syzkaller login: [ 34.205285] BUG: Bad rss-counter state mm:000000001ea7b44b type:MM_FILEPAGES val:33 [ 34.206787] BUG: Bad rss-counter state mm:000000001ea7b44b type:MM_ANONPAGES val:22 [ 34.358537] ================================================================== [ 34.359453] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.360387] Read of size 8 at addr ffff88800f101880 by task sshd/221 [ 34.361162] [ 34.361392] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.362395] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.363368] Call Trace: [ 34.363686] [ 34.363969] dump_stack_lvl+0x91/0xf0 [ 34.364462] print_report+0xcc/0x620 [ 34.364946] ? __virt_addr_valid+0x102/0x340 [ 34.365528] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.366142] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.366767] kasan_report+0xbe/0xf0 [ 34.367237] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.367858] vma_interval_tree_remove+0xc75/0xec0 [ 34.368458] vma_prepare+0xc54/0x11a0 [ 34.368934] __split_vma+0x5af/0x950 [ 34.369420] ? __pfx___split_vma+0x10/0x10 [ 34.369944] ? find_held_lock+0x2c/0x110 [ 34.370470] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.371042] ? lock_is_held_type+0x9f/0x120 [ 34.371583] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.372191] ? mtree_range_walk+0x632/0x900 [ 34.372748] ? mas_walk+0x5c7/0x7c0 [ 34.373227] do_vmi_munmap+0x1f1/0x2b0 [ 34.373740] mmap_region+0x1f9/0x2660 [ 34.374228] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.374750] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.375465] ? __pfx_lock_acquire+0x10/0x10 [ 34.376005] ? __pfx_mmap_region+0x10/0x10 [ 34.376540] ? security_mmap_addr+0x7d/0xa0 [ 34.377071] ? get_unmapped_area+0x1f5/0x3f0 [ 34.377644] do_mmap+0x854/0xf00 [ 34.378093] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.378597] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.379166] ksys_mmap_pgoff+0x3af/0x500 [ 34.379678] do_syscall_64+0x3f/0x90 [ 34.380172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.380824] RIP: 0033:0x7f9879666d82 [ 34.381360] 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 [ 34.382912] RSP: 002b:00007fff51dbad48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.383555] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9879666d82 [ 34.384148] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9878aa0000 [ 34.384739] RBP: 00007f9878aa0000 R08: 0000000000000009 R09: 0000000000001000 [ 34.385349] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561b38e4df70 [ 34.385938] R13: 00007fff51dbad60 R14: 00007fff51dbad90 R15: 00007fff51dbb0f0 [ 34.386537] [ 34.386744] [ 34.386897] Allocated by task 214: [ 34.387200] kasan_save_stack+0x22/0x50 [ 34.387566] kasan_set_track+0x25/0x30 [ 34.387913] __kasan_slab_alloc+0x59/0x70 [ 34.388285] kmem_cache_alloc+0x16b/0x370 [ 34.388649] vm_area_dup+0x20/0x160 [ 34.388972] __split_vma+0x170/0x950 [ 34.389315] split_vma+0xc6/0x110 [ 34.389625] mprotect_fixup+0x8d2/0xb30 [ 34.389981] do_mprotect_pkey+0x87e/0xd40 [ 34.390349] __x64_sys_mprotect+0x78/0xc0 [ 34.390718] do_syscall_64+0x3f/0x90 [ 34.391053] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.391506] [ 34.391659] Freed by task 13: [ 34.391931] kasan_save_stack+0x22/0x50 [ 34.392288] kasan_set_track+0x25/0x30 [ 34.392637] kasan_save_free_info+0x2b/0x50 [ 34.393014] __kasan_slab_free+0x10a/0x190 [ 34.393404] kmem_cache_free+0x10d/0x4d0 [ 34.393762] rcu_core+0x8c8/0x2860 [ 34.394076] __do_softirq+0x1b7/0x7d4 [ 34.394411] [ 34.394565] Last potentially related work creation: [ 34.394974] kasan_save_stack+0x22/0x50 [ 34.395330] __kasan_record_aux_stack+0x8e/0xa0 [ 34.395731] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.396187] remove_vma+0x139/0x170 [ 34.396504] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.396896] do_vmi_munmap+0x1f1/0x2b0 [ 34.397239] __vm_munmap+0x138/0x3a0 [ 34.397589] __x64_sys_munmap+0x59/0x80 [ 34.397942] do_syscall_64+0x3f/0x90 [ 34.398224] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.398548] [ 34.398658] Second to last potentially related work creation: [ 