Debian GNU/Linux 11 syzkaller ttyS0
Warning: Permanently added '[localhost]:6932' (ECDSA) to the list of known hosts.
2021/12/06 11:27:25 fuzzer started
2021/12/06 11:27:25 dialing manager at localhost:35719
2021/12/06 11:27:25 checking machine...
2021/12/06 11:27:25 checking revisions...
syzkaller login: [ 28.810609] kmemleak: Automatic memory scanning thread ended
2021/12/06 11:27:25 testing simple program...
[ 28.847966] cgroup: Unknown subsys name 'net'
[ 28.849814] cgroup: Unknown subsys name 'net_prio'
[ 28.851709] cgroup: Unknown subsys name 'devices'
[ 28.853022] cgroup: Unknown subsys name 'blkio'
[ 28.873864]
[ 28.874213] =========================
[ 28.874971] WARNING: held lock freed!
[ 28.875735] 5.16.0-rc3-next-20211203 #1 Not tainted
[ 28.876932] -------------------------
[ 28.878170] kworker/0:2/47 is freeing memory ffff88800d46ac00-ffff88800d46adff, with a lock still held there!
[ 28.880532] ffff88800d46ad48 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 28.882297] 3 locks held by kworker/0:2/47:
[ 28.883176] #0: ffff8880080a6138 ((wq_completion)cgroup_destroy){+.+.}-{0:0}, at: process_one_work+0x929/0x1710
[ 28.885238] #1: ffff88800b477da8 ((work_completion)(&(&css->destroy_rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x95d/0x1710
[ 28.887577] #2: ffff88800d46ad48 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 28.889424]
[ 28.889424] stack backtrace:
[ 28.890296] CPU: 0 PID: 47 Comm: kworker/0:2 Not tainted 5.16.0-rc3-next-20211203 #1
[ 28.891824] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 28.894073] Workqueue: cgroup_destroy css_free_rwork_fn
[ 28.895131] Call Trace:
[ 28.895632]
[ 28.896085] dump_stack_lvl+0x8b/0xb3
[ 28.896844] debug_check_no_locks_freed.cold+0xa5/0xb1
[ 28.897899] ? kernfs_put.part.0+0x334/0x540
[ 28.898789] kfree+0xb3/0x5a0
[ 28.899408] ? kmem_cache_free+0xce/0x640
[ 28.900268] kernfs_put.part.0+0x334/0x540
[ 28.901121] kernfs_put+0x42/0x50
[ 28.901806] __kernfs_remove+0x7ce/0xb00
[ 28.902613] ? lock_is_held_type+0xd7/0x130
[ 28.903471] ? kernfs_next_descendant_post+0x2f0/0x2f0
[ 28.904533] ? down_write+0xde/0x150
[ 28.905282] ? down_write_killable_nested+0x180/0x180
[ 28.906296] kernfs_destroy_root+0x89/0xb0
[ 28.907119] css_free_rwork_fn+0xa28/0xf40
[ 28.907953] process_one_work+0xa30/0x1710
[ 28.908784] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 28.909698] ? rwlock_bug.part.0+0x90/0x90
[ 28.910529] ? _raw_spin_lock_irq+0x41/0x50
[ 28.911375] worker_thread+0x62a/0x13e0
[ 28.912179] ? process_one_work+0x1710/0x1710
[ 28.913063] kthread+0x40c/0x500
[ 28.913728] ? set_kthread_struct+0x130/0x130
[ 28.914600] ret_from_fork+0x22/0x30
[ 28.915335]
[ 28.915863] ==================================================================
[ 28.917296] BUG: KASAN: use-after-free in up_write+0x3ac/0x460
[ 28.918459] Read of size 8 at addr ffff88800d46ad40 by task kworker/0:2/47
[ 28.919811]
[ 28.920154] CPU: 0 PID: 47 Comm: kworker/0:2 Not tainted 5.16.0-rc3-next-20211203 #1
[ 28.921666] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 28.923872] Workqueue: cgroup_destroy css_free_rwork_fn
[ 28.924917] Call Trace:
[ 28.925417]
[ 28.925850] dump_stack_lvl+0x8b/0xb3
[ 28.926593] print_address_description.constprop.0+0x1f/0x180
[ 28.927737] ? up_write+0x3ac/0x460
[ 28.928468] ? up_write+0x3ac/0x460
[ 28.929180] kasan_report.cold+0x7f/0x11b
[ 28.929991] ? up_write+0x3ac/0x460
[ 28.930703] up_write+0x3ac/0x460
[ 28.931383] css_free_rwork_fn+0xa28/0xf40
[ 28.932229] process_one_work+0xa30/0x1710
[ 28.933061] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 28.933972] ? rwlock_bug.part.0+0x90/0x90
[ 28.934797] ? _raw_spin_lock_irq+0x41/0x50
[ 28.935644] worker_thread+0x62a/0x13e0
[ 28.936442] ? process_one_work+0x1710/0x1710
[ 28.937317] kthread+0x40c/0x500
[ 28.937975] ? set_kthread_struct+0x130/0x130
[ 28.938849] ret_from_fork+0x22/0x30
[ 28.939580]
[ 28.940041]
[ 28.940355] Allocated by task 279:
[ 28.941035] kasan_save_stack+0x1e/0x40
[ 28.941808] __kasan_kmalloc+0x81/0xa0
[ 28.942561] kernfs_create_root+0x4c/0x410
[ 28.943388] cgroup_setup_root+0x346/0xb60
[ 28.944221] cgroup1_get_tree+0xc1b/0x1370
[ 28.945053] vfs_get_tree+0x8e/0x2f0
[ 28.945781] path_mount+0x131b/0x1f80
[ 28.946523] __x64_sys_mount+0x27e/0x300
