syzkaller login: [ 30.958586] BUG: Bad rss-counter state mm:0000000063dd6154 type:MM_FILEPAGES val:33 [ 30.959990] BUG: Bad rss-counter state mm:0000000063dd6154 type:MM_ANONPAGES val:22 [ 31.113839] ================================================================== [ 31.114933] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.116036] Read of size 8 at addr ffff88800cf10310 by task sshd/220 [ 31.116851] [ 31.117059] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.117865] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.118768] Call Trace: [ 31.119079] [ 31.119350] dump_stack_lvl+0x91/0xf0 [ 31.119816] print_report+0xcc/0x620 [ 31.120274] ? __virt_addr_valid+0x102/0x340 [ 31.120794] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.121382] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.121965] kasan_report+0xbe/0xf0 [ 31.122414] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.123012] vma_interval_tree_remove+0xc75/0xec0 [ 31.123588] vma_prepare+0xc54/0x11a0 [ 31.124039] __split_vma+0x5af/0x950 [ 31.124488] ? __pfx___split_vma+0x10/0x10 [ 31.124985] ? find_held_lock+0x2c/0x110 [ 31.125477] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.126020] ? lock_is_held_type+0x9f/0x120 [ 31.126529] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.127127] ? mtree_range_walk+0x632/0x900 [ 31.127655] ? mas_walk+0x5c7/0x7c0 [ 31.128104] do_vmi_munmap+0x1f1/0x2b0 [ 31.128569] mmap_region+0x1f9/0x2660 [ 31.129026] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.129509] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.130180] ? __pfx_lock_acquire+0x10/0x10 [ 31.130681] ? __pfx_mmap_region+0x10/0x10 [ 31.131187] ? security_mmap_addr+0x7d/0xa0 [ 31.131690] ? get_unmapped_area+0x1f5/0x3f0 [ 31.132306] do_mmap+0x854/0xf00 [ 31.132820] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.133405] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.134065] ksys_mmap_pgoff+0x3af/0x500 [ 31.134663] do_syscall_64+0x3f/0x90 [ 31.135242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.136010] RIP: 0033:0x7f363dd1ad82 [ 31.136547] 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 [ 31.139072] RSP: 002b:00007ffd516d6358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.140137] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f363dd1ad82 [ 31.141137] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f363d154000 [ 31.142132] RBP: 00007f363d154000 R08: 0000000000000009 R09: 0000000000001000 [ 31.143143] R10: 0000000000000812 R11: 0000000000000206 R12: 000056110359aec0 [ 31.144139] R13: 00007ffd516d6370 R14: 00007ffd516d63a0 R15: 00007ffd516d6700 [ 31.145149] [ 31.145492] [ 31.145741] Allocated by task 213: [ 31.146244] kasan_save_stack+0x22/0x50 [ 31.146836] kasan_set_track+0x25/0x30 [ 31.147426] __kasan_slab_alloc+0x59/0x70 [ 31.148043] kmem_cache_alloc+0x16b/0x370 [ 31.148649] vm_area_dup+0x20/0x160 [ 31.149185] __split_vma+0x170/0x950 [ 31.149730] split_vma+0xc6/0x110 [ 31.150244] mprotect_fixup+0x8d2/0xb30 [ 31.150831] do_mprotect_pkey+0x87e/0xd40 [ 31.151458] __x64_sys_mprotect+0x78/0xc0 [ 31.152070] do_syscall_64+0x3f/0x90 [ 31.152628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.153384] [ 31.153635] Freed by task 213: [ 31.154097] kasan_save_stack+0x22/0x50 [ 31.154687] kasan_set_track+0x25/0x30 [ 31.155281] kasan_save_free_info+0x2b/0x50 [ 31.155908] __kasan_slab_free+0x10a/0x190 [ 31.156532] kmem_cache_free+0x10d/0x4d0 [ 31.157129] rcu_core+0x8c8/0x2860 [ 31.157663] __do_softirq+0x1b7/0x7d4 [ 31.158226] [ 31.158479] Last potentially related work creation: [ 31.159180] kasan_save_stack+0x22/0x50 [ 31.159772] __kasan_record_aux_stack+0x8e/0xa0 [ 31.160446] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.161201] remove_vma+0x139/0x170 [ 31.161731] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.162391] do_vmi_munmap+0x1f1/0x2b0 [ 31.162962] __vm_munmap+0x138/0x3a0 [ 31.163533] __x64_sys_munmap+0x59/0x80 [ 31.164122] do_syscall_64+0x3f/0x90 [ 31.164673] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.165398] [ 31.165645] The buggy address belongs to the object at ffff88800cf102b8 [ 31.165645] which belongs to the cache vm_area_struct of size 168 [ 31.167337] The buggy address is located 88 bytes inside of [ 31.167337] freed 168-byte region [ffff88800cf102b8, ffff88800cf10360) [ 31.168922] [ 31.169168] The buggy address belongs to the physical page: [ 31.169924] page:00000000ba5e2564 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcf10 [ 31.171170] memcg:ffff88800cf11001 [ 31.171665] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.172387] page_type: 0xffffffff() [ 31.172895] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.173958] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cf11001 [ 31.174879] page dumped because: kasan: bad access detected [ 31.175578] [ 31.175793] Memory state around the buggy address: [ 31.176386] ffff88800cf10200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.177263] ffff88800cf10280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.178135] >ffff88800cf10300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.179016] ^ [ 31.179497] ffff88800cf10380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.180371] ffff88800cf10400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.181239] ================================================================== [ 31.182236] Disabling lock debugging due to kernel taint [ 32.769418] BUG: Bad rss-counter state mm:000000000138e8ee type:MM_FILEPAGES val:33 [ 32.771252] BUG: Bad rss-counter state mm:000000000138e8ee type:MM_ANONPAGES val:22 [ 33.280680] BUG: Bad rss-counter state mm:00000000eb50ba35 type:MM_FILEPAGES val:33 [ 33.281866] BUG: Bad rss-counter state mm:00000000eb50ba35 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31216' (ECDSA) to the list of known hosts. 2023/06/21 08:52:57 fuzzer started 2023/06/21 08:52:57 dialing manager at localhost:36067 2023/06/21 08:52:57 checking machine... 2023/06/21 08:52:57 checking revisions... [ 33.991526] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:52:58 testing simple program... [ 34.044651] cgroup: Unknown subsys name 'net' [ 34.089387] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:52:57 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff110011b3f77 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff888008d9fb98 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=0000000000000000 R13=0000000000000000 R14=ffff88806ce361a0 R15=0000000000000000 RIP=ffffffff8135b93c RFL=00000083 [--S---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 =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=00007f8b1ffba0b0 CR3=000000000f15a000 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=32353a3830203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363335 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=00007f05b1d9e960 CR3=000000000c506000 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=ba38802b6a5a63821f4100f6b0d37fb1 XMM02=000000000011d228eff9b2d0a8fce9cb XMM03=000000000011d2f82c67c8bc2e329bc3 XMM04=ce0ffb8ae7d67d1d00000000000ae988 XMM05=d35394ecfad795400000000000131d90 XMM06=4fda316b135da52b0000000000131788 XMM07=e042d86d42eb936e0000000000121cb8 XMM08=7606b988824a2e1d000000000011d2f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000