syzkaller login: [ 31.151558] BUG: Bad rss-counter state mm:00000000abb98045 type:MM_FILEPAGES val:33 [ 31.152969] BUG: Bad rss-counter state mm:00000000abb98045 type:MM_ANONPAGES val:22 [ 31.292163] ================================================================== [ 31.293108] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.294050] Read of size 8 at addr ffff8880097da3f8 by task sshd/220 [ 31.294825] [ 31.295134] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.296060] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.297044] Call Trace: [ 31.297383] [ 31.297674] dump_stack_lvl+0x91/0xf0 [ 31.298171] print_report+0xcc/0x620 [ 31.298671] ? __virt_addr_valid+0x102/0x340 [ 31.299226] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.299838] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.300466] kasan_report+0xbe/0xf0 [ 31.300947] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.301567] vma_interval_tree_remove+0xc75/0xec0 [ 31.302168] vma_prepare+0xc54/0x11a0 [ 31.302655] __split_vma+0x5af/0x950 [ 31.303139] ? __pfx___split_vma+0x10/0x10 [ 31.303666] ? find_held_lock+0x2c/0x110 [ 31.304193] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.304770] ? lock_is_held_type+0x9f/0x120 [ 31.305317] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.305924] ? mtree_range_walk+0x632/0x900 [ 31.306481] ? mas_walk+0x5c7/0x7c0 [ 31.306958] do_vmi_munmap+0x1f1/0x2b0 [ 31.307456] mmap_region+0x1f9/0x2660 [ 31.307945] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.308480] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.309204] ? __pfx_lock_acquire+0x10/0x10 [ 31.309736] ? __pfx_mmap_region+0x10/0x10 [ 31.310266] ? security_mmap_addr+0x7d/0xa0 [ 31.310797] ? get_unmapped_area+0x1f5/0x3f0 [ 31.311348] do_mmap+0x854/0xf00 [ 31.311800] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.312292] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.312866] ksys_mmap_pgoff+0x3af/0x500 [ 31.313373] do_syscall_64+0x3f/0x90 [ 31.313863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.314518] RIP: 0033:0x7f2002a5cd82 [ 31.314984] 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 [ 31.317132] RSP: 002b:00007ffdfb474188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.318037] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2002a5cd82 [ 31.318900] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2001e96000 [ 31.319766] RBP: 00007f2001e96000 R08: 0000000000000009 R09: 0000000000001000 [ 31.320637] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561f14e78d90 [ 31.321507] R13: 00007ffdfb4741a0 R14: 00007ffdfb4741d0 R15: 00007ffdfb474530 [ 31.322383] [ 31.322684] [ 31.322899] Allocated by task 213: [ 31.323337] kasan_save_stack+0x22/0x50 [ 31.323856] kasan_set_track+0x25/0x30 [ 31.324359] __kasan_slab_alloc+0x59/0x70 [ 31.324904] kmem_cache_alloc+0x16b/0x370 [ 31.325437] vm_area_dup+0x20/0x160 [ 31.325889] __split_vma+0x170/0x950 [ 31.326357] split_vma+0xc6/0x110 [ 31.326801] mprotect_fixup+0x8d2/0xb30 [ 31.327304] do_mprotect_pkey+0x87e/0xd40 [ 31.327827] __x64_sys_mprotect+0x78/0xc0 [ 31.328357] do_syscall_64+0x3f/0x90 [ 31.328854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.329499] [ 31.329715] Freed by task 213: [ 31.330115] kasan_save_stack+0x22/0x50 [ 31.330647] kasan_set_track+0x25/0x30 [ 31.331145] kasan_save_free_info+0x2b/0x50 [ 31.331687] __kasan_slab_free+0x10a/0x190 [ 31.332223] kmem_cache_free+0x10d/0x4d0 [ 31.332758] rcu_core+0x8c8/0x2860 [ 31.333207] __do_softirq+0x1b7/0x7d4 [ 31.333690] [ 31.333915] Last potentially related work creation: [ 31.334509] kasan_save_stack+0x22/0x50 [ 31.335020] __kasan_record_aux_stack+0x8e/0xa0 [ 31.335606] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.336347] remove_vma+0x139/0x170 [ 31.336824] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.337395] do_vmi_munmap+0x1f1/0x2b0 [ 31.337889] __vm_munmap+0x138/0x3a0 [ 31.338365] __x64_sys_munmap+0x59/0x80 [ 31.338866] do_syscall_64+0x3f/0x90 [ 