syzkaller login: [ 32.627922] BUG: Bad rss-counter state mm:00000000340f69eb type:MM_FILEPAGES val:33 [ 32.629157] BUG: Bad rss-counter state mm:00000000340f69eb type:MM_ANONPAGES val:22 [ 32.786368] ================================================================== [ 32.787335] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.788324] Read of size 8 at addr ffff88801ad8b310 by task sshd/219 [ 32.789134] [ 32.789359] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.790393] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.791418] Call Trace: [ 32.791756] [ 32.792068] dump_stack_lvl+0x91/0xf0 [ 32.792589] print_report+0xcc/0x620 [ 32.793121] ? __virt_addr_valid+0x102/0x340 [ 32.793710] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.794377] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.795034] kasan_report+0xbe/0xf0 [ 32.795549] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.796210] vma_interval_tree_remove+0xc75/0xec0 [ 32.796866] vma_prepare+0xc54/0x11a0 [ 32.797397] __split_vma+0x5af/0x950 [ 32.797910] ? __pfx___split_vma+0x10/0x10 [ 32.798503] ? find_held_lock+0x2c/0x110 [ 32.799078] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.799700] ? lock_is_held_type+0x9f/0x120 [ 32.800293] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.800960] ? mtree_range_walk+0x632/0x900 [ 32.801565] ? mas_walk+0x5c7/0x7c0 [ 32.802085] do_vmi_munmap+0x1f1/0x2b0 [ 32.802662] mmap_region+0x1f9/0x2660 [ 32.803192] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.803760] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.804540] ? __pfx_lock_acquire+0x10/0x10 [ 32.805129] ? __pfx_mmap_region+0x10/0x10 [ 32.805718] ? security_mmap_addr+0x7d/0xa0 [ 32.806325] ? get_unmapped_area+0x1f5/0x3f0 [ 32.806941] do_mmap+0x854/0xf00 [ 32.807425] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.807966] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.808583] ksys_mmap_pgoff+0x3af/0x500 [ 32.809141] do_syscall_64+0x3f/0x90 [ 32.809669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.810406] RIP: 0033:0x7f044f4b1d82 [ 32.810909] 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 [ 32.813262] RSP: 002b:00007ffe151cd5e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.814248] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f044f4b1d82 [ 32.815214] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f044e8eb000 [ 32.816133] RBP: 00007f044e8eb000 R08: 0000000000000009 R09: 0000000000001000 [ 32.817063] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564b319a5ec0 [ 32.817993] R13: 00007ffe151cd600 R14: 00007ffe151cd630 R15: 00007ffe151cd990 [ 32.818939] [ 32.819248] [ 32.819477] Allocated by task 212: [ 32.819936] kasan_save_stack+0x22/0x50 [ 32.820469] kasan_set_track+0x25/0x30 [ 32.820996] __kasan_slab_alloc+0x59/0x70 [ 32.821553] kmem_cache_alloc+0x16b/0x370 [ 32.822099] vm_area_dup+0x20/0x160 [ 32.822607] __split_vma+0x170/0x950 [ 32.823096] split_vma+0xc6/0x110 [ 32.823579] mprotect_fixup+0x8d2/0xb30 [ 32.824117] do_mprotect_pkey+0x87e/0xd40 [ 32.824667] __x64_sys_mprotect+0x78/0xc0 [ 32.825219] do_syscall_64+0x3f/0x90 [ 32.825723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.826448] [ 32.826676] Freed by task 212: [ 32.827090] kasan_save_stack+0x22/0x50 [ 32.827628] kasan_set_track+0x25/0x30 [ 32.828154] kasan_save_free_info+0x2b/0x50 [ 32.828715] __kasan_slab_free+0x10a/0x190 [ 32.829290] kmem_cache_free+0x10d/0x4d0 [ 32.829828] rcu_core+0x8c8/0x2860 [ 32.830309] __do_softirq+0x1b7/0x7d4 [ 32.830832] [ 32.831066] Last potentially related work creation: [ 32.831687] kasan_save_stack+0x22/0x50 [ 32.832222] __kasan_record_aux_stack+0x8e/0xa0 [ 32.832828] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.833512] remove_vma+0x139/0x170 [ 32.833988] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.834624] do_vmi_munmap+0x1f1/0x2b0 [ 32.835143] __vm_munmap+0x138/0x3a0 [ 32.835644] __x64_sys_munmap+0x59/0x80 [ 32.836185] do_syscall_64+0x3f/0x90 [ 32.836710] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.837417] [ 32.837654] The buggy address belongs to the object at ffff88801ad8b2b8 [ 32.837654] which belongs to the cache vm_area_struct of size 168 [ 32.839312] The buggy address is located 88 bytes inside of [ 32.839312] freed 168-byte region [ffff88801ad8b2b8, ffff88801ad8b360) [ 32.840871] [ 32.841111] The buggy address belongs to the physical page: [ 32.841844] page:00000000b9b8c0fb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ad8b [ 32.843080] memcg:ffff88800e223d01 [ 32.843548] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.844250] page_type: 0xffffffff() [ 32.844742] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.845761] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e223d01 [ 32.846792] page dumped because: kasan: bad access detected [ 32.847535] [ 32.847772] Memory state around the buggy address: [ 32.848417] ffff88801ad8b200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.849362] ffff88801ad8b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.850322] >ffff88801ad8b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.851282] ^ [ 32.851794] ffff88801ad8b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.852738] ffff88801ad8b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.853669] ================================================================== [ 32.854732] Disabling lock debugging due to kernel taint [ 34.848506] BUG: Bad rss-counter state mm:00000000461aadea type:MM_FILEPAGES val:33 [ 34.850162] BUG: Bad rss-counter state mm:00000000461aadea type:MM_ANONPAGES val:22 [ 35.403446] BUG: Bad rss-counter state mm:00000000097fe9e0 type:MM_FILEPAGES val:33 [ 35.404658] BUG: Bad rss-counter state mm:00000000097fe9e0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11000' (ECDSA) to the list of known hosts. 2023/06/19 13:29:14 fuzzer started 2023/06/19 13:29:14 dialing manager at localhost:44161 2023/06/19 13:29:14 checking machine... 2023/06/19 13:29:14 checking revisions... [ 36.088744] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:29:14 testing simple program... [ 36.139116] cgroup: Unknown subsys name 'net' [ 36.188098] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:29:12 Registers: info registers vcpu 0 RAX=1ffffffff0bbf9e5 RBX=ffffffff85dfcf2c RCX=ffffffff8180ee7d RDX=0000000000000000 RSI=ffffffff86137cac RDI=ffffffff85dfcf14 RBP=ffffffff85dfcf14 RSP=ffff88806ce099b8 R8 =ffffffff86137cac R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000020ed0 R12=ffffffff85dfcf44 R13=ffffffff85dfcf14 R14=ffffffff85dfcf14 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 00007efd00ce4900 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=0000564f9512b568 CR3=000000000c540000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f99a29da86287ec000000000000ae988 XMM05=76f21e24c2201d170000000000135120 XMM06=806171799158d96700000000001341c0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ffdaec09e98 CR3=0000000016b82000 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=39323a3331203931206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732033313a3932 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343937 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000