syzkaller login: [ 31.205783] BUG: Bad rss-counter state mm:000000009402c18c type:MM_FILEPAGES val:33 [ 31.208075] BUG: Bad rss-counter state mm:000000009402c18c type:MM_ANONPAGES val:22 [ 31.382572] ================================================================== [ 31.383486] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.384440] Read of size 8 at addr ffff8880171116b0 by task sshd/220 [ 31.385233] [ 31.385565] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.386468] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.387459] Call Trace: [ 31.387827] [ 31.388115] dump_stack_lvl+0x91/0xf0 [ 31.388626] print_report+0xcc/0x620 [ 31.389128] ? __virt_addr_valid+0x102/0x340 [ 31.389702] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.390325] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.390965] kasan_report+0xbe/0xf0 [ 31.391454] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.392096] vma_interval_tree_remove+0xc75/0xec0 [ 31.392723] vma_prepare+0xc54/0x11a0 [ 31.393204] __split_vma+0x5af/0x950 [ 31.393705] ? __pfx___split_vma+0x10/0x10 [ 31.394235] ? find_held_lock+0x2c/0x110 [ 31.394777] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.395342] ? lock_is_held_type+0x9f/0x120 [ 31.395903] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.396511] ? mtree_range_walk+0x632/0x900 [ 31.397096] ? mas_walk+0x5c7/0x7c0 [ 31.397601] do_vmi_munmap+0x1f1/0x2b0 [ 31.398097] mmap_region+0x1f9/0x2660 [ 31.398597] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.399108] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.399853] ? __pfx_lock_acquire+0x10/0x10 [ 31.400389] ? __pfx_mmap_region+0x10/0x10 [ 31.400956] ? security_mmap_addr+0x7d/0xa0 [ 31.401507] ? get_unmapped_area+0x1f5/0x3f0 [ 31.402076] do_mmap+0x854/0xf00 [ 31.402522] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.403024] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.403610] ksys_mmap_pgoff+0x3af/0x500 [ 31.404139] do_syscall_64+0x3f/0x90 [ 31.404632] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.405310] RIP: 0033:0x7f089fe78d82 [ 31.405798] 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 [ 31.408245] RSP: 002b:00007fff1088a1b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.409176] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f089fe78d82 [ 31.410051] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f089f2b2000 [ 31.410919] RBP: 00007f089f2b2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.411784] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ab46e5dec0 [ 31.412640] R13: 00007fff1088a1d0 R14: 00007fff1088a200 R15: 00007fff1088a560 [ 31.413505] [ 31.413822] [ 31.414041] Allocated by task 213: [ 31.414467] kasan_save_stack+0x22/0x50 [ 31.414983] kasan_set_track+0x25/0x30 [ 31.415480] __kasan_slab_alloc+0x59/0x70 [ 31.416019] kmem_cache_alloc+0x16b/0x370 [ 31.416542] vm_area_dup+0x20/0x160 [ 31.417038] __split_vma+0x170/0x950 [ 31.417506] split_vma+0xc6/0x110 [ 31.417981] mprotect_fixup+0x8d2/0xb30 [ 31.418480] do_mprotect_pkey+0x87e/0xd40 [ 31.419014] __x64_sys_mprotect+0x78/0xc0 [ 31.419550] do_syscall_64+0x3f/0x90 [ 31.420035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.420704] [ 31.420925] Freed by task 213: [ 31.421317] kasan_save_stack+0x22/0x50 [ 31.421851] kasan_set_track+0x25/0x30 [ 31.422346] kasan_save_free_info+0x2b/0x50 [ 31.422890] __kasan_slab_free+0x10a/0x190 [ 31.423421] kmem_cache_free+0x10d/0x4d0 [ 31.423950] rcu_core+0x8c8/0x2860 [ 31.424392] __do_softirq+0x1b7/0x7d4 [ 31.424906] [ 31.425122] Last potentially related work creation: [ 31.425744] kasan_save_stack+0x22/0x50 [ 31.426243] __kasan_record_aux_stack+0x8e/0xa0 [ 31.426832] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.427485] remove_vma+0x139/0x170 [ 31.427980] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.428554] do_vmi_munmap+0x1f1/0x2b0 [ 31.429063] __vm_munmap+0x138/0x3a0 [ 31.429550] __x64_sys_munmap+0x59/0x80 [ 31.430059] do_syscall_64+0x3f/0x90 [ 31.430543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.431189] [ 31.431410] The buggy address belongs to the object at ffff888017111658 [ 31.431410] which belongs to the cache vm_area_struct of size 168 [ 31.432924] The buggy address is located 88 bytes inside of [ 31.432924] freed 168-byte region [ffff888017111658, ffff888017111700) [ 31.434362] [ 31.434598] The buggy address belongs to the physical page: [ 31.435274] page:00000000dc503be9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17111 [ 31.436382] memcg:ffff88800c8fbf01 [ 31.436857] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.437506] page_type: 0xffffffff() [ 31.437988] raw: 0100000000000200 ffff8880087a0c80 ffffea000066cf80 dead000000000006 [ 31.438926] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c8fbf01 [ 31.439854] page dumped because: kasan: bad access detected [ 31.440514] [ 31.440747] Memory state around the buggy address: [ 31.441333] ffff888017111580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.442242] ffff888017111600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.443115] >ffff888017111680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.443992] ^ [ 31.444589] ffff888017111700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.445460] ffff888017111780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.446344] ================================================================== [ 31.447354] Disabling lock debugging due to kernel taint [ 33.329455] BUG: Bad rss-counter state mm:00000000a74c6c37 type:MM_FILEPAGES val:33 [ 33.331092] BUG: Bad rss-counter state mm:00000000a74c6c37 type:MM_ANONPAGES val:22 [ 33.798863] BUG: Bad rss-counter state mm:00000000b42e446e type:MM_FILEPAGES val:33 [ 33.800637] BUG: Bad rss-counter state mm:00000000b42e446e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46445' (ECDSA) to the list of known hosts. 2023/06/20 23:26:37 fuzzer started 2023/06/20 23:26:37 dialing manager at localhost:36067 2023/06/20 23:26:37 checking machine... 2023/06/20 23:26:37 checking revisions... [ 34.518465] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:26:37 testing simple program... [ 34.571857] cgroup: Unknown subsys name 'net' [ 34.609332] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:26:37 Registers: info registers vcpu 0 RAX=00000000ffffffff RBX=dffffc0000000000 RCX=0000000000000002 RDX=1ffffffff0ba7a24 RSI=ffffea0000665f00 RDI=ffffffff85d3d120 RBP=ffffea0000665e00 RSP=ffff88806ce09c40 R8 =0000000000000000 R9 =ffff88807ffdc690 R10=ffffea0000665e30 R11=0000000000019978 R12=0000000000000002 R13=ffffea0000665f00 R14=000000000001997c R15=ffff88807ffdc500 RIP=ffffffff81789744 RFL=00000046 [---Z-P-] 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 00007ffbcf560900 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=00007ffbcfb15650 CR3=000000000e762000 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=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=00007fb442132580 CR3=000000000d722000 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=a0e15598ceba3e89d5423c21afdd3280 XMM02=ec2efd57dc4c00df000000000011a8e8 XMM03=fdb524500327da79000000000011a9b8 XMM04=2e96a44c2fd7a22500000000000ae988 XMM05=19e9129bd510f2350000000000131c98 XMM06=c093ff7930072ba70000000000130b00 XMM07=e042d86d42eb936e0000000000122150 XMM08=fdb524500327da79000000000011a9b8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000