Debian GNU/Linux 11 syzkaller ttyS0
Warning: Permanently added '[localhost]:4760' (ECDSA) to the list of known hosts.
2021/12/06 11:35:32 fuzzer started
2021/12/06 11:35:33 dialing manager at localhost:35719
2021/12/06 11:35:33 checking machine...
2021/12/06 11:35:33 checking revisions...
syzkaller login: [ 27.979833] kmemleak: Automatic memory scanning thread ended
2021/12/06 11:35:33 testing simple program...
[ 28.018859] cgroup: Unknown subsys name 'net'
[ 28.020282] cgroup: Unknown subsys name 'net_prio'
[ 28.022401] cgroup: Unknown subsys name 'devices'
[ 28.023818] cgroup: Unknown subsys name 'blkio'
[ 28.050745]
[ 28.051155] =========================
[ 28.052040] WARNING: held lock freed!
[ 28.052924] 5.16.0-rc3-next-20211203 #1 Not tainted
[ 28.054794] -------------------------
[ 28.055990] kworker/0:1/10 is freeing memory ffff88800e7f1800-ffff88800e7f19ff, with a lock still held there!
[ 28.057938] ffff88800e7f1948 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 28.059694] 3 locks held by kworker/0:1/10:
[ 28.060544] #0: ffff8880080a6138 ((wq_completion)cgroup_destroy){+.+.}-{0:0}, at: process_one_work+0x929/0x1710
[ 28.062582] #1: ffff888008197da8 ((work_completion)(&(&css->destroy_rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x95d/0x1710
[ 28.064883] #2: ffff88800e7f1948 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 28.066712]
[ 28.066712] stack backtrace:
[ 28.067571] CPU: 0 PID: 10 Comm: kworker/0:1 Not tainted 5.16.0-rc3-next-20211203 #1
[ 28.069085] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 28.071305] Workqueue: cgroup_destroy css_free_rwork_fn
[ 28.072356] Call Trace:
[ 28.072853]
[ 28.073288] dump_stack_lvl+0x8b/0xb3
[ 28.074057] debug_check_no_locks_freed.cold+0xa5/0xb1
[ 28.075108] ? kernfs_put.part.0+0x334/0x540
[ 28.075972] kfree+0xb3/0x5a0
[ 28.076588] ? kmem_cache_free+0xce/0x640
[ 28.077404] kernfs_put.part.0+0x334/0x540
[ 28.078247] kernfs_put+0x42/0x50
[ 28.078928] __kernfs_remove+0x7ce/0xb00
[ 28.079734] ? lock_is_held_type+0xd7/0x130
[ 28.080588] ? kernfs_next_descendant_post+0x2f0/0x2f0
[ 28.081605] ? down_write+0xde/0x150
[ 28.082340] ? down_write_killable_nested+0x180/0x180
[ 28.083344] kernfs_destroy_root+0x89/0xb0
[ 28.084164] css_free_rwork_fn+0xa28/0xf40
[ 28.084994] process_one_work+0xa30/0x1710
[ 28.085819] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 28.086735] ? rwlock_bug.part.0+0x90/0x90
[ 28.087555] ? _raw_spin_lock_irq+0x41/0x50
[ 28.088401] worker_thread+0x62a/0x13e0
[ 28.089180] ? process_one_work+0x1710/0x1710
[ 28.090078] kthread+0x40c/0x500
[ 28.090740] ? set_kthread_struct+0x130/0x130
[ 28.091620] ret_from_fork+0x22/0x30
[ 28.092362]
[ 28.092873] ==================================================================
[ 28.094305] BUG: KASAN: use-after-free in up_write+0x3ac/0x460
[ 28.095452] Read of size 8 at addr ffff88800e7f1940 by task kworker/0:1/10
[ 28.096810]
[ 28.097132] CPU: 0 PID: 10 Comm: kworker/0:1 Not tainted 5.16.0-rc3-next-20211203 #1
[ 28.098705] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 28.100945] Workqueue: cgroup_destroy css_free_rwork_fn
[ 28.102014] Call Trace:
[ 28.102527]
[ 28.102965] dump_stack_lvl+0x8b/0xb3
[ 28.103725] print_address_description.constprop.0+0x1f/0x180
[ 28.104872] ? up_write+0x3ac/0x460
[ 28.105588] ? up_write+0x3ac/0x460
[ 28.106316] kasan_report.cold+0x7f/0x11b
[ 28.107150] ? up_write+0x3ac/0x460
[ 28.107868] up_write+0x3ac/0x460
[ 28.108558] css_free_rwork_fn+0xa28/0xf40
[ 28.109401] process_one_work+0xa30/0x1710
[ 28.110262] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 28.111189] ? rwlock_bug.part.0+0x90/0x90
[ 28.112037] ? _raw_spin_lock_irq+0x41/0x50
[ 28.112883] worker_thread+0x62a/0x13e0
[ 28.113684] ? process_one_work+0x1710/0x1710
[ 28.114589] kthread+0x40c/0x500
[ 28.115264] ? set_kthread_struct+0x130/0x130
[ 28.116152] ret_from_fork+0x22/0x30
[ 28.116896]
[ 28.117356]
[ 28.117676] Allocated by task 279:
[ 28.118378] kasan_save_stack+0x1e/0x40
[ 28.119165] __kasan_kmalloc+0x81/0xa0
[ 28.119939] kernfs_create_root+0x4c/0x410
[ 28.120769] cgroup_setup_root+0x346/0xb60
[ 28.121610] cgroup1_get_tree+0xc1b/0x1370
[ 28.122459] vfs_get_tree+0x8e/0x2f0
