syzkaller login: [ 30.726276] BUG: Bad rss-counter state mm:000000007b9ee90c type:MM_FILEPAGES val:33 [ 30.727370] BUG: Bad rss-counter state mm:000000007b9ee90c type:MM_ANONPAGES val:22 [ 30.894835] ================================================================== [ 30.896315] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.897663] Read of size 8 at addr ffff88801806cc20 by task sshd/220 [ 30.898773] [ 30.899028] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.900107] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.901312] Call Trace: [ 30.901711] [ 30.902060] dump_stack_lvl+0x91/0xf0 [ 30.902676] print_report+0xcc/0x620 [ 30.903277] ? __virt_addr_valid+0x102/0x340 [ 30.903969] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.904745] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.905514] kasan_report+0xbe/0xf0 [ 30.906095] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.906869] vma_interval_tree_remove+0xc75/0xec0 [ 30.907649] vma_prepare+0xc54/0x11a0 [ 30.908241] __split_vma+0x5af/0x950 [ 30.908728] ? __pfx___split_vma+0x10/0x10 [ 30.909240] ? find_held_lock+0x2c/0x110 [ 30.909757] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.910321] ? lock_is_held_type+0x9f/0x120 [ 30.910847] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.911447] ? mtree_range_walk+0x632/0x900 [ 30.911994] ? mas_walk+0x5c7/0x7c0 [ 30.912467] do_vmi_munmap+0x1f1/0x2b0 [ 30.912949] mmap_region+0x1f9/0x2660 [ 30.913414] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.913927] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.914639] ? __pfx_lock_acquire+0x10/0x10 [ 30.915158] ? __pfx_mmap_region+0x10/0x10 [ 30.915698] ? security_mmap_addr+0x7d/0xa0 [ 30.916218] ? get_unmapped_area+0x1f5/0x3f0 [ 30.916753] do_mmap+0x854/0xf00 [ 30.917181] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.917656] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.918210] ksys_mmap_pgoff+0x3af/0x500 [ 30.918712] do_syscall_64+0x3f/0x90 [ 30.919182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.919848] RIP: 0033:0x7f713285ed82 [ 30.920294] 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 [ 30.922387] RSP: 002b:00007ffe49bddbb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.923277] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f713285ed82 [ 30.924126] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7131c98000 [ 30.924967] RBP: 00007f7131c98000 R08: 0000000000000009 R09: 0000000000001000 [ 30.925806] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f076ea7ec0 [ 30.926643] R13: 00007ffe49bddbd0 R14: 00007ffe49bddc00 R15: 00007ffe49bddf60 [ 30.927506] [ 30.927790] [ 30.928001] Allocated by task 213: [ 30.928422] kasan_save_stack+0x22/0x50 [ 30.928927] kasan_set_track+0x25/0x30 [ 30.929411] __kasan_slab_alloc+0x59/0x70 [ 30.929934] kmem_cache_alloc+0x16b/0x370 [ 30.930439] vm_area_dup+0x20/0x160 [ 30.930894] __split_vma+0x170/0x950 [ 30.931362] split_vma+0xc6/0x110 [ 30.931797] mprotect_fixup+0x8d2/0xb30 [ 30.932293] do_mprotect_pkey+0x87e/0xd40 [ 30.932807] __x64_sys_mprotect+0x78/0xc0 [ 30.933318] do_syscall_64+0x3f/0x90 [ 30.933806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.934439] [ 30.934652] Freed by task 210: [ 30.935036] kasan_save_stack+0x22/0x50 [ 30.935542] kasan_set_track+0x25/0x30 [ 30.936077] kasan_save_free_info+0x2b/0x50 [ 30.936624] __kasan_slab_free+0x10a/0x190 [ 30.937148] kmem_cache_free+0x10d/0x4d0 [ 30.937652] rcu_core+0x8c8/0x2860 [ 30.938088] __do_softirq+0x1b7/0x7d4 [ 30.938550] [ 30.938766] Last potentially related work creation: [ 30.939348] kasan_save_stack+0x22/0x50 [ 30.939845] __kasan_record_aux_stack+0x8e/0xa0 [ 30.940410] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.941053] remove_vma+0x139/0x170 [ 30.941502] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.942046] do_vmi_munmap+0x1f1/0x2b0 [ 30.942528] __vm_munmap+0x138/0x3a0 [ 30.942988] __x64_sys_munmap+0x59/0x80 [ 30.943484] do_syscall_64+0x3f/0x90 [ 30.943958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.944575] [ 30.944792] The buggy address belongs to the object at ffff88801806cbc8 [ 30.944792] which belongs to the cache vm_area_struct of size 168 [ 30.946251] The buggy address is located 88 bytes inside of [ 30.946251] freed 168-byte region [ffff88801806cbc8, ffff88801806cc70) [ 30.947650] [ 30.947863] The buggy address belongs to the physical page: [ 30.948508] page:00000000d0f5622d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1806c [ 30.949568] memcg:ffff888019d68601 [ 30.949993] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.950623] page_type: 0xffffffff() [ 30.951062] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.951972] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d68601 [ 30.952854] page dumped because: kasan: bad access detected [ 30.953503] [ 30.953721] Memory state around the buggy address: [ 30.954300] ffff88801806cb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.955143] ffff88801806cb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.956012] >ffff88801806cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.956845] ^ [ 30.957360] ffff88801806cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.958213] ffff88801806cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.959048] ================================================================== [ 30.960054] Disabling lock debugging due to kernel taint [ 32.963850] BUG: Bad rss-counter state mm:00000000bf5e08ab type:MM_FILEPAGES val:33 [ 32.964856] BUG: Bad rss-counter state mm:00000000bf5e08ab type:MM_ANONPAGES val:22 [ 33.498991] BUG: Bad rss-counter state mm:000000008f06df17 type:MM_FILEPAGES val:33 [ 33.500189] BUG: Bad rss-counter state mm:000000008f06df17 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49456' (ECDSA) to the list of known hosts. 2023/06/21 01:29:43 fuzzer started 2023/06/21 01:29:44 dialing manager at localhost:36067 2023/06/21 01:29:44 checking machine... 2023/06/21 01:29:44 checking revisions... [ 34.161850] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:29:44 testing simple program... [ 34.224532] cgroup: Unknown subsys name 'net' [ 34.299165] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:29:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11003327fac RCX=0000000000000000 RDX=ffff888010341b40 RSI=ffffffff8170f5dc RDI=ffff88800f11ac60 RBP=800000001793a065 RSP=ffff88801993fd38 R8 =0000000000000000 R9 =ffffed1001e2358c R10=ffff88800f11ac63 R11=0000000000000000 R12=ffff888018195df0 R13=0000000000000a55 R14=0000000000000000 R15=000000000e24a067 RIP=ffffffff814c0864 RFL=00000282 [--S----] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f80e5c6a900 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=00007f80e67be044 CR3=000000000ca86000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=62f1ef9dfd2f1666776a614f6c815d67 XMM04=42b1a12cecc98724fa6bd6d5dd96f727 XMM05=00000000000000000000000000000000 XMM06=42b1a12cec2f1624776a614f6c815d27 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fb3c0ed9c78 CR3=000000000d286000 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=c2a8bd6a5596c4976945d68ca2c05aa5 XMM02=000000000011d0d0ec2efd57dc4c00df XMM03=00000000001218700fa000b5bf84df18 XMM04=9d496d027289995a00000000000ae988 XMM05=19e9129bd510f2350000000000131738 XMM06=4fda316b135da52b00000000001315c0 XMM07=e042d86d42eb936e0000000000121af0 XMM08=0fa000b5bf84df18000000000011d130 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000