syzkaller login: [ 30.800819] BUG: Bad rss-counter state mm:0000000018ab6b89 type:MM_FILEPAGES val:33 [ 30.802793] BUG: Bad rss-counter state mm:0000000018ab6b89 type:MM_ANONPAGES val:22 [ 30.966402] ================================================================== [ 30.967465] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.968569] Read of size 8 at addr ffff88800ff72c20 by task sshd/219 [ 30.969581] [ 30.969841] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.970746] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.971723] Call Trace: [ 30.972046] [ 30.972327] dump_stack_lvl+0x91/0xf0 [ 30.972825] print_report+0xcc/0x620 [ 30.973318] ? __virt_addr_valid+0x102/0x340 [ 30.973871] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.974484] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.975095] kasan_report+0xbe/0xf0 [ 30.975561] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.976180] vma_interval_tree_remove+0xc75/0xec0 [ 30.976777] vma_prepare+0xc54/0x11a0 [ 30.977273] __split_vma+0x5af/0x950 [ 30.977742] ? __pfx___split_vma+0x10/0x10 [ 30.978263] ? find_held_lock+0x2c/0x110 [ 30.978783] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.979339] ? lock_is_held_type+0x9f/0x120 [ 30.979871] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.980467] ? mtree_range_walk+0x632/0x900 [ 30.981010] ? mas_walk+0x5c7/0x7c0 [ 30.981493] do_vmi_munmap+0x1f1/0x2b0 [ 30.981977] mmap_region+0x1f9/0x2660 [ 30.982464] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.982967] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.983704] ? __pfx_lock_acquire+0x10/0x10 [ 30.984258] ? __pfx_mmap_region+0x10/0x10 [ 30.984810] ? security_mmap_addr+0x7d/0xa0 [ 30.985367] ? get_unmapped_area+0x1f5/0x3f0 [ 30.985937] do_mmap+0x854/0xf00 [ 30.986389] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.986901] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.987478] ksys_mmap_pgoff+0x3af/0x500 [ 30.988003] do_syscall_64+0x3f/0x90 [ 30.988500] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.989180] RIP: 0033:0x7f81b44b0d82 [ 30.989681] 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 [ 30.991908] RSP: 002b:00007ffe0a270eb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.992850] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f81b44b0d82 [ 30.993745] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f81b38ea000 [ 30.994616] RBP: 00007f81b38ea000 R08: 0000000000000009 R09: 0000000000001000 [ 30.995504] R10: 0000000000000812 R11: 0000000000000206 R12: 00005576d7b0dec0 [ 30.996384] R13: 00007ffe0a270ed0 R14: 00007ffe0a270f00 R15: 00007ffe0a271260 [ 30.997289] [ 30.997595] [ 30.997823] Allocated by task 212: [ 30.998268] kasan_save_stack+0x22/0x50 [ 30.998795] kasan_set_track+0x25/0x30 [ 30.999314] __kasan_slab_alloc+0x59/0x70 [ 30.999854] kmem_cache_alloc+0x16b/0x370 [ 31.000398] vm_area_dup+0x20/0x160 [ 31.000867] __split_vma+0x170/0x950 [ 31.001380] split_vma+0xc6/0x110 [ 31.001833] mprotect_fixup+0x8d2/0xb30 [ 31.002362] do_mprotect_pkey+0x87e/0xd40 [ 31.002903] __x64_sys_mprotect+0x78/0xc0 [ 31.003447] do_syscall_64+0x3f/0x90 [ 31.003946] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.004621] [ 31.004851] Freed by task 212: [ 31.005260] kasan_save_stack+0x22/0x50 [ 31.005776] kasan_set_track+0x25/0x30 [ 31.006284] kasan_save_free_info+0x2b/0x50 [ 31.006833] __kasan_slab_free+0x10a/0x190 [ 31.007391] kmem_cache_free+0x10d/0x4d0 [ 31.007918] rcu_core+0x8c8/0x2860 [ 31.008378] __do_softirq+0x1b7/0x7d4 [ 31.008878] [ 31.009102] Last potentially related work creation: [ 31.009732] kasan_save_stack+0x22/0x50 [ 31.010252] __kasan_record_aux_stack+0x8e/0xa0 [ 31.010858] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.011520] remove_vma+0x139/0x170 [ 31.011992] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.012562] do_vmi_munmap+0x1f1/0x2b0 [ 31.013071] __vm_munmap+0x138/0x3a0 [ 31.013568] __x64_sys_munmap+0x59/0x80 [ 31.014088] do_syscall_64+0x3f/0x90 [ 31.014577] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.015244] [ 31.015468] The buggy address belongs to the object at ffff88800ff72bc8 [ 31.015468] which belongs to the cache vm_area_struct of size 168 [ 31.017005] The buggy address is located 88 bytes inside of [ 31.017005] freed 168-byte region [ffff88800ff72bc8, ffff88800ff72c70) [ 31.018507] [ 31.018737] The buggy address belongs to the physical page: [ 31.019431] page:00000000282c5acf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xff72 [ 31.020553] memcg:ffff888019cc9101 [ 31.021001] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.021686] page_type: 0xffffffff() [ 31.022154] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.023125] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019cc9101 [ 31.024079] page dumped because: kasan: bad access detected [ 31.024771] [ 31.024990] Memory state around the buggy address: [ 31.025608] ffff88800ff72b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.026509] ffff88800ff72b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.027397] >ffff88800ff72c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.028287] ^ [ 31.028838] ffff88800ff72c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.029761] ffff88800ff72d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.030654] ================================================================== [ 31.032000] Disabling lock debugging due to kernel taint [ 33.176476] BUG: Bad rss-counter state mm:000000000ce4a46e type:MM_FILEPAGES val:33 [ 33.177739] BUG: Bad rss-counter state mm:000000000ce4a46e type:MM_ANONPAGES val:22 [ 33.657743] BUG: Bad rss-counter state mm:000000008fc35cf7 type:MM_FILEPAGES val:33 [ 33.658718] BUG: Bad rss-counter state mm:000000008fc35cf7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6854' (ECDSA) to the list of known hosts. 2023/06/20 18:18:06 fuzzer started 2023/06/20 18:18:06 dialing manager at localhost:36067 2023/06/20 18:18:06 checking machine... 2023/06/20 18:18:06 checking revisions... [ 34.381978] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:18:06 testing simple program... [ 34.428761] cgroup: Unknown subsys name 'net' [ 34.477479] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:18:05 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f109521a9c0 CR3=0000000019efe000 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=2035303a38313a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a38313a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11002d77fcd RSI=000000000000000c RDI=0000000000000007 RBP=ffff888016bbfe60 RSP=ffff888016bbfb50 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000000a4 R11=000008ee000008ee R12=00000000000000a4 R13=0000000000000000 R14=0000000000000000 R15=ffff888016bbfea4 RIP=ffffffff83636269 RFL=00000246 [---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 00007f1a5dc38900 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=00007ffcd2dec000 CR3=000000000eea6000 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