[ 28.123200] path_mount+0x131b/0x1f80
[ 28.123953] __x64_sys_mount+0x27e/0x300
[ 28.124751] do_syscall_64+0x3b/0x90
[ 28.125483] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 28.126514]
[ 28.126833] Freed by task 10:
[ 28.127445] kasan_save_stack+0x1e/0x40
[ 28.128228] kasan_set_track+0x21/0x30
[ 28.128985] kasan_set_free_info+0x20/0x30
[ 28.129822] __kasan_slab_free+0x108/0x170
[ 28.130673] kfree+0xc5/0x5a0
[ 28.131287] kernfs_put.part.0+0x334/0x540
[ 28.132132] kernfs_put+0x42/0x50
[ 28.132819] __kernfs_remove+0x7ce/0xb00
[ 28.133616] kernfs_destroy_root+0x89/0xb0
[ 28.134455] css_free_rwork_fn+0xa28/0xf40
[ 28.135293] process_one_work+0xa30/0x1710
[ 28.136123] worker_thread+0x62a/0x13e0
[ 28.136900] kthread+0x40c/0x500
[ 28.137563] ret_from_fork+0x22/0x30
[ 28.138313]
[ 28.138630] The buggy address belongs to the object at ffff88800e7f1800
[ 28.138630] which belongs to the cache kmalloc-512 of size 512
[ 28.141046] The buggy address is located 320 bytes inside of
[ 28.141046] 512-byte region [ffff88800e7f1800, ffff88800e7f1a00)
[ 28.143319] The buggy address belongs to the page:
[ 28.144272] page:000000007a00457a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7f0
[ 28.146094] head:000000007a00457a order:2 compound_mapcount:0 compound_pincount:0
[ 28.147568] flags: 0x100000000010200(slab|head|node=0|zone=1)
[ 28.148721] raw: 0100000000010200 0000000000000000 dead000000000001 ffff888007841c80
[ 28.150250] raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
[ 28.151764] page dumped because: kasan: bad access detected
[ 28.152864]
[ 28.153180] Memory state around the buggy address:
[ 28.154142] ffff88800e7f1800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.155568] ffff88800e7f1880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.156987] >ffff88800e7f1900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.158416] ^
[ 28.159472] ffff88800e7f1980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.160899] ffff88800e7f1a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 28.162326] ==================================================================
[ 28.210053] cgroup: Unknown subsys name 'hugetlb'
[ 28.213066] cgroup: Unknown subsys name 'rlimit'
executing program
executing program
executing program
VM DIAGNOSIS:
11:35:33 Registers:
info registers vcpu 0
RAX=000000000000000a RBX=00000000000003f8 RCX=0000000000000000 RDX=00000000000003f8
RSI=ffffffff823640e1 RDI=ffffffff87381a60 RBP=ffffffff87381a20 RSP=ffff888008197648
R8 =0000000000000000 R9 =000000000000000a R10=ffffffff82365d23 R11=000000000000000a
R12=000000000000000a R13=000000000000000a 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=00007f0ce8d956d0 CR3=000000000e49c000 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 2525252525252525 2525252525252525
YMM01=0000000000000000 0000000000000000 0000000000ff0000 00000000000000ff
YMM02=0000000000000000 0000000000000000 0000000000ff0000 00000000000000ff
YMM03=0000000000000000 0000000000000000 206c616e6f697469 646e6f63093a6863
YMM04=0000000000000000 0000000000000000 6c6c615f73757043 0a33093a6465776f
YMM05=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM06=0000000000000000 0000000000000000 206c615f6f697043 0a33093a093a6863
YMM07=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM08=0000000000000000 0000000000000000 636f72702f006469 6e6f697373657300
YMM09=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM10=0000000000000000 0000000000000000 2020000000002020 2020202020200000
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=ffffffff8174137e RBX=ffffffff813257a0 RCX=0000000000000000 RDX=1ffff11002f8cf72
RSI=ffffffff8174137e RDI=ffff888017c67c00 RBP=ffff888017c67bd0 RSP=ffff888017c67b30
R8 =ffffffff85c77dcc R9 =ffffffff85c77dd0 R10=ffffed1002f8cf74 R11=0000000000034044
R12=ffff888017c67c00 R13=0000000000000000 R14=ffff888015989ac0 R15=ffff8880096c0580
RIP=ffffffff813257a0 RFL=00000286 [--S--P-] 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 00005555555a5400 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=000055a403571220 CR3=000000001819a000 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 bfe62e42fefa39ef
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