syzkaller login: [ 64.071845] BUG: Bad rss-counter state mm:00000000936853f2 type:MM_FILEPAGES val:33 [ 64.073546] BUG: Bad rss-counter state mm:00000000936853f2 type:MM_ANONPAGES val:22 [ 64.239091] ================================================================== [ 64.240264] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 64.241643] Read of size 8 at addr ffff88800e02f880 by task sshd/220 [ 64.242692] [ 64.242980] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 64.244118] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 64.245428] Call Trace: [ 64.245871] [ 64.246251] dump_stack_lvl+0x91/0xf0 [ 64.246804] print_report+0xcc/0x620 [ 64.247345] ? __virt_addr_valid+0x102/0x340 [ 64.247956] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.248643] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.249325] kasan_report+0xbe/0xf0 [ 64.249861] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.250566] vma_interval_tree_remove+0xc75/0xec0 [ 64.251232] vma_prepare+0xc54/0x11a0 [ 64.251755] __split_vma+0x5af/0x950 [ 64.252272] ? __pfx___split_vma+0x10/0x10 [ 64.252851] ? find_held_lock+0x2c/0x110 [ 64.253419] do_vmi_align_munmap+0x2ba/0x11f0 [ 64.254077] ? lock_is_held_type+0x9f/0x120 [ 64.254669] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 64.255335] ? mtree_range_walk+0x632/0x900 [ 64.255941] ? mas_walk+0x5c7/0x7c0 [ 64.256481] do_vmi_munmap+0x1f1/0x2b0 [ 64.257030] mmap_region+0x1f9/0x2660 [ 64.257563] ? vm_mmap_pgoff+0x15c/0x3a0 [ 64.258162] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 64.258940] ? __pfx_lock_acquire+0x10/0x10 [ 64.259525] ? __pfx_mmap_region+0x10/0x10 [ 64.260101] ? security_mmap_addr+0x7d/0xa0 [ 64.260680] ? get_unmapped_area+0x1f5/0x3f0 [ 64.261279] do_mmap+0x854/0xf00 [ 64.261758] vm_mmap_pgoff+0x1a6/0x3a0 [ 64.262341] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 64.262958] ksys_mmap_pgoff+0x3af/0x500 [ 64.263512] do_syscall_64+0x3f/0x90 [ 64.264032] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.264738] RIP: 0033:0x7fe2bc5f3d82 [ 64.265244] 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 [ 64.267591] RSP: 002b:00007ffe80820bd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 64.268574] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe2bc5f3d82 [ 64.269488] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe2bba2d000 [ 64.270431] RBP: 00007fe2bba2d000 R08: 0000000000000009 R09: 0000000000001000 [ 64.271355] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555790bb5ec0 [ 64.272281] R13: 00007ffe80820bf0 R14: 00007ffe80820c20 R15: 00007ffe80820f80 [ 64.273224] [ 64.273543] [ 64.273782] Allocated by task 213: [ 64.274288] kasan_save_stack+0x22/0x50 [ 64.274841] kasan_set_track+0x25/0x30 [ 64.275384] __kasan_slab_alloc+0x59/0x70 [ 64.275964] kmem_cache_alloc+0x16b/0x370 [ 64.276526] vm_area_dup+0x20/0x160 [ 64.277025] __split_vma+0x170/0x950 [ 64.277535] split_vma+0xc6/0x110 [ 64.278064] mprotect_fixup+0x8d2/0xb30 [ 64.278614] do_mprotect_pkey+0x87e/0xd40 [ 64.279174] __x64_sys_mprotect+0x78/0xc0 [ 64.279743] do_syscall_64+0x3f/0x90 [ 64.280257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.280949] [ 64.281184] Freed by task 213: [ 64.281610] kasan_save_stack+0x22/0x50 [ 64.282287] kasan_set_track+0x25/0x30 [ 64.282846] kasan_save_free_info+0x2b/0x50 [ 64.283432] __kasan_slab_free+0x10a/0x190 [ 64.284015] kmem_cache_free+0x10d/0x4d0 [ 64.284567] rcu_core+0x8c8/0x2860 [ 64.285056] __do_softirq+0x1b7/0x7d4 [ 64.285569] [ 64.285804] Last potentially related work creation: [ 64.286481] kasan_save_stack+0x22/0x50 [ 64.287027] __kasan_record_aux_stack+0x8e/0xa0 [ 64.287658] __call_rcu_common.constprop.0+0x6a/0xb90 [ 64.288357] remove_vma+0x139/0x170 [ 64.288852] do_vmi_align_munmap+0xd4a/0x11f0 [ 64.289461] do_vmi_munmap+0x1f1/0x2b0 [ 64.290024] __vm_munmap+0x138/0x3a0 [ 64.290541] __x64_sys_munmap+0x59/0x80 [ 64.291094] do_syscall_64+0x3f/0x90 [ 64.291631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.292347] [ 64.292586] Second to last potentially related