syzkaller login: [ 61.216268] BUG: Bad rss-counter state mm:00000000198d9d64 type:MM_FILEPAGES val:33 [ 61.217606] BUG: Bad rss-counter state mm:00000000198d9d64 type:MM_ANONPAGES val:22 [ 61.369946] ================================================================== [ 61.370874] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.371811] Read of size 8 at addr ffff888013db2798 by task sshd/219 [ 61.372763] [ 61.373013] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.373900] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.374911] Call Trace: [ 61.375248] [ 61.375554] dump_stack_lvl+0x91/0xf0 [ 61.376074] print_report+0xcc/0x620 [ 61.376575] ? __virt_addr_valid+0x102/0x340 [ 61.377184] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.377816] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.378454] kasan_report+0xbe/0xf0 [ 61.378944] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.379591] vma_interval_tree_remove+0xc75/0xec0 [ 61.380226] vma_prepare+0xc54/0x11a0 [ 61.380887] __split_vma+0x5af/0x950 [ 61.381452] ? __pfx___split_vma+0x10/0x10 [ 61.382010] ? find_held_lock+0x2c/0x110 [ 61.382559] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.383146] ? lock_is_held_type+0x9f/0x120 [ 61.383719] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.384387] ? mtree_range_walk+0x632/0x900 [ 61.384999] ? mas_walk+0x5c7/0x7c0 [ 61.385520] do_vmi_munmap+0x1f1/0x2b0 [ 61.386045] mmap_region+0x1f9/0x2660 [ 61.386551] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.387097] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.387843] ? __pfx_lock_acquire+0x10/0x10 [ 61.388442] ? __pfx_mmap_region+0x10/0x10 [ 61.389034] ? security_mmap_addr+0x7d/0xa0 [ 61.389595] ? get_unmapped_area+0x1f5/0x3f0 [ 61.390180] do_mmap+0x854/0xf00 [ 61.390640] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.391149] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.391733] ksys_mmap_pgoff+0x3af/0x500 [ 61.392272] do_syscall_64+0x3f/0x90 [ 61.392925] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.393600] RIP: 0033:0x7fc45ea2cd82 [ 61.394085] 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 [ 61.396283] RSP: 002b:00007ffc192bafd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.397209] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc45ea2cd82 [ 61.398128] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc45de66000 [ 61.399099] RBP: 00007fc45de66000 R08: 0000000000000009 R09: 0000000000001000 [ 61.399958] R10: 0000000000000812 R11: 0000000000000206 R12: 00005560e0b94b20 [ 61.400814] R13: 00007ffc192baff0 R14: 00007ffc192bb020 R15: 00007ffc192bb380 [ 61.401681] [ 61.401970] [ 61.402185] Allocated by task 212: [ 61.402620] kasan_save_stack+0x22/0x50 [ 61.403123] kasan_set_track+0x25/0x30 [ 61.403617] __kasan_slab_alloc+0x59/0x70 [ 61.404142] kmem_cache_alloc+0x16b/0x370 [ 61.404656] vm_area_dup+0x20/0x160 [ 61.405130] __split_vma+0x170/0x950 [ 61.405594] split_vma+0xc6/0x110 [ 61.406096] mprotect_fixup+0x8d2/0xb30 [ 61.406733] do_mprotect_pkey+0x87e/0xd40 [ 61.407276] __x64_sys_mprotect+0x78/0xc0 [ 61.407795] do_syscall_64+0x3f/0x90 [ 61.408274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.408925] [ 61.409139] Freed by task 212: [ 61.409532] kasan_save_stack+0x22/0x50 [ 61.410028] kasan_set_track+0x25/0x30 [ 61.410515] kasan_save_free_info+0x2b/0x50 [ 61.411046] __kasan_slab_free+0x10a/0x190 [ 61.411574] kmem_cache_free+0x10d/0x4d0 [ 61.412100] rcu_core+0x8c8/0x2860 [ 61.412596] __do_softirq+0x1b7/0x7d4 [ 61.413081] [ 61.413298] Last potentially related work creation: [ 61.413946] kasan_save_stack+0x22/0x50 [ 61.414604] __kasan_record_aux_stack+0x8e/0xa0 [ 61.415200] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.415841] remove_vma+0x139/0x170 [ 61.416292] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.416843] do_vmi_munmap+0x1f1/0x2b0 [ 61.417346] __vm_munmap+0x138/0x3a0 [ 61.417848] __x64_sys_munmap+0x59/0x80 [ 61.418370] do_syscall_64+0x3f/0x90 [ 61.418846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.419491] [ 61.419708] The buggy address belongs to the object at ffff888013db2740 [ 61.419708] which belongs to the cache vm_area_struct of size 168 [ 61.421176] The buggy address is located 88 bytes inside of [ 61.421176] freed 168-byte region [ffff888013db2740, ffff888013db27e8) [ 61.422555] [ 61.422771] The buggy address belongs to the physical page: [ 61.423424] page:0000000048ea9c61 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13db2 [ 61.424656] memcg:ffff88801476ef01 [ 61.425139] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.425774] page_type: 0xffffffff() [ 61.426220] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.427154] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801476ef01 [ 61.428063] page dumped because: kasan: bad access detected [ 61.428718] [ 61.428944] Memory state around the buggy address: [ 61.429525] ffff888013db2680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.430370] ffff888013db2700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 61.431226] >ffff888013db2780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 61.432083] ^ [ 61.432650] ffff888013db2800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 61.433516] ffff888013db2880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 61.434543] ================================================================== [ 61.435493] Disabling lock debugging due to kernel taint [ 63.427981] BUG: Bad rss-counter state mm:000000006fd7973a type:MM_FILEPAGES val:33 [ 63.428995] BUG: Bad rss-counter state mm:000000006fd7973a type:MM_ANONPAGES val:22 [ 63.906175] BUG: Bad rss-counter state mm:00000000d38f56af type:MM_FILEPAGES val:33 [ 63.907054] BUG: Bad rss-counter state mm:00000000d38f56af type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22994' (ECDSA) to the list of known hosts. 2023/06/20 11:57:30 fuzzer started 2023/06/20 11:57:31 dialing manager at localhost:36067 2023/06/20 11:57:31 checking machine... 2023/06/20 11:57:31 checking revisions... [ 64.644633] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:57:31 testing simple program... [ 64.693320] cgroup: Unknown subsys name 'net' [ 64.731332] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:57:30 Registers: info registers vcpu 0 RAX=ffffffff863b2e4b RBX=0000000000000001 RCX=ffffffff863b2e46 RDX=dffffc0000000000 RSI=0000000000000000 RDI=1ffffffff0c765c9 RBP=ffff88800ead73e0 RSP=ffff88800ead7318 R8 =ffffffff863b2e4a R9 =ffff88800ead73c8 R10=0000000000038001 R11=000000000008a835 R12=ffff88800ead73e8 R13=ffff88800ead73d0 R14=ffff88800ead73c9 R15=ffff88800ead7388 RIP=ffffffff81130aa4 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 00007f93e34b8900 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=00007f93e3a6f618 CR3=0000000019aa2000 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=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=00007f6530824a80 CR3=000000000e77a000 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=3121bc39338691ae174d2a01f4e823de XMM02=000000000011a910ec2efd57dc4c00df XMM03=0000000000121e502129dd45970b138e XMM04=ea09f066607948ed00000000000ae988 XMM05=dfcdbad4f1609c370000000000131d18 XMM06=806171799158d9670000000000131ba0 XMM07=e042d86d42eb936e00000000001220d0 XMM08=2129dd45970b138e000000000011a970 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000