syzkaller login: [ 32.314077] BUG: Bad rss-counter state mm:00000000deb10e76 type:MM_FILEPAGES val:33 [ 32.315093] BUG: Bad rss-counter state mm:00000000deb10e76 type:MM_ANONPAGES val:22 [ 32.473339] ================================================================== [ 32.474259] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.475208] Read of size 8 at addr ffff88801a132880 by task sshd/219 [ 32.476088] [ 32.476323] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.477207] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.478232] Call Trace: [ 32.478554] [ 32.478841] dump_stack_lvl+0x91/0xf0 [ 32.479336] print_report+0xcc/0x620 [ 32.479822] ? __virt_addr_valid+0x102/0x340 [ 32.480377] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.481021] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.481638] kasan_report+0xbe/0xf0 [ 32.482120] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.482741] vma_interval_tree_remove+0xc75/0xec0 [ 32.483357] vma_prepare+0xc54/0x11a0 [ 32.483844] __split_vma+0x5af/0x950 [ 32.484340] ? __pfx___split_vma+0x10/0x10 [ 32.484902] ? find_held_lock+0x2c/0x110 [ 32.485431] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.486013] ? lock_is_held_type+0x9f/0x120 [ 32.486557] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.487180] ? mtree_range_walk+0x632/0x900 [ 32.487746] ? mas_walk+0x5c7/0x7c0 [ 32.488223] do_vmi_munmap+0x1f1/0x2b0 [ 32.488728] mmap_region+0x1f9/0x2660 [ 32.489219] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.489737] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.490469] ? __pfx_lock_acquire+0x10/0x10 [ 32.491018] ? __pfx_mmap_region+0x10/0x10 [ 32.491566] ? security_mmap_addr+0x7d/0xa0 [ 32.492105] ? get_unmapped_area+0x1f5/0x3f0 [ 32.492694] do_mmap+0x854/0xf00 [ 32.493157] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.493661] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.494238] ksys_mmap_pgoff+0x3af/0x500 [ 32.494746] do_syscall_64+0x3f/0x90 [ 32.495248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.495900] RIP: 0033:0x7f74617b2d82 [ 32.496370] 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 [ 32.498553] RSP: 002b:00007ffd9547ab18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.499479] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f74617b2d82 [ 32.500358] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7460bec000 [ 32.501251] RBP: 00007f7460bec000 R08: 0000000000000009 R09: 0000000000001000 [ 32.502122] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c64225bec0 [ 32.502980] R13: 00007ffd9547ab30 R14: 00007ffd9547ab60 R15: 00007ffd9547aec0 [ 32.503870] [ 32.504163] [ 32.504382] Allocated by task 212: [ 32.504838] kasan_save_stack+0x22/0x50 [ 32.505363] kasan_set_track+0x25/0x30 [ 32.505864] __kasan_slab_alloc+0x59/0x70 [ 32.506399] kmem_cache_alloc+0x16b/0x370 [ 32.506925] vm_area_dup+0x20/0x160 [ 32.507391] __split_vma+0x170/0x950 [ 32.507867] split_vma+0xc6/0x110 [ 32.508304] mprotect_fixup+0x8d2/0xb30 [ 32.508834] do_mprotect_pkey+0x87e/0xd40 [ 32.509366] __x64_sys_mprotect+0x78/0xc0 [ 32.509901] do_syscall_64+0x3f/0x90 [ 32.510387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.511034] [ 32.511258] Freed by task 212: [ 32.511662] kasan_save_stack+0x22/0x50 [ 32.512177] kasan_set_track+0x25/0x30 [ 32.512697] kasan_save_free_info+0x2b/0x50 [ 32.513244] __kasan_slab_free+0x10a/0x190 [ 32.513790] kmem_cache_free+0x10d/0x4d0 [ 32.514319] rcu_core+0x8c8/0x2860 [ 32.514766] __do_softirq+0x1b7/0x7d4 [ 32.515257] [ 32.515472] Last potentially related work creation: [ 32.516072] kasan_save_stack+0x22/0x50 [ 32.516627] __kasan_record_aux_stack+0x8e/0xa0 [ 32.517238] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.517968] remove_vma+0x139/0x170 [ 32.518425] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.518990] do_vmi_munmap+0x1f1/0x2b0 [ 32.519492] __vm_munmap+0x138/0x3a0 [ 32.519969] __x64_sys_munmap+0x59/0x80 [ 32.520482] do_syscall_64+0x3f/0x90 [ 32.520976] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.521627] [ 32.521844] The buggy address belongs to the object at ffff88801a132828 [ 32.521844] which belongs to the cache vm_area_struct of size 168 [ 32.523346] The buggy address is located 88 bytes inside of [ 32.523346] freed 168-byte region [ffff88801a132828, ffff88801a1328d0) [ 32.524784] [ 32.525001] The buggy address belongs to the physical page: [ 32.525708] page:0000000032f45906 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a132 [ 32.527099] memcg:ffff888019e1e001 [ 32.527644] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.528482] page_type: 0xffffffff() [ 32.529038] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.529984] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e1e001 [ 32.530924] page dumped because: kasan: bad access detected [ 32.531652] [ 32.531872] Memory state around the buggy address: [ 32.532471] ffff88801a132780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.533402] ffff88801a132800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.534276] >ffff88801a132880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.535151] ^ [ 32.535577] ffff88801a132900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.536455] ffff88801a132980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 32.537366] ================================================================== [ 32.538345] Disabling lock debugging due to kernel taint [ 35.349075] BUG: Bad rss-counter state mm:000000001f022eb7 type:MM_FILEPAGES val:33 [ 35.350724] BUG: Bad rss-counter state mm:000000001f022eb7 type:MM_ANONPAGES val:22 [ 35.816193] BUG: Bad rss-counter state mm:00000000ec6fd72a type:MM_FILEPAGES val:33 [ 35.817553] BUG: Bad rss-counter state mm:00000000ec6fd72a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51953' (ECDSA) to the list of known hosts. 2023/06/20 03:27:24 fuzzer started 2023/06/20 03:27:24 dialing manager at localhost:44161 2023/06/20 03:27:24 checking machine... 2023/06/20 03:27:24 checking revisions... [ 36.517995] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:27:24 testing simple program... [ 36.560932] cgroup: Unknown subsys name 'net' [ 36.600103] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:27:23 Registers: info registers vcpu 0 RAX=1ffffffff0f6ebc0 RBX=ffff88800844f780 RCX=00000000000008c0 RDX=dffffc0000000000 RSI=00000000000928c0 RDI=ffff88800844f780 RBP=ffff8880099cf6a8 RSP=ffff8880099cf640 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800844f780 R13=0000000000000000 R14=00000000000128c0 R15=ffffffff818470dc RIP=ffffffff81810af5 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 00007fd255ce5900 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=00007ffddaa8c000 CR3=0000000016724000 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=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180b155 RBX=0000000000000003 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000010 RDI=ffff88806cf09ba0 RBP=dffffc0000000000 RSP=ffff88806cf09af8 R8 =ffffffff860723cc R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000000000 R12=0000000000000010 R13=0000000000000000 R14=ffff88806cf09b88 R15=ffff88800f50da80 RIP=ffffffff813ad5cf 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=00007fa736bdcd70 CR3=000000000f666000 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=81a3d094b64a34a5c847d23defee7ad3 XMM02=000000000011d1d0ec2efd57dc4c00df XMM03=000000000012430849917ffcbe4de756 XMM04=90691ac7515da0d400000000000ae988 XMM05=dfcdbad4f1609c370000000000133e50 XMM06=138bc1ca77d0c8790000000000132cb8 XMM07=e042d86d42eb936e0000000000124588 XMM08=49917ffcbe4de756000000000011d230 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000