syzkaller login: [ 30.771664] BUG: Bad rss-counter state mm:00000000097e5365 type:MM_FILEPAGES val:33 [ 30.772898] BUG: Bad rss-counter state mm:00000000097e5365 type:MM_ANONPAGES val:22 [ 30.810109] ================================================================== [ 30.811067] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.812035] Read of size 8 at addr ffff88800e919c20 by task sshd/220 [ 30.812830] [ 30.813050] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.813952] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.814988] Call Trace: [ 30.815319] [ 30.815611] dump_stack_lvl+0x91/0xf0 [ 30.816115] print_report+0xcc/0x620 [ 30.816619] ? __virt_addr_valid+0x102/0x340 [ 30.817198] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.817861] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.818513] kasan_report+0xbe/0xf0 [ 30.819004] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.819660] vma_interval_tree_remove+0xc75/0xec0 [ 30.820293] vma_prepare+0xc54/0x11a0 [ 30.820800] __split_vma+0x5af/0x950 [ 30.821289] ? __pfx___split_vma+0x10/0x10 [ 30.821861] ? find_held_lock+0x2c/0x110 [ 30.822407] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.822995] ? lock_is_held_type+0x9f/0x120 [ 30.823549] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.824186] ? mtree_range_walk+0x632/0x900 [ 30.824755] ? mas_walk+0x5c7/0x7c0 [ 30.825244] do_vmi_munmap+0x1f1/0x2b0 [ 30.825776] mmap_region+0x1f9/0x2660 [ 30.826284] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.826811] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.827549] ? __pfx_lock_acquire+0x10/0x10 [ 30.828109] ? __pfx_mmap_region+0x10/0x10 [ 30.828667] ? security_mmap_addr+0x7d/0xa0 [ 30.829225] ? get_unmapped_area+0x1f5/0x3f0 [ 30.829811] do_mmap+0x854/0xf00 [ 30.830264] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.830779] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.831368] ksys_mmap_pgoff+0x3af/0x500 [ 30.831893] do_syscall_64+0x3f/0x90 [ 30.832384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.833059] RIP: 0033:0x7efdf80fad82 [ 30.833545] 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 [ 30.835791] RSP: 002b:00007fffdb112db8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.836747] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efdf80fad82 [ 30.837763] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efdf7534000 [ 30.838603] RBP: 00007efdf7534000 R08: 0000000000000009 R09: 0000000000001000 [ 30.839447] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558c44b9eec0 [ 30.840303] R13: 00007fffdb112dd0 R14: 00007fffdb112e00 R15: 00007fffdb113160 [ 30.841158] [ 30.841459] [ 30.841677] Allocated by task 213: [ 30.842099] kasan_save_stack+0x22/0x50 [ 30.842599] kasan_set_track+0x25/0x30 [ 30.843093] __kasan_slab_alloc+0x59/0x70 [ 30.843612] kmem_cache_alloc+0x16b/0x370 [ 30.844130] vm_area_dup+0x20/0x160 [ 30.844582] __split_vma+0x170/0x950 [ 30.845041] split_vma+0xc6/0x110 [ 30.845484] mprotect_fixup+0x8d2/0xb30 [ 30.845991] do_mprotect_pkey+0x87e/0xd40 [ 30.846513] __x64_sys_mprotect+0x78/0xc0 [ 30.847042] do_syscall_64+0x3f/0x90 [ 30.847536] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.848196] [ 30.848415] Freed by task 213: [ 30.848818] kasan_save_stack+0x22/0x50 [ 30.849333] kasan_set_track+0x25/0x30 [ 30.849862] kasan_save_free_info+0x2b/0x50 [ 30.850410] __kasan_slab_free+0x10a/0x190 [ 30.850960] kmem_cache_free+0x10d/0x4d0 [ 30.851491] rcu_core+0x8c8/0x2860 [ 30.851944] __do_softirq+0x1b7/0x7d4 [ 30.852437] [ 30.852659] Last potentially related work creation: [ 30.853256] kasan_save_stack+0x22/0x50 [ 30.853783] __kasan_record_aux_stack+0x8e/0xa0 [ 30.854376] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.855035] remove_vma+0x139/0x170 [ 30.855517] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.856097] do_vmi_munmap+0x1f1/0x2b0 [ 30.856598] __vm_munmap+0x138/0x3a0 [ 30.857081] __x64_sys_munmap+0x59/0x80 [ 30.857611] do_syscall_64+0x3f/0x90 [ 30.858096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.858764] [ 30.858983] The buggy address belongs to the object at ffff88800e919bc8 [ 30.858983] which belongs to the cache vm_area_struct of size 168 [ 30.860494] The buggy address is located 88 bytes inside of [ 30.860494] freed 168-byte region [ffff88800e919bc8, ffff88800e919c70) [ 30.861959] [ 30.862182] The buggy address belongs to the physical page: [ 30.862855] page:0000000063dbf29c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe919 [ 30.863973] memcg:ffff888019d6f201 [ 30.864411] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.865085] page_type: 0xffffffff() [ 30.865559] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.866500] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d6f201 [ 30.867431] page dumped because: kasan: bad access detected [ 30.868114] [ 30.868334] Memory state around the buggy address: [ 30.868930] ffff88800e919b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.869835] ffff88800e919b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.870722] >ffff88800e919c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.871605] ^ [ 30.872157] ffff88800e919c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.873045] ffff88800e919d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.873925] ================================================================== [ 30.875135] Disabling lock debugging due to kernel taint [ 33.026361] BUG: Bad rss-counter state mm:000000002bac12fa type:MM_FILEPAGES val:33 [ 33.027342] BUG: Bad rss-counter state mm:000000002bac12fa type:MM_ANONPAGES val:22 [ 33.403928] BUG: Bad rss-counter state mm:000000008d691ce3 type:MM_FILEPAGES val:33 [ 33.404918] BUG: Bad rss-counter state mm:000000008d691ce3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1883' (ECDSA) to the list of known hosts. 2023/06/19 15:46:20 fuzzer started 2023/06/19 15:46:20 dialing manager at localhost:44161 2023/06/19 15:46:20 checking machine... 2023/06/19 15:46:20 checking revisions... [ 34.131392] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:46:20 testing simple program... [ 34.182791] cgroup: Unknown subsys name 'net' [ 34.231362] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:46:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800f5d7900 RCX=0000000000000000 RDX=ffff8880159d0000 RSI=ffffffff81eefa7c RDI=0000000000000005 RBP=ffff88800f5d7900 RSP=ffff88800da97db0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffff88800f5d7a80 R14=ffff88800f5d7a80 R15=0000000000000000 RIP=ffffffff81eefa81 RFL=00000293 [--S-A-C] 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 00007ff40aa48900 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=00007ffcffd86ff8 CR3=000000000d92e000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f2401f46050 CR3=000000000d678000 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=3b320c02a1b12bac584b4abba1ad4057 XMM02=0000000000122e60ec2efd57dc4c00df XMM03=0000000000126650d98a44288771d04d XMM04=2e1b0cee68954c4700000000000ae988 XMM05=e4cb8bb95a7664b60000000000135a70 XMM06=497fb4fe268a66c900000000001348d8 XMM07=e042d86d42eb936e00000000001268d0 XMM08=d98a44288771d04d0000000000122ec0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000