syzkaller login: [ 30.159330] BUG: Bad rss-counter state mm:000000009ec15d5c type:MM_FILEPAGES val:33 [ 30.160563] BUG: Bad rss-counter state mm:000000009ec15d5c type:MM_ANONPAGES val:22 [ 30.318920] ================================================================== [ 30.319899] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.320897] Read of size 8 at addr ffff88800d3443f8 by task sshd/219 [ 30.321790] [ 30.322023] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.322947] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.323985] Call Trace: [ 30.324326] [ 30.324625] dump_stack_lvl+0x91/0xf0 [ 30.325140] print_report+0xcc/0x620 [ 30.325669] ? __virt_addr_valid+0x102/0x340 [ 30.326263] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.326917] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.327572] kasan_report+0xbe/0xf0 [ 30.328090] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.328747] vma_interval_tree_remove+0xc75/0xec0 [ 30.329382] vma_prepare+0xc54/0x11a0 [ 30.329923] __split_vma+0x5af/0x950 [ 30.330424] ? __pfx___split_vma+0x10/0x10 [ 30.330986] ? find_held_lock+0x2c/0x110 [ 30.331541] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.332139] ? lock_is_held_type+0x9f/0x120 [ 30.332716] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.333367] ? mtree_range_walk+0x632/0x900 [ 30.333968] ? mas_walk+0x5c7/0x7c0 [ 30.334473] do_vmi_munmap+0x1f1/0x2b0 [ 30.334999] mmap_region+0x1f9/0x2660 [ 30.335514] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.336057] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.336835] ? __pfx_lock_acquire+0x10/0x10 [ 30.337408] ? __pfx_mmap_region+0x10/0x10 [ 30.337991] ? security_mmap_addr+0x7d/0xa0 [ 30.338562] ? get_unmapped_area+0x1f5/0x3f0 [ 30.339171] do_mmap+0x854/0xf00 [ 30.339651] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.340193] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.340805] ksys_mmap_pgoff+0x3af/0x500 [ 30.341358] do_syscall_64+0x3f/0x90 [ 30.341893] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.342598] RIP: 0033:0x7f376d083d82 [ 30.343093] 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 [ 30.345424] RSP: 002b:00007fffae75b928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.346408] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f376d083d82 [ 30.347269] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f376c4bd000 [ 30.348114] RBP: 00007f376c4bd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.349025] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562787f40ec0 [ 30.349979] R13: 00007fffae75b940 R14: 00007fffae75b970 R15: 00007fffae75bcd0 [ 30.350834] [ 30.351132] [ 30.351346] Allocated by task 212: [ 30.351778] kasan_save_stack+0x22/0x50 [ 30.352282] kasan_set_track+0x25/0x30 [ 30.352769] __kasan_slab_alloc+0x59/0x70 [ 30.353295] kmem_cache_alloc+0x16b/0x370 [ 30.353843] vm_area_dup+0x20/0x160 [ 30.354299] __split_vma+0x170/0x950 [ 30.354764] split_vma+0xc6/0x110 [ 30.355204] mprotect_fixup+0x8d2/0xb30 [ 30.355708] do_mprotect_pkey+0x87e/0xd40 [ 30.356228] __x64_sys_mprotect+0x78/0xc0 [ 30.356746] do_syscall_64+0x3f/0x90 [ 30.357217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.357869] [ 30.358103] Freed by task 212: [ 30.358535] kasan_save_stack+0x22/0x50 [ 30.359032] kasan_set_track+0x25/0x30 [ 30.359523] kasan_save_free_info+0x2b/0x50 [ 30.360051] __kasan_slab_free+0x10a/0x190 [ 30.360585] kmem_cache_free+0x10d/0x4d0 [ 30.361113] rcu_core+0x8c8/0x2860 [ 30.361619] __do_softirq+0x1b7/0x7d4 [ 30.362136] [ 30.362362] Last potentially related work creation: [ 30.362980] kasan_save_stack+0x22/0x50 [ 30.363516] __kasan_record_aux_stack+0x8e/0xa0 [ 30.364134] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.364817] remove_vma+0x139/0x170 [ 30.365295] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.365893] do_vmi_munmap+0x1f1/0x2b0 [ 30.366408] __vm_munmap+0x138/0x3a0 [ 30.366910] __x64_sys_munmap+0x59/0x80 [ 30.367440] do_syscall_64+0x3f/0x90 [ 30.367943] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.368622] [ 30.368849] The buggy address belongs to the object at ffff88800d3443a0 [ 30.368849] which belongs to the cache vm_area_struct of size 168 [ 30.370439] The buggy address is located 88 bytes inside of [ 30.370439] freed 168-byte region [ffff88800d3443a0, ffff88800d344448) [ 30.371940] [ 30.372174] The buggy address belongs to the physical page: [ 30.372875] page:0000000005223975 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd344 [ 30.374042] memcg:ffff88800e4d2a01 [ 30.374493] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.375242] page_type: 0xffffffff() [ 30.375721] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 30.376695] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4d2a01 [ 30.377671] page dumped because: kasan: bad access detected [ 30.378379] [ 30.378611] Memory state around the buggy address: [ 30.379230] ffff88800d344280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.380142] ffff88800d344300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.381062] >ffff88800d344380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.381992] ^ [ 30.382892] ffff88800d344400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.383811] ffff88800d344480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.384709] ================================================================== [ 30.385967] Disabling lock debugging due to kernel taint [ 32.217840] BUG: Bad rss-counter state mm:00000000d9bc5053 type:MM_FILEPAGES val:33 [ 32.218889] BUG: Bad rss-counter state mm:00000000d9bc5053 type:MM_ANONPAGES val:22 [ 32.703987] BUG: Bad rss-counter state mm:00000000e94cc038 type:MM_FILEPAGES val:33 [ 32.705232] BUG: Bad rss-counter state mm:00000000e94cc038 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25302' (ECDSA) to the list of known hosts. 2023/06/19 12:05:52 fuzzer started 2023/06/19 12:05:52 dialing manager at localhost:44161 2023/06/19 12:05:52 checking machine... 2023/06/19 12:05:52 checking revisions... [ 33.494004] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:05:52 testing simple program... [ 33.546353] cgroup: Unknown subsys name 'net' [ 33.591674] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:05:45 Registers: info registers vcpu 0 RAX=ffffffff811fc524 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801684f910 RSI=ffffffff811fc524 RDI=ffff88801684f8c8 RBP=ffff88801684f920 RSP=ffff88801684f858 R8 =0000000000000001 R9 =ffff88801684f908 R10=0000000000038001 R11=0000000000022999 R12=ffff88801684f990 R13=ffff88801684f910 R14=ffff88801677b680 R15=ffff88801684f8c8 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 00007f4587cdc900 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=00007ffc28ef7000 CR3=000000000ec42000 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=563412feff00545000000000000080fe 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 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=dffffc0000000000 RSP=ffff888008e27e60 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff812d130c RFL=00000006 [-----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 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=00007f7b48899e60 CR3=0000000015914000 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=2032353a35303a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a35303a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000