Debian GNU/Linux 11 syzkaller ttyS0
Warning: Permanently added '[localhost]:37461' (ECDSA) to the list of known hosts.
2021/12/06 11:39:47 fuzzer started
2021/12/06 11:39:47 dialing manager at localhost:35719
2021/12/06 11:39:48 checking machine...
2021/12/06 11:39:48 checking revisions...
syzkaller login: [ 28.120890] kmemleak: Automatic memory scanning thread ended
2021/12/06 11:39:48 testing simple program...
[ 28.165152] cgroup: Unknown subsys name 'net'
[ 28.166328] cgroup: Unknown subsys name 'net_prio'
[ 28.167587] cgroup: Unknown subsys name 'devices'
[ 28.168903] cgroup: Unknown subsys name 'blkio'
[ 28.191628]
[ 28.191986] =========================
[ 28.192720] WARNING: held lock freed!
[ 28.193464] 5.16.0-rc3-next-20211203 #1 Not tainted
[ 28.194618] -------------------------
[ 28.195832] kworker/0:1/10 is freeing memory ffff8880081cd800-ffff8880081cd9ff, with a lock still held there!
[ 28.198179] ffff8880081cd948 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 28.199912] 3 locks held by kworker/0:1/10:
[ 28.200755] #0: ffff8880080a6138 ((wq_completion)cgroup_destroy){+.+.}-{0:0}, at: process_one_work+0x929/0x1710
[ 28.202777] #1: ffff888008197da8 ((work_completion)(&(&css->destroy_rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x95d/0x1710
[ 28.205128] #2: ffff8880081cd948 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 28.206964]
[ 28.206964] stack backtrace:
[ 28.207830] CPU: 0 PID: 10 Comm: kworker/0:1 Not tainted 5.16.0-rc3-next-20211203 #1
[ 28.209382] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 28.211653] Workqueue: cgroup_destroy css_free_rwork_fn
[ 28.212715] Call Trace:
[ 28.213232]
[ 28.213668] dump_stack_lvl+0x8b/0xb3
[ 28.214436] debug_check_no_locks_freed.cold+0xa5/0xb1
[ 28.215463] ? kernfs_put.part.0+0x334/0x540
[ 28.216310] kfree+0xb3/0x5a0
[ 28.216935] ? kmem_cache_free+0xce/0x640
[ 28.217734] kernfs_put.part.0+0x334/0x540
[ 28.218552] kernfs_put+0x42/0x50
[ 28.219208] __kernfs_remove+0x7ce/0xb00
[ 28.219989] ? lock_is_held_type+0xd7/0x130
[ 28.220848] ? kernfs_next_descendant_post+0x2f0/0x2f0
[ 28.221853] ? down_write+0xde/0x150
[ 28.222568] ? down_write_killable_nested+0x180/0x180
[ 28.223557] kernfs_destroy_root+0x89/0xb0
[ 28.224366] css_free_rwork_fn+0xa28/0xf40
[ 28.225193] process_one_work+0xa30/0x1710
[ 28.226014] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 28.226921] ? rwlock_bug.part.0+0x90/0x90
[ 28.227746] ? _raw_spin_lock_irq+0x41/0x50
[ 28.228772] worker_thread+0x62a/0x13e0
[ 28.229560] ? process_one_work+0x1710/0x1710
[ 28.230433] kthread+0x40c/0x500
[ 28.231095] ? set_kthread_struct+0x130/0x130
[ 28.231963] ret_from_fork+0x22/0x30
[ 28.232704]
[ 28.233278] ==================================================================
[ 28.234694] BUG: KASAN: use-after-free in up_write+0x3ac/0x460
[ 28.235856] Read of size 8 at addr ffff8880081cd940 by task kworker/0:1/10
[ 28.237232]
[ 28.237548] CPU: 0 PID: 10 Comm: kworker/0:1 Not tainted 5.16.0-rc3-next-20211203 #1
[ 28.239059] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 28.241316] Workqueue: cgroup_destroy css_free_rwork_fn
[ 28.242389] Call Trace:
[ 28.242891]
[ 28.243330] dump_stack_lvl+0x8b/0xb3
[ 28.244076] print_address_description.constprop.0+0x1f/0x180
[ 28.245243] ? up_write+0x3ac/0x460
[ 28.245947] ? up_write+0x3ac/0x460
[ 28.246650] kasan_report.cold+0x7f/0x11b
[ 28.247443] ? up_write+0x3ac/0x460
[ 28.248135] up_write+0x3ac/0x460
[ 28.248804] css_free_rwork_fn+0xa28/0xf40
[ 28.249612] process_one_work+0xa30/0x1710
[ 28.250415] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 28.251306] ? rwlock_bug.part.0+0x90/0x90
[ 28.252112] ? _raw_spin_lock_irq+0x41/0x50
[ 28.252954] worker_thread+0x62a/0x13e0
[ 28.253724] ? process_one_work+0x1710/0x1710
[ 28.254582] kthread+0x40c/0x500
[ 28.255228] ? set_kthread_struct+0x130/0x130
[ 28.256088] ret_from_fork+0x22/0x30
[ 28.256816]
[ 28.257252]
[ 28.257563] Allocated by task 279:
[ 28.258226] kasan_save_stack+0x1e/0x40
[ 28.258991] __kasan_kmalloc+0x81/0xa0
[ 28.259731] kernfs_create_root+0x4c/0x410
[ 28.260540] cgroup_setup_root+0x346/0xb60
