syzkaller login: [ 31.614316] BUG: Bad rss-counter state mm:00000000edd29a2c type:MM_FILEPAGES val:33 [ 31.615378] BUG: Bad rss-counter state mm:00000000edd29a2c type:MM_ANONPAGES val:22 [ 31.778293] ================================================================== [ 31.779240] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.780184] Read of size 8 at addr ffff888008c67c20 by task sshd/219 [ 31.780969] [ 31.781185] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.782230] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.783233] Call Trace: [ 31.783557] [ 31.783867] dump_stack_lvl+0x91/0xf0 [ 31.784361] print_report+0xcc/0x620 [ 31.784854] ? __virt_addr_valid+0x102/0x340 [ 31.785401] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.786027] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.786662] kasan_report+0xbe/0xf0 [ 31.787148] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.787779] vma_interval_tree_remove+0xc75/0xec0 [ 31.788389] vma_prepare+0xc54/0x11a0 [ 31.788861] __split_vma+0x5af/0x950 [ 31.789330] ? __pfx___split_vma+0x10/0x10 [ 31.789858] ? find_held_lock+0x2c/0x110 [ 31.790370] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.790935] ? lock_is_held_type+0x9f/0x120 [ 31.791469] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.792074] ? mtree_range_walk+0x632/0x900 [ 31.792629] ? mas_walk+0x5c7/0x7c0 [ 31.793122] do_vmi_munmap+0x1f1/0x2b0 [ 31.793618] mmap_region+0x1f9/0x2660 [ 31.794098] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.794608] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.795350] ? __pfx_lock_acquire+0x10/0x10 [ 31.795907] ? __pfx_mmap_region+0x10/0x10 [ 31.796433] ? security_mmap_addr+0x7d/0xa0 [ 31.796969] ? get_unmapped_area+0x1f5/0x3f0 [ 31.797517] do_mmap+0x854/0xf00 [ 31.797958] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.798449] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.799024] ksys_mmap_pgoff+0x3af/0x500 [ 31.799538] do_syscall_64+0x3f/0x90 [ 31.800028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.800679] RIP: 0033:0x7f3c049d3d82 [ 31.801136] 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 [ 31.803275] RSP: 002b:00007fff041db178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.804169] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c049d3d82 [ 31.805016] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c03e0d000 [ 31.805860] RBP: 00007f3c03e0d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.806718] R10: 0000000000000812 R11: 0000000000000206 R12: 00005626991d5ec0 [ 31.807577] R13: 00007fff041db190 R14: 00007fff041db1c0 R15: 00007fff041db520 [ 31.808428] [ 31.808728] [ 31.808940] Allocated by task 212: [ 31.809369] kasan_save_stack+0x22/0x50 [ 31.809878] kasan_set_track+0x25/0x30 [ 31.810368] __kasan_slab_alloc+0x59/0x70 [ 31.810889] kmem_cache_alloc+0x16b/0x370 [ 31.811424] vm_area_dup+0x20/0x160 [ 31.811880] __split_vma+0x170/0x950 [ 31.812346] split_vma+0xc6/0x110 [ 31.812785] mprotect_fixup+0x8d2/0xb30 [ 31.813285] do_mprotect_pkey+0x87e/0xd40 [ 31.813803] __x64_sys_mprotect+0x78/0xc0 [ 31.814315] do_syscall_64+0x3f/0x90 [ 31.814788] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.815449] [ 31.815668] Freed by task 212: [ 31.816059] kasan_save_stack+0x22/0x50 [ 31.816563] kasan_set_track+0x25/0x30 [ 31.817059] kasan_save_free_info+0x2b/0x50 [ 31.817599] __kasan_slab_free+0x10a/0x190 [ 31.818134] kmem_cache_free+0x10d/0x4d0 [ 31.818639] rcu_core+0x8c8/0x2860 [ 31.819100] __do_softirq+0x1b7/0x7d4 [ 31.819577] [ 31.819790] Last potentially related work creation: [ 31.820374] kasan_save_stack+0x22/0x50 [ 31.820882] __kasan_record_aux_stack+0x8e/0xa0 [ 31.821452] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.822093] remove_vma+0x139/0x170 [ 31.822543] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.823128] do_vmi_munmap+0x1f1/0x2b0 [ 31.823613] __vm_munmap+0x138/0x3a0 [ 31.824079] __x64_sys_munmap+0x59/0x80 [ 31.824571] do_syscall_64+0x3f/0x90 [ 31.825053] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.825697] [ 31.825913] Second to