Starting [0;1;39mUpdate UTMP about System Runlevel Changes[0m...
[[0;32m OK [0m] Finished [0;1;39mUpdate UTMP about System Runlevel Changes[0m.
Debian GNU/Linux 11 syzkaller ttyS0
Warning: Permanently added '[localhost]:41976' (ECDSA) to the list of known hosts.
2021/12/06 11:30:20 fuzzer started
2021/12/06 11:30:20 dialing manager at localhost:35719
2021/12/06 11:30:20 checking machine...
2021/12/06 11:30:20 checking revisions...
syzkaller login: [ 28.669132] kmemleak: Automatic memory scanning thread ended
2021/12/06 11:30:20 testing simple program...
[ 28.727590] cgroup: Unknown subsys name 'net'
[ 28.728921] cgroup: Unknown subsys name 'net_prio'
[ 28.730702] cgroup: Unknown subsys name 'devices'
[ 28.732915] cgroup: Unknown subsys name 'blkio'
[ 28.760904]
[ 28.761248] =========================
[ 28.761996] WARNING: held lock freed!
[ 28.762741] 5.16.0-rc3-next-20211203 #1 Not tainted
[ 28.763845] -------------------------
[ 28.765010] kworker/0:2/48 is freeing memory ffff88800999b000-ffff88800999b1ff, with a lock still held there!
[ 28.767316] ffff88800999b148 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 28.769069] 3 locks held by kworker/0:2/48:
[ 28.769985] #0: ffff8880080a6138 ((wq_completion)cgroup_destroy){+.+.}-{0:0}, at: process_one_work+0x929/0x1710
[ 28.772039] #1: ffff88800b717da8 ((work_completion)(&(&css->destroy_rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x95d/0x1710
[ 28.774395] #2: ffff88800999b148 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 28.776223]
[ 28.776223] stack backtrace:
[ 28.777094] CPU: 0 PID: 48 Comm: kworker/0:2 Not tainted 5.16.0-rc3-next-20211203 #1
[ 28.778602] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 28.780796] Workqueue: cgroup_destroy css_free_rwork_fn
[ 28.781845] Call Trace:
[ 28.782372]
[ 28.782808] dump_stack_lvl+0x8b/0xb3
[ 28.783550] debug_check_no_locks_freed.cold+0xa5/0xb1
[ 28.784592] ? kernfs_put.part.0+0x334/0x540
[ 28.785448] kfree+0xb3/0x5a0
[ 28.786057] ? kmem_cache_free+0xce/0x640
[ 28.786872] kernfs_put.part.0+0x334/0x540
[ 28.787695] kernfs_put+0x42/0x50
[ 28.788377] __kernfs_remove+0x7ce/0xb00
[ 28.789162] ? lock_is_held_type+0xd7/0x130
[ 28.790021] ? kernfs_next_descendant_post+0x2f0/0x2f0
[ 28.791082] ? down_write+0xde/0x150
[ 28.791824] ? down_write_killable_nested+0x180/0x180
[ 28.792853] kernfs_destroy_root+0x89/0xb0
[ 28.793699] css_free_rwork_fn+0xa28/0xf40
[ 28.794557] process_one_work+0xa30/0x1710
[ 28.795409] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 28.796480] ? rwlock_bug.part.0+0x90/0x90
[ 28.797326] ? _raw_spin_lock_irq+0x41/0x50
[ 28.798210] worker_thread+0x62a/0x13e0
[ 28.799007] ? process_one_work+0x1710/0x1710
[ 28.799890] kthread+0x40c/0x500
[ 28.800557] ? set_kthread_struct+0x130/0x130
[ 28.801442] ret_from_fork+0x22/0x30
[ 28.802204]
[ 28.802773] ==================================================================
[ 28.804197] BUG: KASAN: use-after-free in up_write+0x3ac/0x460
[ 28.805360] Read of size 8 at addr ffff88800999b140 by task kworker/0:2/48
[ 28.806734]
[ 28.807056] CPU: 0 PID: 48 Comm: kworker/0:2 Not tainted 5.16.0-rc3-next-20211203 #1
[ 28.808600] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 28.810859] Workqueue: cgroup_destroy css_free_rwork_fn
[ 28.811922] Call Trace:
[ 28.812425]
[ 28.812864] dump_stack_lvl+0x8b/0xb3
[ 28.813621] print_address_description.constprop.0+0x1f/0x180
[ 28.814787] ? up_write+0x3ac/0x460
[ 28.815502] ? up_write+0x3ac/0x460
[ 28.816223] kasan_report.cold+0x7f/0x11b
[ 28.817046] ? up_write+0x3ac/0x460
[ 28.817761] up_write+0x3ac/0x460
[ 28.818458] css_free_rwork_fn+0xa28/0xf40
[ 28.819297] process_one_work+0xa30/0x1710
[ 28.820142] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 28.821059] ? rwlock_bug.part.0+0x90/0x90
[ 28.821891] ? _raw_spin_lock_irq+0x41/0x50
[ 28.822757] worker_thread+0x62a/0x13e0
[ 28.823546] ? process_one_work+0x1710/0x1710
[ 28.824433] kthread+0x40c/0x500
[ 28.825102] ? set_kthread_struct+0x130/0x130
[ 28.825983] ret_from_fork+0x22/0x30
[ 28.826727]
[ 28.827179]
[ 28.827496] Allocated by task 280:
[ 28.828182] kasan_save_stack+0x1e/0x40
[ 28.828962] __kasan_kmalloc+0x81/0xa0
[ 28.829724] kernfs_create_root+0x4c/0x410
[ 28.830567] cgroup_setup_root+0x346/0xb60
