syzkaller login: [ 30.690460] BUG: Bad rss-counter state mm:000000007e4ecbac type:MM_FILEPAGES val:33 [ 30.691410] BUG: Bad rss-counter state mm:000000007e4ecbac type:MM_ANONPAGES val:22 [ 30.808235] ================================================================== [ 30.808895] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.809553] Read of size 8 at addr ffff88800f402b38 by task sshd/220 [ 30.810088] [ 30.810245] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.810851] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.811528] Call Trace: [ 30.811752] [ 30.811955] dump_stack_lvl+0x91/0xf0 [ 30.812311] print_report+0xcc/0x620 [ 30.812695] ? __virt_addr_valid+0x102/0x340 [ 30.813084] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.813524] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.813954] kasan_report+0xbe/0xf0 [ 30.814288] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.814718] vma_interval_tree_remove+0xc75/0xec0 [ 30.815145] vma_prepare+0xc54/0x11a0 [ 30.815481] __split_vma+0x5af/0x950 [ 30.815813] ? __pfx___split_vma+0x10/0x10 [ 30.816187] ? find_held_lock+0x2c/0x110 [ 30.816581] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.816979] ? lock_is_held_type+0x9f/0x120 [ 30.817373] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.817799] ? mtree_range_walk+0x632/0x900 [ 30.818185] ? mas_walk+0x5c7/0x7c0 [ 30.818561] do_vmi_munmap+0x1f1/0x2b0 [ 30.818912] mmap_region+0x1f9/0x2660 [ 30.819252] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.819637] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.820135] ? __pfx_lock_acquire+0x10/0x10 [ 30.820509] ? __pfx_mmap_region+0x10/0x10 [ 30.820878] ? security_mmap_addr+0x7d/0xa0 [ 30.821259] ? get_unmapped_area+0x1f5/0x3f0 [ 30.821639] do_mmap+0x854/0xf00 [ 30.821942] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.822293] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.822681] ksys_mmap_pgoff+0x3af/0x500 [ 30.823037] do_syscall_64+0x3f/0x90 [ 30.823385] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.823851] RIP: 0033:0x7fe2286bdd82 [ 30.824181] 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 [ 30.825781] RSP: 002b:00007ffced5ffaa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.826422] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe2286bdd82 [ 30.827019] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe227af7000 [ 30.827614] RBP: 00007fe227af7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.828215] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f2e698d90 [ 30.828833] R13: 00007ffced5ffac0 R14: 00007ffced5ffaf0 R15: 00007ffced5ffe50 [ 30.829440] [ 30.829656] [ 30.829812] Allocated by task 213: [ 30.830129] kasan_save_stack+0x22/0x50 [ 30.830492] kasan_set_track+0x25/0x30 [ 30.830840] __kasan_slab_alloc+0x59/0x70 [ 30.831210] kmem_cache_alloc+0x16b/0x370 [ 30.831572] vm_area_dup+0x20/0x160 [ 30.831887] __split_vma+0x170/0x950 [ 30.832221] split_vma+0xc6/0x110 [ 30.832542] mprotect_fixup+0x8d2/0xb30 [ 30.832896] do_mprotect_pkey+0x87e/0xd40 [ 30.833267] __x64_sys_mprotect+0x78/0xc0 [ 30.833633] do_syscall_64+0x3f/0x90 [ 30.833972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.834437] [ 30.834591] Freed by task 213: [ 30.834868] kasan_save_stack+0x22/0x50 [ 30.835228] kasan_set_track+0x25/0x30 [ 30.835577] kasan_save_free_info+0x2b/0x50 [ 30.835952] __kasan_slab_free+0x10a/0x190 [ 30.836332] kmem_cache_free+0x10d/0x4d0 [ 30.836717] rcu_core+0x8c8/0x2860 [ 30.837032] __do_softirq+0x1b7/0x7d4 [ 30.837374] [ 30.837528] Last potentially related work creation: [ 30.837940] kasan_save_stack+0x22/0x50 [ 30.838298] __kasan_record_aux_stack+0x8e/0xa0 [ 30.838715] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.839172] remove_vma+0x139/0x170 [ 30.839526] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.839932] do_vmi_munmap+0x1f1/0x2b0 [ 30.840276] __vm_munmap+0x138/0x3a0 [ 30.840622] __x64_sys_munmap+0x59/0x80 [ 30.840976] do_syscall_64+0x3f/0x90 [ 30.841305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.841907] [ 30.842068] The buggy address belongs to the object at ffff88800f402ae0 [ 30.842068] which belongs to the cache vm_area_struct of size 168 [ 30.843181] The buggy address is located 88 bytes inside of [ 30.843181] freed 168-byte region [ffff88800f402ae0, ffff88800f402b88) [ 30.844218] [ 30.844380] The buggy address belongs to the physical page: [ 30.844888] page:00000000f2e50247 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf402 [ 30.845694] memcg:ffff888015a7ef01 [ 30.846017] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.846501] page_type: 0xffffffff() [ 30.846833] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.847516] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a7ef01 [ 30.848180] page dumped because: kasan: bad access detected [ 30.848688] [ 30.848845] Memory state around the buggy address: [ 30.849275] ffff88800f402a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.849901] ffff88800f402a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.850534] >ffff88800f402b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.851159] ^ [ 30.851632] ffff88800f402b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.852266] ffff88800f402c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.852916] ================================================================== [ 30.853718] Disabling lock debugging due to kernel taint [ 32.900737] BUG: Bad rss-counter state mm:00000000f3b866a0 type:MM_FILEPAGES val:33 [ 32.901484] BUG: Bad rss-counter state mm:00000000f3b866a0 type:MM_ANONPAGES val:22 [ 33.270912] BUG: Bad rss-counter state mm:000000005ba225c5 type:MM_FILEPAGES val:33 [ 33.271673] BUG: Bad rss-counter state mm:000000005ba225c5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46188' (ECDSA) to the list of known hosts. 2023/06/21 09:14:02 fuzzer started 2023/06/21 09:14:02 dialing manager at localhost:36067 2023/06/21 09:14:02 checking machine... 2023/06/21 09:14:02 checking revisions... [ 33.865754] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:14:02 testing simple program... [ 33.901807] cgroup: Unknown subsys name 'net' [ 33.934204] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:14:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86129aae RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff8880158cf6c8 RSP=ffff8880158cf600 R8 =ffffffff86129ab2 R9 =ffff8880158cf6b0 R10=0000000000038001 R11=000000000001e4ed R12=ffff8880158cf6d0 R13=ffff8880158cf6b8 R14=0000000000000005 R15=ffff8880158cf670 RIP=ffffffff81130b1f RFL=00000297 [--S-APC] 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 00007fb04c4a2900 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=00007fb04c481020 CR3=000000000fbde000 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=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=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=00007fb3869f3ac0 CR3=00000000169fe000 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=2032303a34313a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a34313a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000