syzkaller login: [ 39.214505] BUG: Bad rss-counter state mm:0000000017ae5fc1 type:MM_FILEPAGES val:33 [ 39.215719] BUG: Bad rss-counter state mm:0000000017ae5fc1 type:MM_ANONPAGES val:22 [ 39.252976] ================================================================== [ 39.253873] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.254781] Read of size 8 at addr ffff88800dc0e6b0 by task sshd/218 [ 39.255590] [ 39.255804] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.256607] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.257540] Call Trace: [ 39.257838] [ 39.258131] dump_stack_lvl+0x91/0xf0 [ 39.258592] print_report+0xcc/0x620 [ 39.259053] ? __virt_addr_valid+0x102/0x340 [ 39.259575] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.260157] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.260742] kasan_report+0xbe/0xf0 [ 39.261192] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.261776] vma_interval_tree_remove+0xc75/0xec0 [ 39.262347] vma_prepare+0xc54/0x11a0 [ 39.262805] __split_vma+0x5af/0x950 [ 39.263280] ? __pfx___split_vma+0x10/0x10 [ 39.263799] ? find_held_lock+0x2c/0x110 [ 39.264314] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.264880] ? lock_is_held_type+0x9f/0x120 [ 39.265415] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.266047] ? mtree_range_walk+0x632/0x900 [ 39.266599] ? mas_walk+0x5c7/0x7c0 [ 39.267075] do_vmi_munmap+0x1f1/0x2b0 [ 39.267560] mmap_region+0x1f9/0x2660 [ 39.268047] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.268548] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.269252] ? __pfx_lock_acquire+0x10/0x10 [ 39.269784] ? __pfx_mmap_region+0x10/0x10 [ 39.270316] ? security_mmap_addr+0x7d/0xa0 [ 39.270837] ? get_unmapped_area+0x1f5/0x3f0 [ 39.271386] do_mmap+0x854/0xf00 [ 39.271823] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.272326] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.272876] ksys_mmap_pgoff+0x3af/0x500 [ 39.273387] do_syscall_64+0x3f/0x90 [ 39.273853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.274514] RIP: 0033:0x7fcf9b862d82 [ 39.274969] 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 [ 39.277076] RSP: 002b:00007ffffe591d48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.277997] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcf9b862d82 [ 39.278831] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcf9ac9c000 [ 39.279680] RBP: 00007fcf9ac9c000 R08: 0000000000000009 R09: 0000000000001000 [ 39.280511] R10: 0000000000000812 R11: 0000000000000206 R12: 00005568e9a86f70 [ 39.281350] R13: 00007ffffe591d60 R14: 00007ffffe591d90 R15: 00007ffffe5920f0 [ 39.282209] [ 39.282492] [ 39.282698] Allocated by task 211: [ 39.283118] kasan_save_stack+0x22/0x50 [ 39.283611] kasan_set_track+0x25/0x30 [ 39.284100] __kasan_slab_alloc+0x59/0x70 [ 39.284612] kmem_cache_alloc+0x16b/0x370 [ 39.285129] vm_area_dup+0x20/0x160 [ 39.285572] __split_vma+0x170/0x950 [ 39.286046] split_vma+0xc6/0x110 [ 39.286476] mprotect_fixup+0x8d2/0xb30 [ 39.286977] do_mprotect_pkey+0x87e/0xd40 [ 39.287498] __x64_sys_mprotect+0x78/0xc0 [ 39.288024] do_syscall_64+0x3f/0x90 [ 39.288496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.289137] [ 39.289354] Freed by task 211: [ 39.289745] kasan_save_stack+0x22/0x50 [ 39.290246] kasan_set_track+0x25/0x30 [ 39.290730] kasan_save_free_info+0x2b/0x50 [ 39.291267] __kasan_slab_free+0x10a/0x190 [ 39.291800] kmem_cache_free+0x10d/0x4d0 [ 39.292312] rcu_core+0x8c8/0x2860 [ 39.292751] __do_softirq+0x1b7/0x7d4 [ 39.293220] [ 39.293428] Last potentially related work creation: [ 39.294007] kasan_save_stack+0x22/0x50 [ 39.294501] __kasan_record_aux_stack+0x8e/0xa0 [ 39.295064] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.295695] remove_vma+0x139/0x170 [ 39.296151] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.296702] do_vmi_munmap+0x1f1/0x2b0 [ 39.297187] __vm_munmap+0x138/0x3a0 [ 39.297644] __x64_sys_munmap+0x59/0x80 [ 39.298163] do_syscall_64+0x3f/0x90 [ 39.298628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.299270] [ 39.299477] Second to last potentially related work creation: [ 