syzkaller login: [ 30.155315] BUG: Bad rss-counter state mm:0000000086b0a2cc type:MM_FILEPAGES val:33 [ 30.156517] BUG: Bad rss-counter state mm:0000000086b0a2cc type:MM_ANONPAGES val:22 [ 30.193067] ================================================================== [ 30.194020] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.194993] Read of size 8 at addr ffff888018363798 by task sshd/220 [ 30.196023] [ 30.196246] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.197111] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.198109] Call Trace: [ 30.198430] [ 30.198711] dump_stack_lvl+0x91/0xf0 [ 30.199209] print_report+0xcc/0x620 [ 30.199700] ? __virt_addr_valid+0x102/0x340 [ 30.200288] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.200948] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.201579] kasan_report+0xbe/0xf0 [ 30.202080] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.202707] vma_interval_tree_remove+0xc75/0xec0 [ 30.203349] vma_prepare+0xc54/0x11a0 [ 30.203841] __split_vma+0x5af/0x950 [ 30.204340] ? __pfx___split_vma+0x10/0x10 [ 30.204885] ? find_held_lock+0x2c/0x110 [ 30.205429] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.206013] ? lock_is_held_type+0x9f/0x120 [ 30.206575] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.207190] ? mtree_range_walk+0x632/0x900 [ 30.207758] ? mas_walk+0x5c7/0x7c0 [ 30.208271] do_vmi_munmap+0x1f1/0x2b0 [ 30.208767] mmap_region+0x1f9/0x2660 [ 30.209256] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.209788] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.210526] ? __pfx_lock_acquire+0x10/0x10 [ 30.211075] ? __pfx_mmap_region+0x10/0x10 [ 30.211613] ? security_mmap_addr+0x7d/0xa0 [ 30.212181] ? get_unmapped_area+0x1f5/0x3f0 [ 30.212759] do_mmap+0x854/0xf00 [ 30.213224] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.213738] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.214322] ksys_mmap_pgoff+0x3af/0x500 [ 30.214848] do_syscall_64+0x3f/0x90 [ 30.215340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.216038] RIP: 0033:0x7f04f2fddd82 [ 30.216504] 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 [ 30.218693] RSP: 002b:00007ffe5bf18428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.219615] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f04f2fddd82 [ 30.220486] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f04f2417000 [ 30.221345] RBP: 00007f04f2417000 R08: 0000000000000009 R09: 0000000000001000 [ 30.222193] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dffeb52b20 [ 30.223048] R13: 00007ffe5bf18440 R14: 00007ffe5bf18470 R15: 00007ffe5bf187d0 [ 30.223920] [ 30.224219] [ 30.224438] Allocated by task 213: [ 30.224874] kasan_save_stack+0x22/0x50 [ 30.225384] kasan_set_track+0x25/0x30 [ 30.225886] __kasan_slab_alloc+0x59/0x70 [ 30.226416] kmem_cache_alloc+0x16b/0x370 [ 30.226939] vm_area_dup+0x20/0x160 [ 30.227390] __split_vma+0x170/0x950 [ 30.227890] split_vma+0xc6/0x110 [ 30.228381] mprotect_fixup+0x8d2/0xb30 [ 30.228911] do_mprotect_pkey+0x87e/0xd40 [ 30.229438] __x64_sys_mprotect+0x78/0xc0 [ 30.229986] do_syscall_64+0x3f/0x90 [ 30.230478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.231156] [ 30.231373] Freed by task 213: [ 30.231766] kasan_save_stack+0x22/0x50 [ 30.232303] kasan_set_track+0x25/0x30 [ 30.232810] kasan_save_free_info+0x2b/0x50 [ 30.233372] __kasan_slab_free+0x10a/0x190 [ 30.233911] kmem_cache_free+0x10d/0x4d0 [ 30.234422] rcu_core+0x8c8/0x2860 [ 30.234870] __do_softirq+0x1b7/0x7d4 [ 30.235359] [ 30.235576] Last potentially related work creation: [ 30.236169] kasan_save_stack+0x22/0x50 [ 30.236677] __kasan_record_aux_stack+0x8e/0xa0 [ 30.237261] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.237908] remove_vma+0x139/0x170 [ 30.238362] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.238920] do_vmi_munmap+0x1f1/0x2b0 [ 30.239409] __vm_munmap+0x138/0x3a0 [ 30.239893] __x64_sys_munmap+0x59/0x80 [ 30.240425] do_syscall_64+0x3f/0x90 [ 30.240911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.241567] [ 30.241791] The buggy address belongs to the object at ffff888018363740 [ 30.241791] which belongs to the cache vm_area_struct of size 168 [ 30.243315] The buggy address is located 88 bytes inside of [ 30.243315] freed 168-byte region [ffff888018363740, ffff8880183637e8) [ 30.244773] [ 30.244990] The buggy address belongs to the physical page: [ 30.245663] page:00000000b4ba03f0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18363 [ 30.246776] memcg:ffff88800ee33a01 [ 30.247219] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.247876] page_type: 0xffffffff() [ 30.248349] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.249309] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee33a01 [ 30.250239] page dumped because: kasan: bad access detected [ 30.250915] [ 30.251129] Memory state around the buggy address: [ 30.251705] ffff888018363680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.252583] ffff888018363700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.253446] >ffff888018363780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.254296] ^ [ 30.254790] ffff888018363800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.255643] ffff888018363880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.256500] ================================================================== [ 30.257487] Disabling lock debugging due to kernel taint [ 32.212688] BUG: Bad rss-counter state mm:00000000d1ecf621 type:MM_FILEPAGES val:33 [ 32.213866] BUG: Bad rss-counter state mm:00000000d1ecf621 type:MM_ANONPAGES val:22 [ 32.624769] BUG: Bad rss-counter state mm:000000009948532d type:MM_FILEPAGES val:33 [ 32.625818] BUG: Bad rss-counter state mm:000000009948532d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41031' (ECDSA) to the list of known hosts. 2023/06/20 17:23:58 fuzzer started 2023/06/20 17:23:58 dialing manager at localhost:36067 2023/06/20 17:23:58 checking machine... 2023/06/20 17:23:58 checking revisions... [ 33.323310] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:23:58 testing simple program... [ 33.372198] cgroup: Unknown subsys name 'net' [ 33.412252] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:23:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=1ffff110028e0eb4 RDX=dffffc0000000000 RSI=ffffffff83641c44 RDI=ffff888014707548 RBP=ffff8880147075a0 RSP=ffff8880147074d8 R8 =0000000000000001 R9 =ffff888014707588 R10=0000000000038001 R11=000000000008ab47 R12=ffff8880147075a8 R13=ffff888014707590 R14=ffff888014707589 R15=ffff888014707548 RIP=ffffffff81130706 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 00007f60596b0900 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=00007f6059c67618 CR3=000000000ed3c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007f2c74ae8510 CR3=00000000147d0000 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=2037353a33323a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a33323a3731203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000