Warning: Permanently added '[localhost]:21175' (ECDSA) to the list of known hosts.
2021/12/06 11:34:41 fuzzer started
2021/12/06 11:34:41 dialing manager at localhost:35719
2021/12/06 11:34:41 checking machine...
2021/12/06 11:34:41 checking revisions...
syzkaller login: [ 32.784353] kmemleak: Automatic memory scanning thread ended
2021/12/06 11:34:41 testing simple program...
[ 32.813949] cgroup: Unknown subsys name 'net'
[ 32.814849] cgroup: Unknown subsys name 'net_prio'
[ 32.817304] cgroup: Unknown subsys name 'devices'
[ 32.818250] cgroup: Unknown subsys name 'blkio'
[ 32.835627]
[ 32.836018] =========================
[ 32.836822] WARNING: held lock freed!
[ 32.837628] 5.16.0-rc3-next-20211203 #1 Not tainted
[ 32.838858] -------------------------
[ 32.840202] kworker/0:2/82 is freeing memory ffff888018177c00-ffff888018177dff, with a lock still held there!
[ 32.842524] ffff888018177d48 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 32.844418] 3 locks held by kworker/0:2/82:
[ 32.845341] #0: ffff8880080a6138 ((wq_completion)cgroup_destroy){+.+.}-{0:0}, at: process_one_work+0x929/0x1710
[ 32.847554] #1: ffff88800fa6fda8 ((work_completion)(&(&css->destroy_rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x95d/0x1710
[ 32.850096] #2: ffff888018177d48 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 32.852082]
[ 32.852082] stack backtrace:
[ 32.853035] CPU: 0 PID: 82 Comm: kworker/0:2 Not tainted 5.16.0-rc3-next-20211203 #1
[ 32.854697] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 32.857130] Workqueue: cgroup_destroy css_free_rwork_fn
[ 32.858276] Call Trace:
[ 32.858824]
[ 32.859309] dump_stack_lvl+0x8b/0xb3
[ 32.860119] debug_check_no_locks_freed.cold+0xa5/0xb1
[ 32.861245] ? kernfs_put.part.0+0x334/0x540
[ 32.862162] kfree+0xb3/0x5a0
[ 32.862811] ? kmem_cache_free+0xce/0x640
[ 32.863677] kernfs_put.part.0+0x334/0x540
[ 32.864569] kernfs_put+0x42/0x50
[ 32.865286] __kernfs_remove+0x7ce/0xb00
[ 32.866132] ? lock_is_held_type+0xd7/0x130
[ 32.867024] ? kernfs_next_descendant_post+0x2f0/0x2f0
[ 32.868109] ? down_write+0xde/0x150
[ 32.868880] ? down_write_killable_nested+0x180/0x180
[ 32.869964] kernfs_destroy_root+0x89/0xb0
[ 32.870837] css_free_rwork_fn+0xa28/0xf40
[ 32.871719] process_one_work+0xa30/0x1710
[ 32.872604] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 32.873582] ? rwlock_bug.part.0+0x90/0x90
[ 32.874465] ? _raw_spin_lock_irq+0x41/0x50
[ 32.875364] worker_thread+0x62a/0x13e0
[ 32.876209] ? process_one_work+0x1710/0x1710
[ 32.877142] kthread+0x40c/0x500
[ 32.877846] ? set_kthread_struct+0x130/0x130
[ 32.878930] ret_from_fork+0x22/0x30
[ 32.879726]
[ 32.880312] ==================================================================
[ 32.881871] BUG: KASAN: use-after-free in up_write+0x3ac/0x460
[ 32.883133] Read of size 8 at addr ffff888018177d40 by task kworker/0:2/82
[ 32.884594]
[ 32.884934] CPU: 0 PID: 82 Comm: kworker/0:2 Not tainted 5.16.0-rc3-next-20211203 #1
[ 32.886591] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 32.888932] Workqueue: cgroup_destroy css_free_rwork_fn
[ 32.890064] Call Trace:
[ 32.890600]
[ 32.891071] dump_stack_lvl+0x8b/0xb3
[ 32.891873] print_address_description.constprop.0+0x1f/0x180
