syzkaller login: [ 30.722046] BUG: Bad rss-counter state mm:00000000ca6e9288 type:MM_FILEPAGES val:33 [ 30.724178] BUG: Bad rss-counter state mm:00000000ca6e9288 type:MM_ANONPAGES val:22 [ 30.906510] ================================================================== [ 30.907586] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.908690] Read of size 8 at addr ffff88801586e880 by task sshd/222 [ 30.909701] [ 30.909963] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.910835] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.911827] Call Trace: [ 30.912151] [ 30.912440] dump_stack_lvl+0x91/0xf0 [ 30.912929] print_report+0xcc/0x620 [ 30.913407] ? __virt_addr_valid+0x102/0x340 [ 30.913963] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.914593] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.915217] kasan_report+0xbe/0xf0 [ 30.915710] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.916328] vma_interval_tree_remove+0xc75/0xec0 [ 30.916928] vma_prepare+0xc54/0x11a0 [ 30.917407] __split_vma+0x5af/0x950 [ 30.917880] ? __pfx___split_vma+0x10/0x10 [ 30.918407] ? find_held_lock+0x2c/0x110 [ 30.918932] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.919522] ? lock_is_held_type+0x9f/0x120 [ 30.920069] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.920677] ? mtree_range_walk+0x632/0x900 [ 30.921232] ? mas_walk+0x5c7/0x7c0 [ 30.921708] do_vmi_munmap+0x1f1/0x2b0 [ 30.922204] mmap_region+0x1f9/0x2660 [ 30.922689] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.923204] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.923928] ? __pfx_lock_acquire+0x10/0x10 [ 30.924463] ? __pfx_mmap_region+0x10/0x10 [ 30.924998] ? security_mmap_addr+0x7d/0xa0 [ 30.925529] ? get_unmapped_area+0x1f5/0x3f0 [ 30.926083] do_mmap+0x854/0xf00 [ 30.926524] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.927025] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.927601] ksys_mmap_pgoff+0x3af/0x500 [ 30.928109] do_syscall_64+0x3f/0x90 [ 30.928588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.929235] RIP: 0033:0x7f4ba27a4d82 [ 30.929696] 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 [ 30.931830] RSP: 002b:00007fffa2444268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.932732] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4ba27a4d82 [ 30.933581] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4ba1bde000 [ 30.934430] RBP: 00007f4ba1bde000 R08: 0000000000000009 R09: 0000000000001000 [ 30.935284] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559885b79b20 [ 30.936126] R13: 00007fffa2444280 R14: 00007fffa24442b0 R15: 00007fffa2444610 [ 30.936983] [ 30.937280] [ 30.937496] Allocated by task 215: [ 30.937917] kasan_save_stack+0x22/0x50 [ 30.938418] kasan_set_track+0x25/0x30 [ 30.938914] __kasan_slab_alloc+0x59/0x70 [ 30.939442] kmem_cache_alloc+0x16b/0x370 [ 30.939997] vm_area_dup+0x20/0x160 [ 30.940458] __split_vma+0x170/0x950 [ 30.940927] split_vma+0xc6/0x110 [ 30.941371] mprotect_fixup+0x8d2/0xb30 [ 30.941874] do_mprotect_pkey+0x87e/0xd40 [ 30.942396] __x64_sys_mprotect+0x78/0xc0 [ 30.942914] do_syscall_64+0x3f/0x90 [ 30.943389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.944047] [ 30.944262] Freed by task 19: [ 30.944641] kasan_save_stack+0x22/0x50 [ 30.945149] kasan_set_track+0x25/0x30 [ 30.945640] kasan_save_free_info+0x2b/0x50 [ 30.946173] __kasan_slab_free+0x10a/0x190 [ 30.946705] kmem_cache_free+0x10d/0x4d0 [ 30.947213] rcu_core+0x8c8/0x2860 [ 30.947661] __do_softirq+0x1b7/0x7d4 [ 30.948135] [ 30.948351] Last potentially related work creation: [ 30.948929] kasan_save_stack+0x22/0x50 [ 30.949431] __kasan_record_aux_stack+0x8e/0xa0 [ 30.950006] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.950650] remove_vma+0x139/0x170 [ 30.951096] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.951679] do_vmi_munmap+0x1f1/0x2b0 [ 30.952164] __vm_munmap+0x138/0x3a0 [ 30.952627] __x64_sys_munmap+0x59/0x80 [ 30.953130] do_syscall_64+0x3f/0x90 [ 30.953610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.954252] [ 30.954469] The buggy address belongs to the object at ffff88801586e828 [ 30.954469] which belongs to the cache vm_area_struct of size 168 [ 30.955942] The buggy address is located 88 bytes inside of [ 30.955942] freed 168-byte region [ffff88801586e828, ffff88801586e8d0) [ 30.957328] [ 30.957545] The buggy address belongs to the physical page: [ 30.958203] page:000000005596a9d8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1586e [ 30.959282] memcg:ffff888016b77a01 [ 30.959720] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.960372] page_type: 0xffffffff() [ 30.960822] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.961729] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b77a01 [ 30.962633] page dumped because: kasan: bad access detected [ 30.963291] [ 30.963513] Memory state around the buggy address: [ 30.964092] ffff88801586e780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.964953] ffff88801586e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.965809] >ffff88801586e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.966664] ^ [ 30.967077] ffff88801586e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.967953] ffff88801586e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.968794] ================================================================== [ 30.969778] Disabling lock debugging due to kernel taint [ 32.894567] BUG: Bad rss-counter state mm:000000000ab5f9d2 type:MM_FILEPAGES val:33 [ 32.895609] BUG: Bad rss-counter state mm:000000000ab5f9d2 type:MM_ANONPAGES val:22 [ 33.368176] BUG: Bad rss-counter state mm:0000000008b50043 type:MM_FILEPAGES val:33 [ 33.369191] BUG: Bad rss-counter state mm:0000000008b50043 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13270' (ECDSA) to the list of known hosts. 2023/06/21 06:05:44 fuzzer started 2023/06/21 06:05:44 dialing manager at localhost:36067 2023/06/21 06:05:44 checking machine... 2023/06/21 06:05:44 checking revisions... [ 34.076635] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:05:44 testing simple program... [ 34.123347] cgroup: Unknown subsys name 'net' [ 34.167055] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:05:43 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=dffffc0000000000 RCX=ffffffff81ef7234 RDX=0000000000000005 RSI=0000000000000005 RDI=0000000000000004 RBP=0000000000000001 RSP=ffff88801c9cfb60 R8 =0000000000000004 R9 =0000000000000005 R10=0000000000000005 R11=0000000000000000 R12=ffff888008cce548 R13=0000000000000007 R14=0000000000000005 R15=0000000000000005 RIP=ffffffff814c0250 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 00007fdc3dcb5900 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=00007ffd8424f000 CR3=000000001ca4e000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 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=00007f0b233d27e0 CR3=000000000f606000 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=7647fbd5451b3f9ab8484d01ec60f7e5 XMM02=ec2efd57dc4c00df000000000011a408 XMM03=4219a30346222b8c000000000011a4d8 XMM04=092af9e461d9851200000000000ae988 XMM05=59d5b690e0af863b0000000000131b78 XMM06=5d77f5f012373c9900000000001309e0 XMM07=e042d86d42eb936e0000000000121fa0 XMM08=4219a30346222b8c000000000011a4d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000