syzkaller login: [ 32.795068] BUG: Bad rss-counter state mm:000000008ee0a5fd type:MM_FILEPAGES val:33 [ 32.796589] BUG: Bad rss-counter state mm:000000008ee0a5fd type:MM_ANONPAGES val:22 [ 32.931394] ================================================================== [ 32.932550] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.933756] Read of size 8 at addr ffff888015b75880 by task sshd/221 [ 32.934672] [ 32.934908] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.935843] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.936910] Call Trace: [ 32.937260] [ 32.937577] dump_stack_lvl+0x91/0xf0 [ 32.938116] print_report+0xcc/0x620 [ 32.938651] ? __virt_addr_valid+0x102/0x340 [ 32.939268] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.939970] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.940657] kasan_report+0xbe/0xf0 [ 32.941193] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.941885] vma_interval_tree_remove+0xc75/0xec0 [ 32.942552] vma_prepare+0xc54/0x11a0 [ 32.943085] __split_vma+0x5af/0x950 [ 32.943627] ? __pfx___split_vma+0x10/0x10 [ 32.944219] ? find_held_lock+0x2c/0x110 [ 32.944802] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.945424] ? lock_is_held_type+0x9f/0x120 [ 32.946021] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.946697] ? mtree_range_walk+0x632/0x900 [ 32.947311] ? mas_walk+0x5c7/0x7c0 [ 32.947843] do_vmi_munmap+0x1f1/0x2b0 [ 32.948403] mmap_region+0x1f9/0x2660 [ 32.948920] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.949462] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.950225] ? __pfx_lock_acquire+0x10/0x10 [ 32.950792] ? __pfx_mmap_region+0x10/0x10 [ 32.951360] ? security_mmap_addr+0x7d/0xa0 [ 32.951942] ? get_unmapped_area+0x1f5/0x3f0 [ 32.952529] do_mmap+0x854/0xf00 [ 32.952995] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.953523] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.954114] ksys_mmap_pgoff+0x3af/0x500 [ 32.954658] do_syscall_64+0x3f/0x90 [ 32.955170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.955869] RIP: 0033:0x7f026d6c5d82 [ 32.956353] 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 [ 32.958629] RSP: 002b:00007ffe2ba83d38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.959627] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f026d6c5d82 [ 32.960555] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f026caff000 [ 32.961477] RBP: 00007f026caff000 R08: 0000000000000009 R09: 0000000000001000 [ 32.962405] R10: 0000000000000812 R11: 0000000000000206 R12: 00005600f0f18b20 [ 32.963340] R13: 00007ffe2ba83d50 R14: 00007ffe2ba83d80 R15: 00007ffe2ba840e0 [ 32.964324] [ 32.964644] [ 32.964881] Allocated by task 214: [ 32.965339] kasan_save_stack+0x22/0x50 [ 32.965872] kasan_set_track+0x25/0x30 [ 32.966393] __kasan_slab_alloc+0x59/0x70 [ 32.966949] kmem_cache_alloc+0x16b/0x370 [ 32.967503] vm_area_dup+0x20/0x160 [ 32.967993] __split_vma+0x170/0x950 [ 32.968486] split_vma+0xc6/0x110 [ 32.968952] mprotect_fixup+0x8d2/0xb30 [ 32.969485] do_mprotect_pkey+0x87e/0xd40 [ 32.970038] __x64_sys_mprotect+0x78/0xc0 [ 32.970589] do_syscall_64+0x3f/0x90 [ 32.971092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.971781] [ 32.972009] Freed by task 214: [ 32.972427] kasan_save_stack+0x22/0x50 [ 32.972957] kasan_set_track+0x25/0x30 [ 32.973490] kasan_save_free_info+0x2b/0x50 [ 32.974078] __kasan_slab_free+0x10a/0x190 [ 32.974661] kmem_cache_free+0x10d/0x4d0 [ 32.975221] rcu_core+0x8c8/0x2860 [ 32.975728] __do_softirq+0x1b7/0x7d4 [ 32.976250] [ 32.976487] Last potentially related work creation: [ 32.977130] kasan_save_stack+0x22/0x50 [ 32.977690] __kasan_record_aux_stack+0x8e/0xa0 [ 32.978331] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.979041] remove_vma+0x139/0x170 [ 32.979548] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.980162] do_vmi_munmap+0x1f1/0x2b0 [ 32.980702] __vm_munmap+0x138/0x3a0 [ 32.981221] __x64_sys_munmap+0x59/0x80 [ 32.981767] do_syscall_64+0x3f/0x90 [ 32.982286] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.982996] [ 32.983232] The buggy address belongs to the object at ffff888015b75828 [ 32.983232] which belongs to the cache vm_area_struct of size 168 [ 32.984874] The buggy address is located 88 bytes inside of [ 32.984874] freed 168-byte region [ffff888015b75828, ffff888015b758d0) [ 32.986419] [ 32.986656] The buggy address belongs to the physical page: [ 32.987386] page:00000000b89e08bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b75 [ 32.988591] memcg:ffff88800e252001 [ 32.989061] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.989764] page_type: 0xffffffff() [ 32.990260] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.991266] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e252001 [ 32.992293] page dumped because: kasan: bad access detected [ 32.993024] [ 32.993260] Memory state around the buggy address: [ 32.993897] ffff888015b75780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.994835] ffff888015b75800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.995783] >ffff888015b75880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.996740] ^ [ 32.997199] ffff888015b75900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.998145] ffff888015b75980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 32.999055] ================================================================== [ 33.000392] Disabling lock debugging due to kernel taint [ 35.035289] BUG: Bad rss-counter state mm:000000001a9e73f5 type:MM_FILEPAGES val:33 [ 35.036297] BUG: Bad rss-counter state mm:000000001a9e73f5 type:MM_ANONPAGES val:22 [ 35.536923] BUG: Bad rss-counter state mm:00000000c97e1f0e type:MM_FILEPAGES val:33 [ 35.538091] BUG: Bad rss-counter state mm:00000000c97e1f0e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56147' (ECDSA) to the list of known hosts. 2023/06/19 23:14:21 fuzzer started 2023/06/19 23:14:21 dialing manager at localhost:44161 2023/06/19 23:14:21 checking machine... 2023/06/19 23:14:21 checking revisions... [ 36.141926] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:14:21 testing simple program... [ 36.194233] cgroup: Unknown subsys name 'net' [ 36.241802] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:14:19 Registers: info registers vcpu 0 RAX=ffff88800ed126c0 RBX=ffff88800ed12660 RCX=00000000802a0014 RDX=00000000802a0015 RSI=ffff88800ed12660 RDI=ffff88800879f3c0 RBP=ffff8880181ef7f8 RSP=ffff8880181ef760 R8 =00000000802a0014 R9 =0000000000000000 R10=ffffea00003b4480 R11=00000000802a0015 R12=ffffea00003b4480 R13=ffff88800ed126c0 R14=00000000802a0014 R15=ffff88800879f3c0 RIP=ffffffff818095bf RFL=00000242 [---Z---] 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 00007f37bde5e900 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=00007f37be413650 CR3=00000000167ba000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f6715ad7c90 CR3=000000000d8ca000 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=325aa3c2ff6e6b9ebb490a3d248a9db3 XMM02=ec2efd57dc4c00df000000000011e4c8 XMM03=820703f67c8dc698000000000011e598 XMM04=46005080f6fd8e5900000000000ae988 XMM05=4d3d9c3dc4c07d580000000000135c48 XMM06=c291bd5c70af25b90000000000134ce8 XMM07=e042d86d42eb936e0000000000125598 XMM08=820703f67c8dc698000000000011e598 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000