Warning: Permanently added '10.128.0.116' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 68.141731][ T9383] ================================================================== [ 68.149843][ T9383] BUG: KASAN: use-after-free in __lock_acquire+0x3e6f/0x54c0 [ 68.157241][ T9383] Read of size 8 at addr ffff888030dc08d0 by task syz-executor199/9383 [ 68.165483][ T9383] [ 68.167804][ T9383] CPU: 1 PID: 9383 Comm: syz-executor199 Not tainted 5.11.0-next-20210224-syzkaller #0 [ 68.177433][ T9383] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.187492][ T9383] Call Trace: executing program [ 68.190769][ T9383] dump_stack+0xfa/0x151 [ 68.195038][ T9383] ? __lock_acquire+0x3e6f/0x54c0 [ 68.200070][ T9383] print_address_description.constprop.0.cold+0x5b/0x2f8 [ 68.207105][ T9383] ? __lock_acquire+0x3e6f/0x54c0 [ 68.212137][ T9383] ? __lock_acquire+0x3e6f/0x54c0 [ 68.217173][ T9383] kasan_report.cold+0x7c/0xd8 [ 68.221950][ T9383] ? __lock_acquire+0x3e6f/0x54c0 [ 68.226997][ T9383] __lock_acquire+0x3e6f/0x54c0 [ 68.231868][ T9383] ? lock_acquire+0x1bb/0x730 executing program executing program [ 68.236552][ T9383] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 68.242548][ T9383] lock_acquire+0x1ab/0x730 [ 68.247062][ T9383] ? try_to_wake_up+0x98/0x14a0 [ 68.251927][ T9383] ? lock_release+0x710/0x710 [ 68.256609][ T9383] ? lock_downgrade+0x6d0/0x6d0 [ 68.261464][ T9383] ? __cpuhp_state_remove_instance+0x15e/0x5b0 [ 68.267628][ T9383] ? lock_is_held_type+0xd5/0x130 [ 68.272663][ T9383] ? _raw_spin_lock_irqsave+0x4e/0x50 [ 68.278049][ T9383] _raw_spin_lock_irqsave+0x39/0x50 [ 68.283258][ T9383] ? try_to_wake_up+0x98/0x14a0 executing program executing program [ 68.288116][ T9383] try_to_wake_up+0x98/0x14a0 [ 68.292806][ T9383] ? migrate_swap_stop+0x9f0/0x9f0 [ 68.297927][ T9383] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 68.304185][ T9383] ? __cpuhp_state_remove_instance+0x3de/0x5b0 [ 68.310358][ T9383] io_wq_destroy+0x74/0x3d0 [ 68.314875][ T9383] __io_uring_files_cancel+0x195/0x230 [ 68.320346][ T9383] ? __io_uring_free+0xc0/0xc0 [ 68.325121][ T9383] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 68.331374][ T9383] ? __validate_process_creds+0x20c/0x370 [ 68.337108][ T9383] do_exit+0x299/0x2a60 executing program [ 68.341273][ T9383] ? find_held_lock+0x2d/0x110 [ 68.346043][ T9383] ? lock_release+0x3bb/0x710 [ 68.350724][ T9383] ? mm_update_next_owner+0x7a0/0x7a0 [ 68.356105][ T9383] ? lock_downgrade+0x6d0/0x6d0 [ 68.360968][ T9383] ? _raw_spin_unlock_irq+0x1f/0x40 [ 68.366187][ T9383] do_group_exit+0x125/0x310 [ 68.370789][ T9383] __x64_sys_exit_group+0x3a/0x50 [ 68.375819][ T9383] do_syscall_64+0x2d/0x70 [ 68.380245][ T9383] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 68.386141][ T9383] RIP: 0033:0x43e989 [ 68.390133][ T9383] Code: 00 49 c7 c0 c0 ff ff ff be e7 00 00 00 ba 3c 00 00 00 eb 12 0f 1f 44 00 00 89 d0 0f 05 48 3d 00 f0 ff ff 77 1c f4 89 f0 0f 05 <48> 3d 00 f0 ff ff 76 e7 f7 d8 64 41 89 00 eb df 0f 1f 80 00 00 00 [ 68.409749][ T9383] RSP: 002b:00007ffe3a2de828 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 68.418176][ T9383] RAX: ffffffffffffffda RBX: 00000000004b02f0 RCX: 000000000043e989 [ 68.426158][ T9383] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 68.434140][ T9383] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000010000000 [ 68.442116][ T9383] R10: 0000000000008011 