 76.105786][ T8506] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 76.116291][ T8506] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.122940][ T8506] CR2: 00007fdfe4ef8000 CR3: 00000000273ec000 CR4: 00000000001506e0 [ 76.131579][ T8506] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.139784][ T8506] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.148231][ T8506] Call Trace: [ 76.151548][ T8506] ? __lock_acquire+0xbc2/0x54a0 [ 76.156598][ T8506] ? trace_event_raw_event_block_rq_requeue+0x510/0x510 [ 76.163595][ T8506] submit_bio_noacct+0x81/0xf20 [ 76.168615][ T8506] ? blk_queue_enter+0xb50/0xb50 [ 76.173610][ T8506] ? lock_downgrade+0x6e0/0x6e0 [ 76.178842][ T8506] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 76.185489][ T8506] ? __bio_add_page+0x377/0x540 [ 76.190376][ T8506] submit_bio+0x1ea/0x470 [ 76.194845][ T8506] ? submit_bio_noacct+0xf20/0xf20 [ 76.200033][ T8506] submit_bh_wbc+0x5eb/0x7f0 [ 76.204805][ T8506] __block_write_full_page+0x879/0x1360 [ 76.210410][ T8506] ? bdev_evict_inode+0x490/0x490 [ 76.215747][ T8506] block_write_full_page+0x14d/0x190 [ 76.221143][ T8506] ? bdev_evict_inode+0x490/0x490 [ 76.226360][ T8506] __writepage+0x60/0x180 [ 76.230836][ T8506] write_cache_pages+0x754/0x1190 [ 76.236109][ T8506] ? tag_pages_for_writeback+0x450/0x450 [ 76.241931][ T8506] ? clear_page_dirty_for_io+0xa30/0xa30 [ 76.247713][ T8506] ? mark_lock+0xef/0x17b0 [ 76.252239][ T8506] ? __lock_acquire+0x162f/0x54a0 [ 76.257378][ T8506] ? blkdev_readahead+0x20/0x20 [ 76.262485][ T8506] generic_writepages+0xe2/0x150 [ 76.267996][ T8506] ? write_cache_pages+0x1190/0x1190 [ 76.273329][ T8506] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 76.279408][ T8506] ? find_held_lock+0x2d/0x110 [ 76.284517][ T8506] do_writepages+0xec/0x290 [ 76.289081][ T8506] ? writeback_set_ratelimit+0x150/0x150 [ 76.295165][ T8506] ? do_raw_spin_lock+0x120/0x2b0 [ 76.300457][ T8506] ? do_raw_spin_unlock+0x171/0x230 [ 76.305793][ T8506] ? _raw_spin_unlock+0x24/0x40 [ 76.310701][ T8506] ? wbc_attach_and_unlock_inode+0x111/0x9d0 [ 76.316896][ T8506] __filemap_fdatawrite_range+0x2a5/0x390 [ 76.322680][ T8506] ? delete_from_page_cache_batch+0xe20/0xe20 [ 76.328955][ T8506] ? locks_remove_file+0x30d/0x560 [ 76.334139][ T8506] ? do_raw_spin_unlock+0x171/0x230 [ 76.339557][ T8506] filemap_write_and_wait_range+0x65/0x100 [ 76.345704][ T8506] blkdev_put+0x7ff/0xae0 [ 76.350153][ T8506] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 76.356763][ T8506] blkdev_close+0x8c/0xb0 [ 76.361280][ T8506] __fput+0x288/0x920 [ 76.365648][ T8506] ? blkdev_put+0xae0/0xae0 [ 76.370168][ T8506] task_work_run+0xdd/0x1a0 [ 76.375002][ T8506] do_exit+0xbd4/0x2a50 [ 76.379221][ T8506] ? mm_update_next_owner+0x7a0/0x7a0 [ 76.384860][ T8506] ? lock_downgrade+0x6e0/0x6e0 [ 76.389815][ T8506] do_group_exit+0x125/0x310 [ 76.394499][ T8506] get_signal+0x47f/0x2150 [ 76.399251][ T8506] arch_do_signal_or_restart+0x2a9/0x1eb0 [ 76.405370][ T8506] ? find_held_lock+0x2d/0x110 [ 76.410780][ T8506] ? copy_siginfo_to_user32+0xa0/0xa0 [ 76.416283][ T8506] ? __do_sys_futex+0xdc/0x3b0 [ 76.421208][ T8506] ? do_futex+0x1770/0x1770 [ 76.425860][ T8506] exit_to_user_mode_prepare+0x17d/0x290 [ 76.431629][ T8506] syscall_exit_to_user_mode+0x19/0x60 [ 76.437245][ T8506] do_syscall_64+0x42/0xb0 [ 76.441701][ T8506] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 76.447736][ T8506] RIP: 0033:0x44a639 [ 76.451654][ T8506] Code: Unable to access opcode bytes at RIP 0x44a60f. [ 76.458563][ T8506] RSP: 002b:00007fd716c822f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 76.467101][ T8506] RAX: fffffffffffffe00 RBX: 00000000004cb4f0 RCX: 000000000044a639 [ 76.475505][ T8506] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000004cb4f8 [ 76.483488][ T8506] RBP: 00000000004cb4fc R08: 0000000000000000 R09: 0000000000000000 [ 76.492037][ T8506] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000049b004 [ 76.500099][ T8506] R13: 6f6f6c2f7665642f R14: 65732f636f72702f R15: 00000000004cb4f8 [ 76.508201][ T8506] Kernel panic - not syncing: panic_on_warn set ... [ 76.514990][ T8506] CPU: 0 PID: 8506 Comm: syz-executor728 Not tainted 5.13.0-syzkaller #0 [ 76.523410][ T8506] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.533454][ T8506] Call Trace: [ 76.536741][ T8506] dump_stack_lvl+0xcd/0x134 [ 76.541324][ T8506] panic+0x306/0x73d [ 76.545464][ T8506] ? __warn_printk+0xf3/0xf3 [ 76.550043][ T8506] ? __warn.cold+0x1a/0x44 [ 76.554531][ T8506] ? submit_bio_checks+0x1641/0x1a70 [ 76.559802][ T8506] __warn.cold+0x35/0x44 [ 76.564288][ T8506] ? wake_up_klogd.part.0+0x8e/0xd0 [ 76.569483][ T8506] ? submit_bio_checks+0x1641/0x1a70 [ 76.575104][ T8506] report_bug+0x1bd/0x210 [ 76.579431][ T8506] handle_bug+0x3c/0x60 [ 76.583661][ T8506] exc_invalid_op+0x14/0x40 [ 76.588156][ T8506] asm_exc_invalid_op+0x12/0x20 [ 76.592991][ T8506] RIP: 0010:submit_bio_checks+0x1641/0x1a70 [ 76.598880][ T8506] Code: 00 00 45 0f b6 a4 24 50 05 00 00 48 8d 74 24 60 48 89 ef e8 c1 46 fe ff 48 c7 c7 00 55 e1 89 48 89 c6 44 89 e2 e8 1c 48 23 05 <0f> 0b e9 51 f3 ff ff e8 83 30 b9 fd 0f 0b e9 da f1 ff ff e8 77 30 [ 76.618471][ T8506] RSP: 0018:ffffc9000167f238 EFLAGS: 00010286 [ 76.624610][ T8506] RAX: 0000000000000000 RBX: ffff88801ef18000 RCX: 0000000000000000 [ 76.632561][ T8506] RDX: ffff8880215f0000 RSI: ffffffff815d7275 RDI: fffff520002cfe39 [ 76.640512][ T8506] RBP: ffff88801ee13a00 R08: 0000000000000000 R09: 0000000000000000 [ 76.648769][ T8506] R10: ffffffff815d10de R11: 0000000000000000 R12: 0000000000000000 [ 76.657000][ T8506] R13: ffff88801ee13a10 R14: ffff88801acd3700 R15: ffff88801ef18574 [ 76.665217][ T8506] ? wake_up_klogd.part.0+0x8e/0xd0 [ 76.670489][ T8506] ? vprintk+0x95/0x260 [ 76.674643][ T8506] ? submit_bio_checks+0x1641/0x1a70 [ 76.679919][ T8506] ? __lock_acquire+0xbc2/0x54a0 [ 76.684841][ T8506] ? trace_event_raw_event_block_rq_requeue+0x510/0x510 [ 76.691778][ T8506] submit_bio_noacct+0x81/0xf20 [ 76.696633][ T8506] ? blk_queue_enter+0xb50/0xb50 [ 76.701585][ T8506] ? lock_downgrade+0x6e0/0x6e0 [ 76.706517][ T8506] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 76.712739][ T8506] ? __bio_add_page+0x377/0x540 [ 76.717593][ T8506] submit_bio+0x1ea/0x470 [ 76.721906][ T8506] ? submit_bio_noacct+0xf20/0xf20 [ 76.727358][ T8506] submit_bh_wbc+0x5eb/0x7f0 [ 76.732033][ T8506] __block_write_full_page+0x879/0x1360 [ 76.737567][ T8506] ? bdev_evict_inode+0x490/0x490 [ 76.742580][ T8506] block_write_full_page+0x14d/0x190 [ 76.747872][ T8506] ? bdev_evict_inode+0x490/0x490 [ 76.752927][ T8506] __writepage+0x60/0x180 [ 76.757266][ T8506] write_cache_pages+0x754/0x1190 [ 76.762461][ T8506] ? tag_pages_for_writeback+0x450/0x450 [ 76.768172][ T8506] ? clear_page_dirty_for_io+0xa30/0xa30 [ 76.773813][ T8506] ? mark_lock+0xef/0x17b0 [ 76.778294][ T8506] ? __lock_acquire+0x162f/0x54a0 [ 76.783549][ T8506] ? blkdev_readahead+0x20/0x20 [ 76.788406][ T8506] generic_writepages+0xe2/0x150 [ 76.793464][ T8506] ? write_cache_pages+0x1190/0x1190 [ 76.798886][ T8506] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 76.804905][ T8506] ? find_held_lock+0x2d/0x110 [ 76.810274][ T8506] do_writepages+0xec/0x290 [ 76.814809][ T8506] ? writeback_set_ratelimit+0x150/0x150 [ 76.820431][ T8506] ? do_raw_spin_lock+0x120/0x2b0 [ 76.825445][ T8506] ? do_raw_spin_unlock+0x171/0x230 [ 76.830650][ T8506] ? _raw_spin_unlock+0x24/0x40 [ 76.835535][ T8506] ? wbc_attach_and_unlock_inode+0x111/0x9d0 [ 76.841689][ T8506] __filemap_fdatawrite_range+0x2a5/0x390 [ 76.847642][ T8506] ? delete_from_page_cache_batch+0xe20/0xe20 [ 76.853814][ T8506] ? locks_remove_file+0x30d/0x560 [ 76.859025][ T8506] ? do_raw_spin_unlock+0x171/0x230 [ 76.864320][ T8506] filemap_write_and_wait_range+0x65/0x100 [ 76.870145][ T8506] blkdev_put+0x7ff/0xae0 [ 76.874570][ T8506] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 76.880912][ T8506] blkdev_close+0x8c/0xb0 [ 76.885271][ T8506] __fput+0x288/0x920 [ 76.889337][ T8506] ? blkdev_put+0xae0/0xae0 [ 76.893841][ T8506] task_work_run+0xdd/0x1a0 [ 76.898437][ T8506] do_exit+0xbd4/0x2a50 [ 76.902586][ T8506] ? mm_update_next_owner+0x7a0/0x7a0 [ 76.907940][ T8506] ? lock_downgrade+0x6e0/0x6e0 [ 76.912792][ T8506] do_group_exit+0x125/0x310 [ 76.917389][ T8506] get_signal+0x47f/0x2150 [ 76.921887][ T8506] arch_do_signal_or_restart+0x2a9/0x1eb0 [ 76.927620][ T8506] ? find_held_lock+0x2d/0x110 [ 76.932657][ T8506] ? copy_siginfo_to_user32+0xa0/0xa0 [ 76.938015][ T8506] ? __do_sys_futex+0xdc/0x3b0 [ 76.942868][ T8506] ? do_futex+0x1770/0x1770 [ 76.947379][ T8506] exit_to_user_mode_prepare+0x17d/0x290 [ 76.953009][ T8506] syscall_exit_to_user_mode+0x19/0x60 [ 76.958468][ T8506] do_syscall_64+0x42/0xb0 [ 76.962869][ T8506] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 76.968752][ T8506] RIP: 0033:0x44a639 [ 76.972630][ T8506] Code: Unable to access opcode bytes at RIP 0x44a60f. [ 76.979538][ T8506] RSP: 002b:00007fd716c822f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 76.987975][ T8506] RAX: fffffffffffffe00 RBX: 00000000004cb4f0 RCX: 000000000044a639 [ 76.996229][ T8506] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000004cb4f8 [ 77.004219][ T8506] RBP: 00000000004cb4fc R08: 0000000000000000 R09: 0000000000000000 [ 77.012189][ T8506] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000049b004 [ 77.020158][ T8506] R13: 6f6f6c2f7665642f R14: 65732f636f72702f R15: 00000000004cb4f8 [ 77.029846][ T8506] Kernel Offset: disabled [ 77.034278][ T8506] Rebooting in 86400 seconds..