syzkaller login: [ 32.610286] BUG: Bad rss-counter state mm:00000000f7eae959 type:MM_FILEPAGES val:33 [ 32.611741] BUG: Bad rss-counter state mm:00000000f7eae959 type:MM_ANONPAGES val:22 [ 32.770007] ================================================================== [ 32.771090] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.772202] Read of size 8 at addr ffff88800f4fa140 by task sshd/220 [ 32.773108] [ 32.773339] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.774244] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.775268] Call Trace: [ 32.775602] [ 32.775917] dump_stack_lvl+0x91/0xf0 [ 32.776436] print_report+0xcc/0x620 [ 32.776948] ? __virt_addr_valid+0x102/0x340 [ 32.777534] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.778185] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.778834] kasan_report+0xbe/0xf0 [ 32.779342] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.780007] vma_interval_tree_remove+0xc75/0xec0 [ 32.780653] vma_prepare+0xc54/0x11a0 [ 32.781171] __split_vma+0x5af/0x950 [ 32.781686] ? __pfx___split_vma+0x10/0x10 [ 32.782255] ? find_held_lock+0x2c/0x110 [ 32.782823] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.783437] ? lock_is_held_type+0x9f/0x120 [ 32.784038] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.784687] ? mtree_range_walk+0x632/0x900 [ 32.785280] ? mas_walk+0x5c7/0x7c0 [ 32.785793] do_vmi_munmap+0x1f1/0x2b0 [ 32.786326] mmap_region+0x1f9/0x2660 [ 32.786844] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.787388] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.788167] ? __pfx_lock_acquire+0x10/0x10 [ 32.788735] ? __pfx_mmap_region+0x10/0x10 [ 32.789306] ? security_mmap_addr+0x7d/0xa0 [ 32.789874] ? get_unmapped_area+0x1f5/0x3f0 [ 32.790468] do_mmap+0x854/0xf00 [ 32.790946] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.791475] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.792095] ksys_mmap_pgoff+0x3af/0x500 [ 32.792644] do_syscall_64+0x3f/0x90 [ 32.793158] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.793848] RIP: 0033:0x7f82d4f48d82 [ 32.794345] 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 [ 32.796665] RSP: 002b:00007fff772f55f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.797697] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f82d4f48d82 [ 32.798660] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f82d4382000 [ 32.799620] RBP: 00007f82d4382000 R08: 0000000000000009 R09: 0000000000001000 [ 32.800597] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561541dc7ec0 [ 32.801563] R13: 00007fff772f5610 R14: 00007fff772f5640 R15: 00007fff772f59a0 [ 32.802534] [ 32.802862] [ 32.803106] Allocated by task 213: [ 32.803595] kasan_save_stack+0x22/0x50 [ 32.804183] kasan_set_track+0x25/0x30 [ 32.804676] __kasan_slab_alloc+0x59/0x70 [ 32.805202] kmem_cache_alloc+0x16b/0x370 [ 32.805713] vm_area_dup+0x20/0x160 [ 32.806162] __split_vma+0x170/0x950 [ 32.806631] split_vma+0xc6/0x110 [ 32.807065] mprotect_fixup+0x8d2/0xb30 [ 32.807564] do_mprotect_pkey+0x87e/0xd40 [ 32.808083] __x64_sys_mprotect+0x78/0xc0 [ 32.808598] do_syscall_64+0x3f/0x90 [ 32.809067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.809700] [ 32.809912] Freed by task 13: [ 32.810289] kasan_save_stack+0x22/0x50 [ 32.810789] kasan_set_track+0x25/0x30 [ 32.811273] kasan_save_free_info+0x2b/0x50 [ 32.811795] __kasan_slab_free+0x10a/0x190 [ 32.812333] kmem_cache_free+0x10d/0x4d0 [ 32.812839] rcu_core+0x8c8/0x2860 [ 32.813281] __do_softirq+0x1b7/0x7d4 [ 32.813752] [ 32.813966] Last potentially related work creation: [ 32.814546] kasan_save_stack+0x22/0x50 [ 32.815053] __kasan_record_aux_stack+0x8e/0xa0 [ 32.815615] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.816274] remove_vma+0x139/0x170 [ 32.816721] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.817271] do_vmi_munmap+0x1f1/0x2b0 [ 32.817750] __vm_munmap+0x138/0x3a0 [ 32.818208] __x64_sys_munmap+0x59/0x80 [ 32.818698] do_syscall_64+0x3f/0x90 [ 32.819169] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.819802] [ 32.820036] Second to last potentially