syzkaller login: [ 30.629494] BUG: Bad rss-counter state mm:00000000cdceecb9 type:MM_FILEPAGES val:33 [ 30.631286] BUG: Bad rss-counter state mm:00000000cdceecb9 type:MM_ANONPAGES val:22 [ 30.810981] ================================================================== [ 30.811947] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.812888] Read of size 8 at addr ffff888015ed4140 by task sshd/221 [ 30.813658] [ 30.813875] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.814856] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.815852] Call Trace: [ 30.816169] [ 30.816481] dump_stack_lvl+0x91/0xf0 [ 30.816990] print_report+0xcc/0x620 [ 30.817490] ? __virt_addr_valid+0x102/0x340 [ 30.818063] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.818687] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.819314] kasan_report+0xbe/0xf0 [ 30.819821] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.820447] vma_interval_tree_remove+0xc75/0xec0 [ 30.821052] vma_prepare+0xc54/0x11a0 [ 30.821540] __split_vma+0x5af/0x950 [ 30.822012] ? __pfx___split_vma+0x10/0x10 [ 30.822547] ? find_held_lock+0x2c/0x110 [ 30.823073] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.823661] ? lock_is_held_type+0x9f/0x120 [ 30.824207] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.824817] ? mtree_range_walk+0x632/0x900 [ 30.825376] ? mas_walk+0x5c7/0x7c0 [ 30.825860] do_vmi_munmap+0x1f1/0x2b0 [ 30.826360] mmap_region+0x1f9/0x2660 [ 30.826842] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.827354] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.828083] ? __pfx_lock_acquire+0x10/0x10 [ 30.828623] ? __pfx_mmap_region+0x10/0x10 [ 30.829151] ? security_mmap_addr+0x7d/0xa0 [ 30.829697] ? get_unmapped_area+0x1f5/0x3f0 [ 30.830267] do_mmap+0x854/0xf00 [ 30.830716] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.831215] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.831805] ksys_mmap_pgoff+0x3af/0x500 [ 30.832322] do_syscall_64+0x3f/0x90 [ 30.832825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.833480] RIP: 0033:0x7f09d51aad82 [ 30.833940] 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 [ 30.836161] RSP: 002b:00007ffc45880728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.837072] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f09d51aad82 [ 30.837926] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f09d45e4000 [ 30.838784] RBP: 00007f09d45e4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.839651] R10: 0000000000000812 R11: 0000000000000206 R12: 000055706d980d90 [ 30.840502] R13: 00007ffc45880740 R14: 00007ffc45880770 R15: 00007ffc45880ad0 [ 30.841376] [ 30.841679] [ 30.841893] Allocated by task 214: [ 30.842330] kasan_save_stack+0x22/0x50 [ 30.842844] kasan_set_track+0x25/0x30 [ 30.843334] __kasan_slab_alloc+0x59/0x70 [ 30.843882] kmem_cache_alloc+0x16b/0x370 [ 30.844398] vm_area_dup+0x20/0x160 [ 30.844863] __split_vma+0x170/0x950 [ 30.845339] split_vma+0xc6/0x110 [ 30.845777] mprotect_fixup+0x8d2/0xb30 [ 30.846282] do_mprotect_pkey+0x87e/0xd40 [ 30.846814] __x64_sys_mprotect+0x78/0xc0 [ 30.847333] do_syscall_64+0x3f/0x90 [ 30.847815] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.848463] [ 30.848683] Freed by task 214: [ 30.849077] kasan_save_stack+0x22/0x50 [ 30.849581] kasan_set_track+0x25/0x30 [ 30.850080] kasan_save_free_info+0x2b/0x50 [ 30.850615] __kasan_slab_free+0x10a/0x190 [ 30.851154] kmem_cache_free+0x10d/0x4d0 [ 30.851701] rcu_core+0x8c8/0x2860 [ 30.852153] __do_softirq+0x1b7/0x7d4 [ 30.852635] [ 30.852853] Last potentially related work creation: [ 30.853439] kasan_save_stack+0x22/0x50 [ 30.853943] __kasan_record_aux_stack+0x8e/0xa0 [ 30.854514] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.855158] remove_vma+0x139/0x170 [ 30.855615] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.856176] do_vmi_munmap+0x1f1/0x2b0 [ 30.856673] __vm_munmap+0x138/0x3a0 [ 30.857142] __x64_sys_munmap+0x59/0x80 [ 30.857640] do_syscall_64+0x3f/0x90 [ 30.858117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.858758] [ 30.858976] The buggy address belongs to the object at ffff888015ed40e8 [ 30.858976] which belongs to the cache vm_area_struct of size 168 [ 30.860464] The buggy address is located 88 bytes inside of [ 30.860464] freed 168-byte region [ffff888015ed40e8, ffff888015ed4190) [ 30.861857] [ 30.862075] The buggy address belongs to the physical page: [ 30.862736] page:000000007254168d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15ed4 [ 30.863843] memcg:ffff888015ed5001 [ 30.864268] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.864909] page_type: 0xffffffff() [ 30.865358] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.866267] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015ed5001 [ 30.867183] page dumped because: kasan: bad access detected [ 30.867861] [ 30.868080] Memory state around the buggy address: [ 30.868658] ffff888015ed4000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.869520] ffff888015ed4080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.870381] >ffff888015ed4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.871226] ^ [ 30.871883] ffff888015ed4180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.872767] ffff888015ed4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.873623] ================================================================== [ 30.874997] Disabling lock debugging due to kernel taint [ 32.782446] BUG: Bad rss-counter state mm:0000000050fa5156 type:MM_FILEPAGES val:33 [ 32.783734] BUG: Bad rss-counter state mm:0000000050fa5156 type:MM_ANONPAGES val:22 [ 33.323315] BUG: Bad rss-counter state mm:00000000c412efc8 type:MM_FILEPAGES val:33 [ 33.324518] BUG: Bad rss-counter state mm:00000000c412efc8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29732' (ECDSA) to the list of known hosts. 2023/06/21 04:25:13 fuzzer started 2023/06/21 04:25:13 dialing manager at localhost:36067 2023/06/21 04:25:13 checking machine... 2023/06/21 04:25:13 checking revisions... [ 33.973181] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:25:13 testing simple program... [ 34.023830] cgroup: Unknown subsys name 'net' [ 34.062546] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:25:13 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000002 RCX=ffffffff810bd032 RDX=0000000000000007 RSI=ffffffff8608a556 RDI=ffffffff85d899f8 RBP=ffff88806ce09ac8 RSP=ffff88806ce09978 R8 =ffffffff8608a556 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d89a10 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff8112fc21 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 00007f202057b900 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=00007f2020b330b0 CR3=000000000e6aa000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007ffd59b59478 CR3=000000000dc2c000 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=2032313a35323a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a35323a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000