syzkaller login: [ 36.079784] BUG: Bad rss-counter state mm:00000000418cd296 type:MM_FILEPAGES val:33 [ 36.081463] BUG: Bad rss-counter state mm:00000000418cd296 type:MM_ANONPAGES val:22 [ 36.247816] ================================================================== [ 36.248819] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.249818] Read of size 8 at addr ffff88800f1cf058 by task sshd/220 [ 36.250711] [ 36.250944] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.251875] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.252900] Call Trace: [ 36.253245] [ 36.253552] dump_stack_lvl+0x91/0xf0 [ 36.254079] print_report+0xcc/0x620 [ 36.254591] ? __virt_addr_valid+0x102/0x340 [ 36.255195] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.255844] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.256498] kasan_report+0xbe/0xf0 [ 36.257007] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.257675] vma_interval_tree_remove+0xc75/0xec0 [ 36.258320] vma_prepare+0xc54/0x11a0 [ 36.258829] __split_vma+0x5af/0x950 [ 36.259361] ? __pfx___split_vma+0x10/0x10 [ 36.259934] ? find_held_lock+0x2c/0x110 [ 36.260490] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.261094] ? lock_is_held_type+0x9f/0x120 [ 36.261666] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.262314] ? mtree_range_walk+0x632/0x900 [ 36.262899] ? mas_walk+0x5c7/0x7c0 [ 36.263417] do_vmi_munmap+0x1f1/0x2b0 [ 36.263941] mmap_region+0x1f9/0x2660 [ 36.264453] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.265000] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.265761] ? __pfx_lock_acquire+0x10/0x10 [ 36.266329] ? __pfx_mmap_region+0x10/0x10 [ 36.266892] ? security_mmap_addr+0x7d/0xa0 [ 36.267468] ? get_unmapped_area+0x1f5/0x3f0 [ 36.268060] do_mmap+0x854/0xf00 [ 36.268528] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.269060] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.269661] ksys_mmap_pgoff+0x3af/0x500 [ 36.270203] do_syscall_64+0x3f/0x90 [ 36.270710] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.271525] RIP: 0033:0x7f2d3dfa7d82 [ 36.272104] 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 [ 36.274726] RSP: 002b:00007fffbe57e218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.275898] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2d3dfa7d82 [ 36.276947] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2d3d3e1000 [ 36.277995] RBP: 00007f2d3d3e1000 R08: 0000000000000009 R09: 0000000000001000 [ 36.279050] R10: 0000000000000812 R11: 0000000000000206 R12: 000056197a7c5f70 [ 36.280120] R13: 00007fffbe57e230 R14: 00007fffbe57e260 R15: 00007fffbe57e5c0 [ 36.281046] [ 36.281356] [ 36.281584] Allocated by task 213: [ 36.282040] kasan_save_stack+0x22/0x50 [ 36.282573] kasan_set_track+0x25/0x30 [ 36.283095] __kasan_slab_alloc+0x59/0x70 [ 36.283674] kmem_cache_alloc+0x16b/0x370 [ 36.284225] vm_area_dup+0x20/0x160 [ 36.284708] __split_vma+0x170/0x950 [ 36.285209] split_vma+0xc6/0x110 [ 36.285677] mprotect_fixup+0x8d2/0xb30 [ 36.286213] do_mprotect_pkey+0x87e/0xd40 [ 36.286767] __x64_sys_mprotect+0x78/0xc0 [ 36.287319] do_syscall_64+0x3f/0x90 [ 36.287820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.288504] [ 36.288732] Freed by task 213: [ 36.289150] kasan_save_stack+0x22/0x50 [ 36.289684] kasan_set_track+0x25/0x30 [ 36.290206] kasan_save_free_info+0x2b/0x50 [ 36.290765] __kasan_slab_free+0x10a/0x190 [ 36.291355] kmem_cache_free+0x10d/0x4d0 [ 36.291890] rcu_core+0x8c8/0x2860 [ 36.292366] __do_softirq+0x1b7/0x7d4 [ 36.292872] [ 36.293102] Last potentially related work creation: [ 36.293721] kasan_save_stack+0x22/0x50 [ 36.294249] __kasan_record_aux_stack+0x8e/0xa0 [ 36.294858] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.295548] remove_vma+0x139/0x170 [ 36.296024] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.296620] do_vmi_munmap+0x1f1/0x2b0 [ 36.297135] __vm_munmap+0x138/0x3a0 [ 36.297631] __x64_sys_munmap+0x59/0x80 [ 36.298158] do_syscall_64+0x3f/0x90 [ 36.298657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.299353] [ 36.299580] The buggy address belongs to the object at ffff88800f1cf000 [ 36.299580] which belongs to the cache vm_area_struct of size 168 [ 36.301133] The buggy address is located 88 bytes inside of [ 36.301133] freed 168-byte region [ffff88800f1cf000, ffff88800f1cf0a8) [ 36.302627] [ 36.302857] The buggy address belongs to the physical page: [ 36.303569] page:00000000316fb2f1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1cf [ 36.304728] memcg:ffff88801441ed01 [ 36.305191] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.305885] page_type: 0xffffffff() [ 36.306373] raw: 0100000000000200 ffff88800879fc80 ffffea00003ac9c0 0000000000000006 [ 36.307366] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801441ed01 [ 36.308347] page dumped because: kasan: bad access detected [ 36.309062] [ 36.309295] Memory state around the buggy address: [ 36.309917] ffff88800f1cef00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 36.310814] ffff88800f1cef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.311746] >ffff88800f1cf000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.312649] ^ [ 36.313423] ffff88800f1cf080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 36.314336] ffff88800f1cf100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.315262] ================================================================== [ 36.316293] Disabling lock debugging due to kernel taint [ 38.250005] BUG: Bad rss-counter state mm:00000000e76c2ed7 type:MM_FILEPAGES val:33 [ 38.251218] BUG: Bad rss-counter state mm:00000000e76c2ed7 type:MM_ANONPAGES val:22 [ 38.833696] BUG: Bad rss-counter state mm:00000000b56d6c3b type:MM_FILEPAGES val:33 [ 38.834879] BUG: Bad rss-counter state mm:00000000b56d6c3b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9168' (ECDSA) to the list of known hosts. 2023/06/20 01:57:04 fuzzer started 2023/06/20 01:57:04 dialing manager at localhost:44161 2023/06/20 01:57:04 checking machine... 2023/06/20 01:57:04 checking revisions... [ 39.494743] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:57:04 testing simple program... [ 39.548490] cgroup: Unknown subsys name 'net' [ 39.595881] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:56:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff86605df9 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff813a0ab6 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff88806ce09a28 R8 =0000000000000006 R9 =ffffffff86605df9 R10=ffffffffffffffff R11=00000000000b5420 R12=0000000000000000 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff8880167bc540 RIP=ffffffff813a0abd 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 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=00007fc2eb374940 CR3=0000000019f80000 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=37353a3130203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323530 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=0000000000000000 RBX=000000000000000a RCX=0000000000000000 RDX=0000000000002800 RSI=000000000000000a RDI=ffff888016497e70 RBP=ffff888016497e70 RSP=ffff8880164974a8 R8 =0000000000000007 R9 =0000000000000000 R10=00007f0647933000 R11=0000000000000000 R12=ffff8880164975c8 R13=0000000000002800 R14=ffff888016497ea9 R15=0000000000000002 RIP=ffffffff814c07e4 RFL=00000206 [-----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 00007f0647963900 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=00007f0647942020 CR3=000000000cb9a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000