syzkaller login: [ 39.139565] BUG: Bad rss-counter state mm:00000000614e3a04 type:MM_FILEPAGES val:33 [ 39.140825] BUG: Bad rss-counter state mm:00000000614e3a04 type:MM_ANONPAGES val:22 [ 39.307517] ================================================================== [ 39.308510] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.309514] Read of size 8 at addr ffff8880144cbd08 by task sshd/219 [ 39.310342] [ 39.310714] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.311676] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.312724] Call Trace: [ 39.313079] [ 39.313384] dump_stack_lvl+0x91/0xf0 [ 39.313912] print_report+0xcc/0x620 [ 39.314433] ? __virt_addr_valid+0x102/0x340 [ 39.315026] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.315698] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.316361] kasan_report+0xbe/0xf0 [ 39.316872] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.317547] vma_interval_tree_remove+0xc75/0xec0 [ 39.318198] vma_prepare+0xc54/0x11a0 [ 39.318718] __split_vma+0x5af/0x950 [ 39.319231] ? __pfx___split_vma+0x10/0x10 [ 39.319829] ? find_held_lock+0x2c/0x110 [ 39.320398] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.321007] ? lock_is_held_type+0x9f/0x120 [ 39.321591] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.322244] ? mtree_range_walk+0x632/0x900 [ 39.322845] ? mas_walk+0x5c7/0x7c0 [ 39.323386] do_vmi_munmap+0x1f1/0x2b0 [ 39.323914] mmap_region+0x1f9/0x2660 [ 39.324438] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.324996] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.325766] ? __pfx_lock_acquire+0x10/0x10 [ 39.326341] ? __pfx_mmap_region+0x10/0x10 [ 39.326912] ? security_mmap_addr+0x7d/0xa0 [ 39.327492] ? get_unmapped_area+0x1f5/0x3f0 [ 39.328082] do_mmap+0x854/0xf00 [ 39.328556] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.329086] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.329686] ksys_mmap_pgoff+0x3af/0x500 [ 39.330239] do_syscall_64+0x3f/0x90 [ 39.330756] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.331464] RIP: 0033:0x7f28a9520d82 [ 39.331958] 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 [ 39.334317] RSP: 002b:00007ffc26758218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.335341] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f28a9520d82 [ 39.336266] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f28a895a000 [ 39.337193] RBP: 00007f28a895a000 R08: 0000000000000009 R09: 0000000000001000 [ 39.338113] R10: 0000000000000812 R11: 0000000000000206 R12: 000056400f45fec0 [ 39.339029] R13: 00007ffc26758230 R14: 00007ffc26758260 R15: 00007ffc267585c0 [ 39.339961] [ 39.340272] [ 39.340513] Allocated by task 212: [ 39.340982] kasan_save_stack+0x22/0x50 [ 39.341533] kasan_set_track+0x25/0x30 [ 39.342062] __kasan_slab_alloc+0x59/0x70 [ 39.342623] kmem_cache_alloc+0x16b/0x370 [ 39.343171] vm_area_dup+0x20/0x160 [ 39.343678] __split_vma+0x170/0x950 [ 39.344176] split_vma+0xc6/0x110 [ 39.344718] mprotect_fixup+0x8d2/0xb30 [ 39.345241] do_mprotect_pkey+0x87e/0xd40 [ 39.345768] __x64_sys_mprotect+0x78/0xc0 [ 39.346285] do_syscall_64+0x3f/0x90 [ 39.346775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.347448] [ 39.347663] Freed by task 212: [ 39.348065] kasan_save_stack+0x22/0x50 [ 39.348578] kasan_set_track+0x25/0x30 [ 39.349074] kasan_save_free_info+0x2b/0x50 [ 39.349611] __kasan_slab_free+0x10a/0x190 [ 39.350145] kmem_cache_free+0x10d/0x4d0 [ 39.350651] rcu_core+0x8c8/0x2860 [ 39.351112] __do_softirq+0x1b7/0x7d4 [ 39.351613] [ 39.351935] Last potentially related work creation: [ 39.352529] kasan_save_stack+0x22/0x50 [ 39.353047] __kasan_record_aux_stack+0x8e/0xa0 [ 39.353628] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.354280] remove_vma+0x139/0x170 [ 