syzkaller login: [ 37.315956] BUG: Bad rss-counter state mm:000000005f45fa61 type:MM_FILEPAGES val:33 [ 37.317140] BUG: Bad rss-counter state mm:000000005f45fa61 type:MM_ANONPAGES val:22 [ 37.358067] ================================================================== [ 37.359118] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.360210] Read of size 8 at addr ffff888008f3c880 by task sshd/220 [ 37.361075] [ 37.361327] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.362305] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.363439] Call Trace: [ 37.363800] [ 37.364121] dump_stack_lvl+0x91/0xf0 [ 37.364673] print_report+0xcc/0x620 [ 37.365220] ? __virt_addr_valid+0x102/0x340 [ 37.365851] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.366568] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.367273] kasan_report+0xbe/0xf0 [ 37.367831] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.368548] vma_interval_tree_remove+0xc75/0xec0 [ 37.369256] vma_prepare+0xc54/0x11a0 [ 37.369812] __split_vma+0x5af/0x950 [ 37.370353] ? __pfx___split_vma+0x10/0x10 [ 37.370979] ? find_held_lock+0x2c/0x110 [ 37.371589] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.372252] ? lock_is_held_type+0x9f/0x120 [ 37.372881] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.373587] ? mtree_range_walk+0x632/0x900 [ 37.374228] ? mas_walk+0x5c7/0x7c0 [ 37.374807] do_vmi_munmap+0x1f1/0x2b0 [ 37.375384] mmap_region+0x1f9/0x2660 [ 37.375951] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.376554] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.377387] ? __pfx_lock_acquire+0x10/0x10 [ 37.378013] ? __pfx_mmap_region+0x10/0x10 [ 37.378647] ? security_mmap_addr+0x7d/0xa0 [ 37.379269] ? get_unmapped_area+0x1f5/0x3f0 [ 37.379903] do_mmap+0x854/0xf00 [ 37.380413] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.380986] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.381631] ksys_mmap_pgoff+0x3af/0x500 [ 37.382219] do_syscall_64+0x3f/0x90 [ 37.382782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.383537] RIP: 0033:0x7f1a07536d82 [ 37.384065] 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 [ 37.386541] RSP: 002b:00007ffe24b6ad88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.387595] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1a07536d82 [ 37.388582] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1a06970000 [ 37.389566] RBP: 00007f1a06970000 R08: 0000000000000009 R09: 0000000000001000 [ 37.390556] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c1e646ad90 [ 37.391543] R13: 00007ffe24b6ada0 R14: 00007ffe24b6add0 R15: 00007ffe24b6b130 [ 37.392544] [ 37.392883] [ 37.393138] Allocated by task 213: [ 37.393638] kasan_save_stack+0x22/0x50 [ 37.394221] kasan_set_track+0x25/0x30 [ 37.394804] __kasan_slab_alloc+0x59/0x70 [ 37.395418] kmem_cache_alloc+0x16b/0x370 [ 37.396043] vm_area_dup+0x20/0x160 [ 37.396570] __split_vma+0x170/0x950 [ 37.397111] split_vma+0xc6/0x110 [ 37.397625] mprotect_fixup+0x8d2/0xb30 [ 37.398205] do_mprotect_pkey+0x87e/0xd40 [ 37.398832] __x64_sys_mprotect+0x78/0xc0 [ 37.399434] do_syscall_64+0x3f/0x90 [ 37.399985] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.400735] [ 37.400987] Freed by task 213: [ 37.401451] kasan_save_stack+0x22/0x50 [ 37.402044] kasan_set_track+0x25/0x30 [ 37.402632] kasan_save_free_info+0x2b/0x50 [ 37.403254] __kasan_slab_free+0x10a/0x190 [ 37.403885] kmem_cache_free+0x10d/0x4d0 [ 37.404484] rcu_core+0x8c8/0x2860 [ 37.405017] __do_softirq+0x1b7/0x7d4 [ 37.405573] [ 37.405825] Last potentially related work creation: [ 37.406522] kasan_save_stack+0x22/0x50 [ 37.407116] __kasan_record_aux_stack+0x8e/0xa0 [ 37.407803] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.408574] remove_vma+0x139/0x170 [ 37.409113] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.409773] do_vmi_munmap+0x1f1/0x2b0 [ 37.410353] __vm_munmap+0x138/0x3a0 [ 37.410920] __x64_sys_munmap+0x59/0x80 [ 37.411514] do_syscall_64+0x3f/0x90 [ 37.412077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.412838] [ 37.413092] The buggy address belongs to the object at ffff888008f3c828 [ 37.413092] which belongs to the cache vm_area_struct of size 168 [ 37.414863] The buggy address is located 88 bytes inside of [ 37.414863] freed 168-byte region [ffff888008f3c828, ffff888008f3c8d0) [ 37.416555] [ 37.416817] The buggy address belongs to the physical page: [ 37.417607] page:00000000319f0338 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8f3c [ 37.418925] memcg:ffff88800b8c6601 [ 37.419438] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.420215] page_type: 0xffffffff() [ 37.420659] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.421569] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b8c6601 [ 37.422459] page dumped because: kasan: bad access detected [ 37.423122] [ 37.423336] Memory state around the buggy address: [ 37.423905] ffff888008f3c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 37.424748] ffff888008f3c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 37.425589] >ffff888008f3c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 37.426433] ^ [ 37.426848] ffff888008f3c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.427698] ffff888008f3c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 37.428536] ================================================================== [ 37.429882] Disabling lock debugging due to kernel taint [ 39.464711] BUG: Bad rss-counter state mm:000000004ef45d2c type:MM_FILEPAGES val:33 [ 39.465627] BUG: Bad rss-counter state mm:000000004ef45d2c type:MM_ANONPAGES val:22 [ 39.941717] BUG: Bad rss-counter state mm:000000005d99a448 type:MM_FILEPAGES val:33 [ 39.943063] BUG: Bad rss-counter state mm:000000005d99a448 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15772' (ECDSA) to the list of known hosts. 2023/06/20 03:04:56 fuzzer started 2023/06/20 03:04:56 dialing manager at localhost:44161 2023/06/20 03:04:56 checking machine... 2023/06/20 03:04:56 checking revisions... [ 40.700490] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:04:56 testing simple program... [ 40.758382] cgroup: Unknown subsys name 'net' [ 40.795407] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:04:48 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110018b7e9c RSI=ffff88800c5bf468 RDI=ffff88800c5bf4e8 RBP=ffff88800c5bf530 RSP=ffff88800c5bf3d8 R8 =0000000000000001 R9 =ffff88800c5bf4d8 R10=0000000000038001 R11=0000000000006097 R12=ffff88800c5bf4f8 R13=ffff88800c5bf4e0 R14=ffff88800c5bf468 R15=ffff88800c5bf498 RIP=ffffffff81131c60 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 00007f67ee58f900 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=00007ffec1c25000 CR3=0000000010058000 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=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 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=00007fa984ae93d0 CR3=0000000018e2c000 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=2035353a34303a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a34303a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000