syzkaller login: [ 35.661899] BUG: Bad rss-counter state mm:0000000030d79d76 type:MM_FILEPAGES val:33 [ 35.662952] BUG: Bad rss-counter state mm:0000000030d79d76 type:MM_ANONPAGES val:22 [ 35.791877] ================================================================== [ 35.792986] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.794196] Read of size 8 at addr ffff88800e8e4798 by task sshd/220 [ 35.794982] [ 35.795148] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.795804] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.796557] Call Trace: [ 35.796815] <TASK> [ 35.797038] dump_stack_lvl+0x91/0xf0 [ 35.797414] print_report+0xcc/0x620 [ 35.797785] ? __virt_addr_valid+0x102/0x340 [ 35.798214] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.798688] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.799158] kasan_report+0xbe/0xf0 [ 35.799515] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.799990] vma_interval_tree_remove+0xc75/0xec0 [ 35.800449] vma_prepare+0xc54/0x11a0 [ 35.800816] __split_vma+0x5af/0x950 [ 35.801179] ? __pfx___split_vma+0x10/0x10 [ 35.801586] ? find_held_lock+0x2c/0x110 [ 35.801992] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.802435] ? lock_is_held_type+0x9f/0x120 [ 35.802848] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.803313] ? mtree_range_walk+0x632/0x900 [ 35.803745] ? mas_walk+0x5c7/0x7c0 [ 35.804113] do_vmi_munmap+0x1f1/0x2b0 [ 35.804489] mmap_region+0x1f9/0x2660 [ 35.804859] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.805260] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.805811] ? __pfx_lock_acquire+0x10/0x10 [ 35.806245] ? __pfx_mmap_region+0x10/0x10 [ 35.806657] ? security_mmap_addr+0x7d/0xa0 [ 35.807068] ? get_unmapped_area+0x1f5/0x3f0 [ 35.807492] do_mmap+0x854/0xf00 [ 35.807826] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.808206] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.808638] ksys_mmap_pgoff+0x3af/0x500 [ 35.809022] do_syscall_64+0x3f/0x90 [ 35.809393] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.809891] RIP: 0033:0x7ff1c4915d82 [ 35.810255] 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 [ 35.811893] RSP: 002b:00007ffeb4eb3f48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.812587] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff1c4915d82 [ 35.813243] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff1c3d4f000 [ 35.813894] RBP: 00007ff1c3d4f000 R08: 0000000000000009 R09: 0000000000001000 [ 35.814560] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ba6ad37f70 [ 35.815209] R13: 00007ffeb4eb3f60 R14: 00007ffeb4eb3f90 R15: 00007ffeb4eb42f0 [ 35.815863] </TASK> [ 35.816087] [ 35.816253] Allocated by task 213: [ 35.816583] kasan_save_stack+0x22/0x50 [ 35.816969] kasan_set_track+0x25/0x30 [ 35.817350] __kasan_slab_alloc+0x59/0x70 [ 35.817752] kmem_cache_alloc+0x16b/0x370 [ 35.818149] vm_area_dup+0x20/0x160 [ 35.818508] __split_vma+0x170/0x950 [ 35.818864] split_vma+0xc6/0x110 [ 35.819201] mprotect_fixup+0x8d2/0xb30 [ 35.819586] do_mprotect_pkey+0x87e/0xd40 [ 35.819988] __x64_sys_mprotect+0x78/0xc0 [ 35.820385] do_syscall_64+0x3f/0x90 [ 35.820748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.821243] [ 35.821407] Freed by task 211: [ 35.821710] kasan_save_stack+0x22/0x50 [ 35.822099] kasan_set_track+0x25/0x30 [ 35.822495] kasan_save_free_info+0x2b/0x50 [ 35.822909] __kasan_slab_free+0x10a/0x190 [ 35.823317] kmem_cache_free+0x10d/0x4d0 [ 35.823707] rcu_core+0x8c8/0x2860 [ 35.824047] __do_softirq+0x1b7/0x7d4 [ 35.824416] [ 35.824581] Last potentially related work creation: [ 35.825036] kasan_save_stack+0x22/0x50 [ 35.825421] __kasan_record_aux_stack+0x8e/0xa0 [ 35.825863] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.826364] remove_vma+0x139/0x170 [ 35.826713] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.827143] do_vmi_munmap+0x1f1/0x2b0 [ 35.827515] __vm_munmap+0x138/0x3a0 [ 35.827877] __x64_sys_munmap+0x59/0x80 [ 35.828261] do_syscall_64+0x3f/0x90 [ 35.828626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.829128] [ 