syzkaller login: [ 29.060258] BUG: Bad rss-counter state mm:00000000b460a896 type:MM_FILEPAGES val:33 [ 29.061323] BUG: Bad rss-counter state mm:00000000b460a896 type:MM_ANONPAGES val:22 [ 29.239154] ================================================================== [ 29.240060] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.241124] Read of size 8 at addr ffff88800cbe16b0 by task sshd/220 [ 29.241884] [ 29.242099] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.242979] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.244001] Call Trace: [ 29.244330] [ 29.244620] dump_stack_lvl+0x91/0xf0 [ 29.245115] print_report+0xcc/0x620 [ 29.245603] ? __virt_addr_valid+0x102/0x340 [ 29.246163] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.246791] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.247428] kasan_report+0xbe/0xf0 [ 29.247919] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.248553] vma_interval_tree_remove+0xc75/0xec0 [ 29.249153] vma_prepare+0xc54/0x11a0 [ 29.249632] __split_vma+0x5af/0x950 [ 29.250106] ? __pfx___split_vma+0x10/0x10 [ 29.250636] ? find_held_lock+0x2c/0x110 [ 29.251163] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.251739] ? lock_is_held_type+0x9f/0x120 [ 29.252285] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.252900] ? mtree_range_walk+0x632/0x900 [ 29.253458] ? mas_walk+0x5c7/0x7c0 [ 29.253944] do_vmi_munmap+0x1f1/0x2b0 [ 29.254440] mmap_region+0x1f9/0x2660 [ 29.254924] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.255475] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.256199] ? __pfx_lock_acquire+0x10/0x10 [ 29.256734] ? __pfx_mmap_region+0x10/0x10 [ 29.257270] ? security_mmap_addr+0x7d/0xa0 [ 29.257809] ? get_unmapped_area+0x1f5/0x3f0 [ 29.258365] do_mmap+0x854/0xf00 [ 29.258810] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.259324] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.259896] ksys_mmap_pgoff+0x3af/0x500 [ 29.260411] do_syscall_64+0x3f/0x90 [ 29.260900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.261556] RIP: 0033:0x7f796956ed82 [ 29.262018] 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 [ 29.264164] RSP: 002b:00007fff6b5beb58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.265081] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f796956ed82 [ 29.265936] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f79689a8000 [ 29.266784] RBP: 00007f79689a8000 R08: 0000000000000009 R09: 0000000000001000 [ 29.267659] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556d1e167d90 [ 29.268511] R13: 00007fff6b5beb70 R14: 00007fff6b5beba0 R15: 00007fff6b5bef00 [ 29.269370] [ 29.269662] [ 29.269878] Allocated by task 211: [ 29.270313] kasan_save_stack+0x22/0x50 [ 29.270818] kasan_set_track+0x25/0x30 [ 29.271324] __kasan_slab_alloc+0x59/0x70 [ 29.271853] kmem_cache_alloc+0x16b/0x370 [ 29.272377] vm_area_dup+0x20/0x160 [ 29.272835] __split_vma+0x170/0x950 [ 29.273300] split_vma+0xc6/0x110 [ 29.273740] mprotect_fixup+0x8d2/0xb30 [ 29.274239] do_mprotect_pkey+0x87e/0xd40 [ 29.274764] __x64_sys_mprotect+0x78/0xc0 [ 29.275307] do_syscall_64+0x3f/0x90 [ 29.275788] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.276432] [ 29.276647] Freed by task 211: [ 29.277037] kasan_save_stack+0x22/0x50 [ 29.277540] kasan_set_track+0x25/0x30 [ 29.278036] kasan_save_free_info+0x2b/0x50 [ 29.278574] __kasan_slab_free+0x10a/0x190 [ 29.279113] kmem_cache_free+0x10d/0x4d0 [ 29.279632] rcu_core+0x8c8/0x2860 [ 29.280079] __do_softirq+0x1b7/0x7d4 [ 29.280567] [ 29.280781] Last potentially related work creation: [ 29.281379] kasan_save_stack+0x22/0x50 [ 29.281889] __kasan_record_aux_stack+0x8e/0xa0 [ 29.282474] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.283128] remove_vma+0x139/0x170 [ 29.283595] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.284156] do_vmi_munmap+0x1f1/0x2b0 [ 29.284641] __vm_munmap+0x138/0x3a0 [ 29.285105] __x64_sys_munmap+0x59/0x80 [ 29.285616] do_syscall_64+0x3f/0x90 [ 29.286091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.286746] [ 29.286966] Second to last potentially