syzkaller login: [ 28.712165] BUG: Bad rss-counter state mm:0000000094f1c46e type:MM_FILEPAGES val:33 [ 28.713219] BUG: Bad rss-counter state mm:0000000094f1c46e type:MM_ANONPAGES val:22 [ 28.881688] ================================================================== [ 28.882592] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.883533] Read of size 8 at addr ffff88801664aa50 by task sshd/220 [ 28.884335] [ 28.884563] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.885457] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.886443] Call Trace: [ 28.886760] [ 28.887045] dump_stack_lvl+0x91/0xf0 [ 28.887542] print_report+0xcc/0x620 [ 28.888079] ? __virt_addr_valid+0x102/0x340 [ 28.888641] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.889276] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.889902] kasan_report+0xbe/0xf0 [ 28.890382] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.891056] vma_interval_tree_remove+0xc75/0xec0 [ 28.891702] vma_prepare+0xc54/0x11a0 [ 28.892228] __split_vma+0x5af/0x950 [ 28.892704] ? __pfx___split_vma+0x10/0x10 [ 28.893237] ? find_held_lock+0x2c/0x110 [ 28.893763] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.894330] ? lock_is_held_type+0x9f/0x120 [ 28.894880] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.895501] ? mtree_range_walk+0x632/0x900 [ 28.896068] ? mas_walk+0x5c7/0x7c0 [ 28.896554] do_vmi_munmap+0x1f1/0x2b0 [ 28.897056] mmap_region+0x1f9/0x2660 [ 28.897549] ? mark_held_locks+0x9e/0xe0 [ 28.898059] ? lockdep_hardirqs_on_prepare+0x27b/0x3f0 [ 28.898706] ? asm_common_interrupt+0x26/0x40 [ 28.899269] ? __pfx_mmap_region+0x10/0x10 [ 28.899800] ? asm_common_interrupt+0x26/0x40 [ 28.900373] ? do_mmap+0x4ee/0xf00 [ 28.900840] do_mmap+0x854/0xf00 [ 28.901295] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.901801] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.902371] ksys_mmap_pgoff+0x3af/0x500 [ 28.902892] do_syscall_64+0x3f/0x90 [ 28.903376] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.904046] RIP: 0033:0x7f28ac65ad82 [ 28.904509] 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 [ 28.906662] RSP: 002b:00007fffc29c6328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.907604] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f28ac65ad82 [ 28.908469] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f28aba94000 [ 28.909342] RBP: 00007f28aba94000 R08: 0000000000000009 R09: 0000000000001000 [ 28.910196] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eab7e62b20 [ 28.911052] R13: 00007fffc29c6340 R14: 00007fffc29c6370 R15: 00007fffc29c66d0 [ 28.911947] [ 28.912253] [ 28.912470] Allocated by task 213: [ 28.912907] kasan_save_stack+0x22/0x50 [ 28.913423] kasan_set_track+0x25/0x30 [ 28.913935] __kasan_slab_alloc+0x59/0x70 [ 28.914472] kmem_cache_alloc+0x16b/0x370 [ 28.915002] vm_area_dup+0x20/0x160 [ 28.915468] __split_vma+0x170/0x950 [ 28.915950] split_vma+0xc6/0x110 [ 28.916398] mprotect_fixup+0x8d2/0xb30 [ 28.916911] do_mprotect_pkey+0x87e/0xd40 [ 28.917441] __x64_sys_mprotect+0x78/0xc0 [ 28.917974] do_syscall_64+0x3f/0x90 [ 28.918461] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.919119] [ 28.919336] Freed by task 213: [ 28.919746] kasan_save_stack+0x22/0x50 [ 28.920282] kasan_set_track+0x25/0x30 [ 28.920784] kasan_save_free_info+0x2b/0x50 [ 28.921331] __kasan_slab_free+0x10a/0x190 [ 28.921874] kmem_cache_free+0x10d/0x4d0 [ 28.922393] rcu_core+0x8c8/0x2860 [ 28.922846] __do_softirq+0x1b7/0x7d4 [ 28.923344] [ 28.923563] Last potentially related work creation: [ 28.924168] kasan_save_stack+0x22/0x50 [ 28.924681] __kasan_record_aux_stack+0x8e/0xa0 [ 28.925265] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.925925] remove_vma+0x139/0x170 [ 28.926384] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.926948] do_vmi_munmap+0x1f1/0x2b0 [ 28.927444] __vm_munmap+0x138/0x3a0 [ 28.927930] __x64_sys_munmap+0x59/0x80 [ 28.928440] do_syscall_64+0x3f/0x90 [ 28.928919] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.929576] [ 28.929792] Second to last potentially related work