Warning: Permanently added '10.128.0.13' (ECDSA) to the list of known hosts.
2021/12/02 07:08:02 fuzzer started
2021/12/02 07:08:02 connecting to host at 10.128.0.169:34125
2021/12/02 07:08:02 checking machine...
2021/12/02 07:08:02 checking revisions...
2021/12/02 07:08:02 testing simple program...
syzkaller login: [ 72.929279][ T6532] cgroup: Unknown subsys name 'net'
[ 72.936911][ T6532]
[ 72.939250][ T6532] =========================
[ 72.944198][ T6532] WARNING: held lock freed!
[ 72.948875][ T6532] 5.16.0-rc3-next-20211202-syzkaller #0 Not tainted
[ 72.955465][ T6532] -------------------------
[ 72.959944][ T6532] syz-executor/6532 is freeing memory ffff888018b99000-ffff888018b991ff, with a lock still held there!
[ 72.971030][ T6532] ffff888018b99148 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_destroy_root+0x81/0xb0
[ 72.980844][ T6532] 2 locks held by syz-executor/6532:
[ 72.986138][ T6532] #0: ffffffff8bbc4e48 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_lock_and_drain_offline+0xa5/0x900
[ 72.996679][ T6532] #1: ffff888018b99148 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_destroy_root+0x81/0xb0
[ 73.007027][ T6532]
[ 73.007027][ T6532] stack backtrace:
[ 73.012988][ T6532] CPU: 0 PID: 6532 Comm: syz-executor Not tainted 5.16.0-rc3-next-20211202-syzkaller #0
[ 73.022810][ T6532] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 73.033382][ T6532] Call Trace:
[ 73.036658][ T6532]
[ 73.039927][ T6532] dump_stack_lvl+0xcd/0x134
[ 73.044611][ T6532] debug_check_no_locks_freed.cold+0x9d/0xa9
[ 73.050587][ T6532] ? lockdep_hardirqs_on+0x79/0x100
[ 73.056053][ T6532] slab_free_freelist_hook+0x73/0x1c0
[ 73.061593][ T6532] ? kernfs_put.part.0+0x331/0x540
[ 73.066790][ T6532] kfree+0xe0/0x430
[ 73.070676][ T6532] ? kmem_cache_free+0xba/0x4a0
[ 73.075691][ T6532] ? rwlock_bug.part.0+0x90/0x90
[ 73.080821][ T6532] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70
[ 73.087183][ T6532] kernfs_put.part.0+0x331/0x540
[ 73.092310][ T6532] kernfs_put+0x42/0x50
[ 73.096665][ T6532] __kernfs_remove+0x7a3/0xb20
[ 73.101788][ T6532] ? kernfs_next_descendant_post+0x2f0/0x2f0
[ 73.107852][ T6532] ? down_write+0xde/0x150
[ 73.112349][ T6532] ? down_write_killable_nested+0x180/0x180
[ 73.118326][ T6532] kernfs_destroy_root+0x89/0xb0
[ 73.123433][ T6532] cgroup_setup_root+0x3a6/0xad0
[ 73.128431][ T6532] ? rebind_subsystems+0x10e0/0x10e0
[ 73.133713][ T6532] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80
[ 73.139949][ T6532] cgroup1_get_tree+0xd33/0x1390
[ 73.144928][ T6532] vfs_get_tree+0x89/0x2f0
[ 73.149352][ T6532] path_mount+0x1320/0x1fa0
[ 73.153956][ T6532] ? kmem_cache_free+0xba/0x4a0
[ 73.158973][ T6532] ? finish_automount+0xaf0/0xaf0
[ 73.163990][ T6532] ? putname+0xfe/0x140
[ 73.168140][ T6532] __x64_sys_mount+0x27f/0x300
[ 73.172910][ T6532] ? copy_mnt_ns+0xae0/0xae0
[ 73.177501][ T6532] ? syscall_enter_from_user_mode+0x21/0x70
[ 73.183516][ T6532] do_syscall_64+0x35/0xb0
[ 73.188116][ T6532] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 73.194196][ T6532] RIP: 0033:0x7f884fe2201a
[ 73.198781][ T6532] 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
[ 73.219393][ T6532] RSP: 002b:00007ffcbc8f72b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[ 73.227813][ T6532] RAX: ffffffffffffffda RBX: 00007ffcbc8f7448 RCX: 00007f884fe2201a
