syzkaller login: [ 38.108022] BUG: Bad rss-counter state mm:00000000b330fc9d type:MM_FILEPAGES val:33 [ 38.108742] BUG: Bad rss-counter state mm:00000000b330fc9d type:MM_ANONPAGES val:22 [ 38.282325] ================================================================== [ 38.282934] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.283519] Read of size 8 at addr ffff88801ac32310 by task sshd/225 [ 38.283995] [ 38.284133] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.284671] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.285289] Call Trace: [ 38.285758] [ 38.285939] dump_stack_lvl+0x91/0xf0 [ 38.286335] print_report+0xcc/0x620 [ 38.286658] ? __virt_addr_valid+0x102/0x340 [ 38.287012] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.287473] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.287873] kasan_report+0xbe/0xf0 [ 38.288180] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.288622] vma_interval_tree_remove+0xc75/0xec0 [ 38.289009] vma_prepare+0xc54/0x11a0 [ 38.289465] __split_vma+0x5af/0x950 [ 38.289741] ? __pfx___split_vma+0x10/0x10 [ 38.290046] ? find_held_lock+0x2c/0x110 [ 38.290443] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.290803] ? lock_is_held_type+0x9f/0x120 [ 38.291124] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.291591] ? mtree_range_walk+0x632/0x900 [ 38.291944] ? mas_walk+0x5c7/0x7c0 [ 38.292249] do_vmi_munmap+0x1f1/0x2b0 [ 38.292686] mmap_region+0x1f9/0x2660 [ 38.292998] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.297512] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.297955] ? __pfx_lock_acquire+0x10/0x10 [ 38.298302] ? __pfx_mmap_region+0x10/0x10 [ 38.298638] ? security_mmap_addr+0x7d/0xa0 [ 38.298976] ? get_unmapped_area+0x1f5/0x3f0 [ 38.299323] do_mmap+0x854/0xf00 [ 38.299600] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.299915] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.300268] ksys_mmap_pgoff+0x3af/0x500 [ 38.300588] do_syscall_64+0x3f/0x90 [ 38.300896] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.301316] RIP: 0033:0x7f073b20bd82 [ 38.301774] 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 [ 38.303181] RSP: 002b:00007ffece6644b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.303821] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f073b20bd82 [ 38.304440] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f073a645000 [ 38.304976] RBP: 00007f073a645000 R08: 0000000000000009 R09: 0000000000001000 [ 38.305605] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556c2a1b1ec0 [ 38.306134] R13: 00007ffece6644d0 R14: 00007ffece664500 R15: 00007ffece664860 [ 38.306794] [ 38.306980] [ 38.307119] Allocated by task 216: [ 38.307469] kasan_save_stack+0x22/0x50 [ 38.307794] kasan_set_track+0x25/0x30 [ 38.308107] __kasan_slab_alloc+0x59/0x70 [ 38.308520] kmem_cache_alloc+0x16b/0x370 [ 38.308849] vm_area_dup+0x20/0x160 [ 38.309137] __split_vma+0x170/0x950 [ 38.309565] split_vma+0xc6/0x110 [ 38.309842] mprotect_fixup+0x8d2/0xb30 [ 38.311219] do_mprotect_pkey+0x87e/0xd40 [ 38.311566] __x64_sys_mprotect+0x78/0xc0 [ 38.311900] do_syscall_64+0x3f/0x90 [ 38.312287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.312700] [ 38.312838] Freed by task 19: [ 38.313076] kasan_save_stack+0x22/0x50 [ 38.313529] kasan_set_track+0x25/0x30 [ 38.313843] kasan_save_free_info+0x2b/0x50 [ 38.314312] __kasan_slab_free+0x10a/0x190 [ 38.314655] kmem_cache_free+0x10d/0x4d0 [ 38.314973] rcu_core+0x8c8/0x2860 [ 38.315381] __do_softirq+0x1b7/0x7d4 [ 38.315688] [ 38.315828] Last potentially related work creation: [ 38.316282] kasan_save_stack+0x22/0x50 [ 38.316600] __kasan_record_aux_stack+0x8e/0xa0 [ 38.316958] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.317501] remove_vma+0x139/0x170 [ 38.317776] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.318097] do_vmi_munmap+0x1f1/0x2b0 [ 38.318583] __vm_munmap+0x138/0x3a0 [ 38.318882] __x64_sys_munmap+0x59/0x80 [ 38.319269] do_syscall_64+0x3f/0x90 [ 38.319568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.319962] [ 38.320085] The buggy address belongs to the object at ffff88801ac322b8 [ 38.320085] which belongs to the cache vm_area_struct of size 168 [ 38.321045] The buggy address is located 88 bytes inside of [ 38.321045] freed 168-byte region [ffff88801ac322b8, ffff88801ac32360) [ 38.322068] [ 38.322327] The buggy address belongs to the physical page: [ 38.322733] page:0000000053f40da0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ac32 [ 38.323468] memcg:ffff88800d7bc701 [ 38.323735] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.324130] page_type: 0xffffffff() [ 38.324494] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.325051] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d7bc701 [ 38.325736] page dumped because: kasan: bad access detected [ 38.326135] [ 38.326393] Memory state around the buggy address: [ 38.326742] ffff88801ac32200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.327346] ffff88801ac32280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.327868] >ffff88801ac32300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.328475] ^ [ 38.328750] ffff88801ac32380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.329415] ffff88801ac32400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.329939] ================================================================== [ 38.330729] Disabling lock debugging due to kernel taint [ 40.520034] BUG: Bad rss-counter state mm:000000004e4a9083 type:MM_FILEPAGES val:33 [ 40.520857] BUG: Bad rss-counter state mm:000000004e4a9083 type:MM_ANONPAGES val:22 [ 41.193484] BUG: Bad rss-counter state mm:00000000199d7835 type:MM_FILEPAGES val:33 [ 41.198037] BUG: Bad rss-counter state mm:00000000199d7835 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12229' (ECDSA) to the list of known hosts. 2023/06/21 10:25:19 fuzzer started 2023/06/21 10:25:19 dialing manager at localhost:36067 2023/06/21 10:25:19 checking machine... 2023/06/21 10:25:19 checking revisions... [ 41.912014] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:25:20 testing simple program... [ 41.948971] cgroup: Unknown subsys name 'net' [ 41.990135] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:25:19 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007fe44874d328 CR3=0000000005482000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888015c374e8 RCX=ffffffff86138e01 RDX=1ffff11002b86ea8 RSI=0000000000000000 RDI=ffffffff8180c705 RBP=ffff888015c37540 RSP=ffff888015c374d0 R8 =ffffffff86138e90 R9 =ffff888015c37528 R10=0000000000038001 R11=0000000000020d8f R12=ffff888015c375b0 R13=0000000000000000 R14=ffff888017ee3680 R15=0000000000092cc0 RIP=ffffffff811303b2 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 00007fe0e3b15900 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=00007ffcb951b798 CR3=000000000e84a000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000