syzkaller login: [ 44.231393] BUG: Bad rss-counter state mm:00000000b0e0cda8 type:MM_FILEPAGES val:33 [ 44.232746] BUG: Bad rss-counter state mm:00000000b0e0cda8 type:MM_ANONPAGES val:22 [ 44.267340] ================================================================== [ 44.268251] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.269328] Read of size 8 at addr ffff88801660aed8 by task sshd/219 [ 44.270167] [ 44.270383] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.271282] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.272522] Call Trace: [ 44.272836] [ 44.273128] dump_stack_lvl+0x91/0xf0 [ 44.273622] print_report+0xcc/0x620 [ 44.274234] ? __virt_addr_valid+0x102/0x340 [ 44.274783] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.275407] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.276159] kasan_report+0xbe/0xf0 [ 44.276735] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.277453] vma_interval_tree_remove+0xc75/0xec0 [ 44.278083] vma_prepare+0xc54/0x11a0 [ 44.278578] __split_vma+0x5af/0x950 [ 44.279075] ? __pfx___split_vma+0x10/0x10 [ 44.279628] ? find_held_lock+0x2c/0x110 [ 44.280165] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.280753] ? lock_is_held_type+0x9f/0x120 [ 44.281307] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.281937] ? mtree_range_walk+0x632/0x900 [ 44.282510] ? mas_walk+0x5c7/0x7c0 [ 44.283001] do_vmi_munmap+0x1f1/0x2b0 [ 44.283509] mmap_region+0x1f9/0x2660 [ 44.284003] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.284534] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.285274] ? __pfx_lock_acquire+0x10/0x10 [ 44.285844] ? __pfx_mmap_region+0x10/0x10 [ 44.286397] ? security_mmap_addr+0x7d/0xa0 [ 44.286944] ? get_unmapped_area+0x1f5/0x3f0 [ 44.287514] do_mmap+0x854/0xf00 [ 44.287967] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.288476] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.289053] ksys_mmap_pgoff+0x3af/0x500 [ 44.289576] do_syscall_64+0x3f/0x90 [ 44.290082] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.290743] RIP: 0033:0x7fa00fccbd82 [ 44.291216] 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 [ 44.293427] RSP: 002b:00007ffea9440b38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.294366] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa00fccbd82 [ 44.295245] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa00f105000 [ 44.296355] RBP: 00007fa00f105000 R08: 0000000000000009 R09: 0000000000001000 [ 44.297238] R10: 0000000000000812 R11: 0000000000000206 R12: 00005575f91d0ec0 [ 44.298148] R13: 00007ffea9440b50 R14: 00007ffea9440b80 R15: 00007ffea9440ee0 [ 44.299036] [ 44.299340] [ 44.299559] Allocated by task 212: [ 44.300001] kasan_save_stack+0x22/0x50 [ 44.300522] kasan_set_track+0x25/0x30 [ 44.301037] __kasan_slab_alloc+0x59/0x70 [ 44.301577] kmem_cache_alloc+0x16b/0x370 [ 44.302133] vm_area_dup+0x20/0x160 [ 44.302601] __split_vma+0x170/0x950 [ 44.303080] split_vma+0xc6/0x110 [ 44.303530] mprotect_fixup+0x8d2/0xb30 [ 44.304045] do_mprotect_pkey+0x87e/0xd40 [ 44.304588] __x64_sys_mprotect+0x78/0xc0 [ 44.305121] do_syscall_64+0x3f/0x90 [ 44.305607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.306292] [ 44.306510] Freed by task 200: [ 44.306911] kasan_save_stack+0x22/0x50 [ 44.307432] kasan_set_track+0x25/0x30 [ 44.307937] kasan_save_free_info+0x2b/0x50 [ 44.308492] __kasan_slab_free+0x10a/0x190 [ 44.309038] kmem_cache_free+0x10d/0x4d0 [ 44.309560] rcu_core+0x8c8/0x2860 [ 44.310032] __do_softirq+0x1b7/0x7d4 [ 44.310521] [ 44.310739] Last potentially related work creation: [ 44.311339] kasan_save_stack+0x22/0x50 [ 44.311859] __kasan_record_aux_stack+0x8e/0xa0 [ 44.312452] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.313112] remove_vma+0x139/0x170 [ 44.313578] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.314177] do_vmi_munmap+0x1f1/0x2b0 [ 44.314676] __vm_munmap+0x138/0x3a0 [ 44.315164] __x64_sys_munmap+0x59/0x80 [ 44.315677] do_syscall_64+0x3f/0x90 [ 44.316164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.316823] [ 44.317051] The buggy address belongs to the object at ffff88801660ae80 [ 44.317051] which belongs to the cache vm_area_struct of size 168 [ 44.318587] The buggy address is located 88 bytes inside of [ 44.318587] freed 168-byte region [ffff88801660ae80, ffff88801660af28) [ 44.320043] [ 44.320265] The buggy address belongs to the physical page: [ 44.320945] page:00000000a73b6a6c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1660a [ 44.322077] memcg:ffff888017212201 [ 44.322515] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.323190] page_type: 0xffffffff() [ 44.323650] raw: 0100000000000200 ffff88800879fc80 ffffea000035efc0 dead000000000004 [ 44.324598] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017212201 [ 44.325536] page dumped because: kasan: bad access detected [ 44.326233] [ 44.326452] Memory state around the buggy address: [ 44.327054] ffff88801660ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 44.327932] ffff88801660ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 44.328810] >ffff88801660ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.329684] ^ [ 44.330443] ffff88801660af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 44.331322] ffff88801660af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 44.332201] ================================================================== [ 44.333162] Disabling lock debugging due to kernel taint [ 46.439763] BUG: Bad rss-counter state mm:00000000035cfcc5 type:MM_FILEPAGES val:33 [ 46.441010] BUG: Bad rss-counter state mm:00000000035cfcc5 type:MM_ANONPAGES val:22 [ 46.944175] BUG: Bad rss-counter state mm:00000000f846b77e type:MM_FILEPAGES val:33 [ 46.945342] BUG: Bad rss-counter state mm:00000000f846b77e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58295' (ECDSA) to the list of known hosts. 2023/06/20 07:55:44 fuzzer started 2023/06/20 07:55:44 dialing manager at localhost:44161 2023/06/20 07:55:44 checking machine... 2023/06/20 07:55:44 checking revisions... [ 47.707832] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:55:44 testing simple program... [ 47.762712] cgroup: Unknown subsys name 'net' [ 47.807251] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:55:23 Registers: info registers vcpu 0 RAX=0000001266f75980 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000012 RSI=ffff88806ce28140 RDI=000000000005387f RBP=ffff88806ce28140 RSP=ffff88806ce09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000ef1bd R11=ffff88806ce09ff8 R12=000000000005387f R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff811062a5 RFL=00000016 [----AP-] 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 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=00007f128370da10 CR3=000000000e59c000 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=2033343a35353a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a35353a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09b18 RCX=0000000000000001 RDX=1ffff1100d9e1363 RSI=ffffffff8118ddc3 RDI=ffff88806cf09b24 RBP=0000000000000007 RSP=ffff88806cf09a30 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000b5c92 R12=ffff88806cf09b18 R13=0000000000000000 R14=ffff8880170951c0 R15=ffff88800c6d2380 RIP=ffffffff813ad4d5 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 00007f35ae71f900 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=00007f35ae6fe020 CR3=000000000f084000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000