[ 73.235864][ T6532] RDX: 00007f884fe84fe2 RSI: 00007f884fe7b29a RDI: 00007f884fe79d71
[ 73.243925][ T6532] RBP: 00007f884fe7b29a R08: 00007f884fe7b3f7 R09: 0000000000000026
[ 73.251982][ T6532] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcbc8f72c0
[ 73.260042][ T6532] R13: 00007ffcbc8f7468 R14: 00007ffcbc8f7390 R15: 00007f884fe7b3f1
[ 73.268007][ T6532]
[ 73.272070][ T6532] ==================================================================
[ 73.272080][ T6532] BUG: KASAN: use-after-free in up_write+0x3ac/0x470
[ 73.272109][ T6532] Read of size 8 at addr ffff888018b99140 by task syz-executor/6532
[ 73.272130][ T6532]
[ 73.272137][ T6532] CPU: 0 PID: 6532 Comm: syz-executor Not tainted 5.16.0-rc3-next-20211202-syzkaller #0
[ 73.272159][ T6532] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 73.272171][ T6532] Call Trace:
[ 73.272178][ T6532]
[ 73.272185][ T6532] dump_stack_lvl+0xcd/0x134
[ 73.272215][ T6532] print_address_description.constprop.0.cold+0xa5/0x3ed
[ 73.272245][ T6532] ? up_write+0x3ac/0x470
[ 73.272264][ T6532] ? up_write+0x3ac/0x470
[ 73.272285][ T6532] kasan_report.cold+0x83/0xdf
[ 73.272309][ T6532] ? up_write+0x3ac/0x470
[ 73.272330][ T6532] up_write+0x3ac/0x470
[ 73.272353][ T6532] cgroup_setup_root+0x3a6/0xad0
[ 73.272382][ T6532] ? rebind_subsystems+0x10e0/0x10e0
[ 73.272412][ T6532] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80
[ 73.272442][ T6532] cgroup1_get_tree+0xd33/0x1390
[ 73.272470][ T6532] vfs_get_tree+0x89/0x2f0
[ 73.272498][ T6532] path_mount+0x1320/0x1fa0
[ 73.272525][ T6532] ? kmem_cache_free+0xba/0x4a0
[ 73.272554][ T6532] ? finish_automount+0xaf0/0xaf0
[ 73.272581][ T6532] ? putname+0xfe/0x140
[ 73.272608][ T6532] __x64_sys_mount+0x27f/0x300
[ 73.272633][ T6532] ? copy_mnt_ns+0xae0/0xae0
[ 73.272666][ T6532] ? syscall_enter_from_user_mode+0x21/0x70
[ 73.272699][ T6532] do_syscall_64+0x35/0xb0
[ 73.272723][ T6532] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 73.272748][ T6532] RIP: 0033:0x7f884fe2201a
[ 73.272767][ T6532] 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
[ 73.272788][ T6532] RSP: 002b:00007ffcbc8f72b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[ 73.272810][ T6532] RAX: ffffffffffffffda RBX: 00007ffcbc8f7448 RCX: 00007f884fe2201a
[ 73.272826][ T6532] RDX: 00007f884fe84fe2 RSI: 00007f884fe7b29a RDI: 00007f884fe79d71
[ 73.272842][ T6532] RBP: 00007f884fe7b29a R08: 00007f884fe7b3f7 R09: 0000000000000026
[ 73.272856][ T6532] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcbc8f72c0
[ 73.272870][ T6532] R13: 00007ffcbc8f7468 R14: 00007ffcbc8f7390 R15: 00007f884fe7b3f1
[ 73.272892][ T6532]
[ 73.272899][ T6532]
[ 73.272902][ T6532] Allocated by task 6532:
[ 73.272912][ T6532] kasan_save_stack+0x1e/0x50
[ 73.272937][ T6532] __kasan_kmalloc+0xa9/0xd0
[ 73.272961][ T6532] kernfs_create_root+0x4c/0x410
[ 73.272985][ T6532] cgroup_setup_root+0x243/0xad0
[ 73.273011][ T6532] cgroup1_get_tree+0xd33/0x1390
[ 73.273032][ T6532] vfs_get_tree+0x89/0x2f0
[ 73.273055][ T6532] path_mount+0x1320/0x1fa0
[ 73.273077][ T6532] __x64_sys_mount+0x27f/0x300
[ 73.273100][ T6532] do_syscall_64+0x35/0xb0
[ 73.273121][ T6532] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 73.273142][ T6532]
