Warning: Permanently added '[localhost]:18486' (ECDSA) to the list of known hosts.
2021/12/06 11:23:51 fuzzer started
2021/12/06 11:23:51 dialing manager at localhost:35719
2021/12/06 11:23:51 checking machine...
2021/12/06 11:23:51 checking revisions...
syzkaller login: [ 37.056821] kmemleak: Automatic memory scanning thread ended
2021/12/06 11:23:52 testing simple program...
[ 37.099863] cgroup: Unknown subsys name 'net'
[ 37.109819] cgroup: Unknown subsys name 'net_prio'
[ 37.110708] cgroup: Unknown subsys name 'devices'
[ 37.112229] cgroup: Unknown subsys name 'blkio'
[ 37.159937]
[ 37.160201] =========================
[ 37.160701] WARNING: held lock freed!
[ 37.161154] 5.16.0-rc3-next-20211203 #1 Not tainted
[ 37.161790] -------------------------
[ 37.162239] kworker/0:3/209 is freeing memory ffff88800ece7c00-ffff88800ece7dff, with a lock still held there!
[ 37.163516] ffff88800ece7d48 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 37.164606] 3 locks held by kworker/0:3/209:
[ 37.165140] #0: ffff8880080a6138 ((wq_completion)cgroup_destroy){+.+.}-{0:0}, at: process_one_work+0x929/0x1710
[ 37.166421] #1: ffff88800cfc7da8 ((work_completion)(&(&css->destroy_rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x95d/0x1710
[ 37.167905] #2: ffff88800ece7d48 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 37.169062]
[ 37.169062] stack backtrace:
[ 37.173677] CPU: 0 PID: 209 Comm: kworker/0:3 Not tainted 5.16.0-rc3-next-20211203 #1
[ 37.174645] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 37.176018] Workqueue: cgroup_destroy css_free_rwork_fn
[ 37.176677] Call Trace:
[ 37.176991]
[ 37.177266] dump_stack_lvl+0x8b/0xb3
[ 37.178254] debug_check_no_locks_freed.cold+0xa5/0xb1
[ 37.179902] ? kernfs_put.part.0+0x334/0x540
[ 37.181239] kfree+0xb3/0x5a0
[ 37.182298] ? kmem_cache_free+0xce/0x640
[ 37.183657] kernfs_put.part.0+0x334/0x540
[ 37.184928] kernfs_put+0x42/0x50
[ 37.185999] __kernfs_remove+0x7ce/0xb00
[ 37.187230] ? lock_is_held_type+0xd7/0x130
[ 37.188541] ? kernfs_next_descendant_post+0x2f0/0x2f0
[ 37.190542] ? down_write+0xde/0x150
[ 37.191667] ? down_write_killable_nested+0x180/0x180
[ 37.193241] kernfs_destroy_root+0x89/0xb0
[ 37.194542] css_free_rwork_fn+0xa28/0xf40
[ 37.195830] process_one_work+0xa30/0x1710
[ 37.197114] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 37.198597] ? rwlock_bug.part.0+0x90/0x90
[ 37.199879] ? _raw_spin_lock_irq+0x41/0x50
[ 37.201193] worker_thread+0x62a/0x13e0
[ 37.202401] ? process_one_work+0x1710/0x1710
[ 37.203746] kthread+0x40c/0x500
[ 37.204975] ? set_kthread_struct+0x130/0x130
[ 37.206334] ret_from_fork+0x22/0x30
[ 37.207484]
[ 37.208263] ==================================================================
[ 37.210606] BUG: KASAN: use-after-free in up_write+0x3ac/0x460
[ 37.212642] Read of size 8 at addr ffff88800ece7d40 by task kworker/0:3/209
[ 37.215048]
[ 37.215602] CPU: 0 PID: 209 Comm: kworker/0:3 Not tainted 5.16.0-rc3-next-20211203 #1
[ 37.225793] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 37.227202] Workqueue: cgroup_destroy css_free_rwork_fn
[ 37.227938] Call Trace:
[ 37.228264]
[ 37.228569] dump_stack_lvl+0x8b/0xb3
[ 37.229060] print_address_description.constprop.0+0x1f/0x180
[ 37.229806] ? up_write+0x3ac/0x460
[ 37.230261] ? up_write+0x3ac/0x460
[ 37.230766] kasan_report.cold+0x7f/0x11b
[ 37.231295] ? up_write+0x3ac/0x460
[ 37.231784] up_write+0x3ac/0x460