34.399002] kasan_save_stack+0x22/0x50 [ 34.399263] __kasan_record_aux_stack+0x8e/0xa0 [ 34.399557] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.399881] remove_vma+0x139/0x170 [ 34.400110] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.400393] do_vmi_munmap+0x1f1/0x2b0 [ 34.400637] __vm_munmap+0x138/0x3a0 [ 34.400873] elf_map+0x26f/0x310 [ 34.401102] load_elf_binary+0xd82/0x5030 [ 34.401377] bprm_execve+0x803/0x1940 [ 34.401616] do_execveat_common+0x734/0x8e0 [ 34.401886] __x64_sys_execve+0x93/0xc0 [ 34.402142] do_syscall_64+0x3f/0x90 [ 34.402383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.402765] [ 34.402875] The buggy address belongs to the object at ffff88800f101828 [ 34.402875] which belongs to the cache vm_area_struct of size 168 [ 34.403613] The buggy address is located 88 bytes inside of [ 34.403613] freed 168-byte region [ffff88800f101828, ffff88800f1018d0) [ 34.404315] [ 34.404426] The buggy address belongs to the physical page: [ 34.404760] page:000000004594e365 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf101 [ 34.405331] memcg:ffff888019c19a01 [ 34.405546] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.405899] page_type: 0xffffffff() [ 34.406127] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 34.406592] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c19a01 [ 34.407048] page dumped because: kasan: bad access detected [ 34.407382] [ 34.407491] Memory state around the buggy address: [ 34.407782] ffff88800f101780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.408216] ffff88800f101800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.408652] >ffff88800f101880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.409086] ^ [ 34.409302] ffff88800f101900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.409736] ffff88800f101980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 34.410171] ================================================================== [ 34.410781] Disabling lock debugging due to kernel taint [ 36.245525] BUG: Bad rss-counter state mm:00000000014ecc29 type:MM_FILEPAGES val:33 [ 36.246742] BUG: Bad rss-counter state mm:00000000014ecc29 type:MM_ANONPAGES val:22 [ 36.632330] BUG: Bad rss-counter state mm:00000000f41b9643 type:MM_FILEPAGES val:33 [ 36.633719] BUG: Bad rss-counter state mm:00000000f41b9643 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57565' (ECDSA) to the list of known hosts. 2023/06/19 22:41:59 fuzzer started 2023/06/19 22:42:00 dialing manager at localhost:44161 2023/06/19 22:42:00 checking machine... 2023/06/19 22:42:00 checking revisions... [ 37.402749] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:42:00 testing simple program... [ 37.452433] cgroup: Unknown subsys name 'net' [ 37.506452] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:41:55 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff81936421 RDX=ffff88801642b680 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888016282068 RSP=ffff8880142ef9b0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000001 R13=ffff888010056000 R14=ffff8880142efa58 R15=ffff888016282068 RIP=ffffffff814c07e0 RFL=00000202 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0725672900 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=00007f0724afb430 CR3=00000000096c8000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=7f67001f9ae45e0800000000000ae988 XMM05=0707b57e555b294c00000000001367e8 XMM06=162594e9d98fe7ed00000000001355e0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff811fc523 RDX=0000000000001fc5 RSI=0000000000001fc5 RDI=ffffffff864efad4 RBP=ffff88800fe1f920 RSP=ffff88800fe1f858 R8 =0000000000000000 R9 =ffff88800fe1f908 R10=0000000000038001 R11=0000000000022999 R12=ffff88800fe1f928 R13=ffff88800fe1f910 R14=ffff88800fe1f909 R15=ffff88800fe1f8c8 RIP=ffffffff8113077a RFL=00000217 [----APC] 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 00007f2b5a9e7900 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=00007fff78739000 CR3=000000001be72000 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=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