syzkaller login: [ 42.394750] BUG: Bad rss-counter state mm:000000006c5cf994 type:MM_FILEPAGES val:33 [ 42.396508] BUG: Bad rss-counter state mm:000000006c5cf994 type:MM_ANONPAGES val:22 [ 42.582495] ================================================================== [ 42.583456] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.584561] Read of size 8 at addr ffff88801650d5c8 by task sshd/219 [ 42.585370] [ 42.585600] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.586537] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.587569] Call Trace: [ 42.587909] <TASK> [ 42.588214] dump_stack_lvl+0x91/0xf0 [ 42.588733] print_report+0xcc/0x620 [ 42.589247] ? __virt_addr_valid+0x102/0x340 [ 42.589836] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.590520] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.591175] kasan_report+0xbe/0xf0 [ 42.591681] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.592342] vma_interval_tree_remove+0xc75/0xec0 [ 42.592986] vma_prepare+0xc54/0x11a0 [ 42.593503] __split_vma+0x5af/0x950 [ 42.594012] ? __pfx___split_vma+0x10/0x10 [ 42.594585] ? find_held_lock+0x2c/0x110 [ 42.595139] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.595745] ? lock_is_held_type+0x9f/0x120 [ 42.596320] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.596973] ? mtree_range_walk+0x632/0x900 [ 42.597569] ? mas_walk+0x5c7/0x7c0 [ 42.598083] do_vmi_munmap+0x1f1/0x2b0 [ 42.598631] mmap_region+0x1f9/0x2660 [ 42.599150] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.599715] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.600467] ? __pfx_lock_acquire+0x10/0x10 [ 42.601036] ? __pfx_mmap_region+0x10/0x10 [ 42.601592] ? security_mmap_addr+0x7d/0xa0 [ 42.602152] ? get_unmapped_area+0x1f5/0x3f0 [ 42.602743] do_mmap+0x854/0xf00 [ 42.603217] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.603752] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.604350] ksys_mmap_pgoff+0x3af/0x500 [ 42.604894] do_syscall_64+0x3f/0x90 [ 42.605396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.606080] RIP: 0033:0x7f19eaaced82 [ 42.606575] 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 [ 42.608843] RSP: 002b:00007ffdda0a19b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.609806] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f19eaaced82 [ 42.610730] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f19e9f08000 [ 42.611635] RBP: 00007f19e9f08000 R08: 0000000000000009 R09: 0000000000001000 [ 42.612539] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561e56dcdf70 [ 42.613437] R13: 00007ffdda0a19d0 R14: 00007ffdda0a1a00 R15: 00007ffdda0a1d60 [ 42.614345] </TASK> [ 42.614664] [ 42.614888] Allocated by task 212: [ 42.615346] kasan_save_stack+0x22/0x50 [ 42.615888] kasan_set_track+0x25/0x30 [ 42.616416] __kasan_slab_alloc+0x59/0x70 [ 42.616969] kmem_cache_alloc+0x16b/0x370 [ 42.617513] vm_area_dup+0x20/0x160 [ 42.618002] __split_vma+0x170/0x950 [ 42.618516] split_vma+0xc6/0x110 [ 42.618985] mprotect_fixup+0x8d2/0xb30 [ 42.619519] do_mprotect_pkey+0x87e/0xd40 [ 42.620070] __x64_sys_mprotect+0x78/0xc0 [ 42.620617] do_syscall_64+0x3f/0x90 [ 42.621125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.621801] [ 42.622029] Freed by task 212: [ 42.622447] kasan_save_stack+0x22/0x50 [ 42.622981] kasan_set_track+0x25/0x30 [ 42.623503] kasan_save_free_info+0x2b/0x50 [ 42.624064] __kasan_slab_free+0x10a/0x190 [ 42.624630] kmem_cache_free+0x10d/0x4d0 [ 42.625173] rcu_core+0x8c8/0x2860 [ 42.625639] __do_softirq+0x1b7/0x7d4 [ 42.626139] [ 42.626386] Last potentially related work creation: [ 42.627019] kasan_save_stack+0x22/0x50 [ 42.627556] __kasan_record_aux_stack+0x8e/0xa0 [ 42.628157] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.628828] remove_vma+0x139/0x170 [ 42.629309] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.629905] do_vmi_munmap+0x1f1/0x2b0 [ 42.630426] __vm_munmap+0x138/0x3a0 [ 42.630927] __x64_sys_munmap+0x59/0x80 [ 42.631457] do_syscall_64+0x3f/0x90 [ 42.631962] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.632636] [ 42.632868] The buggy address belongs to the object at ffff88801650d570 [ 42.632868] which belongs to the cache vm_area_struct of size 168 [ 42.634444] The buggy address is located 88 bytes inside of [ 42.634444] freed 168-byte region [ffff88801650d570, ffff88801650d618) [ 42.635949] [ 42.636178] The buggy address belongs to the physical page: [ 42.636888] page:00000000e0e39ba0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1650d [ 42.638053] memcg:ffff8880166a4501 [ 42.638533] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.639223] page_type: 0xffffffff() [ 42.639707] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.640692] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880166a4501 [ 42.641635] page dumped because: kasan: bad access detected [ 42.642336] [ 42.642572] Memory state around the buggy address: [ 42.643185] ffff88801650d480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.644094] ffff88801650d500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 42.645004] >ffff88801650d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.645909] ^ [ 42.646645] ffff88801650d600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 42.647558] ffff88801650d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.648457] ================================================================== [ 42.649988] Disabling lock debugging due to kernel taint [ 44.532424] BUG: Bad rss-counter state mm:00000000fca0da84 type:MM_FILEPAGES val:33 [ 44.533377] BUG: Bad rss-counter state mm:00000000fca0da84 type:MM_ANONPAGES val:22 [ 45.063083] BUG: Bad rss-counter state mm:00000000b0ad9eee type:MM_FILEPAGES val:33 [ 45.064378] BUG: Bad rss-counter state mm:00000000b0ad9eee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47338' (ECDSA) to the list of known hosts. 2023/06/20 07:27:31 fuzzer started 2023/06/20 07:27:31 dialing manager at localhost:44161 2023/06/20 07:27:31 checking machine... 2023/06/20 07:27:31 checking revisions... [ 45.703701] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:27:31 testing simple program... [ 45.743299] cgroup: Unknown subsys name 'net' [ 45.793271] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:27:19 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007fe87316801c CR3=0000000019ffc000 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=37323a3730203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732031333a3732 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303138 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=1ffff11001c24569 RBX=ffff88800e122b18 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e122b48 RBP=ffff888019b9a000 RSP=ffff888008e57c98 R8 =0000000000000001 R9 =ffffed10011caf87 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888019bbe080 R14=ffffffff818c7463 R15=ffff88800dae5c80 RIP=ffffffff81846362 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 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=00007fe873769650 CR3=000000000e9da000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000