syzkaller login: [ 31.172041] BUG: Bad rss-counter state mm:0000000050e841ad type:MM_FILEPAGES val:33 [ 31.173037] BUG: Bad rss-counter state mm:0000000050e841ad type:MM_ANONPAGES val:22 [ 31.344124] ================================================================== [ 31.345194] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.346384] Read of size 8 at addr ffff88800dc3d228 by task sshd/221 [ 31.347338] [ 31.347593] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.348600] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.349768] Call Trace: [ 31.350109] [ 31.350391] dump_stack_lvl+0x91/0xf0 [ 31.350880] print_report+0xcc/0x620 [ 31.351363] ? __virt_addr_valid+0x102/0x340 [ 31.351911] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.352521] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.353130] kasan_report+0xbe/0xf0 [ 31.353611] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.354227] vma_interval_tree_remove+0xc75/0xec0 [ 31.354826] vma_prepare+0xc54/0x11a0 [ 31.355310] __split_vma+0x5af/0x950 [ 31.355786] ? __pfx___split_vma+0x10/0x10 [ 31.356320] ? find_held_lock+0x2c/0x110 [ 31.356839] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.357400] ? lock_is_held_type+0x9f/0x120 [ 31.357961] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.358570] ? mtree_range_walk+0x632/0x900 [ 31.359124] ? mas_walk+0x5c7/0x7c0 [ 31.359599] do_vmi_munmap+0x1f1/0x2b0 [ 31.360098] mmap_region+0x1f9/0x2660 [ 31.360577] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.361093] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.361815] ? __pfx_lock_acquire+0x10/0x10 [ 31.362348] ? __pfx_mmap_region+0x10/0x10 [ 31.362881] ? security_mmap_addr+0x7d/0xa0 [ 31.363414] ? get_unmapped_area+0x1f5/0x3f0 [ 31.363974] do_mmap+0x854/0xf00 [ 31.364412] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.364905] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.365471] ksys_mmap_pgoff+0x3af/0x500 [ 31.365977] do_syscall_64+0x3f/0x90 [ 31.366458] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.367110] RIP: 0033:0x7f6ec806fd82 [ 31.367568] 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 [ 31.369724] RSP: 002b:00007fff466001e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.370634] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6ec806fd82 [ 31.371486] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6ec74a9000 [ 31.372339] RBP: 00007f6ec74a9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.373186] R10: 0000000000000812 R11: 0000000000000206 R12: 00005604d14ecec0 [ 31.374046] R13: 00007fff46600200 R14: 00007fff46600230 R15: 00007fff46600590 [ 31.374907] [ 31.375199] [ 31.375414] Allocated by task 214: [ 31.375838] kasan_save_stack+0x22/0x50 [ 31.376337] kasan_set_track+0x25/0x30 [ 31.376831] __kasan_slab_alloc+0x59/0x70 [ 31.377355] kmem_cache_alloc+0x16b/0x370 [ 31.377879] vm_area_dup+0x20/0x160 [ 31.378332] __split_vma+0x170/0x950 [ 31.378796] split_vma+0xc6/0x110 [ 31.379237] mprotect_fixup+0x8d2/0xb30 [ 31.379738] do_mprotect_pkey+0x87e/0xd40 [ 31.380258] __x64_sys_mprotect+0x78/0xc0 [ 31.380778] do_syscall_64+0x3f/0x90 [ 31.381252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.381905] [ 31.382125] Freed by task 204: [ 31.382511] kasan_save_stack+0x22/0x50 [ 31.383010] kasan_set_track+0x25/0x30 [ 31.383514] kasan_save_free_info+0x2b/0x50 [ 31.384043] __kasan_slab_free+0x10a/0x190 [ 31.384577] kmem_cache_free+0x10d/0x4d0 [ 31.385078] rcu_core+0x8c8/0x2860 [ 31.385526] __do_softirq+0x1b7/0x7d4 [ 31.386005] [ 31.386224] Last potentially related work creation: [ 31.386808] kasan_save_stack+0x22/0x50 [ 31.387378] __kasan_record_aux_stack+0x8e/0xa0 [ 31.387948] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.388589] remove_vma+0x139/0x170 [ 31.389039] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.389613] do_vmi_munmap+0x1f1/0x2b0 [ 31.390096] __vm_munmap+0x138/0x3a0 [ 31.390557] __x64_sys_munmap+0x59/0x80 [ 31.391046] do_syscall_64+0x3f/0x90 [ 31.391520] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.392170] [ 31.392386] The buggy address belongs to the object at ffff88800dc3d1d0 [ 31.392386] which belongs to the cache vm_area_struct of size 168 [ 31.393867] The buggy address is located 88 bytes inside of [ 31.393867] freed 168-byte region [ffff88800dc3d1d0, ffff88800dc3d278) [ 31.395276] [ 31.395493] The buggy address belongs to the physical page: [ 31.396153] page:000000002e674ca0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc3d [ 31.397227] memcg:ffff88800e0b6701 [ 31.397668] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.398371] page_type: 0xffffffff() [ 31.398826] raw: 0100000000000200 ffff8880087a0c80 ffffea0000250e80 dead000000000005 [ 31.399749] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0b6701 [ 31.400647] page dumped because: kasan: bad access detected [ 31.401307] [ 31.401540] Memory state around the buggy address: [ 31.402129] ffff88800dc3d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.402992] ffff88800dc3d180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.403854] >ffff88800dc3d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.404705] ^ [ 31.405263] ffff88800dc3d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.406139] ffff88800dc3d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.407002] ================================================================== [ 31.407922] Disabling lock debugging due to kernel taint [ 33.632573] BUG: Bad rss-counter state mm:00000000d4f71d36 type:MM_FILEPAGES val:33 [ 33.633351] BUG: Bad rss-counter state mm:00000000d4f71d36 type:MM_ANONPAGES val:22 [ 34.178095] BUG: Bad rss-counter state mm:00000000e262c5bb type:MM_FILEPAGES val:33 [ 34.179433] BUG: Bad rss-counter state mm:00000000e262c5bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10500' (ECDSA) to the list of known hosts. 2023/06/20 12:52:34 fuzzer started 2023/06/20 12:52:34 dialing manager at localhost:36067 2023/06/20 12:52:34 checking machine... 2023/06/20 12:52:34 checking revisions... [ 34.926642] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:52:34 testing simple program... [ 34.982620] cgroup: Unknown subsys name 'net' [ 35.025967] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:52:34 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=ffffffff857f9d88 RCX=0000000000000000 RDX=0000000000000003 RSI=ffffffff8219d648 RDI=0000000000000006 RBP=ffff88801a01f688 RSP=ffff88801a01f5e0 R8 =0000000000000006 R9 =0000000000000004 R10=0000000000000004 R11=0000000000000000 R12=0000000000000000 R13=000000000000007c R14=0000000000000000 R15=ffff88801a01f688 RIP=ffffffff814c086b 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 00007fb7d169a700 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=00007fb8530060b0 CR3=00000000159f0000 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=2033333a32353a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a32353a3231203032 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fd4577363a0 CR3=00000000139d8000 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=2ae3a2e82bffea89ad4e2d6402a0dd4b XMM02=000000000011a908ec2efd57dc4c00df XMM03=0000000000121e80c61181086dd3a554 XMM04=c4b8bed16b9f6b5400000000000ae988 XMM05=e4cb8bb95a7664b60000000000131cf0 XMM06=5ce86eb01480437d0000000000130b58 XMM07=e042d86d42eb936e0000000000122100 XMM08=c61181086dd3a554000000000011a968 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000