[ 28.831406] cgroup1_get_tree+0xc1b/0x1370
[ 28.832255] vfs_get_tree+0x8e/0x2f0
[ 28.832987] path_mount+0x131b/0x1f80
[ 28.833737] __x64_sys_mount+0x27e/0x300
[ 28.834542] do_syscall_64+0x3b/0x90
[ 28.835271] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 28.836284]
[ 28.836600] Freed by task 48:
[ 28.837203] kasan_save_stack+0x1e/0x40
[ 28.837983] kasan_set_track+0x21/0x30
[ 28.838767] kasan_set_free_info+0x20/0x30
[ 28.839599] __kasan_slab_free+0x108/0x170
[ 28.840422] kfree+0xc5/0x5a0
[ 28.841019] kernfs_put.part.0+0x334/0x540
[ 28.841828] kernfs_put+0x42/0x50
[ 28.842503] __kernfs_remove+0x7ce/0xb00
[ 28.843274] kernfs_destroy_root+0x89/0xb0
[ 28.844077] css_free_rwork_fn+0xa28/0xf40
[ 28.844886] process_one_work+0xa30/0x1710
[ 28.845695] worker_thread+0x62a/0x13e0
[ 28.846473] kthread+0x40c/0x500
[ 28.847117] ret_from_fork+0x22/0x30
[ 28.847830]
[ 28.848140] The buggy address belongs to the object at ffff88800999b000
[ 28.848140] which belongs to the cache kmalloc-512 of size 512
[ 28.850507] The buggy address is located 320 bytes inside of
[ 28.850507] 512-byte region [ffff88800999b000, ffff88800999b200)
[ 28.852729] The buggy address belongs to the page:
[ 28.853653] page:00000000e4227ee3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9998
[ 28.855428] head:00000000e4227ee3 order:2 compound_mapcount:0 compound_pincount:0
[ 28.856869] flags: 0x100000000010200(slab|head|node=0|zone=1)
[ 28.857997] raw: 0100000000010200 ffffea00003bd200 dead000000000002 ffff888007841c80
[ 28.859516] raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
[ 28.860997] page dumped because: kasan: bad access detected
[ 28.862062]
[ 28.862383] Memory state around the buggy address:
[ 28.863315] ffff88800999b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.864704] ffff88800999b080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.866079] >ffff88800999b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.867472] ^
[ 28.868497] ffff88800999b180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.869875] ffff88800999b200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 28.871271] ==================================================================
[ 28.931558] cgroup: Unknown subsys name 'hugetlb'
[ 28.934310] cgroup: Unknown subsys name 'rlimit'
executing program
executing program
executing program
VM DIAGNOSIS:
11:30:21 Registers:
info registers vcpu 0
RAX=dffffc0000000060 RBX=00000000000003fd RCX=0000000000000000 RDX=00000000000003fd
RSI=ffffffff8236405c RDI=ffffffff87381a60 RBP=ffffffff87381a20 RSP=ffff88800b7175f0
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=00007fffad7aa810 CR3=00000000093da000 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 000055a896254c00 7665642f7379732f
YMM02=0000000000000000 0000000000000000 ffff0000000000ff 0000000000000000
YMM03=0000000000000000 0000000000000000 0000000000000000 000000ff000000ff
YMM04=0000000000000000 0000000000000000 2f2f2f2f2f2f2f2f 2f2f2f2f2f2f2f2f
YMM05=0000000000000000 0000000000000000 0000000061adf440 000000001016c3c2
YMM06=0000000000000000 0000000000000000 0000000061adf440 000000000f5fa8c2
YMM07=0000000000000000 0000000000000000 0000000000000000 000000000f5fa8c2
YMM08=0000000000000000 0000000000000000 6e753c0075252e75 252e75252e752500
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=0000000000000000 RBX=1ffff11002e5cf25 RCX=ffffffff840574ba RDX=1ffffffff0bf6919
RSI=ffffffff85fb4894 RDI=ffffffff85b97848 RBP=0000000000000001 RSP=ffff8880172e78e0
R8 =ffffffff85fb48c4 R9 =ffffffff85fb48c8 R10=ffffed1002e5cf45 R11=0000000000034044
R12=ffff8880172e7a18 R13=ffff8880172e7a01 R14=ffff8880172e79c0 R15=ffffffff840574ba
RIP=ffffffff81114501 RFL=00000212 [----A--] 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 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=00007faddec27260 CR3=000000001d076000 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 756e696c2d34365f 3638782f62696c2f
YMM01=0000000000000000 0000000000000000 732e747079726362 696c2f756e672d78
YMM02=0000000000000000 0000000000000000 00312e6f732e7470 79726362696c2f75
YMM03=0000000000000000 0000000000000000 6e672d78756e696c 2d34365f3638782f
YMM04=0000000000000000 0000000000000000 0000000000000000 0000000000000000
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