syzkaller login: [ 31.082733] BUG: Bad rss-counter state mm:000000009e944758 type:MM_FILEPAGES val:33 [ 31.083897] BUG: Bad rss-counter state mm:000000009e944758 type:MM_ANONPAGES val:22 [ 31.215443] ================================================================== [ 31.216159] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.216888] Read of size 8 at addr ffff8880181d1c20 by task sshd/220 [ 31.217475] [ 31.217640] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.218302] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.219050] Call Trace: [ 31.219382] [ 31.219598] dump_stack_lvl+0x91/0xf0 [ 31.220021] print_report+0xcc/0x620 [ 31.220471] ? __virt_addr_valid+0x102/0x340 [ 31.220917] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.221480] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.222040] kasan_report+0xbe/0xf0 [ 31.222414] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.222952] vma_interval_tree_remove+0xc75/0xec0 [ 31.223511] vma_prepare+0xc54/0x11a0 [ 31.223927] __split_vma+0x5af/0x950 [ 31.224319] ? __pfx___split_vma+0x10/0x10 [ 31.224732] ? find_held_lock+0x2c/0x110 [ 31.225132] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.225566] ? lock_is_held_type+0x9f/0x120 [ 31.225983] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.226448] ? mtree_range_walk+0x632/0x900 [ 31.226876] ? mas_walk+0x5c7/0x7c0 [ 31.227239] do_vmi_munmap+0x1f1/0x2b0 [ 31.227624] mmap_region+0x1f9/0x2660 [ 31.227994] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.228389] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.228947] ? __pfx_lock_acquire+0x10/0x10 [ 31.229365] ? __pfx_mmap_region+0x10/0x10 [ 31.229772] ? security_mmap_addr+0x7d/0xa0 [ 31.230181] ? get_unmapped_area+0x1f5/0x3f0 [ 31.230604] do_mmap+0x854/0xf00 [ 31.230947] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.231330] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.231761] ksys_mmap_pgoff+0x3af/0x500 [ 31.232153] do_syscall_64+0x3f/0x90 [ 31.232520] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.233037] RIP: 0033:0x7f275a70dd82 [ 31.233391] 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 [ 31.235033] RSP: 002b:00007ffc60da13a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.235730] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f275a70dd82 [ 31.236386] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2759b47000 [ 31.237035] RBP: 00007f2759b47000 R08: 0000000000000009 R09: 0000000000001000 [ 31.237700] R10: 0000000000000812 R11: 0000000000000206 R12: 000056024ad73ec0 [ 31.238360] R13: 00007ffc60da13c0 R14: 00007ffc60da13f0 R15: 00007ffc60da1750 [ 31.239021] [ 31.239249] [ 31.239418] Allocated by task 213: [ 31.239747] kasan_save_stack+0x22/0x50 [ 31.240140] kasan_set_track+0x25/0x30 [ 31.240518] __kasan_slab_alloc+0x59/0x70 [ 31.240937] kmem_cache_alloc+0x16b/0x370 [ 31.241331] vm_area_dup+0x20/0x160 [ 31.241679] __split_vma+0x170/0x950 [ 31.242035] split_vma+0xc6/0x110 [ 31.242372] mprotect_fixup+0x8d2/0xb30 [ 31.242756] do_mprotect_pkey+0x87e/0xd40 [ 31.243160] __x64_sys_mprotect+0x78/0xc0 [ 31.243565] do_syscall_64+0x3f/0x90 [ 31.243931] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.244426] [ 31.244596] Freed by task 13: [ 31.244896] kasan_save_stack+0x22/0x50 [ 31.245282] kasan_set_track+0x25/0x30 [ 31.245660] kasan_save_free_info+0x2b/0x50 [ 31.246070] __kasan_slab_free+0x10a/0x190 [ 31.246478] kmem_cache_free+0x10d/0x4d0 [ 31.246869] rcu_core+0x8c8/0x2860 [ 31.247212] __do_softirq+0x1b7/0x7d4 [ 31.247583] [ 31.247746] Last potentially related work creation: [ 31.248204] kasan_save_stack+0x22/0x50 [ 31.248598] __kasan_record_aux_stack+0x8e/0xa0 [ 31.249040] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.249543] remove_vma+0x139/0x170 [ 31.249889] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.250316] do_vmi_munmap+0x1f1/0x2b0 [ 31.250693] __vm_munmap+0x138/0x3a0 [ 31.251052] __x64_sys_munmap+0x59/0x80 [ 31.251435] do_syscall_64+0x3f/0x90 [ 31.251799] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.252297] [ 31.252462] Second to last potentially related work