Debian GNU/Linux 11 syzkaller ttyS0
Warning: Permanently added '[localhost]:23950' (ECDSA) to the list of known hosts.
2021/12/06 11:24:05 fuzzer started
2021/12/06 11:24:05 dialing manager at localhost:35719
2021/12/06 11:24:05 checking machine...
2021/12/06 11:24:05 checking revisions...
syzkaller login: [ 36.097235] kmemleak: Automatic memory scanning thread ended
2021/12/06 11:24:05 testing simple program...
[ 36.135810] cgroup: Unknown subsys name 'net'
[ 36.136452] cgroup: Unknown subsys name 'net_prio'
[ 36.137476] cgroup: Unknown subsys name 'devices'
[ 36.138373] cgroup: Unknown subsys name 'blkio'
[ 36.179775]
[ 36.180061] =========================
[ 36.180526] WARNING: held lock freed!
[ 36.181620] 5.16.0-rc3-next-20211203 #1 Not tainted
[ 36.182378] -------------------------
[ 36.182845] kworker/0:2/48 is freeing memory ffff88800d896c00-ffff88800d896dff, with a lock still held there!
[ 36.184060] ffff88800d896d48 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 36.185420] 3 locks held by kworker/0:2/48:
[ 36.186132] #0: ffff8880080a6138 ((wq_completion)cgroup_destroy){+.+.}-{0:0}, at: process_one_work+0x929/0x1710
[ 36.187451] #1: ffff88800f4cfda8 ((work_completion)(&(&css->destroy_rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x95d/0x1710
[ 36.189052] #2: ffff88800d896d48 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 36.190250]
[ 36.190250] stack backtrace:
[ 36.190798] CPU: 0 PID: 48 Comm: kworker/0:2 Not tainted 5.16.0-rc3-next-20211203 #1
[ 36.191749] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 36.193285] Workqueue: cgroup_destroy css_free_rwork_fn
[ 36.193955] Call Trace:
[ 36.194279]
[ 36.194555] dump_stack_lvl+0x8b/0xb3
[ 36.195046] debug_check_no_locks_freed.cold+0xa5/0xb1
[ 36.195714] ? kernfs_put.part.0+0x334/0x540
[ 36.196269] kfree+0xb3/0x5a0
[ 36.196670] ? kmem_cache_free+0xce/0x640
[ 36.197417] kernfs_put.part.0+0x334/0x540
[ 36.197999] kernfs_put+0x42/0x50
[ 36.198428] __kernfs_remove+0x7ce/0xb00
[ 36.198943] ? lock_is_held_type+0xd7/0x130
[ 36.199483] ? kernfs_next_descendant_post+0x2f0/0x2f0
[ 36.200166] ? down_write+0xde/0x150
[ 36.200646] ? down_write_killable_nested+0x180/0x180
[ 36.201442] kernfs_destroy_root+0x89/0xb0
[ 36.201976] css_free_rwork_fn+0xa28/0xf40
[ 36.202512] process_one_work+0xa30/0x1710
[ 36.203049] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 36.203668] ? rwlock_bug.part.0+0x90/0x90
[ 36.204192] ? _raw_spin_lock_irq+0x41/0x50
[ 36.204775] worker_thread+0x62a/0x13e0
[ 36.205556] ? process_one_work+0x1710/0x1710
[ 36.206127] kthread+0x40c/0x500
[ 36.206579] ? set_kthread_struct+0x130/0x130
[ 36.207160] ret_from_fork+0x22/0x30
[ 36.207657]
[ 36.208083] ==================================================================
[ 36.210488] BUG: KASAN: use-after-free in up_write+0x3ac/0x460
[ 36.211285] Read of size 8 at addr ffff88800d896d40 by task kworker/0:2/48
[ 36.212149]
[ 36.212356] CPU: 0 PID: 48 Comm: kworker/0:2 Not tainted 5.16.0-rc3-next-20211203 #1
[ 36.214012] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 36.215407] Workqueue: cgroup_destroy css_free_rwork_fn
[ 36.216084] Call Trace:
[ 36.216407]
[ 36.216723] dump_stack_lvl+0x8b/0xb3
[ 36.217353] print_address_description.constprop.0+0x1f/0x180
[ 36.218092] ? up_write+0x3ac/0x460
[ 36.218551] ? up_write+0x3ac/0x460
[ 36.219003] kasan_report.cold+0x7f/0x11b
[ 36.219523] ? up_write+0x3ac/0x460
[ 36.219975] up_write+0x3ac/0x460
[ 36.220408] css_free_rwork_fn+0xa28/0xf40
[ 36.221390] process_one_work+0xa30/0x1710
[ 36.221930] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 36.222701] ? rwlock_bug.part.0+0x90/0x90
[ 36.223304] ? _raw_spin_lock_irq+0x41/0x50