39.354745] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.355329] do_vmi_munmap+0x1f1/0x2b0 [ 39.355815] __vm_munmap+0x138/0x3a0 [ 39.356291] __x64_sys_munmap+0x59/0x80 [ 39.356797] do_syscall_64+0x3f/0x90 [ 39.357277] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.357921] [ 39.358134] The buggy address belongs to the object at ffff8880144cbcb0 [ 39.358134] which belongs to the cache vm_area_struct of size 168 [ 39.359631] The buggy address is located 88 bytes inside of [ 39.359631] freed 168-byte region [ffff8880144cbcb0, ffff8880144cbd58) [ 39.361047] [ 39.361263] The buggy address belongs to the physical page: [ 39.361944] page:00000000236f8252 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x144cb [ 39.363036] memcg:ffff88800edaf901 [ 39.363474] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.364121] page_type: 0xffffffff() [ 39.364575] raw: 0100000000000200 ffff88800879fc80 ffffea00003a2f40 dead000000000008 [ 39.365541] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edaf901 [ 39.366482] page dumped because: kasan: bad access detected [ 39.367189] [ 39.367440] Memory state around the buggy address: [ 39.368024] ffff8880144cbc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 39.368880] ffff8880144cbc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.369743] >ffff8880144cbd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.370599] ^ [ 39.371055] ffff8880144cbd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.371905] ffff8880144cbe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 39.372740] ================================================================== [ 39.373926] Disabling lock debugging due to kernel taint [ 41.734251] BUG: Bad rss-counter state mm:000000008fee3e28 type:MM_FILEPAGES val:33 [ 41.735412] BUG: Bad rss-counter state mm:000000008fee3e28 type:MM_ANONPAGES val:22 [ 42.268674] BUG: Bad rss-counter state mm:00000000cda252b7 type:MM_FILEPAGES val:33 [ 42.269837] BUG: Bad rss-counter state mm:00000000cda252b7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14560' (ECDSA) to the list of known hosts. 2023/06/20 00:26:40 fuzzer started 2023/06/20 00:26:40 dialing manager at localhost:44161 2023/06/20 00:26:40 checking machine... 2023/06/20 00:26:40 checking revisions... [ 42.959143] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:26:40 testing simple program... [ 43.008723] cgroup: Unknown subsys name 'net' [ 43.070691] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:26:39 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d7f9e8 RCX=ffffffff81132ffe RDX=1ffff110011aff33 RSI=ffff888008d70000 RDI=ffff888008d7f900 RBP=ffff888008d70000 RSP=ffff888008d7f900 R8 =0000000000000130 R9 =0000000000000000 R10=ffff888008d7f950 R11=0000000000000128 R12=ffff888008d7f970 R13=ffff888008d7f978 R14=ffff888008d7f998 R15=ffff888008d7f950 RIP=ffffffff81132f0b 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 0000000000000000 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=00007fdd08aac650 CR3=000000000be86000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff81534376 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff813790f9 RSP=ffff88806cf09e40 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=1ffff1100d9e7479 R12=ffffffff85616740 R13=ffff88806cf09ee8 R14=0000000000000200 R15=ffff88806cf3a360 RIP=ffffffff8135b910 RFL=00000016 [----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 00007f9a66087900 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=00007f9a654a47f0 CR3=000000000ca38000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=47ac6eca2709965100000000000ae988 XMM05=0839718bfa35532f0000000000135398 XMM06=806171799158d9670000000000133810 XMM07=fb795ef6d65770560000000000124068 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000