syzkaller login: [ 30.194997] BUG: Bad rss-counter state mm:000000003d0f8201 type:MM_FILEPAGES val:33 [ 30.195821] BUG: Bad rss-counter state mm:000000003d0f8201 type:MM_ANONPAGES val:22 [ 30.383485] ================================================================== [ 30.384361] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.385230] Read of size 8 at addr ffff88800df45880 by task sshd/220 [ 30.386004] [ 30.386215] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.387079] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.388011] Call Trace: [ 30.388314] [ 30.388641] dump_stack_lvl+0x91/0xf0 [ 30.389129] print_report+0xcc/0x620 [ 30.389590] ? __virt_addr_valid+0x102/0x340 [ 30.390150] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.390734] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.391331] kasan_report+0xbe/0xf0 [ 30.391791] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.392401] vma_interval_tree_remove+0xc75/0xec0 [ 30.393009] vma_prepare+0xc54/0x11a0 [ 30.393489] __split_vma+0x5af/0x950 [ 30.394004] ? __pfx___split_vma+0x10/0x10 [ 30.394532] ? find_held_lock+0x2c/0x110 [ 30.395070] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.395631] ? lock_is_held_type+0x9f/0x120 [ 30.396220] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.396864] ? mtree_range_walk+0x632/0x900 [ 30.397417] ? mas_walk+0x5c7/0x7c0 [ 30.397925] do_vmi_munmap+0x1f1/0x2b0 [ 30.398419] mmap_region+0x1f9/0x2660 [ 30.398916] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.399426] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.400148] ? __pfx_lock_acquire+0x10/0x10 [ 30.400708] ? __pfx_mmap_region+0x10/0x10 [ 30.401261] ? security_mmap_addr+0x7d/0xa0 [ 30.401788] ? get_unmapped_area+0x1f5/0x3f0 [ 30.402356] do_mmap+0x854/0xf00 [ 30.402799] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.403299] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.403873] ksys_mmap_pgoff+0x3af/0x500 [ 30.404403] do_syscall_64+0x3f/0x90 [ 30.404901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.405548] RIP: 0033:0x7f85e3fb0d82 [ 30.406040] 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 [ 30.408177] RSP: 002b:00007ffd3da96f98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.409113] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f85e3fb0d82 [ 30.409995] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f85e33ea000 [ 30.410850] RBP: 00007f85e33ea000 R08: 0000000000000009 R09: 0000000000001000 [ 30.411684] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ee938c1f70 [ 30.412568] R13: 00007ffd3da96fb0 R14: 00007ffd3da96fe0 R15: 00007ffd3da97340 [ 30.413443] [ 30.413732] [ 30.413981] Allocated by task 213: [ 30.414405] kasan_save_stack+0x22/0x50 [ 30.414934] kasan_set_track+0x25/0x30 [ 30.415425] __kasan_slab_alloc+0x59/0x70 [ 30.415960] kmem_cache_alloc+0x16b/0x370 [ 30.416480] vm_area_dup+0x20/0x160 [ 30.416977] __split_vma+0x170/0x950 [ 30.417450] split_vma+0xc6/0x110 [ 30.417923] mprotect_fixup+0x8d2/0xb30 [ 30.418436] do_mprotect_pkey+0x87e/0xd40 [ 30.418970] __x64_sys_mprotect+0x78/0xc0 [ 30.419485] do_syscall_64+0x3f/0x90 [ 30.419968] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.420636] [ 30.420869] Freed by task 213: [ 30.421263] kasan_save_stack+0x22/0x50 [ 30.421768] kasan_set_track+0x25/0x30 [ 30.422290] kasan_save_free_info+0x2b/0x50 [ 30.422833] __kasan_slab_free+0x10a/0x190 [ 30.423367] kmem_cache_free+0x10d/0x4d0 [ 30.423894] rcu_core+0x8c8/0x2860 [ 30.424337] __do_softirq+0x1b7/0x7d4 [ 30.424826] [ 30.425042] Last potentially related work creation: [ 30.425618] kasan_save_stack+0x22/0x50 [ 30.426153] __kasan_record_aux_stack+0x8e/0xa0 [ 30.426715] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.427363] remove_vma+0x139/0x170 [ 30.427831] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.428417] do_vmi_munmap+0x1f1/0x2b0 [ 30.428921] __vm_munmap+0x138/0x3a0 [ 30.429391] __x64_sys_munmap+0x59/0x80 [ 30.429914] do_syscall_64+0x3f/0x90 [ 30.430399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.431053] [ 30.431267] The buggy address belongs to the object at ffff88800df45828 [ 30.431267] which belongs to the cache vm_area_struct of size 168 [ 30.432758] The buggy address is located 88 bytes inside of [ 30.432758] freed 168-byte region [ffff88800df45828, ffff88800df458d0) [ 30.434211] [ 30.434424] The buggy address belongs to the physical page: [ 30.435093] page:000000001de35a9c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf45 [ 30.436184] memcg:ffff888013a15901 [ 30.436621] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.437300] page_type: 0xffffffff() [ 30.437743] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b95c0 dead000000000002 [ 30.438697] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013a15901 [ 30.439630] page dumped because: kasan: bad access detected [ 30.440312] [ 30.440550] Memory state around the buggy address: [ 30.441170] ffff88800df45780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.442048] ffff88800df45800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.442936] >ffff88800df45880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.443780] ^ [ 30.444203] ffff88800df45900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.445092] ffff88800df45980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 30.445973] ================================================================== [ 30.447140] Disabling lock debugging due to kernel taint [ 32.345508] BUG: Bad rss-counter state mm:000000002696e8ae type:MM_FILEPAGES val:33 [ 32.346696] BUG: Bad rss-counter state mm:000000002696e8ae type:MM_ANONPAGES val:22 [ 32.825765] BUG: Bad rss-counter state mm:0000000029e71721 type:MM_FILEPAGES val:33 [ 32.826981] BUG: Bad rss-counter state mm:0000000029e71721 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11359' (ECDSA) to the list of known hosts. 2023/06/20 18:25:44 fuzzer started 2023/06/20 18:25:44 dialing manager at localhost:36067 2023/06/20 18:25:44 checking machine... 2023/06/20 18:25:44 checking revisions... [ 33.532235] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:25:44 testing simple program... [ 33.586014] cgroup: Unknown subsys name 'net' [ 33.628535] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:25:44 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800d9ff418 RCX=ffffffff86138e01 RDX=1ffff11001b3fe83 RSI=0000000000000000 RDI=ffff88800d9ff418 RBP=ffff88800d9ff4b0 RSP=ffff88800d9ff400 R8 =ffffffff86138e90 R9 =ffff88800d9ff458 R10=0000000000038001 R11=0000000000020d8f R12=ffff88800d9ff4e0 R13=0000000000000000 R14=ffff88800fa23680 R15=0000000000092cc0 RIP=ffffffff8113035a RFL=00000212 [----A--] 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 00007fe40aae4900 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=000056108abc4818 CR3=000000000c53c000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=858398ae16efee4d00000000000ae988 XMM05=ca70ba3f445d69550000000000132410 XMM06=19e9129bd510f2350000000000131578 XMM07=fb795ef6d65770560000000000121720 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888008d91b40 RSI=ffffffff813bbe25 RDI=0000000000000005 RBP=ffff888008da7c98 RSP=ffff888008da7b58 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000003 R12=ffff88806cf293c0 R13=00000000fffbea3b R14=0000000000000000 R15=00000000ffffffff RIP=ffffffff813bbe25 RFL=00000093 [--S-A-C] 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=00007ffecb557488 CR3=000000000e96a000 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=2034343a35323a3831203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a35323a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000