syzkaller login: [ 87.734491] BUG: Bad rss-counter state mm:00000000e717e814 type:MM_FILEPAGES val:33 [ 87.736141] BUG: Bad rss-counter state mm:00000000e717e814 type:MM_ANONPAGES val:22 [ 87.902550] ================================================================== [ 87.903458] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 87.904376] Read of size 8 at addr ffff88800dcb53f8 by task sshd/219 [ 87.905254] [ 87.905471] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 87.906501] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 87.907469] Call Trace: [ 87.907791] [ 87.908076] dump_stack_lvl+0x91/0xf0 [ 87.908558] print_report+0xcc/0x620 [ 87.909077] ? __virt_addr_valid+0x102/0x340 [ 87.909626] ? vma_interval_tree_remove+0xc75/0xec0 [ 87.910242] ? vma_interval_tree_remove+0xc75/0xec0 [ 87.910860] kasan_report+0xbe/0xf0 [ 87.911331] ? vma_interval_tree_remove+0xc75/0xec0 [ 87.911953] vma_interval_tree_remove+0xc75/0xec0 [ 87.912546] vma_prepare+0xc54/0x11a0 [ 87.913027] __split_vma+0x5af/0x950 [ 87.913499] ? __pfx___split_vma+0x10/0x10 [ 87.914022] ? find_held_lock+0x2c/0x110 [ 87.914535] do_vmi_align_munmap+0x2ba/0x11f0 [ 87.915091] ? lock_is_held_type+0x9f/0x120 [ 87.915617] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 87.916225] ? mtree_range_walk+0x632/0x900 [ 87.916775] ? mas_walk+0x5c7/0x7c0 [ 87.917263] do_vmi_munmap+0x1f1/0x2b0 [ 87.917753] mmap_region+0x1f9/0x2660 [ 87.918234] ? vm_mmap_pgoff+0x15c/0x3a0 [ 87.918739] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 87.919445] ? __pfx_lock_acquire+0x10/0x10 [ 87.919990] ? __pfx_mmap_region+0x10/0x10 [ 87.920511] ? security_mmap_addr+0x7d/0xa0 [ 87.921090] ? get_unmapped_area+0x1f5/0x3f0 [ 87.921636] do_mmap+0x854/0xf00 [ 87.922069] vm_mmap_pgoff+0x1a6/0x3a0 [ 87.922561] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 87.923116] ksys_mmap_pgoff+0x3af/0x500 [ 87.923633] do_syscall_64+0x3f/0x90 [ 87.924112] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 87.924764] RIP: 0033:0x7f8bd9894d82 [ 87.925241] 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 [ 87.927354] RSP: 002b:00007ffff673fc88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 87.928253] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8bd9894d82 [ 87.929108] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8bd8cce000 [ 87.929952] RBP: 00007f8bd8cce000 R08: 0000000000000009 R09: 0000000000001000 [ 87.930804] R10: 0000000000000812 R11: 0000000000000206 R12: 00005634fb8c6b20 [ 87.931643] R13: 00007ffff673fca0 R14: 00007ffff673fcd0 R15: 00007ffff6740030 [ 87.932488] [ 87.932777] [ 87.933008] Allocated by task 212: [ 87.933431] kasan_save_stack+0x22/0x50 [ 87.933940] kasan_set_track+0x25/0x30 [ 87.934427] __kasan_slab_alloc+0x59/0x70 [ 87.934946] kmem_cache_alloc+0x16b/0x370 [ 87.935452] vm_area_dup+0x20/0x160 [ 87.935912] __split_vma+0x170/0x950 [ 87.936371] split_vma+0xc6/0x110 [ 87.936809] mprotect_fixup+0x8d2/0xb30 [ 87.937317] do_mprotect_pkey+0x87e/0xd40 [ 87.937834] __x64_sys_mprotect+0x78/0xc0 [ 87.938346] do_syscall_64+0x3f/0x90 [ 87.938824] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 87.939461] [ 87.939676] Freed by task 212: [ 87.940072] kasan_save_stack+0x22/0x50 [ 87.940569] kasan_set_track+0x25/0x30 [ 87.941073] kasan_save_free_info+0x2b/0x50 [ 87.941603] __kasan_slab_free+0x10a/0x190 [ 87.942139] kmem_cache_free+0x10d/0x4d0 [ 87.942643] rcu_core+0x8c8/0x2860 [ 87.943119] __do_softirq+0x1b7/0x7d4 [ 87.943592] [ 87.943805] Last potentially related work creation: [ 87.944384] kasan_save_stack+0x22/0x50 [ 