syzkaller login: [ 30.714295] BUG: Bad rss-counter state mm:0000000031dee2b0 type:MM_FILEPAGES val:33 [ 30.715634] BUG: Bad rss-counter state mm:0000000031dee2b0 type:MM_ANONPAGES val:22 [ 30.885606] ================================================================== [ 30.886602] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.887742] Read of size 8 at addr ffff8880199be798 by task sshd/221 [ 30.888594] [ 30.888827] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.889759] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.890807] Call Trace: [ 30.891153] <TASK> [ 30.891464] dump_stack_lvl+0x91/0xf0 [ 30.892003] print_report+0xcc/0x620 [ 30.892534] ? __virt_addr_valid+0x102/0x340 [ 30.893126] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.893793] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.894458] kasan_report+0xbe/0xf0 [ 30.894981] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.895665] vma_interval_tree_remove+0xc75/0xec0 [ 30.896337] vma_prepare+0xc54/0x11a0 [ 30.896861] __split_vma+0x5af/0x950 [ 30.897379] ? __pfx___split_vma+0x10/0x10 [ 30.897963] ? find_held_lock+0x2c/0x110 [ 30.898540] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.899161] ? lock_is_held_type+0x9f/0x120 [ 30.899755] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.900448] ? mtree_range_walk+0x632/0x900 [ 30.901059] ? mas_walk+0x5c7/0x7c0 [ 30.901586] do_vmi_munmap+0x1f1/0x2b0 [ 30.902133] mmap_region+0x1f9/0x2660 [ 30.902670] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.903236] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.904038] ? __pfx_lock_acquire+0x10/0x10 [ 30.904627] ? __pfx_mmap_region+0x10/0x10 [ 30.905215] ? security_mmap_addr+0x7d/0xa0 [ 30.905799] ? get_unmapped_area+0x1f5/0x3f0 [ 30.906407] do_mmap+0x854/0xf00 [ 30.906890] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.907439] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.908077] ksys_mmap_pgoff+0x3af/0x500 [ 30.908638] do_syscall_64+0x3f/0x90 [ 30.909168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.909888] RIP: 0033:0x7f4817096d82 [ 30.910394] 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 [ 30.912759] RSP: 002b:00007fff76b9ed08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.913766] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4817096d82 [ 30.914706] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f48164d0000 [ 30.915646] RBP: 00007f48164d0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.916595] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558579e68ec0 [ 30.917533] R13: 00007fff76b9ed20 R14: 00007fff76b9ed50 R15: 00007fff76b9f0b0 [ 30.918481] </TASK> [ 30.918803] [ 30.919042] Allocated by task 214: [ 30.919520] kasan_save_stack+0x22/0x50 [ 30.920091] kasan_set_track+0x25/0x30 [ 30.920635] __kasan_slab_alloc+0x59/0x70 [ 30.921213] kmem_cache_alloc+0x16b/0x370 [ 30.921778] vm_area_dup+0x20/0x160 [ 30.922285] __split_vma+0x170/0x950 [ 30.922804] split_vma+0xc6/0x110 [ 30.923292] mprotect_fixup+0x8d2/0xb30 [ 30.923845] do_mprotect_pkey+0x87e/0xd40 [ 30.924429] __x64_sys_mprotect+0x78/0xc0 [ 30.925008] do_syscall_64+0x3f/0x90 [ 30.925535] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.926251] [ 30.926492] Freed by task 214: [ 30.926927] kasan_save_stack+0x22/0x50 [ 30.927492] kasan_set_track+0x25/0x30 [ 30.928051] kasan_save_free_info+0x2b/0x50 [ 30.928670] __kasan_slab_free+0x10a/0x190 [ 30.929254] kmem_cache_free+0x10d/0x4d0 [ 30.929814] rcu_core+0x8c8/0x2860 [ 30.930305] __do_softirq+0x1b7/0x7d4 [ 30.930834] [ 30.931071] Last potentially related work creation: [ 30.931714] kasan_save_stack+0x22/0x50 [ 30.932283] __kasan_record_aux_stack+0x8e/0xa0 [ 30.932917] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.933619] remove_vma+0x139/0x170 [ 30.934111] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.934725] do_vmi_munmap+0x1f1/0x2b0 [ 30.935264] __vm_munmap+0x138/0x3a0 [ 30.935784] __x64_sys_munmap+0x59/0x80 [ 30.936326] do_syscall_64+0x3f/0x90 [ 30.936834] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.937524] [ 