syzkaller login: [ 61.293945] BUG: Bad rss-counter state mm:00000000b5096fae type:MM_FILEPAGES val:33 [ 61.295190] BUG: Bad rss-counter state mm:00000000b5096fae type:MM_ANONPAGES val:22 [ 61.334399] ================================================================== [ 61.335462] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.336543] Read of size 8 at addr ffff888015999140 by task sshd/220 [ 61.337488] [ 61.337736] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.338751] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.339978] Call Trace: [ 61.340308] [ 61.340688] dump_stack_lvl+0x91/0xf0 [ 61.341222] print_report+0xcc/0x620 [ 61.341833] ? __virt_addr_valid+0x102/0x340 [ 61.342481] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.343108] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.343771] kasan_report+0xbe/0xf0 [ 61.344253] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.344892] vma_interval_tree_remove+0xc75/0xec0 [ 61.345523] vma_prepare+0xc54/0x11a0 [ 61.346011] __split_vma+0x5af/0x950 [ 61.346515] ? __pfx___split_vma+0x10/0x10 [ 61.347047] ? find_held_lock+0x2c/0x110 [ 61.347602] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.348166] ? lock_is_held_type+0x9f/0x120 [ 61.348723] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.349324] ? mtree_range_walk+0x632/0x900 [ 61.349887] ? mas_walk+0x5c7/0x7c0 [ 61.350383] do_vmi_munmap+0x1f1/0x2b0 [ 61.350880] mmap_region+0x1f9/0x2660 [ 61.351372] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.351907] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.352633] ? __pfx_lock_acquire+0x10/0x10 [ 61.353163] ? __pfx_mmap_region+0x10/0x10 [ 61.353706] ? security_mmap_addr+0x7d/0xa0 [ 61.354238] ? get_unmapped_area+0x1f5/0x3f0 [ 61.354821] do_mmap+0x854/0xf00 [ 61.355259] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.355779] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.356347] ksys_mmap_pgoff+0x3af/0x500 [ 61.356878] do_syscall_64+0x3f/0x90 [ 61.357366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.358024] RIP: 0033:0x7ffafff8cd82 [ 61.358522] 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 [ 61.360676] RSP: 002b:00007fff31afc438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.361627] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffafff8cd82 [ 61.362530] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffaff3c6000 [ 61.363418] RBP: 00007ffaff3c6000 R08: 0000000000000009 R09: 0000000000001000 [ 61.364316] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b69ac2d90 [ 61.365211] R13: 00007fff31afc450 R14: 00007fff31afc480 R15: 00007fff31afc7e0 [ 61.366115] [ 61.366448] [ 61.366679] Allocated by task 213: [ 61.367120] kasan_save_stack+0x22/0x50 [ 61.367644] kasan_set_track+0x25/0x30 [ 61.368148] __kasan_slab_alloc+0x59/0x70 [ 61.368675] kmem_cache_alloc+0x16b/0x370 [ 61.369199] vm_area_dup+0x20/0x160 [ 61.369657] __split_vma+0x170/0x950 [ 61.370153] split_vma+0xc6/0x110 [ 61.370638] mprotect_fixup+0x8d2/0xb30 [ 61.371176] do_mprotect_pkey+0x87e/0xd40 [ 61.371730] __x64_sys_mprotect+0x78/0xc0 [ 61.372284] do_syscall_64+0x3f/0x90 [ 61.372789] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.373483] [ 61.373706] Freed by task 213: [ 61.374128] kasan_save_stack+0x22/0x50 [ 61.374670] kasan_set_track+0x25/0x30 [ 61.375186] kasan_save_free_info+0x2b/0x50 [ 61.375748] __kasan_slab_free+0x10a/0x190 [ 61.376313] kmem_cache_free+0x10d/0x4d0 [ 61.376859] rcu_core+0x8c8/0x2860 [ 61.377327] __do_softirq+0x1b7/0x7d4 [ 61.377825] [ 61.378054] Last potentially related work creation: [ 61.378748] kasan_save_stack+0x22/0x50 [ 61.379280] __kasan_record_aux_stack+0x8e/0xa0 [ 61.379884] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.380567] remove_vma+0x139/0x170 [ 61.381037] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.381633] do_vmi_munmap+0x1f1/0x2b0 [ 61.382145] __vm_munmap+0x138/0x3a0 [ 61.382665] __x64_sys_munmap+0x59/0x80 [ 61.383191] do_syscall_64+0x3f/0x90 [ 61.383696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.384370] [ 61.384596] The buggy address belongs to the object at ffff8880159990e8 [ 61.384596] which belongs to the cache vm_area_struct of size 168 [ 61.386153] The buggy address is located 88 bytes inside of [ 61.386153] freed 168-byte region [ffff8880159990e8, ffff888015999190) [ 61.387669] [ 61.387894] The buggy address belongs to the physical page: [ 61.388597] page:00000000854af530 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15999 [ 61.389771] memcg:ffff88800dcd4d01 [ 61.390230] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.390940] page_type: 0xffffffff() [ 61.391423] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.392407] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcd4d01 [ 61.393385] page dumped because: kasan: bad access detected [ 61.394072] [ 61.394306] Memory state around the buggy address: [ 61.394942] ffff888015999000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.395850] ffff888015999080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 61.396769] >ffff888015999100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.397694] ^ [ 61.398389] ffff888015999180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 61.399308] ffff888015999200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 61.400220] ================================================================== [ 61.401222] Disabling lock debugging due to kernel taint [ 63.605465] BUG: Bad rss-counter state mm:00000000fa7bf6ce type:MM_FILEPAGES val:33 [ 63.607084] BUG: Bad rss-counter state mm:00000000fa7bf6ce type:MM_ANONPAGES val:22 [ 64.066448] BUG: Bad rss-counter state mm:0000000045e070c1 type:MM_FILEPAGES val:33 [ 64.067187] BUG: Bad rss-counter state mm:0000000045e070c1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22194' (ECDSA) to the list of known hosts. 2023/06/20 11:53:54 fuzzer started 2023/06/20 11:53:54 dialing manager at localhost:36067 2023/06/20 11:53:54 checking machine... 2023/06/20 11:53:54 checking revisions... [ 64.702135] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:53:54 testing simple program... [ 64.735636] cgroup: Unknown subsys name 'net' [ 64.768679] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:53:54 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff8880163bfcc0 RCX=0000000000000000 RDX=1ffff11002c77f9e RSI=ffffffff81404ec6 RDI=ffff8880163bfcc0 RBP=0000000000000000 RSP=ffff8880163bfbb8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000000 R13=ffff8880163bfcf0 R14=0000000000000000 R15=0000000000000000 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 00007f4fea3eb700 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=00007f04580426f0 CR3=0000000015a66000 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=00000000000000000000000000000000 XMM01=34e401c888488f84c24b29f2479be71c XMM02=2c67c8bc2e329bc3000000000011a8e0 XMM03=fb795ef6d65770560000000000121e58 XMM04=450010684684969000000000000ae988 XMM05=19e9129bd510f2350000000000131cc8 XMM06=e030ea09d35e69310000000000130b30 XMM07=e042d86d42eb936e00000000001220d8 XMM08=1bf31f22f0e60b56000000000011a940 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007fce096b60b0 CR3=0000000015a66000 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=33353a3131203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323837 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000