[ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Started Getty on tty2. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ 57.349923][ T6751] BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6751 [ 57.359531][ T6751] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 57.366136][ T6751] CPU: 0 PID: 6751 Comm: systemd-rfkill Not tainted 5.7.0-syzkaller #0 [ 57.374612][ T6751] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.384678][ T6751] Call Trace: [ 57.387959][ T6751] dump_stack+0x18f/0x20d [ 57.392293][ T6751] check_preemption_disabled+0x20d/0x220 [ 57.397923][ T6751] ext4_mb_new_blocks+0xa4d/0x3b70 [ 57.403027][ T6751] ? ext4_ext_search_right+0x2ca/0xb20 [ 57.408464][ T6751] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 57.414351][ T6751] ext4_ext_map_blocks+0x201b/0x33e0 [ 57.419619][ T6751] ? ext4_ext_release+0x10/0x10 [ 57.424464][ T6751] ? down_write_killable+0x170/0x170 [ 57.429722][ T6751] ? ext4_es_lookup_extent+0x41d/0xd10 [ 57.435374][ T6751] ext4_map_blocks+0x4cb/0x1640 [ 57.440233][ T6751] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 57.445437][ T6751] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 57.451033][ T6751] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 57.457008][ T6751] ? prandom_u32_state+0xe/0x170 [ 57.461944][ T6751] ? __brelse+0x84/0xa0 [ 57.466094][ T6751] ? __ext4_new_inode+0x144/0x55e0 [ 57.471201][ T6751] ext4_getblk+0xad/0x520 [ 57.475513][ T6751] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 57.482009][ T6751] ? ext4_free_inode+0x1700/0x1700 [ 57.487135][ T6751] ext4_bread+0x7c/0x380 [ 57.491466][ T6751] ? ext4_getblk+0x520/0x520 [ 57.496053][ T6751] ? dquot_get_next_dqblk+0x180/0x180 [ 57.501407][ T6751] ext4_append+0x153/0x360 [ 57.505843][ T6751] ext4_mkdir+0x5e0/0xdf0 [ 57.510205][ T6751] ? ext4_rmdir+0xde0/0xde0 [ 57.514813][ T6751] ? security_inode_permission+0xc4/0xf0 [ 57.520446][ T6751] vfs_mkdir+0x419/0x690 [ 57.524755][ T6751] do_mkdirat+0x21e/0x280 [ 57.529085][ T6751] ? __ia32_sys_mknod+0xb0/0xb0 [ 57.533947][ T6751] ? do_syscall_64+0x1c/0xe0 [ 57.538537][ T6751] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 57.545124][ T6751] do_syscall_64+0x60/0xe0 [ 57.549538][ T6751] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 57.555415][ T6751] RIP: 0033:0x7fb74fae4687 [ 57.559805][ T6751] Code: Bad RIP value. [ 57.563847][ T6751] RSP: 002b:00007ffc3f4e6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 57.572247][ T6751] RAX: ffffffffffffffda RBX: 0000556ce1ff8985 RCX: 00007fb74fae4687 [ 57.580193][ T6751] RDX: 00007ffc3f4e5ef0 RSI: 00000000000001ed RDI: 0000556ce1ff8985 [ 57.588164][ T6751] RBP: 00007fb74fae4680 R08: 0000000000000100 R09: 0000000000000000 [ 57.596117][ T6751] R10: 0000556ce1ff8980 R11: 0000000000000246 R12: 00000000000001ed [ 57.604072][ T6751] R13: 00007ffc3f4e61b0 R14: 0000000000000000 R15: 0000000000000000 [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 60.320770][ T6788] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:7/6788 [ 60.330436][ T6788] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.336559][ T6788] CPU: 1 PID: 6788 Comm: kworker/u4:7 Not tainted 5.7.0-syzkaller #0 [ 60.344738][ T6788] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.354941][ T6788] Workqueue: writeback wb_workfn (flush-8:0) [ 60.360908][ T6788] Call Trace: [ 60.364201][ T6788] dump_stack+0x18f/0x20d [ 60.368559][ T6788] check_preemption_disabled+0x20d/0x220 [ 60.374184][ T6788] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.379287][ T6788] ? ext4_find_extent+0x81a/0xad0 [ 60.384306][ T6788] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.390006][ T6788] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.395721][ T6788] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.400995][ T6788] ? ext4_ext_release+0x10/0x10 [ 60.405855][ T6788] ? down_write_killable+0x170/0x170 [ 60.411129][ T6788] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.416591][ T6788] ext4_map_blocks+0x4cb/0x1640 [ 60.421448][ T6788] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.426785][ T6788] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.432387][ T6788] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.438420][ T6788] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 60.443868][ T6788] ext4_writepages+0x1a7b/0x33c0 [ 60.449058][ T6788] ? __ext4_mark_inode_dirty+0x940/0x940 [ 60.454682][ T6788] ? __lock_acquire+0x2224/0x48b0 [ 60.459695][ T6788] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 60.465666][ T6788] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 60.471800][ T6788] ? __ext4_mark_inode_dirty+0x940/0x940 [ 60.477424][ T6788] ? do_writepages+0xfa/0x2a0 [ 60.482079][ T6788] do_writepages+0xfa/0x2a0 [ 60.486574][ T6788] ? page_writeback_cpu_online+0x10/0x10 [ 60.492190][ T6788] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.497713][ T6788] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.503685][ T6788] ? lock_downgrade+0x840/0x840 [ 60.508549][ T6788] __writeback_single_inode+0x12a/0x13d0 [ 60.514189][ T6788] ? _raw_spin_unlock+0x24/0x40 [ 60.519035][ T6788] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 60.525007][ T6788] writeback_sb_inodes+0x515/0xdc0 [ 60.530113][ T6788] ? __writeback_single_inode+0x13d0/0x13d0 [ 60.536008][ T6788] __writeback_inodes_wb+0xc3/0x250 [ 60.541191][ T6788] wb_writeback+0x8db/0xd50 [ 60.545715][ T6788] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 60.552046][ T6788] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 60.557940][ T6788] ? cpumask_next+0x3c/0x40 [ 60.562429][ T6788] ? get_nr_dirty_inodes+0xd6/0x130 [ 60.567611][ T6788] wb_workfn+0xab3/0x1090 [ 60.572113][ T6788] ? inode_wait_for_writeback+0x30/0x30 [ 60.577766][ T6788] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.583319][ T6788] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.589291][ T6788] process_one_work+0x965/0x1690 [ 60.594244][ T6788] ? lock_release+0x800/0x800 [ 60.598902][ T6788] ? pwq_dec_nr_in_flight+0x310/0x310 [ 60.604784][ T6788] ? rwlock_bug.part.0+0x90/0x90 [ 60.609723][ T6788] worker_thread+0x96/0xe10 [ 60.614224][ T6788] ? process_one_work+0x1690/0x1690 [ 60.621522][ T6788] kthread+0x3b5/0x4a0 [ 60.625572][ T6788] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.631270][ T6788] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.637026][ T6788] ret_from_fork+0x1f/0x30 Warning: Permanently added '10.128.15.204' (ECDSA) to the list of known hosts. 2020/06/14 22:36:54 fuzzer started 2020/06/14 22:36:54 connecting to host at 10.128.0.26:46407 2020/06/14 22:36:54 checking machine... 2020/06/14 22:36:54 checking revisions... 2020/06/14 22:36:54 testing simple program... [ 63.095358][ T6836] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6836 [ 63.104518][ T6836] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.110682][ T6836] CPU: 1 PID: 6836 Comm: syz-fuzzer Not tainted 5.7.0-syzkaller #0 [ 63.118579][ T6836] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.128622][ T6836] Call Trace: [ 63.131927][ T6836] dump_stack+0x18f/0x20d [ 63.136243][ T6836] check_preemption_disabled+0x20d/0x220 [ 63.142077][ T6836] ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.147179][ T6836] ? ext4_ext_search_right+0x2ca/0xb20 [ 63.152628][ T6836] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 63.158348][ T6836] ext4_ext_map_blocks+0x201b/0x33e0 [ 63.163758][ T6836] ? ext4_ext_release+0x10/0x10 [ 63.168605][ T6836] ? down_write_killable+0x170/0x170 [ 63.173878][ T6836] ? ext4_es_lookup_extent+0x41d/0xd10 [ 63.179320][ T6836] ext4_map_blocks+0x4cb/0x1640 [ 63.184172][ T6836] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 63.189351][ T6836] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.194876][ T6836] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.200834][ T6836] ? prandom_u32_state+0xe/0x170 [ 63.205752][ T6836] ? __brelse+0x84/0xa0 [ 63.209889][ T6836] ? __ext4_new_inode+0x144/0x55e0 [ 63.214978][ T6836] ext4_getblk+0xad/0x520 [ 63.219288][ T6836] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 63.225007][ T6836] ? ext4_free_inode+0x1700/0x1700 [ 63.230100][ T6836] ext4_bread+0x7c/0x380 [ 63.234342][ T6836] ? ext4_getblk+0x520/0x520 [ 63.238911][ T6836] ? dquot_get_next_dqblk+0x180/0x180 [ 63.244274][ T6836] ext4_append+0x153/0x360 [ 63.248672][ T6836] ext4_mkdir+0x5e0/0xdf0 [ 63.253075][ T6836] ? ext4_rmdir+0xde0/0xde0 [ 63.257576][ T6836] ? security_inode_permission+0xc4/0xf0 [ 63.263212][ T6836] vfs_mkdir+0x419/0x690 [ 63.267783][ T6836] do_mkdirat+0x21e/0x280 [ 63.272107][ T6836] ? __ia32_sys_mknod+0xb0/0xb0 [ 63.276939][ T6836] ? do_syscall_64+0x1c/0xe0 [ 63.281510][ T6836] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 63.287470][ T6836] do_syscall_64+0x60/0xe0 [ 63.292043][ T6836] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.297913][ T6836] RIP: 0033:0x4b02a0 [ 63.301783][ T6836] Code: Bad RIP value. [ 63.305825][ T6836] RSP: 002b:000000c0000d54b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 63.314226][ T6836] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 [ 63.322176][ T6836] RDX: 00000000000001c0 RSI: 000000c0000269c0 RDI: ffffffffffffff9c [ 63.330230][ T6836] RBP: 000000c0000d5510 R08: 0000000000000000 R09: 0000000000000000 [ 63.338178][ T6836] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 63.348043][ T6836] R13: 000000000000004f R14: 000000000000004e R15: 0000000000000100 [ 63.374839][ T6842] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6842 [ 63.384397][ T6842] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.390446][ T6842] CPU: 0 PID: 6842 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 63.398768][ T6842] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.408809][ T6842] Call Trace: [ 63.412123][ T6842] dump_stack+0x18f/0x20d [ 63.416500][ T6842] check_preemption_disabled+0x20d/0x220 [ 63.422193][ T6842] ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.427353][ T6842] ? ext4_ext_search_right+0x2ca/0xb20 [ 63.432808][ T6842] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 63.438534][ T6842] ext4_ext_map_blocks+0x201b/0x33e0 [ 63.443852][ T6842] ? ext4_ext_release+0x10/0x10 [ 63.448711][ T6842] ? down_write_killable+0x170/0x170 [ 63.453998][ T6842] ? ext4_es_lookup_extent+0x41d/0xd10 [ 63.459479][ T6842] ext4_map_blocks+0x4cb/0x1640 [ 63.464514][ T6842] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 63.469882][ T6842] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.475457][ T6842] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.481442][ T6842] ? prandom_u32_state+0xe/0x170 [ 63.486454][ T6842] ? __brelse+0x84/0xa0 [ 63.490627][ T6842] ? __ext4_new_inode+0x144/0x55e0 [ 63.495756][ T6842] ext4_getblk+0xad/0x520 [ 63.500616][ T6842] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 63.506863][ T6842] ? ext4_free_inode+0x1700/0x1700 [ 63.513377][ T6842] ext4_bread+0x7c/0x380 [ 63.517728][ T6842] ? ext4_getblk+0x520/0x520 [ 63.522554][ T6842] ? dquot_get_next_dqblk+0x180/0x180 [ 63.528015][ T6842] ext4_append+0x153/0x360 [ 63.532430][ T6842] ext4_mkdir+0x5e0/0xdf0 [ 63.536771][ T6842] ? ext4_rmdir+0xde0/0xde0 [ 63.541278][ T6842] ? security_inode_permission+0xc4/0xf0 [ 63.547266][ T6842] vfs_mkdir+0x419/0x690 [ 63.551596][ T6842] do_mkdirat+0x21e/0x280 [ 63.556065][ T6842] ? __ia32_sys_mknod+0xb0/0xb0 [ 63.561077][ T6842] ? do_syscall_64+0x1c/0xe0 [ 63.565695][ T6842] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 63.571673][ T6842] do_syscall_64+0x60/0xe0 [ 63.576107][ T6842] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.581985][ T6842] RIP: 0033:0x45bee7 [ 63.585868][ T6842] Code: Bad RIP value. [ 63.589952][ T6842] RSP: 002b:00007ffd810aa548 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 63.599190][ T6842] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bee7 [ 63.607161][ T6842] RDX: 0000000000000003 RSI: 00000000000001c0 RDI: 00007ffd810aa720 [ 63.615160][ T6842] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 00000000000037c0 [ 63.623207][ T6842] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 63.631188][ T6842] R13: 00007ffd810aa720 R14: 8421084210842109 R15: 00007ffd810aa72c [ 63.731485][ T6843] IPVS: ftp: loaded support on port[0] = 21 [ 63.774531][ T6843] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6843 [ 63.784441][ T6843] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.790703][ T6843] CPU: 1 PID: 6843 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 63.798967][ T6843] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.809013][ T6843] Call Trace: [ 63.812321][ T6843] dump_stack+0x18f/0x20d [ 63.816777][ T6843] check_preemption_disabled+0x20d/0x220 [ 63.822436][ T6843] ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.827550][ T6843] ? ext4_ext_search_right+0x2ca/0xb20 [ 63.833016][ T6843] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 63.838726][ T6843] ext4_ext_map_blocks+0x201b/0x33e0 [ 63.844079][ T6843] ? ext4_ext_release+0x10/0x10 [ 63.849054][ T6843] ? down_write_killable+0x170/0x170 [ 63.854348][ T6843] ? ext4_es_lookup_extent+0x41d/0xd10 [ 63.859912][ T6843] ext4_map_blocks+0x4cb/0x1640 [ 63.864771][ T6843] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 63.869955][ T6843] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 63.875504][ T6843] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.883059][ T6843] ? prandom_u32_state+0xe/0x170 [ 63.888018][ T6843] ? __brelse+0x84/0xa0 [ 63.892186][ T6843] ? __ext4_new_inode+0x144/0x55e0 [ 63.897322][ T6843] ext4_getblk+0xad/0x520 [ 63.901664][ T6843] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 63.907387][ T6843] ? ext4_free_inode+0x1700/0x1700 [ 63.912520][ T6843] ext4_bread+0x7c/0x380 [ 63.916764][ T6843] ? ext4_getblk+0x520/0x520 [ 63.921345][ T6843] ? dquot_get_next_dqblk+0x180/0x180 [ 63.926718][ T6843] ext4_append+0x153/0x360 [ 63.931160][ T6843] ext4_mkdir+0x5e0/0xdf0 [ 63.935506][ T6843] ? ext4_rmdir+0xde0/0xde0 [ 63.940005][ T6843] ? security_inode_permission+0xc4/0xf0 [ 63.945676][ T6843] vfs_mkdir+0x419/0x690 [ 63.949903][ T6843] do_mkdirat+0x21e/0x280 [ 63.954214][ T6843] ? __ia32_sys_mknod+0xb0/0xb0 [ 63.959059][ T6843] ? do_syscall_64+0x1c/0xe0 [ 63.963673][ T6843] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 63.969666][ T6843] do_syscall_64+0x60/0xe0 [ 63.974093][ T6843] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.980155][ T6843] RIP: 0033:0x45bee7 [ 63.984024][ T6843] Code: Bad RIP value. [ 63.988081][ T6843] RSP: 002b:00007ffd810aa438 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 63.996479][ T6843] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bee7 [ 64.004553][ T6843] RDX: 00007ffd810aa483 RSI: 00000000000001ff RDI: 00007ffd810aa480 [ 64.012624][ T6843] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 64.020592][ T6843] R10: 0000000000000064 R11: 0000000000000202 R12: 00000000004185d0 [ 64.028552][ T6843] R13: 00007ffd810aa470 R14: 0000000000000000 R15: 00007ffd810aa480 [ 64.078719][ T6843] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6843 [ 64.088480][ T6843] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.094573][ T6843] CPU: 0 PID: 6843 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 64.103424][ T6843] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.113510][ T6843] Call Trace: [ 64.117034][ T6843] dump_stack+0x18f/0x20d [ 64.121472][ T6843] check_preemption_disabled+0x20d/0x220 [ 64.127543][ T6843] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.132688][ T6843] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.138313][ T6843] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.144330][ T6843] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.149747][ T6843] ? ext4_ext_release+0x10/0x10 [ 64.154702][ T6843] ? down_write_killable+0x170/0x170 [ 64.159985][ T6843] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.165445][ T6843] ext4_map_blocks+0x4cb/0x1640 [ 64.170297][ T6843] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.175475][ T6843] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.181012][ T6843] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.187011][ T6843] ? prandom_u32_state+0xe/0x170 [ 64.191977][ T6843] ? __brelse+0x84/0xa0 [ 64.196135][ T6843] ? __ext4_new_inode+0x144/0x55e0 [ 64.201262][ T6843] ext4_getblk+0xad/0x520 [ 64.205572][ T6843] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 64.211284][ T6843] ? ext4_free_inode+0x1700/0x1700 [ 64.216546][ T6843] ext4_bread+0x7c/0x380 [ 64.221888][ T6843] ? ext4_getblk+0x520/0x520 [ 64.226481][ T6843] ? dquot_get_next_dqblk+0x180/0x180 [ 64.231845][ T6843] ext4_append+0x153/0x360 [ 64.236263][ T6843] ext4_mkdir+0x5e0/0xdf0 [ 64.240667][ T6843] ? ext4_rmdir+0xde0/0xde0 [ 64.245252][ T6843] ? security_inode_permission+0xc4/0xf0 [ 64.250886][ T6843] vfs_mkdir+0x419/0x690 [ 64.255111][ T6843] do_mkdirat+0x21e/0x280 [ 64.259422][ T6843] ? __ia32_sys_mknod+0xb0/0xb0 [ 64.264257][ T6843] ? do_syscall_64+0x1c/0xe0 [ 64.268828][ T6843] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.274888][ T6843] do_syscall_64+0x60/0xe0 [ 64.279287][ T6843] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.285169][ T6843] RIP: 0033:0x45bee7 [ 64.289057][ T6843] Code: Bad RIP value. [ 64.293110][ T6843] RSP: 002b:00007ffd810aa438 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 64.301530][ T6843] RAX: ffffffffffffffda RBX: 000000000000fa4d RCX: 000000000045bee7 [ 64.309492][ T6843] RDX: 00007ffd810aa483 RSI: 00000000000001ff RDI: 00007ffd810aa480 [ 64.317693][ T6843] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 2020/06/14 22:36:55 building call list... [ 64.325650][ T6843] R10: 0000000000000064 R11: 0000000000000202 R12: 0000000000000003 [ 64.333607][ T6843] R13: 00007ffd810aa470 R14: 000000000000fa3f R15: 00007ffd810aa480 [ 64.589683][ T7] tipc: TX() has been purged, node left! [ 65.092105][ T7] ================================================================== [ 65.100355][ T7] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 65.108248][ T7] Write of size 1 at addr ffff888092dce1e4 by task kworker/u4:0/7 [ 65.116038][ T7] [ 65.118369][ T7] CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.7.0-syzkaller #0 [ 65.126157][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.136303][ T7] Workqueue: netns cleanup_net [ 65.141060][ T7] Call Trace: [ 65.144359][ T7] dump_stack+0x18f/0x20d [ 65.148702][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 65.154249][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 65.159797][ T7] ? afs_put_call+0xa40/0xa40 [ 65.164482][ T7] print_address_description.constprop.0.cold+0xd3/0x413 [ 65.171509][ T7] ? vprintk_func+0x97/0x1a6 [ 65.176280][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 