Warning: Permanently added '[localhost]:33600' (ECDSA) to the list of known hosts.
2021/12/06 11:31:28 fuzzer started
2021/12/06 11:31:29 dialing manager at localhost:35719
2021/12/06 11:31:29 checking machine...
2021/12/06 11:31:29 checking revisions...
syzkaller login: [ 35.214235] kmemleak: Automatic memory scanning thread ended
2021/12/06 11:31:29 testing simple program...
[ 35.247644] cgroup: Unknown subsys name 'net'
[ 35.249040] cgroup: Unknown subsys name 'net_prio'
[ 35.250625] cgroup: Unknown subsys name 'devices'
[ 35.251696] cgroup: Unknown subsys name 'blkio'
[ 35.267609]
[ 35.267923] =========================
[ 35.268690] WARNING: held lock freed!
[ 35.269313] 5.16.0-rc3-next-20211203 #1 Not tainted
[ 35.270423] -------------------------
[ 35.271236] kworker/1:1/31 is freeing memory ffff88800faab800-ffff88800faab9ff, with a lock still held there!
[ 35.273498] ffff88800faab948 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 35.274926] 3 locks held by kworker/1:1/31:
[ 35.275613] #0: ffff8880080a6138 ((wq_completion)cgroup_destroy){+.+.}-{0:0}, at: process_one_work+0x929/0x1710
[ 35.277276] #1: ffff88800830fda8 ((work_completion)(&(&css->destroy_rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x95d/0x1710
[ 35.279172] #2: ffff88800faab948 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 35.280665]
[ 35.280665] stack backtrace:
[ 35.281378] CPU: 1 PID: 31 Comm: kworker/1:1 Not tainted 5.16.0-rc3-next-20211203 #1
[ 35.282626] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 35.284446] Workqueue: cgroup_destroy css_free_rwork_fn
[ 35.285297] Call Trace:
[ 35.285707] <TASK>
[ 35.286071] dump_stack_lvl+0x8b/0xb3
[ 35.286681] debug_check_no_locks_freed.cold+0xa5/0xb1
[ 35.287528] ? kernfs_put.part.0+0x334/0x540
[ 35.288234] kfree+0xb3/0x5a0
[ 35.288744] ? kmem_cache_free+0xce/0x640
[ 35.289408] kernfs_put.part.0+0x334/0x540
[ 35.290089] kernfs_put+0x42/0x50
[ 35.290641] __kernfs_remove+0x7ce/0xb00
[ 35.291289] ? lock_is_held_type+0xd7/0x130
[ 35.291979] ? kernfs_next_descendant_post+0x2f0/0x2f0
[ 35.292834] ? down_write+0xde/0x150
[ 35.293425] ? down_write_killable_nested+0x180/0x180
[ 35.294252] kernfs_destroy_root+0x89/0xb0
[ 35.294962] css_free_rwork_fn+0xa28/0xf40
[ 35.295654] process_one_work+0xa30/0x1710
[ 35.296353] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 35.297097] ? rwlock_bug.part.0+0x90/0x90
[ 35.297779] ? _raw_spin_lock_irq+0x41/0x50
[ 35.298474] worker_thread+0x62a/0x13e0
[ 35.299120] ? process_one_work+0x1710/0x1710
[ 35.299834] kthread+0x40c/0x500
[ 35.300497] ? set_kthread_struct+0x130/0x130
[ 35.301367] ret_from_fork+0x22/0x30
[ 35.302096] </TASK>
[ 35.302649] ==================================================================
[ 35.304004] BUG: KASAN: use-after-free in up_write+0x3ac/0x460
[ 35.304986] Read of size 8 at addr ffff88800faab940 by task kworker/1:1/31
[ 35.306098]
[ 35.306356] CPU: 1 PID: 31 Comm: kworker/1:1 Not tainted 5.16.0-rc3-next-20211203 #1
[ 35.307597] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 35.309420] Workqueue: cgroup_destroy css_free_rwork_fn
[ 35.310272] Call Trace:
[ 35.310684] <TASK>
[ 35.311038] dump_stack_lvl+0x8b/0xb3
[ 35.311641] print_address_description.constprop.0+0x1f/0x180
[ 35.312582] ? up_write+0x3ac/0x460
[ 35.313154] ? up_write+0x3ac/0x460
[ 35.313716] kasan_report.cold+0x7f/0x11b
[ 35.314363] ? up_write+0x3ac/0x460
[ 35.314926] up_write+0x3ac/0x460
[ 35.315466] css_free_rwork_fn+0xa28/0xf40
[ 35.316126] process_one_work+0xa30/0x1710
[ 35.316806] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 35.317531] ? rwlock_bug.part.0+0x90/0x90
[ 35.318187] ? _raw_spin_lock_irq+0x41/0x50
[ 35.318860] worker_thread+0x62a/0x13e0
[ 35.319486] ? process_one_work+0x1710/0x1710
