Debian GNU/Linux 11 syzkaller ttyS0
Warning: Permanently added '[localhost]:24536' (ECDSA) to the list of known hosts.
2021/12/06 11:23:33 fuzzer started
2021/12/06 11:23:34 dialing manager at localhost:35719
2021/12/06 11:23:34 checking machine...
2021/12/06 11:23:34 checking revisions...
syzkaller login: [ 36.275603] kmemleak: Automatic memory scanning thread ended
2021/12/06 11:23:34 testing simple program...
[ 36.316102] cgroup: Unknown subsys name 'net'
[ 36.317113] cgroup: Unknown subsys name 'net_prio'
[ 36.318981] cgroup: Unknown subsys name 'devices'
[ 36.320017] cgroup: Unknown subsys name 'blkio'
[ 36.361622]
[ 36.361906] =========================
[ 36.362411] WARNING: held lock freed!
[ 36.362863] 5.16.0-rc3-next-20211203 #1 Not tainted
[ 36.363498] -------------------------
[ 36.364038] kworker/1:2/47 is freeing memory ffff88800d79b800-ffff88800d79b9ff, with a lock still held there!
[ 36.365409] ffff88800d79b948 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 36.366498] 3 locks held by kworker/1:2/47:
[ 36.367022] #0: ffff8880080a6138 ((wq_completion)cgroup_destroy){+.+.}-{0:0}, at: process_one_work+0x929/0x1710
[ 36.368341] #1: ffff88800b5dfda8 ((work_completion)(&(&css->destroy_rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x95d/0x1710
[ 36.369824] #2: ffff88800d79b948 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 36.370951]
[ 36.370951] stack backtrace:
[ 36.371485] CPU: 1 PID: 47 Comm: kworker/1:2 Not tainted 5.16.0-rc3-next-20211203 #1
[ 36.372514] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 36.373873] Workqueue: cgroup_destroy css_free_rwork_fn
[ 36.374534] Call Trace:
[ 36.374847] <TASK>
[ 36.375128] dump_stack_lvl+0x8b/0xb3
[ 36.375650] debug_check_no_locks_freed.cold+0xa5/0xb1
[ 36.380183] ? kernfs_put.part.0+0x334/0x540
[ 36.380730] kfree+0xb3/0x5a0
[ 36.381117] ? kmem_cache_free+0xce/0x640
[ 36.381668] kernfs_put.part.0+0x334/0x540
[ 36.382212] kernfs_put+0x42/0x50
[ 36.382650] __kernfs_remove+0x7ce/0xb00
[ 36.383148] ? lock_is_held_type+0xd7/0x130
[ 36.383697] ? kernfs_next_descendant_post+0x2f0/0x2f0
[ 36.384348] ? down_write+0xde/0x150
[ 36.384803] ? down_write_killable_nested+0x180/0x180
[ 36.385473] kernfs_destroy_root+0x89/0xb0
[ 36.385991] css_free_rwork_fn+0xa28/0xf40
[ 36.386561] process_one_work+0xa30/0x1710
[ 36.387085] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 36.387707] ? rwlock_bug.part.0+0x90/0x90
[ 36.388225] ? _raw_spin_lock_irq+0x41/0x50
[ 36.388757] worker_thread+0x62a/0x13e0
[ 36.389267] ? process_one_work+0x1710/0x1710
[ 36.389852] kthread+0x40c/0x500
[ 36.390269] ? set_kthread_struct+0x130/0x130
[ 36.390823] ret_from_fork+0x22/0x30
[ 36.391313] </TASK>
[ 36.395204] ==================================================================
[ 36.399542] BUG: KASAN: use-after-free in up_write+0x3ac/0x460
[ 36.403536] Read of size 8 at addr ffff88800d79b940 by task kworker/1:2/47
[ 36.404404]
[ 36.404609] CPU: 1 PID: 47 Comm: kworker/1:2 Not tainted 5.16.0-rc3-next-20211203 #1
[ 36.405557] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 36.407026] Workqueue: cgroup_destroy css_free_rwork_fn
[ 36.407709] Call Trace:
[ 36.408019] <TASK>
[ 36.411179] dump_stack_lvl+0x8b/0xb3
[ 36.411691] print_address_description.constprop.0+0x1f/0x180
[ 36.412416] ? up_write+0x3ac/0x460
[ 36.412864] ? up_write+0x3ac/0x460
[ 36.413305] kasan_report.cold+0x7f/0x11b
[ 36.413818] ? up_write+0x3ac/0x460
[ 36.414264] up_write+0x3ac/0x460
[ 36.414701] css_free_rwork_fn+0xa28/0xf40
[ 36.415340] process_one_work+0xa30/0x1710
[ 36.419379] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 36.420021] ? rwlock_bug.part.0+0x90/0x90
[ 36.420958] ? _raw_spin_lock_irq+0x41/0x50
[ 36.421583] worker_thread+0x62a/0x13e0
[ 36.422172] ? process_one_work+0x1710/0x1710
[ 36.422922] kthread+0x40c/0x500
[ 36.423421] ? set_kthread_struct+0x130/0x130
[ 36.424206] ret_from_fork+0x22/0x30
[ 36.424724] </TASK>
[ 36.425034]
[ 36.425255] Allocated by task 280:
[ 36.425722] kasan_save_stack+0x1e/0x40
[ 36.426258] __kasan_kmalloc+0x81/0xa0
[ 36.426801] kernfs_create_root+0x4c/0x410
[ 36.427361] cgroup_setup_root+0x346/0xb60
[ 36.427951] cgroup1_get_tree+0xc1b/0x1370
[ 36.428531] vfs_get_tree+0x8e/0x2f0
