Debian GNU/Linux 11 syzkaller ttyS0
Warning: Permanently added '[localhost]:37951' (ECDSA) to the list of known hosts.
2021/12/06 11:26:21 fuzzer started
2021/12/06 11:26:22 dialing manager at localhost:35719
2021/12/06 11:26:22 checking machine...
2021/12/06 11:26:22 checking revisions...
syzkaller login: [ 29.723458] kmemleak: Automatic memory scanning thread ended
2021/12/06 11:26:22 testing simple program...
[ 29.770624] cgroup: Unknown subsys name 'net'
[ 29.772906] cgroup: Unknown subsys name 'net_prio'
[ 29.774656] cgroup: Unknown subsys name 'devices'
[ 29.776724] cgroup: Unknown subsys name 'blkio'
[ 29.801379]
[ 29.801798] =========================
[ 29.802613] WARNING: held lock freed!
[ 29.803421] 5.16.0-rc3-next-20211203 #1 Not tainted
[ 29.804615] -------------------------
[ 29.805864] kworker/1:2/121 is freeing memory ffff88800d522c00-ffff88800d522dff, with a lock still held there!
[ 29.808336] ffff88800d522d48 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 29.810277] 3 locks held by kworker/1:2/121:
[ 29.811199] #0: ffff8880080a6138 ((wq_completion)cgroup_destroy){+.+.}-{0:0}, at: process_one_work+0x929/0x1710
[ 29.813409] #1: ffff88800dde7da8 ((work_completion)(&(&css->destroy_rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x95d/0x1710
[ 29.815890] #2: ffff88800d522d48 (&root->kernfs_rwsem){++++}-{3:3}, at: __kernfs_remove+0x627/0xb00
[ 29.817934]
[ 29.817934] stack backtrace:
[ 29.818983] CPU: 1 PID: 121 Comm: kworker/1:2 Not tainted 5.16.0-rc3-next-20211203 #1
[ 29.820629] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 29.823032] Workqueue: cgroup_destroy css_free_rwork_fn
[ 29.824153] Call Trace:
[ 29.824692]
[ 29.825168] dump_stack_lvl+0x8b/0xb3
[ 29.825969] debug_check_no_locks_freed.cold+0xa5/0xb1
[ 29.827092] ? kernfs_put.part.0+0x334/0x540
[ 29.828041] kfree+0xb3/0x5a0
[ 29.828713] ? kmem_cache_free+0xce/0x640
[ 29.829607] kernfs_put.part.0+0x334/0x540
[ 29.830518] kernfs_put+0x42/0x50
[ 29.831256] __kernfs_remove+0x7ce/0xb00
[ 29.832111] ? lock_is_held_type+0xd7/0x130
[ 29.833020] ? kernfs_next_descendant_post+0x2f0/0x2f0
[ 29.834170] ? down_write+0xde/0x150
[ 29.834966] ? down_write_killable_nested+0x180/0x180
[ 29.836056] kernfs_destroy_root+0x89/0xb0
[ 29.836944] css_free_rwork_fn+0xa28/0xf40
[ 29.837848] process_one_work+0xa30/0x1710
[ 29.838748] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 29.839726] ? rwlock_bug.part.0+0x90/0x90
[ 29.840613] ? _raw_spin_lock_irq+0x41/0x50
[ 29.841547] worker_thread+0x62a/0x13e0
[ 29.842389] ? process_one_work+0x1710/0x1710
[ 29.843333] kthread+0x40c/0x500
[ 29.844044] ? set_kthread_struct+0x130/0x130
[ 29.844982] ret_from_fork+0x22/0x30
[ 29.845772]
[ 29.846461] ==================================================================
[ 29.847978] BUG: KASAN: use-after-free in up_write+0x3ac/0x460
[ 29.849240] Read of size 8 at addr ffff88800d522d40 by task kworker/1:2/121
[ 29.850705]
[ 29.851047] CPU: 1 PID: 121 Comm: kworker/1:2 Not tainted 5.16.0-rc3-next-20211203 #1
[ 29.852696] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 29.855082] Workqueue: cgroup_destroy css_free_rwork_fn
[ 29.856192] Call Trace:
[ 29.856728]
[ 29.857213] dump_stack_lvl+0x8b/0xb3
[ 29.858060] print_address_description.constprop.0+0x1f/0x180
[ 29.859404] ? up_write+0x3ac/0x460
[ 29.860224] ? up_write+0x3ac/0x460
[ 29.860990] kasan_report.cold+0x7f/0x11b
[ 29.861898] ? up_write+0x3ac/0x460
[ 29.862744] up_write+0x3ac/0x460
[ 29.863490] css_free_rwork_fn+0xa28/0xf40
[ 29.864391] process_one_work+0xa30/0x1710
[ 29.865299] ? pwq_dec_nr_in_flight+0x2a0/0x2a0
[ 29.866280] ? rwlock_bug.part.0+0x90/0x90
[ 29.867169] ? _raw_spin_lock_irq+0x41/0x50
[ 29.868089] worker_thread+0x62a/0x13e0
[ 29.868938] ? process_one_work+0x1710/0x1710
[ 29.869906] kthread+0x40c/0x500
[ 29.870613] ? set_kthread_struct+0x130/0x130
[ 29.871560] ret_from_fork+0x22/0x30
[ 29.872355]
[ 29.872837]
[ 29.873203] Allocated by task 282:
[ 29.873940] kasan_save_stack+0x1e/0x40
