syzkaller login: [ 32.209867] BUG: Bad rss-counter state mm:00000000bc6c12f7 type:MM_FILEPAGES val:33 [ 32.210875] BUG: Bad rss-counter state mm:00000000bc6c12f7 type:MM_ANONPAGES val:22 [ 32.376088] ================================================================== [ 32.377021] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.378079] Read of size 8 at addr ffff8880162343f8 by task sshd/220 [ 32.378873] [ 32.379095] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.379995] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.380982] Call Trace: [ 32.381305] [ 32.381624] dump_stack_lvl+0x91/0xf0 [ 32.382123] print_report+0xcc/0x620 [ 32.382612] ? __virt_addr_valid+0x102/0x340 [ 32.383174] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.383799] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.384419] kasan_report+0xbe/0xf0 [ 32.384903] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.385550] vma_interval_tree_remove+0xc75/0xec0 [ 32.386156] vma_prepare+0xc54/0x11a0 [ 32.386639] __split_vma+0x5af/0x950 [ 32.387112] ? __pfx___split_vma+0x10/0x10 [ 32.387646] ? find_held_lock+0x2c/0x110 [ 32.388184] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.388764] ? lock_is_held_type+0x9f/0x120 [ 32.389318] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.389938] ? mtree_range_walk+0x632/0x900 [ 32.390503] ? mas_walk+0x5c7/0x7c0 [ 32.390993] do_vmi_munmap+0x1f1/0x2b0 [ 32.391493] mmap_region+0x1f9/0x2660 [ 32.391982] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.392500] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.393242] ? __pfx_lock_acquire+0x10/0x10 [ 32.393796] ? __pfx_mmap_region+0x10/0x10 [ 32.394327] ? security_mmap_addr+0x7d/0xa0 [ 32.394859] ? get_unmapped_area+0x1f5/0x3f0 [ 32.395416] do_mmap+0x854/0xf00 [ 32.395863] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.396358] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.396930] ksys_mmap_pgoff+0x3af/0x500 [ 32.397439] do_syscall_64+0x3f/0x90 [ 32.397926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.398581] RIP: 0033:0x7f8ccde9ad82 [ 32.399038] 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 [ 32.401184] RSP: 002b:00007ffe3adf4988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.402124] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8ccde9ad82 [ 32.402983] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8ccd2d4000 [ 32.403845] RBP: 00007f8ccd2d4000 R08: 0000000000000009 R09: 0000000000001000 [ 32.404704] R10: 0000000000000812 R11: 0000000000000206 R12: 000055862ad86ec0 [ 32.405564] R13: 00007ffe3adf49a0 R14: 00007ffe3adf49d0 R15: 00007ffe3adf4d30 [ 32.406431] [ 32.406722] [ 32.406944] Allocated by task 213: [ 32.407376] kasan_save_stack+0x22/0x50 [ 32.407889] kasan_set_track+0x25/0x30 [ 32.408388] __kasan_slab_alloc+0x59/0x70 [ 32.408925] kmem_cache_alloc+0x16b/0x370 [ 32.409447] vm_area_dup+0x20/0x160 [ 32.409913] __split_vma+0x170/0x950 [ 32.410388] split_vma+0xc6/0x110 [ 32.410838] mprotect_fixup+0x8d2/0xb30 [ 32.411350] do_mprotect_pkey+0x87e/0xd40 [ 32.411880] __x64_sys_mprotect+0x78/0xc0 [ 32.412410] do_syscall_64+0x3f/0x90 [ 32.412891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.413568] [ 32.413783] Freed by task 210: [ 32.414182] kasan_save_stack+0x22/0x50 [ 32.414692] kasan_set_track+0x25/0x30 [ 32.415191] kasan_save_free_info+0x2b/0x50 [ 32.415731] __kasan_slab_free+0x10a/0x190 [ 32.416274] kmem_cache_free+0x10d/0x4d0 [ 32.416791] rcu_core+0x8c8/0x2860 [ 32.417235] __do_softirq+0x1b7/0x7d4 [ 32.417732] [ 32.417952] Last potentially related work creation: [ 32.418543] kasan_save_stack+0x22/0x50 [ 32.419058] __kasan_record_aux_stack+0x8e/0xa0 [ 32.419652] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.420307] remove_vma+0x139/0x170 [ 32.420770] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.421330] do_vmi_munmap+0x1f1/0x2b0 [ 32.421822] __vm_munmap+0x138/0x3a0 [ 32.422291] __x64_sys_munmap+0x59/0x80 [ 32.422801] do_syscall_64+0x3f/0x90 [ 32.423274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.423936] [ 32.424149] The buggy address belongs to the object at ffff8880162343a0 [ 32.424149] which belongs to the cache vm_area_struct of size 168 [ 32.425670] The buggy address is located 88 bytes inside of [ 32.425670] freed 168-byte region [ffff8880162343a0, ffff888016234448) [ 32.427080] [ 32.427294] The buggy address belongs to the physical page: [ 32.427955] page:00000000b1e82766 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16234 [ 32.429053] memcg:ffff888016c19c01 [ 32.429481] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.430132] page_type: 0xffffffff() [ 32.430588] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.431509] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016c19c01 [ 32.432415] page dumped because: kasan: bad access detected [ 32.433080] [ 32.433299] Memory state around the buggy address: [ 32.433894] ffff888016234280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.434761] ffff888016234300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.435620] >ffff888016234380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.436481] ^ [ 32.437322] ffff888016234400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.438190] ffff888016234480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.439049] ================================================================== [ 32.440054] Disabling lock debugging due to kernel taint [ 34.276958] BUG: Bad rss-counter state mm:0000000034495a8d type:MM_FILEPAGES val:33 [ 34.278529] BUG: Bad rss-counter state mm:0000000034495a8d type:MM_ANONPAGES val:22 [ 34.775785] BUG: Bad rss-counter state mm:0000000071f8c0d4 type:MM_FILEPAGES val:33 [ 34.776966] BUG: Bad rss-counter state mm:0000000071f8c0d4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18771' (ECDSA) to the list of known hosts. 2023/06/19 19:53:49 fuzzer started 2023/06/19 19:53:49 dialing manager at localhost:44161 2023/06/19 19:53:49 checking machine... 2023/06/19 19:53:49 checking revisions... [ 35.509123] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:53:49 testing simple program... [ 35.556855] cgroup: Unknown subsys name 'net' [ 35.613345] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:53:47 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=00007fd4b13fbeb0 CR3=000000000c794000 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=098db6a6a2840d8bf24776bcfedca059 XMM02=ec2efd57dc4c00df0000000000120418 XMM03=d6e733dd621065fe00000000001204e8 XMM04=35bd55a8cad8be9800000000000ae988 XMM05=32d0791b9f9633d50000000000135588 XMM06=4fda316b135da52b0000000000134628 XMM07=e042d86d42eb936e0000000000124ea8 XMM08=d6e733dd621065fe00000000001204e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180ee7e RBX=0000000000000002 RCX=ffffffff86137501 RDX=ffff88806cf09ab8 RSI=ffffffff8180ee7e RDI=ffff88806cf09a70 RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =ffffffff8613751e R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806cf09b38 R13=ffff88806cf09ab8 R14=ffff888015c351c0 R15=ffff88806cf09a70 RIP=ffffffff81130641 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 00007fe171873900 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=00007ffc8423a000 CR3=000000000fe66000 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=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000