syzkaller login: [ 31.244961] BUG: Bad rss-counter state mm:0000000052bddbfa type:MM_FILEPAGES val:33 [ 31.246159] BUG: Bad rss-counter state mm:0000000052bddbfa type:MM_ANONPAGES val:22 [ 31.283673] ================================================================== [ 31.284604] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.285657] Read of size 8 at addr ffff8880163c4a50 by task sshd/220 [ 31.286447] [ 31.286669] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.287583] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.288586] Call Trace: [ 31.288912] [ 31.289199] dump_stack_lvl+0x91/0xf0 [ 31.289693] print_report+0xcc/0x620 [ 31.290191] ? __virt_addr_valid+0x102/0x340 [ 31.290750] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.291390] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.292038] kasan_report+0xbe/0xf0 [ 31.292532] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.293184] vma_interval_tree_remove+0xc75/0xec0 [ 31.293821] vma_prepare+0xc54/0x11a0 [ 31.294330] __split_vma+0x5af/0x950 [ 31.294811] ? __pfx___split_vma+0x10/0x10 [ 31.295389] ? find_held_lock+0x2c/0x110 [ 31.295932] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.296530] ? lock_is_held_type+0x9f/0x120 [ 31.297093] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.297699] ? mtree_range_walk+0x632/0x900 [ 31.298266] ? mas_walk+0x5c7/0x7c0 [ 31.298764] do_vmi_munmap+0x1f1/0x2b0 [ 31.299294] mmap_region+0x1f9/0x2660 [ 31.299810] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.300355] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.301119] ? __pfx_lock_acquire+0x10/0x10 [ 31.301650] ? __pfx_mmap_region+0x10/0x10 [ 31.302192] ? security_mmap_addr+0x7d/0xa0 [ 31.302756] ? get_unmapped_area+0x1f5/0x3f0 [ 31.303350] do_mmap+0x854/0xf00 [ 31.303817] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.304350] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.304945] ksys_mmap_pgoff+0x3af/0x500 [ 31.305470] do_syscall_64+0x3f/0x90 [ 31.305944] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.306638] RIP: 0033:0x7f5f22715d82 [ 31.307147] 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 [ 31.309426] RSP: 002b:00007ffeb38bbe88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.310387] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5f22715d82 [ 31.311255] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5f21b4f000 [ 31.312180] RBP: 00007f5f21b4f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.313111] R10: 0000000000000812 R11: 0000000000000206 R12: 000055becf927ec0 [ 31.314043] R13: 00007ffeb38bbea0 R14: 00007ffeb38bbed0 R15: 00007ffeb38bc230 [ 31.314933] [ 31.315249] [ 31.315482] Allocated by task 213: [ 31.315946] kasan_save_stack+0x22/0x50 [ 31.316499] kasan_set_track+0x25/0x30 [ 31.317038] __kasan_slab_alloc+0x59/0x70 [ 31.317576] kmem_cache_alloc+0x16b/0x370 [ 31.318098] vm_area_dup+0x20/0x160 [ 31.318598] __split_vma+0x170/0x950 [ 31.319115] split_vma+0xc6/0x110 [ 31.319600] mprotect_fixup+0x8d2/0xb30 [ 31.320153] do_mprotect_pkey+0x87e/0xd40 [ 31.320727] __x64_sys_mprotect+0x78/0xc0 [ 31.321290] do_syscall_64+0x3f/0x90 [ 31.321763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.322440] [ 31.322675] Freed by task 213: [ 31.323120] kasan_save_stack+0x22/0x50 [ 31.323672] kasan_set_track+0x25/0x30 [ 31.324226] kasan_save_free_info+0x2b/0x50 [ 31.324822] __kasan_slab_free+0x10a/0x190 [ 31.325413] kmem_cache_free+0x10d/0x4d0 [ 31.325976] rcu_core+0x8c8/0x2860 [ 31.326436] __do_softirq+0x1b7/0x7d4 [ 31.326916] [ 31.327142] Last potentially related work creation: [ 31.327795] kasan_save_stack+0x22/0x50 [ 31.328358] __kasan_record_aux_stack+0x8e/0xa0 [ 31.328992] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.329707] remove_vma+0x139/0x170 [ 31.330207] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.330763] do_vmi_munmap+0x1f1/0x2b0 [ 31.331286] __vm_munmap+0x138/0x3a0 [ 31.331814] __x64_sys_munmap+0x59/0x80 [ 31.332373] do_syscall_64+0x3f/0x90 [ 31.332904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.333576] [ 31.333789] The buggy address belongs to the object at ffff8880163c49f8 [ 31.333789] which belongs to the cache vm_area_struct of size 168 [ 31.335424] The buggy address is located 88 bytes inside of [ 31.335424] freed 168-byte region [ffff8880163c49f8, ffff8880163c4aa0) [ 31.337009] [ 31.337238] The buggy address belongs to the physical page: [ 31.337893] page:00000000058f6502 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x163c4 [ 31.339023] memcg:ffff8880163d6b01 [ 31.339509] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.340247] page_type: 0xffffffff() [ 31.340754] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.341717] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880163d6b01 [ 31.342697] page dumped because: kasan: bad access detected [ 31.343458] [ 31.343702] Memory state around the buggy address: [ 31.344370] ffff8880163c4900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.345327] ffff8880163c4980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.346194] >ffff8880163c4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.347201] ^ [ 31.348008] ffff8880163c4a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.349009] ffff8880163c4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.350012] ================================================================== [ 31.351031] Disabling lock debugging due to kernel taint [ 33.256266] BUG: Bad rss-counter state mm:0000000073220a85 type:MM_FILEPAGES val:33 [ 33.257192] BUG: Bad rss-counter state mm:0000000073220a85 type:MM_ANONPAGES val:22 [ 33.736524] BUG: Bad rss-counter state mm:0000000022a84a27 type:MM_FILEPAGES val:33 [ 33.737515] BUG: Bad rss-counter state mm:0000000022a84a27 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46744' (ECDSA) to the list of known hosts. 2023/06/19 13:22:25 fuzzer started 2023/06/19 13:22:25 dialing manager at localhost:44161 2023/06/19 13:22:25 checking machine... 2023/06/19 13:22:25 checking revisions... [ 34.448655] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:22:25 testing simple program... [ 34.498841] cgroup: Unknown subsys name 'net' [ 34.552936] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:22:25 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=00007f479f9f5830 CR3=0000000019c08000 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=2035323a32323a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a32323a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001d97685 RBX=ffff88800ecbb3f8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800ecbb428 RBP=ffff8880188865e0 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff8880188868d0 R14=ffffffff813782a8 R15=ffff88800da73c00 RIP=ffffffff8184636c 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 00007fd645e93900 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=00007ffd68fc8000 CR3=000000000e7be000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000