syzkaller login: [ 38.730949] BUG: Bad rss-counter state mm:000000004844ba09 type:MM_FILEPAGES val:33 [ 38.732488] BUG: Bad rss-counter state mm:000000004844ba09 type:MM_ANONPAGES val:22 [ 38.908423] ================================================================== [ 38.909416] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.910417] Read of size 8 at addr ffff88800d4e8968 by task sshd/219 [ 38.911237] [ 38.911629] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.912547] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.913599] Call Trace: [ 38.913950] [ 38.914253] dump_stack_lvl+0x91/0xf0 [ 38.914783] print_report+0xcc/0x620 [ 38.915299] ? __virt_addr_valid+0x102/0x340 [ 38.915884] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.916541] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.917206] kasan_report+0xbe/0xf0 [ 38.917718] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.918384] vma_interval_tree_remove+0xc75/0xec0 [ 38.919031] vma_prepare+0xc54/0x11a0 [ 38.919545] __split_vma+0x5af/0x950 [ 38.920052] ? __pfx___split_vma+0x10/0x10 [ 38.920621] ? find_held_lock+0x2c/0x110 [ 38.921189] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.921793] ? lock_is_held_type+0x9f/0x120 [ 38.922370] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.923021] ? mtree_range_walk+0x632/0x900 [ 38.923616] ? mas_walk+0x5c7/0x7c0 [ 38.924130] do_vmi_munmap+0x1f1/0x2b0 [ 38.924679] mmap_region+0x1f9/0x2660 [ 38.925204] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.925758] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.926522] ? __pfx_lock_acquire+0x10/0x10 [ 38.927096] ? __pfx_mmap_region+0x10/0x10 [ 38.927668] ? security_mmap_addr+0x7d/0xa0 [ 38.928236] ? get_unmapped_area+0x1f5/0x3f0 [ 38.928841] do_mmap+0x854/0xf00 [ 38.929316] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.929844] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.930445] ksys_mmap_pgoff+0x3af/0x500 [ 38.930989] do_syscall_64+0x3f/0x90 [ 38.931505] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.932200] RIP: 0033:0x7fe11458dd82 [ 38.932695] 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 [ 38.934970] RSP: 002b:00007ffdd4696478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.935933] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe11458dd82 [ 38.936859] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe1139c7000 [ 38.937769] RBP: 00007fe1139c7000 R08: 0000000000000009 R09: 0000000000001000 [ 38.938674] R10: 0000000000000812 R11: 0000000000000206 R12: 00005570b60e4ec0 [ 38.939570] R13: 00007ffdd4696490 R14: 00007ffdd46964c0 R15: 00007ffdd4696820 [ 38.940489] [ 38.940816] [ 38.941048] Allocated by task 212: [ 38.941513] kasan_save_stack+0x22/0x50 [ 38.942061] kasan_set_track+0x25/0x30 [ 38.942586] __kasan_slab_alloc+0x59/0x70 [ 38.943144] kmem_cache_alloc+0x16b/0x370 [ 38.943699] vm_area_dup+0x20/0x160 [ 38.944185] __split_vma+0x170/0x950 [ 38.944689] split_vma+0xc6/0x110 [ 38.945162] mprotect_fixup+0x8d2/0xb30 [ 38.945711] do_mprotect_pkey+0x87e/0xd40 [ 38.946265] __x64_sys_mprotect+0x78/0xc0 [ 38.946825] do_syscall_64+0x3f/0x90 [ 38.947331] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.948013] [ 38.948243] Freed by task 203: [ 38.948682] kasan_save_stack+0x22/0x50 [ 38.949227] kasan_set_track+0x25/0x30 [ 38.949755] kasan_save_free_info+0x2b/0x50 [ 38.950320] __kasan_slab_free+0x10a/0x190 [ 38.950890] kmem_cache_free+0x10d/0x4d0 [ 38.951429] rcu_core+0x8c8/0x2860 [ 38.951901] __do_softirq+0x1b7/0x7d4 [ 38.952410] [ 38.952641] Last potentially related work creation: [ 38.953365] kasan_save_stack+0x22/0x50 [ 38.953901] __kasan_record_aux_stack+0x8e/0xa0 [ 38.954514] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.955207] remove_vma+0x139/0x170 [ 38.955690] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.956285] do_vmi_munmap+0x1f1/0x2b0 [ 38.956828] __vm_munmap+0x138/0x3a0 [ 38.957319] __x64_sys_munmap+0x59/0x80 [ 38.957849] do_syscall_64+0x3f/0x90 [ 38.958354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.959037] [ 38.959264] Second to last potentially related work creation: [ 