Debian GNU/Linux 11 syzkaller ttyS0
Warning: Permanently added '[localhost]:49931' (ECDSA) to the list of known hosts.
2021/12/06 11:28:24 fuzzer started
2021/12/06 11:28:24 dialing manager at localhost:35719
2021/12/06 11:28:24 checking machine...
2021/12/06 11:28:24 checking revisions...
syzkaller login: [ 28.094725] kmemleak: Automatic memory scanning thread ended
2021/12/06 11:28:24 testing simple program...
[ 28.125119] cgroup: Unknown subsys name 'net'
[ 28.126274] cgroup: Unknown subsys name 'net_prio'
[ 28.128375] cgroup: Unknown subsys name 'devices'
[ 28.129853] cgroup: Unknown subsys name 'blkio'
[ 28.151457]
[ 28.151741] =========================
[ 28.152338] WARNING: held lock freed!
[ 28.152920] 5.16.0-rc3-next-20211203 #1 Not tainted
[ 28.154054] -------------------------
[ 28.154991] kworker/0:2/48 is freeing memory ffff88801ac95c00-ffff88801ac95dff, with a lock still held there!
[ 28.156900] ffff88801ac95d48 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 28.158318] 3 locks held by kworker/0:2/48:
[ 28.158990] #0: ffff8880080a6138 ((wq_completion)cgroup_destroy){+.+.}-{0:0}, at: process_one_work+0x929/0x1710
[ 28.160673] #1: ffff88800bc2fda8 ((work_completion)(&(&css->destroy_rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x95d/0x1710
[ 28.162435] #2: ffff88801ac95d48 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 28.163650]
[ 28.163650] stack backtrace:
[ 28.164247] CPU: 0 PID: 48 Comm: kworker/0:2 Not tainted 5.16.0-rc3-next-20211203 #1
[ 28.165279] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 28.166751] Workqueue: cgroup_destroy css_free_rwork_fn
[ 28.167451] Call Trace:
[ 28.167791] <TASK>
[ 28.168080] dump_stack_lvl+0x8b/0xb3
[ 28.168577] debug_check_no_locks_freed.cold+0xa5/0xb1
[ 28.169279] ? kernfs_put.part.0+0x334/0x540
[ 28.169871] kfree+0xb3/0x5a0
[ 28.170277] ? kmem_cache_free+0xce/0x640
[ 28.170913] kernfs_put.part.0+0x334/0x540
[ 28.171580] kernfs_put+0x42/0x50
[ 28.172121] __kernfs_remove+0x7ce/0xb00
[ 28.172755] ? lock_is_held_type+0xd7/0x130
[ 28.173449] ? kernfs_next_descendant_post+0x2f0/0x2f0
[ 28.174269] ? down_write+0xde/0x150
[ 28.174849] ? down_write_killable_nested+0x180/0x180
[ 28.175654] kernfs_destroy_root+0x89/0xb0
[ 28.176312] css_free_rwork_fn+0xa28/0xf40
[ 28.176977] process_one_work+0xa30/0x1710
[ 28.177663] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 28.178391] ? rwlock_bug.part.0+0x90/0x90
[ 28.179051] ? _raw_spin_lock_irq+0x41/0x50
[ 28.179729] worker_thread+0x62a/0x13e0
[ 28.180354] ? process_one_work+0x1710/0x1710
[ 28.181059] kthread+0x40c/0x500
[ 28.181596] ? set_kthread_struct+0x130/0x130
[ 28.182231] ret_from_fork+0x22/0x30
[ 28.182734] </TASK>
[ 28.183113] ==================================================================
[ 28.184024] BUG: KASAN: use-after-free in up_write+0x3ac/0x460
[ 28.184788] Read of size 8 at addr ffff88801ac95d40 by task kworker/0:2/48
[ 28.185674]
[ 28.185907] CPU: 0 PID: 48 Comm: kworker/0:2 Not tainted 5.16.0-rc3-next-20211203 #1
[ 28.186914] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 28.188400] Workqueue: cgroup_destroy css_free_rwork_fn
[ 28.189121] Call Trace:
[ 28.189486] <TASK>
[ 28.189803] dump_stack_lvl+0x8b/0xb3
[ 28.190301] print_address_description.constprop.0+0x1f/0x180
[ 28.191100] ? up_write+0x3ac/0x460
[ 28.191590] ? up_write+0x3ac/0x460
[ 28.192074] kasan_report.cold+0x7f/0x11b
[ 28.192634] ? up_write+0x3ac/0x460
[ 28.193123] up_write+0x3ac/0x460
[ 28.193615] css_free_rwork_fn+0xa28/0xf40
[ 28.194194] process_one_work+0xa30/0x1710
[ 28.194798] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 28.195399] ? rwlock_bug.part.0+0x90/0x90
[ 28.195979] ? _raw_spin_lock_irq+0x41/0x50
[ 28.196556] worker_thread+0x62a/0x13e0
[ 28.197096] ? process_one_work+0x1710/0x1710
[ 28.197704] kthread+0x40c/0x500
[ 28.198171] ? set_kthread_struct+0x130/0x130
