syzkaller login: [ 43.209366] BUG: Bad rss-counter state mm:0000000012736cad type:MM_FILEPAGES val:33 [ 43.211099] BUG: Bad rss-counter state mm:0000000012736cad type:MM_ANONPAGES val:22 [ 43.377765] ================================================================== [ 43.378470] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.379162] Read of size 8 at addr ffff88800c78ec20 by task sshd/221 [ 43.379721] [ 43.379883] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.380547] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.381255] Call Trace: [ 43.381592] [ 43.381850] dump_stack_lvl+0x91/0xf0 [ 43.382219] print_report+0xcc/0x620 [ 43.382580] ? __virt_addr_valid+0x102/0x340 [ 43.382997] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.383450] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.383915] kasan_report+0xbe/0xf0 [ 43.384257] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.384705] vma_interval_tree_remove+0xc75/0xec0 [ 43.385150] vma_prepare+0xc54/0x11a0 [ 43.385507] __split_vma+0x5af/0x950 [ 43.385846] ? __pfx___split_vma+0x10/0x10 [ 43.386230] ? find_held_lock+0x2c/0x110 [ 43.386611] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.387032] ? lock_is_held_type+0x9f/0x120 [ 43.387441] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.387887] ? mtree_range_walk+0x632/0x900 [ 43.388285] ? mas_walk+0x5c7/0x7c0 [ 43.388637] do_vmi_munmap+0x1f1/0x2b0 [ 43.388997] mmap_region+0x1f9/0x2660 [ 43.389356] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.389723] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.390243] ? __pfx_lock_acquire+0x10/0x10 [ 43.390638] ? __pfx_mmap_region+0x10/0x10 [ 43.391066] ? security_mmap_addr+0x7d/0xa0 [ 43.391460] ? get_unmapped_area+0x1f5/0x3f0 [ 43.391875] do_mmap+0x854/0xf00 [ 43.392195] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.392567] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.392995] ksys_mmap_pgoff+0x3af/0x500 [ 43.393364] do_syscall_64+0x3f/0x90 [ 43.393705] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.394207] RIP: 0033:0x7f756ebebd82 [ 43.394547] 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 [ 43.396124] RSP: 002b:00007fff045818b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.396792] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f756ebebd82 [ 43.397432] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f756e025000 [ 43.398071] RBP: 00007f756e025000 R08: 0000000000000009 R09: 0000000000001000 [ 43.398712] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557084126ec0 [ 43.399347] R13: 00007fff045818d0 R14: 00007fff04581900 R15: 00007fff04581c60 [ 43.399993] [ 43.400214] [ 43.400377] Allocated by task 214: [ 43.400701] kasan_save_stack+0x22/0x50 [ 43.401078] kasan_set_track+0x25/0x30 [ 43.401457] __kasan_slab_alloc+0x59/0x70 [ 43.401850] kmem_cache_alloc+0x16b/0x370 [ 43.402232] vm_area_dup+0x20/0x160 [ 43.402572] __split_vma+0x170/0x950 [ 43.402936] split_vma+0xc6/0x110 [ 43.403253] mprotect_fixup+0x8d2/0xb30 [ 43.403636] do_mprotect_pkey+0x87e/0xd40 [ 43.404031] __x64_sys_mprotect+0x78/0xc0 [ 43.404409] do_syscall_64+0x3f/0x90 [ 43.404755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.405233] [ 43.405392] Freed by task 214: [ 43.405678] kasan_save_stack+0x22/0x50 [ 43.406080] kasan_set_track+0x25/0x30 [ 43.406478] kasan_save_free_info+0x2b/0x50 [ 43.407130] __kasan_slab_free+0x10a/0x190 [ 43.407794] kmem_cache_free+0x10d/0x4d0 [ 43.408425] rcu_core+0x8c8/0x2860 [ 43.408976] __do_softirq+0x1b7/0x7d4 [ 43.409563] [ 43.409828] Last potentially related work creation: [ 43.410554] kasan_save_stack+0x22/0x50 [ 43.411216] __kasan_record_aux_stack+0x8e/0xa0 [ 43.411929] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.412732] remove_vma+0x139/0x170 [ 43.413292] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.413980] do_vmi_munmap+0x1f1/0x2b0 [ 43.414594] __vm_munmap+0x138/0x3a0 [ 43.415186] __x64_sys_munmap+0x59/0x80 [ 43.415800] do_syscall_64+0x3f/0x90 [ 43.416380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.417172] [ 43.417442] The buggy address belongs to the object at ffff88800c78ebc8 [ 43.417442] which belongs to the cache vm_area_struct of size 168 [ 43.419280] The buggy address is located 88 bytes inside of [ 43.419280] freed 168-byte region [ffff88800c78ebc8, ffff88800c78ec70) [ 43.421024] [ 43.421296] The buggy address belongs to the physical page: [ 43.422122] page:000000008fbd5305 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc78e [ 43.423571] memcg:ffff88800fe2b701 [ 43.424050] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.424791] page_type: 0xffffffff() [ 43.425303] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 43.426366] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe2b701 [ 43.427428] page dumped because: kasan: bad access detected [ 43.428195] [ 43.428442] Memory state around the buggy address: [ 43.429117] ffff88800c78eb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.430101] ffff88800c78eb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 43.431093] >ffff88800c78ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 43.432078] ^ [ 43.432676] ffff88800c78ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 43.433630] ffff88800c78ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 43.434603] ================================================================== [ 43.435687] Disabling lock debugging due to kernel taint [ 45.816833] BUG: Bad rss-counter state mm:00000000c0627189 type:MM_FILEPAGES val:33 [ 45.817602] BUG: Bad rss-counter state mm:00000000c0627189 type:MM_ANONPAGES val:22 [ 46.263060] BUG: Bad rss-counter state mm:00000000fc8695cb type:MM_FILEPAGES val:33 [ 46.263850] BUG: Bad rss-counter state mm:00000000fc8695cb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40160' (ECDSA) to the list of known hosts. 2023/06/20 07:01:31 fuzzer started 2023/06/20 07:01:31 dialing manager at localhost:44161 2023/06/20 07:01:31 checking machine... 2023/06/20 07:01:31 checking revisions... [ 46.916892] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:01:31 testing simple program... [ 46.955012] cgroup: Unknown subsys name 'net' [ 47.004842] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:01:19 Registers: info registers vcpu 0 RAX=ffffed100206ff39 RBX=00000000000001d0 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81803a7c RDI=ffffffff8560b640 RBP=1ffff1100206ff39 RSP=ffff88801037f9b8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff81803a7c R14=0000000000000001 R15=0000000000000dc0 RIP=ffffffff812d8659 RFL=00000286 [--S--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 00007f0d5c764900 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=00007f0d5bb5f570 CR3=000000000c76c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=7b033c5173791e4800000000000ae988 XMM05=3e7d6f66b17391160000000000135b88 XMM06=c291bd5c70af25b90000000000134978 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806c400000 RBX=00000000011b8841 RCX=ffff88806c9c4208 RDX=000000000000000c RSI=0000000000000003 RDI=0000000032b70cce RBP=ffff8880101dbe70 RSP=ffff888019f97740 R8 =00000000957acb3c R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff888019f977a8 R15=000000000000000c RIP=ffffffff82270f13 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 00007f3eb51b7900 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=00007f3eb5196020 CR3=000000000e4b6000 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