syzkaller login: [ 30.621478] BUG: Bad rss-counter state mm:0000000075f0bf4b type:MM_FILEPAGES val:33 [ 30.622929] BUG: Bad rss-counter state mm:0000000075f0bf4b type:MM_ANONPAGES val:22 [ 30.789641] ================================================================== [ 30.790570] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.791516] Read of size 8 at addr ffff888019c16310 by task sshd/220 [ 30.792409] [ 30.792628] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.793496] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.794489] Call Trace: [ 30.794808] [ 30.795098] dump_stack_lvl+0x91/0xf0 [ 30.795600] print_report+0xcc/0x620 [ 30.796084] ? __virt_addr_valid+0x102/0x340 [ 30.796635] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.797243] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.797869] kasan_report+0xbe/0xf0 [ 30.798348] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.798973] vma_interval_tree_remove+0xc75/0xec0 [ 30.799593] vma_prepare+0xc54/0x11a0 [ 30.800072] __split_vma+0x5af/0x950 [ 30.800558] ? __pfx___split_vma+0x10/0x10 [ 30.801087] ? lockdep_hardirqs_on_prepare+0x27b/0x3f0 [ 30.801743] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 30.802410] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.802978] ? lock_is_held_type+0x9f/0x120 [ 30.803541] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.804154] ? mtree_range_walk+0x632/0x900 [ 30.804712] ? mas_walk+0x5c7/0x7c0 [ 30.805194] do_vmi_munmap+0x1f1/0x2b0 [ 30.805687] mmap_region+0x1f9/0x2660 [ 30.806165] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.806675] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.807398] ? __pfx_lock_acquire+0x10/0x10 [ 30.807945] ? __pfx_mmap_region+0x10/0x10 [ 30.808478] ? security_mmap_addr+0x7d/0xa0 [ 30.809008] ? get_unmapped_area+0x1f5/0x3f0 [ 30.809564] do_mmap+0x854/0xf00 [ 30.810003] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.810494] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.811054] ksys_mmap_pgoff+0x3af/0x500 [ 30.811575] do_syscall_64+0x3f/0x90 [ 30.812054] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.812701] RIP: 0033:0x7f0d5ea81d82 [ 30.813153] 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 [ 30.815282] RSP: 002b:00007ffd523794c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.816203] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0d5ea81d82 [ 30.817053] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0d5debb000 [ 30.817904] RBP: 00007f0d5debb000 R08: 0000000000000009 R09: 0000000000001000 [ 30.818752] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561c7fe57f70 [ 30.819611] R13: 00007ffd523794e0 R14: 00007ffd52379510 R15: 00007ffd52379870 [ 30.820475] [ 30.820768] [ 30.820982] Allocated by task 213: [ 30.821414] kasan_save_stack+0x22/0x50 [ 30.821924] kasan_set_track+0x25/0x30 [ 30.822422] __kasan_slab_alloc+0x59/0x70 [ 30.822943] kmem_cache_alloc+0x16b/0x370 [ 30.823485] vm_area_dup+0x20/0x160 [ 30.823939] __split_vma+0x170/0x950 [ 30.824410] split_vma+0xc6/0x110 [ 30.824845] mprotect_fixup+0x8d2/0xb30 [ 30.825344] do_mprotect_pkey+0x87e/0xd40 [ 30.825865] __x64_sys_mprotect+0x78/0xc0 [ 30.826389] do_syscall_64+0x3f/0x90 [ 30.826867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.827540] [ 30.827763] Freed by task 19: [ 30.828154] kasan_save_stack+0x22/0x50 [ 30.828667] kasan_set_track+0x25/0x30 [ 30.829163] kasan_save_free_info+0x2b/0x50 [ 30.829706] __kasan_slab_free+0x10a/0x190 [ 30.830237] kmem_cache_free+0x10d/0x4d0 [ 30.830759] rcu_core+0x8c8/0x2860 [ 30.831209] __do_softirq+0x1b7/0x7d4 [ 30.831719] [ 30.831938] Last potentially related work creation: [ 30.832538] kasan_save_stack+0x22/0x50 [ 30.833053] __kasan_record_aux_stack+0x8e/0xa0 [ 30.833638] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.834293] remove_vma+0x139/0x170 [ 30.834759] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.835328] do_vmi_munmap+0x1f1/0x2b0 [ 30.835841] __vm_munmap+0x138/0x3a0 [ 30.836314] __x64_sys_munmap+0x59/0x80 [ 30.836811] do_syscall_64+0x3f/0x90 [ 30.837292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.837941] [ 