[ 32.324210] BUG: Bad rss-counter state mm:00000000d010a933 type:MM_FILEPAGES val:33 [ 32.325908] BUG: Bad rss-counter state mm:00000000d010a933 type:MM_ANONPAGES val:22 [ 32.496266] ================================================================== [ 32.497173] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.498109] Read of size 8 at addr ffff88800d9476b0 by task sshd/218 [ 32.498862] [ 32.499079] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.500045] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.501030] Call Trace: [ 32.501349] [ 32.501648] dump_stack_lvl+0x91/0xf0 [ 32.502134] print_report+0xcc/0x620 [ 32.502612] ? __virt_addr_valid+0x102/0x340 [ 32.503153] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.503768] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.504398] kasan_report+0xbe/0xf0 [ 32.504870] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.505492] vma_interval_tree_remove+0xc75/0xec0 [ 32.506092] vma_prepare+0xc54/0x11a0 [ 32.506573] __split_vma+0x5af/0x950 [ 32.507046] ? __pfx___split_vma+0x10/0x10 [ 32.507577] ? find_held_lock+0x2c/0x110 [ 32.508092] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.508673] ? lock_is_held_type+0x9f/0x120 [ 32.509213] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.509810] ? mtree_range_walk+0x632/0x900 [ 32.510358] ? mas_walk+0x5c7/0x7c0 [ 32.510829] do_vmi_munmap+0x1f1/0x2b0 [ 32.511326] mmap_region+0x1f9/0x2660 [ 32.511803] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.512340] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.513047] ? __pfx_lock_acquire+0x10/0x10 [ 32.513579] ? __pfx_mmap_region+0x10/0x10 [ 32.514108] ? security_mmap_addr+0x7d/0xa0 [ 32.514644] ? get_unmapped_area+0x1f5/0x3f0 [ 32.515193] do_mmap+0x854/0xf00 [ 32.515639] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.516132] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.516710] ksys_mmap_pgoff+0x3af/0x500 [ 32.517230] do_syscall_64+0x3f/0x90 [ 32.517720] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.518363] RIP: 0033:0x7f107d538d82 [ 32.518824] 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 [ 32.520955] RSP: 002b:00007fffb8413798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.521869] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f107d538d82 [ 32.522733] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f107c972000 [ 32.523575] RBP: 00007f107c972000 R08: 0000000000000009 R09: 0000000000001000 [ 32.524425] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560ba5001ec0 [ 32.525262] R13: 00007fffb84137b0 R14: 00007fffb84137e0 R15: 00007fffb8413b40 [ 32.526111] [ 32.526401] [ 32.526614] Allocated by task 211: [ 32.527038] kasan_save_stack+0x22/0x50 [ 32.527542] kasan_set_track+0x25/0x30 [ 32.528030] __kasan_slab_alloc+0x59/0x70 [ 32.528557] kmem_cache_alloc+0x16b/0x370 [ 32.529073] vm_area_dup+0x20/0x160 [ 32.529525] __split_vma+0x170/0x950 [ 32.529986] split_vma+0xc6/0x110 [ 32.530422] mprotect_fixup+0x8d2/0xb30 [ 32.530925] do_mprotect_pkey+0x87e/0xd40 [ 32.531440] __x64_sys_mprotect+0x78/0xc0 [ 32.531976] do_syscall_64+0x3f/0x90 [ 32.532468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.533112] [ 32.533334] Freed by task 211: [ 32.533726] kasan_save_stack+0x22/0x50 [ 32.534234] kasan_set_track+0x25/0x30 [ 32.534733] kasan_save_free_info+0x2b/0x50 [ 32.535266] __kasan_slab_free+0x10a/0x190 [ 32.535811] kmem_cache_free+0x10d/0x4d0 [ 32.536326] rcu_core+0x8c8/0x2860 [ 32.536765] __do_softirq+0x1b7/0x7d4 [ 32.537238] [ 32.537466] Last potentially related work creation: [ 32.538067] kasan_save_stack+0x22/0x50 [ 32.538575] __kasan_record_aux_stack+0x8e/0xa0 [ 32.539162] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.539817] remove_vma+0x139/0x170 [ 32.540276] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.540862] do_vmi_munmap+0x1f1/0x2b0 [ 32.541357] __vm_munmap+0x138/0x3a0 [ 32.541832] __x64_sys_munmap+0x59/0x80 [ 32.542345] do_syscall_64+0x3f/0x90 [ 32.542842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.543498] [ 32.543712] Second to last