syzkaller login: [ 30.988428] BUG: Bad rss-counter state mm:00000000306dd897 type:MM_FILEPAGES val:33 [ 30.989878] BUG: Bad rss-counter state mm:00000000306dd897 type:MM_ANONPAGES val:22 [ 31.137489] ================================================================== [ 31.138433] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.139376] Read of size 8 at addr ffff88800e0efed8 by task sshd/218 [ 31.140155] [ 31.140478] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.141363] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.142351] Call Trace: [ 31.142697] [ 31.142979] dump_stack_lvl+0x91/0xf0 [ 31.143474] print_report+0xcc/0x620 [ 31.143978] ? __virt_addr_valid+0x102/0x340 [ 31.144537] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.145160] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.145793] kasan_report+0xbe/0xf0 [ 31.146269] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.146881] vma_interval_tree_remove+0xc75/0xec0 [ 31.147486] vma_prepare+0xc54/0x11a0 [ 31.147990] __split_vma+0x5af/0x950 [ 31.148467] ? __pfx___split_vma+0x10/0x10 [ 31.148997] ? find_held_lock+0x2c/0x110 [ 31.149522] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.150080] ? lock_is_held_type+0x9f/0x120 [ 31.150616] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.151219] ? mtree_range_walk+0x632/0x900 [ 31.151778] ? mas_walk+0x5c7/0x7c0 [ 31.152264] do_vmi_munmap+0x1f1/0x2b0 [ 31.152752] mmap_region+0x1f9/0x2660 [ 31.153229] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.153737] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.154460] ? __pfx_lock_acquire+0x10/0x10 [ 31.154987] ? __pfx_mmap_region+0x10/0x10 [ 31.155518] ? security_mmap_addr+0x7d/0xa0 [ 31.156068] ? get_unmapped_area+0x1f5/0x3f0 [ 31.156619] do_mmap+0x854/0xf00 [ 31.157060] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.157589] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.158147] ksys_mmap_pgoff+0x3af/0x500 [ 31.158649] do_syscall_64+0x3f/0x90 [ 31.159124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.159771] RIP: 0033:0x7f815dc02d82 [ 31.160233] 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 [ 31.162361] RSP: 002b:00007ffc6807ebe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.163269] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f815dc02d82 [ 31.164118] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f815d03c000 [ 31.164960] RBP: 00007f815d03c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.165802] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eead24aec0 [ 31.166648] R13: 00007ffc6807ec00 R14: 00007ffc6807ec30 R15: 00007ffc6807ef90 [ 31.167501] [ 31.167805] [ 31.168018] Allocated by task 211: [ 31.168441] kasan_save_stack+0x22/0x50 [ 31.168942] kasan_set_track+0x25/0x30 [ 31.169431] __kasan_slab_alloc+0x59/0x70 [ 31.169950] kmem_cache_alloc+0x16b/0x370 [ 31.170464] vm_area_dup+0x20/0x160 [ 31.170926] __split_vma+0x170/0x950 [ 31.171394] split_vma+0xc6/0x110 [ 31.171836] mprotect_fixup+0x8d2/0xb30 [ 31.172334] do_mprotect_pkey+0x87e/0xd40 [ 31.172852] __x64_sys_mprotect+0x78/0xc0 [ 31.173367] do_syscall_64+0x3f/0x90 [ 31.173835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.174482] [ 31.174696] Freed by task 211: [ 31.175083] kasan_save_stack+0x22/0x50 [ 31.175582] kasan_set_track+0x25/0x30 [ 31.176097] kasan_save_free_info+0x2b/0x50 [ 31.176630] __kasan_slab_free+0x10a/0x190 [ 31.177160] kmem_cache_free+0x10d/0x4d0 [ 31.177668] rcu_core+0x8c8/0x2860 [ 31.178109] __do_softirq+0x1b7/0x7d4 [ 31.178586] [ 31.178799] Last potentially related work creation: [ 31.179383] kasan_save_stack+0x22/0x50 [ 31.179898] __kasan_record_aux_stack+0x8e/0xa0 [ 31.180469] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.181112] remove_vma+0x139/0x170 [ 31.181560] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.182120] do_vmi_munmap+0x1f1/0x2b0 [ 31.182601] __vm_munmap+0x138/0x3a0 [ 31.183068] __x64_sys_munmap+0x59/0x80 [ 31.183563] do_syscall_64+0x3f/0x90 [ 31.184041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.184682] [ 31.184895] Second