syzkaller login: [ 35.996459] BUG: Bad rss-counter state mm:0000000088925031 type:MM_FILEPAGES val:33 [ 35.997927] BUG: Bad rss-counter state mm:0000000088925031 type:MM_ANONPAGES val:22 [ 36.170999] ================================================================== [ 36.171992] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.172990] Read of size 8 at addr ffff88800dd5f968 by task sshd/221 [ 36.173821] [ 36.174062] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.175092] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.176132] Call Trace: [ 36.176495] [ 36.176797] dump_stack_lvl+0x91/0xf0 [ 36.177317] print_report+0xcc/0x620 [ 36.177835] ? __virt_addr_valid+0x102/0x340 [ 36.178439] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.179110] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.179779] kasan_report+0xbe/0xf0 [ 36.180299] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.180980] vma_interval_tree_remove+0xc75/0xec0 [ 36.181646] vma_prepare+0xc54/0x11a0 [ 36.182179] __split_vma+0x5af/0x950 [ 36.182699] ? __pfx___split_vma+0x10/0x10 [ 36.183277] ? find_held_lock+0x2c/0x110 [ 36.183858] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.184483] ? lock_is_held_type+0x9f/0x120 [ 36.185077] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.185753] ? mtree_range_walk+0x632/0x900 [ 36.186378] ? mas_walk+0x5c7/0x7c0 [ 36.186923] do_vmi_munmap+0x1f1/0x2b0 [ 36.187486] mmap_region+0x1f9/0x2660 [ 36.188049] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.188640] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.189484] ? __pfx_lock_acquire+0x10/0x10 [ 36.190111] ? __pfx_mmap_region+0x10/0x10 [ 36.190736] ? security_mmap_addr+0x7d/0xa0 [ 36.191348] ? get_unmapped_area+0x1f5/0x3f0 [ 36.191987] do_mmap+0x854/0xf00 [ 36.192495] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.193069] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.193716] ksys_mmap_pgoff+0x3af/0x500 [ 36.194314] do_syscall_64+0x3f/0x90 [ 36.194866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.195585] RIP: 0033:0x7fb438b89d82 [ 36.196059] 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 [ 36.198228] RSP: 002b:00007ffe7dcccdd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.199135] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb438b89d82 [ 36.200017] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb437fc3000 [ 36.200861] RBP: 00007fb437fc3000 R08: 0000000000000009 R09: 0000000000001000 [ 36.201713] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555c28979d90 [ 36.202583] R13: 00007ffe7dcccdf0 R14: 00007ffe7dccce20 R15: 00007ffe7dccd180 [ 36.203448] [ 36.203750] [ 36.203973] Allocated by task 214: [ 36.204424] kasan_save_stack+0x22/0x50 [ 36.204932] kasan_set_track+0x25/0x30 [ 36.205432] __kasan_slab_alloc+0x59/0x70 [ 36.205974] kmem_cache_alloc+0x16b/0x370 [ 36.206494] vm_area_dup+0x20/0x160 [ 36.207006] __split_vma+0x170/0x950 [ 36.207540] split_vma+0xc6/0x110 [ 36.208049] mprotect_fixup+0x8d2/0xb30 [ 36.208629] do_mprotect_pkey+0x87e/0xd40 [ 36.209222] __x64_sys_mprotect+0x78/0xc0 [ 36.209822] do_syscall_64+0x3f/0x90 [ 36.210376] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.211111] [ 36.211359] Freed by task 214: [ 36.211808] kasan_save_stack+0x22/0x50 [ 36.212387] kasan_set_track+0x25/0x30 [ 36.212960] kasan_save_free_info+0x2b/0x50 [ 36.213574] __kasan_slab_free+0x10a/0x190 [ 36.214207] kmem_cache_free+0x10d/0x4d0 [ 36.214788] rcu_core+0x8c8/0x2860 [ 36.215314] __do_softirq+0x1b7/0x7d4 [ 36.215910] [ 36.216160] Last potentially related work creation: [ 36.216828] kasan_save_stack+0x22/0x50 [ 36.217403] __kasan_record_aux_stack+0x8e/0xa0 [ 36.218073] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.218797] remove_vma+0x139/0x170 [ 36.219290] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.219900] do_vmi_munmap+0x1f1/0x2b0 [ 36.220435] __vm_munmap+0x138/0x3a0 [ 36.220944] __x64_sys_munmap+0x59/0x80 [ 36.221492] do_syscall_64+0x3f/0x90 [ 36.222031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.222733] [ 36.222967] The buggy address belongs to the object at ffff88800dd5f910 [ 36.222967] which belongs to the cache vm_area_struct of size 168 [ 36.224564] The buggy address is located 88 bytes inside of [ 36.224564] freed 168-byte region [ffff88800dd5f910, ffff88800dd5f9b8) [ 36.226119] [ 36.226355] The buggy address belongs to the physical page: [ 36.227071] page:00000000c895676c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd5f [ 36.228292] memcg:ffff88801451df01 [ 36.228772] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.229482] page_type: 0xffffffff() [ 36.229985] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.230994] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801451df01 [ 36.231994] page dumped because: kasan: bad access detected [ 36.232727] [ 36.232965] Memory state around the buggy address: [ 36.233612] ffff88800dd5f800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 36.234604] ffff88800dd5f880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 36.235589] >ffff88800dd5f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.236563] ^ [ 36.237464] ffff88800dd5f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 36.238456] ffff88800dd5fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.239436] ================================================================== [ 36.240546] Disabling lock debugging due to kernel taint [ 38.771355] BUG: Bad rss-counter state mm:00000000f3a9533c type:MM_FILEPAGES val:33 [ 38.772518] BUG: Bad rss-counter state mm:00000000f3a9533c type:MM_ANONPAGES val:22 [ 39.242040] BUG: Bad rss-counter state mm:0000000000824fd9 type:MM_FILEPAGES val:33 [ 39.243301] BUG: Bad rss-counter state mm:0000000000824fd9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57451' (ECDSA) to the list of known hosts. 2023/06/19 18:26:57 fuzzer started 2023/06/19 18:26:58 dialing manager at localhost:44161 2023/06/19 18:26:58 checking machine... 2023/06/19 18:26:58 checking revisions... [ 39.870528] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:26:58 testing simple program... [ 39.916112] cgroup: Unknown subsys name 'net' [ 39.973819] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:26:52 Registers: info registers vcpu 0 RAX=ffff8880146e0000 RBX=ffff8880146dfb20 RCX=0000000000000001 RDX=ffff8880146dfb28 RSI=ffff8880146dfaf0 RDI=ffff8880146df420 RBP=ffff8880146d8000 RSP=ffff8880146df3a0 R8 =0000000000000001 R9 =ffff8880146df450 R10=0000000000038001 R11=0000000000091b07 R12=ffff8880146df470 R13=ffff8880146df458 R14=ffff8880146dfaf0 R15=ffff8880146df410 RIP=ffffffff81131296 RFL=00000287 [--S--PC] 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 00007f15ebbbf900 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=00007ffccfd48000 CR3=000000000e87a000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f025ed53c90 CR3=000000000d6c2000 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=2037353a36323a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a36323a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000