39.300158] kasan_save_stack+0x22/0x50 [ 39.300649] __kasan_record_aux_stack+0x8e/0xa0 [ 39.301215] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.301848] remove_vma+0x139/0x170 [ 39.302311] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.302862] do_vmi_munmap+0x1f1/0x2b0 [ 39.303355] mmap_region+0x1f9/0x2660 [ 39.303834] do_mmap+0x854/0xf00 [ 39.304262] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.304741] ksys_mmap_pgoff+0x3af/0x500 [ 39.305248] do_syscall_64+0x3f/0x90 [ 39.305718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.306374] [ 39.306585] The buggy address belongs to the object at ffff88800dc0e658 [ 39.306585] which belongs to the cache vm_area_struct of size 168 [ 39.308033] The buggy address is located 88 bytes inside of [ 39.308033] freed 168-byte region [ffff88800dc0e658, ffff88800dc0e700) [ 39.309436] [ 39.309642] The buggy address belongs to the physical page: [ 39.310324] page:000000006ccf37ab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc0e [ 39.311406] memcg:ffff88800e1fde01 [ 39.311828] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.312527] page_type: 0xffffffff() [ 39.312963] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 39.313883] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1fde01 [ 39.314786] page dumped because: kasan: bad access detected [ 39.315444] [ 39.315658] Memory state around the buggy address: [ 39.316231] ffff88800dc0e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.317089] ffff88800dc0e600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.317950] >ffff88800dc0e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.318798] ^ [ 39.319379] ffff88800dc0e700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 39.320224] ffff88800dc0e780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 39.321059] ================================================================== [ 39.322090] Disabling lock debugging due to kernel taint [ 42.106160] BUG: Bad rss-counter state mm:000000000eb292bd type:MM_FILEPAGES val:33 [ 42.107201] BUG: Bad rss-counter state mm:000000000eb292bd type:MM_ANONPAGES val:22 [ 42.648126] BUG: Bad rss-counter state mm:00000000794b700e type:MM_FILEPAGES val:33 [ 42.649292] BUG: Bad rss-counter state mm:00000000794b700e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23179' (ECDSA) to the list of known hosts. 2023/06/20 20:20:51 fuzzer started 2023/06/20 20:20:51 dialing manager at localhost:36067 2023/06/20 20:20:51 checking machine... 2023/06/20 20:20:51 checking revisions... [ 43.288496] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:20:51 testing simple program... [ 43.333121] cgroup: Unknown subsys name 'net' [ 43.381956] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:20:50 Registers: info registers vcpu 0 RAX=00007ffc3c4f5670 RBX=00000000000000e1 RCX=00007ffc3c4f6000 RDX=00007ffc3c4f7980 RSI=0000000000000000 RDI=00007ffc3c4f5670 RBP=00000000000000f4 RSP=fffffe0000002fd0 R8 =00007ffc3c4f9d14 R9 =00007ffc3c4f9bd0 R10=00007f575ecd5a57 R11=0000000000000000 R12=0000000000000008 R13=00007ffc3c4f5670 R14=00007ffc3c4f9e40 R15=0000000000000452 RIP=ffffffff84601260 RFL=00000002 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f575e185900 00000000 00000000 GS =0000 0000000000000000 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=00007ffc3c4f6000 CR3=0000000014536000 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=00000000000000000000000000000000 XMM02=00000000ff00000000000000000000ff XMM03=3052c7facbd1b2e060c75763c4ed0239 XMM04=ce97b1cc7fbd0e149bf2681f4b319d34 XMM05=00000000ff00000000000000000000ff XMM06=3052b1cc7fbd0e1460c7571f4b310234 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007f040cf0cd80 CR3=000000000de60000 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=8b18e13825b46689104ac9c851904b11 XMM02=2c67c8bc2e329bc3000000000011b5f0 XMM03=fb795ef6d65770560000000000121f90 XMM04=f7047e988db4549400000000000ae988 XMM05=19e9129bd510f23500000000001337c8 XMM06=eb773198afa4fb560000000000132078 XMM07=e042d86d42eb936e0000000000122268 XMM08=e57a2d21ba64d1fd000000000011b650 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000