syzkaller login: [ 31.293981] BUG: Bad rss-counter state mm:00000000f7749c3c type:MM_FILEPAGES val:33 [ 31.295161] BUG: Bad rss-counter state mm:00000000f7749c3c type:MM_ANONPAGES val:22 [ 31.332689] ================================================================== [ 31.333826] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.335000] Read of size 8 at addr ffff88800fabea50 by task sshd/220 [ 31.335939] [ 31.336203] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.337317] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.338525] Call Trace: [ 31.338905] [ 31.339265] dump_stack_lvl+0x91/0xf0 [ 31.339831] print_report+0xcc/0x620 [ 31.340415] ? __virt_addr_valid+0x102/0x340 [ 31.341102] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.341866] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.342583] kasan_report+0xbe/0xf0 [ 31.343165] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.343917] vma_interval_tree_remove+0xc75/0xec0 [ 31.344650] vma_prepare+0xc54/0x11a0 [ 31.345157] __split_vma+0x5af/0x950 [ 31.345786] ? __pfx___split_vma+0x10/0x10 [ 31.346392] ? find_held_lock+0x2c/0x110 [ 31.346961] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.347581] ? lock_is_held_type+0x9f/0x120 [ 31.348152] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.348819] ? mtree_range_walk+0x632/0x900 [ 31.349412] ? mas_walk+0x5c7/0x7c0 [ 31.349919] do_vmi_munmap+0x1f1/0x2b0 [ 31.350444] mmap_region+0x1f9/0x2660 [ 31.350952] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.351496] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.352251] ? __pfx_lock_acquire+0x10/0x10 [ 31.352839] ? __pfx_mmap_region+0x10/0x10 [ 31.353410] ? security_mmap_addr+0x7d/0xa0 [ 31.353970] ? get_unmapped_area+0x1f5/0x3f0 [ 31.354552] do_mmap+0x854/0xf00 [ 31.355017] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.355542] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.356142] ksys_mmap_pgoff+0x3af/0x500 [ 31.356695] do_syscall_64+0x3f/0x90 [ 31.357205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.357903] RIP: 0033:0x7f01281b1d82 [ 31.358393] 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 [ 31.360658] RSP: 002b:00007fff8a47ab88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.361625] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f01281b1d82 [ 31.362526] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f01275eb000 [ 31.363420] RBP: 00007f01275eb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.364326] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558ed04ccec0 [ 31.365239] R13: 00007fff8a47aba0 R14: 00007fff8a47abd0 R15: 00007fff8a47af30 [ 31.366149] [ 31.366460] [ 31.366691] Allocated by task 213: [ 31.367152] kasan_save_stack+0x22/0x50 [ 31.367700] kasan_set_track+0x25/0x30 [ 31.368336] __kasan_slab_alloc+0x59/0x70 [ 31.368922] kmem_cache_alloc+0x16b/0x370 [ 31.369483] vm_area_dup+0x20/0x160 [ 31.369966] __split_vma+0x170/0x950 [ 31.370460] split_vma+0xc6/0x110 [ 31.370929] mprotect_fixup+0x8d2/0xb30 [ 31.371475] do_mprotect_pkey+0x87e/0xd40 [ 31.372025] __x64_sys_mprotect+0x78/0xc0 [ 31.372591] do_syscall_64+0x3f/0x90 [ 31.373094] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.373780] [ 31.374011] Freed by task 213: [ 31.374436] kasan_save_stack+0x22/0x50 [ 31.374975] kasan_set_track+0x25/0x30 [ 31.375504] kasan_save_free_info+0x2b/0x50 [ 31.376067] __kasan_slab_free+0x10a/0x190 [ 31.376644] kmem_cache_free+0x10d/0x4d0 [ 31.377203] rcu_core+0x8c8/0x2860 [ 31.377673] __do_softirq+0x1b7/0x7d4 [ 31.378190] [ 31.378422] Last potentially related work creation: [ 31.379048] kasan_save_stack+0x22/0x50 [ 31.379579] __kasan_record_aux_stack+0x8e/0xa0 [ 31.380185] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.380885] remove_vma+0x139/0x170 [ 31.381362] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.381950] do_vmi_munmap+0x1f1/0x2b0 [ 31.382466] __vm_munmap+0x138/0x3a0 [ 31.382959] __x64_sys_munmap+0x59/0x80 [ 31.383491] do_syscall_64+0x3f/0x90 [ 31.383996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.384694] [ 31.384922] The buggy address belongs to the object at ffff88800fabe9f8 [ 31.384922] which belongs to the cache vm_area_struct of size 168 [ 31.386489] The buggy address is located 88 bytes inside of [ 31.386489] freed 168-byte region [ffff88800fabe9f8, ffff88800fabeaa0) [ 31.387980] [ 31.388207] The buggy address belongs to the physical page: [ 31.388924] page:00000000be6f52eb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfabe [ 31.390066] memcg:ffff88800d3fcc01 [ 31.390525] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.391207] page_type: 0xffffffff() [ 31.391693] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.392683] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3fcc01 [ 31.393660] page dumped because: kasan: bad access detected [ 31.394631] [ 31.394910] Memory state around the buggy address: [ 31.395532] ffff88800fabe900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.396439] ffff88800fabe980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.397364] >ffff88800fabea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.398267] ^ [ 31.399019] ffff88800fabea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.399934] ffff88800fabeb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.400858] ================================================================== [ 31.401976] Disabling lock debugging due to kernel taint [ 33.467590] BUG: Bad rss-counter state mm:00000000ea4b41b1 type:MM_FILEPAGES val:33 [ 33.468872] BUG: Bad rss-counter state mm:00000000ea4b41b1 type:MM_ANONPAGES val:22 [ 33.881541] BUG: Bad rss-counter state mm:0000000024440fcb type:MM_FILEPAGES val:33 [ 33.882563] BUG: Bad rss-counter state mm:0000000024440fcb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6698' (ECDSA) to the list of known hosts. 2023/06/21 00:39:55 fuzzer started 2023/06/21 00:39:56 dialing manager at localhost:36067 2023/06/21 00:39:56 checking machine... 2023/06/21 00:39:56 checking revisions... [ 34.542807] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:39:56 testing simple program... [ 34.593576] cgroup: Unknown subsys name 'net' [ 34.638069] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:39:55 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016d5f220 RCX=0000000000000001 RDX=1ffff11002dabe45 RSI=ffffffff8180a924 RDI=ffff888016d5f228 RBP=0000000000000000 RSP=ffff888016d5f138 R8 =0000000000000001 R9 =ffff888016d5f198 R10=0000000000038001 R11=0000000000021eef R12=ffff888016d5f220 R13=0000000000000000 R14=ffff88800f5ab680 R15=ffff8880098a44c0 RIP=ffffffff813ad4cf RFL=00000287 [--S--PC] 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 00007fb0eaae5900 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=00007fb0eaac4020 CR3=000000001a3fc000 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=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 info registers vcpu 1 RAX=ffffea00003b4bc0 RBX=ffff88800ed2f7a0 RCX=0000000000000100 RDX=0000000000000000 RSI=ffffffff811431c2 RDI=0000777f80000000 RBP=0000000000000000 RSP=ffff88806cf09d88 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000000 R12=ffffffff81845e00 R13=ffffea0000391200 R14=ffffffff8117fdd9 R15=ffff88800d52c200 RIP=ffffffff8180c635 RFL=00000202 [-------] 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=00007f681dce0000 CR3=000000000f666000 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=2035353a39333a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a39333a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000