65.181819][ T7] kasan_report.cold+0x1f/0x37 [ 65.186583][ T7] ? rcu_read_lock_held+0x81/0xb0 [ 65.191630][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 65.197197][ T7] afs_wake_up_async_call+0x6aa/0x770 [ 65.202561][ T7] ? afs_close_socket+0x320/0x320 [ 65.207696][ T7] ? afs_put_call+0xa40/0xa40 [ 65.212384][ T7] rxrpc_notify_socket+0x1db/0x5d0 [ 65.217514][ T7] ? afs_put_call+0xa40/0xa40 [ 65.222195][ T7] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 65.229962][ T7] rxrpc_call_completed+0xca/0xf0 [ 65.235240][ T7] rxrpc_discard_prealloc+0x781/0xab0 [ 65.241170][ T7] ? lock_sock_nested+0x94/0x110 [ 65.246153][ T7] rxrpc_listen+0x147/0x360 [ 65.250667][ T7] afs_close_socket+0x95/0x320 [ 65.255433][ T7] ? afs_purge_servers+0x16d/0x300 [ 65.260653][ T7] ? afs_rx_discard_new_call+0x50/0x50 [ 65.266115][ T7] ? init_wait_var_entry+0x200/0x200 [ 65.271489][ T7] ? rcu_read_lock_held_common+0xa0/0xa0 [ 65.277238][ T7] ? check_preemption_disabled+0x38/0x220 [ 65.282961][ T7] afs_net_exit+0x1bc/0x310 [ 65.287461][ T7] ? afs_net_init+0xe30/0xe30 [ 65.292139][ T7] ops_exit_list.isra.0+0xa8/0x150 [ 65.297276][ T7] cleanup_net+0x511/0xa50 [ 65.301736][ T7] ? unregister_pernet_device+0x70/0x70 [ 65.307321][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.313508][ T7] process_one_work+0x965/0x1690 [ 65.318479][ T7] ? lock_release+0x800/0x800 [ 65.323161][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 65.328553][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 65.333498][ T7] worker_thread+0x96/0xe10 [ 65.338011][ T7] ? process_one_work+0x1690/0x1690 [ 65.343209][ T7] kthread+0x3b5/0x4a0 [ 65.347271][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.352991][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.358710][ T7] ret_from_fork+0x1f/0x30 [ 65.363150][ T7] [ 65.365506][ T7] Allocated by task 6843: [ 65.369847][ T7] save_stack+0x1b/0x40 [ 65.374018][ T7] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 65.380006][ T7] kmem_cache_alloc_trace+0x153/0x7d0 [ 65.385648][ T7] afs_alloc_call+0x55/0x630 [ 65.390372][ T7] afs_charge_preallocation+0xe9/0x2d0 [ 65.395834][ T7] afs_open_socket+0x292/0x360 [ 65.400619][ T7] afs_net_init+0xa6c/0xe30 [ 65.405120][ T7] ops_init+0xaf/0x420 [ 65.409181][ T7] setup_net+0x2de/0x860 [ 65.413582][ T7] copy_net_ns+0x293/0x590 [ 65.417999][ T7] create_new_namespaces+0x3fb/0xb30 [ 65.423283][ T7] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 65.428914][ T7] ksys_unshare+0x43d/0x8e0 [ 65.433416][ T7] __x64_sys_unshare+0x2d/0x40 [ 65.438174][ T7] do_syscall_64+0x60/0xe0 [ 65.442847][ T7] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.448725][ T7] [ 65.451065][ T7] Freed by task 7: [ 65.454783][ T7] save_stack+0x1b/0x40 [ 65.458950][ T7] __kasan_slab_free+0xf7/0x140 [ 65.463793][ T7] kfree+0x109/0x2b0 [ 65.467683][ T7] afs_put_call+0x585/0xa40 [ 65.472187][ T7] rxrpc_discard_prealloc+0x764/0xab0 [ 65.477552][ T7] rxrpc_listen+0x147/0x360 [ 65.482059][ T7] afs_close_socket+0x95/0x320 [ 65.486818][ T7] afs_net_exit+0x1bc/0x310 [ 65.492533][ T7] ops_exit_list.isra.0+0xa8/0x150 [ 65.497637][ T7] cleanup_net+0x511/0xa50 [ 65.502061][ T7] process_one_work+0x965/0x1690 [ 65.510652][ T7] worker_thread+0x96/0xe10 [ 65.515171][ T7] kthread+0x3b5/0x4a0 [ 65.519239][ T7] ret_from_fork+0x1f/0x30 [ 65.523650][ T7] [ 65.525978][ T7] The buggy address belongs to the object at ffff888092dce000 [ 65.525978][ T7] which belongs to the cache kmalloc-1k of size 1024 [ 65.540117][ T7] The buggy address is located 484 bytes inside of [ 65.540117][ T7] 1024-byte region [ffff888092dce000, ffff888092dce400) [ 65.553598][ T7] The buggy address belongs to the page: [ 65.559255][ T7] page:ffffea00024b7380 