syzkaller login: [ 30.432482] BUG: Bad rss-counter state mm:0000000023ff3ec0 type:MM_FILEPAGES val:33 [ 30.433889] BUG: Bad rss-counter state mm:0000000023ff3ec0 type:MM_ANONPAGES val:22 [ 30.578052] ================================================================== [ 30.578684] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.579551] Read of size 8 at addr ffff88801a1026b0 by task sshd/221 [ 30.580051] [ 30.580194] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.580745] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.581367] Call Trace: [ 30.581574] [ 30.581758] dump_stack_lvl+0x91/0xf0 [ 30.582081] print_report+0xcc/0x620 [ 30.582401] ? __virt_addr_valid+0x102/0x340 [ 30.582759] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.583146] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.583537] kasan_report+0xbe/0xf0 [ 30.587885] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.588308] vma_interval_tree_remove+0xc75/0xec0 [ 30.588734] vma_prepare+0xc54/0x11a0 [ 30.589071] __split_vma+0x5af/0x950 [ 30.589398] ? __pfx___split_vma+0x10/0x10 [ 30.589786] ? find_held_lock+0x2c/0x110 [ 30.590156] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.590524] ? lock_is_held_type+0x9f/0x120 [ 30.590873] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.591255] ? mtree_range_walk+0x632/0x900 [ 30.591613] ? mas_walk+0x5c7/0x7c0 [ 30.591946] do_vmi_munmap+0x1f1/0x2b0 [ 30.592262] mmap_region+0x1f9/0x2660 [ 30.592567] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.592901] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.593352] ? __pfx_lock_acquire+0x10/0x10 [ 30.593694] ? __pfx_mmap_region+0x10/0x10 [ 30.594041] ? security_mmap_addr+0x7d/0xa0 [ 30.594376] ? get_unmapped_area+0x1f5/0x3f0 [ 30.594726] do_mmap+0x854/0xf00 [ 30.595009] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.595334] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.595697] ksys_mmap_pgoff+0x3af/0x500 [ 30.596085] do_syscall_64+0x3f/0x90 [ 30.596401] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.596815] RIP: 0033:0x7fe6020b1d82 [ 30.597107] 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 [ 30.598463] RSP: 002b:00007ffd2ced9648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.599036] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe6020b1d82 [ 30.599564] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe6014eb000 [ 30.600161] RBP: 00007fe6014eb000 R08: 0000000000000009 R09: 0000000000001000 [ 30.600704] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eaf6d2fec0 [ 30.601244] R13: 00007ffd2ced9660 R14: 00007ffd2ced9690 R15: 00007ffd2ced99f0 [ 30.601801] [ 30.601992] [ 30.602132] Allocated by task 214: [ 30.602409] kasan_save_stack+0x22/0x50 [ 30.602731] kasan_set_track+0x25/0x30 [ 30.603056] __kasan_slab_alloc+0x59/0x70 [ 30.603390] kmem_cache_alloc+0x16b/0x370 [ 30.603715] vm_area_dup+0x20/0x160 [ 30.604135] __split_vma+0x170/0x950 [ 30.604475] split_vma+0xc6/0x110 [ 30.604796] mprotect_fixup+0x8d2/0xb30 [ 30.605153] do_mprotect_pkey+0x87e/0xd40 [ 30.605513] __x64_sys_mprotect+0x78/0xc0 [ 30.605872] do_syscall_64+0x3f/0x90 [ 30.606208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.606684] [ 30.606841] Freed by task 214: [ 30.607118] kasan_save_stack+0x22/0x50 [ 30.607465] kasan_set_track+0x25/0x30 [ 30.607801] kasan_save_free_info+0x2b/0x50 [ 30.608163] __kasan_slab_free+0x10a/0x190 [ 30.608535] kmem_cache_free+0x10d/0x4d0 [ 30.608918] rcu_core+0x8c8/0x2860 [ 30.609239] __do_softirq+0x1b7/0x7d4 [ 30.609568] [ 30.609722] Last potentially related work creation: [ 30.610127] kasan_save_stack+0x22/0x50 [ 30.610527] __kasan_record_aux_stack+0x8e/0xa0 [ 30.610920] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.611360] remove_vma+0x139/0x170 [ 30.611678] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.612104] do_vmi_munmap+0x1f1/0x2b0 [ 30.612444] __vm_munmap+0x138/0x3a0 [ 30.612776] __x64_sys_munmap+0x59/0x80 [ 30.613133] do_syscall_64+0x3f/0x90 [ 30.613468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.613916] [ 30.614073] The buggy address belongs to the object at ffff88801a102658 [ 30.614073] which belongs to the cache vm_area_struct of size 168 [ 30.619960] The buggy address is located 88 bytes inside of [ 30.619960] freed 168-byte region [ffff88801a102658, ffff88801a102700) [ 30.620863] [ 30.621008] The buggy address belongs to the physical page: [ 30.621433] page:000000009f1adc5e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a102 [ 30.622133] memcg:ffff88801a100001 [ 30.622407] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.622849] page_type: 0xffffffff() [ 30.623135] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.623766] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a100001 [ 30.624344] page dumped because: kasan: bad access detected [ 30.624776] [ 30.624917] Memory state around the buggy address: [ 30.625289] ffff88801a102580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.625841] ffff88801a102600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.626376] >ffff88801a102680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.626930] ^ [ 30.627313] ffff88801a102700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.627943] ffff88801a102780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.628489] ================================================================== [ 30.629210] Disabling lock debugging due to kernel taint [ 32.490053] BUG: Bad rss-counter state mm:00000000e9b0cd46 type:MM_FILEPAGES val:33 [ 32.490709] BUG: Bad rss-counter state mm:00000000e9b0cd46 type:MM_ANONPAGES val:22 [ 33.328884] BUG: Bad rss-counter state mm:0000000041393dc5 type:MM_FILEPAGES val:33 [ 33.331249] BUG: Bad rss-counter state mm:0000000041393dc5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31850' (ECDSA) to the list of known hosts. 2023/06/21 10:07:48 fuzzer started 2023/06/21 10:07:48 dialing manager at localhost:36067 2023/06/21 10:07:48 checking machine... 2023/06/21 10:07:48 checking revisions... [ 34.243890] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:07:48 testing simple program... [ 34.296289] cgroup: Unknown subsys name 'net' [ 34.333382] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:07:48 Registers: info registers vcpu 0 RAX=0000000000000039 RBX=00000000000003f8 RCX=0000000000000000 RDX=00000000000003f8 RSI=ffffffff825054a5 RDI=ffffffff87f6f0a0 RBP=ffffffff87f6f060 RSP=ffff888019c07018 R8 =0000000000000001 R9 =000000000000000a R10=0000000000000039 R11=000000003a475542 R12=0000000000000039 R13=ffffffff87f6f060 R14=0000000000000010 R15=ffffffff82505490 RIP=ffffffff825054fd RFL=00000002 [-------] 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 00007fbed8e07900 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=00007f0c37899328 CR3=000000000ec1a000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f99bee59fd0 CR3=000000000abe6000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=8fef9e28ba903df60000000000133a50 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=322731ce1cc1108d00000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000