syzkaller login: [ 61.726950] BUG: Bad rss-counter state mm:00000000d70eec90 type:MM_FILEPAGES val:33 [ 61.728150] BUG: Bad rss-counter state mm:00000000d70eec90 type:MM_ANONPAGES val:22 [ 61.903796] ================================================================== [ 61.904710] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.905658] Read of size 8 at addr ffff888019bfa310 by task sshd/219 [ 61.906543] [ 61.906765] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 61.907784] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.908776] Call Trace: [ 61.909096] [ 61.909384] dump_stack_lvl+0x91/0xf0 [ 61.909876] print_report+0xcc/0x620 [ 61.910363] ? __virt_addr_valid+0x102/0x340 [ 61.910943] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.911554] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.912171] kasan_report+0xbe/0xf0 [ 61.912646] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.913285] vma_interval_tree_remove+0xc75/0xec0 [ 61.913884] vma_prepare+0xc54/0x11a0 [ 61.914362] __split_vma+0x5af/0x950 [ 61.914841] ? __pfx___split_vma+0x10/0x10 [ 61.915368] ? find_held_lock+0x2c/0x110 [ 61.915886] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.916447] ? lock_is_held_type+0x9f/0x120 [ 61.916982] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.917588] ? mtree_range_walk+0x632/0x900 [ 61.918134] ? mas_walk+0x5c7/0x7c0 [ 61.918613] do_vmi_munmap+0x1f1/0x2b0 [ 61.919115] mmap_region+0x1f9/0x2660 [ 61.919595] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.920101] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.920819] ? __pfx_lock_acquire+0x10/0x10 [ 61.921346] ? __pfx_mmap_region+0x10/0x10 [ 61.921885] ? security_mmap_addr+0x7d/0xa0 [ 61.922429] ? get_unmapped_area+0x1f5/0x3f0 [ 61.922973] do_mmap+0x854/0xf00 [ 61.923410] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.923905] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.924463] ksys_mmap_pgoff+0x3af/0x500 [ 61.924977] do_syscall_64+0x3f/0x90 [ 61.925457] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.926099] RIP: 0033:0x7f334524bd82 [ 61.926568] 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 [ 61.928671] RSP: 002b:00007fff018c2948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.929575] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f334524bd82 [ 61.930442] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3344685000 [ 61.931301] RBP: 00007f3344685000 R08: 0000000000000009 R09: 0000000000001000 [ 61.932136] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560be25a2b20 [ 61.932987] R13: 00007fff018c2960 R14: 00007fff018c2990 R15: 00007fff018c2cf0 [ 61.933834] [ 61.934128] [ 61.934345] Allocated by task 212: [ 61.934784] kasan_save_stack+0x22/0x50 [ 61.935287] kasan_set_track+0x25/0x30 [ 61.935775] __kasan_slab_alloc+0x59/0x70 [ 61.936296] kmem_cache_alloc+0x16b/0x370 [ 61.936813] vm_area_dup+0x20/0x160 [ 61.937265] __split_vma+0x170/0x950 [ 61.937741] split_vma+0xc6/0x110 [ 61.938182] mprotect_fixup+0x8d2/0xb30 [ 61.938700] do_mprotect_pkey+0x87e/0xd40 [ 61.939218] __x64_sys_mprotect+0x78/0xc0 [ 61.939737] do_syscall_64+0x3f/0x90 [ 61.940214] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.940864] [ 61.941080] Freed by task 13: [ 61.941466] kasan_save_stack+0x22/0x50 [ 61.941970] kasan_set_track+0x25/0x30 [ 61.942490] kasan_save_free_info+0x2b/0x50 [ 61.943021] __kasan_slab_free+0x10a/0x190 [ 61.943557] kmem_cache_free+0x10d/0x4d0 [ 61.944076] rcu_core+0x8c8/0x2860 [ 61.944526] __do_softirq+0x1b7/0x7d4 [ 61.945006] [ 61.945218] Last potentially related work creation: [ 61.945802] kasan_save_stack+0x22/0x50 [ 61.946317] __kasan_record_aux_stack+0x8e/0xa0 [ 61.946904] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.947547] remove_vma+0x139/0x170 [ 61.947998] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.948556] do_vmi_munmap+0x1f1/0x2b0 [ 61.949046] __vm_munmap+0x138/0x3a0 [ 61.949507] __x64_sys_munmap+0x59/0x80 [ 61.949999] do_syscall_64+0x3f/0x90 [ 61.950485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.951128] [ 61.951345] The buggy address belongs to the object at ffff888019bfa2b8 [ 61.951345] which belongs to the cache vm_area_struct of size 168 [ 61.952812] The buggy address is located 88 bytes inside of [ 61.952812] freed 168-byte region [ffff888019bfa2b8, ffff888019bfa360) [ 61.954210] [ 61.954432] The buggy address belongs to the physical page: [ 61.955093] page:00000000125d7699 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19bfa [ 61.956169] memcg:ffff888019bfb001 [ 61.956597] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.957234] page_type: 0xffffffff() [ 61.957681] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 61.958606] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019bfb001 [ 61.959502] page dumped because: kasan: bad access detected [ 61.960161] [ 61.960375] Memory state around the buggy address: [ 61.960950] ffff888019bfa200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 61.961800] ffff888019bfa280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 61.962673] >ffff888019bfa300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 61.963519] ^ [ 61.963986] ffff888019bfa380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 61.964844] ffff888019bfa400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 61.965695] ================================================================== [ 61.966673] Disabling lock debugging due to kernel taint [ 63.815333] BUG: Bad rss-counter state mm:00000000bb35ecd8 type:MM_FILEPAGES val:33 [ 63.815922] BUG: Bad rss-counter state mm:00000000bb35ecd8 type:MM_ANONPAGES val:22 [ 64.352195] BUG: Bad rss-counter state mm:000000007b4585fc type:MM_FILEPAGES val:33 [ 64.353256] BUG: Bad rss-counter state mm:000000007b4585fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6178' (ECDSA) to the list of known hosts. 2023/06/20 00:24:30 fuzzer started 2023/06/20 00:24:30 dialing manager at localhost:44161 2023/06/20 00:24:30 checking machine... 2023/06/20 00:24:30 checking revisions... [ 65.040383] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:24:30 testing simple program... [ 65.084134] cgroup: Unknown subsys name 'net' [ 65.118347] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:24:00 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86096756 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888008d7f9d0 RSP=ffff888008d7f8b8 R8 =ffffffff8609675a R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000006097 R12=ffff888008d7f9d8 R13=ffff888008d7f9c0 R14=ffff888008d7f978 R15=ffff888008d7f978 RIP=ffffffff81131153 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=00007ff22534c690 CR3=0000000019a8e000 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=2030333a34323a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a34323a3030203032 XMM08=3d656e696c646d632022656369767265 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=00007ffcfa657000 CR3=000000001a516000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000