work creation: [ 64.293353] kasan_save_stack+0x22/0x50 [ 64.293955] __kasan_record_aux_stack+0x8e/0xa0 [ 64.294602] __call_rcu_common.constprop.0+0x6a/0xb90 [ 64.295326] remove_vma+0x139/0x170 [ 64.295834] do_vmi_align_munmap+0xd4a/0x11f0 [ 64.296453] do_vmi_munmap+0x1f1/0x2b0 [ 64.297001] mmap_region+0x1f9/0x2660 [ 64.297550] do_mmap+0x854/0xf00 [ 64.298069] vm_mmap_pgoff+0x1a6/0x3a0 [ 64.298630] ksys_mmap_pgoff+0x3af/0x500 [ 64.299214] do_syscall_64+0x3f/0x90 [ 64.299765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.300514] [ 64.300763] The buggy address belongs to the object at ffff88800e02f828 [ 64.300763] which belongs to the cache vm_area_struct of size 168 [ 64.302504] The buggy address is located 88 bytes inside of [ 64.302504] freed 168-byte region [ffff88800e02f828, ffff88800e02f8d0) [ 64.304142] [ 64.304389] The buggy address belongs to the physical page: [ 64.305159] page:000000007e4b24b9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe02f [ 64.306458] memcg:ffff88800e6ae901 [ 64.306953] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 64.307772] page_type: 0xffffffff() [ 64.308297] raw: 0100000000000200 ffff88800879fc80 ffffea0000388e80 dead000000000007 [ 64.309366] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6ae901 [ 64.310445] page dumped because: kasan: bad access detected [ 64.311216] [ 64.311468] Memory state around the buggy address: [ 64.312142] ffff88800e02f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 64.313140] ffff88800e02f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 64.314180] >ffff88800e02f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 64.315175] ^ [ 64.315650] ffff88800e02f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.316659] ffff88800e02f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 64.317657] ================================================================== [ 64.318748] Disabling lock debugging due to kernel taint [ 66.448821] BUG: Bad rss-counter state mm:00000000b69c4451 type:MM_FILEPAGES val:33 [ 66.449804] BUG: Bad rss-counter state mm:00000000b69c4451 type:MM_ANONPAGES val:22 [ 66.970935] BUG: Bad rss-counter state mm:00000000c319f01e type:MM_FILEPAGES val:33 [ 66.971941] BUG: Bad rss-counter state mm:00000000c319f01e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7809' (ECDSA) to the list of known hosts. 2023/06/20 00:52:56 fuzzer started 2023/06/20 00:52:57 dialing manager at localhost:44161 2023/06/20 00:52:57 checking machine... 2023/06/20 00:52:57 checking revisions... [ 67.697770] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:52:57 testing simple program... [ 67.735216] cgroup: Unknown subsys name 'net' [ 67.797964] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:52:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888008d7fa10 RCX=0000000000000005 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff888008d7f9b8 RBP=ffff888008d70000 RSP=ffff888008d7f920 R8 =0000000000000002 R9 =0000000000000000 R10=ffff888008d7f978 R11=0000000000000128 R12=0000000000000000 R13=ffff888008d7f9a0 R14=ffff888008d70000 R15=ffff888008d7f978 RIP=ffffffff8450d445 RFL=00000206 [-----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=00007f4aa04021f0 CR3=00000000144e4000 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=2036353a32353a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a32353a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff7fffffffffff RBX=0000000000000001 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11002b23e61 RSP=ffff88801591f2d8 R8 =0000000000000000 R9 =0000000000000246 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff856d8238 R13=ffffffff8180a7a4 R14=0000000000002800 R15=0000000000000000 RIP=ffffffff8180eef9 RFL=00000016 [----AP-] 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 00007fdaa6abd900 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=00007fdaa6a9c020 CR3=0000000017f8e000 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=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