syzkaller login: [ 31.100429] BUG: Bad rss-counter state mm:00000000c9ce57fa type:MM_FILEPAGES val:33 [ 31.101310] BUG: Bad rss-counter state mm:00000000c9ce57fa type:MM_ANONPAGES val:22 [ 31.226876] ================================================================== [ 31.227526] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.228085] Read of size 8 at addr ffff8880165cd4e0 by task sshd/219 [ 31.228594] [ 31.228738] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.229266] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.229906] Call Trace: [ 31.230104] <TASK> [ 31.230280] dump_stack_lvl+0x91/0xf0 [ 31.230591] print_report+0xcc/0x620 [ 31.230888] ? __virt_addr_valid+0x102/0x340 [ 31.231530] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.231942] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.232338] kasan_report+0xbe/0xf0 [ 31.232646] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.233035] vma_interval_tree_remove+0xc75/0xec0 [ 31.233432] vma_prepare+0xc54/0x11a0 [ 31.233750] __split_vma+0x5af/0x950 [ 31.234080] ? __pfx___split_vma+0x10/0x10 [ 31.234415] ? find_held_lock+0x2c/0x110 [ 31.234755] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.235131] ? lock_is_held_type+0x9f/0x120 [ 31.235491] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.235868] ? mtree_range_walk+0x632/0x900 [ 31.236210] ? mas_walk+0x5c7/0x7c0 [ 31.236510] do_vmi_munmap+0x1f1/0x2b0 [ 31.236818] mmap_region+0x1f9/0x2660 [ 31.237119] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.237443] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.237958] ? __pfx_lock_acquire+0x10/0x10 [ 31.238300] ? __pfx_mmap_region+0x10/0x10 [ 31.238620] ? security_mmap_addr+0x7d/0xa0 [ 31.238943] ? get_unmapped_area+0x1f5/0x3f0 [ 31.239285] do_mmap+0x854/0xf00 [ 31.239568] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.239878] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.240224] ksys_mmap_pgoff+0x3af/0x500 [ 31.240549] do_syscall_64+0x3f/0x90 [ 31.240860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.241286] RIP: 0033:0x7f8498ac7d82 [ 31.241563] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.242942] RSP: 002b:00007ffd84a716d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.243510] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8498ac7d82 [ 31.244039] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8497f01000 [ 31.244602] RBP: 00007f8497f01000 R08: 0000000000000009 R09: 0000000000001000 [ 31.245313] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bea3c48f70 [ 31.245900] R13: 00007ffd84a716f0 R14: 00007ffd84a71720 R15: 00007ffd84a71a80 [ 31.246439] </TASK> [ 31.246635] [ 31.246771] Allocated by task 212: [ 31.247039] kasan_save_stack+0x22/0x50 [ 31.247364] kasan_set_track+0x25/0x30 [ 31.247680] __kasan_slab_alloc+0x59/0x70 [ 31.248010] kmem_cache_alloc+0x16b/0x370 [ 31.248330] vm_area_dup+0x20/0x160 [ 31.248626] __split_vma+0x170/0x950 [ 31.248961] split_vma+0xc6/0x110 [ 31.249262] mprotect_fixup+0x8d2/0xb30 [ 31.249583] do_mprotect_pkey+0x87e/0xd40 [ 31.249967] __x64_sys_mprotect+0x78/0xc0 [ 31.250298] do_syscall_64+0x3f/0x90 [ 31.250603] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.251055] [ 31.251214] Freed by task 212: [ 31.251470] kasan_save_stack+0x22/0x50 [ 31.251802] kasan_set_track+0x25/0x30 [ 31.252125] kasan_save_free_info+0x2b/0x50 [ 31.252469] __kasan_slab_free+0x10a/0x190 [ 31.252802] kmem_cache_free+0x10d/0x4d0 [ 31.253128] rcu_core+0x8c8/0x2860 [ 31.253411] __do_softirq+0x1b7/0x7d4 [ 31.253754] [ 31.253935] Last potentially related work creation: [ 31.254363] kasan_save_stack+0x22/0x50 [ 31.254703] __kasan_record_aux_stack+0x8e/0xa0 [ 31.255065] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.255476] remove_vma+0x139/0x170 [ 31.255772] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.256136] do_vmi_munmap+0x1f1/0x2b0 [ 31.256479] __vm_munmap+0x138/0x3a0 [ 31.256790] __x64_sys_munmap+0x59/0x80 [ 