30.937754] Second to last potentially related work creation: [ 30.938489] kasan_save_stack+0x22/0x50 [ 30.939025] __kasan_record_aux_stack+0x8e/0xa0 [ 30.939637] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.940337] remove_vma+0x139/0x170 [ 30.940822] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.941425] do_vmi_munmap+0x1f1/0x2b0 [ 30.941967] mmap_region+0x1f9/0x2660 [ 30.942507] do_mmap+0x854/0xf00 [ 30.942988] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.943530] ksys_mmap_pgoff+0x3af/0x500 [ 30.944095] do_syscall_64+0x3f/0x90 [ 30.944623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.945343] [ 30.945581] The buggy address belongs to the object at ffff8880199be740 [ 30.945581] which belongs to the cache vm_area_struct of size 168 [ 30.947221] The buggy address is located 88 bytes inside of [ 30.947221] freed 168-byte region [ffff8880199be740, ffff8880199be7e8) [ 30.948793] [ 30.949030] The buggy address belongs to the physical page: [ 30.949754] page:00000000d18a688a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x199be [ 30.950923] memcg:ffff88800eac0901 [ 30.951382] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.952094] page_type: 0xffffffff() [ 30.952581] raw: 0100000000000200 ffff8880087a0c80 ffffea0000409080 dead000000000002 [ 30.953566] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eac0901 [ 30.954535] page dumped because: kasan: bad access detected [ 30.955237] [ 30.955465] Memory state around the buggy address: [ 30.956102] ffff8880199be680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.957008] ffff8880199be700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.957926] >ffff8880199be780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.958843] ^ [ 30.959387] ffff8880199be800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.960350] ffff8880199be880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.961285] ================================================================== [ 30.962366] Disabling lock debugging due to kernel taint [ 32.964216] BUG: Bad rss-counter state mm:00000000e9735222 type:MM_FILEPAGES val:33 [ 32.965394] BUG: Bad rss-counter state mm:00000000e9735222 type:MM_ANONPAGES val:22 [ 33.423604] BUG: Bad rss-counter state mm:00000000a53c8c34 type:MM_FILEPAGES val:33 [ 33.425029] BUG: Bad rss-counter state mm:00000000a53c8c34 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47525' (ECDSA) to the list of known hosts. 2023/06/20 19:10:27 fuzzer started 2023/06/20 19:10:27 dialing manager at localhost:36067 2023/06/20 19:10:27 checking machine... 2023/06/20 19:10:27 checking revisions... [ 34.127171] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:10:28 testing simple program... [ 34.172657] cgroup: Unknown subsys name 'net' [ 34.224541] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:10:27 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff818a2a65 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a88 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000023571 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff8880142a1b40 R15=ffff888015846670 RIP=ffffffff813ad47f RFL=00000286 [--S--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 00007f33256e8900 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=00007f3324b19ed0 CR3=000000000996c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b08a0ee30c67b9d300000000000ae988 XMM05=4d5c05b7ae1067c70000000000135048 XMM06=e4cb8bb95a7664b60000000000133f00 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000003 RCX=0000000000000100 RDX=ffff888008e0d1c0 RSI=ffffffff8114320f RDI=0000000000000006 RBP=0000000019edb540 RSP=ffff888008e37c58 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000800 R11=0000000000000128 R12=0000000000000000 R13=0000000000000800 R14=ffffffff813782f8 R15=ffff88800d1a8f80 RIP=ffffffff814c0891 RFL=00000206 [-----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=00007f0b6b490020 CR3=000000000e8bc000 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=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