syzkaller login: [ 30.494178] BUG: Bad rss-counter state mm:000000007b6e97ad type:MM_FILEPAGES val:33 [ 30.495247] BUG: Bad rss-counter state mm:000000007b6e97ad type:MM_ANONPAGES val:22 [ 30.647231] ================================================================== [ 30.648232] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.649257] Read of size 8 at addr ffff88800e02f140 by task sshd/219 [ 30.650188] [ 30.650422] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.651351] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.652405] Call Trace: [ 30.652750] [ 30.653060] dump_stack_lvl+0x91/0xf0 [ 30.653603] print_report+0xcc/0x620 [ 30.654122] ? __virt_addr_valid+0x102/0x340 [ 30.654717] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.655380] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.656046] kasan_report+0xbe/0xf0 [ 30.656567] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.657249] vma_interval_tree_remove+0xc75/0xec0 [ 30.657928] vma_prepare+0xc54/0x11a0 [ 30.658466] __split_vma+0x5af/0x950 [ 30.658990] ? __pfx___split_vma+0x10/0x10 [ 30.659575] ? find_held_lock+0x2c/0x110 [ 30.660154] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.660771] ? lock_is_held_type+0x9f/0x120 [ 30.661372] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.662063] ? mtree_range_walk+0x632/0x900 [ 30.662671] ? mas_walk+0x5c7/0x7c0 [ 30.663198] do_vmi_munmap+0x1f1/0x2b0 [ 30.663742] mmap_region+0x1f9/0x2660 [ 30.664269] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.664813] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.665583] ? __pfx_lock_acquire+0x10/0x10 [ 30.666171] ? __pfx_mmap_region+0x10/0x10 [ 30.666746] ? security_mmap_addr+0x7d/0xa0 [ 30.667309] ? get_unmapped_area+0x1f5/0x3f0 [ 30.667902] do_mmap+0x854/0xf00 [ 30.668382] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.668912] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.669520] ksys_mmap_pgoff+0x3af/0x500 [ 30.670081] do_syscall_64+0x3f/0x90 [ 30.670601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.671297] RIP: 0033:0x7feb9f7edd82 [ 30.671792] 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 [ 30.674094] RSP: 002b:00007ffc127ca7e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.675096] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feb9f7edd82 [ 30.676031] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feb9ec27000 [ 30.676959] RBP: 00007feb9ec27000 R08: 0000000000000009 R09: 0000000000001000 [ 30.677908] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c6423b2ec0 [ 30.678844] R13: 00007ffc127ca800 R14: 00007ffc127ca830 R15: 00007ffc127cab90 [ 30.679796] [ 30.680119] [ 30.680354] Allocated by task 212: [ 30.680826] kasan_save_stack+0x22/0x50 [ 30.681380] kasan_set_track+0x25/0x30 [ 30.681936] __kasan_slab_alloc+0x59/0x70 [ 30.682513] kmem_cache_alloc+0x16b/0x370 [ 30.683083] vm_area_dup+0x20/0x160 [ 30.683581] __split_vma+0x170/0x950 [ 30.684097] split_vma+0xc6/0x110 [ 30.684586] mprotect_fixup+0x8d2/0xb30 [ 30.685137] do_mprotect_pkey+0x87e/0xd40 [ 30.685730] __x64_sys_mprotect+0x78/0xc0 [ 30.686303] do_syscall_64+0x3f/0x90 [ 30.686820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.687518] [ 30.687749] Freed by task 19: [ 30.688171] kasan_save_stack+0x22/0x50 [ 30.688719] kasan_set_track+0x25/0x30 [ 30.689265] kasan_save_free_info+0x2b/0x50 [ 30.689859] __kasan_slab_free+0x10a/0x190 [ 30.690449] kmem_cache_free+0x10d/0x4d0 [ 30.691004] rcu_core+0x8c8/0x2860 [ 30.691494] __do_softirq+0x1b7/0x7d4 [ 30.692018] [ 30.692256] Last potentially related work creation: [ 30.692896] kasan_save_stack+0x22/0x50 [ 30.693451] __kasan_record_aux_stack+0x8e/0xa0 [ 30.694095] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.694804] remove_vma+0x139/0x170 [ 30.695298] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.695909] do_vmi_munmap+0x1f1/0x2b0 [ 30.696448] __vm_munmap+0x138/0x3a0 [ 30.696965] __x64_sys_munmap+0x59/0x80 [ 30.697511] do_syscall_64+0x3f/0x90 [ 30.698038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.698759] [ 