Warning: Permanently added '[localhost]:6112' (ECDSA) to the list of known hosts.
2021/12/06 11:37:02 fuzzer started
2021/12/06 11:37:02 dialing manager at localhost:35719
2021/12/06 11:37:02 checking machine...
2021/12/06 11:37:02 checking revisions...
syzkaller login: [ 34.968634] kmemleak: Automatic memory scanning thread ended
2021/12/06 11:37:02 testing simple program...
[ 34.999226] cgroup: Unknown subsys name 'net'
[ 35.000138] cgroup: Unknown subsys name 'net_prio'
[ 35.001838] cgroup: Unknown subsys name 'devices'
[ 35.002903] cgroup: Unknown subsys name 'blkio'
[ 35.022705]
[ 35.023144] =========================
[ 35.024049] WARNING: held lock freed!
[ 35.024917] 5.16.0-rc3-next-20211203 #1 Not tainted
[ 35.026157] -------------------------
[ 35.027482] kworker/0:2/49 is freeing memory ffff8880170da400-ffff8880170da5ff, with a lock still held there!
[ 35.030128] ffff8880170da548 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 35.031721] 3 locks held by kworker/0:2/49:
[ 35.032303] #0: ffff8880080a6138 ((wq_completion)cgroup_destroy){+.+.}-{0:0}, at: process_one_work+0x929/0x1710
[ 35.033687] #1: ffff88800b787da8 ((work_completion)(&(&css->destroy_rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x95d/0x1710
[ 35.035320] #2: ffff8880170da548 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 35.036573]
[ 35.036573] stack backtrace:
[ 35.037165] CPU: 0 PID: 49 Comm: kworker/0:2 Not tainted 5.16.0-rc3-next-20211203 #1
[ 35.038210] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 35.039762] Workqueue: cgroup_destroy css_free_rwork_fn
[ 35.040481] Call Trace:
[ 35.040825]
[ 35.041124] dump_stack_lvl+0x8b/0xb3
[ 35.041641] debug_check_no_locks_freed.cold+0xa5/0xb1
[ 35.042349] ? kernfs_put.part.0+0x334/0x540
[ 35.042967] kfree+0xb3/0x5a0
[ 35.043408] ? kmem_cache_free+0xce/0x640
[ 35.043979] kernfs_put.part.0+0x334/0x540
[ 35.044564] kernfs_put+0x42/0x50
[ 35.045037] __kernfs_remove+0x7ce/0xb00
[ 35.045600] ? lock_is_held_type+0xd7/0x130
[ 35.046198] ? kernfs_next_descendant_post+0x2f0/0x2f0
[ 35.046928] ? down_write+0xde/0x150
[ 35.047453] ? down_write_killable_nested+0x180/0x180
[ 35.048161] kernfs_destroy_root+0x89/0xb0
[ 35.048745] css_free_rwork_fn+0xa28/0xf40
[ 35.049318] process_one_work+0xa30/0x1710
[ 35.049890] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 35.050597] ? rwlock_bug.part.0+0x90/0x90
[ 35.051391] ? _raw_spin_lock_irq+0x41/0x50
[ 35.052005] worker_thread+0x62a/0x13e0
[ 35.052548] ? process_one_work+0x1710/0x1710
[ 35.053134] kthread+0x40c/0x500
[ 35.053677] ? set_kthread_struct+0x130/0x130
[ 35.054247] ret_from_fork+0x22/0x30
[ 35.054764]
[ 35.055150] ==================================================================
[ 35.056154] BUG: KASAN: use-after-free in up_write+0x3ac/0x460
[ 35.056885] Read of size 8 at addr ffff8880170da540 by task kworker/0:2/49
[ 35.057905]
[ 35.058100] CPU: 0 PID: 49 Comm: kworker/0:2 Not tainted 5.16.0-rc3-next-20211203 #1
[ 35.059182] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 35.060893] Workqueue: cgroup_destroy css_free_rwork_fn
[ 35.061776] Call Trace:
[ 35.062204]
[ 35.062563] dump_stack_lvl+0x8b/0xb3
[ 35.063146] print_address_description.constprop.0+0x1f/0x180
[ 35.063935] ? up_write+0x3ac/0x460
[ 35.064436] ? up_write+0x3ac/0x460
[ 35.064892] kasan_report.cold+0x7f/0x11b
[ 35.065410] ? up_write+0x3ac/0x460
[ 35.065856] up_write+0x3ac/0x460
[ 35.066269] css_free_rwork_fn+0xa28/0xf40
[ 35.066839] process_one_work+0xa30/0x1710
[ 35.067474] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 35.068125] ? rwlock_bug.part.0+0x90/0x90
[ 35.068634] ? _raw_spin_lock_irq+0x41/0x50
[ 35.069150] worker_thread+0x62a/0x13e0
[ 35.069622] ? process_one_work+0x1710/0x1710
[ 35.070150] kthread+0x40c/0x500
[ 35.070548] ? set_kthread_struct+0x130/0x130
[ 35.071117] ret_from_fork+0x22/0x30
[ 35.071590]
[ 35.071882]
[ 35.072075] Allocated by task 280:
[ 35.072486] kasan_save_stack+0x1e/0x40
[ 35.073032] __kasan_kmalloc+0x81/0xa0
[ 35.073571] kernfs_create_root+0x4c/0x410
[ 35.074141] cgroup_setup_root+0x346/0xb60
[ 35.074744] cgroup1_get_tree+0xc1b/0x1370
[ 35.075449] vfs_get_tree+0x8e/0x2f0
[ 35.076071] path_mount+0x131b/0x1f80
[ 35.076712] __x64_sys_mount+0x27e/0x300
[ 35.077401] do_syscall_64+0x3b/0x90
[ 35.078028] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 35.078922]
[ 35.079172] Freed by task 49:
[ 35.079642] kasan_save_stack+0x1e/0x40
[ 35.080310] kasan_set_track+0x21/0x30
[ 35.080931] kasan_set_free_info+0x20/0x30
[ 35.081632] __kasan_slab_free+0x108/0x170
[ 35.082372] kfree+0xc5/0x5a0
[ 35.082923] kernfs_put.part.0+0x334/0x540