[ 73.273145][ T6532] Freed by task 6532:
[ 73.273154][ T6532] kasan_save_stack+0x1e/0x50
[ 73.273177][ T6532] kasan_set_track+0x21/0x30
[ 73.273201][ T6532] kasan_set_free_info+0x20/0x30
[ 73.273220][ T6532] __kasan_slab_free+0x103/0x170
[ 73.273244][ T6532] slab_free_freelist_hook+0x8b/0x1c0
[ 73.273268][ T6532] kfree+0xe0/0x430
[ 73.273288][ T6532] kernfs_put.part.0+0x331/0x540
[ 73.273311][ T6532] kernfs_put+0x42/0x50
[ 73.273332][ T6532] __kernfs_remove+0x7a3/0xb20
[ 73.273354][ T6532] kernfs_destroy_root+0x89/0xb0
[ 73.273377][ T6532] cgroup_setup_root+0x3a6/0xad0
[ 73.273402][ T6532] cgroup1_get_tree+0xd33/0x1390
[ 73.273423][ T6532] vfs_get_tree+0x89/0x2f0
[ 73.273445][ T6532] path_mount+0x1320/0x1fa0
[ 73.273463][ T6532] __x64_sys_mount+0x27f/0x300
[ 73.273487][ T6532] do_syscall_64+0x35/0xb0
[ 73.273508][ T6532] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 73.273530][ T6532]
[ 73.273533][ T6532] The buggy address belongs to the object at ffff888018b99000
[ 73.273533][ T6532] which belongs to the cache kmalloc-512 of size 512
[ 73.273549][ T6532] The buggy address is located 320 bytes inside of
[ 73.273549][ T6532] 512-byte region [ffff888018b99000, ffff888018b99200)
[ 73.273568][ T6532] The buggy address belongs to the page:
[ 73.273573][ T6532] page:ffffea000062e600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18b98
[ 73.273593][ T6532] head:ffffea000062e600 order:2 compound_mapcount:0 compound_pincount:0
[ 73.273609][ T6532] flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
[ 73.273641][ T6532] raw: 00fff00000010200 ffffea00008a5c00 dead000000000002 ffff888010c41c80
[ 73.273667][ T6532] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
[ 73.273678][ T6532] page dumped because: kasan: bad access detected
[ 73.273687][ T6532] page_owner tracks the page as allocated
[ 73.273693][ T6532] page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 369, ts 7834406459, free_ts 0
[ 73.273726][ T6532] get_page_from_freelist+0xa72/0x2f40
[ 73.273748][ T6532] __alloc_pages+0x1b2/0x500
[ 73.273767][ T6532] alloc_pages+0x1a7/0x300
[ 73.273807][ T6532] new_slab+0x261/0x460
[ 73.273828][ T6532] ___slab_alloc+0x798/0xf30
[ 73.273850][ T6532] __slab_alloc.constprop.0+0x4d/0xa0
[ 73.273874][ T6532] kmem_cache_alloc_trace+0x289/0x2c0
[ 73.273899][ T6532] alloc_bprm+0x51/0x8f0
[ 73.273918][ T6532] kernel_execve+0x55/0x460
[ 73.273938][ T6532] call_usermodehelper_exec_async+0x2e3/0x580
[ 73.273965][ T6532] ret_from_fork+0x1f/0x30
[ 73.273987][ T6532] page_owner free stack trace missing
[ 73.273992][ T6532]
[ 73.273995][ T6532] Memory state around the buggy address:
[ 73.274003][ T6532] ffff888018b99000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 73.274015][ T6532] ffff888018b99080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 73.274042][ T6532] >ffff888018b99100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 73.274051][ T6532] ^
[ 73.274059][ T6532] ffff888018b99180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 73.274072][ T6532] ffff888018b99200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 73.274081][ T6532] ==================================================================
[ 73.274140][ T6532] Kernel panic - not syncing: panic_on_warn set ...
