syzkaller login: [ 31.242948] BUG: Bad rss-counter state mm:00000000905b6aa4 type:MM_FILEPAGES val:33 [ 31.244220] BUG: Bad rss-counter state mm:00000000905b6aa4 type:MM_ANONPAGES val:22 [ 31.286008] ================================================================== [ 31.286904] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.287840] Read of size 8 at addr ffff888019d07058 by task sshd/222 [ 31.288611] [ 31.288861] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.289736] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.290726] Call Trace: [ 31.291064] [ 31.291358] dump_stack_lvl+0x91/0xf0 [ 31.291869] print_report+0xcc/0x620 [ 31.292377] ? __virt_addr_valid+0x102/0x340 [ 31.292956] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.293579] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.294238] kasan_report+0xbe/0xf0 [ 31.294734] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.295373] vma_interval_tree_remove+0xc75/0xec0 [ 31.295990] vma_prepare+0xc54/0x11a0 [ 31.296478] __split_vma+0x5af/0x950 [ 31.296994] ? __pfx___split_vma+0x10/0x10 [ 31.297534] ? find_held_lock+0x2c/0x110 [ 31.298060] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.298641] ? lock_is_held_type+0x9f/0x120 [ 31.299182] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.299797] ? mtree_range_walk+0x632/0x900 [ 31.300364] ? mas_walk+0x5c7/0x7c0 [ 31.300853] do_vmi_munmap+0x1f1/0x2b0 [ 31.301359] mmap_region+0x1f9/0x2660 [ 31.301861] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.302372] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.303083] ? __pfx_lock_acquire+0x10/0x10 [ 31.303620] ? __pfx_mmap_region+0x10/0x10 [ 31.304147] ? security_mmap_addr+0x7d/0xa0 [ 31.304709] ? get_unmapped_area+0x1f5/0x3f0 [ 31.305256] do_mmap+0x854/0xf00 [ 31.305701] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.306196] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.306772] ksys_mmap_pgoff+0x3af/0x500 [ 31.307277] do_syscall_64+0x3f/0x90 [ 31.307764] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.308412] RIP: 0033:0x7f65f1c9cd82 [ 31.308885] 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 [ 31.311156] RSP: 002b:00007fffc87960e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.312082] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f65f1c9cd82 [ 31.312988] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f65f10d6000 [ 31.313855] RBP: 00007f65f10d6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.314717] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564ddd029b20 [ 31.315589] R13: 00007fffc8796100 R14: 00007fffc8796130 R15: 00007fffc8796490 [ 31.316462] [ 31.316769] [ 31.316986] Allocated by task 215: [ 31.317427] kasan_save_stack+0x22/0x50 [ 31.317950] kasan_set_track+0x25/0x30 [ 31.318451] __kasan_slab_alloc+0x59/0x70 [ 31.318985] kmem_cache_alloc+0x16b/0x370 [ 31.319506] vm_area_dup+0x20/0x160 [ 31.319958] __split_vma+0x170/0x950 [ 31.320427] split_vma+0xc6/0x110 [ 31.320881] mprotect_fixup+0x8d2/0xb30 [ 31.321381] do_mprotect_pkey+0x87e/0xd40 [ 31.321903] __x64_sys_mprotect+0x78/0xc0 [ 31.322423] do_syscall_64+0x3f/0x90 [ 31.322909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.323555] [ 31.323777] Freed by task 215: [ 31.324172] kasan_save_stack+0x22/0x50 [ 31.324696] kasan_set_track+0x25/0x30 [ 31.325195] kasan_save_free_info+0x2b/0x50 [ 31.325745] __kasan_slab_free+0x10a/0x190 [ 31.326284] kmem_cache_free+0x10d/0x4d0 [ 31.326806] rcu_core+0x8c8/0x2860 [ 31.327249] __do_softirq+0x1b7/0x7d4 [ 31.327731] [ 31.327949] Last potentially related work creation: [ 31.328542] kasan_save_stack+0x22/0x50 [ 31.329064] __kasan_record_aux_stack+0x8e/0xa0 [ 31.329642] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.330288] remove_vma+0x139/0x170 [ 31.330750] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.331304] do_vmi_munmap+0x1f1/0x2b0 [ 31.331794] __vm_munmap+0x138/0x3a0 [ 31.332262] __x64_sys_munmap+0x59/0x80 [ 31.332782] do_syscall_64+0x3f/0x90 [ 31.333255] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.333900] [ 31.334117] The buggy address belongs to the object at ffff888019d07000 [ 31.334117] which belongs to the cache vm_area_struct of size 168 [ 31.335574] The buggy address is located 88 bytes inside of [ 31.335574] freed 168-byte region [ffff888019d07000, ffff888019d070a8) [ 31.336987] [ 31.337206] The buggy address belongs to the physical page: [ 31.337876] page:000000003c89f239 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d07 [ 31.338976] memcg:ffff888019cebd01 [ 31.339404] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.340054] page_type: 0xffffffff() [ 31.340505] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.341446] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019cebd01 [ 31.342368] page dumped because: kasan: bad access detected [ 31.343034] [ 31.343250] Memory state around the buggy address: [ 31.343832] ffff888019d06f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.344694] ffff888019d06f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.345559] >ffff888019d07000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.346413] ^ [ 31.347142] ffff888019d07080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.348014] ffff888019d07100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.348884] ================================================================== [ 31.349980] Disabling lock debugging due to kernel taint [ 33.184817] BUG: Bad rss-counter state mm:0000000089d23f49 type:MM_FILEPAGES val:33 [ 33.186072] BUG: Bad rss-counter state mm:0000000089d23f49 type:MM_ANONPAGES val:22 [ 33.698640] BUG: Bad rss-counter state mm:00000000669c8e8d type:MM_FILEPAGES val:33 [ 33.699825] BUG: Bad rss-counter state mm:00000000669c8e8d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57733' (ECDSA) to the list of known hosts. 2023/06/20 21:12:46 fuzzer started 2023/06/20 21:12:47 dialing manager at localhost:36067 2023/06/20 21:12:47 checking machine... 2023/06/20 21:12:47 checking revisions... [ 34.433090] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:12:47 testing simple program... [ 34.492293] cgroup: Unknown subsys name 'net' [ 34.556023] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:12:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800cb6b680 RSI=ffffffff8170f4e0 RDI=ffff88801433fd90 RBP=ffff88801433fd90 RSP=ffff88801433fbf0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff88800cb8b9f8 R14=ffff88801433fdb8 R15=0000000000000082 RIP=ffffffff817055a2 RFL=00000293 [--S-A-C] 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 00007f513dfe6900 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=00007f513d42a340 CR3=000000000f38c000 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=66207463656e6e6f6373696420646576 XMM04=4ac2cae1112ec61a00000000000ae988 XMM05=1319e678c5640f8a0000000000132938 XMM06=d74844bf967d85ba00000000001328a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88801a060edc RBX=0000000000000014 RCX=0000000000000000 RDX=0000000000000010 RSI=ffff8880087e4000 RDI=ffff88801a060edc RBP=ffff88800f053dc0 RSP=ffff88800f297468 R8 =0000000000000000 R9 =0000000000000004 R10=ffff88801a060eec R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000001 R14=ffff8880087e4000 R15=0000000000000fe8 RIP=ffffffff8451312f 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 00007f3058e05900 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=00007ffcac8a3000 CR3=000000000eb08000 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