syzkaller login: [ 61.376768] BUG: Bad rss-counter state mm:00000000129b0f07 type:MM_FILEPAGES val:33 [ 61.377420] BUG: Bad rss-counter state mm:00000000129b0f07 type:MM_ANONPAGES val:22 [ 61.538165] ================================================================== [ 61.539543] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.540800] Read of size 8 at addr ffff88800de61968 by task sshd/222 [ 61.541876] [ 61.542156] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 61.543300] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.544594] Call Trace: [ 61.545008] [ 61.545378] dump_stack_lvl+0x91/0xf0 [ 61.546000] print_report+0xcc/0x620 [ 61.546617] ? __virt_addr_valid+0x102/0x340 [ 61.547370] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.548182] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.548984] kasan_report+0xbe/0xf0 [ 61.549602] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.550418] vma_interval_tree_remove+0xc75/0xec0 [ 61.551227] vma_prepare+0xc54/0x11a0 [ 61.551849] __split_vma+0x5af/0x950 [ 61.552463] ? __pfx___split_vma+0x10/0x10 [ 61.553153] ? find_held_lock+0x2c/0x110 [ 61.553822] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.554569] ? lock_is_held_type+0x9f/0x120 [ 61.555276] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.556056] ? mtree_range_walk+0x632/0x900 [ 61.556766] ? mas_walk+0x5c7/0x7c0 [ 61.557382] do_vmi_munmap+0x1f1/0x2b0 [ 61.558016] mmap_region+0x1f9/0x2660 [ 61.558662] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.559338] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.560274] ? __pfx_lock_acquire+0x10/0x10 [ 61.560973] ? __pfx_mmap_region+0x10/0x10 [ 61.561655] ? security_mmap_addr+0x7d/0xa0 [ 61.562346] ? get_unmapped_area+0x1f5/0x3f0 [ 61.563070] do_mmap+0x854/0xf00 [ 61.563579] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.564079] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.564655] ksys_mmap_pgoff+0x3af/0x500 [ 61.565169] do_syscall_64+0x3f/0x90 [ 61.565653] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.566304] RIP: 0033:0x7f2170477d82 [ 61.566792] 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 [ 61.568910] RSP: 002b:00007ffdcd95a408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.569816] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2170477d82 [ 61.570669] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f216f8b1000 [ 61.571518] RBP: 00007f216f8b1000 R08: 0000000000000009 R09: 0000000000001000 [ 61.572373] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d0dfe67ec0 [ 61.573221] R13: 00007ffdcd95a420 R14: 00007ffdcd95a450 R15: 00007ffdcd95a7b0 [ 61.574084] [ 61.574380] [ 61.574598] Allocated by task 215: [ 61.575044] kasan_save_stack+0x22/0x50 [ 61.575558] kasan_set_track+0x25/0x30 [ 61.576051] __kasan_slab_alloc+0x59/0x70 [ 61.576577] kmem_cache_alloc+0x16b/0x370 [ 61.577099] vm_area_dup+0x20/0x160 [ 61.577551] __split_vma+0x170/0x950 [ 61.578020] split_vma+0xc6/0x110 [ 61.578462] mprotect_fixup+0x8d2/0xb30 [ 61.579004] do_mprotect_pkey+0x87e/0xd40 [ 61.579531] __x64_sys_mprotect+0x78/0xc0 [ 61.580063] do_syscall_64+0x3f/0x90 [ 61.580540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.581190] [ 61.581416] Freed by task 211: [ 61.581814] kasan_save_stack+0x22/0x50 [ 61.582326] kasan_set_track+0x25/0x30 [ 61.582835] kasan_save_free_info+0x2b/0x50 [ 61.583367] __kasan_slab_free+0x10a/0x190 [ 61.583914] kmem_cache_free+0x10d/0x4d0 [ 61.584429] rcu_core+0x8c8/0x2860 [ 61.584883] __do_softirq+0x1b7/0x7d4 [ 61.585370] [ 61.585599] Last potentially related work creation: [ 61.586181] kasan_save_stack+0x22/0x50 [ 61.586708] __kasan_record_aux_stack+0x8e/0xa0 [ 61.587291] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.587953] remove_vma+0x139/0x170 [ 61.588442] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.589009] do_vmi_munmap+0x1f1/0x2b0 [ 61.589501] __vm_munmap+0x138/0x3a0 [ 61.589980] __x64_sys_munmap+0x59/0x80 [ 61.590485] do_syscall_64+0x3f/0x90 [ 61.590968] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.591613] [ 61.591831] The buggy address belongs to the object at ffff88800de61910 [ 61.591831] which belongs to the cache vm_area_struct of size 168 [ 61.593291] The buggy address is located 88 bytes inside of [ 61.593291] freed 168-byte region [ffff88800de61910, ffff88800de619b8) [ 61.594698] [ 61.594922] The buggy address belongs to the physical page: [ 61.595586] page:00000000fadefd14 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde61 [ 61.596675] memcg:ffff88800eaa1501 [ 61.597103] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.597748] page_type: 0xffffffff() [ 61.598201] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 61.599152] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eaa1501 [ 61.600063] page dumped because: kasan: bad access detected [ 61.600724] [ 61.600940] Memory state around the buggy address: [ 61.601528] ffff88800de61800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 61.602396] ffff88800de61880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 61.603271] >ffff88800de61900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.604120] ^ [ 61.604903] ffff88800de61980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 61.605758] ffff88800de61a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.606604] ================================================================== [ 61.607764] Disabling lock debugging due to kernel taint [ 64.599517] BUG: Bad rss-counter state mm:000000002ee897aa type:MM_FILEPAGES val:33 [ 64.600716] BUG: Bad rss-counter state mm:000000002ee897aa type:MM_ANONPAGES val:22 [ 65.142959] BUG: Bad rss-counter state mm:00000000fa164015 type:MM_FILEPAGES val:33 [ 65.144159] BUG: Bad rss-counter state mm:00000000fa164015 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54676' (ECDSA) to the list of known hosts. 2023/06/20 08:00:23 fuzzer started 2023/06/20 08:00:23 dialing manager at localhost:44161 2023/06/20 08:00:23 checking machine... 2023/06/20 08:00:23 checking revisions... [ 65.765217] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:00:23 testing simple program... [ 65.818172] cgroup: Unknown subsys name 'net' [ 65.857672] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:00:22 Registers: info registers vcpu 0 RAX=ffff88801465cec0 RBX=ffff88806ce09ee8 RCX=1ffff110028cb9d8 RDX=ffff88800dff2a00 RSI=0000000000000008 RDI=ffff88806ce09ef8 RBP=000000000000000d RSP=ffff88806ce09e50 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88806ce09ee8 R14=ffffffff8542a6c0 R15=ffff88801465cd90 RIP=ffffffff8137fc89 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=00007fcc57afd548 CR3=0000000009766000 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=2033323a30303a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a30303a3830203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff817411a7 RDX=ffff88800e61b680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888015b42500 RSP=ffff88800fdcfe18 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000001 R11=00000000000b6996 R12=0000000000000001 R13=ffff888015b42630 R14=0000000000004010 R15=ffff88800fdcfe50 RIP=ffffffff814c07e0 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 00007f32c248f900 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=00007f32c2459008 CR3=000000000f206000 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