Warning: Permanently added '10.128.0.236' (ECDSA) to the list of known hosts.
2021/12/01 06:05:19 fuzzer started
2021/12/01 06:05:19 connecting to host at 10.128.0.169:39911
2021/12/01 06:05:19 checking machine...
2021/12/01 06:05:19 checking revisions...
2021/12/01 06:05:19 testing simple program...
syzkaller login: [ 72.800768][ T6519] cgroup: Unknown subsys name 'net'
[ 72.807055][ T6519]
[ 72.809570][ T6519] =========================
[ 72.814053][ T6519] WARNING: held lock freed!
[ 72.818559][ T6519] 5.16.0-rc3-next-20211201-syzkaller #0 Not tainted
[ 72.825228][ T6519] -------------------------
[ 72.829706][ T6519] syz-executor/6519 is freeing memory ffff88807c774400-ffff88807c7745ff, with a lock still held there!
[ 72.840789][ T6519] ffff88807c774548 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_destroy_root+0x81/0xb0
[ 72.850694][ T6519] 2 locks held by syz-executor/6519:
[ 72.855960][ T6519] #0: ffffffff8bbc4e48 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_lock_and_drain_offline+0xa5/0x900
[ 72.866477][ T6519] #1: ffff88807c774548 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_destroy_root+0x81/0xb0
[ 72.876909][ T6519]
[ 72.876909][ T6519] stack backtrace:
[ 72.882977][ T6519] CPU: 1 PID: 6519 Comm: syz-executor Not tainted 5.16.0-rc3-next-20211201-syzkaller #0
[ 72.892850][ T6519] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 72.902891][ T6519] Call Trace:
[ 72.906269][ T6519]
[ 72.909190][ T6519] dump_stack_lvl+0xcd/0x134
[ 72.913796][ T6519] debug_check_no_locks_freed.cold+0x9d/0xa9
[ 72.919780][ T6519] ? lockdep_hardirqs_on+0x79/0x100
[ 72.925183][ T6519] slab_free_freelist_hook+0x73/0x1c0
[ 72.930551][ T6519] ? kernfs_put.part.0+0x331/0x540
[ 72.935655][ T6519] kfree+0xe0/0x430
[ 72.939469][ T6519] ? kmem_cache_free+0xba/0x4a0
[ 72.944338][ T6519] ? rwlock_bug.part.0+0x90/0x90
[ 72.949265][ T6519] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70
[ 72.955510][ T6519] kernfs_put.part.0+0x331/0x540
[ 72.960443][ T6519] kernfs_put+0x42/0x50
[ 72.964600][ T6519] __kernfs_remove+0x7a3/0xb20
[ 72.969352][ T6519] ? kernfs_next_descendant_post+0x2f0/0x2f0
[ 72.975328][ T6519] ? down_write+0xde/0x150
[ 72.979736][ T6519] ? down_write_killable_nested+0x180/0x180
[ 72.985631][ T6519] kernfs_destroy_root+0x89/0xb0
[ 72.990571][ T6519] cgroup_setup_root+0x3a6/0xad0
[ 72.995503][ T6519] ? rebind_subsystems+0x10e0/0x10e0
[ 73.000795][ T6519] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80
[ 73.007126][ T6519] cgroup1_get_tree+0xd33/0x1390
[ 73.012060][ T6519] vfs_get_tree+0x89/0x2f0
[ 73.016471][ T6519] path_mount+0x1320/0x1fa0
[ 73.021039][ T6519] ? kmem_cache_free+0xba/0x4a0
[ 73.025888][ T6519] ? finish_automount+0xaf0/0xaf0
[ 73.030928][ T6519] ? putname+0xfe/0x140
[ 73.035216][ T6519] __x64_sys_mount+0x27f/0x300
[ 73.039977][ T6519] ? copy_mnt_ns+0xae0/0xae0
[ 73.044559][ T6519] ? syscall_enter_from_user_mode+0x21/0x70
[ 73.050445][ T6519] do_syscall_64+0x35/0xb0
[ 73.054943][ T6519] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 73.060850][ T6519] RIP: 0033:0x7f07e8f9a01a
[ 73.065257][ T6519] Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
[ 73.085028][ T6519] RSP: 002b:00007ffcf79494a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[ 73.093428][ T6519] RAX: ffffffffffffffda RBX: 00007ffcf7949638 RCX: 00007f07e8f9a01a
[ 73.101380][ T6519] RDX: 00007f07e8ffcfe2 RSI: 00007f07e8ff329a RDI: 00007f07e8ff1d71
[ 73.109615][ T6519] RBP: 00007f07e8ff329a R08: 00007f07e8ff33f7 R09: 0000000000000026
