syzkaller login: [ 31.191691] BUG: Bad rss-counter state mm:00000000f96b6126 type:MM_FILEPAGES val:33 [ 31.192734] BUG: Bad rss-counter state mm:00000000f96b6126 type:MM_ANONPAGES val:22 [ 31.359201] ================================================================== [ 31.360279] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.361389] Read of size 8 at addr ffff88800f2a3140 by task sshd/221 [ 31.362475] [ 31.362684] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.363489] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.364421] Call Trace: [ 31.364722] [ 31.364993] dump_stack_lvl+0x91/0xf0 [ 31.365458] print_report+0xcc/0x620 [ 31.365914] ? __virt_addr_valid+0x102/0x340 [ 31.366447] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.367024] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.367608] kasan_report+0xbe/0xf0 [ 31.368062] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.368656] vma_interval_tree_remove+0xc75/0xec0 [ 31.369227] vma_prepare+0xc54/0x11a0 [ 31.369701] __split_vma+0x5af/0x950 [ 31.370168] ? __pfx___split_vma+0x10/0x10 [ 31.370702] ? find_held_lock+0x2c/0x110 [ 31.371225] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.371786] ? lock_is_held_type+0x9f/0x120 [ 31.372319] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.372922] ? mtree_range_walk+0x632/0x900 [ 31.373473] ? mas_walk+0x5c7/0x7c0 [ 31.373958] do_vmi_munmap+0x1f1/0x2b0 [ 31.374468] mmap_region+0x1f9/0x2660 [ 31.374946] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.375455] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.376164] ? __pfx_lock_acquire+0x10/0x10 [ 31.376695] ? __pfx_mmap_region+0x10/0x10 [ 31.377227] ? security_mmap_addr+0x7d/0xa0 [ 31.377747] ? get_unmapped_area+0x1f5/0x3f0 [ 31.378305] do_mmap+0x854/0xf00 [ 31.378734] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.379234] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.379789] ksys_mmap_pgoff+0x3af/0x500 [ 31.380297] do_syscall_64+0x3f/0x90 [ 31.380773] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.381417] RIP: 0033:0x7f581430bd82 [ 31.381867] 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 [ 31.384031] RSP: 002b:00007ffc3485b458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.384929] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f581430bd82 [ 31.385773] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5813745000 [ 31.386641] RBP: 00007f5813745000 R08: 0000000000000009 R09: 0000000000001000 [ 31.387486] R10: 0000000000000812 R11: 0000000000000206 R12: 000055901c847ec0 [ 31.388324] R13: 00007ffc3485b470 R14: 00007ffc3485b4a0 R15: 00007ffc3485b800 [ 31.389179] [ 31.389462] [ 31.389678] Allocated by task 214: [ 31.390127] kasan_save_stack+0x22/0x50 [ 31.390627] kasan_set_track+0x25/0x30 [ 31.391118] __kasan_slab_alloc+0x59/0x70 [ 31.391638] kmem_cache_alloc+0x16b/0x370 [ 31.392156] vm_area_dup+0x20/0x160 [ 31.392606] __split_vma+0x170/0x950 [ 31.393065] split_vma+0xc6/0x110 [ 31.393493] mprotect_fixup+0x8d2/0xb30 [ 31.393993] do_mprotect_pkey+0x87e/0xd40 [ 31.394524] __x64_sys_mprotect+0x78/0xc0 [ 31.395041] do_syscall_64+0x3f/0x90 [ 31.395523] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.396163] [ 31.396378] Freed by task 214: [ 31.396772] kasan_save_stack+0x22/0x50 [ 31.397282] kasan_set_track+0x25/0x30 [ 31.397774] kasan_save_free_info+0x2b/0x50 [ 31.398321] __kasan_slab_free+0x10a/0x190 [ 31.398856] kmem_cache_free+0x10d/0x4d0 [ 31.399363] rcu_core+0x8c8/0x2860 [ 31.399808] __do_softirq+0x1b7/0x7d4 [ 31.400284] [ 31.400499] Last potentially related work creation: [ 31.401093] kasan_save_stack+0x22/0x50 [ 31.401597] __kasan_record_aux_stack+0x8e/0xa0 [ 31.402181] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.402820] remove_vma+0x139/0x170 [ 31.403264] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.403865] do_vmi_munmap+0x1f1/0x2b0 [ 31.404354] __vm_munmap+0x138/0x3a0 [ 31.404815] __x64_sys_munmap+0x59/0x80 [ 31.405312] do_syscall_64+0x3f/0x90 [ 31.405789] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.406432] [ 31.406648] Second to last potentially