syzkaller login: [ 30.067851] BUG: Bad rss-counter state mm:000000007a4b4e87 type:MM_FILEPAGES val:33 [ 30.069302] BUG: Bad rss-counter state mm:000000007a4b4e87 type:MM_ANONPAGES val:22 [ 30.225482] ================================================================== [ 30.226241] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.226983] Read of size 8 at addr ffff88800dedd140 by task sshd/220 [ 30.227590] [ 30.227759] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.228443] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.229347] Call Trace: [ 30.229603] [ 30.229832] dump_stack_lvl+0x91/0xf0 [ 30.230218] print_report+0xcc/0x620 [ 30.230598] ? __virt_addr_valid+0x102/0x340 [ 30.231035] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.231542] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.232028] kasan_report+0xbe/0xf0 [ 30.232409] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.232895] vma_interval_tree_remove+0xc75/0xec0 [ 30.233374] vma_prepare+0xc54/0x11a0 [ 30.233762] __split_vma+0x5af/0x950 [ 30.234124] ? __pfx___split_vma+0x10/0x10 [ 30.234519] ? find_held_lock+0x2c/0x110 [ 30.234914] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.235335] ? lock_is_held_type+0x9f/0x120 [ 30.235742] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.236199] ? mtree_range_walk+0x632/0x900 [ 30.236611] ? mas_walk+0x5c7/0x7c0 [ 30.236965] do_vmi_munmap+0x1f1/0x2b0 [ 30.237333] mmap_region+0x1f9/0x2660 [ 30.237699] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.238084] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.238616] ? __pfx_lock_acquire+0x10/0x10 [ 30.239011] ? __pfx_mmap_region+0x10/0x10 [ 30.239405] ? security_mmap_addr+0x7d/0xa0 [ 30.239809] ? get_unmapped_area+0x1f5/0x3f0 [ 30.240220] do_mmap+0x854/0xf00 [ 30.240553] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.240928] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.241347] ksys_mmap_pgoff+0x3af/0x500 [ 30.241751] do_syscall_64+0x3f/0x90 [ 30.242115] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.242603] RIP: 0033:0x7f4246c1fd82 [ 30.242956] 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 [ 30.244566] RSP: 002b:00007ffdee408028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.245280] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4246c1fd82 [ 30.245956] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4246059000 [ 30.246620] RBP: 00007f4246059000 R08: 0000000000000009 R09: 0000000000001000 [ 30.247290] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f1bee4dec0 [ 30.247958] R13: 00007ffdee408040 R14: 00007ffdee408070 R15: 00007ffdee4083d0 [ 30.248631] [ 30.248861] [ 30.249029] Allocated by task 213: [ 30.249373] kasan_save_stack+0x22/0x50 [ 30.249769] kasan_set_track+0x25/0x30 [ 30.250156] __kasan_slab_alloc+0x59/0x70 [ 30.250567] kmem_cache_alloc+0x16b/0x370 [ 30.250974] vm_area_dup+0x20/0x160 [ 30.251334] __split_vma+0x170/0x950 [ 30.251702] split_vma+0xc6/0x110 [ 30.252054] mprotect_fixup+0x8d2/0xb30 [ 30.252450] do_mprotect_pkey+0x87e/0xd40 [ 30.252862] __x64_sys_mprotect+0x78/0xc0 [ 30.253278] do_syscall_64+0x3f/0x90 [ 30.253670] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.254187] [ 30.254355] Freed by task 213: [ 30.254669] kasan_save_stack+0x22/0x50 [ 30.255063] kasan_set_track+0x25/0x30 [ 30.255461] kasan_save_free_info+0x2b/0x50 [ 30.255879] __kasan_slab_free+0x10a/0x190 [ 30.256297] kmem_cache_free+0x10d/0x4d0 [ 30.256698] rcu_core+0x8c8/0x2860 [ 30.257052] __do_softirq+0x1b7/0x7d4 [ 30.257426] [ 30.257593] Last potentially related work creation: [ 30.258050] kasan_save_stack+0x22/0x50 [ 30.258447] __kasan_record_aux_stack+0x8e/0xa0 [ 30.258917] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.259423] remove_vma+0x139/0x170 [ 30.259780] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.260220] do_vmi_munmap+0x1f1/0x2b0 [ 30.260601] __vm_munmap+0x138/0x3a0 [ 30.260969] __x64_sys_munmap+0x59/0x80 [ 30.261359] do_syscall_64+0x3f/0x90 [ 30.261739] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.262238] [ 30.262409] Second to last potentially related work creation: [ 30.262942] kasan_save_stack+0x22/0x50 [ 