Warning: Permanently added '[localhost]:31428' (ECDSA) to the list of known hosts.
2021/12/06 11:38:35 fuzzer started
2021/12/06 11:38:36 dialing manager at localhost:35719
2021/12/06 11:38:36 checking machine...
2021/12/06 11:38:36 checking revisions...
syzkaller login: [ 34.925180] kmemleak: Automatic memory scanning thread ended
2021/12/06 11:38:36 testing simple program...
[ 34.965072] cgroup: Unknown subsys name 'net'
[ 34.966398] cgroup: Unknown subsys name 'net_prio'
[ 34.968826] cgroup: Unknown subsys name 'devices'
[ 34.970594] cgroup: Unknown subsys name 'blkio'
[ 34.998091]
[ 34.998462] =========================
[ 34.999200] WARNING: held lock freed!
[ 34.999938] 5.16.0-rc3-next-20211203 #1 Not tainted
[ 35.001134] -------------------------
[ 35.002403] kworker/0:2/48 is freeing memory ffff88800e643400-ffff88800e6435ff, with a lock still held there!
[ 35.004623] ffff88800e643548 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 35.006356] 3 locks held by kworker/0:2/48:
[ 35.007193] #0: ffff8880080a6138 ((wq_completion)cgroup_destroy){+.+.}-{0:0}, at: process_one_work+0x929/0x1710
[ 35.009162] #1: ffff88800ef6fda8 ((work_completion)(&(&css->destroy_rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x95d/0x1710
[ 35.011470] #2: ffff88800e643548 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 35.013276]
[ 35.013276] stack backtrace:
[ 35.014130] CPU: 0 PID: 48 Comm: kworker/0:2 Not tainted 5.16.0-rc3-next-20211203 #1
[ 35.015667] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 35.017853] Workqueue: cgroup_destroy css_free_rwork_fn
[ 35.018940] Call Trace:
[ 35.019449]
[ 35.019889] dump_stack_lvl+0x8b/0xb3
[ 35.020641] debug_check_no_locks_freed.cold+0xa5/0xb1
[ 35.021677] ? kernfs_put.part.0+0x334/0x540
[ 35.022567] kfree+0xb3/0x5a0
[ 35.023179] ? kmem_cache_free+0xce/0x640
[ 35.023991] kernfs_put.part.0+0x334/0x540
[ 35.024825] kernfs_put+0x42/0x50
[ 35.025501] __kernfs_remove+0x7ce/0xb00
[ 35.026307] ? lock_is_held_type+0xd7/0x130
[ 35.027155] ? kernfs_next_descendant_post+0x2f0/0x2f0
[ 35.028193] ? down_write+0xde/0x150
[ 35.028929] ? down_write_killable_nested+0x180/0x180
[ 35.029973] kernfs_destroy_root+0x89/0xb0
[ 35.030812] css_free_rwork_fn+0xa28/0xf40
[ 35.031662] process_one_work+0xa30/0x1710
[ 35.032512] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 35.033444] ? rwlock_bug.part.0+0x90/0x90
[ 35.034293] ? _raw_spin_lock_irq+0x41/0x50
[ 35.035161] worker_thread+0x62a/0x13e0
[ 35.035961] ? process_one_work+0x1710/0x1710
[ 35.036855] kthread+0x40c/0x500
[ 35.037529] ? set_kthread_struct+0x130/0x130
[ 35.038430] ret_from_fork+0x22/0x30
[ 35.039181]
[ 35.039756] ==================================================================
[ 35.041192] BUG: KASAN: use-after-free in up_write+0x3ac/0x460
[ 35.042385] Read of size 8 at addr ffff88800e643540 by task kworker/0:2/48
[ 35.043754]
[ 35.044074] CPU: 0 PID: 48 Comm: kworker/0:2 Not tainted 5.16.0-rc3-next-20211203 #1
[ 35.045615] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 35.047862] Workqueue: cgroup_destroy css_free_rwork_fn
[ 35.048922] Call Trace:
[ 35.049429]
[ 35.049883] dump_stack_lvl+0x8b/0xb3
[ 35.050635] print_address_description.constprop.0+0x1f/0x180
[ 35.051790] ? up_write+0x3ac/0x460
[ 35.052506] ? up_write+0x3ac/0x460
[ 35.053225] kasan_report.cold+0x7f/0x11b
[ 35.054062] ? up_write+0x3ac/0x460
[ 35.054774] up_write+0x3ac/0x460
[ 35.055462] css_free_rwork_fn+0xa28/0xf40
[ 35.056307] process_one_work+0xa30/0x1710
[ 35.057152] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 35.058086] ? rwlock_bug.part.0+0x90/0x90
[ 35.058924] ? _raw_spin_lock_irq+0x41/0x50
[ 35.059778] worker_thread+0x62a/0x13e0
[ 35.060575] ? process_one_work+0x1710/0x1710
[ 35.061462] kthread+0x40c/0x500
[ 35.062154] ? set_kthread_struct+0x130/0x130
[ 35.063039] ret_from_fork+0x22/0x30
[ 35.063782]
[ 35.064234]
[ 35.064553] Allocated by task 281:
[ 35.065240] kasan_save_stack+0x1e/0x40
[ 35.066037] __kasan_kmalloc+0x81/0xa0
[ 35.066802] kernfs_create_root+0x4c/0x410
[ 35.067633] cgroup_setup_root+0x346/0xb60
[ 35.068462] cgroup1_get_tree+0xc1b/0x1370
[ 35.069300] vfs_get_tree+0x8e/0x2f0
[ 35.070049] path_mount+0x131b/0x1f80
[ 35.070802] __x64_sys_mount+0x27e/0x300
[ 35.071598] do_syscall_64+0x3b/0x90
[ 35.072331] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 35.073343]