to last potentially related work creation: [ 31.185575] kasan_save_stack+0x22/0x50 [ 31.186074] __kasan_record_aux_stack+0x8e/0xa0 [ 31.186647] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.187288] remove_vma+0x139/0x170 [ 31.187757] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.188314] do_vmi_munmap+0x1f1/0x2b0 [ 31.188803] mmap_region+0x1f9/0x2660 [ 31.189273] do_mmap+0x854/0xf00 [ 31.189698] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.190190] ksys_mmap_pgoff+0x7d/0x500 [ 31.190688] do_syscall_64+0x3f/0x90 [ 31.191162] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.191816] [ 31.192034] The buggy address belongs to the object at ffff88800e0efe80 [ 31.192034] which belongs to the cache vm_area_struct of size 168 [ 31.193500] The buggy address is located 88 bytes inside of [ 31.193500] freed 168-byte region [ffff88800e0efe80, ffff88800e0eff28) [ 31.194894] [ 31.195109] The buggy address belongs to the physical page: [ 31.195779] page:00000000a95dc488 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0ef [ 31.196861] memcg:ffff88800e0d9301 [ 31.197288] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.197992] page_type: 0xffffffff() [ 31.198451] raw: 0100000000000200 ffff88800879fc80 ffffea0000392c80 dead000000000003 [ 31.199379] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0d9301 [ 31.200298] page dumped because: kasan: bad access detected [ 31.200962] [ 31.201177] Memory state around the buggy address: [ 31.201762] ffff88800e0efd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.202621] ffff88800e0efe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.203475] >ffff88800e0efe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.204346] ^ [ 31.205064] ffff88800e0eff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.205918] ffff88800e0eff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.206771] ================================================================== [ 31.207935] Disabling lock debugging due to kernel taint [ 33.202727] BUG: Bad rss-counter state mm:000000003a230d1d type:MM_FILEPAGES val:33 [ 33.203656] BUG: Bad rss-counter state mm:000000003a230d1d type:MM_ANONPAGES val:22 [ 33.770668] BUG: Bad rss-counter state mm:00000000ab18ccac type:MM_FILEPAGES val:33 [ 33.771655] BUG: Bad rss-counter state mm:00000000ab18ccac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52242' (ECDSA) to the list of known hosts. 2023/06/20 10:13:05 fuzzer started 2023/06/20 10:13:06 dialing manager at localhost:44161 2023/06/20 10:13:06 checking machine... 2023/06/20 10:13:06 checking revisions... [ 34.410750] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:13:06 testing simple program... [ 34.460507] cgroup: Unknown subsys name 'net' [ 34.510639] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:13:05 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800f94d1c0 RCX=ffffffff812d869a RDX=0000000000000000 RSI=ffffffff81821d19 RDI=ffffffff8560b640 RBP=ffff88801018fad0 RSP=ffff88801018f9a0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffffffff8560b640 R13=ffffffff81821d19 R14=0000000000000000 R15=ffffffff8186cb26 RIP=ffffffff812d862e RFL=00000286 [--S--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 00007f9c0cff9900 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=00007f9c0c51a000 CR3=000000000eef8000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=cf8f4c0b4199110c00000000000ae988 XMM05=ab8a0ec5bac854320000000000135d08 XMM06=9ab0ed3de2f413b80000000000134738 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff856529e0 RCX=0000000000000000 RDX=ffff888016b43680 RSI=ffffffff814c842f RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800d9f79c0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f56af6a2477 R13=0000000000000000 R14=ffff888016b43680 R15=ffff888016800980 RIP=ffffffff814c842f 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 00007f56af1af900 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=00007fff51171000 CR3=0000000016896000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000