Warning: Permanently added '[localhost]:27096' (ECDSA) to the list of known hosts.
2021/12/06 11:24:53 fuzzer started
2021/12/06 11:24:54 dialing manager at localhost:35719
2021/12/06 11:24:54 checking machine...
2021/12/06 11:24:54 checking revisions...
syzkaller login: [ 37.182592] kmemleak: Automatic memory scanning thread ended
2021/12/06 11:24:54 testing simple program...
[ 37.231227] cgroup: Unknown subsys name 'net'
[ 37.232229] cgroup: Unknown subsys name 'net_prio'
[ 37.233887] cgroup: Unknown subsys name 'devices'
[ 37.234715] cgroup: Unknown subsys name 'blkio'
[ 37.264290]
[ 37.264555] =========================
[ 37.265023] WARNING: held lock freed!
[ 37.265480] 5.16.0-rc3-next-20211203 #1 Not tainted
[ 37.266074] -------------------------
[ 37.266517] kworker/0:1/10 is freeing memory ffff88800de45400-ffff88800de455ff, with a lock still held there!
[ 37.267611] ffff88800de45548 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 37.268670] 3 locks held by kworker/0:1/10:
[ 37.269236] #0: ffff8880080a6138 ((wq_completion)cgroup_destroy){+.+.}-{0:0}, at: process_one_work+0x929/0x1710
[ 37.270505] #1: ffff888008197da8 ((work_completion)(&(&css->destroy_rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x95d/0x1710
[ 37.271956] #2: ffff88800de45548 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 37.273120]
[ 37.273120] stack backtrace:
[ 37.273659] CPU: 0 PID: 10 Comm: kworker/0:1 Not tainted 5.16.0-rc3-next-20211203 #1
[ 37.274611] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 37.275988] Workqueue: cgroup_destroy css_free_rwork_fn
[ 37.276648] Call Trace:
[ 37.276992]
[ 37.277273] dump_stack_lvl+0x8b/0xb3
[ 37.277749] debug_check_no_locks_freed.cold+0xa5/0xb1
[ 37.278402] ? kernfs_put.part.0+0x334/0x540
[ 37.278950] kfree+0xb3/0x5a0
[ 37.279343] ? kmem_cache_free+0xce/0x640
[ 37.279856] kernfs_put.part.0+0x334/0x540
[ 37.280384] kernfs_put+0x42/0x50
[ 37.280834] __kernfs_remove+0x7ce/0xb00
[ 37.281342] ? lock_is_held_type+0xd7/0x130
[ 37.281880] ? kernfs_next_descendant_post+0x2f0/0x2f0
[ 37.282525] ? down_write+0xde/0x150
[ 37.282984] ? down_write_killable_nested+0x180/0x180
[ 37.283626] kernfs_destroy_root+0x89/0xb0
[ 37.284152] css_free_rwork_fn+0xa28/0xf40
[ 37.284680] process_one_work+0xa30/0x1710
[ 37.286902] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 37.287481] ? rwlock_bug.part.0+0x90/0x90
[ 37.288006] ? _raw_spin_lock_irq+0x41/0x50
[ 37.288547] worker_thread+0x62a/0x13e0
[ 37.289061] ? process_one_work+0x1710/0x1710
[ 37.289617] kthread+0x40c/0x500
[ 37.290037] ? set_kthread_struct+0x130/0x130
[ 37.290589] ret_from_fork+0x22/0x30
[ 37.291059]
[ 37.291456] ==================================================================
[ 37.292341] BUG: KASAN: use-after-free in up_write+0x3ac/0x460
[ 37.293378] Read of size 8 at addr ffff88800de45540 by task kworker/0:1/10
[ 37.294222]
[ 37.294424] CPU: 0 PID: 10 Comm: kworker/0:1 Not tainted 5.16.0-rc3-next-20211203 #1
[ 37.295371] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 37.296753] Workqueue: cgroup_destroy css_free_rwork_fn
[ 37.297647] Call Trace:
[ 37.297962]
[ 37.298243] dump_stack_lvl+0x8b/0xb3
[ 37.298715] print_address_description.constprop.0+0x1f/0x180
[ 37.299437] ? up_write+0x3ac/0x460
[ 37.299884] ? up_write+0x3ac/0x460
[ 37.300330] kasan_report.cold+0x7f/0x11b
[ 37.300860] ? up_write+0x3ac/0x460
[ 37.301322] up_write+0x3ac/0x460
[ 37.301752] css_free_rwork_fn+0xa28/0xf40
[ 37.302284] process_one_work+0xa30/0x1710
[ 37.302811] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 37.303387] ? rwlock_bug.part.0+0x90/0x90
[ 37.303907] ? _raw_spin_lock_irq+0x41/0x50
[ 37.304443] worker_thread+0x62a/0x13e0
[ 37.304962] ? process_one_work+0x1710/0x1710
[ 37.305517] kthread+0x40c/0x500
[ 37.305938] ? set_kthread_struct+0x130/0x130