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 65.568362][ T7] flags: 0xfffe0000000200(slab) [ 65.573406][ T7] raw: 00fffe0000000200 ffffea0002a2b948 ffffea00029d7008 ffff8880aa000c40 [ 65.582147][ T7] raw: 0000000000000000 ffff888092dce000 0000000100000002 0000000000000000 [ 65.590746][ T7] page dumped because: kasan: bad access detected [ 65.597154][ T7] [ 65.599479][ T7] Memory state around the buggy address: [ 65.605109][ T7] ffff888092dce080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 65.613167][ T7] ffff888092dce100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 65.621229][ T7] >ffff888092dce180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 65.629293][ T7] ^ [ 65.636511][ T7] ffff888092dce200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 65.644658][ T7] ffff888092dce280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 65.653334][ T7] ================================================================== [ 65.661394][ T7] Disabling lock debugging due to kernel taint [ 65.667602][ T7] Kernel panic - not syncing: panic_on_warn set ... [ 65.674230][ T7] CPU: 0 PID: 7 Comm: kworker/u4:0 Tainted: G B 5.7.0-syzkaller #0 [ 65.683942][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.694001][ T7] Workqueue: netns cleanup_net [ 65.698764][ T7] Call Trace: [ 65.702073][ T7] dump_stack+0x18f/0x20d [ 65.706397][ T7] ? afs_wake_up_async_call+0x5f0/0x770 [ 65.711953][ T7] ? afs_put_call+0xa40/0xa40 [ 65.716635][ T7] panic+0x2e3/0x75c [ 65.720531][ T7] ? __warn_printk+0xf3/0xf3 [ 65.725147][ T7] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 65.731300][ T7] ? trace_hardirqs_on+0x55/0x220 [ 65.736351][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 65.741888][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 65.747421][ T7] ? afs_put_call+0xa40/0xa40 [ 65.752092][ T7] end_report+0x4d/0x53 [ 65.756243][ T7] kasan_report.cold+0xd/0x37 [ 65.760916][ T7] ? rcu_read_lock_held+0x81/0xb0 [ 65.765933][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 65.771474][ T7] afs_wake_up_async_call+0x6aa/0x770 [ 65.777029][ T7] ? afs_close_socket+0x320/0x320 [ 65.782073][ T7] ? afs_put_call+0xa40/0xa40 [ 65.786742][ T7] rxrpc_notify_socket+0x1db/0x5d0 [ 65.791853][ T7] ? afs_put_call+0xa40/0xa40 [ 65.796524][ T7] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 65.802931][ T7] rxrpc_call_completed+0xca/0xf0 [ 65.807960][ T7] rxrpc_discard_prealloc+0x781/0xab0 [ 65.813352][ T7] ? lock_sock_nested+0x94/0x110 [ 65.818281][ T7] rxrpc_listen+0x147/0x360 [ 65.822781][ T7] afs_close_socket+0x95/0x320 [ 65.827536][ T7] ? afs_purge_servers+0x16d/0x300 [ 65.832637][ T7] ? afs_rx_discard_new_call+0x50/0x50 [ 65.838178][ T7] ? init_wait_var_entry+0x200/0x200 [ 65.843458][ T7] ? rcu_read_lock_held_common+0xa0/0xa0 [ 65.849080][ T7] ? check_preemption_disabled+0x38/0x220 [ 65.854808][ T7] afs_net_exit+0x1bc/0x310 [ 65.859315][ T7] ? afs_net_init+0xe30/0xe30 [ 65.863992][ T7] ops_exit_list.isra.0+0xa8/0x150 [ 65.869101][ T7] cleanup_net+0x511/0xa50 [ 65.873516][ T7] ? unregister_pernet_device+0x70/0x70 [ 65.879077][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.885068][ T7] process_one_work+0x965/0x1690 [ 65.890020][ T7] ? lock_release+0x800/0x800 [ 65.894708][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 65.900094][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 65.905041][ T7] worker_thread+0x96/0xe10 [ 65.909562][ T7] ? process_one_work+0x1690/0x1690 [ 65.914799][ T7] kthread+0x3b5/0x4a0 [ 65.918870][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.925290][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.931413][ T7] ret_from_fork+0x1f/0x30 [ 65.938442][ T7] Kernel Offset: disabled [ 65.942775][ T7] Rebooting in 86400 seconds..