creation: [ 28.930482] kasan_save_stack+0x22/0x50 [ 28.930993] __kasan_record_aux_stack+0x8e/0xa0 [ 28.931581] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.932257] remove_vma+0x139/0x170 [ 28.932719] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.933287] do_vmi_munmap+0x1f1/0x2b0 [ 28.933778] mmap_region+0x1f9/0x2660 [ 28.934269] do_mmap+0x854/0xf00 [ 28.934707] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.935208] ksys_mmap_pgoff+0x3af/0x500 [ 28.935724] do_syscall_64+0x3f/0x90 [ 28.936219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.936884] [ 28.937104] The buggy address belongs to the object at ffff88801664a9f8 [ 28.937104] which belongs to the cache vm_area_struct of size 168 [ 28.938607] The buggy address is located 88 bytes inside of [ 28.938607] freed 168-byte region [ffff88801664a9f8, ffff88801664aaa0) [ 28.940041] [ 28.940264] The buggy address belongs to the physical page: [ 28.940935] page:00000000f795168f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1664a [ 28.942053] memcg:ffff88800f2ec801 [ 28.942482] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.943142] page_type: 0xffffffff() [ 28.943599] raw: 0100000000000200 ffff8880087a0c80 ffffea0000599240 000000000000000a [ 28.944547] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2ec801 [ 28.945475] page dumped because: kasan: bad access detected [ 28.946152] [ 28.946376] Memory state around the buggy address: [ 28.946968] ffff88801664a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.947853] ffff88801664a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 28.948737] >ffff88801664aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.949621] ^ [ 28.950353] ffff88801664aa80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 28.951223] ffff88801664ab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.952112] ================================================================== [ 28.953141] Disabling lock debugging due to kernel taint [ 30.745449] BUG: Bad rss-counter state mm:000000005612aac9 type:MM_FILEPAGES val:33 [ 30.746484] BUG: Bad rss-counter state mm:000000005612aac9 type:MM_ANONPAGES val:22 [ 31.291231] BUG: Bad rss-counter state mm:00000000022b93bd type:MM_FILEPAGES val:33 [ 31.292383] BUG: Bad rss-counter state mm:00000000022b93bd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32212' (ECDSA) to the list of known hosts. 2023/06/21 10:15:53 fuzzer started 2023/06/21 10:15:54 dialing manager at localhost:36067 2023/06/21 10:15:54 checking machine... 2023/06/21 10:15:54 checking revisions... [ 31.903249] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:15:54 testing simple program... [ 31.952381] cgroup: Unknown subsys name 'net' [ 31.983481] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:15:53 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff8613f6a2 RDX=0000000000000000 RSI=ffff88800f207a78 RDI=0000000000000001 RBP=ffff88800f2076a0 RSP=ffff88800f2075d8 R8 =ffffffff8613f6a6 R9 =ffff88800f207688 R10=0000000000038001 R11=0000000000021ee8 R12=ffff88800f2076a8 R13=ffff88800f207690 R14=ffff88800f207a80 R15=ffff88800f207648 RIP=ffffffff8113100c 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 00007f37b21ec900 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=00007f37b27a40b0 CR3=000000000ddce000 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=ffffffff81846877 RBX=ffff888018c3a2f0 RCX=ffffffff812e0135 RDX=1ffff110037c4f0c RSI=0000000000000004 RDI=ffff88806cf09d78 RBP=ffff88801be27850 RSP=ffff88806cf09df0 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6a61 R12=0000000000000202 R13=ffff88801be27890 R14=ffffffff813782f8 R15=ffff88800e8c4780 RIP=ffffffff84535d43 RFL=00000086 [--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 00007f3f47e8a700 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=00007fb919559c00 CR3=0000000019df8000 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=3a5d3033325b646873732033353a3531 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383838 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000