syzkaller login: [ 62.961368] BUG: Bad rss-counter state mm:0000000070cdd162 type:MM_FILEPAGES val:33 [ 62.962839] BUG: Bad rss-counter state mm:0000000070cdd162 type:MM_ANONPAGES val:22 [ 63.145716] ================================================================== [ 63.146771] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 63.147653] Read of size 8 at addr ffff888010163c20 by task sshd/219 [ 63.148456] [ 63.148666] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 63.149479] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 63.150417] Call Trace: [ 63.150722] [ 63.150994] dump_stack_lvl+0x91/0xf0 [ 63.151459] print_report+0xcc/0x620 [ 63.151920] ? __virt_addr_valid+0x102/0x340 [ 63.152443] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.153028] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.153616] kasan_report+0xbe/0xf0 [ 63.154065] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.154673] vma_interval_tree_remove+0xc75/0xec0 [ 63.155257] vma_prepare+0xc54/0x11a0 [ 63.155727] __split_vma+0x5af/0x950 [ 63.156191] ? __pfx___split_vma+0x10/0x10 [ 63.156709] ? find_held_lock+0x2c/0x110 [ 63.157220] do_vmi_align_munmap+0x2ba/0x11f0 [ 63.157769] ? lock_is_held_type+0x9f/0x120 [ 63.158294] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 63.158898] ? mtree_range_walk+0x632/0x900 [ 63.159440] ? mas_walk+0x5c7/0x7c0 [ 63.159896] do_vmi_munmap+0x1f1/0x2b0 [ 63.160377] mmap_region+0x1f9/0x2660 [ 63.160853] ? vm_mmap_pgoff+0x15c/0x3a0 [ 63.161366] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 63.162060] ? __pfx_lock_acquire+0x10/0x10 [ 63.162601] ? __pfx_mmap_region+0x10/0x10 [ 63.163113] ? security_mmap_addr+0x7d/0xa0 [ 63.163630] ? get_unmapped_area+0x1f5/0x3f0 [ 63.164165] do_mmap+0x854/0xf00 [ 63.164594] vm_mmap_pgoff+0x1a6/0x3a0 [ 63.165070] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 63.165630] ksys_mmap_pgoff+0x3af/0x500 [ 63.166123] do_syscall_64+0x3f/0x90 [ 63.166611] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.167234] RIP: 0033:0x7fd52a3dcd82 [ 63.167686] 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 [ 63.169746] RSP: 002b:00007ffcc1cb9948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 63.170643] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd52a3dcd82 [ 63.171465] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd529816000 [ 63.172293] RBP: 00007fd529816000 R08: 0000000000000009 R09: 0000000000001000 [ 63.173115] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d8175fd90 [ 63.173934] R13: 00007ffcc1cb9960 R14: 00007ffcc1cb9990 R15: 00007ffcc1cb9cf0 [ 63.174800] [ 63.175091] [ 63.175303] Allocated by task 212: [ 63.175734] kasan_save_stack+0x22/0x50 [ 63.176235] kasan_set_track+0x25/0x30 [ 63.176715] __kasan_slab_alloc+0x59/0x70 [ 63.177238] kmem_cache_alloc+0x16b/0x370 [ 63.177746] vm_area_dup+0x20/0x160 [ 63.178198] __split_vma+0x170/0x950 [ 63.178664] split_vma+0xc6/0x110 [ 63.179091] mprotect_fixup+0x8d2/0xb30 [ 63.179586] do_mprotect_pkey+0x87e/0xd40 [ 63.180100] __x64_sys_mprotect+0x78/0xc0 [ 63.180615] do_syscall_64+0x3f/0x90 [ 63.181080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.181702] [ 63.181913] Freed by task 19: [ 63.182290] kasan_save_stack+0x22/0x50 [ 63.182790] kasan_set_track+0x25/0x30 [ 63.183284] kasan_save_free_info+0x2b/0x50 [ 63.183804] __kasan_slab_free+0x10a/0x190 [ 63.184334] kmem_cache_free+0x10d/0x4d0 [ 63.184833] rcu_core+0x8c8/0x2860 [ 63.185279] __do_softirq+0x1b7/0x7d4 [ 63.185748] [ 63.185966] Last potentially related work creation: [ 63.186551] kasan_save_stack+0x22/0x50 [ 63.187045] __kasan_record_aux_stack+0x8e/0xa0 [ 63.187611] __call_rcu_common.constprop.0+0x6a/0xb90 [ 63.188234] remove_vma+0x139/0x170 [ 63.188683] do_vmi_align_munmap+0xd4a/0x11f0 [ 63.189235] do_vmi_munmap+0x1f1/0x2b0 [ 63.189718] __vm_munmap+0x138/0x3a0 [ 63.190179] __x64_sys_munmap+0x59/0x80 [ 63.190670] do_syscall_64+0x3f/0x90 [ 63.191128] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.191754] [ 63.191968] The buggy address belongs to the object at ffff888010163bc8 [ 63.191968] which belongs to the cache vm_area_struct of size 168 [ 63.193391] The buggy address is located 88 bytes inside of [ 63.193391] freed 168-byte region [ffff888010163bc8, ffff888010163c70) [ 63.194884] [ 63.195107] The buggy address belongs to the physical page: [ 63.195773] page:00000000d9d4cf66 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10163 [ 63.196916] memcg:ffff88800c606801 [ 63.197360] flags: 0x100000000000200(slab|node=0|zone=1) [ 63.198035] page_type: 0xffffffff() [ 63.198515] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 63.199467] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c606801 [ 63.200404] page dumped because: kasan: bad access detected [ 63.201085] [ 63.201305] Memory state around the buggy address: [ 63.201897] ffff888010163b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 63.202790] ffff888010163b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 63.203674] >ffff888010163c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 63.204542] ^ [ 63.205077] ffff888010163c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 63.205939] ffff888010163d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 63.206806] ================================================================== [ 63.207894] Disabling lock debugging due to kernel taint [ 65.277143] BUG: Bad rss-counter state mm:00000000030837c1 type:MM_FILEPAGES val:33 [ 65.278359] BUG: Bad rss-counter state mm:00000000030837c1 type:MM_ANONPAGES val:22 [ 65.817112] BUG: Bad rss-counter state mm:00000000f5f59fce type:MM_FILEPAGES val:33 [ 65.818030] BUG: Bad rss-counter state mm:00000000f5f59fce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46588' (ECDSA) to the list of known hosts. 2023/06/19 17:09:44 fuzzer started 2023/06/19 17:09:45 dialing manager at localhost:44161 2023/06/19 17:09:45 checking machine... 2023/06/19 17:09:45 checking revisions... [ 66.465847] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:09:45 testing simple program... [ 66.523581] cgroup: Unknown subsys name 'net' [ 66.577183] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:09:41 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=00007fca6f63beb0 CR3=000000000fe10000 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=2034343a39303a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a39303a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11001ec3eef RCX=0000000000000000 RDX=ffff888016731b40 RSI=ffffffff83798577 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88800f61f748 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=000016c4000016c4 R12=0000000000000000 R13=0000000000000001 R14=ffff8880194bf000 R15=0000000000000000 RIP=ffffffff812d8600 RFL=00000293 [--S-A-C] 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 00007ff8b5efa900 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=000055887a127954 CR3=000000000e1d0000 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=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