syzkaller login: [ 32.049538] BUG: Bad rss-counter state mm:00000000309b8ea6 type:MM_FILEPAGES val:33 [ 32.051231] BUG: Bad rss-counter state mm:00000000309b8ea6 type:MM_ANONPAGES val:22 [ 32.214243] ================================================================== [ 32.215149] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.216083] Read of size 8 at addr ffff888016a24228 by task sshd/221 [ 32.216840] [ 32.217057] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.218034] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.219052] Call Trace: [ 32.219377] [ 32.219678] dump_stack_lvl+0x91/0xf0 [ 32.220179] print_report+0xcc/0x620 [ 32.220666] ? __virt_addr_valid+0x102/0x340 [ 32.221218] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.221836] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.222470] kasan_report+0xbe/0xf0 [ 32.222945] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.223560] vma_interval_tree_remove+0xc75/0xec0 [ 32.224165] vma_prepare+0xc54/0x11a0 [ 32.224640] __split_vma+0x5af/0x950 [ 32.225113] ? __pfx___split_vma+0x10/0x10 [ 32.225638] ? find_held_lock+0x2c/0x110 [ 32.226157] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.226741] ? lock_is_held_type+0x9f/0x120 [ 32.227279] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.227886] ? mtree_range_walk+0x632/0x900 [ 32.228431] ? mas_walk+0x5c7/0x7c0 [ 32.228910] do_vmi_munmap+0x1f1/0x2b0 [ 32.229413] mmap_region+0x1f9/0x2660 [ 32.229903] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.230475] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.231198] ? __pfx_lock_acquire+0x10/0x10 [ 32.231725] ? __pfx_mmap_region+0x10/0x10 [ 32.232255] ? security_mmap_addr+0x7d/0xa0 [ 32.232793] ? get_unmapped_area+0x1f5/0x3f0 [ 32.233348] do_mmap+0x854/0xf00 [ 32.233785] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.234291] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.234859] ksys_mmap_pgoff+0x3af/0x500 [ 32.235365] do_syscall_64+0x3f/0x90 [ 32.235854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.236504] RIP: 0033:0x7f9734941d82 [ 32.236963] 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 [ 32.239068] RSP: 002b:00007ffdc39aeb08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.239967] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9734941d82 [ 32.240805] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9733d7b000 [ 32.241647] RBP: 00007f9733d7b000 R08: 0000000000000009 R09: 0000000000001000 [ 32.242493] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561cbeed1ec0 [ 32.243328] R13: 00007ffdc39aeb20 R14: 00007ffdc39aeb50 R15: 00007ffdc39aeeb0 [ 32.244186] [ 32.244486] [ 32.244704] Allocated by task 214: [ 32.245128] kasan_save_stack+0x22/0x50 [ 32.245632] kasan_set_track+0x25/0x30 [ 32.246127] __kasan_slab_alloc+0x59/0x70 [ 32.246665] kmem_cache_alloc+0x16b/0x370 [ 32.247182] vm_area_dup+0x20/0x160 [ 32.247632] __split_vma+0x170/0x950 [ 32.248092] split_vma+0xc6/0x110 [ 32.248530] mprotect_fixup+0x8d2/0xb30 [ 32.249028] do_mprotect_pkey+0x87e/0xd40 [ 32.249545] __x64_sys_mprotect+0x78/0xc0 [ 32.250059] do_syscall_64+0x3f/0x90 [ 32.250538] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.251176] [ 32.251395] Freed by task 214: [ 32.251784] kasan_save_stack+0x22/0x50 [ 32.252288] kasan_set_track+0x25/0x30 [ 32.252784] kasan_save_free_info+0x2b/0x50 [ 32.253314] __kasan_slab_free+0x10a/0x190 [ 32.253851] kmem_cache_free+0x10d/0x4d0 [ 32.254366] rcu_core+0x8c8/0x2860 [ 32.254804] __do_softirq+0x1b7/0x7d4 [ 32.255279] [ 32.255496] Last potentially related work creation: [ 32.256071] kasan_save_stack+0x22/0x50 [ 32.256574] __kasan_record_aux_stack+0x8e/0xa0 [ 32.257141] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.257787] remove_vma+0x139/0x170 [ 32.258257] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.258818] do_vmi_munmap+0x1f1/0x2b0 [ 32.259304] __vm_munmap+0x138/0x3a0 [ 32.259773] __x64_sys_munmap+0x59/0x80 [ 32.260272] do_syscall_64+0x3f/0x90 [ 32.260745] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.261383] [ 32.261601] The buggy address belongs to the object at ffff888016a241d0 [ 32.261601] which belongs to the cache vm_area_struct of size 168 [ 32.263067] The buggy address is located 88 bytes inside of [ 32.263067] freed 168-byte region [ffff888016a241d0, ffff888016a24278) [ 32.264448] [ 32.264666] The buggy address belongs to the physical page: [ 32.265319] page:000000002b123571 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a24 [ 32.266424] memcg:ffff88800fad5401 [ 32.266845] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.267549] page_type: 0xffffffff() [ 32.268004] raw: 0100000000000200 ffff8880087a0c80 ffffea00005a8ac0 0000000000000003 [ 32.268924] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fad5401 [ 32.269826] page dumped because: kasan: bad access detected [ 32.270499] [ 32.270712] Memory state around the buggy address: [ 32.271296] ffff888016a24100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.272159] ffff888016a24180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.273012] >ffff888016a24200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.273857] ^ [ 32.274430] ffff888016a24280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.275272] ffff888016a24300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.276120] ================================================================== [ 32.277087] Disabling lock debugging due to kernel taint [ 34.160190] BUG: Bad rss-counter state mm:0000000022f700a0 type:MM_FILEPAGES val:33 [ 34.161070] BUG: Bad rss-counter state mm:0000000022f700a0 type:MM_ANONPAGES val:22 [ 34.646821] BUG: Bad rss-counter state mm:00000000c1ec9229 type:MM_FILEPAGES val:33 [ 34.648039] BUG: Bad rss-counter state mm:00000000c1ec9229 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41613' (ECDSA) to the list of known hosts. 2023/06/20 16:32:04 fuzzer started 2023/06/20 16:32:04 dialing manager at localhost:36067 2023/06/20 16:32:04 checking machine... 2023/06/20 16:32:04 checking revisions... [ 35.345670] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:32:04 testing simple program... [ 35.397360] cgroup: Unknown subsys name 'net' [ 35.432747] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:32:04 Registers: info registers vcpu 0 RAX=0000000000020d9c RBX=0000000000000002 RCX=ffffffff8180c704 RDX=000000000000000c RSI=ffffffff86138eb0 RDI=ffffffff85dfe034 RBP=ffff88806ce09af0 RSP=ffff88806ce09a18 R8 =ffffffff86138eb0 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d9c R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8112fc12 RFL=00000216 [----AP-] 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=00007f4e3adc8c80 CR3=000000000db22000 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=32333a3631203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383532 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=0000000000000001 RCX=ffffffff86138a60 RDX=1ffff11002d31e37 RSI=1ffff11002d31e36 RDI=1ffff11002d31e36 RBP=ffff88801698f1b0 RSP=ffff88801698f0e8 R8 =ffffffff86138a64 R9 =ffff88801698f198 R10=0000000000038001 R11=0000000000020ce4 R12=ffff88801698f1b8 R13=ffff88801698f1a0 R14=ffff88801698f448 R15=ffff88801698f158 RIP=ffffffff811310ce 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 00007f95dc059900 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=0000555d52334b88 CR3=000000000d6ca000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000