related work creation: [ 31.407340] kasan_save_stack+0x22/0x50 [ 31.407840] __kasan_record_aux_stack+0x8e/0xa0 [ 31.408408] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.409044] remove_vma+0x139/0x170 [ 31.409489] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.410033] do_vmi_munmap+0x1f1/0x2b0 [ 31.410540] mmap_region+0x1f9/0x2660 [ 31.411014] do_mmap+0x854/0xf00 [ 31.411439] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.411935] ksys_mmap_pgoff+0x3af/0x500 [ 31.412439] do_syscall_64+0x3f/0x90 [ 31.412906] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.413542] [ 31.413752] The buggy address belongs to the object at ffff88800f2a30e8 [ 31.413752] which belongs to the cache vm_area_struct of size 168 [ 31.415219] The buggy address is located 88 bytes inside of [ 31.415219] freed 168-byte region [ffff88800f2a30e8, ffff88800f2a3190) [ 31.416615] [ 31.416825] The buggy address belongs to the physical page: [ 31.417475] page:00000000c7f29b38 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2a3 [ 31.418585] memcg:ffff88800f29c601 [ 31.419002] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.419643] page_type: 0xffffffff() [ 31.420094] raw: 0100000000000200 ffff8880087a0c80 ffffea0000404e80 dead000000000006 [ 31.421001] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f29c601 [ 31.421903] page dumped because: kasan: bad access detected [ 31.422578] [ 31.422788] Memory state around the buggy address: [ 31.423373] ffff88800f2a3000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.424221] ffff88800f2a3080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.425077] >ffff88800f2a3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.425930] ^ [ 31.426577] ffff88800f2a3180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 31.427425] ffff88800f2a3200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.428279] ================================================================== [ 31.429313] Disabling lock debugging due to kernel taint [ 33.580651] BUG: Bad rss-counter state mm:00000000b700d8c5 type:MM_FILEPAGES val:33 [ 33.581814] BUG: Bad rss-counter state mm:00000000b700d8c5 type:MM_ANONPAGES val:22 [ 33.987695] BUG: Bad rss-counter state mm:0000000029809b7a type:MM_FILEPAGES val:33 [ 33.988703] BUG: Bad rss-counter state mm:0000000029809b7a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60206' (ECDSA) to the list of known hosts. 2023/06/20 16:40:36 fuzzer started 2023/06/20 16:40:36 dialing manager at localhost:36067 2023/06/20 16:40:36 checking machine... 2023/06/20 16:40:36 checking revisions... [ 34.653923] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:40:37 testing simple program... [ 34.688614] cgroup: Unknown subsys name 'net' [ 34.723131] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:40:36 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800b103c80 RCX=ffffffff844f40e6 RDX=ffffed10016207d6 RSI=0000000000000008 RDI=ffff88800b103ea8 RBP=0000000000000001 RSP=ffff88801029f8b8 R8 =0000000000000001 R9 =ffffed10016207d5 R10=ffff88800b103eaf R11=0000000000000000 R12=ffff88801029f928 R13=dffffc0000000000 R14=ffff88800b103ea8 R15=0000000000000000 RIP=ffffffff844f40ea RFL=00000047 [---Z-PC] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9c25700900 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=00007f9c24b5c3c0 CR3=000000000c538000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=50d517dbf616a1a300000000000ae988 XMM05=ab84695b782b3a2d00000000001355f0 XMM06=6f6188884b9db53f0000000000134390 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88801ca1fb18 RSI=ffff88801ca1fae0 RDI=ffff88801ca1f060 RBP=ffff88801ca18000 RSP=ffff88801ca1f020 R8 =0000000000000001 R9 =ffff88801ca1f090 R10=0000000000038001 R11=00000000000b3f70 R12=ffff88801ca1f0b0 R13=ffff88801ca1f098 R14=ffff88801ca1fae0 R15=ffff88801ca1f050 RIP=ffffffff81130930 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 00007fe6c77a5900 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=00007fe6c7784020 CR3=000000000fd08000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000