[ 37.232226] css_free_rwork_fn+0xa28/0xf40
[ 37.232810] process_one_work+0xa30/0x1710
[ 37.233353] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 37.233957] ? rwlock_bug.part.0+0x90/0x90
[ 37.234489] ? _raw_spin_lock_irq+0x41/0x50
[ 37.235044] worker_thread+0x62a/0x13e0
[ 37.235559] ? process_one_work+0x1710/0x1710
[ 37.236125] kthread+0x40c/0x500
[ 37.236557] ? set_kthread_struct+0x130/0x130
[ 37.237125] ret_from_fork+0x22/0x30
[ 37.245691]
[ 37.245981]
[ 37.246179] Allocated by task 280:
[ 37.246622] kasan_save_stack+0x1e/0x40
[ 37.247120] __kasan_kmalloc+0x81/0xa0
[ 37.247598] kernfs_create_root+0x4c/0x410
[ 37.248111] cgroup_setup_root+0x346/0xb60
[ 37.248628] cgroup1_get_tree+0xc1b/0x1370
[ 37.249145] vfs_get_tree+0x8e/0x2f0
[ 37.249637] path_mount+0x131b/0x1f80
[ 37.250074] __x64_sys_mount+0x27e/0x300
[ 37.250531] do_syscall_64+0x3b/0x90
[ 37.250948] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 37.251529]
[ 37.251712] Freed by task 209:
[ 37.252066] kasan_save_stack+0x1e/0x40
[ 37.252514] kasan_set_track+0x21/0x30
[ 37.252950] kasan_set_free_info+0x20/0x30
[ 37.253427] __kasan_slab_free+0x108/0x170
[ 37.254050] kfree+0xc5/0x5a0
[ 37.254401] kernfs_put.part.0+0x334/0x540
[ 37.254880] kernfs_put+0x42/0x50
[ 37.255269] __kernfs_remove+0x7ce/0xb00
[ 37.255732] kernfs_destroy_root+0x89/0xb0
[ 37.256202] css_free_rwork_fn+0xa28/0xf40
[ 37.256682] process_one_work+0xa30/0x1710
[ 37.257159] worker_thread+0x62a/0x13e0
[ 37.257624] kthread+0x40c/0x500
[ 37.258127] ret_from_fork+0x22/0x30
[ 37.258676]
[ 37.258917] Last potentially related work creation:
[ 37.259646] kasan_save_stack+0x1e/0x40
[ 37.260233] __kasan_record_aux_stack+0x97/0xa0
[ 37.260919] kvfree_call_rcu+0x2c/0x7a0
[ 37.261503] put_css_set_locked+0x7e6/0xcf0
[ 37.262131] cgroup_migrate_finish+0x3b5/0x580
[ 37.262763] cgroup_update_dfl_csses+0x331/0x570
[ 37.263418] cgroup_subtree_control_write+0x8fd/0xcf0
[ 37.264130] cgroup_file_write+0x1ef/0x7a0
[ 37.264714] kernfs_fop_write_iter+0x344/0x500
[ 37.265343] new_sync_write+0x42f/0x660
[ 37.265907] vfs_write+0x7d1/0xae0
[ 37.266394] ksys_write+0x12d/0x250
[ 37.266893] do_syscall_64+0x3b/0x90
[ 37.267405] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 37.268114]
[ 37.268333] The buggy address belongs to the object at ffff88800ece7c00
[ 37.268333] which belongs to the cache kmalloc-512 of size 512
[ 37.274015] The buggy address is located 320 bytes inside of
[ 37.274015] 512-byte region [ffff88800ece7c00, ffff88800ece7e00)
[ 37.275366] The buggy address belongs to the page:
[ 37.275931] page:000000006ced6fe9 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800ece7000 pfn:0xece4
[ 37.277180] head:000000006ced6fe9 order:2 compound_mapcount:0 compound_pincount:0
[ 37.278091] flags: 0x100000000010200(slab|head|node=0|zone=1)
[ 37.278811] raw: 0100000000010200 ffffea00003ddb08 ffffea00003a7708 ffff888007841c80
[ 37.279760] raw: ffff88800ece7000 000000000010000f 00000001ffffffff 0000000000000000
[ 37.280724] page dumped because: kasan: bad access detected
[ 37.281408]
[ 37.281641] Memory state around the buggy address:
[ 37.282304] ffff88800ece7c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 37.283306] ffff88800ece7c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 37.284321] >ffff88800ece7d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 37.285292] ^