[ 35.073661] Freed by task 48:
[ 35.074280] kasan_save_stack+0x1e/0x40
[ 35.075066] kasan_set_track+0x21/0x30
[ 35.075832] kasan_set_free_info+0x20/0x30
[ 35.076669] __kasan_slab_free+0x108/0x170
[ 35.077496] kfree+0xc5/0x5a0
[ 35.078118] kernfs_put.part.0+0x334/0x540
[ 35.078953] kernfs_put+0x42/0x50
[ 35.079625] __kernfs_remove+0x7ce/0xb00
[ 35.080416] kernfs_destroy_root+0x89/0xb0
[ 35.081252] css_free_rwork_fn+0xa28/0xf40
[ 35.082090] process_one_work+0xa30/0x1710
[ 35.082922] worker_thread+0x62a/0x13e0
[ 35.083703] kthread+0x40c/0x500
[ 35.084366] ret_from_fork+0x22/0x30
[ 35.085092]
[ 35.085407] The buggy address belongs to the object at ffff88800e643400
[ 35.085407] which belongs to the cache kmalloc-512 of size 512
[ 35.087846] The buggy address is located 320 bytes inside of
[ 35.087846] 512-byte region [ffff88800e643400, ffff88800e643600)
[ 35.090141] The buggy address belongs to the page:
[ 35.091090] page:00000000267ec38a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe640
[ 35.092895] head:00000000267ec38a order:2 compound_mapcount:0 compound_pincount:0
[ 35.094381] flags: 0x100000000010200(slab|head|node=0|zone=1)
[ 35.095534] raw: 0100000000010200 0000000000000000 dead000000000001 ffff888007841c80
[ 35.097050] raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
[ 35.098568] page dumped because: kasan: bad access detected
[ 35.099664]
[ 35.099982] Memory state around the buggy address:
[ 35.100930] ffff88800e643400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 35.102363] ffff88800e643480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 35.103774] >ffff88800e643500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 35.105182] ^
[ 35.106237] ffff88800e643580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 35.107655] ffff88800e643600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 35.109068] ==================================================================
[ 35.159801] cgroup: Unknown subsys name 'hugetlb'
[ 35.162191] cgroup: Unknown subsys name 'rlimit'
executing program
executing program
executing program
VM DIAGNOSIS:
11:38:36 Registers:
info registers vcpu 0
RAX=dffffc0000000060 RBX=00000000000003fd RCX=0000000000000000 RDX=00000000000003fd
RSI=ffffffff8236405c RDI=ffffffff87381a60 RBP=ffffffff87381a20 RSP=ffff88800ef6f5f0
R8 =0000000000000029 R9 =000000000000002d 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=00007fef03282000 CR3=000000000f450000 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=00001f80
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 ffffffffffffff00 ffffffffffffff00
YMM02=0000000000000000 0000000000000000 696e752f646d6574 7379732f6e75722f
YMM03=0000000000000000 0000000000000000 003a6e6f69746163 6f766e692f737469
YMM04=0000000000000000 0000000000000000 6c6c615f73757043 0a64656c62616e65
YMM05=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM06=0000000000000000 0000000000000000 6c61614273636543 0a64654962616965
YMM07=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM08=0000000000000000 0000000000000000 0000000000000051 0000000000000000
YMM09=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM10=0000000000000000 0000000000000000 2020000000002020 2020202020200000
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
info registers vcpu 1
RAX=0000000080000001 RBX=ffff88806ce3ed20 RCX=0000000080000001 RDX=0000000000000000
RSI=ffffffff813865f9 RDI=0000000000000003 RBP=0000000000000003 RSP=ffff888016e5f928
R8 =0000000000000000 R9 =0000000000000001 R10=ffffffff8138661f R11=0000000000000000
R12=ffffed100d9c7da5 R13=0000000000000000 R14=ffff88806ce3ed28 R15=0000000000000001
RIP=ffffffff814316ad RFL=00000202 [-------] 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 0000555555d7d400 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=00007fef031f5d90 CR3=000000000e448000 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=00001f80
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 0000000000000000
YMM03=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM04=0000000000000000 0000000000000000 ffffffffffffffff ffffffffffffffff
YMM05=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM06=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM07=0000000000000000 0000000000000000 0000000000000000 0000000000000000
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