syzkaller login: [ 31.613030] BUG: Bad rss-counter state mm:000000007f62917b type:MM_FILEPAGES val:33 [ 31.614461] BUG: Bad rss-counter state mm:000000007f62917b type:MM_ANONPAGES val:22 [ 31.774962] ================================================================== [ 31.776093] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.777128] Read of size 8 at addr ffff8880165b55c8 by task sshd/220 [ 31.778100] [ 31.778323] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.779211] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.780224] Call Trace: [ 31.780552] [ 31.780878] dump_stack_lvl+0x91/0xf0 [ 31.781377] print_report+0xcc/0x620 [ 31.781862] ? __virt_addr_valid+0x102/0x340 [ 31.782417] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.783035] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.783703] kasan_report+0xbe/0xf0 [ 31.784189] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.784822] vma_interval_tree_remove+0xc75/0xec0 [ 31.785422] vma_prepare+0xc54/0x11a0 [ 31.785907] __split_vma+0x5af/0x950 [ 31.786382] ? __pfx___split_vma+0x10/0x10 [ 31.786910] ? find_held_lock+0x2c/0x110 [ 31.787431] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.788029] ? lock_is_held_type+0x9f/0x120 [ 31.788580] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.789189] ? mtree_range_walk+0x632/0x900 [ 31.789741] ? mas_walk+0x5c7/0x7c0 [ 31.790214] do_vmi_munmap+0x1f1/0x2b0 [ 31.790711] mmap_region+0x1f9/0x2660 [ 31.791193] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.791729] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.792478] ? __pfx_lock_acquire+0x10/0x10 [ 31.793038] ? __pfx_mmap_region+0x10/0x10 [ 31.793587] ? security_mmap_addr+0x7d/0xa0 [ 31.794117] ? get_unmapped_area+0x1f5/0x3f0 [ 31.794674] do_mmap+0x854/0xf00 [ 31.795118] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.795638] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.796199] ksys_mmap_pgoff+0x3af/0x500 [ 31.796711] do_syscall_64+0x3f/0x90 [ 31.797202] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.797852] RIP: 0033:0x7fe8519b2d82 [ 31.798313] 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 [ 31.800466] RSP: 002b:00007ffdb5dc35f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.801394] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe8519b2d82 [ 31.802249] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe850dec000 [ 31.803099] RBP: 00007fe850dec000 R08: 0000000000000009 R09: 0000000000001000 [ 31.803972] R10: 0000000000000812 R11: 0000000000000206 R12: 000055913eeafd90 [ 31.804824] R13: 00007ffdb5dc3610 R14: 00007ffdb5dc3640 R15: 00007ffdb5dc39a0 [ 31.805691] [ 31.805981] [ 31.806205] Allocated by task 213: [ 31.806634] kasan_save_stack+0x22/0x50 [ 31.807143] kasan_set_track+0x25/0x30 [ 31.807654] __kasan_slab_alloc+0x59/0x70 [ 31.808178] kmem_cache_alloc+0x16b/0x370 [ 31.808704] vm_area_dup+0x20/0x160 [ 31.809170] __split_vma+0x170/0x950 [ 31.809647] split_vma+0xc6/0x110 [ 31.810096] mprotect_fixup+0x8d2/0xb30 [ 31.810604] do_mprotect_pkey+0x87e/0xd40 [ 31.811128] __x64_sys_mprotect+0x78/0xc0 [ 31.811675] do_syscall_64+0x3f/0x90 [ 31.812162] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.812811] [ 31.813030] Freed by task 213: [ 31.813419] kasan_save_stack+0x22/0x50 [ 31.813929] kasan_set_track+0x25/0x30 [ 31.814431] kasan_save_free_info+0x2b/0x50 [ 31.814972] __kasan_slab_free+0x10a/0x190 [ 31.815524] kmem_cache_free+0x10d/0x4d0 [ 31.816035] rcu_core+0x8c8/0x2860 [ 31.816478] __do_softirq+0x1b7/0x7d4 [ 31.816968] [ 31.817187] Last potentially related work creation: [ 31.817791] kasan_save_stack+0x22/0x50 [ 31.818299] __kasan_record_aux_stack+0x8e/0xa0 [ 31.818881] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.819580] remove_vma+0x139/0x170 [ 31.820034] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.820591] do_vmi_munmap+0x1f1/0x2b0 [ 31.821087] __vm_munmap+0x138/0x3a0 [ 31.821558] __x64_sys_munmap+0x59/0x80 [ 31.822058] do_syscall_64+0x3f/0x90 [ 31.822541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.823196] [ 31.823418] The buggy address belongs to the object at ffff8880165b5570 [ 31.823418] which belongs to the cache vm_area_struct of size 168 [ 31.824915] The buggy address is located 88 bytes inside of [ 31.824915] freed 168-byte region [ffff8880165b5570, ffff8880165b5618) [ 31.826353] [ 31.826575] The buggy address belongs to the physical page: [ 31.827236] page:00000000ce091c0b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x165b5 [ 31.828338] memcg:ffff8880146e9d01 [ 31.828766] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.829411] page_type: 0xffffffff() [ 31.829861] raw: 0100000000000200 ffff88800879fc80 ffffea0000311c80 dead000000000008 [ 31.830785] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880146e9d01 [ 31.831721] page dumped because: kasan: bad access detected [ 31.832381] [ 31.832604] Memory state around the buggy address: [ 31.833183] ffff8880165b5480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.834046] ffff8880165b5500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.834906] >ffff8880165b5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.835820] ^ [ 31.836511] ffff8880165b5600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.837386] ffff8880165b5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.838263] ================================================================== [ 31.839201] Disabling lock debugging due to kernel taint [ 34.029291] BUG: Bad rss-counter state mm:000000005a4871a7 type:MM_FILEPAGES val:33 [ 34.030249] BUG: Bad rss-counter state mm:000000005a4871a7 type:MM_ANONPAGES val:22 [ 34.503752] BUG: Bad rss-counter state mm:00000000fc2c4192 type:MM_FILEPAGES val:33 [ 34.504706] BUG: Bad rss-counter state mm:00000000fc2c4192 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15072' (ECDSA) to the list of known hosts. 2023/06/19 18:35:46 fuzzer started 2023/06/19 18:35:46 dialing manager at localhost:44161 2023/06/19 18:35:46 checking machine... 2023/06/19 18:35:46 checking revisions... [ 35.220224] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:35:46 testing simple program... [ 35.265803] cgroup: Unknown subsys name 'net' [ 35.321779] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:35:45 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=00007fe384007640 RCX=00000000000000a4 RDX=0000000000000000 RSI=0000000000000000 RDI=00007fe384007658 RBP=00007fe384007640 RSP=00007fe38a26f708 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000003 R11=0000000000000286 R12=00007fe384007658 R13=00007fe384007640 R14=0000564996967ec0 R15=0000000000000000 RIP=00007fe38b0adeb9 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe38a270700 00000000 00000000 GS =0000 0000000000000000 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=00007f1e514a8970 CR3=000000000fbea000 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=2036343a35333a3831203931206e754a XMM01=5f687373203a726f727265203a5d3733 XMM02=632079746972756365732078756e694c XMM03=742064656c696146203a656d616e7962 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a35333a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000000 RDX=ffff888015d48000 RSI=ffffffff84493ec3 RDI=0000000000000007 RBP=ffff888019c4f788 RSP=ffff888019c4f0e0 R8 =0000000000000007 R9 =0000000000000000 R10=00007f89a0feffff R11=0000563ff17e1000 R12=0000000000000005 R13=00007f89a0feffff R14=ffff888019c4f768 R15=0000000000000002 RIP=ffffffff814c081b 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 00007f89a103d900 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=00007f89a101c020 CR3=0000000016f3a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000