87.944907] __kasan_record_aux_stack+0x8e/0xa0 [ 87.945477] __call_rcu_common.constprop.0+0x6a/0xb90 [ 87.946113] remove_vma+0x139/0x170 [ 87.946561] do_vmi_align_munmap+0xd4a/0x11f0 [ 87.947113] do_vmi_munmap+0x1f1/0x2b0 [ 87.947598] __vm_munmap+0x138/0x3a0 [ 87.948060] __x64_sys_munmap+0x59/0x80 [ 87.948553] do_syscall_64+0x3f/0x90 [ 87.949028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 87.949668] [ 87.949884] The buggy address belongs to the object at ffff88800dcb53a0 [ 87.949884] which belongs to the cache vm_area_struct of size 168 [ 87.951334] The buggy address is located 88 bytes inside of [ 87.951334] freed 168-byte region [ffff88800dcb53a0, ffff88800dcb5448) [ 87.952726] [ 87.952957] The buggy address belongs to the physical page: [ 87.953613] page:0000000033b0b118 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcb5 [ 87.954683] memcg:ffff88800d802801 [ 87.955106] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 87.955798] page_type: 0xffffffff() [ 87.956249] raw: 0100000000000200 ffff88800879fc80 ffffea000036b540 dead000000000007 [ 87.957171] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d802801 [ 87.958067] page dumped because: kasan: bad access detected [ 87.958722] [ 87.958937] Memory state around the buggy address: [ 87.959510] ffff88800dcb5280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 87.960361] ffff88800dcb5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 87.961221] >ffff88800dcb5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 87.962062] ^ [ 87.962900] ffff88800dcb5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 87.963747] ffff88800dcb5480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 87.964590] ================================================================== [ 87.965578] Disabling lock debugging due to kernel taint [ 89.944275] BUG: Bad rss-counter state mm:00000000d9066f65 type:MM_FILEPAGES val:33 [ 89.945395] BUG: Bad rss-counter state mm:00000000d9066f65 type:MM_ANONPAGES val:22 [ 90.413591] BUG: Bad rss-counter state mm:000000006687950b type:MM_FILEPAGES val:33 [ 90.414870] BUG: Bad rss-counter state mm:000000006687950b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39864' (ECDSA) to the list of known hosts. 2023/06/20 03:52:13 fuzzer started 2023/06/20 03:52:13 dialing manager at localhost:44161 2023/06/20 03:52:13 checking machine... 2023/06/20 03:52:13 checking revisions... [ 91.122024] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:52:13 testing simple program... [ 91.162380] cgroup: Unknown subsys name 'net' [ 91.224537] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:51:24 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=1ffffffff0ba7a02 RDX=1ffff110028c6d2a RSI=0000000000000014 RDI=ffff888014636950 RBP=0000000000000008 RSP=ffff88800d667e50 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6c88 R12=ffff888014636000 R13=00007f60b3a90240 R14=0000000000000200 R15=0000000000000040 RIP=ffffffff81830f6b 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 00007f60b4617900 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=00007f60b3a90240 CR3=000000000f696000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0f0a4066c8318bd500000000000ae988 XMM05=7990908852e78e5d00000000001396b0 XMM06=806171799158d9670000000000138130 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=000055bf61bde290 CR3=000000000fb2e000 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=2032313a32353a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a32353a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000