[ 35.083647] kernfs_put+0x42/0x50
[ 35.084222] __kernfs_remove+0x7ce/0xb00
[ 35.084908] kernfs_destroy_root+0x89/0xb0
[ 35.085620] css_free_rwork_fn+0xa28/0xf40
[ 35.086339] process_one_work+0xa30/0x1710
[ 35.087069] worker_thread+0x62a/0x13e0
[ 35.087745] kthread+0x40c/0x500
[ 35.088320] ret_from_fork+0x22/0x30
[ 35.088955]
[ 35.089231] The buggy address belongs to the object at ffff8880170da400
[ 35.089231] which belongs to the cache kmalloc-512 of size 512
[ 35.091328] The buggy address is located 320 bytes inside of
[ 35.091328] 512-byte region [ffff8880170da400, ffff8880170da600)
[ 35.093282] The buggy address belongs to the page:
[ 35.094093] page:00000000fb90318e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x170d8
[ 35.095673] head:00000000fb90318e order:2 compound_mapcount:0 compound_pincount:0
[ 35.096927] flags: 0x100000000010200(slab|head|node=0|zone=1)
[ 35.097922] raw: 0100000000010200 dead000000000100 dead000000000122 ffff888007841c80
[ 35.099249] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
[ 35.100538] page dumped because: kasan: bad access detected
[ 35.101446]
[ 35.101711] Memory state around the buggy address:
[ 35.102506] ffff8880170da400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 35.103699] ffff8880170da480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 35.104864] >ffff8880170da500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 35.106036] ^
[ 35.106931] ffff8880170da580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 35.108114] ffff8880170da600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 35.109290] ==================================================================
[ 35.133434] cgroup: Unknown subsys name 'hugetlb'
[ 35.134479] cgroup: Unknown subsys name 'rlimit'
executing program
executing program
executing program
VM DIAGNOSIS:
11:37:03 Registers:
info registers vcpu 0
RAX=dffffc0000000060 RBX=00000000000003fd RCX=0000000000000000 RDX=00000000000003fd
RSI=ffffffff8236405c RDI=ffffffff87381a60 RBP=ffffffff87381a20 RSP=ffff88800b7875f0
R8 =0000000000000029 R9 =0000000000000020 R10=ffffffff8234ae1b R11=000000000000000a
R12=0000000000000020 R13=fffffbfff0e70397 R14=fffffbfff0e7034e R15=dffffc0000000000
RIP=ffffffff823640b0 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=00007ffd88ef3000 CR3=000000001a482000 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 4157ea3722b25c7c
YMM01=0000000000000000 0000000000000000 0000000000000000 3f847ae147ae147b
YMM02=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM03=0000000000000000 0000000000000000 0000000000000000 3f70a515d1791c92
YMM04=0000000000000000 0000000000000000 00007faf941f1b00 0000000000415710
YMM05=0000000000000000 0000000000000000 0000000000000000 000000c000323248
YMM06=0000000000000000 0000000000000000 0000000000505007 000000c00002efc0
YMM07=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM08=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM09=0000000000000000 0000000000000000 00000000004643c1 0000000000000000
YMM10=0000000000000000 0000000000000000 000000c0003869a0 000000c000154840
YMM11=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM12=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM13=0000000000000000 0000000000000000 000000c000144660 000000c000144630
YMM14=0000000000000000 0000000000000000 000000c0001446c0 000000c000144690
YMM15=0000000000000000 0000000000000000 000000c0000e5080 000000c0001446f0
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=0000555f4b59d230 CR3=000000001a482000 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 3f847ae147ae147b
YMM02=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM03=0000000000000000 0000000000000000 0000000000000000 3f73dc3e5fabc6f8
YMM04=0000000000000000 0000000000000000 0000000000000000 3fc408f2a54006ca
YMM05=0000000000000000 0000000000000000 000000c000084db0 000000c000084c20
YMM06=0000000000000000 0000000000000000 0000000000000000 3fd3333333333333
YMM07=0000000000000000 0000000000000000 0000000000000000 3fd9769424ef61ad
YMM08=0000000000000000 0000000000000000 0000000000000000 3fe1a8fcd9873ae2
YMM09=0000000000000000 0000000000000000 0000000000000000 3fb3ae4d32a03d78
YMM10=0000000000000000 0000000000000000 0000000000000000 3fd08aeee3bdc624
YMM11=0000000000000000 0000000000000000 000000c000084000 000000c00001d5b0
YMM12=0000000000000000 0000000000000000 000000c000084490 000000c000084010
YMM13=0000000000000000 0000000000000000 000000c000084700 000000c000084480
YMM14=0000000000000000 0000000000000000 000000c000084710 000000c0000846f0
YMM15=0000000000000000 0000000000000000 000000c000084140 000000c000084100