[ 35.320183] kthread+0x40c/0x500
[ 35.320714] ? set_kthread_struct+0x130/0x130
[ 35.321403] ret_from_fork+0x22/0x30
[ 35.321981] </TASK>
[ 35.322336]
[ 35.322585] Allocated by task 282:
[ 35.323124] kasan_save_stack+0x1e/0x40
[ 35.323734] __kasan_kmalloc+0x81/0xa0
[ 35.324342] kernfs_create_root+0x4c/0x410
[ 35.324991] cgroup_setup_root+0x346/0xb60
[ 35.325642] cgroup1_get_tree+0xc1b/0x1370
[ 35.326295] vfs_get_tree+0x8e/0x2f0
[ 35.326868] path_mount+0x131b/0x1f80
[ 35.327453] __x64_sys_mount+0x27e/0x300
[ 35.328077] do_syscall_64+0x3b/0x90
[ 35.328656] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 35.329447]
[ 35.329697] Freed by task 31:
[ 35.330170] kasan_save_stack+0x1e/0x40
[ 35.330779] kasan_set_track+0x21/0x30
[ 35.331375] kasan_set_free_info+0x20/0x30
[ 35.332024] __kasan_slab_free+0x108/0x170
[ 35.332681] kfree+0xc5/0x5a0
[ 35.333155] kernfs_put.part.0+0x334/0x540
[ 35.333806] kernfs_put+0x42/0x50
[ 35.334330] __kernfs_remove+0x7ce/0xb00
[ 35.334944] kernfs_destroy_root+0x89/0xb0
[ 35.335586] css_free_rwork_fn+0xa28/0xf40
[ 35.336229] process_one_work+0xa30/0x1710
[ 35.336884] worker_thread+0x62a/0x13e0
[ 35.337494] kthread+0x40c/0x500
[ 35.338008] ret_from_fork+0x22/0x30
[ 35.338572]
[ 35.338818] The buggy address belongs to the object at ffff88800faab800
[ 35.338818] which belongs to the cache kmalloc-512 of size 512
[ 35.340704] The buggy address is located 320 bytes inside of
[ 35.340704] 512-byte region [ffff88800faab800, ffff88800faaba00)
[ 35.342465] The buggy address belongs to the page:
[ 35.343198] page:00000000774a2c8c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfaa8
[ 35.344601] head:00000000774a2c8c order:2 compound_mapcount:0 compound_pincount:0
[ 35.345727] flags: 0x100000000010200(slab|head|node=0|zone=1)
[ 35.346612] raw: 0100000000010200 0000000000000000 dead000000000122 ffff888007841c80
[ 35.347778] raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
[ 35.348946] page dumped because: kasan: bad access detected
[ 35.349787]
[ 35.350034] Memory state around the buggy address:
[ 35.350765] ffff88800faab800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 35.351853] ffff88800faab880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 35.352947] >ffff88800faab900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 35.354032] ^
[ 35.354841] ffff88800faab980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 35.355926] ffff88800faaba00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 35.357017] ==================================================================
[ 35.386320] cgroup: Unknown subsys name 'hugetlb'
[ 35.387335] cgroup: Unknown subsys name 'rlimit'
executing program
executing program
executing program
VM DIAGNOSIS:
11:31:29 Registers:
info registers vcpu 0
RAX=ffffffff84078af0 RBX=ffffffff85032600 RCX=ffffffff8405abe1 RDX=ffffed100d9c7143
RSI=0000000000000001 RDI=ffffffff84078eaf RBP=0000000000000000 RSP=ffffffff85007e40
R8 =0000000000000000 R9 =ffff88806ce38a13 R10=ffffed100d9c7142 R11=0000000000000001
R12=fffffbfff0a064c0 R13=ffffffff858bd8d0 R14=0000000000000000 R15=dffffc0000000000
RIP=ffffffff84078afb RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1
ES =0000 0000000000000000 00000000 00000000
CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA]
SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA]
DS =0000 0000000000000000 00000000 00000000
FS =0000 0000000000000000 00000000 00000000
GS =0000 ffff88806ce00000 00000000 00000000
LDT=0000 fffffe0000000000 00000000 00000000
TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy
GDT= fffffe0000001000 0000007f
IDT= fffffe0000000000 00000fff
CR0=80050033 CR2=00007f51712f92d0 CR3=000000000cd24000 CR4=00350ef0
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
