syzkaller login: [ 58.784753] BUG: Bad rss-counter state mm:00000000fa7048f9 type:MM_FILEPAGES val:33 [ 58.786423] BUG: Bad rss-counter state mm:00000000fa7048f9 type:MM_ANONPAGES val:22 [ 58.936982] ================================================================== [ 58.937977] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 58.938975] Read of size 8 at addr ffff88800e742058 by task sshd/220 [ 58.939893] [ 58.940127] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 58.941038] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 58.942102] Call Trace: [ 58.942442] [ 58.942743] dump_stack_lvl+0x91/0xf0 [ 58.943269] print_report+0xcc/0x620 [ 58.943780] ? __virt_addr_valid+0x102/0x340 [ 58.944367] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.945057] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.945732] kasan_report+0xbe/0xf0 [ 58.946256] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.946942] vma_interval_tree_remove+0xc75/0xec0 [ 58.947586] vma_prepare+0xc54/0x11a0 [ 58.948100] __split_vma+0x5af/0x950 [ 58.948609] ? __pfx___split_vma+0x10/0x10 [ 58.949181] ? find_held_lock+0x2c/0x110 [ 58.949766] do_vmi_align_munmap+0x2ba/0x11f0 [ 58.950375] ? lock_is_held_type+0x9f/0x120 [ 58.950956] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 58.951609] ? mtree_range_walk+0x632/0x900 [ 58.952198] ? mas_walk+0x5c7/0x7c0 [ 58.952713] do_vmi_munmap+0x1f1/0x2b0 [ 58.953239] mmap_region+0x1f9/0x2660 [ 58.953761] ? vm_mmap_pgoff+0x15c/0x3a0 [ 58.954303] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 58.955078] ? __pfx_lock_acquire+0x10/0x10 [ 58.955642] ? __pfx_mmap_region+0x10/0x10 [ 58.956200] ? security_mmap_addr+0x7d/0xa0 [ 58.956758] ? get_unmapped_area+0x1f5/0x3f0 [ 58.957354] do_mmap+0x854/0xf00 [ 58.957851] vm_mmap_pgoff+0x1a6/0x3a0 [ 58.958371] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 58.958969] ksys_mmap_pgoff+0x3af/0x500 [ 58.959508] do_syscall_64+0x3f/0x90 [ 58.960024] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.960702] RIP: 0033:0x7f0482036d82 [ 58.961185] 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 [ 58.963442] RSP: 002b:00007ffc3967a1d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 58.964419] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0482036d82 [ 58.965321] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0481470000 [ 58.966238] RBP: 00007f0481470000 R08: 0000000000000009 R09: 0000000000001000 [ 58.967144] R10: 0000000000000812 R11: 0000000000000206 R12: 000055727e4b8d90 [ 58.968046] R13: 00007ffc3967a1f0 R14: 00007ffc3967a220 R15: 00007ffc3967a580 [ 58.968963] [ 58.969272] [ 58.969503] Allocated by task 213: [ 58.969967] kasan_save_stack+0x22/0x50 [ 58.970504] kasan_set_track+0x25/0x30 [ 58.971023] __kasan_slab_alloc+0x59/0x70 [ 58.971576] kmem_cache_alloc+0x16b/0x370 [ 58.972118] vm_area_dup+0x20/0x160 [ 58.972594] __split_vma+0x170/0x950 [ 58.973085] split_vma+0xc6/0x110 [ 58.973550] mprotect_fixup+0x8d2/0xb30 [ 58.974088] do_mprotect_pkey+0x87e/0xd40 [ 58.974644] __x64_sys_mprotect+0x78/0xc0 [ 58.975189] do_syscall_64+0x3f/0x90 [ 58.975687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.976360] [ 58.976586] Freed by task 213: [ 58.977003] kasan_save_stack+0x22/0x50 [ 58.977529] kasan_set_track+0x25/0x30 [ 58.978069] kasan_save_free_info+0x2b/0x50 [ 58.978632] __kasan_slab_free+0x10a/0x190 [ 58.979192] kmem_cache_free+0x10d/0x4d0 [ 58.979730] rcu_core+0x8c8/0x2860 [ 58.980204] __do_softirq+0x1b7/0x7d4 [ 58.980722] [ 58.980951] Last potentially related work creation: [ 58.981572] kasan_save_stack+0x22/0x50 [ 58.982120] __kasan_record_aux_stack+0x8e/0xa0 [ 58.982733] __call_rcu_common.constprop.0+0x6a/0xb90 [ 58.983413] remove_vma+0x139/0x170 [ 58.983901] do_vmi_align_munmap+0xd4a/0x11f0 [ 58.984500] do_vmi_munmap+0x1f1/0x2b0 [ 