syzkaller login: [ 29.750282] BUG: Bad rss-counter state mm:00000000f252ac7b type:MM_FILEPAGES val:33 [ 29.751729] BUG: Bad rss-counter state mm:00000000f252ac7b type:MM_ANONPAGES val:22 [ 29.893843] ================================================================== [ 29.894761] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.895713] Read of size 8 at addr ffff88800e9ee140 by task sshd/219 [ 29.896485] [ 29.896707] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.897702] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.898691] Call Trace: [ 29.899012] [ 29.899299] dump_stack_lvl+0x91/0xf0 [ 29.899796] print_report+0xcc/0x620 [ 29.900273] ? __virt_addr_valid+0x102/0x340 [ 29.900827] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.901438] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.902066] kasan_report+0xbe/0xf0 [ 29.902542] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.903160] vma_interval_tree_remove+0xc75/0xec0 [ 29.903754] vma_prepare+0xc54/0x11a0 [ 29.904227] __split_vma+0x5af/0x950 [ 29.904705] ? __pfx___split_vma+0x10/0x10 [ 29.905234] ? find_held_lock+0x2c/0x110 [ 29.905749] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.906324] ? lock_is_held_type+0x9f/0x120 [ 29.906863] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.907472] ? mtree_range_walk+0x632/0x900 [ 29.908031] ? mas_walk+0x5c7/0x7c0 [ 29.908496] do_vmi_munmap+0x1f1/0x2b0 [ 29.908993] mmap_region+0x1f9/0x2660 [ 29.909473] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.909992] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.910718] ? __pfx_lock_acquire+0x10/0x10 [ 29.911249] ? __pfx_mmap_region+0x10/0x10 [ 29.911775] ? security_mmap_addr+0x7d/0xa0 [ 29.912301] ? get_unmapped_area+0x1f5/0x3f0 [ 29.912842] do_mmap+0x854/0xf00 [ 29.913278] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.913770] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.914337] ksys_mmap_pgoff+0x3af/0x500 [ 29.914848] do_syscall_64+0x3f/0x90 [ 29.915320] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.915958] RIP: 0033:0x7fb3e9146d82 [ 29.916409] 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 [ 29.918549] RSP: 002b:00007ffe13d60d08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.919446] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb3e9146d82 [ 29.920290] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb3e8580000 [ 29.921132] RBP: 00007fb3e8580000 R08: 0000000000000009 R09: 0000000000001000 [ 29.921980] R10: 0000000000000812 R11: 0000000000000206 R12: 000055725c040ec0 [ 29.922822] R13: 00007ffe13d60d20 R14: 00007ffe13d60d50 R15: 00007ffe13d610b0 [ 29.923701] [ 29.923995] [ 29.924212] Allocated by task 212: [ 29.924643] kasan_save_stack+0x22/0x50 [ 29.925151] kasan_set_track+0x25/0x30 [ 29.925639] __kasan_slab_alloc+0x59/0x70 [ 29.926181] kmem_cache_alloc+0x16b/0x370 [ 29.926687] vm_area_dup+0x20/0x160 [ 29.927136] __split_vma+0x170/0x950 [ 29.927598] split_vma+0xc6/0x110 [ 29.928041] mprotect_fixup+0x8d2/0xb30 [ 29.928545] do_mprotect_pkey+0x87e/0xd40 [ 29.929062] __x64_sys_mprotect+0x78/0xc0 [ 29.929582] do_syscall_64+0x3f/0x90 [ 29.930061] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.930694] [ 29.930907] Freed by task 202: [ 29.931301] kasan_save_stack+0x22/0x50 [ 29.931805] kasan_set_track+0x25/0x30 [ 29.932291] kasan_save_free_info+0x2b/0x50 [ 29.932821] __kasan_slab_free+0x10a/0x190 [ 29.933357] kmem_cache_free+0x10d/0x4d0 [ 29.933862] rcu_core+0x8c8/0x2860 [ 29.934309] __do_softirq+0x1b7/0x7d4 [ 29.934781] [ 29.934998] Last potentially related work creation: [ 29.935586] kasan_save_stack+0x22/0x50 [ 29.936090] __kasan_record_aux_stack+0x8e/0xa0 [ 29.936662] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.937312] remove_vma+0x139/0x170 [ 29.937760] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.938326] do_vmi_munmap+0x1f1/0x2b0 [ 29.938858] __vm_munmap+0x138/0x3a0 [ 29.939321] __x64_sys_munmap+0x59/0x80 [ 29.939819] do_syscall_64+0x3f/0x90 [ 29.940289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.940926] [ 29.941140] The buggy address belongs to the object at ffff88800e9ee0e8 [ 29.941140] which belongs to the cache vm_area_struct of size 168 [ 29.942597] The buggy address is located 88 bytes inside of [ 29.942597] freed 168-byte region [ffff88800e9ee0e8, ffff88800e9ee190) [ 29.943991] [ 29.944205] The buggy address belongs to the physical page: [ 29.944872] page:0000000004c85f66 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9ee [ 29.945945] memcg:ffff88801a31d101 [ 29.946392] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.947038] page_type: 0xffffffff() [ 29.947487] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.948405] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a31d101 [ 29.949312] page dumped because: kasan: bad access detected [ 29.949966] [ 29.950186] Memory state around the buggy address: [ 29.950779] ffff88800e9ee000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.951641] ffff88800e9ee080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 29.952506] >ffff88800e9ee100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.953365] ^ [ 29.954009] ffff88800e9ee180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 29.954877] ffff88800e9ee200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 29.955746] ================================================================== [ 29.956682] Disabling lock debugging due to kernel taint [ 32.237295] BUG: Bad rss-counter state mm:00000000f17e74ff type:MM_FILEPAGES val:33 [ 32.238620] BUG: Bad rss-counter state mm:00000000f17e74ff type:MM_ANONPAGES val:22 [ 32.675607] BUG: Bad rss-counter state mm:000000002e13753a type:MM_FILEPAGES val:33 [ 32.676727] BUG: Bad rss-counter state mm:000000002e13753a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15539' (ECDSA) to the list of known hosts. 2023/06/20 02:24:38 fuzzer started 2023/06/20 02:24:38 dialing manager at localhost:44161 2023/06/20 02:24:38 checking machine... 2023/06/20 02:24:38 checking revisions... [ 33.415817] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:24:38 testing simple program... [ 33.460076] cgroup: Unknown subsys name 'net' [ 33.497990] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:24:37 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffffffff8542a6c0 RCX=0000000000000100 RDX=0000000000000000 RSI=ffffffff814c83e7 RDI=ffffffff8542aab4 RBP=ffffffff8542a6c0 RSP=ffff88806ce09a10 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b5420 R12=ffffffff86605df9 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800e148a00 RIP=ffffffff8135bda9 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=00007f28f4a852f0 CR3=0000000019e16000 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=2038333a34323a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a34323a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffea00006cbe48 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffffd40000c6a89 RSI=ffffffff8170f4bd RDI=ffffea0000635448 RBP=ffff8880167a7d90 RSP=ffff8880167a7c00 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffea0000635440 R13=ffff88800e33b828 R14=ffff8880167a7db8 R15=0000000000000000 RIP=ffffffff8170f4e2 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007facf3557900 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=00007facf40c931c CR3=0000000019d5e000 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=6720646572637465733a4d41503d706f 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