[ 73.117566][ T6519] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcf79494b0
[ 73.125691][ T6519] R13: 00007ffcf7949658 R14: 00007ffcf7949580 R15: 00007f07e8ff33f1
[ 73.133648][ T6519]
[ 73.150059][ T6519] ==================================================================
[ 73.158135][ T6519] BUG: KASAN: use-after-free in up_write+0x3ac/0x470
[ 73.164833][ T6519] Read of size 8 at addr ffff88807c774540 by task syz-executor/6519
[ 73.172983][ T6519]
[ 73.175290][ T6519] CPU: 1 PID: 6519 Comm: syz-executor Not tainted 5.16.0-rc3-next-20211201-syzkaller #0
[ 73.185077][ T6519] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 73.195129][ T6519] Call Trace:
[ 73.198393][ T6519]
[ 73.201310][ T6519] dump_stack_lvl+0xcd/0x134
[ 73.205891][ T6519] print_address_description.constprop.0.cold+0xa5/0x3ed
[ 73.213007][ T6519] ? up_write+0x3ac/0x470
[ 73.217525][ T6519] ? up_write+0x3ac/0x470
[ 73.221862][ T6519] kasan_report.cold+0x83/0xdf
[ 73.226793][ T6519] ? up_write+0x3ac/0x470
[ 73.231105][ T6519] up_write+0x3ac/0x470
[ 73.235240][ T6519] cgroup_setup_root+0x3a6/0xad0
[ 73.240161][ T6519] ? rebind_subsystems+0x10e0/0x10e0
[ 73.245426][ T6519] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80
[ 73.251739][ T6519] cgroup1_get_tree+0xd33/0x1390
[ 73.256686][ T6519] vfs_get_tree+0x89/0x2f0
[ 73.261085][ T6519] path_mount+0x1320/0x1fa0
[ 73.265675][ T6519] ? kmem_cache_free+0xba/0x4a0
[ 73.270527][ T6519] ? finish_automount+0xaf0/0xaf0
[ 73.275551][ T6519] ? putname+0xfe/0x140
[ 73.281970][ T6519] __x64_sys_mount+0x27f/0x300
[ 73.286731][ T6519] ? copy_mnt_ns+0xae0/0xae0
[ 73.291317][ T6519] ? syscall_enter_from_user_mode+0x21/0x70
[ 73.297319][ T6519] do_syscall_64+0x35/0xb0
[ 73.301749][ T6519] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 73.307638][ T6519] RIP: 0033:0x7f07e8f9a01a
[ 73.312210][ T6519] Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
[ 73.331979][ T6519] RSP: 002b:00007ffcf79494a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[ 73.340382][ T6519] RAX: ffffffffffffffda RBX: 00007ffcf7949638 RCX: 00007f07e8f9a01a
[ 73.348337][ T6519] RDX: 00007f07e8ffcfe2 RSI: 00007f07e8ff329a RDI: 00007f07e8ff1d71
[ 73.356286][ T6519] RBP: 00007f07e8ff329a R08: 00007f07e8ff33f7 R09: 0000000000000026
[ 73.364349][ T6519] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcf79494b0
[ 73.372753][ T6519] R13: 00007ffcf7949658 R14: 00007ffcf7949580 R15: 00007f07e8ff33f1
[ 73.380827][ T6519]
[ 73.383841][ T6519]
[ 73.386318][ T6519] Allocated by task 6519:
[ 73.390629][ T6519] kasan_save_stack+0x1e/0x50
[ 73.395296][ T6519] __kasan_kmalloc+0xa9/0xd0
[ 73.399869][ T6519] kernfs_create_root+0x4c/0x410
[ 73.404786][ T6519] cgroup_setup_root+0x243/0xad0
[ 73.409707][ T6519] cgroup1_get_tree+0xd33/0x1390
[ 73.414622][ T6519] vfs_get_tree+0x89/0x2f0
[ 73.419015][ T6519] path_mount+0x1320/0x1fa0
[ 73.423515][ T6519] __x64_sys_mount+0x27f/0x300
[ 73.428262][ T6519] do_syscall_64+0x35/0xb0
[ 73.432671][ T6519] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 73.438541][ T6519]
[ 73.440841][ T6519] Freed by task 6519:
[ 73.444891][ T6519] kasan_save_stack+0x1e/0x50
[ 73.449636][ T6519] kasan_set_track+0x21/0x30
[ 73.454207][ T6519] kasan_set_free_info+0x20/0x30
[ 73.459121][ T6519] __kasan_slab_free+0x103/0x170
[ 73.464124][ T6519] slab_free_freelist_hook+0x8b/0x1c0
[ 73.469736][ T6519] kfree+0xe0/0x430
[ 73.473527][ T6519] kernfs_put.part.0+0x331/0x540
[ 73.478457][ T6519] kernfs_put+0x42/0x50