[ 36.223970] worker_thread+0x62a/0x13e0
[ 36.224538] ? process_one_work+0x1710/0x1710
[ 36.225175] kthread+0x40c/0x500
[ 36.225609] ? set_kthread_struct+0x130/0x130
[ 36.226180] ret_from_fork+0x22/0x30
[ 36.226695]
[ 36.226987]
[ 36.227192] Allocated by task 280:
[ 36.227622] kasan_save_stack+0x1e/0x40
[ 36.228129] __kasan_kmalloc+0x81/0xa0
[ 36.228616] kernfs_create_root+0x4c/0x410
[ 36.229300] cgroup_setup_root+0x346/0xb60
[ 36.229871] cgroup1_get_tree+0xc1b/0x1370
[ 36.230409] vfs_get_tree+0x8e/0x2f0
[ 36.230928] path_mount+0x131b/0x1f80
[ 36.231417] __x64_sys_mount+0x27e/0x300
[ 36.231933] do_syscall_64+0x3b/0x90
[ 36.232397] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 36.233238]
[ 36.233447] Freed by task 48:
[ 36.233874] kasan_save_stack+0x1e/0x40
[ 36.234368] kasan_set_track+0x21/0x30
[ 36.234852] kasan_set_free_info+0x20/0x30
[ 36.235386] __kasan_slab_free+0x108/0x170
[ 36.235910] kfree+0xc5/0x5a0
[ 36.236299] kernfs_put.part.0+0x334/0x540
[ 36.236966] kernfs_put+0x42/0x50
[ 36.237411] __kernfs_remove+0x7ce/0xb00
[ 36.237957] kernfs_destroy_root+0x89/0xb0
[ 36.238486] css_free_rwork_fn+0xa28/0xf40
[ 36.239015] process_one_work+0xa30/0x1710
[ 36.239582] worker_thread+0x62a/0x13e0
[ 36.240149] kthread+0x40c/0x500
[ 36.240631] ret_from_fork+0x22/0x30
[ 36.241236]
[ 36.241469] The buggy address belongs to the object at ffff88800d896c00
[ 36.241469] which belongs to the cache kmalloc-512 of size 512
[ 36.243203] The buggy address is located 320 bytes inside of
[ 36.243203] 512-byte region [ffff88800d896c00, ffff88800d896e00)
[ 36.244925] The buggy address belongs to the page:
[ 36.245610] page:00000000554ec397 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd894
[ 36.246955] head:00000000554ec397 order:2 compound_mapcount:0 compound_pincount:0
[ 36.248041] flags: 0x100000000010200(slab|head|node=0|zone=1)
[ 36.248900] raw: 0100000000010200 ffffea00003e9600 dead000000000002 ffff888007841c80
[ 36.250011] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
[ 36.251130] page dumped because: kasan: bad access detected
[ 36.251913]
[ 36.252142] Memory state around the buggy address:
[ 36.252871] ffff88800d896c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 36.253931] ffff88800d896c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 36.254932] >ffff88800d896d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 36.255915] ^
[ 36.256652] ffff88800d896d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 36.257562] ffff88800d896e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 36.258437] ==================================================================
[ 36.278493] cgroup: Unknown subsys name 'hugetlb'
[ 36.279506] cgroup: Unknown subsys name 'rlimit'
executing program
executing program
executing program
VM DIAGNOSIS:
11:24:06 Registers:
info registers vcpu 0
RAX=0000000000000039 RBX=00000000000003f8 RCX=0000000000000000 RDX=00000000000003f8
RSI=ffffffff823640e1 RDI=ffffffff87381a60 RBP=ffffffff87381a20 RSP=ffff88800f4cf538
R8 =0000000000000000 R9 =0000000000000039 R10=ffffffff82365d23 R11=000000000000000a
R12=0000000000000039 R13=0000000000000039 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=00007fffea07acf8 CR3=000000001d04e000 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 0000000000000000
YMM02=0000000000000000 0000000000000000 0000000000000000 40ecf00000000000
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
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=00007f6dd15dca00 CR3=000000001d04e000 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 40ecf00000000000
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