syzkaller login: [ 30.062231] BUG: Bad rss-counter state mm:000000006f9209d8 type:MM_FILEPAGES val:33 [ 30.063572] BUG: Bad rss-counter state mm:000000006f9209d8 type:MM_ANONPAGES val:22 [ 30.228571] ================================================================== [ 30.229661] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.230740] Read of size 8 at addr ffff88800d751df0 by task sshd/220 [ 30.231750] [ 30.231973] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.232855] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.233880] Call Trace: [ 30.234222] <TASK> [ 30.234518] dump_stack_lvl+0x91/0xf0 [ 30.235021] print_report+0xcc/0x620 [ 30.235524] ? __virt_addr_valid+0x102/0x340 [ 30.236091] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.236732] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.237367] kasan_report+0xbe/0xf0 [ 30.237850] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.238504] vma_interval_tree_remove+0xc75/0xec0 [ 30.239119] vma_prepare+0xc54/0x11a0 [ 30.239602] __split_vma+0x5af/0x950 [ 30.240079] ? __pfx___split_vma+0x10/0x10 [ 30.240616] ? find_held_lock+0x2c/0x110 [ 30.241149] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.241732] ? lock_is_held_type+0x9f/0x120 [ 30.242284] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.242903] ? mtree_range_walk+0x632/0x900 [ 30.243459] ? mas_walk+0x5c7/0x7c0 [ 30.243940] do_vmi_munmap+0x1f1/0x2b0 [ 30.244451] mmap_region+0x1f9/0x2660 [ 30.244935] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.245447] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.246199] ? __pfx_lock_acquire+0x10/0x10 [ 30.246733] ? __pfx_mmap_region+0x10/0x10 [ 30.247267] ? security_mmap_addr+0x7d/0xa0 [ 30.247805] ? get_unmapped_area+0x1f5/0x3f0 [ 30.248362] do_mmap+0x854/0xf00 [ 30.248807] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.249303] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.249876] ksys_mmap_pgoff+0x3af/0x500 [ 30.250409] do_syscall_64+0x3f/0x90 [ 30.250892] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.251541] RIP: 0033:0x7fd426da8d82 [ 30.252008] 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 [ 30.254154] RSP: 002b:00007ffe564b4c28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.255071] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd426da8d82 [ 30.255914] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd4261e2000 [ 30.256759] RBP: 00007fd4261e2000 R08: 0000000000000009 R09: 0000000000001000 [ 30.257615] R10: 0000000000000812 R11: 0000000000000206 R12: 000056275e3e1ec0 [ 30.258472] R13: 00007ffe564b4c40 R14: 00007ffe564b4c70 R15: 00007ffe564b4fd0 [ 30.259335] </TASK> [ 30.259631] [ 30.259848] Allocated by task 213: [ 30.260280] kasan_save_stack+0x22/0x50 [ 30.260789] kasan_set_track+0x25/0x30 [ 30.261288] __kasan_slab_alloc+0x59/0x70 [ 30.261824] kmem_cache_alloc+0x16b/0x370 [ 30.262362] vm_area_dup+0x20/0x160 [ 30.262829] __split_vma+0x170/0x950 [ 30.263300] split_vma+0xc6/0x110 [ 30.263746] mprotect_fixup+0x8d2/0xb30 [ 30.264262] do_mprotect_pkey+0x87e/0xd40 [ 30.264794] __x64_sys_mprotect+0x78/0xc0 [ 30.265318] do_syscall_64+0x3f/0x90 [ 30.265803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.266460] [ 30.266686] Freed by task 19: [ 30.267075] kasan_save_stack+0x22/0x50 [ 30.267579] kasan_set_track+0x25/0x30 [ 30.268087] kasan_save_free_info+0x2b/0x50 [ 30.268627] __kasan_slab_free+0x10a/0x190 [ 30.269166] kmem_cache_free+0x10d/0x4d0 [ 30.269677] rcu_core+0x8c8/0x2860 [ 30.270134] __do_softirq+0x1b7/0x7d4 [ 30.270612] [ 30.270830] Last potentially related work creation: [ 30.271422] kasan_save_stack+0x22/0x50 [ 30.271924] __kasan_record_aux_stack+0x8e/0xa0 [ 30.272549] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.273205] remove_vma+0x139/0x170 [ 30.273659] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.274230] do_vmi_munmap+0x1f1/0x2b0 [ 30.274722] __vm_munmap+0x138/0x3a0 [ 30.275194] __x64_sys_munmap+0x59/0x80 [ 30.275691] do_syscall_64+0x3f/0x90 [ 30.276166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.276807] [ 30.277020] Second to last potentially related work creation: [ 30.277706] kasan_save_stack+0x22/0x50 [ 30.278222] __kasan_record_aux_stack+0x8e/0xa0 [ 30.278803] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.279453] remove_vma+0x139/0x170 [ 