creation: [ 31.253001] kasan_save_stack+0x22/0x50 [ 31.253382] __kasan_record_aux_stack+0x8e/0xa0 [ 31.253820] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.254319] remove_vma+0x139/0x170 [ 31.254668] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.255093] do_vmi_munmap+0x1f1/0x2b0 [ 31.255469] mmap_region+0x1f9/0x2660 [ 31.255834] do_mmap+0x854/0xf00 [ 31.256163] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.256537] ksys_mmap_pgoff+0x3af/0x500 [ 31.256931] do_syscall_64+0x3f/0x90 [ 31.257295] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.257792] [ 31.257956] The buggy address belongs to the object at ffff8880181d1bc8 [ 31.257956] which belongs to the cache vm_area_struct of size 168 [ 31.259085] The buggy address is located 88 bytes inside of [ 31.259085] freed 168-byte region [ffff8880181d1bc8, ffff8880181d1c70) [ 31.260168] [ 31.260333] The buggy address belongs to the physical page: [ 31.260846] page:0000000054b69a73 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x181d1 [ 31.261687] memcg:ffff88801a077701 [ 31.262016] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.262558] page_type: 0xffffffff() [ 31.262906] raw: 0100000000000200 ffff8880087a0c80 ffffea00005af280 0000000000000005 [ 31.263616] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a077701 [ 31.264317] page dumped because: kasan: bad access detected [ 31.264841] [ 31.265004] Memory state around the buggy address: [ 31.265450] ffff8880181d1b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.266108] ffff8880181d1b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.266764] >ffff8880181d1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.267426] ^ [ 31.267830] ffff8880181d1c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.268487] ffff8880181d1d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.269148] ================================================================== [ 31.269887] Disabling lock debugging due to kernel taint [ 33.808375] BUG: Bad rss-counter state mm:00000000178d3c4f type:MM_FILEPAGES val:33 [ 33.810161] BUG: Bad rss-counter state mm:00000000178d3c4f type:MM_ANONPAGES val:22 [ 34.222129] BUG: Bad rss-counter state mm:0000000098fdc6a6 type:MM_FILEPAGES val:33 [ 34.223170] BUG: Bad rss-counter state mm:0000000098fdc6a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7357' (ECDSA) to the list of known hosts. 2023/06/20 21:02:50 fuzzer started 2023/06/20 21:02:50 dialing manager at localhost:36067 2023/06/20 21:02:50 checking machine... 2023/06/20 21:02:50 checking revisions... [ 34.950159] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:02:50 testing simple program... [ 35.003418] cgroup: Unknown subsys name 'net' [ 35.051631] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:02:50 Registers: info registers vcpu 0 RAX=ffffea0000324f80 RBX=ffff88800c93ea00 RCX=ffffea0000324f01 RDX=ffff88808c93ea00 RSI=ffff88800e7d41a0 RDI=ffff8880087b23c0 RBP=0000000000000000 RSP=ffff888016da7808 R8 =ffff88800c93ea00 R9 =0000000000000000 R10=ffffea000039f500 R11=0000000000800002 R12=dffffc0000000000 R13=ffff888016da7848 R14=0000000000000000 R15=ffff88800e7d41a0 RIP=ffffffff81810393 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 00007fb11a364900 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=00007fb11a919650 CR3=000000001a1f0000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff836827e8 RBX=ffffffff85fa8e84 RCX=ffffffff836827d8 RDX=0000000000000000 RSI=ffffffff863b941c RDI=ffffffff85fa8e7c RBP=ffffffff85fa8e7c RSP=ffff8880180cf490 R8 =ffffffff863b941c R9 =ffff8880180cf588 R10=0000000000038001 R11=000000000008b92e R12=ffffffff85fa8e80 R13=ffffffff85fa8e7c R14=ffffffff85fa8e7c R15=dffffc0000000000 RIP=ffffffff8112fca2 RFL=00000212 [----A--] 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 00007f79f7283700 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=00007f1522dfcb28 CR3=0000000016cc2000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732039343a3230 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383638 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000