syzkaller login: [ 34.127741] BUG: Bad rss-counter state mm:000000005a3bec21 type:MM_FILEPAGES val:33 [ 34.128927] BUG: Bad rss-counter state mm:000000005a3bec21 type:MM_ANONPAGES val:22 [ 34.278960] ================================================================== [ 34.279649] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.280342] Read of size 8 at addr ffff88800e49b3f8 by task sshd/219 [ 34.280905] [ 34.281061] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.281665] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.282355] Call Trace: [ 34.282623] [ 34.282827] dump_stack_lvl+0x91/0xf0 [ 34.283367] print_report+0xcc/0x620 [ 34.283722] ? __virt_addr_valid+0x102/0x340 [ 34.284119] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.284556] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.285003] kasan_report+0xbe/0xf0 [ 34.285346] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.285785] vma_interval_tree_remove+0xc75/0xec0 [ 34.286218] vma_prepare+0xc54/0x11a0 [ 34.286632] __split_vma+0x5af/0x950 [ 34.286986] ? __pfx___split_vma+0x10/0x10 [ 34.287366] ? find_held_lock+0x2c/0x110 [ 34.287777] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.288219] ? lock_is_held_type+0x9f/0x120 [ 34.288606] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.289050] ? mtree_range_walk+0x632/0x900 [ 34.289453] ? mas_walk+0x5c7/0x7c0 [ 34.289820] do_vmi_munmap+0x1f1/0x2b0 [ 34.290170] mmap_region+0x1f9/0x2660 [ 34.290562] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.290972] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.291486] ? __pfx_lock_acquire+0x10/0x10 [ 34.291866] ? __pfx_mmap_region+0x10/0x10 [ 34.292249] ? security_mmap_addr+0x7d/0xa0 [ 34.292620] ? get_unmapped_area+0x1f5/0x3f0 [ 34.293011] do_mmap+0x854/0xf00 [ 34.293317] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.293670] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.294078] ksys_mmap_pgoff+0x3af/0x500 [ 34.294440] do_syscall_64+0x3f/0x90 [ 34.294846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.295302] RIP: 0033:0x7f5eaef56d82 [ 34.295622] 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 [ 34.297180] RSP: 002b:00007ffd522bb438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.297889] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5eaef56d82 [ 34.298559] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5eae390000 [ 34.299139] RBP: 00007f5eae390000 R08: 0000000000000009 R09: 0000000000001000 [ 34.299763] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f53d278d90 [ 34.300430] R13: 00007ffd522bb450 R14: 00007ffd522bb480 R15: 00007ffd522bb7e0 [ 34.301132] [ 34.301339] [ 34.301483] Allocated by task 211: [ 34.301771] kasan_save_stack+0x22/0x50 [ 34.302125] kasan_set_track+0x25/0x30 [ 34.302477] __kasan_slab_alloc+0x59/0x70 [ 34.307015] kmem_cache_alloc+0x16b/0x370 [ 34.307353] vm_area_dup+0x20/0x160 [ 34.307649] __split_vma+0x170/0x950 [ 34.307950] split_vma+0xc6/0x110 [ 34.308256] mprotect_fixup+0x8d2/0xb30 [ 34.308596] do_mprotect_pkey+0x87e/0xd40 [ 34.308959] __x64_sys_mprotect+0x78/0xc0 [ 34.309325] do_syscall_64+0x3f/0x90 [ 34.309644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.310109] [ 34.310247] Freed by task 19: [ 34.310521] kasan_save_stack+0x22/0x50 [ 34.310879] kasan_set_track+0x25/0x30 [ 34.311242] kasan_save_free_info+0x2b/0x50 [ 34.311606] __kasan_slab_free+0x10a/0x190 [ 34.311969] kmem_cache_free+0x10d/0x4d0 [ 34.312330] rcu_core+0x8c8/0x2860 [ 34.312639] __do_softirq+0x1b7/0x7d4 [ 34.312958] [ 34.313101] Last potentially related work creation: [ 34.313530] kasan_save_stack+0x22/0x50 [ 34.313889] __kasan_record_aux_stack+0x8e/0xa0 [ 34.314279] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.314796] remove_vma+0x139/0x170 [ 34.315111] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.315506] do_vmi_munmap+0x1f1/0x2b0 [ 34.315850] __vm_munmap+0x138/0x3a0 [ 34.316173] __x64_sys_munmap+0x59/0x80 [ 34.316521] do_syscall_64+0x3f/0x90 [ 34.316870] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.317311] [ 34.317445] The buggy address belongs to the object at ffff88800e49b3a0 [ 34.317445] which belongs to the cache vm_area_struct of size 168 [ 34.318464] The buggy address is located 88 bytes inside of [ 34.318464] freed 168-byte region [ffff88800e49b3a0, ffff88800e49b448) [ 34.319478] [ 34.319620] The buggy address belongs to the physical page: [ 34.320057] page:00000000801047a5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe49b [ 34.320807] memcg:ffff88800dd2bc01 [ 34.321114] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.321561] page_type: 0xffffffff() [ 34.321855] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 34.322509] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd2bc01 [ 34.323150] page dumped because: kasan: bad access detected [ 34.323607] [ 34.323747] Memory state around the buggy address: [ 34.324167] ffff88800e49b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 34.324758] ffff88800e49b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 34.325371] >ffff88800e49b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 34.325943] ^ [ 34.326555] ffff88800e49b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 34.327139] ffff88800e49b480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.327727] ================================================================== [ 34.328832] Disabling lock debugging due to kernel taint [ 36.014185] BUG: Bad rss-counter state mm:000000000f1e0d88 type:MM_FILEPAGES val:33 [ 36.014926] BUG: Bad rss-counter state mm:000000000f1e0d88 type:MM_ANONPAGES val:22 [ 36.384424] BUG: Bad rss-counter state mm:00000000022c9797 type:MM_FILEPAGES val:33 [ 36.385110] BUG: Bad rss-counter state mm:00000000022c9797 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23225' (ECDSA) to the list of known hosts. 2023/06/20 08:56:25 fuzzer started 2023/06/20 08:56:25 dialing manager at localhost:44161 2023/06/20 08:56:25 checking machine... 2023/06/20 08:56:25 checking revisions... [ 36.971926] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:56:26 testing simple program... [ 37.000472] cgroup: Unknown subsys name 'net' [ 37.038204] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:56:20 Registers: info registers vcpu 0 RAX=ffffffff83634841 RBX=ffffffff85fa2ee8 RCX=ffffffff83634882 RDX=0000000000000000 RSI=ffffffff863b0c40 RDI=ffffffff85fa2ecc RBP=ffffffff85fa2ee8 RSP=ffff88800ff5f928 R8 =ffffffff863b0c40 R9 =ffff88800ff5fa20 R10=0000000000038001 R11=000000000008a6be R12=ffffffff85fa2ee8 R13=ffffffff85fa2ecc R14=ffffffff85fa2ee4 R15=dffffc0000000000 RIP=ffffffff8112fc99 RFL=00000206 [-----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 00007fd1cfc63900 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=00007fd1d0218650 CR3=000000000efa0000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880088db980 RCX=0000000000000040 RDX=0000000000001fa0 RSI=ffff88801600fe60 RDI=ffff8880088db980 RBP=ffff88801600fe60 RSP=ffff88801600fb18 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff8880088db980 R13=0000000000000040 R14=ffff88801600fe88 R15=ffff88801600fea4 RIP=ffffffff81ef5b34 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 00007faae03ad700 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=00007fb08cbc5020 CR3=000000000f500000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732035323a3635 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303730 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000