30.698995] Second to last potentially related work creation: [ 30.699754] kasan_save_stack+0x22/0x50 [ 30.700312] __kasan_record_aux_stack+0x8e/0xa0 [ 30.700946] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.701672] remove_vma+0x139/0x170 [ 30.702176] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.702793] do_vmi_munmap+0x1f1/0x2b0 [ 30.703331] __vm_munmap+0x138/0x3a0 [ 30.703848] elf_map+0x26f/0x310 [ 30.704341] load_elf_binary+0x3417/0x5030 [ 30.704931] bprm_execve+0x803/0x1940 [ 30.705452] do_execveat_common+0x734/0x8e0 [ 30.706055] __x64_sys_execve+0x93/0xc0 [ 30.706603] do_syscall_64+0x3f/0x90 [ 30.707129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.707834] [ 30.708072] The buggy address belongs to the object at ffff88800e02f0e8 [ 30.708072] which belongs to the cache vm_area_struct of size 168 [ 30.709716] The buggy address is located 88 bytes inside of [ 30.709716] freed 168-byte region [ffff88800e02f0e8, ffff88800e02f190) [ 30.711288] [ 30.711528] The buggy address belongs to the physical page: [ 30.712260] page:000000005d3f3294 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe02f [ 30.713463] memcg:ffff88800e008801 [ 30.713947] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.714725] page_type: 0xffffffff() [ 30.715209] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bfc80 dead000000000005 [ 30.716199] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e008801 [ 30.717180] page dumped because: kasan: bad access detected [ 30.717911] [ 30.718142] Memory state around the buggy address: [ 30.718768] ffff88800e02f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.719715] ffff88800e02f080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.720646] >ffff88800e02f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.721606] ^ [ 30.722322] ffff88800e02f180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 30.723255] ffff88800e02f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.724173] ================================================================== [ 30.725322] Disabling lock debugging due to kernel taint [ 32.337350] BUG: Bad rss-counter state mm:0000000062fa1267 type:MM_FILEPAGES val:33 [ 32.338410] BUG: Bad rss-counter state mm:0000000062fa1267 type:MM_ANONPAGES val:22 [ 32.820367] BUG: Bad rss-counter state mm:0000000079d917c0 type:MM_FILEPAGES val:33 [ 32.821598] BUG: Bad rss-counter state mm:0000000079d917c0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46368' (ECDSA) to the list of known hosts. 2023/06/20 21:10:58 fuzzer started 2023/06/20 21:10:58 dialing manager at localhost:36067 2023/06/20 21:10:58 checking machine... 2023/06/20 21:10:58 checking revisions... [ 33.535286] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:10:59 testing simple program... [ 33.584316] cgroup: Unknown subsys name 'net' [ 33.625426] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:10:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652b60 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff814c8471 RDI=ffffffff8542aab4 RBP=ffffffff86621198 RSP=ffff88806ce09a20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=ffffffff86621198 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff888009c60c60 RIP=ffffffff84538a40 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=00007f454facf508 CR3=000000000cbae000 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=2038353a30313a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a30313a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11003443c13 RBX=ffff88801a21e068 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801a21e098 RBP=ffff88801649d678 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88801649d508 R14=ffffffff813782f8 R15=ffff88801649d508 RIP=ffffffff818464ec RFL=00000046 [---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 00007f476f114900 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=00007f476f0d9008 CR3=00000000168be000 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