[ 32.893101] ? up_write+0x3ac/0x460
[ 32.893857] ? up_write+0x3ac/0x460
[ 32.894613] kasan_report.cold+0x7f/0x11b
[ 32.895498] ? up_write+0x3ac/0x460
[ 32.896278] up_write+0x3ac/0x460
[ 32.897033] css_free_rwork_fn+0xa28/0xf40
[ 32.897955] process_one_work+0xa30/0x1710
[ 32.898853] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 32.899830] ? rwlock_bug.part.0+0x90/0x90
[ 32.900706] ? _raw_spin_lock_irq+0x41/0x50
[ 32.901632] worker_thread+0x62a/0x13e0
[ 32.902478] ? process_one_work+0x1710/0x1710
[ 32.903409] kthread+0x40c/0x500
[ 32.904126] ? set_kthread_struct+0x130/0x130
[ 32.905069] ret_from_fork+0x22/0x30
[ 32.905843]
[ 32.906315]
[ 32.906650] Allocated by task 280:
[ 32.907378] kasan_save_stack+0x1e/0x40
[ 32.908197] __kasan_kmalloc+0x81/0xa0
[ 32.909033] kernfs_create_root+0x4c/0x410
[ 32.909915] cgroup_setup_root+0x346/0xb60
[ 32.910794] cgroup1_get_tree+0xc1b/0x1370
[ 32.911674] vfs_get_tree+0x8e/0x2f0
[ 32.912448] path_mount+0x131b/0x1f80
[ 32.913239] __x64_sys_mount+0x27e/0x300
[ 32.914075] do_syscall_64+0x3b/0x90
[ 32.914839] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 32.915894]
[ 32.916228] Freed by task 82:
[ 32.916861] kasan_save_stack+0x1e/0x40
[ 32.917690] kasan_set_track+0x21/0x30
[ 32.918492] kasan_set_free_info+0x20/0x30
[ 32.919366] __kasan_slab_free+0x108/0x170
[ 32.920241] kfree+0xc5/0x5a0
[ 32.920880] kernfs_put.part.0+0x334/0x540
[ 32.921757] kernfs_put+0x42/0x50
[ 32.922460] __kernfs_remove+0x7ce/0xb00
[ 32.923288] kernfs_destroy_root+0x89/0xb0
[ 32.924150] css_free_rwork_fn+0xa28/0xf40
[ 32.925037] process_one_work+0xa30/0x1710
[ 32.925903] worker_thread+0x62a/0x13e0
[ 32.926717] kthread+0x40c/0x500
[ 32.927406] ret_from_fork+0x22/0x30
[ 32.928169]
[ 32.928501] The buggy address belongs to the object at ffff888018177c00
[ 32.928501] which belongs to the cache kmalloc-512 of size 512
[ 32.931026] The buggy address is located 320 bytes inside of
[ 32.931026] 512-byte region [ffff888018177c00, ffff888018177e00)
[ 32.933377] The buggy address belongs to the page:
[ 32.934353] page:0000000004a6debf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18174
[ 32.936223] head:0000000004a6debf order:2 compound_mapcount:0 compound_pincount:0
[ 32.937746] flags: 0x100000000010200(slab|head|node=0|zone=1)
[ 32.938937] raw: 0100000000010200 0000000000000000 dead000000000122 ffff888007841c80
[ 32.940493] raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
[ 32.942046] page dumped because: kasan: bad access detected
[ 32.943171]
[ 32.943505] Memory state around the buggy address:
[ 32.944493] ffff888018177c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 32.945948] ffff888018177c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 32.947390] >ffff888018177d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 32.948831] ^
[ 32.949908] ffff888018177d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 32.951363] ffff888018177e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 32.952798] ==================================================================
[ 32.999889] cgroup: Unknown subsys name 'hugetlb'
[ 33.001204] cgroup: Unknown subsys name 'rlimit'
executing program
executing program
executing program
VM DIAGNOSIS:
11:34:42 Registers:
info registers vcpu 0
RAX=0000000000000038 RBX=00000000000003f8 RCX=0000000000000000 RDX=00000000000003f8
RSI=ffffffff823640e1 RDI=ffffffff87381a60 RBP=ffffffff87381a20 RSP=ffff88800fa6f648
R8 =0000000000000000 R9 =0000000000000038 R10=ffffffff82365d23 R11=000000000000000a
R12=0000000000000038 R13=0000000000000038 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 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=00007f8e74a7bda0 CR3=000000001d004000 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 0000000000000000
YMM01=0000000000000000 0000000000000000 0000000000000000 3f847ae147ae147b
YMM02=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM03=0000000000000000 0000000000000000 0000000000000000 3f70b0577a6bd8d2
YMM04=0000000000000000 0000000000000000 6620296f692b202c 6c6f72746e6f635f
YMM05=0000000000000000 0000000000000000 28746e756f6d0a32 32203a64656c6961
YMM06=0000000000000000 0000000000000000 202c74656e2f7075 6f7267637a79732f
YMM07=0000000000000000 0000000000000000 0a3232203a64656c 696166202974656e
YMM08=0000000000000000 0000000000000000 0000000000b119f0 0000000000000000
YMM09=0000000000000000 0000000000000000 00000000004643c1 0000000000000000
YMM10=0000000000000000 0000000000000000 000000c000368b40 000000c000156b00
YMM11=0000000000000000 0000000000000000 ca4bfd0d8c01e777 00756ea180aa0dab
YMM12=0000000000000000 0000000000000000 000000c00031a880 7e3b596800000000
YMM13=0000000000000000 0000000000000000 000000c0002946f0 000000c000080050
YMM14=0000000000000000 0000000000000000 000000c000294ba0 000000c000086150
YMM15=0000000000000000 0000000000000000 000000c0000ae900 000000c000294bd0
info registers vcpu 1
RAX=ffffffff84078af0 RBX=ffff8880081a9ac0 RCX=ffffffff8405abe1 RDX=ffffed100d9e7143
RSI=0000000000000001 RDI=ffffffff84078eaf RBP=0000000000000001 RSP=ffff888008207e78
R8 =0000000000000000 R9 =ffff88806cf38a13 R10=ffffed100d9e7142 R11=0000000000000001
R12=ffffed1001035358 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 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=00007f8e74add000 CR3=000000001d004000 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 41421c45a15a2a33
YMM01=0000000000000000 0000000000000000 0000000000000000 3f847ae147ae147b
YMM02=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM03=0000000000000000 0000000000000000 0000000000000000 3f7387e40e5fbea4
YMM04=0000000000000000 0000000000000000 6620296f692b202c 6c6f72746e6f635f
YMM05=0000000000000000 0000000000000000 28746e756f6d0a32 32203a64656c6961
YMM06=0000000000000000 0000000000000000 202c74656e2f7075 6f7267637a79732f
YMM07=0000000000000000 0000000000000000 0a3232203a64656c 696166202974656e
YMM08=0000000000000000 0000000000000000 0000000000b119f0 0000000000000000
YMM09=0000000000000000 0000000000000000 00000000004643c1 0000000000000000
YMM10=0000000000000000 0000000000000000 000000c000368b40 000000c000156b00
YMM11=0000000000000000 0000000000000000 ca4bfd0d8c01e777 00756ea180aa0dab
YMM12=0000000000000000 0000000000000000 000000c00031a880 7e3b596800000000
YMM13=0000000000000000 0000000000000000 000000c0002946f0 000000c000080050
YMM14=0000000000000000 0000000000000000 000000c000294ba0 000000c000086150
YMM15=0000000000000000 0000000000000000 000000c0000ae900 000000c000294bd0