syzkaller login: [ 68.189232] BUG: Bad rss-counter state mm:00000000b4cc79d8 type:MM_FILEPAGES val:33 [ 68.190849] BUG: Bad rss-counter state mm:00000000b4cc79d8 type:MM_ANONPAGES val:22 [ 68.347593] ================================================================== [ 68.348510] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.349460] Read of size 8 at addr ffff8880188af4e0 by task sshd/220 [ 68.350222] [ 68.350450] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 68.351685] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.352649] Call Trace: [ 68.352967] [ 68.353250] dump_stack_lvl+0x91/0xf0 [ 68.353741] print_report+0xcc/0x620 [ 68.354219] ? __virt_addr_valid+0x102/0x340 [ 68.354820] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.355452] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.356074] kasan_report+0xbe/0xf0 [ 68.356548] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.357177] vma_interval_tree_remove+0xc75/0xec0 [ 68.357772] vma_prepare+0xc54/0x11a0 [ 68.358265] __split_vma+0x5af/0x950 [ 68.358766] ? __pfx___split_vma+0x10/0x10 [ 68.359303] ? find_held_lock+0x2c/0x110 [ 68.359832] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.360400] ? lock_is_held_type+0x9f/0x120 [ 68.360939] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.361555] ? mtree_range_walk+0x632/0x900 [ 68.362119] ? mas_walk+0x5c7/0x7c0 [ 68.362620] do_vmi_munmap+0x1f1/0x2b0 [ 68.363126] mmap_region+0x1f9/0x2660 [ 68.363615] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.364140] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.364868] ? __pfx_lock_acquire+0x10/0x10 [ 68.365413] ? __pfx_mmap_region+0x10/0x10 [ 68.365943] ? security_mmap_addr+0x7d/0xa0 [ 68.366488] ? get_unmapped_area+0x1f5/0x3f0 [ 68.367042] do_mmap+0x854/0xf00 [ 68.367506] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.368001] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.368572] ksys_mmap_pgoff+0x3af/0x500 [ 68.369080] do_syscall_64+0x3f/0x90 [ 68.369569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.370225] RIP: 0033:0x7f9e509b2d82 [ 68.370709] 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 [ 68.372839] RSP: 002b:00007fff94e3e038 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.373753] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9e509b2d82 [ 68.374624] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9e4fdec000 [ 68.375486] RBP: 00007f9e4fdec000 R08: 0000000000000009 R09: 0000000000001000 [ 68.376367] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563987de2ec0 [ 68.377213] R13: 00007fff94e3e050 R14: 00007fff94e3e080 R15: 00007fff94e3e3e0 [ 68.378092] [ 68.378394] [ 68.378623] Allocated by task 213: [ 68.379062] kasan_save_stack+0x22/0x50 [ 68.379573] kasan_set_track+0x25/0x30 [ 68.380075] __kasan_slab_alloc+0x59/0x70 [ 68.380605] kmem_cache_alloc+0x16b/0x370 [ 68.381126] vm_area_dup+0x20/0x160 [ 68.381584] __split_vma+0x170/0x950 [ 68.382054] split_vma+0xc6/0x110 [ 68.382504] mprotect_fixup+0x8d2/0xb30 [ 68.383019] do_mprotect_pkey+0x87e/0xd40 [ 68.383545] __x64_sys_mprotect+0x78/0xc0 [ 68.384067] do_syscall_64+0x3f/0x90 [ 68.384559] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.385212] [ 68.385429] Freed by task 213: [ 68.385829] kasan_save_stack+0x22/0x50 [ 68.386335] kasan_set_track+0x25/0x30 [ 68.386855] kasan_save_free_info+0x2b/0x50 [ 68.387396] __kasan_slab_free+0x10a/0x190 [ 68.387930] kmem_cache_free+0x10d/0x4d0 [ 68.388446] rcu_core+0x8c8/0x2860 [ 68.388892] __do_softirq+0x1b7/0x7d4 [ 68.389375] [ 68.389596] Last potentially related work creation: [ 68.390196] kasan_save_stack+0x22/0x50 [ 68.390720] __kasan_record_aux_stack+0x8e/0xa0 [ 68.391307] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.391969] remove_vma+0x139/0x170 [ 68.392429] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.393045] do_vmi_munmap+0x1f1/0x2b0 [ 68.393537] __vm_munmap+0x138/0x3a0 [ 68.394007] __x64_sys_munmap+0x59/0x80 [ 68.394532] do_syscall_64+0x3f/0x90 [ 