31.339344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.339987] [ 31.340200] Second to last potentially related work creation: [ 31.340899] kasan_save_stack+0x22/0x50 [ 31.341411] __kasan_record_aux_stack+0x8e/0xa0 [ 31.342005] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.342660] remove_vma+0x139/0x170 [ 31.343112] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.343680] do_vmi_munmap+0x1f1/0x2b0 [ 31.344164] mmap_region+0x1f9/0x2660 [ 31.344661] do_mmap+0x854/0xf00 [ 31.345109] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.345601] ksys_mmap_pgoff+0x3af/0x500 [ 31.346116] do_syscall_64+0x3f/0x90 [ 31.346597] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.347245] [ 31.347460] The buggy address belongs to the object at ffff8880097da3a0 [ 31.347460] which belongs to the cache vm_area_struct of size 168 [ 31.348973] The buggy address is located 88 bytes inside of [ 31.348973] freed 168-byte region [ffff8880097da3a0, ffff8880097da448) [ 31.350339] [ 31.350548] The buggy address belongs to the physical page: [ 31.351179] page:00000000d0f4e1bf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x97da [ 31.352208] memcg:ffff88800dab1901 [ 31.352624] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.353233] page_type: 0xffffffff() [ 31.353666] raw: 0100000000000200 ffff88800879fc80 ffffea00003141c0 dead000000000006 [ 31.354536] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dab1901 [ 31.355574] page dumped because: kasan: bad access detected [ 31.356250] [ 31.356486] Memory state around the buggy address: [ 31.357073] ffff8880097da280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.357936] ffff8880097da300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.358805] >ffff8880097da380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.359662] ^ [ 31.360514] ffff8880097da400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.361378] ffff8880097da480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.362231] ================================================================== [ 31.363155] Disabling lock debugging due to kernel taint [ 33.440732] BUG: Bad rss-counter state mm:00000000f3fa42b6 type:MM_FILEPAGES val:33 [ 33.441386] BUG: Bad rss-counter state mm:00000000f3fa42b6 type:MM_ANONPAGES val:22 [ 33.983228] BUG: Bad rss-counter state mm:00000000f677b3dc type:MM_FILEPAGES val:33 [ 33.984513] BUG: Bad rss-counter state mm:00000000f677b3dc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49736' (ECDSA) to the list of known hosts. 2023/06/20 06:47:02 fuzzer started 2023/06/20 06:47:02 dialing manager at localhost:44161 2023/06/20 06:47:02 checking machine... 2023/06/20 06:47:02 checking revisions... [ 34.568126] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:47:02 testing simple program... [ 34.593905] cgroup: Unknown subsys name 'net' [ 34.641165] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:46:59 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f9bd2bce0e0 CR3=0000000009f6c000 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=76925e2596f7999eca4d6300ba1c266c XMM02=ec2efd57dc4c00df000000000011d270 XMM03=596d71897c0826d3000000000011d340 XMM04=d61afa98d43c6fee00000000000ae988 XMM05=19e9129bd510f2350000000000134e78 XMM06=e3839c588ce014320000000000133ce0 XMM07=e042d86d42eb936e0000000000124298 XMM08=596d71897c0826d3000000000011d340 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000021 RBX=0000000000000001 RCX=ffffffff84601449 RDX=0000000000000021 RSI=ffffffff864baff8 RDI=ffffffff8605469c RBP=ffff88806cf09af0 RSP=ffff88806cf099f8 R8 =ffffffff864baff8 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffffffff8605471c R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff8112fc20 RFL=00000206 [-----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 00007f0d50d57900 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=00007ffc83d63000 CR3=000000000ef76000 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=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