syzkaller login: [ 30.978913] BUG: Bad rss-counter state mm:000000006e512548 type:MM_FILEPAGES val:33 [ 30.979946] BUG: Bad rss-counter state mm:000000006e512548 type:MM_ANONPAGES val:22 [ 31.144656] ================================================================== [ 31.145830] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.146952] Read of size 8 at addr ffff88800e485310 by task sshd/221 [ 31.147787] [ 31.148010] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.148904] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.149918] Call Trace: [ 31.150244] [ 31.150534] dump_stack_lvl+0x91/0xf0 [ 31.151040] print_report+0xcc/0x620 [ 31.151524] ? __virt_addr_valid+0x102/0x340 [ 31.152074] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.152689] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.153333] kasan_report+0xbe/0xf0 [ 31.153824] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.154449] vma_interval_tree_remove+0xc75/0xec0 [ 31.155054] vma_prepare+0xc54/0x11a0 [ 31.155530] __split_vma+0x5af/0x950 [ 31.156013] ? __pfx___split_vma+0x10/0x10 [ 31.156548] ? find_held_lock+0x2c/0x110 [ 31.157085] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.157686] ? lock_is_held_type+0x9f/0x120 [ 31.158239] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.158860] ? mtree_range_walk+0x632/0x900 [ 31.159449] ? mas_walk+0x5c7/0x7c0 [ 31.159933] do_vmi_munmap+0x1f1/0x2b0 [ 31.160426] mmap_region+0x1f9/0x2660 [ 31.160904] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.161463] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.162212] ? __pfx_lock_acquire+0x10/0x10 [ 31.162738] ? __pfx_mmap_region+0x10/0x10 [ 31.163264] ? security_mmap_addr+0x7d/0xa0 [ 31.163806] ? get_unmapped_area+0x1f5/0x3f0 [ 31.164371] do_mmap+0x854/0xf00 [ 31.164818] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.165312] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.165894] ksys_mmap_pgoff+0x3af/0x500 [ 31.166415] do_syscall_64+0x3f/0x90 [ 31.166904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.167548] RIP: 0033:0x7f9f833c8d82 [ 31.168003] 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 [ 31.170185] RSP: 002b:00007ffdae2c1758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.171109] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9f833c8d82 [ 31.171992] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9f82802000 [ 31.172852] RBP: 00007f9f82802000 R08: 0000000000000009 R09: 0000000000001000 [ 31.173727] R10: 0000000000000812 R11: 0000000000000206 R12: 000056544a08cf70 [ 31.174587] R13: 00007ffdae2c1770 R14: 00007ffdae2c17a0 R15: 00007ffdae2c1b00 [ 31.175463] [ 31.175756] [ 31.175973] Allocated by task 214: [ 31.176409] kasan_save_stack+0x22/0x50 [ 31.176911] kasan_set_track+0x25/0x30 [ 31.177409] __kasan_slab_alloc+0x59/0x70 [ 31.177958] kmem_cache_alloc+0x16b/0x370 [ 31.178488] vm_area_dup+0x20/0x160 [ 31.178950] __split_vma+0x170/0x950 [ 31.179426] split_vma+0xc6/0x110 [ 31.179869] mprotect_fixup+0x8d2/0xb30 [ 31.180387] do_mprotect_pkey+0x87e/0xd40 [ 31.180936] __x64_sys_mprotect+0x78/0xc0 [ 31.181466] do_syscall_64+0x3f/0x90 [ 31.181974] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.182631] [ 31.182850] Freed by task 214: [ 31.183246] kasan_save_stack+0x22/0x50 [ 31.183805] kasan_set_track+0x25/0x30 [ 31.184314] kasan_save_free_info+0x2b/0x50 [ 31.184838] __kasan_slab_free+0x10a/0x190 [ 31.185374] kmem_cache_free+0x10d/0x4d0 [ 31.185911] rcu_core+0x8c8/0x2860 [ 31.186367] __do_softirq+0x1b7/0x7d4 [ 31.186842] [ 31.187056] Last potentially related work creation: [ 31.187653] kasan_save_stack+0x22/0x50 [ 31.188157] __kasan_record_aux_stack+0x8e/0xa0 [ 31.188729] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.189364] remove_vma+0x139/0x170 [ 31.189814] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.190379] do_vmi_munmap+0x1f1/0x2b0 [ 31.190859] __vm_munmap+0x138/0x3a0 [ 31.191333] __x64_sys_munmap+0x59/0x80 [ 31.191827] do_syscall_64+0x3f/0x90 [ 31.192304] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.192997] [ 31.193213] The buggy address belongs to the object at ffff88800e4852b8 [ 31.193213] which belongs to the cache vm_area_struct of size 168 [ 31.194727] The buggy address is located 88 bytes inside of [ 31.194727] freed 168-byte region [ffff88800e4852b8, ffff88800e485360) [ 31.196205] [ 31.196421] The buggy address belongs to the physical page: [ 31.197095] page:0000000028246fcc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe485 [ 31.198227] memcg:ffff8880146de301 [ 31.198660] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.199320] page_type: 0xffffffff() [ 31.199779] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.200705] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880146de301 [ 31.201631] page dumped because: kasan: bad access detected [ 31.202305] [ 31.202519] Memory state around the buggy address: [ 31.203116] ffff88800e485200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.203982] ffff88800e485280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.204852] >ffff88800e485300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.205743] ^ [ 31.206221] ffff88800e485380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.207089] ffff88800e485400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.207953] ================================================================== [ 31.208941] Disabling lock debugging due to kernel taint [ 33.026927] BUG: Bad rss-counter state mm:00000000d8350a69 type:MM_FILEPAGES val:33 [ 33.027637] BUG: Bad rss-counter state mm:00000000d8350a69 type:MM_ANONPAGES val:22 [ 33.475508] BUG: Bad rss-counter state mm:000000002bb81d10 type:MM_FILEPAGES val:33 [ 33.476559] BUG: Bad rss-counter state mm:000000002bb81d10 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18652' (ECDSA) to the list of known hosts. 2023/06/20 11:13:44 fuzzer started 2023/06/20 11:13:45 dialing manager at localhost:36067 2023/06/20 11:13:45 checking machine... 2023/06/20 11:13:45 checking revisions... [ 34.159029] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:13:45 testing simple program... [ 34.211534] cgroup: Unknown subsys name 'net' [ 34.259784] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:13:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000100 RDX=ffff888008d90000 RSI=ffffffff8186b843 RDI=ffff888018ca6100 RBP=ffff8880069ee780 RSP=ffff888008d9fd20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000128 R12=ffff888018ca6100 R13=ffff888008d9fdc8 R14=ffff88806ce35000 R15=ffff8880069ee780 RIP=ffffffff812134c4 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 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=00007f1d2bbd20b0 CR3=0000000015882000 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=33313a3131203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363934 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=dffffc0000000000 RBX=ffff888008e37978 RCX=ffffffff860b0950 RDX=1ffff110011c6f2f RSI=ffff888008e37f18 RDI=ffff888008e37978 RBP=ffff888008e37f18 RSP=ffff888008e378d0 R8 =ffffffff860b0954 R9 =ffff888008e379b8 R10=0000000000038001 R11=000000000000a20c R12=0000000000000008 R13=ffff888008e379c0 R14=ffff888008e37f20 R15=ffff888008e37978 RIP=ffffffff81130416 RFL=00000282 [--S----] 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 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=00007f3bb6352350 CR3=0000000015882000 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=2034343a33313a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a33313a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000