30.838155] Second to last potentially related work creation: [ 30.838845] kasan_save_stack+0x22/0x50 [ 30.839349] __kasan_record_aux_stack+0x8e/0xa0 [ 30.839931] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.840576] remove_vma+0x139/0x170 [ 30.841031] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.841593] do_vmi_munmap+0x1f1/0x2b0 [ 30.842080] mmap_region+0x1f9/0x2660 [ 30.842559] do_mmap+0x854/0xf00 [ 30.842992] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.843505] ksys_mmap_pgoff+0x3af/0x500 [ 30.844011] do_syscall_64+0x3f/0x90 [ 30.844496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.845150] [ 30.845367] The buggy address belongs to the object at ffff888019c162b8 [ 30.845367] which belongs to the cache vm_area_struct of size 168 [ 30.846848] The buggy address is located 88 bytes inside of [ 30.846848] freed 168-byte region [ffff888019c162b8, ffff888019c16360) [ 30.848285] [ 30.848506] The buggy address belongs to the physical page: [ 30.849168] page:000000000f401607 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c16 [ 30.850260] memcg:ffff88800d496b01 [ 30.850697] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.851397] page_type: 0xffffffff() [ 30.851867] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.852794] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d496b01 [ 30.853704] page dumped because: kasan: bad access detected [ 30.854380] [ 30.854597] Memory state around the buggy address: [ 30.855175] ffff888019c16200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.856036] ffff888019c16280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.856901] >ffff888019c16300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.857758] ^ [ 30.858226] ffff888019c16380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.859084] ffff888019c16400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.859962] ================================================================== [ 30.861022] Disabling lock debugging due to kernel taint [ 32.306375] BUG: Bad rss-counter state mm:000000007cde85ee type:MM_FILEPAGES val:33 [ 32.307115] BUG: Bad rss-counter state mm:000000007cde85ee type:MM_ANONPAGES val:22 [ 32.747691] BUG: Bad rss-counter state mm:00000000968cabd3 type:MM_FILEPAGES val:33 [ 32.748912] BUG: Bad rss-counter state mm:00000000968cabd3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63784' (ECDSA) to the list of known hosts. 2023/06/20 22:16:59 fuzzer started 2023/06/20 22:16:59 dialing manager at localhost:36067 2023/06/20 22:17:00 checking machine... 2023/06/20 22:17:00 checking revisions... [ 33.395557] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:17:00 testing simple program... [ 33.440220] cgroup: Unknown subsys name 'net' [ 33.473541] cgroup: Unknown subsys name 'rlimit' [ 34.530082] BUG: Bad rss-counter state mm:0000000058170795 type:MM_FILEPAGES val:171 [ 34.530936] BUG: Bad rss-counter state mm:0000000058170795 type:MM_ANONPAGES val:50 executing program executing program executing program VM DIAGNOSIS: 22:16:59 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=1ffff1100d9c1383 RSI=ffffffff8460144a RDI=ffff88806ce09b6c RBP=ffff88806ce09c18 RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88801a3b8410 RIP=ffffffff813ad547 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=00007ff58a035d50 CR3=00000000195ec000 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=36313a3232203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383734 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=ffffffff86139749 RBX=0000000000000001 RCX=ffffffff86139744 RDX=0000000000000000 RSI=1ffffffff0c272e9 RDI=ffffffff85dfe5d0 RBP=ffff88800f79f730 RSP=ffff88800f79f668 R8 =ffffffff8613971a R9 =ffff88800f79f718 R10=0000000000038001 R11=0000000000020f03 R12=ffff88800f79f738 R13=ffff88800f79f720 R14=ffff88800f79f719 R15=ffff88800f79f6d8 RIP=ffffffff81130a5b RFL=00000212 [----A--] 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 00007feae0e88900 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=00007feae0e41008 CR3=000000000dbdc000 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