Debian GNU/Linux 11 syzkaller ttyS0
Warning: Permanently added '[localhost]:15714' (ECDSA) to the list of known hosts.
2021/12/06 11:30:41 fuzzer started
2021/12/06 11:30:42 dialing manager at localhost:35719
2021/12/06 11:30:42 checking machine...
2021/12/06 11:30:42 checking revisions...
syzkaller login: [ 34.569387] kmemleak: Automatic memory scanning thread ended
2021/12/06 11:30:42 testing simple program...
[ 34.614003] cgroup: Unknown subsys name 'net'
[ 34.616150] cgroup: Unknown subsys name 'net_prio'
[ 34.618128] cgroup: Unknown subsys name 'devices'
[ 34.619813] cgroup: Unknown subsys name 'blkio'
[ 34.643977]
[ 34.644406] =========================
[ 34.645286] WARNING: held lock freed!
[ 34.646034] 5.16.0-rc3-next-20211203 #1 Not tainted
[ 34.646990] -------------------------
[ 34.647898] kworker/0:2/47 is freeing memory ffff88800e68b800-ffff88800e68b9ff, with a lock still held there!
[ 34.650755] ffff88800e68b948 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 34.652505] 3 locks held by kworker/0:2/47:
[ 34.653379] #0: ffff8880080a6138 ((wq_completion)cgroup_destroy){+.+.}-{0:0}, at: process_one_work+0x929/0x1710
[ 34.655390] #1: ffff88800b717da8 ((work_completion)(&(&css->destroy_rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x95d/0x1710
[ 34.657694] #2: ffff88800e68b948 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 34.659504]
[ 34.659504] stack backtrace:
[ 34.660360] CPU: 0 PID: 47 Comm: kworker/0:2 Not tainted 5.16.0-rc3-next-20211203 #1
[ 34.661891] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 34.664108] Workqueue: cgroup_destroy css_free_rwork_fn
[ 34.665164] Call Trace:
[ 34.665665]
[ 34.666100] dump_stack_lvl+0x8b/0xb3
[ 34.666857] debug_check_no_locks_freed.cold+0xa5/0xb1
[ 34.667892] ? kernfs_put.part.0+0x334/0x540
[ 34.668755] kfree+0xb3/0x5a0
[ 34.669380] ? kmem_cache_free+0xce/0x640
[ 34.670187] kernfs_put.part.0+0x334/0x540
[ 34.671025] kernfs_put+0x42/0x50
[ 34.671694] __kernfs_remove+0x7ce/0xb00
[ 34.672486] ? lock_is_held_type+0xd7/0x130
[ 34.673338] ? kernfs_next_descendant_post+0x2f0/0x2f0
[ 34.674382] ? down_write+0xde/0x150
[ 34.675108] ? down_write_killable_nested+0x180/0x180
[ 34.676116] kernfs_destroy_root+0x89/0xb0
[ 34.676942] css_free_rwork_fn+0xa28/0xf40
[ 34.677786] process_one_work+0xa30/0x1710
[ 34.678617] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 34.679533] ? rwlock_bug.part.0+0x90/0x90
[ 34.680371] ? _raw_spin_lock_irq+0x41/0x50
[ 34.681223] worker_thread+0x62a/0x13e0
[ 34.682004] ? process_one_work+0x1710/0x1710
[ 34.682880] kthread+0x40c/0x500
[ 34.683539] ? set_kthread_struct+0x130/0x130
[ 34.684412] ret_from_fork+0x22/0x30
[ 34.685159]
[ 34.685669] ==================================================================
[ 34.687084] BUG: KASAN: use-after-free in up_write+0x3ac/0x460
[ 34.688242] Read of size 8 at addr ffff88800e68b940 by task kworker/0:2/47
[ 34.689603]
[ 34.689919] CPU: 0 PID: 47 Comm: kworker/0:2 Not tainted 5.16.0-rc3-next-20211203 #1
[ 34.691427] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 34.693639] Workqueue: cgroup_destroy css_free_rwork_fn
[ 34.694696] Call Trace:
[ 34.695201]
[ 34.695638] dump_stack_lvl+0x8b/0xb3
[ 34.696380] print_address_description.constprop.0+0x1f/0x180
[ 34.697525] ? up_write+0x3ac/0x460
[ 34.698232] ? up_write+0x3ac/0x460
[ 34.698946] kasan_report.cold+0x7f/0x11b
[ 34.699754] ? up_write+0x3ac/0x460
[ 34.700460] up_write+0x3ac/0x460
[ 34.701155] css_free_rwork_fn+0xa28/0xf40
[ 34.701997] process_one_work+0xa30/0x1710
[ 34.702831] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 34.703740] ? rwlock_bug.part.0+0x90/0x90
[ 34.704583] ? _raw_spin_lock_irq+0x41/0x50
[ 34.705431] worker_thread+0x62a/0x13e0
[ 34.706218] ? process_one_work+0x1710/0x1710
[ 34.707090] kthread+0x40c/0x500
[ 34.707755] ? set_kthread_struct+0x130/0x130
[ 34.708632] ret_from_fork+0x22/0x30
[ 34.709373]
[ 34.709821]
[ 34.710137] Allocated by task 279:
[ 34.710814] kasan_save_stack+0x1e/0x40
[ 34.711605] __kasan_kmalloc+0x81/0xa0
[ 34.712362] kernfs_create_root+0x4c/0x410
[ 34.713202] cgroup_setup_root+0x346/0xb60
[ 34.714026] cgroup1_get_tree+0xc1b/0x1370