[ 28.261372] cgroup1_get_tree+0xc1b/0x1370
[ 28.262190] vfs_get_tree+0x8e/0x2f0
[ 28.262903] path_mount+0x131b/0x1f80
[ 28.263634] __x64_sys_mount+0x27e/0x300
[ 28.264425] do_syscall_64+0x3b/0x90
[ 28.265149] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 28.266131]
[ 28.266443] Freed by task 10:
[ 28.267031] kasan_save_stack+0x1e/0x40
[ 28.267787] kasan_set_track+0x21/0x30
[ 28.268524] kasan_set_free_info+0x20/0x30
[ 28.269351] __kasan_slab_free+0x108/0x170
[ 28.270150] kfree+0xc5/0x5a0
[ 28.270744] kernfs_put.part.0+0x334/0x540
[ 28.271558] kernfs_put+0x42/0x50
[ 28.272219] __kernfs_remove+0x7ce/0xb00
[ 28.273011] kernfs_destroy_root+0x89/0xb0
[ 28.273817] css_free_rwork_fn+0xa28/0xf40
[ 28.274629] process_one_work+0xa30/0x1710
[ 28.275436] worker_thread+0x62a/0x13e0
[ 28.276196] kthread+0x40c/0x500
[ 28.276860] ret_from_fork+0x22/0x30
[ 28.277566]
[ 28.277872] The buggy address belongs to the object at ffff8880081cd800
[ 28.277872] which belongs to the cache kmalloc-512 of size 512
[ 28.280211] The buggy address is located 320 bytes inside of
[ 28.280211] 512-byte region [ffff8880081cd800, ffff8880081cda00)
[ 28.282429] The buggy address belongs to the page:
[ 28.283344] page:0000000021712ae0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x81cc
[ 28.285128] head:0000000021712ae0 order:2 compound_mapcount:0 compound_pincount:0
[ 28.286571] flags: 0x100000000010200(slab|head|node=0|zone=1)
[ 28.287701] raw: 0100000000010200 0000000000000000 dead000000000001 ffff888007841c80
[ 28.289197] raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
[ 28.290681] page dumped because: kasan: bad access detected
[ 28.291738]
[ 28.292041] Memory state around the buggy address:
[ 28.292972] ffff8880081cd800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.294346] ffff8880081cd880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.295717] >ffff8880081cd900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.297101] ^
[ 28.298122] ffff8880081cd980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.299495] ffff8880081cda00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 28.300881] ==================================================================
[ 28.321670] cgroup: Unknown subsys name 'hugetlb'
[ 28.323181] cgroup: Unknown subsys name 'rlimit'
executing program
executing program
executing program
VM DIAGNOSIS:
11:39:48 Registers:
info registers vcpu 0
RAX=000000000000005d RBX=00000000000003f8 RCX=0000000000000000 RDX=00000000000003f8
RSI=ffffffff823640e1 RDI=ffffffff87381a60 RBP=ffffffff87381a20 RSP=ffff888008197648
R8 =0000000000000000 R9 =000000000000005d R10=ffffffff82365d23 R11=000000000000000a
R12=000000000000005d R13=000000000000005d 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=00007fc2dd10a790 CR3=0000000017aa4000 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 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
info registers vcpu 1
RAX=dffffc0000000000 RBX=1ffff110030e3efc RCX=1ffff110030e3f19 RDX=1ffff110030e3f18
RSI=ffff88801871fec8 RDI=ffff88801871fec8 RBP=0000000000000001 RSP=ffff88801871f798
R8 =ffffffff85c5876a R9 =ffffffff85c5876e R10=ffffed10030e3f1c R11=0000000000034044
R12=ffff88801871fef8 R13=ffff88801871f8c8 R14=ffff88801871f878 R15=ffff88801871f8b8
RIP=ffffffff81115712 RFL=00000246 [---Z-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 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=00007fbecb0cb260 CR3=0000000017aa4000 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=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 756e696c2d34365f 3638782f62696c2f
YMM01=0000000000000000 0000000000000000 2e6f732e6d617062 696c2f756e672d78
YMM02=0000000000000000 0000000000000000 00302e6f732e6d61 7062696c2f756e67
YMM03=0000000000000000 0000000000000000 2d78756e696c2d34 365f3638782f6269
YMM04=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM05=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM06=0000000000000000 0000000000000000 0000000000000000 0000000000000000
YMM07=0000000000000000 0000000000000000 0000000000000000 0000000000000000
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