[ 37.306495] ret_from_fork+0x22/0x30
[ 37.306962]
[ 37.307247]
[ 37.307447] Allocated by task 279:
[ 37.307874] kasan_save_stack+0x1e/0x40
[ 37.308365] __kasan_kmalloc+0x81/0xa0
[ 37.309026] kernfs_create_root+0x4c/0x410
[ 37.309547] cgroup_setup_root+0x346/0xb60
[ 37.310068] cgroup1_get_tree+0xc1b/0x1370
[ 37.310591] vfs_get_tree+0x8e/0x2f0
[ 37.311051] path_mount+0x131b/0x1f80
[ 37.311522] __x64_sys_mount+0x27e/0x300
[ 37.312021] do_syscall_64+0x3b/0x90
[ 37.312484] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 37.313147]
[ 37.313347] Freed by task 10:
[ 37.313767] kasan_save_stack+0x1e/0x40
[ 37.314255] kasan_set_track+0x21/0x30
[ 37.314732] kasan_set_free_info+0x20/0x30
[ 37.315252] __kasan_slab_free+0x108/0x170
[ 37.315771] kfree+0xc5/0x5a0
[ 37.316153] kernfs_put.part.0+0x334/0x540
[ 37.316679] kernfs_put+0x42/0x50
[ 37.317133] __kernfs_remove+0x7ce/0xb00
[ 37.317629] kernfs_destroy_root+0x89/0xb0
[ 37.318146] css_free_rwork_fn+0xa28/0xf40
[ 37.318668] process_one_work+0xa30/0x1710
[ 37.319194] worker_thread+0x62a/0x13e0
[ 37.319684] kthread+0x40c/0x500
[ 37.320101] ret_from_fork+0x22/0x30
[ 37.320560]
[ 37.320772] The buggy address belongs to the object at ffff88800de45400
[ 37.320772] which belongs to the cache kmalloc-512 of size 512
[ 37.322289] The buggy address is located 320 bytes inside of
[ 37.322289] 512-byte region [ffff88800de45400, ffff88800de45600)
[ 37.323701] The buggy address belongs to the page:
[ 37.324291] page:00000000bb3d92b8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde44
[ 37.325614] head:00000000bb3d92b8 order:2 compound_mapcount:0 compound_pincount:0
[ 37.326527] flags: 0x100000000010200(slab|head|node=0|zone=1)
[ 37.327252] raw: 0100000000010200 0000000000000000 dead000000000001 ffff888007841c80
[ 37.328195] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
[ 37.329169] page dumped because: kasan: bad access detected
[ 37.329849]
[ 37.330048] Memory state around the buggy address:
[ 37.330638] ffff88800de45400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 37.331516] ffff88800de45480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 37.332394] >ffff88800de45500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 37.333305] ^
[ 37.333957] ffff88800de45580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 37.334834] ffff88800de45600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 37.335706] ==================================================================
[ 37.385545] cgroup: Unknown subsys name 'hugetlb'
[ 37.386427] cgroup: Unknown subsys name 'rlimit'
executing program
executing program
executing program
VM DIAGNOSIS:
11:24:55 Registers:
info registers vcpu 0
RAX=dffffc0000000060 RBX=00000000000003fd RCX=0000000000000000 RDX=00000000000003fd
RSI=ffffffff8236405c RDI=ffffffff87381a60 RBP=ffffffff87381a20 RSP=ffff8880081977a8
R8 =0000000000000042 R9 =0000000000000070 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=00007f95fb72c6d0 CR3=000000000cbda000 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 40e79e0000000000
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=0000000000000000 RBX=ffff88806ce3ed20 RCX=0000000000000000 RDX=ffff888017298000
RSI=ffffffff813865f9 RDI=0000000000000003 RBP=0000000000000003 RSP=ffff888017807930
R8 =0000000000000000 R9 =0000000000000001 R10=ffffffff8138661f R11=0000000000000000
R12=ffffed100d9c7da5 R13=0000000000000000 R14=ffff88806ce3ed28 R15=0000000000000001
RIP=ffffffff813865fb RFL=00000293 [--S-A-C] 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 000055555593a400 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=00007f95fb7db010 CR3=000000000eacc000 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 40e79e0000000000
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