[ 28.198798] ret_from_fork+0x22/0x30
[ 28.199287] </TASK>
[ 28.199601]
[ 28.199834] Allocated by task 280:
[ 28.200282] kasan_save_stack+0x1e/0x40
[ 28.200829] __kasan_kmalloc+0x81/0xa0
[ 28.201353] kernfs_create_root+0x4c/0x410
[ 28.201939] cgroup_setup_root+0x346/0xb60
[ 28.202514] cgroup1_get_tree+0xc1b/0x1370
[ 28.203086] vfs_get_tree+0x8e/0x2f0
[ 28.203587] path_mount+0x131b/0x1f80
[ 28.204099] __x64_sys_mount+0x27e/0x300
[ 28.204642] do_syscall_64+0x3b/0x90
[ 28.205151] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 28.205862]
[ 28.206072] Freed by task 48:
[ 28.206490] kasan_save_stack+0x1e/0x40
[ 28.207030] kasan_set_track+0x21/0x30
[ 28.207553] kasan_set_free_info+0x20/0x30
[ 28.208122] __kasan_slab_free+0x108/0x170
[ 28.208688] kfree+0xc5/0x5a0
[ 28.209111] kernfs_put.part.0+0x334/0x540
[ 28.209708] kernfs_put+0x42/0x50
[ 28.210182] __kernfs_remove+0x7ce/0xb00
[ 28.210735] kernfs_destroy_root+0x89/0xb0
[ 28.211302] css_free_rwork_fn+0xa28/0xf40
[ 28.211883] process_one_work+0xa30/0x1710
[ 28.212434] worker_thread+0x62a/0x13e0
[ 28.212986] kthread+0x40c/0x500
[ 28.213440] ret_from_fork+0x22/0x30
[ 28.213965]
[ 28.214175] The buggy address belongs to the object at ffff88801ac95c00
[ 28.214175] which belongs to the cache kmalloc-512 of size 512
[ 28.215836] The buggy address is located 320 bytes inside of
[ 28.215836] 512-byte region [ffff88801ac95c00, ffff88801ac95e00)
[ 28.217367] The buggy address belongs to the page:
[ 28.218032] page:00000000f1e1c4fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ac94
[ 28.219264] head:00000000f1e1c4fa order:2 compound_mapcount:0 compound_pincount:0
[ 28.220258] flags: 0x100000000010200(slab|head|node=0|zone=1)
[ 28.221054] raw: 0100000000010200 ffffea0000374f00 dead000000000002 ffff888007841c80
[ 28.222114] raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
[ 28.223138] page dumped because: kasan: bad access detected
[ 28.223887]
[ 28.224098] Memory state around the buggy address:
[ 28.224734] ffff88801ac95c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.225710] ffff88801ac95c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.226685] >ffff88801ac95d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.227642] ^
[ 28.228347] ffff88801ac95d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.229477] ffff88801ac95e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 28.230424] ==================================================================
[ 28.249060] cgroup: Unknown subsys name 'hugetlb'
[ 28.249902] cgroup: Unknown subsys name 'rlimit'
executing program
executing program
executing program
VM DIAGNOSIS:
11:28:24 Registers:
info registers vcpu 0
RAX=dffffc0000000060 RBX=00000000000003fd RCX=0000000000000000 RDX=00000000000003fd
RSI=ffffffff8236405c RDI=ffffffff87381a60 RBP=ffffffff87381a20 RSP=ffff88800bc2f5f0
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=00007fffcf688000 CR3=000000000c55c000 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 2525252525252525 2525252525252525
YMM01=0000000000000000 0000000000000000 0000000000ff0000 00000000000000ff
YMM02=0000000000000000 0000000000000000 0000000000ff0000 00000000000000ff
YMM03=0000000000000000 0000000000000000 74616c7563657053 0a656c626172656e
YMM04=0000000000000000 0000000000000000 65206c616e6f6974 69646e6f63093a68
YMM05=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM06=0000000000000000 0000000000000000 65206c6163656953 0a646c6261093a68
YMM07=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM08=0000000000000000 0000000000000000 636f72702f006469 6e6f697373657300
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=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=0000561e03ce76e0 CR3=000000000c916000 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 4109990000000000
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