syzkaller login: [ 31.387432] BUG: Bad rss-counter state mm:00000000d8b7588a type:MM_FILEPAGES val:33 [ 31.388303] BUG: Bad rss-counter state mm:00000000d8b7588a type:MM_ANONPAGES val:22 [ 31.484016] ================================================================== [ 31.484748] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.485391] Read of size 8 at addr ffff88801a3705c8 by task sshd/220 [ 31.485926] [ 31.486081] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.486688] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.487365] Call Trace: [ 31.487589] [ 31.487787] dump_stack_lvl+0x91/0xf0 [ 31.488127] print_report+0xcc/0x620 [ 31.488694] ? __virt_addr_valid+0x102/0x340 [ 31.489082] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.489512] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.489936] kasan_report+0xbe/0xf0 [ 31.490268] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.490724] vma_interval_tree_remove+0xc75/0xec0 [ 31.491151] vma_prepare+0xc54/0x11a0 [ 31.491483] __split_vma+0x5af/0x950 [ 31.491817] ? __pfx___split_vma+0x10/0x10 [ 31.492182] ? find_held_lock+0x2c/0x110 [ 31.492542] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.492986] ? lock_is_held_type+0x9f/0x120 [ 31.493394] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.493816] ? mtree_range_walk+0x632/0x900 [ 31.494194] ? mas_walk+0x5c7/0x7c0 [ 31.494525] do_vmi_munmap+0x1f1/0x2b0 [ 31.494871] mmap_region+0x1f9/0x2660 [ 31.495203] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.495575] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.496080] ? __pfx_lock_acquire+0x10/0x10 [ 31.496442] ? __pfx_mmap_region+0x10/0x10 [ 31.496905] ? security_mmap_addr+0x7d/0xa0 [ 31.497268] ? get_unmapped_area+0x1f5/0x3f0 [ 31.497658] do_mmap+0x854/0xf00 [ 31.497967] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.498321] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.498713] ksys_mmap_pgoff+0x3af/0x500 [ 31.499081] do_syscall_64+0x3f/0x90 [ 31.499427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.499891] RIP: 0033:0x7fa12ad0dd82 [ 31.500207] 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 [ 31.501751] RSP: 002b:00007ffd185b3df8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.502394] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa12ad0dd82 [ 31.502994] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa12a147000 [ 31.503591] RBP: 00007fa12a147000 R08: 0000000000000009 R09: 0000000000001000 [ 31.504181] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562856554ec0 [ 31.504814] R13: 00007ffd185b3e10 R14: 00007ffd185b3e40 R15: 00007ffd185b41a0 [ 31.505421] [ 31.505625] [ 31.505781] Allocated by task 213: [ 31.506094] kasan_save_stack+0x22/0x50 [ 31.506465] kasan_set_track+0x25/0x30 [ 31.506822] __kasan_slab_alloc+0x59/0x70 [ 31.507193] kmem_cache_alloc+0x16b/0x370 [ 31.507556] vm_area_dup+0x20/0x160 [ 31.507888] __split_vma+0x170/0x950 [ 31.508219] split_vma+0xc6/0x110 [ 31.508530] mprotect_fixup+0x8d2/0xb30 [ 31.508935] do_mprotect_pkey+0x87e/0xd40 [ 31.509302] __x64_sys_mprotect+0x78/0xc0 [ 31.509667] do_syscall_64+0x3f/0x90 [ 31.510006] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.510468] [ 31.510619] Freed by task 213: [ 31.510898] kasan_save_stack+0x22/0x50 [ 31.511251] kasan_set_track+0x25/0x30 [ 31.511604] kasan_save_free_info+0x2b/0x50 [ 31.511982] __kasan_slab_free+0x10a/0x190 [ 31.512364] kmem_cache_free+0x10d/0x4d0 [ 31.512736] rcu_core+0x8c8/0x2860 [ 31.513050] __do_softirq+0x1b7/0x7d4 [ 31.513390] [ 31.513541] Last potentially related work creation: [ 31.513958] kasan_save_stack+0x22/0x50 [ 31.514323] __kasan_record_aux_stack+0x8e/0xa0 [ 31.514731] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.515179] remove_vma+0x139/0x170 [ 31.515506] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.515909] do_vmi_munmap+0x1f1/0x2b0 [ 31.516251] __vm_munmap+0x138/0x3a0 [ 31.516583] __x64_sys_munmap+0x59/0x80 [ 31.516984] do_syscall_64+0x3f/0x90 [ 31.517323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.517780] [ 31.517936] The buggy address belongs to the object at ffff88801a370570 [ 31.517936] which belongs to the cache vm_area_struct of size 168 [ 31.518972] The buggy address is located 88 bytes inside of [ 31.518972] freed 168-byte region [ffff88801a370570, ffff88801a370618) [ 31.519964] [ 31.520123] The buggy address belongs to the physical page: [ 31.520592] page:00000000ba1b584d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a370 [ 31.521385] memcg:ffff888019ec9901 [ 31.521684] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.522158] page_type: 0xffffffff() [ 31.522481] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.523124] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ec9901 [ 31.523752] page dumped because: kasan: bad access detected [ 31.524228] [ 31.524382] Memory state around the buggy address: [ 31.524839] ffff88801a370480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.525442] ffff88801a370500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.526052] >ffff88801a370580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.526644] ^ [ 31.527125] ffff88801a370600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.527729] ffff88801a370680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.528332] ================================================================== [ 31.529284] Disabling lock debugging due to kernel taint [ 32.907495] BUG: Bad rss-counter state mm:000000000d868aab type:MM_FILEPAGES val:33 [ 32.908246] BUG: Bad rss-counter state mm:000000000d868aab type:MM_ANONPAGES val:22 [ 33.290437] BUG: Bad rss-counter state mm:00000000841c1f03 type:MM_FILEPAGES val:33 [ 33.291095] BUG: Bad rss-counter state mm:00000000841c1f03 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41201' (ECDSA) to the list of known hosts. 2023/06/21 08:32:42 fuzzer started 2023/06/21 08:32:42 dialing manager at localhost:36067 2023/06/21 08:32:42 checking machine... 2023/06/21 08:32:42 checking revisions... [ 33.855771] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:32:43 testing simple program... [ 33.891683] cgroup: Unknown subsys name 'net' [ 33.948158] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:32:42 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff8880164cf6a8 RCX=ffffffff86138e01 RDX=1ffff11002c99ee0 RSI=0000000000000000 RDI=ffffffff8180c705 RBP=ffff8880164cf700 RSP=ffff8880164cf688 R8 =ffffffff86138e90 R9 =ffff8880164cf6e8 R10=0000000000038001 R11=0000000000020d8f R12=ffff8880164cf770 R13=0000000000000000 R14=ffff8880166a51c0 R15=0000000000000001 RIP=ffffffff811fc8a2 RFL=00000202 [-------] 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 00007f1c3e920900 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=00007ffcd7cca000 CR3=0000000016426000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007f4905d3ae00 CR3=000000000f72c000 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=35028bfeca90b0ac7e47b850d93bd115 XMM02=2c67c8bc2e329bc3000000000011b310 XMM03=fb795ef6d657705600000000001220b8 XMM04=95044d308720972a00000000000ae988 XMM05=19e9129bd510f2350000000000131e88 XMM06=eca4c79aeae7f3150000000000130cf0 XMM07=e042d86d42eb936e0000000000122338 XMM08=b5732e64ba513416000000000011b370 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000