Debian GNU/Linux 11 syzkaller ttyS0
Warning: Permanently added '[localhost]:28023' (ECDSA) to the list of known hosts.
2021/12/06 11:21:07 fuzzer started
2021/12/06 11:21:08 dialing manager at localhost:35719
2021/12/06 11:21:08 checking machine...
2021/12/06 11:21:08 checking revisions...
syzkaller login: [ 37.234487] kmemleak: Automatic memory scanning thread ended
2021/12/06 11:21:08 testing simple program...
[ 37.273519] cgroup: Unknown subsys name 'net'
[ 37.274842] cgroup: Unknown subsys name 'net_prio'
[ 37.278093] cgroup: Unknown subsys name 'devices'
[ 37.279189] cgroup: Unknown subsys name 'blkio'
[ 37.312226]
[ 37.312524] =========================
[ 37.313001] WARNING: held lock freed!
[ 37.313482] 5.16.0-rc3-next-20211203 #1 Not tainted
[ 37.314077] -------------------------
[ 37.314554] kworker/0:2/47 is freeing memory ffff88800e35d400-ffff88800e35d5ff, with a lock still held there!
[ 37.315749] ffff88800e35d548 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 37.316832] 3 locks held by kworker/0:2/47:
[ 37.317349] #0: ffff8880080a6138 ((wq_completion)cgroup_destroy){+.+.}-{0:0}, at: process_one_work+0x929/0x1710
[ 37.318633] #1: ffff88800efefda8 ((work_completion)(&(&css->destroy_rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x95d/0x1710
[ 37.320727] #2: ffff88800e35d548 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 37.322212]
[ 37.322212] stack backtrace:
[ 37.322826] CPU: 0 PID: 47 Comm: kworker/0:2 Not tainted 5.16.0-rc3-next-20211203 #1
[ 37.324107] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 37.325742] Workqueue: cgroup_destroy css_free_rwork_fn
[ 37.326508] Call Trace:
[ 37.326824]
[ 37.327104] dump_stack_lvl+0x8b/0xb3
[ 37.327576] debug_check_no_locks_freed.cold+0xa5/0xb1
[ 37.328256] ? kernfs_put.part.0+0x334/0x540
[ 37.328804] kfree+0xb3/0x5a0
[ 37.329187] ? kmem_cache_free+0xce/0x640
[ 37.329700] kernfs_put.part.0+0x334/0x540
[ 37.330223] kernfs_put+0x42/0x50
[ 37.332100] __kernfs_remove+0x7ce/0xb00
[ 37.332603] ? lock_is_held_type+0xd7/0x130
[ 37.333131] ? kernfs_next_descendant_post+0x2f0/0x2f0
[ 37.333776] ? down_write+0xde/0x150
[ 37.334232] ? down_write_killable_nested+0x180/0x180
[ 37.335601] kernfs_destroy_root+0x89/0xb0
[ 37.336118] css_free_rwork_fn+0xa28/0xf40
[ 37.336681] process_one_work+0xa30/0x1710
[ 37.337206] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 37.337772] ? rwlock_bug.part.0+0x90/0x90
[ 37.338287] ? _raw_spin_lock_irq+0x41/0x50
[ 37.338891] worker_thread+0x62a/0x13e0
[ 37.339386] ? process_one_work+0x1710/0x1710
[ 37.339942] kthread+0x40c/0x500
[ 37.340358] ? set_kthread_struct+0x130/0x130
[ 37.340905] ret_from_fork+0x22/0x30
[ 37.341364]
[ 37.341799] ==================================================================
[ 37.342735] BUG: KASAN: use-after-free in up_write+0x3ac/0x460
[ 37.343449] Read of size 8 at addr ffff88800e35d540 by task kworker/0:2/47
[ 37.344351]
[ 37.344552] CPU: 0 PID: 47 Comm: kworker/0:2 Not tainted 5.16.0-rc3-next-20211203 #1
[ 37.345521] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 37.351098] Workqueue: cgroup_destroy css_free_rwork_fn
[ 37.351755] Call Trace:
[ 37.352074]
[ 37.352349] dump_stack_lvl+0x8b/0xb3
[ 37.352820] print_address_description.constprop.0+0x1f/0x180
[ 37.353552] ? up_write+0x3ac/0x460
[ 37.354031] ? up_write+0x3ac/0x460
[ 37.358571] kasan_report.cold+0x7f/0x11b
[ 37.359086] ? up_write+0x3ac/0x460
[ 37.359532] up_write+0x3ac/0x460
[ 37.359953] css_free_rwork_fn+0xa28/0xf40
[ 37.360470] process_one_work+0xa30/0x1710
[ 37.361014] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 37.361601] ? rwlock_bug.part.0+0x90/0x90
[ 37.362094] ? _raw_spin_lock_irq+0x41/0x50
[ 37.366684] worker_thread+0x62a/0x13e0
[ 37.367174] ? process_one_work+0x1710/0x1710
[ 37.367775] kthread+0x40c/0x500
[ 37.368197] ? set_kthread_struct+0x130/0x130
[ 37.368777] ret_from_fork+0x22/0x30
