syzkaller login: [ 30.766987] BUG: Bad rss-counter state mm:0000000093186f42 type:MM_FILEPAGES val:33 [ 30.768047] BUG: Bad rss-counter state mm:0000000093186f42 type:MM_ANONPAGES val:22 [ 30.817598] ================================================================== [ 30.818746] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.819914] Read of size 8 at addr ffff88801684a798 by task sshd/221 [ 30.820867] [ 30.821140] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.822232] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.823013] Call Trace: [ 30.823270] [ 30.823497] dump_stack_lvl+0x91/0xf0 [ 30.823890] print_report+0xcc/0x620 [ 30.824277] ? __virt_addr_valid+0x102/0x340 [ 30.824716] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.825203] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.825699] kasan_report+0xbe/0xf0 [ 30.826075] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.826573] vma_interval_tree_remove+0xc75/0xec0 [ 30.827054] vma_prepare+0xc54/0x11a0 [ 30.827443] __split_vma+0x5af/0x950 [ 30.827819] ? __pfx___split_vma+0x10/0x10 [ 30.828242] ? find_held_lock+0x2c/0x110 [ 30.828659] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.829115] ? lock_is_held_type+0x9f/0x120 [ 30.829554] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.830042] ? mtree_range_walk+0x632/0x900 [ 30.830484] ? mas_walk+0x5c7/0x7c0 [ 30.830864] do_vmi_munmap+0x1f1/0x2b0 [ 30.831263] mmap_region+0x1f9/0x2660 [ 30.831652] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.832063] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.832632] ? __pfx_lock_acquire+0x10/0x10 [ 30.833059] ? __pfx_mmap_region+0x10/0x10 [ 30.833500] ? security_mmap_addr+0x7d/0xa0 [ 30.833929] ? get_unmapped_area+0x1f5/0x3f0 [ 30.834344] do_mmap+0x854/0xf00 [ 30.834600] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.834900] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.835239] ksys_mmap_pgoff+0x3af/0x500 [ 30.835544] do_syscall_64+0x3f/0x90 [ 30.835827] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.836209] RIP: 0033:0x7fd48b263d82 [ 30.836483] 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 [ 30.837760] RSP: 002b:00007ffcd4d99db8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.838289] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd48b263d82 [ 30.838796] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd48a69d000 [ 30.839299] RBP: 00007fd48a69d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.839804] R10: 0000000000000812 R11: 0000000000000206 R12: 000056311584cf70 [ 30.840307] R13: 00007ffcd4d99dd0 R14: 00007ffcd4d99e00 R15: 00007ffcd4d9a160 [ 30.840811] [ 30.840984] [ 30.841111] Allocated by task 214: [ 30.841368] kasan_save_stack+0x22/0x50 [ 30.841670] kasan_set_track+0x25/0x30 [ 30.841970] __kasan_slab_alloc+0x59/0x70 [ 30.842287] kmem_cache_alloc+0x16b/0x370 [ 30.842596] vm_area_dup+0x20/0x160 [ 30.842875] __split_vma+0x170/0x950 [ 30.843155] split_vma+0xc6/0x110 [ 30.843413] mprotect_fixup+0x8d2/0xb30 [ 30.843708] do_mprotect_pkey+0x87e/0xd40 [ 30.844018] __x64_sys_mprotect+0x78/0xc0 [ 30.844332] do_syscall_64+0x3f/0x90 [ 30.844611] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.844993] [ 30.845121] Freed by task 214: [ 30.845356] kasan_save_stack+0x22/0x50 [ 30.845666] kasan_set_track+0x25/0x30 [ 30.845961] kasan_save_free_info+0x2b/0x50 [ 30.846282] __kasan_slab_free+0x10a/0x190 [ 30.846602] kmem_cache_free+0x10d/0x4d0 [ 30.846907] rcu_core+0x8c8/0x2860 [ 30.847169] __do_softirq+0x1b7/0x7d4 [ 30.847463] [ 30.847585] Last potentially related work creation: [ 30.847931] kasan_save_stack+0x22/0x50 [ 30.848234] __kasan_record_aux_stack+0x8e/0xa0 [ 30.848571] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.848954] remove_vma+0x139/0x170 [ 30.849220] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.849555] do_vmi_munmap+0x1f1/0x2b0 [ 30.849843] __vm_munmap+0x138/0x3a0 [ 30.850120] __x64_sys_munmap+0x59/0x80 [ 30.850411] do_syscall_64+0x3f/0x90 [ 30.850695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.851076] [ 30.851208] The buggy address belongs to the object at ffff88801684a740 [ 30.851208] which belongs to the cache vm_area_struct of size 168 [ 30.852092] The buggy address is located 88 bytes inside of [ 30.852092] freed 168-byte region [ffff88801684a740, ffff88801684a7e8) [ 30.852930] [ 30.853061] The buggy address belongs to the physical page: [ 30.853450] page:00000000df6f6bc4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1684a [ 30.854118] memcg:ffff88800cf1b101 [ 30.854373] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.854748] page_type: 0xffffffff() [ 30.855011] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.855560] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cf1b101 [ 30.856093] page dumped because: kasan: bad access detected [ 30.856485] [ 30.856614] Memory state around the buggy address: [ 30.856957] ffff88801684a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.857460] ffff88801684a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.857983] >ffff88801684a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.858487] ^ [ 30.858785] ffff88801684a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.859298] ffff88801684a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.859808] ================================================================== [ 30.860540] Disabling lock debugging due to kernel taint [ 32.888146] BUG: Bad rss-counter state mm:00000000c7968baf type:MM_FILEPAGES val:33 [ 32.889410] BUG: Bad rss-counter state mm:00000000c7968baf type:MM_ANONPAGES val:22 [ 33.368014] BUG: Bad rss-counter state mm:00000000b1b652cf type:MM_FILEPAGES val:33 [ 33.369166] BUG: Bad rss-counter state mm:00000000b1b652cf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53655' (ECDSA) to the list of known hosts. 2023/06/20 01:20:39 fuzzer started 2023/06/20 01:20:39 dialing manager at localhost:44161 2023/06/20 01:20:39 checking machine... 2023/06/20 01:20:39 checking revisions... [ 34.016958] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:20:39 testing simple program... [ 34.065844] cgroup: Unknown subsys name 'net' [ 34.116801] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:20:39 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=00007fddd2214980 CR3=0000000008da2000 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=f38cbf39f3be34b9d244ba7376468010 XMM02=ec2efd57dc4c00df0000000000120158 XMM03=a4a050c19fe6f3400000000000120228 XMM04=1f04eb69fc5fcc3d00000000000ae988 XMM05=e899221937052f9c00000000001355b8 XMM06=c291bd5c70af25b900000000001343a8 XMM07=fb795ef6d65770560000000000124930 XMM08=2c67c8bc2e329bc300000000001201c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8153447a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8450bf7c RSP=ffff88800e6a7f08 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000007 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8180fd28 RFL=00000056 [---ZAP-] 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 00007fd4be58d700 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=00007f7235f180b0 CR3=0000000016958000 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=30323a3130203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383833 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000