syzkaller login: [ 36.204862] BUG: Bad rss-counter state mm:00000000ab5f888f type:MM_FILEPAGES val:33 [ 36.205601] BUG: Bad rss-counter state mm:00000000ab5f888f type:MM_ANONPAGES val:22 [ 36.238517] ================================================================== [ 36.239243] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.239906] Read of size 8 at addr ffff888019ba23f8 by task sshd/219 [ 36.240493] [ 36.240648] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.241275] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.241962] Call Trace: [ 36.242203] [ 36.242413] dump_stack_lvl+0x91/0xf0 [ 36.242779] print_report+0xcc/0x620 [ 36.243126] ? __virt_addr_valid+0x102/0x340 [ 36.243532] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.243970] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.244412] kasan_report+0xbe/0xf0 [ 36.244857] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.245260] vma_interval_tree_remove+0xc75/0xec0 [ 36.245667] vma_prepare+0xc54/0x11a0 [ 36.246000] __split_vma+0x5af/0x950 [ 36.246326] ? __pfx___split_vma+0x10/0x10 [ 36.246707] ? find_held_lock+0x2c/0x110 [ 36.247077] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.247473] ? lock_is_held_type+0x9f/0x120 [ 36.247847] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.248264] ? mtree_range_walk+0x632/0x900 [ 36.248679] ? mas_walk+0x5c7/0x7c0 [ 36.249043] do_vmi_munmap+0x1f1/0x2b0 [ 36.249405] mmap_region+0x1f9/0x2660 [ 36.249949] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.250314] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.250814] ? __pfx_lock_acquire+0x10/0x10 [ 36.251237] ? __pfx_mmap_region+0x10/0x10 [ 36.251619] ? security_mmap_addr+0x7d/0xa0 [ 36.252040] ? get_unmapped_area+0x1f5/0x3f0 [ 36.252490] do_mmap+0x854/0xf00 [ 36.252828] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.253206] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.253613] ksys_mmap_pgoff+0x3af/0x500 [ 36.253973] do_syscall_64+0x3f/0x90 [ 36.254317] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.254779] RIP: 0033:0x7fcb0d317d82 [ 36.255105] 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 [ 36.256634] RSP: 002b:00007ffd2e5d8a08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.257288] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcb0d317d82 [ 36.257871] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcb0c751000 [ 36.258465] RBP: 00007fcb0c751000 R08: 0000000000000009 R09: 0000000000001000 [ 36.259081] R10: 0000000000000812 R11: 0000000000000206 R12: 00005573a4ef2ec0 [ 36.259698] R13: 00007ffd2e5d8a20 R14: 00007ffd2e5d8a50 R15: 00007ffd2e5d8db0 [ 36.260311] [ 36.260546] [ 36.260700] Allocated by task 212: [ 36.261012] kasan_save_stack+0x22/0x50 [ 36.261382] kasan_set_track+0x25/0x30 [ 36.261706] __kasan_slab_alloc+0x59/0x70 [ 36.262084] kmem_cache_alloc+0x16b/0x370 [ 36.262453] vm_area_dup+0x20/0x160 [ 36.262781] __split_vma+0x170/0x950 [ 36.263117] split_vma+0xc6/0x110 [ 36.263449] mprotect_fixup+0x8d2/0xb30 [ 36.263812] do_mprotect_pkey+0x87e/0xd40 [ 36.264185] __x64_sys_mprotect+0x78/0xc0 [ 36.264595] do_syscall_64+0x3f/0x90 [ 36.264942] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.265402] [ 36.265557] Freed by task 212: [ 36.265841] kasan_save_stack+0x22/0x50 [ 36.266203] kasan_set_track+0x25/0x30 [ 36.266557] kasan_save_free_info+0x2b/0x50 [ 36.266933] __kasan_slab_free+0x10a/0x190 [ 36.267316] kmem_cache_free+0x10d/0x4d0 [ 36.267669] rcu_core+0x8c8/0x2860 [ 36.267973] __do_softirq+0x1b7/0x7d4 [ 36.268311] [ 36.268488] Last potentially related work creation: [ 36.268914] kasan_save_stack+0x22/0x50 [ 36.269274] __kasan_record_aux_stack+0x8e/0xa0 [ 36.269667] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.270110] remove_vma+0x139/0x170 [ 36.270425] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.270817] do_vmi_munmap+0x1f1/0x2b0 [ 36.271164] __vm_munmap+0x138/0x3a0 [ 36.271495] __x64_sys_munmap+0x59/0x80 [ 36.271849] do_syscall_64+0x3f/0x90 [ 36.272190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.272680] [ 36.272828] The buggy address belongs to the object at ffff888019ba23a0 [ 36.272828] which belongs to the cache vm_area_struct of size 168 [ 36.273851] The buggy address is located 88 bytes inside of [ 36.273851] freed 168-byte region [ffff888019ba23a0, ffff888019ba2448) [ 36.274825] [ 36.274982] The buggy address belongs to the physical page: [ 36.275447] page:0000000066cb09ed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ba2 [ 36.276229] memcg:ffff8880140fd001 [ 36.276567] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.277046] page_type: 0xffffffff() [ 36.277376] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.278072] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880140fd001 [ 36.278745] page dumped because: kasan: bad access detected [ 36.279240] [ 36.279398] Memory state around the buggy address: [ 36.279836] ffff888019ba2280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 36.280462] ffff888019ba2300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 36.281040] >ffff888019ba2380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 36.281509] ^ [ 36.281972] ffff888019ba2400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 36.282444] ffff888019ba2480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.282914] ================================================================== [ 36.283627] Disabling lock debugging due to kernel taint [ 38.237201] BUG: Bad rss-counter state mm:00000000170931c2 type:MM_FILEPAGES val:33 [ 38.237931] BUG: Bad rss-counter state mm:00000000170931c2 type:MM_ANONPAGES val:22 [ 38.604065] BUG: Bad rss-counter state mm:00000000f6b7893d type:MM_FILEPAGES val:33 [ 38.604893] BUG: Bad rss-counter state mm:00000000f6b7893d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24104' (ECDSA) to the list of known hosts. 2023/06/20 09:17:20 fuzzer started 2023/06/20 09:17:21 dialing manager at localhost:44161 2023/06/20 09:17:21 checking machine... 2023/06/20 09:17:21 checking revisions... [ 39.192122] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:17:21 testing simple program... [ 39.229562] cgroup: Unknown subsys name 'net' [ 39.266572] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:17:15 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f2098d9bf00 CR3=000000000cd90000 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=6a4f830cd04eb4a07a48e32f35bf8103 XMM02=000000000011dfd0eff9b2d0a8fce9cb XMM03=000000000011e0a02c67c8bc2e329bc3 XMM04=994d42d4e590918d00000000000ae988 XMM05=dfcdbad4f1609c3700000000001348c0 XMM06=a254f4be602449520000000000133728 XMM07=e042d86d42eb936e0000000000124fc8 XMM08=5e64c9c2b375dc6e000000000011e0a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff8153447a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8450bf7c RSP=ffff88800da17f10 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=000000000000002c R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81534482 RFL=00000047 [---Z-PC] 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 00007f3d259c4900 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=00007ffc10b0e000 CR3=000000000d8b8000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000