[ 28.947314] do_syscall_64+0x3b/0x90
[ 28.948059] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 28.949063]
[ 28.949379] Freed by task 47:
[ 28.949976] kasan_save_stack+0x1e/0x40
[ 28.950747] kasan_set_track+0x21/0x30
[ 28.951503] kasan_set_free_info+0x20/0x30
[ 28.952344] __kasan_slab_free+0x108/0x170
[ 28.953167] kfree+0xc5/0x5a0
[ 28.953772] kernfs_put.part.0+0x334/0x540
[ 28.954604] kernfs_put+0x42/0x50
[ 28.955278] __kernfs_remove+0x7ce/0xb00
[ 28.956079] kernfs_destroy_root+0x89/0xb0
[ 28.956903] css_free_rwork_fn+0xa28/0xf40
[ 28.957726] process_one_work+0xa30/0x1710
[ 28.958557] worker_thread+0x62a/0x13e0
[ 28.959330] kthread+0x40c/0x500
[ 28.960004] ret_from_fork+0x22/0x30
[ 28.960730]
[ 28.961043] Last potentially related work creation:
[ 28.962002] kasan_save_stack+0x1e/0x40
[ 28.962779] __kasan_record_aux_stack+0x97/0xa0
[ 28.963687] kvfree_call_rcu+0x2c/0x7a0
[ 28.964477] timerfd_release+0x103/0x230
[ 28.965272] __fput+0x281/0x9e0
[ 28.965917] task_work_run+0xe2/0x1a0
[ 28.966663] exit_to_user_mode_prepare+0x1be/0x1c0
[ 28.967617] syscall_exit_to_user_mode+0x19/0x50
[ 28.968560] do_syscall_64+0x48/0x90
[ 28.969281] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 28.970285]
[ 28.970602] The buggy address belongs to the object at ffff88800d46ac00
[ 28.970602] which belongs to the cache kmalloc-512 of size 512
[ 28.973021] The buggy address is located 320 bytes inside of
[ 28.973021] 512-byte region [ffff88800d46ac00, ffff88800d46ae00)
[ 28.975274] The buggy address belongs to the page:
[ 28.976232] page:00000000b2f1b3d9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd468
[ 28.978014] head:00000000b2f1b3d9 order:2 compound_mapcount:0 compound_pincount:0
[ 28.979467] flags: 0x100000000010200(slab|head|node=0|zone=1)
[ 28.980622] raw: 0100000000010200 ffffea0000340c00 dead000000000002 ffff888007841c80
[ 28.982132] raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
[ 28.983635] page dumped because: kasan: bad access detected
[ 28.984734]
[ 28.985051] Memory state around the buggy address:
[ 28.985987] ffff88800d46ac00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.987388] ffff88800d46ac80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.988806] >ffff88800d46ad00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.990202] ^
[ 28.991241] ffff88800d46ad80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.992656] ffff88800d46ae00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 28.994058] ==================================================================
[ 29.029690] cgroup: Unknown subsys name 'hugetlb'
[ 29.030615] cgroup: Unknown subsys name 'rlimit'
executing program
executing program
executing program
VM DIAGNOSIS:
11:27:26 Registers:
info registers vcpu 0
RAX=dffffc0000000060 RBX=00000000000003fd RCX=0000000000000000 RDX=00000000000003fd
RSI=ffffffff8236405c RDI=ffffffff87381a60 RBP=ffffffff87381a20 RSP=ffff88800b4775f0
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=00007ffe6ebb7b78 CR3=000000000eb60000 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 4112c10000000000
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=000056280411bdc5 CR3=000000000eb60000 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 413dd4c5e28b066c
YMM01=0000000000000000 0000000000000000 0000000000000000 3f847ae147ae147b
YMM02=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM03=0000000000000000 0000000000000000 0000000000000000 3f75a9fc83619998
YMM04=0000000000000000 0000000000000000 00007fd74eab7f00 0000000000415710
YMM05=0000000000000000 0000000000000000 0000000000b12758 000000c000390098
YMM06=0000000000000000 0000000000000000 0000000000505007 000000c00002a7c0
YMM07=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM08=0000000000000000 0000000000000000 00000000004643c6 0000000000000000
YMM09=0000000000000000 0000000000000000 00000000004643c1 0000000000000000
YMM10=0000000000000000 0000000000000000 000000c00000da00 000000c0003a42c0
YMM11=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM12=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM13=0000000000000000 0000000000000000 0000000200000000 0000000000000008
YMM14=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM15=0000000000000000 0000000000000000 0000000000000000 0000000000000000