syzkaller login: [ 23.721950] BUG: Bad rss-counter state mm:0000000089d6f0b5 type:MM_FILEPAGES val:33 [ 23.723670] BUG: Bad rss-counter state mm:0000000089d6f0b5 type:MM_ANONPAGES val:22 [ 23.888126] ================================================================== [ 23.889068] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.890016] Read of size 8 at addr ffff888016e97c20 by task sshd/218 [ 23.890780] [ 23.891088] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.891950] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.892943] Call Trace: [ 23.893284] [ 23.893574] dump_stack_lvl+0x91/0xf0 [ 23.894059] print_report+0xcc/0x620 [ 23.894552] ? __virt_addr_valid+0x102/0x340 [ 23.895103] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.895733] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.896353] kasan_report+0xbe/0xf0 [ 23.896845] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.897465] vma_interval_tree_remove+0xc75/0xec0 [ 23.898066] vma_prepare+0xc54/0x11a0 [ 23.898545] __split_vma+0x5af/0x950 [ 23.899019] ? __pfx___split_vma+0x10/0x10 [ 23.899546] ? find_held_lock+0x2c/0x110 [ 23.900061] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.900637] ? lock_is_held_type+0x9f/0x120 [ 23.901171] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.901772] ? mtree_range_walk+0x632/0x900 [ 23.902403] ? mas_walk+0x5c7/0x7c0 [ 23.902981] do_vmi_munmap+0x1f1/0x2b0 [ 23.903573] mmap_region+0x1f9/0x2660 [ 23.904157] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.904791] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.905660] ? __pfx_lock_acquire+0x10/0x10 [ 23.906306] ? __pfx_mmap_region+0x10/0x10 [ 23.906943] ? security_mmap_addr+0x7d/0xa0 [ 23.907587] ? get_unmapped_area+0x1f5/0x3f0 [ 23.908258] do_mmap+0x854/0xf00 [ 23.908789] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.909390] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.910067] ksys_mmap_pgoff+0x3af/0x500 [ 23.910693] do_syscall_64+0x3f/0x90 [ 23.911274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.912058] RIP: 0033:0x7f6c60944d82 [ 23.912630] 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 [ 23.915218] RSP: 002b:00007ffdca716b18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.916312] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6c60944d82 [ 23.917339] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6c5fd7e000 [ 23.918371] RBP: 00007f6c5fd7e000 R08: 0000000000000009 R09: 0000000000001000 [ 23.919390] R10: 0000000000000812 R11: 0000000000000206 R12: 000055884dad2b20 [ 23.920419] R13: 00007ffdca716b30 R14: 00007ffdca716b60 R15: 00007ffdca716ec0 [ 23.921469] [ 23.921821] [ 23.922082] Allocated by task 211: [ 23.922610] kasan_save_stack+0x22/0x50 [ 23.923223] kasan_set_track+0x25/0x30 [ 23.923818] __kasan_slab_alloc+0x59/0x70 [ 23.924451] kmem_cache_alloc+0x16b/0x370 [ 23.925106] vm_area_dup+0x20/0x160 [ 23.925658] __split_vma+0x170/0x950 [ 23.926227] split_vma+0xc6/0x110 [ 23.926770] mprotect_fixup+0x8d2/0xb30 [ 23.927384] do_mprotect_pkey+0x87e/0xd40 [ 23.928022] __x64_sys_mprotect+0x78/0xc0 [ 23.928667] do_syscall_64+0x3f/0x90 [ 23.929255] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.930036] [ 23.930296] Freed by task 211: [ 23.930779] kasan_save_stack+0x22/0x50 [ 23.931381] kasan_set_track+0x25/0x30 [ 23.931974] kasan_save_free_info+0x2b/0x50 [ 23.932629] __kasan_slab_free+0x10a/0x190 [ 23.933272] kmem_cache_free+0x10d/0x4d0 [ 23.933886] rcu_core+0x8c8/0x2860 [ 23.934416] __do_softirq+0x1b7/0x7d4 [ 23.934996] [ 23.935256] Last potentially related work creation: [ 23.935953] kasan_save_stack+0x22/0x50 [ 23.936575] __kasan_record_aux_stack+0x8e/0xa0 [ 23.937258] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.938004] remove_vma+0x139/0x170 [ 23.938527] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.939168] do_vmi_munmap+0x1f1/0x2b0 [ 23.939733] __vm_munmap+0x138/0x3a0 [ 23.940359] __x64_sys_munmap+0x59/0x80 [ 23.940992] do_syscall_64+0x3f/0x90 [ 23.941547] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.942296] [ 23.942552] The buggy address belongs to the object at ffff888016e97bc8 [ 23.942552] which belongs to the cache vm_area_struct of size 168 [ 23.944276] The buggy address is located 88 bytes inside of [ 23.944276] freed 168-byte region [ffff888016e97bc8, ffff888016e97c70) [ 23.945969] [ 23.946235] The buggy address belongs to the physical page: [ 23.947028] page:00000000701edd9a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16e97 [ 23.948337] memcg:ffff88800cb20e01 [ 23.948857] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.949617] page_type: 0xffffffff() [ 23.950157] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.951247] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb20e01 [ 23.952320] page dumped because: kasan: bad access detected [ 23.953115] [ 23.953367] Memory state around the buggy address: [ 23.954051] ffff888016e97b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.955050] ffff888016e97b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 23.956073] >ffff888016e97c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 23.957095] ^ [ 23.957734] ffff888016e97c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 23.958761] ffff888016e97d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 23.959784] ================================================================== [ 23.961256] Disabling lock debugging due to kernel taint [ 26.139213] BUG: Bad rss-counter state mm:00000000da7a2670 type:MM_FILEPAGES val:33 [ 26.140237] BUG: Bad rss-counter state mm:00000000da7a2670 type:MM_ANONPAGES val:22 [ 26.546248] BUG: Bad rss-counter state mm:00000000a811101c type:MM_FILEPAGES val:33 [ 26.547329] BUG: Bad rss-counter state mm:00000000a811101c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6375' (ECDSA) to the list of known hosts. 2023/06/20 18:35:37 fuzzer started 2023/06/20 18:35:37 dialing manager at localhost:36067 2023/06/20 18:35:37 checking machine... 2023/06/20 18:35:37 checking revisions... [ 27.280440] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:35:37 testing simple program... [ 27.337877] cgroup: Unknown subsys name 'net' [ 27.381992] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:35:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff860f2848 RDX=1ffff1100d9c1353 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860f284c R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000151d9 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88800fc47d08 R15=ffff88806ce09a98 RIP=ffffffff81131271 RFL=00000216 [----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 00007f92b171f900 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=00007f92b1cd6618 CR3=000000000ed3a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fad50b80b90 CR3=000000000f138000 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=caff649ddf8d5c9f0641d03c82989a57 XMM02=000000000011a5d8ec2efd57dc4c00df XMM03=00000000001210585ee8b0a4de5fecbe XMM04=1f3568aae93c944300000000000ae988 XMM05=751b9502027dc0b90000000000130ec0 XMM06=cdd4d4f71adbe0a7000000000012f930 XMM07=e042d86d42eb936e0000000000121330 XMM08=5ee8b0a4de5fecbe000000000011a638 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000