[ 36.429040] path_mount+0x131b/0x1f80
[ 36.429554] __x64_sys_mount+0x27e/0x300
[ 36.430098] do_syscall_64+0x3b/0x90
[ 36.430597] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 36.431291]
[ 36.431516] Freed by task 47:
[ 36.431937] kasan_save_stack+0x1e/0x40
[ 36.432463] kasan_set_track+0x21/0x30
[ 36.432980] kasan_set_free_info+0x20/0x30
[ 36.433567] __kasan_slab_free+0x108/0x170
[ 36.434132] kfree+0xc5/0x5a0
[ 36.434584] kernfs_put.part.0+0x334/0x540
[ 36.435150] kernfs_put+0x42/0x50
[ 36.435628] __kernfs_remove+0x7ce/0xb00
[ 36.436165] kernfs_destroy_root+0x89/0xb0
[ 36.436741] css_free_rwork_fn+0xa28/0xf40
[ 36.437306] process_one_work+0xa30/0x1710
[ 36.437875] worker_thread+0x62a/0x13e0
[ 36.438408] kthread+0x40c/0x500
[ 36.438852] ret_from_fork+0x22/0x30
[ 36.439346]
[ 36.439565] The buggy address belongs to the object at ffff88800d79b800
[ 36.439565] which belongs to the cache kmalloc-512 of size 512
[ 36.441189] The buggy address is located 320 bytes inside of
[ 36.441189] 512-byte region [ffff88800d79b800, ffff88800d79ba00)
[ 36.442740] The buggy address belongs to the page:
[ 36.443380] page:0000000033e62d87 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd798
[ 36.444687] head:0000000033e62d87 order:2 compound_mapcount:0 compound_pincount:0
[ 36.445719] flags: 0x100000000010200(slab|head|node=0|zone=1)
[ 36.446521] raw: 0100000000010200 0000000000000000 dead000000000001 ffff888007841c80
[ 36.447538] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
[ 36.448635] page dumped because: kasan: bad access detected
[ 36.449404]
[ 36.449623] Memory state around the buggy address:
[ 36.450258] ffff88800d79b800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 36.451269] ffff88800d79b880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 36.452257] >ffff88800d79b900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 36.453242] ^
[ 36.453926] ffff88800d79b980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 36.454808] ffff88800d79ba00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 36.455734] ==================================================================
[ 36.478116] cgroup: Unknown subsys name 'hugetlb'
[ 36.479845] cgroup: Unknown subsys name 'rlimit'
executing program
executing program
executing program
VM DIAGNOSIS:
11:23:34 Registers:
info registers vcpu 0
RAX=ffff88801cddc454 RBX=dffffc0000000000 RCX=0000000000000004 RDX=0000000000000000
RSI=ffffffff819d7395 RDI=ffff88801cddc440 RBP=ffff88801cddc440 RSP=ffff8880185bf830
R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff819dd4bf R11=0000000000000000
R12=ffff88800c5a1910 R13=ffff88800f60e4d8 R14=0000000000000000 R15=ffff88801cddc440
RIP=ffffffff820e81f5 RFL=00000296 [--S-AP-] 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 00005555561ca400 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=0000561d69b1399e CR3=000000001cc06000 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 413ede4bc1689726
YMM01=0000000000000000 0000000000000000 0000000000000000 3f847ae147ae147b
YMM02=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM03=0000000000000000 0000000000000000 0000000000000000 3f753cf7750a14e9
YMM04=0000000000000000 0000000000000000 00007f7b9ec8f700 0000000000415710
YMM05=0000000000000000 0000000000000000 0000000000000000 000000c0000a6d08
YMM06=0000000000000000 0000000000000000 0000000000505007 000000c00015d7c0
YMM07=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM08=0000000000000000 0000000000000000 000000c0000a70e8 0000000000000000
YMM09=0000000000000000 0000000000000000 00000000004643c1 0000000000000000
YMM10=0000000000000000 0000000000000000 000000c0004f2440 000000c000154b00
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=dffffc0000000060 RBX=00000000000003fd RCX=0000000000000000 RDX=00000000000003fd
RSI=ffffffff8236405c RDI=ffffffff87381a60 RBP=ffffffff87381a20 RSP=ffff88800b5df668
R8 =000000000000002e R9 =0000000000000073 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 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=00007f2f75f54000 CR3=000000001b336000 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 40ee5e0000000000
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