syzkaller login: [ 38.842088] BUG: Bad rss-counter state mm:0000000062614706 type:MM_FILEPAGES val:33 [ 38.843278] BUG: Bad rss-counter state mm:0000000062614706 type:MM_ANONPAGES val:22 [ 38.882275] ================================================================== [ 38.883246] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.884331] Read of size 8 at addr ffff88800e89b3f8 by task sshd/219 [ 38.885156] [ 38.885540] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.886444] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.887360] Call Trace: [ 38.887738] [ 38.888032] dump_stack_lvl+0x91/0xf0 [ 38.888534] print_report+0xcc/0x620 [ 38.889014] ? __virt_addr_valid+0x102/0x340 [ 38.889639] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.890313] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.891005] kasan_report+0xbe/0xf0 [ 38.891541] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.892129] vma_interval_tree_remove+0xc75/0xec0 [ 38.892826] vma_prepare+0xc54/0x11a0 [ 38.893442] __split_vma+0x5af/0x950 [ 38.893923] ? __pfx___split_vma+0x10/0x10 [ 38.894448] ? find_held_lock+0x2c/0x110 [ 38.894954] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.895568] ? lock_is_held_type+0x9f/0x120 [ 38.896176] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.896870] ? mtree_range_walk+0x632/0x900 [ 38.897571] ? mas_walk+0x5c7/0x7c0 [ 38.898107] do_vmi_munmap+0x1f1/0x2b0 [ 38.898617] mmap_region+0x1f9/0x2660 [ 38.899165] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.899797] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.900729] ? __pfx_lock_acquire+0x10/0x10 [ 38.901275] ? __pfx_mmap_region+0x10/0x10 [ 38.901797] ? security_mmap_addr+0x7d/0xa0 [ 38.902319] ? get_unmapped_area+0x1f5/0x3f0 [ 38.902863] do_mmap+0x854/0xf00 [ 38.903298] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.903795] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.904376] ksys_mmap_pgoff+0x3af/0x500 [ 38.904887] do_syscall_64+0x3f/0x90 [ 38.905373] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.906013] RIP: 0033:0x7fc699a1bd82 [ 38.906460] 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 [ 38.908607] RSP: 002b:00007ffdac014238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.909517] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc699a1bd82 [ 38.910371] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc698e55000 [ 38.911231] RBP: 00007fc698e55000 R08: 0000000000000009 R09: 0000000000001000 [ 38.912079] R10: 0000000000000812 R11: 0000000000000206 R12: 00005641af2b3f70 [ 38.912945] R13: 00007ffdac014250 R14: 00007ffdac014280 R15: 00007ffdac0145e0 [ 38.913798] [ 38.914087] [ 38.914293] Allocated by task 212: [ 38.914721] kasan_save_stack+0x22/0x50 [ 38.915226] kasan_set_track+0x25/0x30 [ 38.915708] __kasan_slab_alloc+0x59/0x70 [ 38.916239] kmem_cache_alloc+0x16b/0x370 [ 38.916769] vm_area_dup+0x20/0x160 [ 38.917230] __split_vma+0x170/0x950 [ 38.917701] split_vma+0xc6/0x110 [ 38.918137] mprotect_fixup+0x8d2/0xb30 [ 38.918633] do_mprotect_pkey+0x87e/0xd40 [ 38.919163] __x64_sys_mprotect+0x78/0xc0 [ 38.919683] do_syscall_64+0x3f/0x90 [ 38.920160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.920813] [ 38.921029] Freed by task 212: [ 38.921424] kasan_save_stack+0x22/0x50 [ 38.921924] kasan_set_track+0x25/0x30 [ 38.922417] kasan_save_free_info+0x2b/0x50 [ 38.922948] __kasan_slab_free+0x10a/0x190 [ 38.923485] kmem_cache_free+0x10d/0x4d0 [ 38.923992] rcu_core+0x8c8/0x2860 [ 38.924445] __do_softirq+0x1b7/0x7d4 [ 38.924925] [ 38.925144] Last potentially related work creation: [ 38.925724] kasan_save_stack+0x22/0x50 [ 38.926292] __kasan_record_aux_stack+0x8e/0xa0 [ 38.926868] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.927506] remove_vma+0x139/0x170 [ 38.927953] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.928526] do_vmi_munmap+0x1f1/0x2b0 [ 38.929019] __vm_munmap+0x138/0x3a0 [ 38.929480] __x64_sys_munmap+0x59/0x80 [ 38.929967] do_syscall_64+0x3f/0x90 [ 38.930443] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.931073] [ 38.931289] Second to last potentially related work creation: [ 38.931981] kasan_save_stack+0x22/0x50 [ 38.932488] __kasan_record_aux_stack+0x8e/0xa0 [ 38.933073] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.933720] remove_vma+0x139/0x170 [ 38.934176] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.934732] do_vmi_munmap+0x1f1/0x2b0 [ 38.935218] mmap_region+0x1f9/0x2660 [ 38.935687] do_mmap+0x854/0xf00 [ 38.936117] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.936611] ksys_mmap_pgoff+0x7d/0x500 [ 38.937108] do_syscall_64+0x3f/0x90 [ 38.937578] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.938224] [ 38.938439] The buggy address belongs to the object at ffff88800e89b3a0 [ 38.938439] which belongs to the cache vm_area_struct of size 168 [ 38.939920] The buggy address is located 88 bytes inside of [ 38.939920] freed 168-byte region [ffff88800e89b3a0, ffff88800e89b448) [ 38.941340] [ 38.941559] The buggy address belongs to the physical page: [ 38.942221] page:000000001f05405b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe89b [ 38.943317] memcg:ffff88800df70201 [ 38.943744] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.944405] page_type: 0xffffffff() [ 38.944849] raw: 0100000000000200 ffff8880087a0c80 ffffea0000326900 dead000000000002 [ 38.945759] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df70201 [ 38.946668] page dumped because: kasan: bad access detected [ 38.947333] [ 38.947546] Memory state around the buggy address: [ 38.948132] ffff88800e89b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.948996] ffff88800e89b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.949843] >ffff88800e89b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.950686] ^ [ 38.951524] ffff88800e89b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.952384] ffff88800e89b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.953233] ================================================================== [ 38.954218] Disabling lock debugging due to kernel taint [ 41.456768] BUG: Bad rss-counter state mm:00000000c65f3294 type:MM_FILEPAGES val:33 [ 41.457495] BUG: Bad rss-counter state mm:00000000c65f3294 type:MM_ANONPAGES val:22 [ 41.985789] BUG: Bad rss-counter state mm:00000000d5f1bbb3 type:MM_FILEPAGES val:33 [ 41.986793] BUG: Bad rss-counter state mm:00000000d5f1bbb3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29749' (ECDSA) to the list of known hosts. 2023/06/20 15:58:28 fuzzer started 2023/06/20 15:58:28 dialing manager at localhost:36067 2023/06/20 15:58:28 checking machine... 2023/06/20 15:58:28 checking revisions... [ 42.753410] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:58:28 testing simple program... [ 42.802922] cgroup: Unknown subsys name 'net' [ 42.842989] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:58:28 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=000000000000000c RCX=ffffffff8140686b RDX=ffff888015950000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffffffff848996c0 RSP=ffff88801a217d70 R8 =0000000000000005 R9 =000000000000000c R10=0000000000000001 R11=0000000000000000 R12=0000000000000001 R13=0000000000000005 R14=000000000000000d R15=0000000000000000 RIP=ffffffff814c0261 RFL=00000246 [---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 00007fd6f0968700 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=00007f47da882650 CR3=000000000fe06000 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=2037323a38353a3531203032206e754a XMM01=5f687373203a726f727265203a5d3633 XMM02=632079746972756365732078756e694c XMM03=742064656c696146203a656d616e7962 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a38353a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88806cf09ae0 RSI=ffff88801a367898 RDI=ffff88806cf09ae8 RBP=dffffc0000000000 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000607e R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88801a367898 R15=ffff88806cf09a98 RIP=ffffffff81131c58 RFL=00000246 [---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 00007f5b065cf900 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=00007f5b06b87100 CR3=0000000015868000 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=6f732f6463736e2f6e75722f7261762f XMM01=0000000000ff0000000000ff00000000 XMM02=ffffffffffffff00ffffffffffffffff XMM03=0000000000000000000000005e356692 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffffff00ffffff00ffffff00 XMM08=00000000000000810000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000