syzkaller login: [ 30.718594] BUG: Bad rss-counter state mm:000000008d6b37a5 type:MM_FILEPAGES val:33 [ 30.719621] BUG: Bad rss-counter state mm:000000008d6b37a5 type:MM_ANONPAGES val:22 [ 30.880485] ================================================================== [ 30.881568] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.882683] Read of size 8 at addr ffff88800f2276b0 by task sshd/221 [ 30.883648] [ 30.883864] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.884737] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.885722] Call Trace: [ 30.886043] [ 30.886325] dump_stack_lvl+0x91/0xf0 [ 30.886822] print_report+0xcc/0x620 [ 30.887316] ? __virt_addr_valid+0x102/0x340 [ 30.887868] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.888480] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.889091] kasan_report+0xbe/0xf0 [ 30.889559] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.890177] vma_interval_tree_remove+0xc75/0xec0 [ 30.890778] vma_prepare+0xc54/0x11a0 [ 30.891276] __split_vma+0x5af/0x950 [ 30.891748] ? __pfx___split_vma+0x10/0x10 [ 30.892273] ? find_held_lock+0x2c/0x110 [ 30.892796] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.893363] ? lock_is_held_type+0x9f/0x120 [ 30.893899] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.894502] ? mtree_range_walk+0x632/0x900 [ 30.895054] ? mas_walk+0x5c7/0x7c0 [ 30.895533] do_vmi_munmap+0x1f1/0x2b0 [ 30.896022] mmap_region+0x1f9/0x2660 [ 30.896501] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.897010] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.897723] ? __pfx_lock_acquire+0x10/0x10 [ 30.898248] ? __pfx_mmap_region+0x10/0x10 [ 30.898775] ? security_mmap_addr+0x7d/0xa0 [ 30.899308] ? get_unmapped_area+0x1f5/0x3f0 [ 30.899857] do_mmap+0x854/0xf00 [ 30.900292] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.900780] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.901337] ksys_mmap_pgoff+0x3af/0x500 [ 30.901844] do_syscall_64+0x3f/0x90 [ 30.902323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.902968] RIP: 0033:0x7f8fa1242d82 [ 30.903445] 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 [ 30.905555] RSP: 002b:00007ffd09e5b978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.906451] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8fa1242d82 [ 30.907303] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8fa067c000 [ 30.908150] RBP: 00007f8fa067c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.909008] R10: 0000000000000812 R11: 0000000000000206 R12: 00005571fdc02ec0 [ 30.909846] R13: 00007ffd09e5b990 R14: 00007ffd09e5b9c0 R15: 00007ffd09e5bd20 [ 30.910698] [ 30.910990] [ 30.911209] Allocated by task 214: [ 30.911655] kasan_save_stack+0x22/0x50 [ 30.912160] kasan_set_track+0x25/0x30 [ 30.912653] __kasan_slab_alloc+0x59/0x70 [ 30.913177] kmem_cache_alloc+0x16b/0x370 [ 30.913698] vm_area_dup+0x20/0x160 [ 30.914151] __split_vma+0x170/0x950 [ 30.914616] split_vma+0xc6/0x110 [ 30.915050] mprotect_fixup+0x8d2/0xb30 [ 30.915556] do_mprotect_pkey+0x87e/0xd40 [ 30.916077] __x64_sys_mprotect+0x78/0xc0 [ 30.916594] do_syscall_64+0x3f/0x90 [ 30.917070] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.917712] [ 30.917933] Freed by task 214: [ 30.918328] kasan_save_stack+0x22/0x50 [ 30.918830] kasan_set_track+0x25/0x30 [ 30.919336] kasan_save_free_info+0x2b/0x50 [ 30.919866] __kasan_slab_free+0x10a/0x190 [ 30.920396] kmem_cache_free+0x10d/0x4d0 [ 30.920907] rcu_core+0x8c8/0x2860 [ 30.921354] __do_softirq+0x1b7/0x7d4 [ 30.921830] [ 30.922046] Last potentially related work creation: [ 30.922624] kasan_save_stack+0x22/0x50 [ 30.923126] __kasan_record_aux_stack+0x8e/0xa0 [ 30.923720] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.924465] remove_vma+0x139/0x170 [ 30.924915] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.925470] do_vmi_munmap+0x1f1/0x2b0 [ 30.925952] __vm_munmap+0x138/0x3a0 [ 30.926427] __x64_sys_munmap+0x59/0x80 [ 30.926925] do_syscall_64+0x3f/0x90 [ 30.927407] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.928050] [ 30.928265] The buggy address belongs to the object at ffff88800f227658 [ 30.928265] which belongs to the cache vm_area_struct of size 168 [ 30.929733] The buggy address is located 88 bytes inside of [ 30.929733] freed 168-byte region [ffff88800f227658, ffff88800f227700) [ 30.931134] [ 30.931367] The buggy address belongs to the physical page: [ 30.932024] page:000000001f73cd33 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf227 [ 30.933110] memcg:ffff888016ff5e01 [ 30.933540] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.934190] page_type: 0xffffffff() [ 30.934640] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.935575] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ff5e01 [ 30.936481] page dumped because: kasan: bad access detected [ 30.937141] [ 30.937355] Memory state around the buggy address: [ 30.937933] ffff88800f227580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.938788] ffff88800f227600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.939652] >ffff88800f227680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.940530] ^ [ 30.941111] ffff88800f227700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.941970] ffff88800f227780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.942824] ================================================================== [ 30.943752] Disabling lock debugging due to kernel taint [ 33.197632] BUG: Bad rss-counter state mm:00000000824cf535 type:MM_FILEPAGES val:33 [ 33.198815] BUG: Bad rss-counter state mm:00000000824cf535 type:MM_ANONPAGES val:22 [ 33.607007] BUG: Bad rss-counter state mm:00000000d9a8154d type:MM_FILEPAGES val:33 [ 33.608077] BUG: Bad rss-counter state mm:00000000d9a8154d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24580' (ECDSA) to the list of known hosts. 2023/06/20 12:29:47 fuzzer started 2023/06/20 12:29:48 dialing manager at localhost:36067 2023/06/20 12:29:48 checking machine... 2023/06/20 12:29:48 checking revisions... [ 34.359556] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:29:48 testing simple program... [ 34.400754] cgroup: Unknown subsys name 'net' [ 34.462404] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:29:47 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000000 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88800ed7ff58 RSP=ffff88800ed7ff30 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88800ed7ff58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff84512047 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 00007fad3799a900 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=00007fad37f520b0 CR3=000000000cb5e000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453684b RDX=fffffbfff0adb095 RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff88806cf09c70 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=0000000000000000 R12=0000000000000003 R13=fffffbfff0adb094 R14=0000000000000001 R15=1ffff1100d9e138f RIP=ffffffff845368c8 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 =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=00007ff66706bb60 CR3=000000000c9f0000 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=5015da168b02ceaffb4db0df786bcd4b XMM02=000000000011c8d8eff9b2d0a8fce9cb XMM03=000000000011c9a82c67c8bc2e329bc3 XMM04=37a2c59a2301d23400000000000ae988 XMM05=e4cb8bb95a7664b60000000000131348 XMM06=c291bd5c70af25b900000000001311d0 XMM07=e042d86d42eb936e0000000000121798 XMM08=14dcc709c2da2f10000000000011c9a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000