syzkaller login: [ 35.119710] BUG: Bad rss-counter state mm:00000000d58f3789 type:MM_FILEPAGES val:33 [ 35.121125] BUG: Bad rss-counter state mm:00000000d58f3789 type:MM_ANONPAGES val:22 [ 35.267595] ================================================================== [ 35.268527] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.269472] Read of size 8 at addr ffff88800e0b9b38 by task sshd/219 [ 35.270380] [ 35.270600] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.271471] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.272477] Call Trace: [ 35.272804] [ 35.273105] dump_stack_lvl+0x91/0xf0 [ 35.273600] print_report+0xcc/0x620 [ 35.274138] ? __virt_addr_valid+0x102/0x340 [ 35.274693] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.275327] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.275951] kasan_report+0xbe/0xf0 [ 35.276447] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.277083] vma_interval_tree_remove+0xc75/0xec0 [ 35.277695] vma_prepare+0xc54/0x11a0 [ 35.278223] __split_vma+0x5af/0x950 [ 35.278705] ? __pfx___split_vma+0x10/0x10 [ 35.279255] ? find_held_lock+0x2c/0x110 [ 35.279783] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.280376] ? lock_is_held_type+0x9f/0x120 [ 35.280927] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.281557] ? mtree_range_walk+0x632/0x900 [ 35.282153] ? mas_walk+0x5c7/0x7c0 [ 35.282642] do_vmi_munmap+0x1f1/0x2b0 [ 35.283173] mmap_region+0x1f9/0x2660 [ 35.283669] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.284206] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.284934] ? __pfx_lock_acquire+0x10/0x10 [ 35.285485] ? __pfx_mmap_region+0x10/0x10 [ 35.286039] ? security_mmap_addr+0x7d/0xa0 [ 35.286588] ? get_unmapped_area+0x1f5/0x3f0 [ 35.287169] do_mmap+0x854/0xf00 [ 35.287622] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.288134] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.288703] ksys_mmap_pgoff+0x3af/0x500 [ 35.289234] do_syscall_64+0x3f/0x90 [ 35.289715] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.290417] RIP: 0033:0x7f658d81ed82 [ 35.290879] 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 [ 35.293069] RSP: 002b:00007fff93bbb7b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.294008] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f658d81ed82 [ 35.294877] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f658cc58000 [ 35.295762] RBP: 00007f658cc58000 R08: 0000000000000009 R09: 0000000000001000 [ 35.296623] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564405c68ec0 [ 35.297710] R13: 00007fff93bbb7d0 R14: 00007fff93bbb800 R15: 00007fff93bbbb60 [ 35.298865] [ 35.299254] [ 35.299541] Allocated by task 212: [ 35.300100] kasan_save_stack+0x22/0x50 [ 35.300617] kasan_set_track+0x25/0x30 [ 35.301157] __kasan_slab_alloc+0x59/0x70 [ 35.301713] kmem_cache_alloc+0x16b/0x370 [ 35.302258] vm_area_dup+0x20/0x160 [ 35.302721] __split_vma+0x170/0x950 [ 35.303236] split_vma+0xc6/0x110 [ 35.303679] mprotect_fixup+0x8d2/0xb30 [ 35.304250] do_mprotect_pkey+0x87e/0xd40 [ 35.304816] __x64_sys_mprotect+0x78/0xc0 [ 35.305366] do_syscall_64+0x3f/0x90 [ 35.305850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.306540] [ 35.306762] Freed by task 212: [ 35.307157] kasan_save_stack+0x22/0x50 [ 35.307665] kasan_set_track+0x25/0x30 [ 35.308172] kasan_save_free_info+0x2b/0x50 [ 35.308706] __kasan_slab_free+0x10a/0x190 [ 35.309241] kmem_cache_free+0x10d/0x4d0 [ 35.309768] rcu_core+0x8c8/0x2860 [ 35.310231] __do_softirq+0x1b7/0x7d4 [ 35.310725] [ 35.310942] Last potentially related work creation: [ 35.311543] kasan_save_stack+0x22/0x50 [ 35.312058] __kasan_record_aux_stack+0x8e/0xa0 [ 35.312637] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.313293] remove_vma+0x139/0x170 [ 35.313759] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.314333] do_vmi_munmap+0x1f1/0x2b0 [ 35.314830] __vm_munmap+0x138/0x3a0 [ 35.315303] __x64_sys_munmap+0x59/0x80 [ 35.315814] do_syscall_64+0x3f/0x90 [ 35.316298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.316987] [ 35.317210] The buggy address belongs to the object at ffff88800e0b9ae0 [ 35.317210] which belongs to the cache vm_area_struct of size 168 [ 35.318729] The buggy address is located 88 bytes inside of [ 35.318729] freed 168-byte region [ffff88800e0b9ae0, ffff88800e0b9b88) [ 35.320152] [ 35.320369] The buggy address belongs to the physical page: [ 35.321035] page:000000008ecf749c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0b9 [ 35.322134] memcg:ffff8880169da901 [ 35.322562] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.323205] page_type: 0xffffffff() [ 35.323664] raw: 0100000000000200 ffff8880087a0c80 ffffea000039ef80 dead000000000004 [ 35.324600] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169da901 [ 35.325514] page dumped because: kasan: bad access detected [ 35.326189] [ 35.326410] Memory state around the buggy address: [ 35.326990] ffff88800e0b9a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.327861] ffff88800e0b9a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 35.328726] >ffff88800e0b9b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.329580] ^ [ 35.330214] ffff88800e0b9b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 35.331081] ffff88800e0b9c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 35.331945] ================================================================== [ 35.332952] Disabling lock debugging due to kernel taint [ 37.380861] BUG: Bad rss-counter state mm:000000006805dd95 type:MM_FILEPAGES val:33 [ 37.382385] BUG: Bad rss-counter state mm:000000006805dd95 type:MM_ANONPAGES val:22 [ 37.944669] BUG: Bad rss-counter state mm:00000000575f9dbe type:MM_FILEPAGES val:33 [ 37.945855] BUG: Bad rss-counter state mm:00000000575f9dbe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56040' (ECDSA) to the list of known hosts. 2023/06/20 13:47:40 fuzzer started 2023/06/20 13:47:40 dialing manager at localhost:36067 2023/06/20 13:47:40 checking machine... 2023/06/20 13:47:40 checking revisions... [ 38.594033] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:47:40 testing simple program... [ 38.650598] cgroup: Unknown subsys name 'net' [ 38.694450] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:47:39 Registers: info registers vcpu 0 RAX=000000000000000e RBX=0000000000000001 RCX=ffffffff8180c6a1 RDX=000000000000000e RSI=ffffffff86138e62 RDI=ffffffff85dfe000 RBP=ffff88800fbbfa08 RSP=ffff88800fbbf928 R8 =ffffffff86138e62 R9 =ffff88800fbbf9f0 R10=0000000000038001 R11=0000000000020d8f R12=ffff88800fbbfa10 R13=ffff88800fbbf9f8 R14=ffff88800fbbf9f1 R15=ffff88800fbbf9b0 RIP=ffffffff8112fc16 RFL=00000212 [----A--] 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 00007f8b9cc49900 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=00007f8b9d2010b0 CR3=0000000015f52000 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=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=00007f8b9d1fe650 CR3=000000000e606000 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=37343a3331203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343235 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000