syzkaller login: [ 31.573000] BUG: Bad rss-counter state mm:00000000b5e59131 type:MM_FILEPAGES val:33 [ 31.574513] BUG: Bad rss-counter state mm:00000000b5e59131 type:MM_ANONPAGES val:22 [ 31.741253] ================================================================== [ 31.742203] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.743149] Read of size 8 at addr ffff88800ea34228 by task sshd/222 [ 31.743921] [ 31.744339] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.745211] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.746203] Call Trace: [ 31.746520] [ 31.746805] dump_stack_lvl+0x91/0xf0 [ 31.747304] print_report+0xcc/0x620 [ 31.747789] ? __virt_addr_valid+0x102/0x340 [ 31.748338] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.748957] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.749568] kasan_report+0xbe/0xf0 [ 31.750042] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.750673] vma_interval_tree_remove+0xc75/0xec0 [ 31.751267] vma_prepare+0xc54/0x11a0 [ 31.751744] __split_vma+0x5af/0x950 [ 31.752216] ? __pfx___split_vma+0x10/0x10 [ 31.752740] ? find_held_lock+0x2c/0x110 [ 31.753260] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.753819] ? lock_is_held_type+0x9f/0x120 [ 31.754370] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.754978] ? mtree_range_walk+0x632/0x900 [ 31.755525] ? mas_walk+0x5c7/0x7c0 [ 31.756011] do_vmi_munmap+0x1f1/0x2b0 [ 31.756518] mmap_region+0x1f9/0x2660 [ 31.757010] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.757529] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.758270] ? __pfx_lock_acquire+0x10/0x10 [ 31.758803] ? __pfx_mmap_region+0x10/0x10 [ 31.759338] ? security_mmap_addr+0x7d/0xa0 [ 31.759861] ? get_unmapped_area+0x1f5/0x3f0 [ 31.760416] do_mmap+0x854/0xf00 [ 31.760864] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.761363] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.761919] ksys_mmap_pgoff+0x3af/0x500 [ 31.762445] do_syscall_64+0x3f/0x90 [ 31.762922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.763575] RIP: 0033:0x7fdfc788ad82 [ 31.764035] 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 [ 31.766176] RSP: 002b:00007ffc6fd62bd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.767082] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdfc788ad82 [ 31.767924] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdfc6cc4000 [ 31.768759] RBP: 00007fdfc6cc4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.769599] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558b703ded90 [ 31.770463] R13: 00007ffc6fd62bf0 R14: 00007ffc6fd62c20 R15: 00007ffc6fd62f80 [ 31.771323] [ 31.771615] [ 31.771826] Allocated by task 215: [ 31.772254] kasan_save_stack+0x22/0x50 [ 31.772751] kasan_set_track+0x25/0x30 [ 31.773247] __kasan_slab_alloc+0x59/0x70 [ 31.773764] kmem_cache_alloc+0x16b/0x370 [ 31.774291] vm_area_dup+0x20/0x160 [ 31.774744] __split_vma+0x170/0x950 [ 31.775211] split_vma+0xc6/0x110 [ 31.775655] mprotect_fixup+0x8d2/0xb30 [ 31.776157] do_mprotect_pkey+0x87e/0xd40 [ 31.776684] __x64_sys_mprotect+0x78/0xc0 [ 31.777208] do_syscall_64+0x3f/0x90 [ 31.777686] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.778342] [ 31.778563] Freed by task 204: [ 31.778953] kasan_save_stack+0x22/0x50 [ 31.779457] kasan_set_track+0x25/0x30 [ 31.779954] kasan_save_free_info+0x2b/0x50 [ 31.780480] __kasan_slab_free+0x10a/0x190 [ 31.781010] kmem_cache_free+0x10d/0x4d0 [ 31.781522] rcu_core+0x8c8/0x2860 [ 31.781969] __do_softirq+0x1b7/0x7d4 [ 31.782460] [ 31.782675] Last potentially related work creation: [ 31.783259] kasan_save_stack+0x22/0x50 [ 31.783764] __kasan_record_aux_stack+0x8e/0xa0 [ 31.784336] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.784979] remove_vma+0x139/0x170 [ 31.785429] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.786082] do_vmi_munmap+0x1f1/0x2b0 [ 31.786587] __vm_munmap+0x138/0x3a0 [ 31.787058] __x64_sys_munmap+0x59/0x80 [ 31.787557] do_syscall_64+0x3f/0x90 [ 31.788030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.788690] [ 31.788910] The buggy address belongs to the object at ffff88800ea341d0 [ 31.788910] which belongs to the cache vm_area_struct of size 168 [ 31.790394] The buggy address is located 88 bytes inside of [ 31.790394] freed 168-byte region [ffff88800ea341d0, ffff88800ea34278) [ 31.791790] [ 31.792006] The buggy address belongs to the physical page: [ 31.792659] page:000000001953ec8a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea34 [ 31.793739] memcg:ffff888015d70e01 [ 31.794172] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.794820] page_type: 0xffffffff() [ 31.795269] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.796194] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015d70e01 [ 31.797101] page dumped because: kasan: bad access detected [ 31.797758] [ 31.797972] Memory state around the buggy address: [ 31.798567] ffff88800ea34100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.799423] ffff88800ea34180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.800280] >ffff88800ea34200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.801125] ^ [ 31.801685] ffff88800ea34280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.802549] ffff88800ea34300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.803394] ================================================================== [ 31.804421] Disabling lock debugging due to kernel taint [ 34.521360] BUG: Bad rss-counter state mm:0000000029a24d85 type:MM_FILEPAGES val:33 [ 34.522517] BUG: Bad rss-counter state mm:0000000029a24d85 type:MM_ANONPAGES val:22 [ 34.922071] BUG: Bad rss-counter state mm:00000000074c0aff type:MM_FILEPAGES val:33 [ 34.923739] BUG: Bad rss-counter state mm:00000000074c0aff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18694' (ECDSA) to the list of known hosts. 2023/06/21 01:27:15 fuzzer started 2023/06/21 01:27:16 dialing manager at localhost:36067 2023/06/21 01:27:16 checking machine... 2023/06/21 01:27:16 checking revisions... [ 35.613938] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:27:16 testing simple program... [ 35.669791] cgroup: Unknown subsys name 'net' [ 35.703063] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:27:15 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffe2933ba08 CR3=000000000e508000 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=2035313a37323a3130203132206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a37323a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbfc32 RBX=ffffffff85dfe190 RCX=ffffffff8180ce88 RDX=0000000000000000 RSI=ffffffff86139066 RDI=ffffffff85dfe158 RBP=ffffffff85dfe180 RSP=ffff88800da678c0 R8 =ffffffff86139066 R9 =ffff88800da679b8 R10=0000000000038001 R11=0000000000020de5 R12=ffffffff85dfe1a4 R13=ffffffff85dfe158 R14=ffffffff85dfe17c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007fbb46c32900 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=00007fbb471ea0b0 CR3=000000000ed5e000 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=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