68.395016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.395663] [ 68.395886] Second to last potentially related work creation: [ 68.396569] kasan_save_stack+0x22/0x50 [ 68.397089] __kasan_record_aux_stack+0x8e/0xa0 [ 68.397678] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.398345] remove_vma+0x139/0x170 [ 68.398821] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.399375] do_vmi_munmap+0x1f1/0x2b0 [ 68.399868] mmap_region+0x1f9/0x2660 [ 68.400346] do_mmap+0x854/0xf00 [ 68.400793] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.401286] ksys_mmap_pgoff+0x3af/0x500 [ 68.401799] do_syscall_64+0x3f/0x90 [ 68.402295] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.402939] [ 68.403161] The buggy address belongs to the object at ffff8880188af488 [ 68.403161] which belongs to the cache vm_area_struct of size 168 [ 68.404643] The buggy address is located 88 bytes inside of [ 68.404643] freed 168-byte region [ffff8880188af488, ffff8880188af530) [ 68.406138] [ 68.406358] The buggy address belongs to the physical page: [ 68.407043] page:00000000fb850066 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x188af [ 68.408136] memcg:ffff88801889ca01 [ 68.408561] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 68.409263] page_type: 0xffffffff() [ 68.409722] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 68.410668] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801889ca01 [ 68.411570] page dumped because: kasan: bad access detected [ 68.412227] [ 68.412444] Memory state around the buggy address: [ 68.413018] ffff8880188af380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.413858] ffff8880188af400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 68.414724] >ffff8880188af480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.415569] ^ [ 68.416322] ffff8880188af500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 68.417182] ffff8880188af580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.418036] ================================================================== [ 68.419190] Disabling lock debugging due to kernel taint [ 71.199606] BUG: Bad rss-counter state mm:00000000ad9a05ba type:MM_FILEPAGES val:33 [ 71.201339] BUG: Bad rss-counter state mm:00000000ad9a05ba type:MM_ANONPAGES val:22 [ 71.756182] BUG: Bad rss-counter state mm:000000000f1f2245 type:MM_FILEPAGES val:33 [ 71.757355] BUG: Bad rss-counter state mm:000000000f1f2245 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32709' (ECDSA) to the list of known hosts. 2023/06/20 04:44:35 fuzzer started 2023/06/20 04:44:36 dialing manager at localhost:44161 2023/06/20 04:44:36 checking machine... 2023/06/20 04:44:36 checking revisions... [ 72.451364] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:44:36 testing simple program... [ 72.482787] cgroup: Unknown subsys name 'net' [ 72.516907] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:44:06 Registers: info registers vcpu 0 RAX=0000000000000008 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000006 RSI=ffffffff84d39980 RDI=0000000000000000 RBP=ffffffff84d39980 RSP=ffff8880147b7950 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=ffff88800d5a88c0 R14=ffff8880147b7a88 R15=ffff888015fb8780 RIP=ffffffff814c03f6 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 00007fe48f066700 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=00007f1180cb60b0 CR3=0000000016c8a000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3133325b646873732035333a3434 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363131 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fc3766c36b0 CR3=000000000d8a8000 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=37056ce592e9d49a7f44ec8c0e44c08d XMM02=0000000000121250eff9b2d0a8fce9cb XMM03=00000000001213202c67c8bc2e329bc3 XMM04=8521b7b134baee2e00000000000ae988 XMM05=59d5b690e0af863b0000000000139ca0 XMM06=00185746aa13a4be00000000001390f0 XMM07=e042d86d42eb936e0000000000128218 XMM08=6098fd3dfd5b31350000000000121320 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000