syzkaller login: [ 41.056732] BUG: Bad rss-counter state mm:00000000f106bcb4 type:MM_FILEPAGES val:33 [ 41.057943] BUG: Bad rss-counter state mm:00000000f106bcb4 type:MM_ANONPAGES val:22 [ 41.221428] ================================================================== [ 41.222490] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.223442] Read of size 8 at addr ffff88801960c880 by task sshd/219 [ 41.224166] [ 41.224372] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.225221] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.226147] Call Trace: [ 41.226447] [ 41.226719] dump_stack_lvl+0x91/0xf0 [ 41.227188] print_report+0xcc/0x620 [ 41.227641] ? __virt_addr_valid+0x102/0x340 [ 41.228172] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.228750] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.229328] kasan_report+0xbe/0xf0 [ 41.229778] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.230370] vma_interval_tree_remove+0xc75/0xec0 [ 41.230958] vma_prepare+0xc54/0x11a0 [ 41.231439] __split_vma+0x5af/0x950 [ 41.231898] ? __pfx___split_vma+0x10/0x10 [ 41.232419] ? find_held_lock+0x2c/0x110 [ 41.232944] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.233503] ? lock_is_held_type+0x9f/0x120 [ 41.234052] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.234668] ? mtree_range_walk+0x632/0x900 [ 41.235248] ? mas_walk+0x5c7/0x7c0 [ 41.235759] do_vmi_munmap+0x1f1/0x2b0 [ 41.236307] mmap_region+0x1f9/0x2660 [ 41.236846] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.237406] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.238185] ? __pfx_lock_acquire+0x10/0x10 [ 41.238730] ? __pfx_mmap_region+0x10/0x10 [ 41.239270] ? security_mmap_addr+0x7d/0xa0 [ 41.239829] ? get_unmapped_area+0x1f5/0x3f0 [ 41.240381] do_mmap+0x854/0xf00 [ 41.240825] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.241326] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.241903] ksys_mmap_pgoff+0x3af/0x500 [ 41.242440] do_syscall_64+0x3f/0x90 [ 41.242940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.243598] RIP: 0033:0x7f9ce0eded82 [ 41.244066] 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 [ 41.246268] RSP: 002b:00007fff57c0c698 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.247196] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ce0eded82 [ 41.248067] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ce0318000 [ 41.248943] RBP: 00007f9ce0318000 R08: 0000000000000009 R09: 0000000000001000 [ 41.249809] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f745876f70 [ 41.250679] R13: 00007fff57c0c6b0 R14: 00007fff57c0c6e0 R15: 00007fff57c0ca40 [ 41.251542] [ 41.251836] [ 41.252055] Allocated by task 212: [ 41.252484] kasan_save_stack+0x22/0x50 [ 41.253001] kasan_set_track+0x25/0x30 [ 41.253505] __kasan_slab_alloc+0x59/0x70 [ 41.254052] kmem_cache_alloc+0x16b/0x370 [ 41.254583] vm_area_dup+0x20/0x160 [ 41.255040] __split_vma+0x170/0x950 [ 41.255515] split_vma+0xc6/0x110 [ 41.255959] mprotect_fixup+0x8d2/0xb30 [ 41.256468] do_mprotect_pkey+0x87e/0xd40 [ 41.256996] __x64_sys_mprotect+0x78/0xc0 [ 41.257521] do_syscall_64+0x3f/0x90 [ 41.258008] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.258658] [ 41.258884] Freed by task 212: [ 41.259283] kasan_save_stack+0x22/0x50 [ 41.259801] kasan_set_track+0x25/0x30 [ 41.260297] kasan_save_free_info+0x2b/0x50 [ 41.260838] __kasan_slab_free+0x10a/0x190 [ 41.261370] kmem_cache_free+0x10d/0x4d0 [ 41.261890] rcu_core+0x8c8/0x2860 [ 41.262365] __do_softirq+0x1b7/0x7d4 [ 41.262855] [ 41.263073] Last potentially related work creation: [ 41.263657] kasan_save_stack+0x22/0x50 [ 41.264160] __kasan_record_aux_stack+0x8e/0xa0 [ 41.264747] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.265390] remove_vma+0x139/0x170 [ 41.265868] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.266434] do_vmi_munmap+0x1f1/0x2b0 [ 41.266922] __vm_munmap+0x138/0x3a0 [ 41.267397] __x64_sys_munmap+0x59/0x80 [ 41.267907] do_syscall_64+0x3f/0x90 [ 41.268390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.269037] [ 41.269254] The buggy address belongs to the object at ffff88801960c828 [ 41.269254] which belongs to the cache vm_area_struct of size 168 [ 41.270766] The buggy address is located 88 bytes inside of [ 41.270766] freed 168-byte region [ffff88801960c828, ffff88801960c8d0) [ 41.272181] [ 41.272403] The buggy address belongs to the physical page: [ 41.273075] page:00000000b3fd29ff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1960c [ 41.274199] memcg:ffff88800e12ac01 [ 41.274632] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.275280] page_type: 0xffffffff() [ 41.275740] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.276654] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e12ac01 [ 41.277610] page dumped because: kasan: bad access detected [ 41.278294] [ 41.278518] Memory state around the buggy address: [ 41.279116] ffff88801960c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 41.279990] ffff88801960c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 41.280877] >ffff88801960c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 41.281750] ^ [ 41.282194] ffff88801960c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.283074] ffff88801960c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 41.283941] ================================================================== [ 41.284945] Disabling lock debugging due to kernel taint [ 43.175774] BUG: Bad rss-counter state mm:00000000eead0efc type:MM_FILEPAGES val:33 [ 43.176725] BUG: Bad rss-counter state mm:00000000eead0efc type:MM_ANONPAGES val:22 [ 43.663541] BUG: Bad rss-counter state mm:00000000cd4369e6 type:MM_FILEPAGES val:33 [ 43.665080] BUG: Bad rss-counter state mm:00000000cd4369e6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32043' (ECDSA) to the list of known hosts. 2023/06/19 18:17:28 fuzzer started 2023/06/19 18:17:28 dialing manager at localhost:44161 2023/06/19 18:17:28 checking machine... 2023/06/19 18:17:28 checking revisions... [ 44.523581] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:17:28 testing simple program... [ 44.569946] cgroup: Unknown subsys name 'net' [ 44.630733] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:17:26 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff110028f413d RSI=ffffffff813909ea RDI=ffff8880147a09e8 RBP=ffffffff8450c042 RSP=ffff88800d9bff18 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88800d9bff58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81534566 RFL=00000002 [-------] 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 00007f1d4fd71900 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=00007f1d4f191c38 CR3=000000000f44c000 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=fdea82750144d3a000000000000ae988 XMM05=6515523d45d382000000000000135230 XMM06=dfcdbad4f1609c370000000000133d58 XMM07=fb795ef6d65770560000000000124540 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff85d3bed0 RBX=0000000000000001 RCX=ffffffff8153425b RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8452fffc RSP=ffff88806cf09da8 R8 =0000000000000000 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=00000000000b6996 R12=0000000000000287 R13=ffff88800e27b3d8 R14=ffffffff818d9dc6 R15=ffff88800d932280 RIP=ffffffff8180eeb2 RFL=00000002 [-------] 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 00007f5165d95900 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=00007f5165d5f008 CR3=000000000e914000 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