syzkaller login: [ 68.317776] BUG: Bad rss-counter state mm:000000002a33e56d type:MM_FILEPAGES val:33 [ 68.319206] BUG: Bad rss-counter state mm:000000002a33e56d type:MM_ANONPAGES val:22 [ 68.470030] ================================================================== [ 68.471170] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.472324] Read of size 8 at addr ffff88801684c140 by task sshd/221 [ 68.473450] [ 68.473695] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 68.474827] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.475901] Call Trace: [ 68.476255] [ 68.476584] dump_stack_lvl+0x91/0xf0 [ 68.477127] print_report+0xcc/0x620 [ 68.477661] ? __virt_addr_valid+0x102/0x340 [ 68.478277] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.478962] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.479649] kasan_report+0xbe/0xf0 [ 68.480178] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.480876] vma_interval_tree_remove+0xc75/0xec0 [ 68.481536] vma_prepare+0xc54/0x11a0 [ 68.482065] __split_vma+0x5af/0x950 [ 68.482588] ? __pfx___split_vma+0x10/0x10 [ 68.483169] ? find_held_lock+0x2c/0x110 [ 68.483749] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.484373] ? lock_is_held_type+0x9f/0x120 [ 68.484980] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.485651] ? mtree_range_walk+0x632/0x900 [ 68.486257] ? mas_walk+0x5c7/0x7c0 [ 68.486781] do_vmi_munmap+0x1f1/0x2b0 [ 68.487324] mmap_region+0x1f9/0x2660 [ 68.487861] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.488434] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.489223] ? __pfx_lock_acquire+0x10/0x10 [ 68.489815] ? __pfx_mmap_region+0x10/0x10 [ 68.490394] ? security_mmap_addr+0x7d/0xa0 [ 68.490982] ? get_unmapped_area+0x1f5/0x3f0 [ 68.491590] do_mmap+0x854/0xf00 [ 68.492078] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.492642] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.493269] ksys_mmap_pgoff+0x3af/0x500 [ 68.493833] do_syscall_64+0x3f/0x90 [ 68.494363] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.495086] RIP: 0033:0x7f0220f0ad82 [ 68.495594] 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 [ 68.497949] RSP: 002b:00007fff5301e758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.498958] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0220f0ad82 [ 68.499893] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0220344000 [ 68.500841] RBP: 00007f0220344000 R08: 0000000000000009 R09: 0000000000001000 [ 68.501784] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f1d56dec0 [ 68.502732] R13: 00007fff5301e770 R14: 00007fff5301e7a0 R15: 00007fff5301eb00 [ 68.503681] [ 68.504004] [ 68.504242] Allocated by task 214: [ 68.504737] kasan_save_stack+0x22/0x50 [ 68.505300] kasan_set_track+0x25/0x30 [ 68.505849] __kasan_slab_alloc+0x59/0x70 [ 68.506429] kmem_cache_alloc+0x16b/0x370 [ 68.506996] vm_area_dup+0x20/0x160 [ 68.507509] __split_vma+0x170/0x950 [ 68.508031] split_vma+0xc6/0x110 [ 68.508526] mprotect_fixup+0x8d2/0xb30 [ 68.509081] do_mprotect_pkey+0x87e/0xd40 [ 68.509663] __x64_sys_mprotect+0x78/0xc0 [ 68.510242] do_syscall_64+0x3f/0x90 [ 68.510771] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.511482] [ 68.511721] Freed by task 214: [ 68.512158] kasan_save_stack+0x22/0x50 [ 68.512743] kasan_set_track+0x25/0x30 [ 68.513289] kasan_save_free_info+0x2b/0x50 [ 68.513883] __kasan_slab_free+0x10a/0x190 [ 68.514533] kmem_cache_free+0x10d/0x4d0 [ 68.515097] rcu_core+0x8c8/0x2860 [ 68.515587] __do_softirq+0x1b7/0x7d4 [ 68.516114] [ 68.516352] Last potentially related work creation: [ 68.517011] kasan_save_stack+0x22/0x50 [ 68.517569] __kasan_record_aux_stack+0x8e/0xa0 [ 68.518203] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.518914] remove_vma+0x139/0x170 [ 68.519416] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.520030] do_vmi_munmap+0x1f1/0x2b0 [ 68.520564] __vm_munmap+0x138/0x3a0 [ 68.521057] __x64_sys_munmap+0x59/0x80 [ 68.521581] do_syscall_64+0x3f/0x90 [ 68.522082] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.522767] [ 68.522998] The buggy address belongs to the object at ffff88801684c0e8 [ 68.522998] which belongs to the cache vm_area_struct of size 168 [ 68.524567] The buggy address is located 88 bytes inside of [ 68.524567] freed 168-byte region [ffff88801684c0e8, ffff88801684c190) [ 68.526065] [ 68.526292] The buggy address belongs to the physical page: [ 68.526990] page:00000000e94c4b84 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1684c [ 68.528136] memcg:ffff888016f0c701 [ 68.528612] flags: 0x100000000000200(slab|node=0|zone=1) [ 68.529299] page_type: 0xffffffff() [ 68.529778] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 68.530764] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016f0c701 [ 68.531734] page dumped because: kasan: bad access detected [ 68.532445] [ 68.532676] Memory state around the buggy address: [ 68.533297] ffff88801684c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.534212] ffff88801684c080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 68.535125] >ffff88801684c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.536032] ^ [ 68.536723] ffff88801684c180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 68.537657] ffff88801684c200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 68.538580] ================================================================== [ 68.539606] Disabling lock debugging due to kernel taint [ 70.735815] BUG: Bad rss-counter state mm:0000000002f77e35 type:MM_FILEPAGES val:33 [ 70.737050] BUG: Bad rss-counter state mm:0000000002f77e35 type:MM_ANONPAGES val:22 [ 71.211664] BUG: Bad rss-counter state mm:0000000070dac05b type:MM_FILEPAGES val:33 [ 71.213085] BUG: Bad rss-counter state mm:0000000070dac05b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27295' (ECDSA) to the list of known hosts. 2023/06/20 05:29:39 fuzzer started 2023/06/20 05:29:40 dialing manager at localhost:44161 2023/06/20 05:29:40 checking machine... 2023/06/20 05:29:40 checking revisions... [ 71.952786] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:29:40 testing simple program... [ 72.001837] cgroup: Unknown subsys name 'net' [ 72.070687] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:29:02 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=000056312b914038 CR3=000000000ee06000 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=2039333a39323a3530203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a39323a3530203032 XMM08=3d656e696c646d632022656369767265 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=ffff888008c58400 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=00007ff22007e000 CR3=000000000c7c2000 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=ef41ac72caeddeb6164d7224d7af6f27 XMM02=0000000000124070ec2efd57dc4c00df XMM03=00000000001288188bd020f176e59f41 XMM04=0755ee8666a6bee300000000000ae988 XMM05=e4cb8bb95a7664b60000000000138a58 XMM06=c291bd5c70af25b900000000001388e0 XMM07=e042d86d42eb936e0000000000128a98 XMM08=8bd020f176e59f4100000000001240d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000