syzkaller login: [ 38.667734] BUG: Bad rss-counter state mm:00000000a83cccda type:MM_FILEPAGES val:33 [ 38.669754] BUG: Bad rss-counter state mm:00000000a83cccda type:MM_ANONPAGES val:22 [ 38.826870] ================================================================== [ 38.827824] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.828817] Read of size 8 at addr ffff88800da19d08 by task sshd/220 [ 38.829694] [ 38.829944] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.830855] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.831885] Call Trace: [ 38.832221] [ 38.832542] dump_stack_lvl+0x91/0xf0 [ 38.833077] print_report+0xcc/0x620 [ 38.833581] ? __virt_addr_valid+0x102/0x340 [ 38.834188] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.834844] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.835485] kasan_report+0xbe/0xf0 [ 38.835993] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.836635] vma_interval_tree_remove+0xc75/0xec0 [ 38.837256] vma_prepare+0xc54/0x11a0 [ 38.837760] __split_vma+0x5af/0x950 [ 38.838300] ? __pfx___split_vma+0x10/0x10 [ 38.838871] ? find_held_lock+0x2c/0x110 [ 38.839425] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.840031] ? lock_is_held_type+0x9f/0x120 [ 38.840612] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.841241] ? mtree_range_walk+0x632/0x900 [ 38.841845] ? mas_walk+0x5c7/0x7c0 [ 38.842348] do_vmi_munmap+0x1f1/0x2b0 [ 38.842873] mmap_region+0x1f9/0x2660 [ 38.843377] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.843919] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.844679] ? __pfx_lock_acquire+0x10/0x10 [ 38.845238] ? __pfx_mmap_region+0x10/0x10 [ 38.845824] ? security_mmap_addr+0x7d/0xa0 [ 38.846388] ? get_unmapped_area+0x1f5/0x3f0 [ 38.846980] do_mmap+0x854/0xf00 [ 38.847437] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.847952] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.848542] ksys_mmap_pgoff+0x3af/0x500 [ 38.849085] do_syscall_64+0x3f/0x90 [ 38.849591] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.850291] RIP: 0033:0x7f631f819d82 [ 38.850769] 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 [ 38.852967] RSP: 002b:00007fff38faa658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.853925] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f631f819d82 [ 38.854820] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f631ec53000 [ 38.855706] RBP: 00007f631ec53000 R08: 0000000000000009 R09: 0000000000001000 [ 38.856594] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e40e06bec0 [ 38.857486] R13: 00007fff38faa670 R14: 00007fff38faa6a0 R15: 00007fff38faaa00 [ 38.858398] [ 38.858709] [ 38.858931] Allocated by task 213: [ 38.859386] kasan_save_stack+0x22/0x50 [ 38.859913] kasan_set_track+0x25/0x30 [ 38.860445] __kasan_slab_alloc+0x59/0x70 [ 38.860991] kmem_cache_alloc+0x16b/0x370 [ 38.861542] vm_area_dup+0x20/0x160 [ 38.862032] __split_vma+0x170/0x950 [ 38.862527] split_vma+0xc6/0x110 [ 38.862990] mprotect_fixup+0x8d2/0xb30 [ 38.863523] do_mprotect_pkey+0x87e/0xd40 [ 38.864065] __x64_sys_mprotect+0x78/0xc0 [ 38.864612] do_syscall_64+0x3f/0x90 [ 38.865107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.865789] [ 38.866022] Freed by task 213: [ 38.866449] kasan_save_stack+0x22/0x50 [ 38.866976] kasan_set_track+0x25/0x30 [ 38.867506] kasan_save_free_info+0x2b/0x50 [ 38.868071] __kasan_slab_free+0x10a/0x190 [ 38.868642] kmem_cache_free+0x10d/0x4d0 [ 38.869177] rcu_core+0x8c8/0x2860 [ 38.869653] __do_softirq+0x1b7/0x7d4 [ 38.870178] [ 38.870409] Last potentially related work creation: [ 38.871026] kasan_save_stack+0x22/0x50 [ 38.871560] __kasan_record_aux_stack+0x8e/0xa0 [ 38.872180] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.872854] remove_vma+0x139/0x170 [ 