EFER=0000000000000d01
FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001fa0
FPR0=0000000000000000 0000 FPR1=0000000000000000 0000
FPR2=0000000000000000 0000 FPR3=0000000000000000 0000
FPR4=0000000000000000 0000 FPR5=0000000000000000 0000
FPR6=0000000000000000 0000 FPR7=0000000000000000 0000
YMM00=0000000000000000 0000000000000000 0000000000000000 41416cf1c70401af
YMM01=0000000000000000 0000000000000000 0000000000000000 3f847ae147ae147b
YMM02=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM03=0000000000000000 0000000000000000 0000000000000000 3f70f35e69b162de
YMM04=0000000000000000 0000000000000000 00007fa82b5e7200 0000000000415710
YMM05=0000000000000000 0000000000000000 0000000000b12758 000000c00037f6c0
YMM06=0000000000000000 0000000000000000 0000000000505007 000000c00002efc0
YMM07=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM08=0000000000000000 0000000000000000 00000000004643c6 0000000000000000
YMM09=0000000000000000 0000000000000000 00000000004643c1 0000000000000000
YMM10=0000000000000000 0000000000000000 000000c00009c460 000000c000156b00
YMM11=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM12=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM13=0000000000000000 0000000000000000 000000c0000aeb00 000000c0000aeac0
YMM14=0000000000000000 0000000000000000 000000c000294db0 000000c000294d50
YMM15=0000000000000000 0000000000000000 000000c0000b0420 000000c000294d80
info registers vcpu 1
RAX=0000000000000020 RBX=00000000000003f8 RCX=0000000000000000 RDX=00000000000003f8
RSI=ffffffff823640e1 RDI=ffffffff87381a60 RBP=ffffffff87381a20 RSP=ffff88800830f648
R8 =0000000000000000 R9 =0000000000000020 R10=ffffffff82365d23 R11=000000000000000a
R12=0000000000000020 R13=0000000000000020 R14=ffffffff87381a20 R15=dffffc0000000000
RIP=ffffffff82364138 RFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0000 0000000000000000 00000000 00000000
CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA]
SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA]
DS =0000 0000000000000000 00000000 00000000
FS =0000 0000000000000000 00000000 00000000
GS =0000 ffff88806cf00000 00000000 00000000
LDT=0000 fffffe0000000000 00000000 00000000
TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy
GDT= fffffe0000048000 0000007f
IDT= fffffe0000000000 00000fff
CR0=80050033 CR2=00007ffe1ebd9ff8 CR3=000000000cd24000 CR4=00350ee0
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
EFER=0000000000000d01
FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001fa0
FPR0=0000000000000000 0000 FPR1=0000000000000000 0000
FPR2=0000000000000000 0000 FPR3=0000000000000000 0000
FPR4=0000000000000000 0000 FPR5=0000000000000000 0000
FPR6=0000000000000000 0000 FPR7=0000000000000000 0000
YMM00=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM01=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM02=0000000000000000 0000000000000000 0000000000000000 bfe62e42fefa39ef
YMM03=0000000000000000 0000000000000000 0000ff0000000000 0000000000000000
YMM04=0000000000000000 0000000000000000 732f6c61636f6c2f 7273752f3d485441
YMM05=0000000000000000 0000000000000000 622f6c61636f6c2f 7273752f3a6e6962
YMM06=0000000000000000 0000000000000000 73752f3a6e696273 2f7273752f3a6e69
YMM07=0000000000000000 0000000000000000 6e69622f3a6e6962 732f3a6e69622f72
YMM08=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM09=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM10=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM11=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM12=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM13=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM14=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM15=0000000000000000 0000000000000000 0000000000000000 0000000000000000