last potentially related work creation: [ 31.826590] kasan_save_stack+0x22/0x50 [ 31.827099] __kasan_record_aux_stack+0x8e/0xa0 [ 31.827677] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.828316] remove_vma+0x139/0x170 [ 31.828770] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.829335] do_vmi_munmap+0x1f1/0x2b0 [ 31.829820] __vm_munmap+0x138/0x3a0 [ 31.830290] __x64_sys_munmap+0x59/0x80 [ 31.830788] do_syscall_64+0x3f/0x90 [ 31.831275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.831918] [ 31.832133] The buggy address belongs to the object at ffff888008c67bc8 [ 31.832133] which belongs to the cache vm_area_struct of size 168 [ 31.833597] The buggy address is located 88 bytes inside of [ 31.833597] freed 168-byte region [ffff888008c67bc8, ffff888008c67c70) [ 31.835007] [ 31.835223] The buggy address belongs to the physical page: [ 31.835884] page:0000000056c78bcb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8c67 [ 31.836958] memcg:ffff88800d96ad01 [ 31.837388] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.838035] page_type: 0xffffffff() [ 31.838489] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b68c0 dead000000000008 [ 31.839414] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d96ad01 [ 31.840321] page dumped because: kasan: bad access detected [ 31.840980] [ 31.841197] Memory state around the buggy address: [ 31.841769] ffff888008c67b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.842631] ffff888008c67b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.843497] >ffff888008c67c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.844354] ^ [ 31.844887] ffff888008c67c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.845737] ffff888008c67d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.846590] ================================================================== [ 31.847842] Disabling lock debugging due to kernel taint [ 34.006072] BUG: Bad rss-counter state mm:00000000a971a301 type:MM_FILEPAGES val:33 [ 34.007106] BUG: Bad rss-counter state mm:00000000a971a301 type:MM_ANONPAGES val:22 [ 34.586890] BUG: Bad rss-counter state mm:00000000ee299bea type:MM_FILEPAGES val:33 [ 34.588094] BUG: Bad rss-counter state mm:00000000ee299bea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23646' (ECDSA) to the list of known hosts. 2023/06/21 02:01:44 fuzzer started 2023/06/21 02:01:45 dialing manager at localhost:36067 2023/06/21 02:01:45 checking machine... 2023/06/21 02:01:45 checking revisions... [ 35.252981] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:01:45 testing simple program... [ 35.302901] cgroup: Unknown subsys name 'net' [ 35.339373] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:01:44 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000002 RCX=00007f714c8f43ff RDX=0000562ab5182788 RSI=0000000000000001 RDI=0000000000000000 RBP=0000000000000058 RSP=00007f714c46fd18 R8 =0000000000000000 R9 =0000562ab548ae88 R10=0000000000000000 R11=0000000000000000 R12=0000000000000001 R13=00007f713c000b80 R14=0000562ab5182a50 R15=00007f714c543840 RIP=0000562ab5108037 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f714c470700 00000000 00000000 GS =0000 0000000000000000 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=00007ffcc72f6000 CR3=000000000f678000 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=31303a3230203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732034343a3130 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343635 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=ffff888008c04400 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=00007f16991516f0 CR3=000000000c7fe000 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=05777bee17fa3fa2e24e285b361851a0 XMM02=ec2efd57dc4c00df000000000011bab8 XMM03=3e19d3d8b73adaa0000000000011bb88 XMM04=8f1623bfd129addd00000000000ae988 XMM05=dfcdbad4f1609c3700000000001337a0 XMM06=806171799158d9670000000000133628 XMM07=e042d86d42eb936e0000000000122b88 XMM08=3e19d3d8b73adaa0000000000011bb88 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000