syzkaller login: [ 30.128919] BUG: Bad rss-counter state mm:00000000b0fdf4bc type:MM_FILEPAGES val:33 [ 30.130037] BUG: Bad rss-counter state mm:00000000b0fdf4bc type:MM_ANONPAGES val:22 [ 30.291191] ================================================================== [ 30.292109] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.293056] Read of size 8 at addr ffff8880094723f8 by task sshd/219 [ 30.293830] [ 30.294049] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.295000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.296044] Call Trace: [ 30.296363] [ 30.296649] dump_stack_lvl+0x91/0xf0 [ 30.297141] print_report+0xcc/0x620 [ 30.297629] ? __virt_addr_valid+0x102/0x340 [ 30.298192] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.298805] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.299429] kasan_report+0xbe/0xf0 [ 30.299900] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.300522] vma_interval_tree_remove+0xc75/0xec0 [ 30.301118] vma_prepare+0xc54/0x11a0 [ 30.301607] __split_vma+0x5af/0x950 [ 30.302075] ? __pfx___split_vma+0x10/0x10 [ 30.302603] ? find_held_lock+0x2c/0x110 [ 30.303118] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.303697] ? lock_is_held_type+0x9f/0x120 [ 30.304236] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.304838] ? mtree_range_walk+0x632/0x900 [ 30.305385] ? mas_walk+0x5c7/0x7c0 [ 30.305857] do_vmi_munmap+0x1f1/0x2b0 [ 30.306346] mmap_region+0x1f9/0x2660 [ 30.306826] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.307360] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.308081] ? __pfx_lock_acquire+0x10/0x10 [ 30.308619] ? __pfx_mmap_region+0x10/0x10 [ 30.309148] ? security_mmap_addr+0x7d/0xa0 [ 30.309677] ? get_unmapped_area+0x1f5/0x3f0 [ 30.310219] do_mmap+0x854/0xf00 [ 30.310662] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.311155] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.311724] ksys_mmap_pgoff+0x3af/0x500 [ 30.312235] do_syscall_64+0x3f/0x90 [ 30.312719] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.313385] RIP: 0033:0x7f81d572fd82 [ 30.313837] 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 [ 30.315990] RSP: 002b:00007fffb06b9df8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.316898] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f81d572fd82 [ 30.317750] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f81d4b69000 [ 30.318606] RBP: 00007f81d4b69000 R08: 0000000000000009 R09: 0000000000001000 [ 30.319473] R10: 0000000000000812 R11: 0000000000000206 R12: 00005578a67f7980 [ 30.320346] R13: 00007fffb06b9e10 R14: 00007fffb06b9e40 R15: 00007fffb06ba1a0 [ 30.321240] [ 30.321542] [ 30.321762] Allocated by task 212: [ 30.322192] kasan_save_stack+0x22/0x50 [ 30.322698] kasan_set_track+0x25/0x30 [ 30.323201] __kasan_slab_alloc+0x59/0x70 [ 30.323748] kmem_cache_alloc+0x16b/0x370 [ 30.324268] vm_area_dup+0x20/0x160 [ 30.324727] __split_vma+0x170/0x950 [ 30.325196] split_vma+0xc6/0x110 [ 30.325637] mprotect_fixup+0x8d2/0xb30 [ 30.326145] do_mprotect_pkey+0x87e/0xd40 [ 30.326666] __x64_sys_mprotect+0x78/0xc0 [ 30.327190] do_syscall_64+0x3f/0x90 [ 30.327676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.328327] [ 30.328544] Freed by task 212: [ 30.328935] kasan_save_stack+0x22/0x50 [ 30.329439] kasan_set_track+0x25/0x30 [ 30.329934] kasan_save_free_info+0x2b/0x50 [ 30.330471] __kasan_slab_free+0x10a/0x190 [ 30.331005] kmem_cache_free+0x10d/0x4d0 [ 30.331526] rcu_core+0x8c8/0x2860 [ 30.331966] __do_softirq+0x1b7/0x7d4 [ 30.332446] [ 30.332662] Last potentially related work creation: [ 30.333248] kasan_save_stack+0x22/0x50 [ 30.333751] __kasan_record_aux_stack+0x8e/0xa0 [ 30.334327] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.334969] remove_vma+0x139/0x170 [ 30.335445] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.336007] do_vmi_munmap+0x1f1/0x2b0 [ 30.336495] __vm_munmap+0x138/0x3a0 [ 30.336961] __x64_sys_munmap+0x59/0x80 [ 30.337457] do_syscall_64+0x3f/0x90 [ 30.337933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.338578] [ 30.338794] The buggy address belongs to the object at ffff8880094723a0 [ 30.338794] which belongs to the cache vm_area_struct of size 168 [ 30.340282] The buggy address is located 88 bytes inside of [ 30.340282] freed 168-byte region [ffff8880094723a0, ffff888009472448) [ 30.341684] [ 30.341903] The buggy address belongs to the physical page: [ 30.342577] page:000000000544bc50 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9472 [ 30.343692] memcg:ffff888019f2ec01 [ 30.344124] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.344778] page_type: 0xffffffff() [ 30.345228] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.346154] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f2ec01 [ 30.347076] page dumped because: kasan: bad access detected [ 30.347755] [ 30.347973] Memory state around the buggy address: [ 30.348561] ffff888009472280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.349426] ffff888009472300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.350277] >ffff888009472380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.351132] ^ [ 30.351986] ffff888009472400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.352853] ffff888009472480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.353712] ================================================================== [ 30.354676] Disabling lock debugging due to kernel taint [ 32.230148] BUG: Bad rss-counter state mm:00000000396eebcc type:MM_FILEPAGES val:33 [ 32.231311] BUG: Bad rss-counter state mm:00000000396eebcc type:MM_ANONPAGES val:22 [ 32.686021] BUG: Bad rss-counter state mm:0000000054d985f1 type:MM_FILEPAGES val:33 [ 32.687248] BUG: Bad rss-counter state mm:0000000054d985f1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10744' (ECDSA) to the list of known hosts. 2023/06/21 04:13:49 fuzzer started 2023/06/21 04:13:49 dialing manager at localhost:36067 2023/06/21 04:13:49 checking machine... 2023/06/21 04:13:49 checking revisions... [ 33.389871] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:13:49 testing simple program... [ 33.440600] cgroup: Unknown subsys name 'net' [ 33.498209] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:13:49 Registers: info registers vcpu 0 RAX=1ffff11001284d8f RBX=ffff888009426c48 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888009426c78 RBP=ffff888018df2468 RSP=ffff88806ce09db8 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=00000000000b6d53 R12=dffffc0000000000 R13=ffff888018ddc540 R14=ffffffff818d9c06 R15=ffff88800c5e0400 RIP=ffffffff818464e2 RFL=00000046 [---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 00007f1663ccb900 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=00007f16631e9000 CR3=000000000c754000 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=00000000000aea285ec5c49dda130c18 XMM01=00000000000aec68d3fdd5f48436fbd7 XMM02=00000000000f78688cdec34d38af4c0a XMM03=00000000000f7d28693bd129e125714a XMM04=5ec5c49dda130c1800000000000ae988 XMM05=dfcdbad4f1609c370000000000131ac0 XMM06=d4b7b0e221a5b4810000000000130928 XMM07=e042d86d42eb936e0000000000121f58 XMM08=57c31b3ee69ae5ff000000000011d598 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=0000000000000001 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=0000556ca5b7a3c8 CR3=000000000e876000 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=2038343a33313a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a33313a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000