[ 34.714856] vfs_get_tree+0x8e/0x2f0
[ 34.715596] path_mount+0x131b/0x1f80
[ 34.716338] __x64_sys_mount+0x27e/0x300
[ 34.717135] do_syscall_64+0x3b/0x90
[ 34.717869] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 34.718875]
[ 34.719189] Freed by task 47:
[ 34.719787] kasan_save_stack+0x1e/0x40
[ 34.720561] kasan_set_track+0x21/0x30
[ 34.721333] kasan_set_free_info+0x20/0x30
[ 34.722147] __kasan_slab_free+0x108/0x170
[ 34.722962] kfree+0xc5/0x5a0
[ 34.723565] kernfs_put.part.0+0x334/0x540
[ 34.724399] kernfs_put+0x42/0x50
[ 34.725065] __kernfs_remove+0x7ce/0xb00
[ 34.725857] kernfs_destroy_root+0x89/0xb0
[ 34.726662] css_free_rwork_fn+0xa28/0xf40
[ 34.727474] process_one_work+0xa30/0x1710
[ 34.728291] worker_thread+0x62a/0x13e0
[ 34.729048] kthread+0x40c/0x500
[ 34.729736] ret_from_fork+0x22/0x30
[ 34.730448]
[ 34.730761] The buggy address belongs to the object at ffff88800e68b800
[ 34.730761] which belongs to the cache kmalloc-512 of size 512
[ 34.733138] The buggy address is located 320 bytes inside of
[ 34.733138] 512-byte region [ffff88800e68b800, ffff88800e68ba00)
[ 34.735367] The buggy address belongs to the page:
[ 34.736308] page:00000000ec5bb3b4 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800e689800 pfn:0xe688
[ 34.738343] head:00000000ec5bb3b4 order:2 compound_mapcount:0 compound_pincount:0
[ 34.739790] flags: 0x100000000010200(slab|head|node=0|zone=1)
[ 34.740913] raw: 0100000000010200 0000000000000000 dead000000000001 ffff888007841c80
[ 34.742419] raw: ffff88800e689800 000000008010000e 00000001ffffffff 0000000000000000
[ 34.743905] page dumped because: kasan: bad access detected
[ 34.744995]
[ 34.745314] Memory state around the buggy address:
[ 34.746256] ffff88800e68b800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 34.747660] ffff88800e68b880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 34.749086] >ffff88800e68b900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 34.750512] ^
[ 34.751565] ffff88800e68b980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 34.752967] ffff88800e68ba00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 34.754377] ==================================================================
[ 34.798175] cgroup: Unknown subsys name 'hugetlb'
[ 34.800053] cgroup: Unknown subsys name 'rlimit'
executing program
executing program
executing program
VM DIAGNOSIS:
11:30:42 Registers:
info registers vcpu 0
RAX=0000000000000034 RBX=00000000000003f8 RCX=0000000000000000 RDX=00000000000003f8
RSI=ffffffff823640e1 RDI=ffffffff87381a60 RBP=ffffffff87381a20 RSP=ffff88800b717648
R8 =0000000000000000 R9 =0000000000000034 R10=ffffffff82365d23 R11=000000000000000a
R12=0000000000000034 R13=0000000000000034 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=00007fffa946ac18 CR3=000000000d8a8000 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 414438292eee34af
YMM01=0000000000000000 0000000000000000 0000000000000000 3f847ae147ae147b
YMM02=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM03=0000000000000000 0000000000000000 0000000000000000 3f7392252d38c691
YMM04=0000000000000000 0000000000000000 00007f8669367500 0000000000415710
YMM05=0000000000000000 0000000000000000 0000000000000000 000000c0002022d8
YMM06=0000000000000000 0000000000000000 0000000000505007 000000c00033c7c0
YMM07=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM08=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM09=0000000000000000 0000000000000000 00000000004643c1 0000000000000000
YMM10=0000000000000000 0000000000000000 000000c000085c00 000000c000158840
YMM11=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM12=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM13=0000000000000000 0000000000000000 000000c000121620 000000c00008f080
YMM14=0000000000000000 0000000000000000 000000c000121680 000000c000121650
YMM15=0000000000000000 0000000000000000 000000c00012dce0 000000c0001216b0
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=00007fbac6de5000 CR3=000000000d8a8000 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 410bb50000000000
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