[ 37.285958] ffff88800ece7d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 37.286800] ffff88800ece7e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 37.287602] ==================================================================
[ 37.324156] cgroup: Unknown subsys name 'hugetlb'
[ 37.324991] cgroup: Unknown subsys name 'rlimit'
executing program
executing program
executing program
VM DIAGNOSIS:
11:23:52 Registers:
info registers vcpu 0
RAX=dffffc0000000060 RBX=00000000000003fd RCX=0000000000000000 RDX=00000000000003fd
RSI=ffffffff8236405c RDI=ffffffff87381a60 RBP=ffffffff87381a20 RSP=ffff88800cfc74e0
R8 =0000000000000021 R9 =0000000000000039 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=00007f086f7c8dc0 CR3=000000000df6c000 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 4151303feda9a45c
YMM01=0000000000000000 0000000000000000 0000000000000000 3f847ae147ae147b
YMM02=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM03=0000000000000000 0000000000000000 0000000000000000 3f6debcdcbcfc62a
YMM04=0000000000000000 0000000000000000 000000c000098ab0 000000c000098770
YMM05=0000000000000000 0000000000000000 000000c000098aa0 000000c000098a80
YMM06=0000000000000000 0000000000000000 000000c000098ac0 000000c000098a70
YMM07=0000000000000000 0000000000000000 000000c000098a50 000000c000098a90
YMM08=0000000000000000 0000000000000000 000000c000098690 000000c0000986b0
YMM09=0000000000000000 0000000000000000 000000c00001c0e0 000000c0000986d0
YMM10=0000000000000000 0000000000000000 000000c00001c0b0 000000c00001c0c0
YMM11=0000000000000000 0000000000000000 000000c0002fdf50 000000c00001c0d0
YMM12=0000000000000000 0000000000000000 000000c0000981d0 000000c0000982a0
YMM13=0000000000000000 0000000000000000 000000c0000981f0 000000c0000981e0
YMM14=0000000000000000 0000000000000000 000000c0000981b0 000000c0000981c0
YMM15=0000000000000000 0000000000000000 000000c00057e000 000000c0000984a0
info registers vcpu 1
RAX=0000000000000000 RBX=ffffffff81336190 RCX=0000000000000000 RDX=ffff88800f941ac0
RSI=ffffffff813391ea RDI=ffff88801b26fde0 RBP=ffff88801b26fde0 RSP=ffff88806cf09e18
R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff813391dc R11=0000000000000000
R12=ffff88806cf2a740 R13=ffff88806cf2a7c0 R14=dffffc0000000000 R15=ffff88800f941ac0
RIP=ffffffff81336191 RFL=00000046 [---Z-P-] 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 0000555555949400 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=00007fb5b4037028 CR3=000000001b3ca000 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 3f73d061267420ce
YMM04=0000000000000000 0000000000000000 3a64656c69616620 2974656e202c7465
YMM05=0000000000000000 0000000000000000 67637a79732f2874 6e756f6d0a323220
YMM06=0000000000000000 0000000000000000 72705f74656e202c 74656e2f70756f72
YMM07=0000000000000000 0000000000000000 6d0a3232203a6465 6c69616620296f69
YMM08=0000000000000000 0000000000000000 7267637a79732f28 746e756f6d0a3232
YMM09=0000000000000000 0000000000000000 6972705f74656e20 2c74656e2f70756f
YMM10=0000000000000000 0000000000000000 6f6d0a3232203a64 656c69616620296f
YMM11=0000000000000000 0000000000000000 6e2f70756f726763 7a79732f28746e75
YMM12=0000000000000000 0000000000000000 6961662029736563 69766564202c7465
YMM13=0000000000000000 0000000000000000 732f28746e756f6d 0a3232203a64656c
YMM14=0000000000000000 0000000000000000 6c62202c74656e2f 70756f7267637a79
YMM15=0000000000000000 0000000000000000 0a3232203a64656c 69616620296f696b