[ 31.168711] BUG: Bad rss-counter state mm:0000000020c1e271 type:MM_FILEPAGES val:33 [ 31.170703] BUG: Bad rss-counter state mm:0000000020c1e271 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.322667] ================================================================== [ 31.323565] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.324525] Read of size 8 at addr ffff88800e7a93f8 by task sshd/218 [ 31.325292] [ 31.325517] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.326607] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.327587] Call Trace: [ 31.327919] [ 31.328215] dump_stack_lvl+0x91/0xf0 [ 31.328860] print_report+0xcc/0x620 [ 31.329445] ? __virt_addr_valid+0x102/0x340 [ 31.330108] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.330846] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.331582] kasan_report+0xbe/0xf0 [ 31.332164] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.332934] vma_interval_tree_remove+0xc75/0xec0 [ 31.333681] vma_prepare+0xc54/0x11a0 [ 31.334282] __split_vma+0x5af/0x950 [ 31.334865] ? __pfx___split_vma+0x10/0x10 [ 31.335509] ? find_held_lock+0x2c/0x110 [ 31.336147] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.336843] ? lock_is_held_type+0x9f/0x120 [ 31.337509] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.338275] ? mtree_range_walk+0x632/0x900 [ 31.338937] ? mas_walk+0x5c7/0x7c0 [ 31.339425] do_vmi_munmap+0x1f1/0x2b0 [ 31.339924] mmap_region+0x1f9/0x2660 [ 31.340407] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.340923] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.341631] ? __pfx_lock_acquire+0x10/0x10 [ 31.342168] ? __pfx_mmap_region+0x10/0x10 [ 31.342699] ? security_mmap_addr+0x7d/0xa0 [ 31.343226] ? get_unmapped_area+0x1f5/0x3f0 [ 31.343772] do_mmap+0x854/0xf00 [ 31.344209] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.344702] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.345257] ksys_mmap_pgoff+0x3af/0x500 [ 31.345768] do_syscall_64+0x3f/0x90 [ 31.346259] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.346901] RIP: 0033:0x7f42c9c2cd82 [ 31.347357] 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 [ 31.349520] RSP: 002b:00007ffd922cb0d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.350441] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f42c9c2cd82 [ 31.351299] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f42c9066000 [ 31.352163] RBP: 00007f42c9066000 R08: 0000000000000009 R09: 0000000000001000 [ 31.353027] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561682783f60 [ 31.353879] R13: 00007ffd922cb0f0 R14: 00007ffd922cb120 R15: 00007ffd922cb480 [ 31.354750] [ 31.355047] [ 31.355268] Allocated by task 211: [ 31.355705] kasan_save_stack+0x22/0x50 [ 31.356222] kasan_set_track+0x25/0x30 [ 31.356729] __kasan_slab_alloc+0x59/0x70 [ 31.357261] kmem_cache_alloc+0x16b/0x370 [ 31.357785] vm_area_dup+0x20/0x160 [ 31.358279] __split_vma+0x170/0x950 [ 31.358785] split_vma+0xc6/0x110 [ 31.359249] mprotect_fixup+0x8d2/0xb30 [ 31.359788] do_mprotect_pkey+0x87e/0xd40 [ 31.360338] __x64_sys_mprotect+0x78/0xc0 [ 31.360896] do_syscall_64+0x3f/0x90 [ 31.361397] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.362098] [ 31.362320] Freed by task 211: [ 31.362734] kasan_save_stack+0x22/0x50 [ 31.363262] kasan_set_track+0x25/0x30 [ 31.363782] kasan_save_free_info+0x2b/0x50 [ 31.364361] __kasan_slab_free+0x10a/0x190 [ 31.364917] kmem_cache_free+0x10d/0x4d0 [ 31.365449] rcu_core+0x8c8/0x2860 [ 31.365919] __do_softirq+0x1b7/0x7d4 [ 31.366436] [ 31.366663] Last potentially related work creation: [ 31.367380] kasan_save_stack+0x22/0x50 [ 31.367915] __kasan_record_aux_stack+0x8e/0xa0 [ 31.368520] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.369205] remove_vma+0x139/0x170 [ 31.369683] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.370286] do_vmi_munmap+0x1f1/0x2b0 [ 31.370801] __vm_munmap+0x138/0x3a0 [ 31.371303] __x64_sys_munmap+0x59/0x80 [ 31.371839] do_syscall_64+0x3f/0x90 [ 31.372334] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.373015] [ 31.373246] Second to last potentially related work creation: [ 31.373970] kasan_save_stack+0x22/0x50 [ 31.374504] __kasan_record_aux_stack+0x8e/0xa0 [ 31.375112] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.375798] remove_vma+0x139/0x170 [ 31.376282] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.376869] do_vmi_munmap+0x1f1/0x2b0 [ 31.377375] mmap_region+0x1f9/0x2660 [ 31.377878] do_mmap+0x854/0xf00 [ 31.378345] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.378872] ksys_mmap_pgoff+0x3af/0x500 [ 31.379407] do_syscall_64+0x3f/0x90 [ 31.379905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.380575] [ 31.380800] The buggy address belongs to the object at ffff88800e7a93a0 [ 31.380800] which belongs to the cache vm_area_struct of size 168 [ 31.382400] The buggy address is located 88 bytes inside of [ 31.382400] freed 168-byte region [ffff88800e7a93a0, ffff88800e7a9448) [ 31.383909] [ 31.384138] The buggy address belongs to the physical page: [ 31.384848] page:00000000c1d0e6ed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7a9 [ 31.385995] memcg:ffff88800e89d401 [ 31.386456] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.387206] page_type: 0xffffffff() [ 31.387691] raw: 0100000000000200 ffff88800879fc80 ffffea0000364080 dead00000000000d [ 31.388666] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e89d401 [ 31.389630] page dumped because: kasan: bad access detected [ 31.390352] [ 31.390576] Memory state around the buggy address: [ 31.391195] ffff88800e7a9280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.392125] ffff88800e7a9300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.393037] >ffff88800e7a9380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.393939] ^ [ 31.394836] ffff88800e7a9400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.395761] ffff88800e7a9480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.396673] ================================================================== [ 31.397730] Disabling lock debugging due to kernel taint [ 33.247536] BUG: Bad rss-counter state mm:00000000d5b1b5e8 type:MM_FILEPAGES val:33 [ 33.248459] BUG: Bad rss-counter state mm:00000000d5b1b5e8 type:MM_ANONPAGES val:22 [ 33.724806] BUG: Bad rss-counter state mm:00000000d666e671 type:MM_FILEPAGES val:33 [ 33.725845] BUG: Bad rss-counter state mm:00000000d666e671 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15543' (ECDSA) to the list of known hosts. 2023/06/20 07:19:36 fuzzer started 2023/06/20 07:19:37 dialing manager at localhost:44161 2023/06/20 07:19:37 checking machine... 2023/06/20 07:19:37 checking revisions... [ 34.413382] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:19:37 testing simple program... [ 34.461920] cgroup: Unknown subsys name 'net' [ 34.502531] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:19:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff86605973 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff81007b50 RDI=ffffffff86605973 RBP=ffffffff86605973 RSP=ffff88806ce09a18 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5420 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff8880158ab540 RIP=ffffffff814c0811 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 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=00007f40274a8940 CR3=000000000d688000 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=2036333a39313a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a39313a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb783e RBX=ffffffff85dbc1f4 RCX=ffffffff813ad6cf RDX=0000000000000000 RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffffffff85dbc1f4 RSP=ffff88800b33f690 R8 =ffffffff860d68c0 R9 =ffff88800b33f788 R10=0000000000038001 R11=0000000000010b7e R12=ffffffff85dbc1f4 R13=ffffffff85dbc1cc R14=ffffffff85dbc1f0 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] 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 00007fb266e49900 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=00007ffddbc8f000 CR3=000000001ca24000 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=6720646572637465733a4d41503d706f 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