[ 73.274151][ T6532] CPU: 0 PID: 6532 Comm: syz-executor Tainted: G B 5.16.0-rc3-next-20211202-syzkaller #0
[ 73.274178][ T6532] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 73.274188][ T6532] Call Trace:
[ 73.274194][ T6532]
[ 73.274202][ T6532] dump_stack_lvl+0xcd/0x134
[ 73.274228][ T6532] panic+0x2b0/0x6dd
[ 73.274249][ T6532] ? __warn_printk+0xf3/0xf3
[ 73.274272][ T6532] ? preempt_schedule_common+0x59/0xc0
[ 73.274295][ T6532] ? up_write+0x3ac/0x470
[ 73.274313][ T6532] ? preempt_schedule_thunk+0x16/0x18
[ 73.274338][ T6532] ? trace_hardirqs_on+0x38/0x1c0
[ 73.274357][ T6532] ? trace_hardirqs_on+0x51/0x1c0
[ 73.274379][ T6532] ? up_write+0x3ac/0x470
[ 73.274399][ T6532] ? up_write+0x3ac/0x470
[ 73.274419][ T6532] end_report.cold+0x63/0x6f
[ 73.274442][ T6532] kasan_report.cold+0x71/0xdf
[ 73.274465][ T6532] ? up_write+0x3ac/0x470
[ 73.274487][ T6532] up_write+0x3ac/0x470
[ 73.274509][ T6532] cgroup_setup_root+0x3a6/0xad0
[ 73.274537][ T6532] ? rebind_subsystems+0x10e0/0x10e0
[ 73.274566][ T6532] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80
[ 73.274598][ T6532] cgroup1_get_tree+0xd33/0x1390
[ 73.274624][ T6532] vfs_get_tree+0x89/0x2f0
[ 73.274742][ T6532] path_mount+0x1320/0x1fa0
[ 73.274778][ T6532] ? kmem_cache_free+0xba/0x4a0
[ 73.274805][ T6532] ? finish_automount+0xaf0/0xaf0
[ 73.274828][ T6532] ? putname+0xfe/0x140
[ 73.274851][ T6532] __x64_sys_mount+0x27f/0x300
[ 73.274876][ T6532] ? copy_mnt_ns+0xae0/0xae0
[ 73.274900][ T6532] ? syscall_enter_from_user_mode+0x21/0x70
[ 73.274930][ T6532] do_syscall_64+0x35/0xb0
[ 73.274952][ T6532] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 73.274976][ T6532] RIP: 0033:0x7f884fe2201a
[ 73.274998][ T6532] 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
[ 73.275023][ T6532] RSP: 002b:00007ffcbc8f72b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[ 73.275129][ T6532] RAX: ffffffffffffffda RBX: 00007ffcbc8f7448 RCX: 00007f884fe2201a
[ 73.275143][ T6532] RDX: 00007f884fe84fe2 RSI: 00007f884fe7b29a RDI: 00007f884fe79d71
[ 73.275157][ T6532] RBP: 00007f884fe7b29a R08: 00007f884fe7b3f7 R09: 0000000000000026
[ 73.275172][ T6532] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcbc8f72c0
[ 73.275186][ T6532] R13: 00007ffcbc8f7468 R14: 00007ffcbc8f7390 R15: 00007f884fe7b3f1
[ 73.275207][ T6532]
[ 73.275517][ T6532] Kernel Offset: disabled
[ 74.137714][ T6532] Rebooting in 86400 seconds..