syzkaller login: [ 33.171211] BUG: Bad rss-counter state mm:00000000d1babe21 type:MM_FILEPAGES val:33 [ 33.172232] BUG: Bad rss-counter state mm:00000000d1babe21 type:MM_ANONPAGES val:22 [ 33.338782] ================================================================== [ 33.339869] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.340982] Read of size 8 at addr ffff888016604d08 by task sshd/222 [ 33.342102] [ 33.342368] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.343384] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.344622] Call Trace: [ 33.345008] [ 33.345362] dump_stack_lvl+0x91/0xf0 [ 33.345950] print_report+0xcc/0x620 [ 33.346519] ? __virt_addr_valid+0x102/0x340 [ 33.347164] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.347893] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.348640] kasan_report+0xbe/0xf0 [ 33.349231] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.350005] vma_interval_tree_remove+0xc75/0xec0 [ 33.350751] vma_prepare+0xc54/0x11a0 [ 33.351351] __split_vma+0x5af/0x950 [ 33.351911] ? __pfx___split_vma+0x10/0x10 [ 33.352568] ? find_held_lock+0x2c/0x110 [ 33.353210] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.353929] ? lock_is_held_type+0x9f/0x120 [ 33.354526] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.355138] ? mtree_range_walk+0x632/0x900 [ 33.355690] ? mas_walk+0x5c7/0x7c0 [ 33.356174] do_vmi_munmap+0x1f1/0x2b0 [ 33.356670] mmap_region+0x1f9/0x2660 [ 33.357154] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.357675] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.358397] ? __pfx_lock_acquire+0x10/0x10 [ 33.358931] ? __pfx_mmap_region+0x10/0x10 [ 33.359464] ? security_mmap_addr+0x7d/0xa0 [ 33.359993] ? get_unmapped_area+0x1f5/0x3f0 [ 33.360546] do_mmap+0x854/0xf00 [ 33.360981] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.361486] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.362040] ksys_mmap_pgoff+0x3af/0x500 [ 33.362546] do_syscall_64+0x3f/0x90 [ 33.363029] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.363671] RIP: 0033:0x7f4b3e89fd82 [ 33.364133] 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 [ 33.366292] RSP: 002b:00007ffe98988ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.367199] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4b3e89fd82 [ 33.368054] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4b3dcd9000 [ 33.368905] RBP: 00007f4b3dcd9000 R08: 0000000000000009 R09: 0000000000001000 [ 33.369751] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561b7c2d8ec0 [ 33.370602] R13: 00007ffe98988d00 R14: 00007ffe98988d30 R15: 00007ffe98989090 [ 33.371460] [ 33.371753] [ 33.371965] Allocated by task 215: [ 33.372394] kasan_save_stack+0x22/0x50 [ 33.372905] kasan_set_track+0x25/0x30 [ 33.373412] __kasan_slab_alloc+0x59/0x70 [ 33.373940] kmem_cache_alloc+0x16b/0x370 [ 33.374456] vm_area_dup+0x20/0x160 [ 33.374914] __split_vma+0x170/0x950 [ 33.375383] split_vma+0xc6/0x110 [ 33.375826] mprotect_fixup+0x8d2/0xb30 [ 33.376324] do_mprotect_pkey+0x87e/0xd40 [ 33.376850] __x64_sys_mprotect+0x78/0xc0 [ 33.377385] do_syscall_64+0x3f/0x90 [ 33.377859] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.378512] [ 33.378729] Freed by task 215: [ 33.379124] kasan_save_stack+0x22/0x50 [ 33.379628] kasan_set_track+0x25/0x30 [ 33.380126] kasan_save_free_info+0x2b/0x50 [ 33.380658] __kasan_slab_free+0x10a/0x190 [ 33.381197] kmem_cache_free+0x10d/0x4d0 [ 33.381714] rcu_core+0x8c8/0x2860 [ 33.382162] __do_softirq+0x1b7/0x7d4 [ 33.382644] [ 33.382860] Last potentially related work creation: [ 33.383444] kasan_save_stack+0x22/0x50 [ 33.383944] __kasan_record_aux_stack+0x8e/0xa0 [ 33.384519] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.385160] remove_vma+0x139/0x170 [ 33.385629] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.386187] do_vmi_munmap+0x1f1/0x2b0 [ 