R11: 0000000000000246 R12: 00000000004b02f0 [ 68.450091][ T9383] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 68.458078][ T9383] [ 68.460400][ T9383] Allocated by task 9383: [ 68.464723][ T9383] kasan_save_stack+0x1b/0x40 [ 68.469409][ T9383] __kasan_slab_alloc+0x75/0x90 [ 68.474265][ T9383] kmem_cache_alloc_node+0x16d/0x3c0 [ 68.479553][ T9383] copy_process+0x613/0x6fd0 [ 68.484150][ T9383] kernel_clone+0xe7/0xab0 [ 68.488599][ T9383] io_wq_fork_thread+0xa7/0xe0 [ 68.493374][ T9383] io_wq_create+0x81c/0xab0 [ 68.497886][ T9383] io_uring_alloc_task_context+0x185/0x510 [ 68.503695][ T9383] io_uring_add_task_file+0x261/0x350 [ 68.509069][ T9383] io_uring_setup+0x14c7/0x2c20 [ 68.513922][ T9383] do_syscall_64+0x2d/0x70 [ 68.518350][ T9383] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 68.524251][ T9383] [ 68.526569][ T9383] Freed by task 12: [ 68.530367][ T9383] kasan_save_stack+0x1b/0x40 [ 68.535048][ T9383] kasan_set_track+0x1c/0x30 [ 68.539638][ T9383] kasan_set_free_info+0x20/0x30 [ 68.544581][ T9383] __kasan_slab_free+0xf5/0x130 [ 68.549445][ T9383] slab_free_freelist_hook+0x72/0x1b0 [ 68.554826][ T9383] kmem_cache_free+0x8b/0x730 [ 68.559507][ T9383] __put_task_struct+0x267/0x3f0 [ 68.564446][ T9383] delayed_put_task_struct+0x1f6/0x340 [ 68.569927][ T9383] rcu_core+0x722/0x1280 [ 68.574176][ T9383] __do_softirq+0x29b/0x9f6 [ 68.578688][ T9383] [ 68.581004][ T9383] Last potentially related work creation: [ 68.586708][ T9383] kasan_save_stack+0x1b/0x40 [ 68.591389][ T9383] kasan_record_aux_stack+0xe5/0x110 [ 68.596677][ T9383] call_rcu+0xb1/0x700 [ 68.600749][ T9383] put_task_struct_rcu_user+0x7f/0xb0 [ 68.606128][ T9383] __schedule+0x914/0x21a0 [ 68.610558][ T9383] preempt_schedule_common+0x45/0xc0 [ 68.615849][ T9383] preempt_schedule_thunk+0x16/0x18 [ 68.621055][ T9383] _raw_spin_unlock_irqrestore+0x46/0x50 [ 68.626695][ T9383] io_wq_manager+0x13c/0x5b0 [ 68.631290][ T9383] ret_from_fork+0x1f/0x30 [ 68.635708][ T9383] [ 68.638027][ T9383] The buggy address belongs to the object at ffff888030dc0000 [ 68.638027][ T9383] which belongs to the cache task_struct of size 6912 [ 68.652425][ T9383] The buggy address is located 2256 bytes inside of [ 68.652425][ T9383] 6912-byte region [ffff888030dc0000, ffff888030dc1b00) [ 68.665872][ T9383] The buggy address belongs to the page: [ 68.671497][ T9383] page:00000000deb921bd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x30dc0 [ 68.681661][ T9383] head:00000000deb921bd order:3 compound_mapcount:0 compound_pincount:0 [ 68.689988][ T9383] flags: 0xfff00000010200(slab|head) [ 68.695286][ T9383] raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888140004000 [ 68.703879][ T9383] raw: 0000000000000000 0000000080040004 00000001ffffffff 0000000000000000 [ 68.712457][ T9383] page dumped because: kasan: bad access detected [ 68.718861][ T9383] [ 68.721176][ T9383] Memory state around the buggy address: [ 68.726802][ T9383] ffff888030dc0780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.735742][ T9383] ffff888030dc0800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.743807][ T9383] >ffff888030dc0880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.751865][ T9383] ^ [ 68.758537][ T9383] ffff888030dc0900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.766602][ T9383] ffff888030dc0980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.774658][ T9383] ================================================================== [ 68.782708][ T9383] Disabling lock debugging due to kernel taint [ 68.788856][ T9383] Kernel panic - not syncing: panic_on_warn set ... [ 68.795556][ T9383] CPU: 1 PID: 9383 Comm: syz-executor199 Tainted: G B 5.11.0-next-20210224-syzkaller #0 [ 68.806578][ T9383] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.816632][ T9383] Call Trace: [ 68.819908][ T9383] dump_stack+0xfa/0x151 [ 68.824163][ T9383] panic+0x306/0x73d [ 68.828069][ T9383] ? __warn_printk+0xf3/0xf3 [ 68.832676][ T9383] ? __lock_acquire+0x3e6f/0x54c0 [ 68.837801][ T9383] ? __lock_acquire+0x3e6f/0x54c0 [ 68.842841][ T9383] ? __lock_acquire+0x3e6f/0x54c0 [ 68.847870][ T9383] end_report.cold+0x5a/0x5a [ 68.852468][ T9383] kasan_report.cold+0x6a/0xd8 [ 68.857248][ T9383] ? __lock_acquire+0x3e6f/0x54c0 [ 68.862284][ T9383] __lock_acquire+0x3e6f/0x54c0 [ 68.867320][ T9383] ? lock_acquire+0x1bb/0x730 [ 68.872113][ T9383] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 68.878194][ T9383] lock_acquire+0x1ab/0x730 [ 68.882704][ T9383] ? try_to_wake_up+0x98/0x14a0 [ 68.887561][ T9383] ? lock_release+0x710/0x710 [ 68.892243][ T9383] ? lock_downgrade+0x6d0/0x6d0 [ 68.897102][ T9383] ? __cpuhp_state_remove_instance+0x15e/0x5b0 [ 68.903267][ T9383] ? lock_is_held_type+0xd5/0x130 [ 68.908563][ T9383] ? _raw_spin_lock_irqsave+0x4e/0x50 [ 68.913946][ T9383] _raw_spin_lock_irqsave+0x39/0x50 [ 68.919150][ T9383] ? try_to_wake_up+0x98/0x14a0 [ 68.924006][ T9383] try_to_wake_up+0x98/0x14a0 [ 68.928695][ T9383] ? migrate_swap_stop+0x9f0/0x9f0 [ 68.933818][ T9383] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 68.940064][ T9383] ? __cpuhp_state_remove_instance+0x3de/0x5b0 [ 68.946226][ T9383] io_wq_destroy+0x74/0x3d0 [ 68.950736][ T9383] __io_uring_files_cancel+0x195/0x230 [ 68.956226][ T9383] ? __io_uring_free+0xc0/0xc0 [ 68.960998][ T9383] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 68.967244][ T9383] ? __validate_process_creds+0x20c/0x370 [ 68.972971][ T9383] do_exit+0x299/0x2a60 [ 68.977135][ T9383] ? find_held_lock+0x2d/0x110 [ 68.981901][ T9383] ? lock_release+0x3bb/0x710 [ 68.986588][ T9383] ? mm_update_next_owner+0x7a0/0x7a0 [ 68.991964][ T9383] ? lock_downgrade+0x6d0/0x6d0 [ 68.996818][ T9383] ? _raw_spin_unlock_irq+0x1f/0x40 [ 69.002078][ T9383] do_group_exit+0x125/0x310 [ 69.006686][ T9383] __x64_sys_exit_group+0x3a/0x50 [ 69.011714][ T9383] do_syscall_64+0x2d/0x70 [ 69.016134][ T9383] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 69.022029][ T9383] RIP: 0033:0x43e989 [ 69.025922][ T9383] Code: 00 49 c7 c0 c0 ff ff ff be e7 00 00 00 ba 3c 00 00 00 eb 12 0f 1f 44 00 00 89 d0 0f 05 48 3d 00 f0 ff ff 77 1c f4 89 f0 0f 05 <48> 3d 00 f0 ff ff 76 e7 f7 d8 64 41 89 00 eb df 0f 1f 80 00 00 00 [ 69.045540][ T9383] RSP: 002b:00007ffe3a2de828 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 69.053959][ T9383] RAX: ffffffffffffffda RBX: 00000000004b02f0 RCX: 000000000043e989 [ 69.061936][ T9383] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 69.069908][ T9383] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000010000000 [ 69.077883][ T9383] R10: 0000000000008011 R11: 0000000000000246 R12: 00000000004b02f0 [ 69.085860][ T9383] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 69.094550][ T9383] Kernel Offset: disabled [ 69.099001][ T9383] Rebooting in 86400 seconds..