58.985024] __vm_munmap+0x138/0x3a0 [ 58.985521] __x64_sys_munmap+0x59/0x80 [ 58.986075] do_syscall_64+0x3f/0x90 [ 58.986588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.987296] [ 58.987530] The buggy address belongs to the object at ffff88800e742000 [ 58.987530] which belongs to the cache vm_area_struct of size 168 [ 58.989095] The buggy address is located 88 bytes inside of [ 58.989095] freed 168-byte region [ffff88800e742000, ffff88800e7420a8) [ 58.990586] [ 58.990815] The buggy address belongs to the physical page: [ 58.991508] page:00000000e372c274 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe742 [ 58.992652] memcg:ffff88800f55c201 [ 58.993105] flags: 0x100000000000200(slab|node=0|zone=1) [ 58.993796] page_type: 0xffffffff() [ 58.994276] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 58.995262] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f55c201 [ 58.996237] page dumped because: kasan: bad access detected [ 58.996955] [ 58.997186] Memory state around the buggy address: [ 58.997840] ffff88800e741f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 58.998761] ffff88800e741f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 58.999672] >ffff88800e742000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.000586] ^ [ 59.001361] ffff88800e742080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 59.002280] ffff88800e742100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.003185] ================================================================== [ 59.004238] Disabling lock debugging due to kernel taint [ 61.456779] BUG: Bad rss-counter state mm:000000008321aceb type:MM_FILEPAGES val:33 [ 61.458049] BUG: Bad rss-counter state mm:000000008321aceb type:MM_ANONPAGES val:22 [ 61.852676] BUG: Bad rss-counter state mm:00000000cfefd441 type:MM_FILEPAGES val:33 [ 61.853702] BUG: Bad rss-counter state mm:00000000cfefd441 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5761' (ECDSA) to the list of known hosts. 2023/06/21 05:19:39 fuzzer started 2023/06/21 05:19:39 dialing manager at localhost:36067 2023/06/21 05:19:40 checking machine... 2023/06/21 05:19:40 checking revisions... [ 62.455675] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:19:40 testing simple program... [ 62.501861] cgroup: Unknown subsys name 'net' [ 62.553123] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:19:39 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888014657288 RCX=0000000000000001 RDX=1ffff110028cae5c RSI=ffff888014657690 RDI=ffff888014657288 RBP=ffff8880146572e0 RSP=ffff888014657270 R8 =0000000000000001 R9 =ffff8880146572c8 R10=0000000000038001 R11=0000000000021ee8 R12=ffff888014657350 R13=0000000000000000 R14=ffff88800fe13680 R15=0000000000092cc0 RIP=ffffffff8113038e 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 00007f6f7d94a900 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=00007f6f7cd86380 CR3=000000000d5c0000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=022212bef85b635b00000000000ae988 XMM05=dcf44b0600e75d2c0000000000133990 XMM06=4fda316b135da52b0000000000132a30 XMM07=fb795ef6d65770560000000000122fb0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff818083e8 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11003389e4c RSI=ffffffff818083e8 RDI=ffff888019c4f2d0 RBP=ffff888019c4f2a0 RSP=ffff888019c4f200 R8 =0000000000000001 R9 =ffff888019c4f248 R10=0000000000038001 R11=0000000000020de5 R12=ffff888019c4f2d0 R13=0000000000000000 R14=ffff888016961b40 R15=0000000000000cc0 RIP=ffffffff813ad474 RFL=00000286 [--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 00007f70ed71f900 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=00007fff40308000 CR3=000000000cb62000 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=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