33.386680] __vm_munmap+0x138/0x3a0 [ 33.387152] __x64_sys_munmap+0x59/0x80 [ 33.387644] do_syscall_64+0x3f/0x90 [ 33.388117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.388751] [ 33.388970] The buggy address belongs to the object at ffff888016604cb0 [ 33.388970] which belongs to the cache vm_area_struct of size 168 [ 33.390461] The buggy address is located 88 bytes inside of [ 33.390461] freed 168-byte region [ffff888016604cb0, ffff888016604d58) [ 33.391859] [ 33.392077] The buggy address belongs to the physical page: [ 33.392732] page:000000009640fd57 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16604 [ 33.393839] memcg:ffff88800c594201 [ 33.394268] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.394912] page_type: 0xffffffff() [ 33.395363] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.396280] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c594201 [ 33.397197] page dumped because: kasan: bad access detected [ 33.397862] [ 33.398083] Memory state around the buggy address: [ 33.398669] ffff888016604c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 33.399537] ffff888016604c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.400386] >ffff888016604d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.401239] ^ [ 33.401688] ffff888016604d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.402547] ffff888016604e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.403406] ================================================================== [ 33.404538] Disabling lock debugging due to kernel taint [ 35.279887] BUG: Bad rss-counter state mm:0000000032636a34 type:MM_FILEPAGES val:33 [ 35.280847] BUG: Bad rss-counter state mm:0000000032636a34 type:MM_ANONPAGES val:22 [ 35.775272] BUG: Bad rss-counter state mm:0000000084e72bb0 type:MM_FILEPAGES val:33 [ 35.776258] BUG: Bad rss-counter state mm:0000000084e72bb0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62541' (ECDSA) to the list of known hosts. 2023/06/19 20:06:41 fuzzer started 2023/06/19 20:06:41 dialing manager at localhost:44161 2023/06/19 20:06:41 checking machine... 2023/06/19 20:06:41 checking revisions... [ 36.539604] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:06:41 testing simple program... [ 36.580029] cgroup: Unknown subsys name 'net' [ 36.646747] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:06:38 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffff88806ce09b38 RDX=1ffff1100d9c135e RSI=ffff88806ce09a68 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce099d8 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000006097 R12=ffffed100d9c1355 R13=ffffed100d9c1354 R14=ffff88806ce09ae0 R15=ffff88806ce09a98 RIP=ffffffff8113062c 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 0000000000000000 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=00007f37bbffb050 CR3=000000001465e000 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=13b402a86d85f8a4b74ba9940cc1346b XMM02=ec2efd57dc4c00df000000000011d1a0 XMM03=3a02e9782a4a46de000000000011d270 XMM04=fb3c447552b75e2800000000000ae988 XMM05=59d5b690e0af863b0000000000134638 XMM06=eaa8c8ed8bb3787b00000000001334a0 XMM07=e042d86d42eb936e0000000000124d38 XMM08=3a02e9782a4a46de000000000011d270 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c950e1 RBX=0000000000000001 RCX=ffffffff864a870a RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff888016a770b8 RBP=ffff888016a770a8 RSP=ffff888016a76fe0 R8 =ffffffff864a870e R9 =ffff888016a77090 R10=0000000000038001 R11=00000000000b3b35 R12=ffff888016a770b0 R13=ffff888016a77098 R14=ffff888016a774b0 R15=ffff888016a77050 RIP=ffffffff81131118 RFL=00000217 [----APC] 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 00007f747d6e2900 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=00007f747d6c1020 CR3=000000000cbea000 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