syzkaller login: [ 30.731351] BUG: Bad rss-counter state mm:000000008b99a671 type:MM_FILEPAGES val:33 [ 30.732593] BUG: Bad rss-counter state mm:000000008b99a671 type:MM_ANONPAGES val:22 [ 30.901941] ================================================================== [ 30.903039] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.904148] Read of size 8 at addr ffff88800d9093f8 by task sshd/220 [ 30.905202] [ 30.905491] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.906514] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.907709] Call Trace: [ 30.908087] [ 30.908426] dump_stack_lvl+0x91/0xf0 [ 30.909002] print_report+0xcc/0x620 [ 30.909595] ? __virt_addr_valid+0x102/0x340 [ 30.910244] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.910972] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.911706] kasan_report+0xbe/0xf0 [ 30.912268] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.913002] vma_interval_tree_remove+0xc75/0xec0 [ 30.913732] vma_prepare+0xc54/0x11a0 [ 30.914298] __split_vma+0x5af/0x950 [ 30.914866] ? __pfx___split_vma+0x10/0x10 [ 30.915494] ? find_held_lock+0x2c/0x110 [ 30.916110] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.916782] ? lock_is_held_type+0x9f/0x120 [ 30.917447] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.918175] ? mtree_range_walk+0x632/0x900 [ 30.918826] ? mas_walk+0x5c7/0x7c0 [ 30.919389] do_vmi_munmap+0x1f1/0x2b0 [ 30.919982] mmap_region+0x1f9/0x2660 [ 30.920555] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.921163] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.922032] ? __pfx_lock_acquire+0x10/0x10 [ 30.922664] ? __pfx_mmap_region+0x10/0x10 [ 30.923292] ? security_mmap_addr+0x7d/0xa0 [ 30.923927] ? get_unmapped_area+0x1f5/0x3f0 [ 30.924585] do_mmap+0x854/0xf00 [ 30.925111] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.925724] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.926395] ksys_mmap_pgoff+0x3af/0x500 [ 30.926998] do_syscall_64+0x3f/0x90 [ 30.927566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.928296] RIP: 0033:0x7f1bf6cf2d82 [ 30.928791] 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 [ 30.931095] RSP: 002b:00007ffd890cf848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.932075] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1bf6cf2d82 [ 30.933003] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1bf612c000 [ 30.933997] RBP: 00007f1bf612c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.934991] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a266f7bec0 [ 30.935987] R13: 00007ffd890cf860 R14: 00007ffd890cf890 R15: 00007ffd890cfbf0 [ 30.936997] [ 30.937371] [ 30.937616] Allocated by task 213: [ 30.938120] kasan_save_stack+0x22/0x50 [ 30.938711] kasan_set_track+0x25/0x30 [ 30.939290] __kasan_slab_alloc+0x59/0x70 [ 30.939907] kmem_cache_alloc+0x16b/0x370 [ 30.940512] vm_area_dup+0x20/0x160 [ 30.941040] __split_vma+0x170/0x950 [ 30.941607] split_vma+0xc6/0x110 [ 30.942128] mprotect_fixup+0x8d2/0xb30 [ 30.942720] do_mprotect_pkey+0x87e/0xd40 [ 30.943327] __x64_sys_mprotect+0x78/0xc0 [ 30.943951] do_syscall_64+0x3f/0x90 [ 30.944499] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.945260] [ 30.945519] Freed by task 13: [ 30.946056] kasan_save_stack+0x22/0x50 [ 30.946633] kasan_set_track+0x25/0x30 [ 30.947217] kasan_save_free_info+0x2b/0x50 [ 30.947844] __kasan_slab_free+0x10a/0x190 [ 30.948471] kmem_cache_free+0x10d/0x4d0 [ 30.949067] rcu_core+0x8c8/0x2860 [ 30.949601] __do_softirq+0x1b7/0x7d4 [ 30.950164] [ 30.950416] Last potentially related work creation: [ 30.951102] kasan_save_stack+0x22/0x50 [ 30.951694] __kasan_record_aux_stack+0x8e/0xa0 [ 30.952355] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.953111] remove_vma+0x139/0x170 [ 30.953661] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.954313] do_vmi_munmap+0x1f1/0x2b0 [ 30.954886] __vm_munmap+0x138/0x3a0 [ 30.955435] __x64_sys_munmap+0x59/0x80 [ 30.956014] do_syscall_64+0x3f/0x90 [ 30.956569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.957341] [ 30.957597] The buggy address belongs to the object at ffff88800d9093a0 [ 30.957597] which belongs to the cache vm_area_struct of size 168 [ 30.959318] The buggy address is located 88 bytes inside of [ 30.959318] freed 168-byte region [ffff88800d9093a0, ffff88800d909448) [ 30.960955] [ 30.961206] The buggy address belongs to the physical page: [ 30.962000] page:00000000dbdcd23f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd909 [ 30.963291] memcg:ffff888019e78601 [ 30.963786] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.964548] page_type: 0xffffffff() [ 30.965070] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.966181] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e78601 [ 30.967239] page dumped because: kasan: bad access detected [ 30.968021] [ 30.968275] Memory state around the buggy address: [ 30.968952] ffff88800d909280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.969968] ffff88800d909300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.970975] >ffff88800d909380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.971987] ^ [ 30.972979] ffff88800d909400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.974042] ffff88800d909480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.975049] ================================================================== [ 30.976377] Disabling lock debugging due to kernel taint [ 33.672995] BUG: Bad rss-counter state mm:00000000c555683a type:MM_FILEPAGES val:33 [ 33.674020] BUG: Bad rss-counter state mm:00000000c555683a type:MM_ANONPAGES val:22 [ 34.171503] BUG: Bad rss-counter state mm:0000000095f2b82b type:MM_FILEPAGES val:33 [ 34.172472] BUG: Bad rss-counter state mm:0000000095f2b82b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22200' (ECDSA) to the list of known hosts. 2023/06/19 11:03:42 fuzzer started 2023/06/19 11:03:42 dialing manager at localhost:44161 2023/06/19 11:03:42 checking machine... 2023/06/19 11:03:42 checking revisions... [ 34.889034] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:03:42 testing simple program... [ 34.932721] cgroup: Unknown subsys name 'net' [ 34.969541] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:03:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff8613751a RDX=1ffff1100d9c134a RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =ffffffff8613751e R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff88806ce09da0 R15=ffff88806ce09a50 RIP=ffffffff81131271 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 00007f745340f700 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=00007f753a0d9210 CR3=000000000ef76000 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=3a5d3932325b646873732031343a3330 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363834 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=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff888008e57d18 RSI=ffff888008e57cf0 RDI=ffff888008e57988 RBP=ffff888008e57a10 RSP=ffff888008e57968 R8 =0000000000000001 R9 =ffff888008e579b8 R10=0000000000038001 R11=0000000000020dae R12=ffff888008e57a40 R13=0000000000000000 R14=ffff888008e2d1c0 R15=ffff888008e57978 RIP=ffffffff81130937 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 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=00007ffe3e42b000 CR3=000000000fe8c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000