potentially related work creation: [ 32.544417] kasan_save_stack+0x22/0x50 [ 32.544930] __kasan_record_aux_stack+0x8e/0xa0 [ 32.545520] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.546179] remove_vma+0x139/0x170 [ 32.546635] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.547201] do_vmi_munmap+0x1f1/0x2b0 [ 32.547706] mmap_region+0x1f9/0x2660 [ 32.548189] do_mmap+0x854/0xf00 [ 32.548637] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.549129] ksys_mmap_pgoff+0x3af/0x500 [ 32.549641] do_syscall_64+0x3f/0x90 [ 32.550121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.550781] [ 32.550999] The buggy address belongs to the object at ffff88800d947658 [ 32.550999] which belongs to the cache vm_area_struct of size 168 [ 32.552521] The buggy address is located 88 bytes inside of [ 32.552521] freed 168-byte region [ffff88800d947658, ffff88800d947700) [ 32.553947] [ 32.554165] The buggy address belongs to the physical page: [ 32.554848] page:00000000d7c23ae1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd947 [ 32.555955] memcg:ffff888009827901 [ 32.556396] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.557059] page_type: 0xffffffff() [ 32.557514] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 32.558456] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009827901 [ 32.559386] page dumped because: kasan: bad access detected [ 32.560068] [ 32.560295] Memory state around the buggy address: [ 32.560888] ffff88800d947580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.561770] ffff88800d947600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.562632] >ffff88800d947680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.563478] ^ [ 32.564058] ffff88800d947700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 32.564929] ffff88800d947780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.565772] ================================================================== [ 32.566732] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.483521] BUG: Bad rss-counter state mm:000000005c4dc5f3 type:MM_FILEPAGES val:33 [ 34.484662] BUG: Bad rss-counter state mm:000000005c4dc5f3 type:MM_ANONPAGES val:22 [ 34.970281] BUG: Bad rss-counter state mm:00000000c0517552 type:MM_FILEPAGES val:33 [ 34.971523] BUG: Bad rss-counter state mm:00000000c0517552 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25463' (ECDSA) to the list of known hosts. 2023/06/19 20:40:27 fuzzer started 2023/06/19 20:40:27 dialing manager at localhost:44161 2023/06/19 20:40:27 checking machine... 2023/06/19 20:40:27 checking revisions... [ 35.701166] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:40:28 testing simple program... [ 35.760676] cgroup: Unknown subsys name 'net' [ 35.806926] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:40:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016209680 RCX=0000000000000000 RDX=ffff8880147a8000 RSI=ffffffff81b2a459 RDI=0000000000000005 RBP=0000000000000400 RSP=ffff8880147a76e8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000400 R11=00000000000b6c88 R12=ffff88800e3d5700 R13=ffff88800ce5a000 R14=0000000000000000 R15=ffff8880162096a8 RIP=ffffffff814c081b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fbfb4954900 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=00007fbfb3d6f1c0 CR3=000000000cdb2000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d15bbd05f006d4f200000000000ae988 XMM05=9fd69d563e10782c0000000000136530 XMM06=b8a3bcfccefabd3c0000000000134f60 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff844c0ce9 RDX=0000000000000001 RSI=ffffffff864a9bc2 RDI=ffffffff86048e78 RBP=ffffffff86048e78 RSP=ffff888016e7eca0 R8 =ffffffff864a9bc2 R9 =ffff888016e7ed98 R10=0000000000038001 R11=00000000000b3ea9 R12=ffffffff86048e78 R13=ffffffff86048e78 R14=ffffffff86048e78 R15=dffffc0000000000 RIP=ffffffff8112fc49 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 00007fc8019db900 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=00007fc8019a0008 CR3=000000000a3fc000 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