31.257110] do_syscall_64+0x3f/0x90 [ 31.257440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.257875] [ 31.258027] The buggy address belongs to the object at ffff8880165cd488 [ 31.258027] which belongs to the cache vm_area_struct of size 168 [ 31.258949] The buggy address is located 88 bytes inside of [ 31.258949] freed 168-byte region [ffff8880165cd488, ffff8880165cd530) [ 31.259866] [ 31.260010] The buggy address belongs to the physical page: [ 31.260472] page:0000000054081554 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x165cd [ 31.261240] memcg:ffff88801833b801 [ 31.261537] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.262028] page_type: 0xffffffff() [ 31.262355] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.263003] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801833b801 [ 31.263570] page dumped because: kasan: bad access detected [ 31.263959] [ 31.264095] Memory state around the buggy address: [ 31.264473] ffff8880165cd380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.265059] ffff8880165cd400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.265631] >ffff8880165cd480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.266214] ^ [ 31.266689] ffff8880165cd500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.267197] ffff8880165cd580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.267710] ================================================================== [ 31.268356] Disabling lock debugging due to kernel taint [ 33.152659] BUG: Bad rss-counter state mm:00000000a90b23db type:MM_FILEPAGES val:33 [ 33.153626] BUG: Bad rss-counter state mm:00000000a90b23db type:MM_ANONPAGES val:22 [ 33.533838] BUG: Bad rss-counter state mm:00000000c0bb3c8b type:MM_FILEPAGES val:33 [ 33.534684] BUG: Bad rss-counter state mm:00000000c0bb3c8b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38984' (ECDSA) to the list of known hosts. 2023/06/21 08:32:00 fuzzer started 2023/06/21 08:32:00 dialing manager at localhost:36067 2023/06/21 08:32:00 checking machine... 2023/06/21 08:32:00 checking revisions... [ 34.126164] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:32:00 testing simple program... [ 34.163997] cgroup: Unknown subsys name 'net' [ 34.216641] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:32:00 Registers: info registers vcpu 0 RAX=ffffffff8615de88 RBX=0000000000000001 RCX=ffffffff81976418 RDX=0000000000000000 RSI=ffffffff8615de88 RDI=ffffffff85e16ac4 RBP=ffff88801010f4d0 RSP=ffff88801010f400 R8 =ffffffff8615de88 R9 =ffff88801010f4b8 R10=0000000000038001 R11=0000000000027040 R12=ffff88801010f4d8 R13=ffff88801010f4c0 R14=ffff88801010f4b9 R15=ffff88801010f478 RIP=ffffffff8112fcc1 RFL=00000282 [--S----] 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 00007fcc24d59700 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=00007ff7288440b0 CR3=000000000fd58000 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 XMM00=2039353a31333a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a31333a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8118b640 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888008e0d1c0 RSI=ffffffff8121b38c RDI=0000000000000001 RBP=ffff8880087a63a0 RSP=ffff888008e37ec8 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=0000000000000000 R12=ffffffff854e8ec0 R13=ffff8880087a63a4 R14=ffff888008e0d1c0 R15=0000000000000001 RIP=ffffffff8118b644 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=00007ff87dc85b50 CR3=000000000ca52000 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 XMM00=00000000000000000000000000000000 XMM01=a85bf7d8b07a38982645b1f973c65fb9 XMM02=000000000011aab8eff9b2d0a8fce9cb XMM03=000000000011ab882c67c8bc2e329bc3 XMM04=61d61ff070035ca500000000000ae988 XMM05=dfcdbad4f1609c370000000000131700 XMM06=db72a43c1a92ffaa0000000000130568 XMM07=e042d86d42eb936e0000000000121ba8 XMM08=542051a4b39f92dd000000000011ab88 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000