related work creation: [ 32.820704] kasan_save_stack+0x22/0x50 [ 32.821201] __kasan_record_aux_stack+0x8e/0xa0 [ 32.821770] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.822402] remove_vma+0x139/0x170 [ 32.822847] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.823402] do_vmi_munmap+0x1f1/0x2b0 [ 32.823896] mmap_region+0x1f9/0x2660 [ 32.824382] do_mmap+0x854/0xf00 [ 32.824813] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.825299] ksys_mmap_pgoff+0x3af/0x500 [ 32.825792] do_syscall_64+0x3f/0x90 [ 32.826260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.826902] [ 32.827112] The buggy address belongs to the object at ffff88800f4fa0e8 [ 32.827112] which belongs to the cache vm_area_struct of size 168 [ 32.828583] The buggy address is located 88 bytes inside of [ 32.828583] freed 168-byte region [ffff88800f4fa0e8, ffff88800f4fa190) [ 32.829981] [ 32.830205] The buggy address belongs to the physical page: [ 32.830955] page:00000000c8dff57a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf4fa [ 32.832198] memcg:ffff88800dea6d01 [ 32.832684] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.833420] page_type: 0xffffffff() [ 32.833933] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 32.834986] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dea6d01 [ 32.836038] page dumped because: kasan: bad access detected [ 32.836789] [ 32.837037] Memory state around the buggy address: [ 32.837703] ffff88800f4fa000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.838695] ffff88800f4fa080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.839613] >ffff88800f4fa100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.840458] ^ [ 32.841087] ffff88800f4fa180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 32.841932] ffff88800f4fa200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.842769] ================================================================== [ 32.843751] Disabling lock debugging due to kernel taint [ 34.702589] BUG: Bad rss-counter state mm:00000000737d8f7c type:MM_FILEPAGES val:33 [ 34.704085] BUG: Bad rss-counter state mm:00000000737d8f7c type:MM_ANONPAGES val:22 [ 35.256084] BUG: Bad rss-counter state mm:00000000c58e3ef5 type:MM_FILEPAGES val:33 [ 35.257071] BUG: Bad rss-counter state mm:00000000c58e3ef5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58045' (ECDSA) to the list of known hosts. 2023/06/20 06:51:42 fuzzer started 2023/06/20 06:51:43 dialing manager at localhost:44161 2023/06/20 06:51:43 checking machine... 2023/06/20 06:51:43 checking revisions... [ 35.886202] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:51:43 testing simple program... [ 35.942347] cgroup: Unknown subsys name 'net' [ 35.990804] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:51:40 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffffffff854eea30 RCX=ffffffff8148315d RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff8880147377c8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffffffff854eea28 R15=0000000000000001 RIP=ffffffff814c02c8 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 00007f92449ad900 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=00007f9243dd4f10 CR3=000000000d882000 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=7ea6add705a6960800000000000ae988 XMM05=b7c69768b24919e20000000000135cd0 XMM06=4fda316b135da52b0000000000134ac0 XMM07=fb795ef6d65770560000000000123ce8 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=ffffffff8180c584 RDX=00000000000080c5 RSI=00000000000080c5 RDI=ffffffff86507ed4 RBP=ffff888008e579d0 RSP=ffff888008e57908 R8 =0000000000000000 R9 =ffff888008e579b8 R10=0000000000038001 R11=0000000000020d8a R12=ffff888008e579d8 R13=ffff888008e579c0 R14=ffff888008e579b9 R15=ffff888008e57978 RIP=ffffffff8113077a RFL=00000213 [----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=00007fd1035f2618 CR3=000000000ea7c000 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=31353a3630203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303135 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000