syzkaller login: [ 35.769326] BUG: Bad rss-counter state mm:0000000039e53b53 type:MM_FILEPAGES val:33 [ 35.770211] BUG: Bad rss-counter state mm:0000000039e53b53 type:MM_ANONPAGES val:22 [ 35.881636] ================================================================== [ 35.882354] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.883034] Read of size 8 at addr ffff888019d74880 by task sshd/220 [ 35.883542] [ 35.883686] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.884275] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.885015] Call Trace: [ 35.885251] [ 35.885455] dump_stack_lvl+0x91/0xf0 [ 35.885981] print_report+0xcc/0x620 [ 35.886337] ? __virt_addr_valid+0x102/0x340 [ 35.886742] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.887168] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.887576] kasan_report+0xbe/0xf0 [ 35.887889] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.888332] vma_interval_tree_remove+0xc75/0xec0 [ 35.888799] vma_prepare+0xc54/0x11a0 [ 35.889143] __split_vma+0x5af/0x950 [ 35.889473] ? __pfx___split_vma+0x10/0x10 [ 35.889861] ? find_held_lock+0x2c/0x110 [ 35.890235] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.890589] ? lock_is_held_type+0x9f/0x120 [ 35.890953] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.891373] ? mtree_range_walk+0x632/0x900 [ 35.891745] ? mas_walk+0x5c7/0x7c0 [ 35.892078] do_vmi_munmap+0x1f1/0x2b0 [ 35.892463] mmap_region+0x1f9/0x2660 [ 35.892791] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.893164] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.893622] ? __pfx_lock_acquire+0x10/0x10 [ 35.893978] ? __pfx_mmap_region+0x10/0x10 [ 35.894368] ? security_mmap_addr+0x7d/0xa0 [ 35.894708] ? get_unmapped_area+0x1f5/0x3f0 [ 35.895069] do_mmap+0x854/0xf00 [ 35.895376] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.895721] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.896144] ksys_mmap_pgoff+0x3af/0x500 [ 35.896503] do_syscall_64+0x3f/0x90 [ 35.896820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.897302] RIP: 0033:0x7f879e989d82 [ 35.897613] 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 [ 35.899061] RSP: 002b:00007ffd20675a68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.899652] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f879e989d82 [ 35.900193] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f879ddc3000 [ 35.900802] RBP: 00007f879ddc3000 R08: 0000000000000009 R09: 0000000000001000 [ 35.901380] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563da74a9ec0 [ 35.901931] R13: 00007ffd20675a80 R14: 00007ffd20675ab0 R15: 00007ffd20675e10 [ 35.902512] [ 35.902695] [ 35.902829] Allocated by task 213: [ 35.903110] kasan_save_stack+0x22/0x50 [ 35.903484] kasan_set_track+0x25/0x30 [ 35.903807] __kasan_slab_alloc+0x59/0x70 [ 35.904167] kmem_cache_alloc+0x16b/0x370 [ 35.904558] vm_area_dup+0x20/0x160 [ 35.904865] __split_vma+0x170/0x950 [ 35.905174] split_vma+0xc6/0x110 [ 35.905470] mprotect_fixup+0x8d2/0xb30 [ 35.905803] do_mprotect_pkey+0x87e/0xd40 [ 35.906179] __x64_sys_mprotect+0x78/0xc0 [ 35.906528] do_syscall_64+0x3f/0x90 [ 35.906847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.907306] [ 35.907450] Freed by task 213: [ 35.907718] kasan_save_stack+0x22/0x50 [ 35.908066] kasan_set_track+0x25/0x30 [ 35.908415] kasan_save_free_info+0x2b/0x50 [ 35.908771] __kasan_slab_free+0x10a/0x190 [ 35.909199] kmem_cache_free+0x10d/0x4d0 [ 35.909556] rcu_core+0x8c8/0x2860 [ 35.909861] __do_softirq+0x1b7/0x7d4 [ 35.910225] [ 35.910399] Last potentially related work creation: [ 35.910855] kasan_save_stack+0x22/0x50 [ 35.911212] __kasan_record_aux_stack+0x8e/0xa0 [ 35.911602] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.912029] remove_vma+0x139/0x170 [ 35.912348] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.912777] do_vmi_munmap+0x1f1/0x2b0 [ 35.913144] __vm_munmap+0x138/0x3a0 [ 35.913513] __x64_sys_munmap+0x59/0x80 [ 35.913849] do_syscall_64+0x3f/0x90 [ 35.914182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.914625] [ 35.914776] The buggy address belongs to the object at ffff888019d74828 [ 35.914776] which belongs to the cache vm_area_struct of size 168 [ 35.915837] The buggy address is located 88 bytes inside of [ 35.915837] freed 168-byte region [ffff888019d74828, ffff888019d748d0) [ 35.916904] [ 35.917050] The buggy address belongs to the physical page: [ 35.917514] page:000000003691494f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d74 [ 35.918283] memcg:ffff88800f311201 [ 35.918589] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.919043] page_type: 0xffffffff() [ 35.919363] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.919992] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f311201 [ 35.920637] page dumped because: kasan: bad access detected [ 35.921105] [ 35.921259] Memory state around the buggy address: [ 35.921674] ffff888019d74780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 35.922277] ffff888019d74800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.922883] >ffff888019d74880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.923486] ^ [ 35.923777] ffff888019d74900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.924423] ffff888019d74980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 35.925023] ================================================================== [ 35.925746] Disabling lock debugging due to kernel taint [ 37.330106] BUG: Bad rss-counter state mm:00000000bd3bfed9 type:MM_FILEPAGES val:33 [ 37.330903] BUG: Bad rss-counter state mm:00000000bd3bfed9 type:MM_ANONPAGES val:22 [ 37.725320] BUG: Bad rss-counter state mm:00000000f0047fca type:MM_FILEPAGES val:33 [ 37.726035] BUG: Bad rss-counter state mm:00000000f0047fca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27228' (ECDSA) to the list of known hosts. 2023/06/20 08:55:41 fuzzer started 2023/06/20 08:55:42 dialing manager at localhost:44161 2023/06/20 08:55:42 checking machine... 2023/06/20 08:55:42 checking revisions... [ 38.294521] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:55:42 testing simple program... [ 38.332562] cgroup: Unknown subsys name 'net' [ 38.376287] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:55:37 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fd0d175e000 CR3=000000000c41e000 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=31806bd0b56daf88c641a24be6560ecd XMM02=2c67c8bc2e329bc3000000000011d2c0 XMM03=fb795ef6d65770560000000000123fc8 XMM04=24844f1d406201e200000000000ae988 XMM05=19e9129bd510f2350000000000133aa8 XMM06=cf4207a769a966760000000000132910 XMM07=e042d86d42eb936e0000000000124248 XMM08=e91fce823e39cb40000000000011d320 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800daf28b8 RBX=dffffc0000000000 RCX=0000000000000000 RDX=1ffff11001b5e517 RSI=ffff88800dc6b2c8 RDI=ffff88800dc6b660 RBP=ffff88800dc6b3f8 RSP=ffff88801a0179b8 R8 =0000000000000001 R9 =ffffed1003402f2f R10=0000000000000003 R11=00000000000b6996 R12=ffff88800dc6b658 R13=fffffbfff0f70df0 R14=ffff88800dc6b528 R15=ffffffff87b86f80 RIP=ffffffff844cc4cf 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3281201900 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=00007f32811c6008 CR3=0000000019d6e000 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=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