35.829292] Second to last potentially related work creation: [ 35.829820] kasan_save_stack+0x22/0x50 [ 35.830221] __kasan_record_aux_stack+0x8e/0xa0 [ 35.830663] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.831159] remove_vma+0x139/0x170 [ 35.831504] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.831933] do_vmi_munmap+0x1f1/0x2b0 [ 35.832305] mmap_region+0x1f9/0x2660 [ 35.832670] do_mmap+0x854/0xf00 [ 35.833003] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.833380] ksys_mmap_pgoff+0x3af/0x500 [ 35.833763] do_syscall_64+0x3f/0x90 [ 35.834127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.834630] [ 35.834796] The buggy address belongs to the object at ffff88800e8e4740 [ 35.834796] which belongs to the cache vm_area_struct of size 168 [ 35.835937] The buggy address is located 88 bytes inside of [ 35.835937] freed 168-byte region [ffff88800e8e4740, ffff88800e8e47e8) [ 35.837017] [ 35.837182] The buggy address belongs to the physical page: [ 35.837689] page:000000000b3f498a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe8e4 [ 35.838530] memcg:ffff88800e3ed401 [ 35.838861] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.839401] page_type: 0xffffffff() [ 35.839749] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 35.840451] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3ed401 [ 35.841154] page dumped because: kasan: bad access detected [ 35.841661] [ 35.841825] Memory state around the buggy address: [ 35.842286] ffff88800e8e4680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.842945] ffff88800e8e4700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.843602] >ffff88800e8e4780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.844262] ^ [ 35.844641] ffff88800e8e4800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 35.845304] ffff88800e8e4880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 35.845960] ================================================================== [ 35.846893] Disabling lock debugging due to kernel taint [ 38.562383] BUG: Bad rss-counter state mm:0000000061639428 type:MM_FILEPAGES val:33 [ 38.563010] BUG: Bad rss-counter state mm:0000000061639428 type:MM_ANONPAGES val:22 [ 38.989864] BUG: Bad rss-counter state mm:00000000466f30e3 type:MM_FILEPAGES val:33 [ 38.990611] BUG: Bad rss-counter state mm:00000000466f30e3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5312' (ECDSA) to the list of known hosts. 2023/06/21 10:27:52 fuzzer started 2023/06/21 10:27:52 dialing manager at localhost:36067 2023/06/21 10:27:52 checking machine... 2023/06/21 10:27:52 checking revisions... [ 39.634391] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:27:52 testing simple program... [ 39.685232] cgroup: Unknown subsys name 'net' [ 39.745003] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:27:52 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=0000000040160d46 RCX=ffff88806c706a30 RDX=0000000000000007 RSI=0000000000000002 RDI=0000000024064766 RBP=ffff88800fd6d480 RSP=ffff88806ce09b10 R8 =000000002331ef7d R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88806ce09b78 R15=0000000000000007 RIP=ffffffff822704d3 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 00007f8a1fd06900 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=00007f00cf989470 CR3=0000000015b7c000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=ffff88801674f8b0 RSI=0000000000000000 RDI=ffff88801674f558 RBP=ffff888016748000 RSP=ffff88801674f518 R8 =ffffffff86138eb4 R9 =ffff88801674f588 R10=0000000000038001 R11=0000000000020d9c R12=ffff88801674f5a8 R13=ffff88801674f590 R14=ffff88801674f8a8 R15=ffff88801674f548 RIP=ffffffff81130930 RFL=00000292 [--S-A--] 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 00007f6da5af7700 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=00007ffd60e0b638 CR3=000000000dd7a000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732031353a3732 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323537 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000