38.959993] kasan_save_stack+0x22/0x50 [ 38.960521] __kasan_record_aux_stack+0x8e/0xa0 [ 38.961144] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.961828] remove_vma+0x139/0x170 [ 38.962309] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.962895] do_vmi_munmap+0x1f1/0x2b0 [ 38.963405] mmap_region+0x1f9/0x2660 [ 38.963913] do_mmap+0x854/0xf00 [ 38.964369] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.964897] ksys_mmap_pgoff+0x3af/0x500 [ 38.965430] do_syscall_64+0x3f/0x90 [ 38.965937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.966619] [ 38.966848] The buggy address belongs to the object at ffff88800d4e8910 [ 38.966848] which belongs to the cache vm_area_struct of size 168 [ 38.968407] The buggy address is located 88 bytes inside of [ 38.968407] freed 168-byte region [ffff88800d4e8910, ffff88800d4e89b8) [ 38.969934] [ 38.970168] The buggy address belongs to the physical page: [ 38.970867] page:00000000ca5ce18a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd4e8 [ 38.972016] memcg:ffff88800e945001 [ 38.972466] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.973162] page_type: 0xffffffff() [ 38.973637] raw: 0100000000000200 ffff8880087a0c80 ffffea000038ec00 dead000000000002 [ 38.974611] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e945001 [ 38.975573] page dumped because: kasan: bad access detected [ 38.976272] [ 38.976502] Memory state around the buggy address: [ 38.977134] ffff88800d4e8800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.978047] ffff88800d4e8880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.978958] >ffff88800d4e8900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.979869] ^ [ 38.980705] ffff88800d4e8980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.981622] ffff88800d4e8a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.982534] ================================================================== [ 38.983571] Disabling lock debugging due to kernel taint [ 41.668561] BUG: Bad rss-counter state mm:000000008e7d57a7 type:MM_FILEPAGES val:33 [ 41.669514] BUG: Bad rss-counter state mm:000000008e7d57a7 type:MM_ANONPAGES val:22 [ 42.171566] BUG: Bad rss-counter state mm:0000000084684ba4 type:MM_FILEPAGES val:33 [ 42.172756] BUG: Bad rss-counter state mm:0000000084684ba4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62338' (ECDSA) to the list of known hosts. 2023/06/21 06:46:57 fuzzer started 2023/06/21 06:46:58 dialing manager at localhost:36067 2023/06/21 06:46:58 checking machine... 2023/06/21 06:46:58 checking revisions... [ 42.928560] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:46:58 testing simple program... [ 42.978058] cgroup: Unknown subsys name 'net' [ 43.017467] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:46:57 Registers: info registers vcpu 0 RAX=ffff888016578001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016577801 RSI=ffff888016577878 RDI=ffff888016577530 RBP=ffff888016577878 RSP=ffff888016577488 R8 =0000000000000001 R9 =ffff888016577560 R10=0000000000038001 R11=0000000000020ed2 R12=0000000000000008 R13=ffff888016570000 R14=ffff888016577878 R15=ffff888016577520 RIP=ffffffff811304ce RFL=00000292 [--S-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 00007f5d4c861700 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=00007fffeb331b78 CR3=000000000dc5c000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732037353a3634 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343132 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=0000000000000000 RBX=ffff888008ee7c00 RCX=ffffffff83c56c3d RDX=ffff888017e23680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800f1d0ec0 RSP=ffff88801471f4a0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000080 R11=00000000000b6a61 R12=ffff88801671c3c0 R13=ffff888008ee7c6c R14=0000000000000080 R15=ffff888008ee7c28 RIP=ffffffff814c0860 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 00007f5c672a3900 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=00007f5c6785a618 CR3=000000000e680000 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=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