[ 73.482600][ T6519] __kernfs_remove+0x7a3/0xb20
[ 73.487369][ T6519] kernfs_destroy_root+0x89/0xb0
[ 73.492295][ T6519] cgroup_setup_root+0x3a6/0xad0
[ 73.497222][ T6519] cgroup1_get_tree+0xd33/0x1390
[ 73.502146][ T6519] vfs_get_tree+0x89/0x2f0
[ 73.506547][ T6519] path_mount+0x1320/0x1fa0
[ 73.511032][ T6519] __x64_sys_mount+0x27f/0x300
[ 73.515822][ T6519] do_syscall_64+0x35/0xb0
[ 73.520221][ T6519] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 73.526186][ T6519]
[ 73.528663][ T6519] The buggy address belongs to the object at ffff88807c774400
[ 73.528663][ T6519] which belongs to the cache kmalloc-512 of size 512
[ 73.542690][ T6519] The buggy address is located 320 bytes inside of
[ 73.542690][ T6519] 512-byte region [ffff88807c774400, ffff88807c774600)
[ 73.555953][ T6519] The buggy address belongs to the page:
[ 73.561559][ T6519] page:ffffea0001f1dd00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7c774
[ 73.571774][ T6519] head:ffffea0001f1dd00 order:2 compound_mapcount:0 compound_pincount:0
[ 73.580081][ T6519] flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
[ 73.588048][ T6519] raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888010c41c80
[ 73.596608][ T6519] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
[ 73.605161][ T6519] page dumped because: kasan: bad access detected
[ 73.611547][ T6519] page_owner tracks the page as allocated
[ 73.617234][ T6519] page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, ts 19204486024, free_ts 16264076274
[ 73.636231][ T6519] get_page_from_freelist+0xa72/0x2f40
[ 73.641691][ T6519] __alloc_pages+0x1b2/0x500
[ 73.646281][ T6519] alloc_pages+0x1a7/0x300
[ 73.650821][ T6519] new_slab+0x261/0x460
[ 73.654957][ T6519] ___slab_alloc+0x798/0xf30
[ 73.659526][ T6519] __slab_alloc.constprop.0+0x4d/0xa0
[ 73.664880][ T6519] kmem_cache_alloc_trace+0x289/0x2c0
[ 73.670236][ T6519] pids_css_alloc+0x3d/0x150
[ 73.674816][ T6519] cgroup_apply_control_enable+0x4b8/0xc00
[ 73.680605][ T6519] cgroup_mkdir+0x597/0x1380
[ 73.685169][ T6519] kernfs_iop_mkdir+0x146/0x1d0
[ 73.690174][ T6519] vfs_mkdir+0x1c3/0x3b0
[ 73.694398][ T6519] do_mkdirat+0x285/0x300
[ 73.698710][ T6519] __x64_sys_mkdir+0xf2/0x140
[ 73.703379][ T6519] do_syscall_64+0x35/0xb0
[ 73.707771][ T6519] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 73.713646][ T6519] page last free stack trace:
[ 73.718292][ T6519] free_pcp_prepare+0x414/0xb60
[ 73.723119][ T6519] free_unref_page+0x19/0x690
[ 73.727793][ T6519] free_contig_range+0xb1/0x180
[ 73.732621][ T6519] destroy_args+0xa8/0x646
[ 73.737018][ T6519] debug_vm_pgtable+0x2a31/0x2ac3
[ 73.742116][ T6519] do_one_initcall+0x103/0x650
[ 73.746863][ T6519] kernel_init_freeable+0x6b1/0x73a
[ 73.752041][ T6519] kernel_init+0x1a/0x1d0
[ 73.756352][ T6519] ret_from_fork+0x1f/0x30
[ 73.760747][ T6519]
[ 73.763067][ T6519] Memory state around the buggy address:
[ 73.768853][ T6519] ffff88807c774400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 73.776894][ T6519] ffff88807c774480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 73.784930][ T6519] >ffff88807c774500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 73.793049][ T6519] ^
[ 73.799173][ T6519] ffff88807c774580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 73.807207][ T6519] ffff88807c774600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 73.815248][ T6519] ==================================================================
[ 73.823707][ T6519] Kernel panic - not syncing: panic_on_warn set ...