related work creation: [ 29.287686] kasan_save_stack+0x22/0x50 [ 29.288195] __kasan_record_aux_stack+0x8e/0xa0 [ 29.288767] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.289421] remove_vma+0x139/0x170 [ 29.289884] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.290446] do_vmi_munmap+0x1f1/0x2b0 [ 29.290930] mmap_region+0x1f9/0x2660 [ 29.291415] do_mmap+0x854/0xf00 [ 29.291881] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.292364] ksys_mmap_pgoff+0x3af/0x500 [ 29.292880] do_syscall_64+0x3f/0x90 [ 29.293358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.294016] [ 29.294238] The buggy address belongs to the object at ffff88800cbe1658 [ 29.294238] which belongs to the cache vm_area_struct of size 168 [ 29.295741] The buggy address is located 88 bytes inside of [ 29.295741] freed 168-byte region [ffff88800cbe1658, ffff88800cbe1700) [ 29.297160] [ 29.297377] The buggy address belongs to the physical page: [ 29.298037] page:0000000037cf3e6f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcbe1 [ 29.299122] memcg:ffff8880140b0a01 [ 29.299553] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.300252] page_type: 0xffffffff() [ 29.300703] raw: 0100000000000200 ffff8880087a0c80 ffffea0000380f40 dead000000000003 [ 29.301625] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880140b0a01 [ 29.302523] page dumped because: kasan: bad access detected [ 29.303204] [ 29.303420] Memory state around the buggy address: [ 29.304008] ffff88800cbe1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.304871] ffff88800cbe1600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.305740] >ffff88800cbe1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.306594] ^ [ 29.307184] ffff88800cbe1700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.308034] ffff88800cbe1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 29.308892] ================================================================== [ 29.309869] Disabling lock debugging due to kernel taint [ 31.682459] BUG: Bad rss-counter state mm:00000000df848e3b type:MM_FILEPAGES val:33 [ 31.683501] BUG: Bad rss-counter state mm:00000000df848e3b type:MM_ANONPAGES val:22 [ 32.130705] BUG: Bad rss-counter state mm:00000000a9d352d8 type:MM_FILEPAGES val:33 [ 32.132356] BUG: Bad rss-counter state mm:00000000a9d352d8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11444' (ECDSA) to the list of known hosts. 2023/06/20 18:27:44 fuzzer started 2023/06/20 18:27:44 dialing manager at localhost:36067 2023/06/20 18:27:44 checking machine... 2023/06/20 18:27:44 checking revisions... [ 32.822648] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:27:45 testing simple program... [ 32.860559] cgroup: Unknown subsys name 'net' [ 32.911071] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:27:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880102b1b40 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff8880142e73a0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=0000000000092cc0 RIP=ffffffff814c0400 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 00007f04a704f900 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=00005579b3487768 CR3=000000000c4cc000 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=616ccc8920b9421100000000000ae988 XMM05=3fe831007e10573b00000000001334b8 XMM06=5f916e327a3339630000000000132560 XMM07=fb795ef6d65770560000000000120d68 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8171202d RDX=1ffffd40000db5d8 RSI=0000000000000001 RDI=0000000000000000 RBP=ffff88801c957d90 RSP=ffff88801c957bf8 R8 =0000000000000000 R9 =fffff940000db5d8 R10=ffffea00006daec7 R11=0000000000000000 R12=0000000000000000 R13=ffff88800e9bc9f8 R14=0000000000000001 R15=0000000000000000 RIP=ffffffff814c03a8 RFL=00000202 [-------] 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 00007febaf803900 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=00005579b3481664 CR3=000000001a38a000 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=000000000000000000005579b1712060 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000