30.263338] __kasan_record_aux_stack+0x8e/0xa0 [ 30.263789] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.264289] remove_vma+0x139/0x170 [ 30.264644] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.265080] do_vmi_munmap+0x1f1/0x2b0 [ 30.265459] __vm_munmap+0x138/0x3a0 [ 30.265831] elf_map+0x26f/0x310 [ 30.266186] load_elf_binary+0x3417/0x5030 [ 30.266603] bprm_execve+0x803/0x1940 [ 30.266974] do_execveat_common+0x734/0x8e0 [ 30.267392] __x64_sys_execve+0x93/0xc0 [ 30.267778] do_syscall_64+0x3f/0x90 [ 30.268143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.268647] [ 30.268812] The buggy address belongs to the object at ffff88800dedd0e8 [ 30.268812] which belongs to the cache vm_area_struct of size 168 [ 30.269977] The buggy address is located 88 bytes inside of [ 30.269977] freed 168-byte region [ffff88800dedd0e8, ffff88800dedd190) [ 30.271152] [ 30.271318] The buggy address belongs to the physical page: [ 30.271829] page:00000000524e200b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdedd [ 30.272678] memcg:ffff88800e27fe01 [ 30.273011] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.273509] page_type: 0xffffffff() [ 30.273868] raw: 0100000000000200 ffff88800879fc80 ffffea0000393940 dead000000000002 [ 30.274577] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e27fe01 [ 30.275286] page dumped because: kasan: bad access detected [ 30.275803] [ 30.275970] Memory state around the buggy address: [ 30.276422] ffff88800dedd000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.277083] ffff88800dedd080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.277759] >ffff88800dedd100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.278427] ^ [ 30.278927] ffff88800dedd180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 30.279595] ffff88800dedd200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.280253] ================================================================== [ 30.280964] Disabling lock debugging due to kernel taint [ 31.683747] BUG: Bad rss-counter state mm:000000004f49d277 type:MM_FILEPAGES val:33 [ 31.684810] BUG: Bad rss-counter state mm:000000004f49d277 type:MM_ANONPAGES val:22 [ 32.230336] BUG: Bad rss-counter state mm:00000000cb34efcf type:MM_FILEPAGES val:33 [ 32.231496] BUG: Bad rss-counter state mm:00000000cb34efcf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31999' (ECDSA) to the list of known hosts. 2023/06/19 11:06:43 fuzzer started 2023/06/19 11:06:43 dialing manager at localhost:44161 2023/06/19 11:06:43 checking machine... 2023/06/19 11:06:43 checking revisions... [ 32.868312] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:06:43 testing simple program... [ 32.921030] cgroup: Unknown subsys name 'net' [ 32.972999] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:06:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000002 RDX=1ffff1100d9c1354 RSI=ffff88806ce09df0 RDI=ffff88806ce09aa0 RBP=ffff88806ce09df0 RSP=ffff88806ce099f0 R8 =ffffffff86137542 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=0000000000000008 R13=ffff88806ce09ae0 R14=ffff88806ce09df8 R15=ffff88806ce09a98 RIP=ffffffff81130445 RFL=00000246 [---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 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=00007ffd4f802338 CR3=000000000f1a8000 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=36303a3131203931206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732032343a3630 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303438 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=dffffc0000000000 RBX=ffffffff8363de43 RCX=0000000000000001 RDX=1ffff1100d9e1355 RSI=ffff88800f1cfef0 RDI=ffffffff8363de43 RBP=ffffffff8363de43 RSP=ffff88806cf09a00 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000008a96b R12=0000000000000001 R13=0000000000000000 R14=ffff888014690000 R15=ffff88800da22680 RIP=ffffffff811fc772 RFL=00000283 [--S---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 00007f281ea3f900 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=00007f281eff70b0 CR3=000000000da60000 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=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