syzkaller login: [ 31.157903] BUG: Bad rss-counter state mm:00000000fb02a71b type:MM_FILEPAGES val:33 [ 31.159253] BUG: Bad rss-counter state mm:00000000fb02a71b type:MM_ANONPAGES val:22 [ 31.295900] ================================================================== [ 31.296830] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.297778] Read of size 8 at addr ffff88800eb3d3f8 by task sshd/220 [ 31.298548] [ 31.298768] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.299783] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.300782] Call Trace: [ 31.301113] [ 31.301429] dump_stack_lvl+0x91/0xf0 [ 31.301930] print_report+0xcc/0x620 [ 31.302435] ? __virt_addr_valid+0x102/0x340 [ 31.303026] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.303660] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.304278] kasan_report+0xbe/0xf0 [ 31.304764] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.305390] vma_interval_tree_remove+0xc75/0xec0 [ 31.305993] vma_prepare+0xc54/0x11a0 [ 31.306484] __split_vma+0x5af/0x950 [ 31.306963] ? __pfx___split_vma+0x10/0x10 [ 31.307500] ? find_held_lock+0x2c/0x110 [ 31.308026] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.308601] ? lock_is_held_type+0x9f/0x120 [ 31.309146] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.309776] ? mtree_range_walk+0x632/0x900 [ 31.310339] ? mas_walk+0x5c7/0x7c0 [ 31.310846] do_vmi_munmap+0x1f1/0x2b0 [ 31.311352] mmap_region+0x1f9/0x2660 [ 31.311840] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.312375] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.313106] ? __pfx_lock_acquire+0x10/0x10 [ 31.313660] ? __pfx_mmap_region+0x10/0x10 [ 31.314235] ? security_mmap_addr+0x7d/0xa0 [ 31.314779] ? get_unmapped_area+0x1f5/0x3f0 [ 31.315339] do_mmap+0x854/0xf00 [ 31.315781] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.316281] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.316852] ksys_mmap_pgoff+0x3af/0x500 [ 31.317372] do_syscall_64+0x3f/0x90 [ 31.317850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.318514] RIP: 0033:0x7f53158ddd82 [ 31.318974] 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 [ 31.321136] RSP: 002b:00007ffee4023248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.322068] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f53158ddd82 [ 31.322946] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5314d17000 [ 31.323807] RBP: 00007f5314d17000 R08: 0000000000000009 R09: 0000000000001000 [ 31.324711] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561cfb1a6f70 [ 31.325603] R13: 00007ffee4023260 R14: 00007ffee4023290 R15: 00007ffee40235f0 [ 31.326490] [ 31.326790] [ 31.327009] Allocated by task 213: [ 31.327444] kasan_save_stack+0x22/0x50 [ 31.327960] kasan_set_track+0x25/0x30 [ 31.328460] __kasan_slab_alloc+0x59/0x70 [ 31.328991] kmem_cache_alloc+0x16b/0x370 [ 31.329532] vm_area_dup+0x20/0x160 [ 31.329994] __split_vma+0x170/0x950 [ 31.330471] split_vma+0xc6/0x110 [ 31.330933] mprotect_fixup+0x8d2/0xb30 [ 31.331450] do_mprotect_pkey+0x87e/0xd40 [ 31.331979] __x64_sys_mprotect+0x78/0xc0 [ 31.332509] do_syscall_64+0x3f/0x90 [ 31.333004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.333686] [ 31.333909] Freed by task 19: [ 31.334327] kasan_save_stack+0x22/0x50 [ 31.334835] kasan_set_track+0x25/0x30 [ 31.335340] kasan_save_free_info+0x2b/0x50 [ 31.335883] __kasan_slab_free+0x10a/0x190 [ 31.336439] kmem_cache_free+0x10d/0x4d0 [ 31.336965] rcu_core+0x8c8/0x2860 [ 31.337441] __do_softirq+0x1b7/0x7d4 [ 31.337919] [ 31.338138] Last potentially related work creation: [ 31.338734] kasan_save_stack+0x22/0x50 [ 31.339249] __kasan_record_aux_stack+0x8e/0xa0 [ 31.339828] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.340477] remove_vma+0x139/0x170 [ 31.340936] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.341626] do_vmi_munmap+0x1f1/0x2b0 [ 31.342121] __vm_munmap+0x138/0x3a0 [ 31.342596] __x64_sys_munmap+0x59/0x80 [ 31.343103] do_syscall_64+0x3f/0x90 [ 31.343581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.344227] [ 31.344446] The buggy address belongs to the object at ffff88800eb3d3a0 [ 31.344446] which belongs to the cache vm_area_struct of size 168 [ 31.345941] The buggy address is located 88 bytes inside of [ 31.345941] freed 168-byte region [ffff88800eb3d3a0, ffff88800eb3d448) [ 31.347377] [ 31.347595] The buggy address belongs to the physical page: [ 31.348273] page:0000000016a6d423 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb3d [ 31.349409] memcg:ffff88800e285001 [ 31.349852] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.350568] page_type: 0xffffffff() [ 31.351029] raw: 0100000000000200 ffff88800879fc80 ffffea0000267340 dead000000000005 [ 31.351974] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e285001 [ 31.352900] page dumped because: kasan: bad access detected [ 31.353604] [ 31.353829] Memory state around the buggy address: [ 31.354434] ffff88800eb3d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.355321] ffff88800eb3d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.356179] >ffff88800eb3d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.357059] ^ [ 31.357958] ffff88800eb3d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.358823] ffff88800eb3d480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.359692] ================================================================== [ 31.360708] Disabling lock debugging due to kernel taint [ 33.193271] BUG: Bad rss-counter state mm:00000000f066cd8b type:MM_FILEPAGES val:33 [ 33.194010] BUG: Bad rss-counter state mm:00000000f066cd8b type:MM_ANONPAGES val:22 [ 33.587721] BUG: Bad rss-counter state mm:0000000004d464ef type:MM_FILEPAGES val:33 [ 33.588426] BUG: Bad rss-counter state mm:0000000004d464ef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53137' (ECDSA) to the list of known hosts. 2023/06/19 20:41:26 fuzzer started 2023/06/19 20:41:26 dialing manager at localhost:44161 2023/06/19 20:41:26 checking machine... 2023/06/19 20:41:26 checking revisions... [ 34.264849] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:41:26 testing simple program... [ 34.307437] cgroup: Unknown subsys name 'net' [ 34.355482] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:41:26 Registers: info registers vcpu 0 RAX=00007fdcf582b120 RBX=00007ffcfb254100 RCX=00007ffcfb254090 RDX=000000000000001e RSI=000000000000002c RDI=00007fdcf6310060 RBP=00007ffcfb254230 RSP=00007ffcfb253fa0 R8 =000056107cdb7810 R9 =00007ffcfb254130 R10=000000000000002c R11=0000000000000246 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=00007fdcf62f99de RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fdcf576e900 00000000 00000000 GS =0000 0000000000000000 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=00007fdcf582b50c CR3=000000000e110000 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=6720646572637465733a4d41503d706f 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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800e20b638 RCX=ffffffff812e00e5 RDX=1ffff11001c416c7 RSI=ffffffff87b86f80 RDI=ffff88800c598510 RBP=ffff888009335d10 RSP=ffff88806cf09de8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=0000000000000000 R12=0000000000000287 R13=ffff88800c598508 R14=ffffffff818c7463 R15=ffff88800d9d4780 RIP=ffffffff84513679 RFL=00000046 [---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=00007fd87e04e290 CR3=0000000019f86000 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=2036323a31343a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a31343a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000