syzkaller login: [ 30.969325] BUG: Bad rss-counter state mm:00000000bbc15e65 type:MM_FILEPAGES val:33 [ 30.970381] BUG: Bad rss-counter state mm:00000000bbc15e65 type:MM_ANONPAGES val:22 [ 31.139188] ================================================================== [ 31.140107] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.141138] Read of size 8 at addr ffff888017f0c798 by task sshd/220 [ 31.141903] [ 31.142124] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.142988] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.144019] Call Trace: [ 31.144341] [ 31.144626] dump_stack_lvl+0x91/0xf0 [ 31.145122] print_report+0xcc/0x620 [ 31.145615] ? __virt_addr_valid+0x102/0x340 [ 31.146168] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.146782] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.147401] kasan_report+0xbe/0xf0 [ 31.147883] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.148511] vma_interval_tree_remove+0xc75/0xec0 [ 31.149107] vma_prepare+0xc54/0x11a0 [ 31.149584] __split_vma+0x5af/0x950 [ 31.150052] ? __pfx___split_vma+0x10/0x10 [ 31.150581] ? find_held_lock+0x2c/0x110 [ 31.151127] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.151696] ? lock_is_held_type+0x9f/0x120 [ 31.152231] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.152843] ? mtree_range_walk+0x632/0x900 [ 31.153393] ? mas_walk+0x5c7/0x7c0 [ 31.153865] do_vmi_munmap+0x1f1/0x2b0 [ 31.154359] mmap_region+0x1f9/0x2660 [ 31.154836] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.155363] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.156073] ? __pfx_lock_acquire+0x10/0x10 [ 31.156605] ? __pfx_mmap_region+0x10/0x10 [ 31.157131] ? security_mmap_addr+0x7d/0xa0 [ 31.157664] ? get_unmapped_area+0x1f5/0x3f0 [ 31.158213] do_mmap+0x854/0xf00 [ 31.158651] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.159184] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.159747] ksys_mmap_pgoff+0x3af/0x500 [ 31.160256] do_syscall_64+0x3f/0x90 [ 31.160745] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.161399] RIP: 0033:0x7f45ae144d82 [ 31.161853] 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 [ 31.163990] RSP: 002b:00007ffed76ca7b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.164900] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f45ae144d82 [ 31.165739] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f45ad57e000 [ 31.166582] RBP: 00007f45ad57e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.167449] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555930a77980 [ 31.168295] R13: 00007ffed76ca7d0 R14: 00007ffed76ca800 R15: 00007ffed76cab60 [ 31.169145] [ 31.169434] [ 31.169648] Allocated by task 213: [ 31.170078] kasan_save_stack+0x22/0x50 [ 31.170582] kasan_set_track+0x25/0x30 [ 31.171086] __kasan_slab_alloc+0x59/0x70 [ 31.171611] kmem_cache_alloc+0x16b/0x370 [ 31.172122] vm_area_dup+0x20/0x160 [ 31.172577] __split_vma+0x170/0x950 [ 31.173040] split_vma+0xc6/0x110 [ 31.173478] mprotect_fixup+0x8d2/0xb30 [ 31.173980] do_mprotect_pkey+0x87e/0xd40 [ 31.174498] __x64_sys_mprotect+0x78/0xc0 [ 31.175024] do_syscall_64+0x3f/0x90 [ 31.175515] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.176162] [ 31.176382] Freed by task 213: [ 31.176776] kasan_save_stack+0x22/0x50 [ 31.177274] kasan_set_track+0x25/0x30 [ 31.177772] kasan_save_free_info+0x2b/0x50 [ 31.178305] __kasan_slab_free+0x10a/0x190 [ 31.178845] kmem_cache_free+0x10d/0x4d0 [ 31.179377] rcu_core+0x8c8/0x2860 [ 31.179825] __do_softirq+0x1b7/0x7d4 [ 31.180306] [ 31.180522] Last potentially related work creation: [ 31.181108] kasan_save_stack+0x22/0x50 [ 31.181609] __kasan_record_aux_stack+0x8e/0xa0 [ 31.182178] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.182816] remove_vma+0x139/0x170 [ 31.183273] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.183830] do_vmi_munmap+0x1f1/0x2b0 [ 31.184320] __vm_munmap+0x138/0x3a0 [ 31.184783] __x64_sys_munmap+0x59/0x80 [ 31.185276] do_syscall_64+0x3f/0x90 [ 31.185753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.186395] [ 31.186609] The buggy address belongs to the object at ffff888017f0c740 [ 31.186609] which belongs to the cache vm_area_struct of size 168 [ 31.188087] The buggy address is located 88 bytes inside of [ 31.188087] freed 168-byte region [ffff888017f0c740, ffff888017f0c7e8) [ 31.189475] [ 31.189690] The buggy address belongs to the physical page: [ 31.190352] page:00000000bddf92e6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17f0c [ 31.191464] memcg:ffff888019c7e601 [ 31.191889] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.192539] page_type: 0xffffffff() [ 31.192985] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.193912] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c7e601 [ 31.194808] page dumped because: kasan: bad access detected [ 31.195469] [ 31.195688] Memory state around the buggy address: [ 31.196263] ffff888017f0c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.197115] ffff888017f0c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.197969] >ffff888017f0c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.198866] ^ [ 31.199394] ffff888017f0c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.200250] ffff888017f0c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.201100] ================================================================== [ 31.202155] Disabling lock debugging due to kernel taint [ 32.953430] BUG: Bad rss-counter state mm:0000000077a6c0c1 type:MM_FILEPAGES val:33 [ 32.954273] BUG: Bad rss-counter state mm:0000000077a6c0c1 type:MM_ANONPAGES val:22 [ 33.338409] BUG: Bad rss-counter state mm:00000000751f4403 type:MM_FILEPAGES val:33 [ 33.339097] BUG: Bad rss-counter state mm:00000000751f4403 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59648' (ECDSA) to the list of known hosts. 2023/06/21 02:35:28 fuzzer started 2023/06/21 02:35:28 dialing manager at localhost:36067 2023/06/21 02:35:28 checking machine... 2023/06/21 02:35:28 checking revisions... [ 33.975981] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:35:28 testing simple program... [ 34.009563] cgroup: Unknown subsys name 'net' [ 34.041830] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:35:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8453684b RDX=fffffbfff0adb095 RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff888016b47bd0 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=0000000000000001 R12=0000000000000003 R13=fffffbfff0adb094 R14=0000000000000001 R15=1ffff11002d68f7b RIP=ffffffff84536860 RFL=00000046 [---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 00007f9aa860c900 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=00007f9aa8bc40b0 CR3=000000000f510000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf2c250 RCX=ffffffff813bdb18 RDX=1ffff1100d9e584d RSI=00000000000031f0 RDI=0000000000000000 RBP=00000000000f4240 RSP=ffff88806cf09dc0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806cf09ff8 R12=00000000000031f0 R13=00000007bb692040 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff814c0438 RFL=00000006 [-----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 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=00007fe9f8a69010 CR3=000000000d7aa000 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=cc80750b37190ab532445833d92e1298 XMM02=ec2efd57dc4c00df000000000011c518 XMM03=35c74efcf8b46cfc000000000011c5e8 XMM04=b819a83147a4cb2c00000000000ae988 XMM05=19e9129bd510f2350000000000130c98 XMM06=1c1e69da92a60bd8000000000012fb00 XMM07=e042d86d42eb936e0000000000121158 XMM08=35c74efcf8b46cfc000000000011c5e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000