[ 37.369242]
[ 37.369535]
[ 37.369781] Allocated by task 279:
[ 37.370215] kasan_save_stack+0x1e/0x40
[ 37.374707] __kasan_kmalloc+0x81/0xa0
[ 37.375185] kernfs_create_root+0x4c/0x410
[ 37.375699] cgroup_setup_root+0x346/0xb60
[ 37.376220] cgroup1_get_tree+0xc1b/0x1370
[ 37.376766] vfs_get_tree+0x8e/0x2f0
[ 37.377220] path_mount+0x131b/0x1f80
[ 37.377720] __x64_sys_mount+0x27e/0x300
[ 37.378222] do_syscall_64+0x3b/0x90
[ 37.382804] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 37.383428]
[ 37.383643] Freed by task 47:
[ 37.384045] kasan_save_stack+0x1e/0x40
[ 37.384529] kasan_set_track+0x21/0x30
[ 37.385004] kasan_set_free_info+0x20/0x30
[ 37.385538] __kasan_slab_free+0x108/0x170
[ 37.386063] kfree+0xc5/0x5a0
[ 37.386443] kernfs_put.part.0+0x334/0x540
[ 37.387017] kernfs_put+0x42/0x50
[ 37.387428] __kernfs_remove+0x7ce/0xb00
[ 37.387938] kernfs_destroy_root+0x89/0xb0
[ 37.388445] css_free_rwork_fn+0xa28/0xf40
[ 37.389006] process_one_work+0xa30/0x1710
[ 37.389513] worker_thread+0x62a/0x13e0
[ 37.390008] kthread+0x40c/0x500
[ 37.390436] ret_from_fork+0x22/0x30
[ 37.390947]
[ 37.391150] The buggy address belongs to the object at ffff88800e35d400
[ 37.391150] which belongs to the cache kmalloc-512 of size 512
[ 37.392664] The buggy address is located 320 bytes inside of
[ 37.392664] 512-byte region [ffff88800e35d400, ffff88800e35d600)
[ 37.394083] The buggy address belongs to the page:
[ 37.394739] page:0000000034d27a35 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe35c
[ 37.395859] head:0000000034d27a35 order:2 compound_mapcount:0 compound_pincount:0
[ 37.396774] flags: 0x100000000010200(slab|head|node=0|zone=1)
[ 37.397491] raw: 0100000000010200 dead000000000100 dead000000000122 ffff888007841c80
[ 37.398435] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
[ 37.399346] page dumped because: kasan: bad access detected
[ 37.400016]
[ 37.400243] Memory state around the buggy address:
[ 37.400836] ffff88800e35d400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 37.401745] ffff88800e35d480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 37.402915] >ffff88800e35d500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 37.403783] ^
[ 37.404441] ffff88800e35d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 37.405344] ffff88800e35d600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 37.406265] ==================================================================
[ 37.452121] cgroup: Unknown subsys name 'hugetlb'
[ 37.453120] cgroup: Unknown subsys name 'rlimit'
executing program
executing program
executing program
VM DIAGNOSIS:
11:21:08 Registers:
info registers vcpu 0
RAX=0000000000000030 RBX=00000000000003f8 RCX=0000000000000000 RDX=00000000000003f8
RSI=ffffffff823640e1 RDI=ffffffff87381a60 RBP=ffffffff87381a20 RSP=ffff88800efef6c0
R8 =0000000000000000 R9 =0000000000000030 R10=ffffffff82365d23 R11=000000000000000a
R12=0000000000000030 R13=0000000000000030 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=00007ffc8a703000 CR3=00000000186a8000 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 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
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=00007f2f74d272d0 CR3=00000000186a8000 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 e974115a14f8dea5 4f4ea1caaaf46a47
YMM02=0000000000000000 0000000000000000 6b1e99b806172e3b 00000000000aea20
YMM03=0000000000000000 0000000000000000 375afdebbf381c81 00000000000e5e98
YMM04=0000000000000000 0000000000000000 e35a77d0916fa433 00000000001310c8
YMM05=0000000000000000 0000000000000000 d3fdd5f48436fbd7 00000000000aeac8
YMM06=0000000000000000 0000000000000000 0d1774d2c98faf5e 00000000000ae980
YMM07=0000000000000000 0000000000000000 a1fcdcf819d7e1e5 00000000000ae728
YMM08=0000000000000000 0000000000000000 44495f474f4c5359 530069253d595449
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