30.279910] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.280469] do_vmi_munmap+0x1f1/0x2b0 [ 30.280958] __vm_munmap+0x138/0x3a0 [ 30.281425] elf_map+0x26f/0x310 [ 30.281874] load_elf_binary+0xd82/0x5030 [ 30.282419] bprm_execve+0x803/0x1940 [ 30.282901] do_execveat_common+0x734/0x8e0 [ 30.283425] __x64_sys_execve+0x93/0xc0 [ 30.283914] do_syscall_64+0x3f/0x90 [ 30.284390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.285032] [ 30.285246] The buggy address belongs to the object at ffff88800d751d98 [ 30.285246] which belongs to the cache vm_area_struct of size 168 [ 30.286723] The buggy address is located 88 bytes inside of [ 30.286723] freed 168-byte region [ffff88800d751d98, ffff88800d751e40) [ 30.288116] [ 30.288336] The buggy address belongs to the physical page: [ 30.288992] page:00000000c09cf993 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd751 [ 30.290095] memcg:ffff88800e850c01 [ 30.290523] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.291224] page_type: 0xffffffff() [ 30.291683] raw: 0100000000000200 ffff8880087a0c80 ffffea00003854c0 dead000000000007 [ 30.292608] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e850c01 [ 30.293514] page dumped because: kasan: bad access detected [ 30.294194] [ 30.294416] Memory state around the buggy address: [ 30.294999] ffff88800d751c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.295886] ffff88800d751d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.296747] >ffff88800d751d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.297615] ^ [ 30.298450] ffff88800d751e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.299322] ffff88800d751e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.300183] ================================================================== [ 30.301123] Disabling lock debugging due to kernel taint [ 32.847827] BUG: Bad rss-counter state mm:000000003738703f type:MM_FILEPAGES val:33 [ 32.848565] BUG: Bad rss-counter state mm:000000003738703f type:MM_ANONPAGES val:22 [ 33.340552] BUG: Bad rss-counter state mm:000000006a875314 type:MM_FILEPAGES val:33 [ 33.341546] BUG: Bad rss-counter state mm:000000006a875314 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42687' (ECDSA) to the list of known hosts. 2023/06/20 17:02:57 fuzzer started 2023/06/20 17:02:58 dialing manager at localhost:36067 2023/06/20 17:02:58 checking machine... 2023/06/20 17:02:58 checking revisions... [ 34.057627] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:02:58 testing simple program... [ 34.116325] cgroup: Unknown subsys name 'net' [ 34.159020] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:02:57 Registers: info registers vcpu 0 RAX=ffffffff8608a557 RBX=0000000000000001 RCX=ffffffff8608a556 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800fb2f518 RSP=ffff88800fb2f400 R8 =ffffffff8608a55a R9 =ffff88800fb2f500 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800fb2f520 R13=ffff88800fb2f508 R14=ffff88800fb2f558 R15=ffff88800fb2f4c0 RIP=ffffffff81131762 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 00007f52df942700 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=00007f73d62210b0 CR3=000000000d36e000 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=00000000000000000000000000000000 XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732037353a3230 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383635 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=ffffffff8180effe RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff1100d9e1355 RSI=ffffffff8180effe RDI=ffff88806cf09b18 RBP=ffff88806cf09ae8 RSP=ffff88806cf09a48 R8 =ffffffff86138e90 R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806cf09b18 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800d8bd280 RIP=ffffffff813ad474 RFL=00000282 [--S----] 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 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=00007ffba66b5b40 CR3=000000000d7de000 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=b1677a5a070ec99cd94659283be70d6a XMM02=000000000011dc10ec2efd57dc4c00df XMM03=00000000001223b0fb3a66f74a3413ee XMM04=d155a652db44f9b700000000000ae988 XMM05=19e9129bd510f23500000000001338b0 XMM06=24f1a7716f3ab6410000000000132718 XMM07=e042d86d42eb936e0000000000122630 XMM08=fb3a66f74a3413ee000000000011dc70 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000