[ 29.874787] __kasan_kmalloc+0x81/0xa0
[ 29.875603] kernfs_create_root+0x4c/0x410
[ 29.876496] cgroup_setup_root+0x346/0xb60
[ 29.877390] cgroup1_get_tree+0xc1b/0x1370
[ 29.878284] vfs_get_tree+0x8e/0x2f0
[ 29.879069] path_mount+0x131b/0x1f80
[ 29.879866] __x64_sys_mount+0x27e/0x300
[ 29.880720] do_syscall_64+0x3b/0x90
[ 29.881502] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 29.882593]
[ 29.882933] Freed by task 121:
[ 29.883604] kasan_save_stack+0x1e/0x40
[ 29.884463] kasan_set_track+0x21/0x30
[ 29.885308] kasan_set_free_info+0x20/0x30
[ 29.886205] __kasan_slab_free+0x108/0x170
[ 29.887082] kfree+0xc5/0x5a0
[ 29.887737] kernfs_put.part.0+0x334/0x540
[ 29.888620] kernfs_put+0x42/0x50
[ 29.889343] __kernfs_remove+0x7ce/0xb00
[ 29.890188] kernfs_destroy_root+0x89/0xb0
[ 29.891073] css_free_rwork_fn+0xa28/0xf40
[ 29.891957] process_one_work+0xa30/0x1710
[ 29.892845] worker_thread+0x62a/0x13e0
[ 29.893676] kthread+0x40c/0x500
[ 29.894385] ret_from_fork+0x22/0x30
[ 29.895194]
[ 29.895533] The buggy address belongs to the object at ffff88800d522c00
[ 29.895533] which belongs to the cache kmalloc-512 of size 512
[ 29.898147] The buggy address is located 320 bytes inside of
[ 29.898147] 512-byte region [ffff88800d522c00, ffff88800d522e00)
[ 29.900574] The buggy address belongs to the page:
[ 29.901715] page:00000000a23c3207 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd520
[ 29.903665] head:00000000a23c3207 order:2 compound_mapcount:0 compound_pincount:0
[ 29.905244] flags: 0x100000000010200(slab|head|node=0|zone=1)
[ 29.906463] raw: 0100000000010200 0000000000000000 dead000000000001 ffff888007841c80
[ 29.908081] raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
[ 29.909720] page dumped because: kasan: bad access detected
[ 29.910890]
[ 29.911225] Memory state around the buggy address:
[ 29.912230] ffff88800d522c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 29.913738] ffff88800d522c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 29.915235] >ffff88800d522d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 29.916728] ^
[ 29.917884] ffff88800d522d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 29.919377] ffff88800d522e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 29.920893] ==================================================================
[ 29.967806] cgroup: Unknown subsys name 'hugetlb'
[ 29.969762] cgroup: Unknown subsys name 'rlimit'
executing program
executing program
executing program
VM DIAGNOSIS:
11:26:22 Registers:
info registers vcpu 0
RAX=ffffffff84078af0 RBX=ffffffff85032600 RCX=ffffffff8405abe1 RDX=ffffed100d9c7143
RSI=0000000000000001 RDI=ffffffff84078eaf RBP=0000000000000000 RSP=ffffffff85007e40
R8 =0000000000000000 R9 =ffff88806ce38a13 R10=ffffed100d9c7142 R11=0000000000000001
R12=fffffbfff0a064c0 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 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=00007f3b453e7c80 CR3=000000001818c000 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=dffffc0000000060 RBX=00000000000003fd RCX=0000000000000000 RDX=00000000000003fd
RSI=ffffffff8236405c RDI=ffffffff87381a60 RBP=ffffffff87381a20 RSP=ffff88800dde75f0
R8 =0000000000000072 R9 =000000000000005d 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=00007fff2fcde000 CR3=000000000d680000 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 2525252525252525 2525252525252525
YMM01=0000000000000000 0000000000000000 0000000000ff0000 00000000000000ff
YMM02=0000000000000000 0000000000000000 0000000000ff0000 00000000000000ff
YMM03=0000000000000000 0000000000000000 375afdebbf381c81 00000000000e5e68
YMM04=0000000000000000 0000000000000000 20bbff2373988c13 000000000012c3c0
YMM05=0000000000000000 0000000000000000 d3fdd5f48436fbd7 00000000000aeac8
YMM06=0000000000000000 0000000000000000 036fcd80bcbc4fbb 00000000000ae980
YMM07=0000000000000000 0000000000000000 a1fcdcf819d7e1e5 00000000000ae728
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