[ 73.830397][ T6519] CPU: 1 PID: 6519 Comm: syz-executor Tainted: G B 5.16.0-rc3-next-20211201-syzkaller #0
[ 73.841504][ T6519] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 73.851906][ T6519] Call Trace:
[ 73.855182][ T6519]
[ 73.858103][ T6519] dump_stack_lvl+0xcd/0x134
[ 73.862698][ T6519] panic+0x2b0/0x6dd
[ 73.866594][ T6519] ? __warn_printk+0xf3/0xf3
[ 73.871189][ T6519] ? preempt_schedule_common+0x59/0xc0
[ 73.876737][ T6519] ? up_write+0x3ac/0x470
[ 73.881059][ T6519] ? preempt_schedule_thunk+0x16/0x18
[ 73.886433][ T6519] ? trace_hardirqs_on+0x38/0x1c0
[ 73.891469][ T6519] ? trace_hardirqs_on+0x51/0x1c0
[ 73.896501][ T6519] ? up_write+0x3ac/0x470
[ 73.900930][ T6519] ? up_write+0x3ac/0x470
[ 73.905263][ T6519] end_report.cold+0x63/0x6f
[ 73.909917][ T6519] kasan_report.cold+0x71/0xdf
[ 73.914947][ T6519] ? up_write+0x3ac/0x470
[ 73.919287][ T6519] up_write+0x3ac/0x470
[ 73.923441][ T6519] cgroup_setup_root+0x3a6/0xad0
[ 73.928382][ T6519] ? rebind_subsystems+0x10e0/0x10e0
[ 73.933668][ T6519] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80
[ 73.939924][ T6519] cgroup1_get_tree+0xd33/0x1390
[ 73.944863][ T6519] vfs_get_tree+0x89/0x2f0
[ 73.949288][ T6519] path_mount+0x1320/0x1fa0
[ 73.953790][ T6519] ? kmem_cache_free+0xba/0x4a0
[ 73.958645][ T6519] ? finish_automount+0xaf0/0xaf0
[ 73.963688][ T6519] ? putname+0xfe/0x140
[ 73.967844][ T6519] __x64_sys_mount+0x27f/0x300
[ 73.972606][ T6519] ? copy_mnt_ns+0xae0/0xae0
[ 73.977281][ T6519] ? syscall_enter_from_user_mode+0x21/0x70
[ 73.983179][ T6519] do_syscall_64+0x35/0xb0
[ 73.987679][ T6519] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 73.993581][ T6519] RIP: 0033:0x7f07e8f9a01a
[ 73.997988][ T6519] Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
[ 74.017673][ T6519] RSP: 002b:00007ffcf79494a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[ 74.026164][ T6519] RAX: ffffffffffffffda RBX: 00007ffcf7949638 RCX: 00007f07e8f9a01a
[ 74.034475][ T6519] RDX: 00007f07e8ffcfe2 RSI: 00007f07e8ff329a RDI: 00007f07e8ff1d71
[ 74.042437][ T6519] RBP: 00007f07e8ff329a R08: 00007f07e8ff33f7 R09: 0000000000000026
[ 74.050399][ T6519] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcf79494b0
[ 74.058363][ T6519] R13: 00007ffcf7949658 R14: 00007ffcf7949580 R15: 00007f07e8ff33f1
[ 74.066351][ T6519]
[ 74.069676][ T6519] Kernel Offset: disabled
[ 74.074026][ T6519] Rebooting in 86400 seconds..