syzkaller login: [ 34.745438] BUG: Bad rss-counter state mm:00000000bae49795 type:MM_FILEPAGES val:33 [ 34.746858] BUG: Bad rss-counter state mm:00000000bae49795 type:MM_ANONPAGES val:22 [ 34.907002] ================================================================== [ 34.907984] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.908988] Read of size 8 at addr ffff888019845d08 by task sshd/220 [ 34.909926] [ 34.910158] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.911071] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.912264] Call Trace: [ 34.912652] [ 34.913005] dump_stack_lvl+0x91/0xf0 [ 34.913590] print_report+0xcc/0x620 [ 34.914169] ? __virt_addr_valid+0x102/0x340 [ 34.914829] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.915573] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.916304] kasan_report+0xbe/0xf0 [ 34.916881] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.917619] vma_interval_tree_remove+0xc75/0xec0 [ 34.918342] vma_prepare+0xc54/0x11a0 [ 34.918923] __split_vma+0x5af/0x950 [ 34.919484] ? __pfx___split_vma+0x10/0x10 [ 34.920118] ? find_held_lock+0x2c/0x110 [ 34.920759] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.921422] ? lock_is_held_type+0x9f/0x120 [ 34.921999] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.922644] ? mtree_range_walk+0x632/0x900 [ 34.923232] ? mas_walk+0x5c7/0x7c0 [ 34.923734] do_vmi_munmap+0x1f1/0x2b0 [ 34.924256] mmap_region+0x1f9/0x2660 [ 34.924780] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.925326] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.926091] ? __pfx_lock_acquire+0x10/0x10 [ 34.926654] ? __pfx_mmap_region+0x10/0x10 [ 34.927215] ? security_mmap_addr+0x7d/0xa0 [ 34.927783] ? get_unmapped_area+0x1f5/0x3f0 [ 34.928368] do_mmap+0x854/0xf00 [ 34.928849] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.929377] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.929973] ksys_mmap_pgoff+0x3af/0x500 [ 34.930519] do_syscall_64+0x3f/0x90 [ 34.931027] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.931710] RIP: 0033:0x7f1c11bf8d82 [ 34.932196] 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 [ 34.934480] RSP: 002b:00007ffd4623de38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.935441] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1c11bf8d82 [ 34.936343] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1c11032000 [ 34.937250] RBP: 00007f1c11032000 R08: 0000000000000009 R09: 0000000000001000 [ 34.938162] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dc92571f60 [ 34.939068] R13: 00007ffd4623de50 R14: 00007ffd4623de80 R15: 00007ffd4623e1e0 [ 34.939983] [ 34.940298] [ 34.940533] Allocated by task 213: [ 34.940997] kasan_save_stack+0x22/0x50 [ 34.941535] kasan_set_track+0x25/0x30 [ 34.942060] __kasan_slab_alloc+0x59/0x70 [ 34.942619] kmem_cache_alloc+0x16b/0x370 [ 34.943172] vm_area_dup+0x20/0x160 [ 34.943654] __split_vma+0x170/0x950 [ 34.944149] split_vma+0xc6/0x110 [ 34.944622] mprotect_fixup+0x8d2/0xb30 [ 34.945166] do_mprotect_pkey+0x87e/0xd40 [ 34.945740] __x64_sys_mprotect+0x78/0xc0 [ 34.946296] do_syscall_64+0x3f/0x90 [ 34.946815] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.947521] [ 34.947760] Freed by task 213: [ 34.948195] kasan_save_stack+0x22/0x50 [ 34.948753] kasan_set_track+0x25/0x30 [ 34.949301] kasan_save_free_info+0x2b/0x50 [ 34.949879] __kasan_slab_free+0x10a/0x190 [ 34.950459] kmem_cache_free+0x10d/0x4d0 [ 34.951018] rcu_core+0x8c8/0x2860 [ 34.951516] __do_softirq+0x1b7/0x7d4 [ 34.952041] [ 34.952272] Last potentially related work creation: [ 34.952940] kasan_save_stack+0x22/0x50 [ 34.953499] __kasan_record_aux_stack+0x8e/0xa0 [ 34.954139] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.954851] remove_vma+0x139/0x170 [ 34.955355] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.955973] do_vmi_munmap+0x1f1/0x2b0 [ 34.956513] __vm_munmap+0x138/0x3a0 [ 34.957036] __x64_sys_munmap+0x59/0x80 [ 34.957589] do_syscall_64+0x3f/0x90 [ 34.958116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.958830] [ 34.959071] The buggy address belongs to the object at ffff888019845cb0 [ 34.959071] which belongs to the cache vm_area_struct of size 168 [ 34.960706] The buggy address is located 88 bytes inside of [ 34.960706] freed 168-byte region [ffff888019845cb0, ffff888019845d58) [ 34.962291] [ 34.962526] The buggy address belongs to the physical page: [ 34.963259] page:00000000b8287ed0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19845 [ 34.964466] memcg:ffff88800d40f001 [ 34.964949] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.965665] page_type: 0xffffffff() [ 34.966166] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.967188] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d40f001 [ 34.968193] page dumped because: kasan: bad access detected [ 34.968936] [ 34.969175] Memory state around the buggy address: [ 34.969819] ffff888019845c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 34.970776] ffff888019845c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.971731] >ffff888019845d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.972683] ^ [ 34.973191] ffff888019845d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.974139] ffff888019845e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.975081] ================================================================== [ 34.976174] Disabling lock debugging due to kernel taint [ 37.679219] BUG: Bad rss-counter state mm:00000000789d859a type:MM_FILEPAGES val:33 [ 37.680250] BUG: Bad rss-counter state mm:00000000789d859a type:MM_ANONPAGES val:22 [ 38.117995] BUG: Bad rss-counter state mm:000000000de6eb4d type:MM_FILEPAGES val:33 [ 38.118987] BUG: Bad rss-counter state mm:000000000de6eb4d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35311' (ECDSA) to the list of known hosts. 2023/06/20 00:57:26 fuzzer started 2023/06/20 00:57:26 dialing manager at localhost:44161 2023/06/20 00:57:26 checking machine... 2023/06/20 00:57:26 checking revisions... [ 38.838732] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:57:26 testing simple program... [ 38.892519] cgroup: Unknown subsys name 'net' [ 38.937777] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:57:21 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81847451 RDX=0000000000008474 RSI=0000000000008474 RDI=ffffffff86508d90 RBP=ffff8880195df4e8 RSP=ffff8880195df420 R8 =0000000000000000 R9 =ffff8880195df4d0 R10=0000000000038001 R11=0000000000021e78 R12=ffff8880195df4f0 R13=ffff8880195df4d8 R14=ffff8880195df4d1 R15=ffff8880195df490 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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 00007f313bdca900 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=00007fff12b1c000 CR3=0000000019496000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000001 RDX=ffff888008e27d01 RSI=ffff888008e27db0 RDI=ffff888008e27db0 RBP=ffff88806cf09af0 RSP=ffff88806cf09a20 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b523e R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff888008e27db0 R15=ffff88806cf09a98 RIP=ffffffff8112fbf3 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=00007f95c2b13530 CR3=0000000008dae000 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=f670837a050d099587470db3a1be2c09 XMM02=ec2efd57dc4c00df000000000011e680 XMM03=fbb5cc164dd657d8000000000011e750 XMM04=4de75f7a481f379000000000000ae988 XMM05=19e9129bd510f2350000000000134ed8 XMM06=89dcbfa96f5492b10000000000133d40 XMM07=e042d86d42eb936e0000000000125678 XMM08=fbb5cc164dd657d8000000000011e750 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000