38.873330] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.873920] do_vmi_munmap+0x1f1/0x2b0 [ 38.874428] __vm_munmap+0x138/0x3a0 [ 38.874915] __x64_sys_munmap+0x59/0x80 [ 38.875431] do_syscall_64+0x3f/0x90 [ 38.875938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.876621] [ 38.876855] The buggy address belongs to the object at ffff88800da19cb0 [ 38.876855] which belongs to the cache vm_area_struct of size 168 [ 38.878428] The buggy address is located 88 bytes inside of [ 38.878428] freed 168-byte region [ffff88800da19cb0, ffff88800da19d58) [ 38.879893] [ 38.880121] The buggy address belongs to the physical page: [ 38.880800] page:00000000f32797c7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda19 [ 38.881944] memcg:ffff88800d127401 [ 38.882395] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.883131] page_type: 0xffffffff() [ 38.883597] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.884553] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d127401 [ 38.885506] page dumped because: kasan: bad access detected [ 38.886208] [ 38.886440] Memory state around the buggy address: [ 38.887039] ffff88800da19c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.887933] ffff88800da19c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.888840] >ffff88800da19d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.889726] ^ [ 38.890206] ffff88800da19d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.891093] ffff88800da19e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.892000] ================================================================== [ 38.893021] Disabling lock debugging due to kernel taint [ 40.867798] BUG: Bad rss-counter state mm:000000004055f75c type:MM_FILEPAGES val:33 [ 40.869125] BUG: Bad rss-counter state mm:000000004055f75c type:MM_ANONPAGES val:22 [ 41.384105] BUG: Bad rss-counter state mm:00000000af0360db type:MM_FILEPAGES val:33 [ 41.385691] BUG: Bad rss-counter state mm:00000000af0360db type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23035' (ECDSA) to the list of known hosts. 2023/06/21 04:40:36 fuzzer started 2023/06/21 04:40:37 dialing manager at localhost:36067 2023/06/21 04:40:37 checking machine... 2023/06/21 04:40:37 checking revisions... [ 42.183755] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:40:37 testing simple program... [ 42.225678] cgroup: Unknown subsys name 'net' [ 42.276287] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:40:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85fa4c04 RCX=ffffffff83636c05 RDX=000000000000000c RSI=ffffffff863b3050 RDI=ffffffff85fa4bf4 RBP=ffffffff85fa4bf4 RSP=ffff8880147a7518 R8 =ffffffff863b3050 R9 =ffff8880147a7610 R10=0000000000038001 R11=000000000008a88c R12=ffffffff85fa4c00 R13=ffffffff85fa4bf4 R14=ffffffff85fa4bf4 R15=dffffc0000000000 RIP=ffffffff8112fc64 RFL=00000256 [---ZAP-] 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 00007faa48858900 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=00007faa47cd77e0 CR3=000000000c774000 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=ef6312a62067a98800000000000ae988 XMM05=c5d125b0e5d9f3920000000000132c10 XMM06=d51da044b79ad92a0000000000131948 XMM07=fb795ef6d65770560000000000121e70 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff863b356c RDX=0000000000000008 RSI=ffff88801954ff18 RDI=ffff88801954f960 RBP=ffff88801954f9b8 RSP=ffff88801954f8e8 R8 =ffffffff863b3570 R9 =ffff88801954f9a0 R10=0000000000038001 R11=000000000008a95e R12=ffff88801954f9c0 R13=ffff88801954f9a8 R14=ffff88801954ff20 R15=ffff88801954f960 RIP=ffffffff811303f0 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 00007f0b11b80900 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=00007fffc69a8000 CR3=000000001cd96000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000