syzkaller login: [ 30.559711] BUG: Bad rss-counter state mm:00000000ac7d738c type:MM_FILEPAGES val:33 [ 30.561681] BUG: Bad rss-counter state mm:00000000ac7d738c type:MM_ANONPAGES val:22 [ 30.731953] ================================================================== [ 30.732927] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.733930] Read of size 8 at addr ffff888015b463f8 by task sshd/220 [ 30.734798] [ 30.735092] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.736015] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.737107] Call Trace: [ 30.737449] [ 30.737775] dump_stack_lvl+0x91/0xf0 [ 30.738302] print_report+0xcc/0x620 [ 30.738832] ? __virt_addr_valid+0x102/0x340 [ 30.739419] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.740086] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.740747] kasan_report+0xbe/0xf0 [ 30.741259] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.741940] vma_interval_tree_remove+0xc75/0xec0 [ 30.742579] vma_prepare+0xc54/0x11a0 [ 30.743088] __split_vma+0x5af/0x950 [ 30.743594] ? __pfx___split_vma+0x10/0x10 [ 30.744159] ? find_held_lock+0x2c/0x110 [ 30.744738] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.745346] ? lock_is_held_type+0x9f/0x120 [ 30.745948] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.746596] ? mtree_range_walk+0x632/0x900 [ 30.747187] ? mas_walk+0x5c7/0x7c0 [ 30.747703] do_vmi_munmap+0x1f1/0x2b0 [ 30.748235] mmap_region+0x1f9/0x2660 [ 30.748750] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.749308] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.750074] ? __pfx_lock_acquire+0x10/0x10 [ 30.750637] ? __pfx_mmap_region+0x10/0x10 [ 30.751204] ? security_mmap_addr+0x7d/0xa0 [ 30.751775] ? get_unmapped_area+0x1f5/0x3f0 [ 30.752362] do_mmap+0x854/0xf00 [ 30.752833] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.753361] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.753989] ksys_mmap_pgoff+0x3af/0x500 [ 30.754529] do_syscall_64+0x3f/0x90 [ 30.755048] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.755736] RIP: 0033:0x7f12551b5d82 [ 30.756221] 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 [ 30.758505] RSP: 002b:00007fff7d73b998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.759476] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f12551b5d82 [ 30.760380] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f12545ef000 [ 30.761284] RBP: 00007f12545ef000 R08: 0000000000000009 R09: 0000000000001000 [ 30.762240] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560d2306cec0 [ 30.763157] R13: 00007fff7d73b9b0 R14: 00007fff7d73b9e0 R15: 00007fff7d73bd40 [ 30.764083] [ 30.764400] [ 30.764631] Allocated by task 213: [ 30.765094] kasan_save_stack+0x22/0x50 [ 30.765636] kasan_set_track+0x25/0x30 [ 30.766177] __kasan_slab_alloc+0x59/0x70 [ 30.766738] kmem_cache_alloc+0x16b/0x370 [ 30.767290] vm_area_dup+0x20/0x160 [ 30.767781] __split_vma+0x170/0x950 [ 30.768279] split_vma+0xc6/0x110 [ 30.768752] mprotect_fixup+0x8d2/0xb30 [ 30.769288] do_mprotect_pkey+0x87e/0xd40 [ 30.769894] __x64_sys_mprotect+0x78/0xc0 [ 30.770446] do_syscall_64+0x3f/0x90 [ 30.770966] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.771652] [ 30.771881] Freed by task 203: [ 30.772304] kasan_save_stack+0x22/0x50 [ 30.772846] kasan_set_track+0x25/0x30 [ 30.773377] kasan_save_free_info+0x2b/0x50 [ 30.773970] __kasan_slab_free+0x10a/0x190 [ 30.774539] kmem_cache_free+0x10d/0x4d0 [ 30.775088] rcu_core+0x8c8/0x2860 [ 30.775566] __do_softirq+0x1b7/0x7d4 [ 30.776082] [ 30.776380] Last potentially related work creation: [ 30.777006] kasan_save_stack+0x22/0x50 [ 30.777540] __kasan_record_aux_stack+0x8e/0xa0 [ 30.778172] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.778861] remove_vma+0x139/0x170 [ 30.779342] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.779941] do_vmi_munmap+0x1f1/0x2b0 [ 30.780469] __vm_munmap+0x138/0x3a0 [ 30.780969] __x64_sys_munmap+0x59/0x80 [ 30.781499] do_syscall_64+0x3f/0x90 [ 30.782037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.782743] [ 30.782979] Second to last potentially related work creation: [ 30.783710] kasan_save_stack+0x22/0x50 [ 30.784249] __kasan_record_aux_stack+0x8e/0xa0 [ 30.784874] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.785566] remove_vma+0x139/0x170 [ 30.786059] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.786666] __do_sys_brk+0x90d/0xc70 [ 30.787181] do_syscall_64+0x3f/0x90 [ 30.787697] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.788392] [ 30.788621] The buggy address belongs to the object at ffff888015b463a0 [ 30.788621] which belongs to the cache vm_area_struct of size 168 [ 30.790215] The buggy address is located 88 bytes inside of [ 30.790215] freed 168-byte region [ffff888015b463a0, ffff888015b46448) [ 30.791735] [ 30.791968] The buggy address belongs to the physical page: [ 30.792680] page:000000008f6c29b0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b46 [ 30.793871] memcg:ffff88800d9ba301 [ 30.794332] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.795053] page_type: 0xffffffff() [ 30.795542] raw: 0100000000000200 ffff8880087a0c80 ffffea00003928c0 0000000000000002 [ 30.796541] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9ba301 [ 30.797519] page dumped because: kasan: bad access detected [ 30.798231] [ 30.798467] Memory state around the buggy address: [ 30.799090] ffff888015b46280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.800017] ffff888015b46300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.800949] >ffff888015b46380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.801888] ^ [ 30.802802] ffff888015b46400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.803745] ffff888015b46480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.804667] ================================================================== [ 30.805744] Disabling lock debugging due to kernel taint [ 32.701561] BUG: Bad rss-counter state mm:0000000033fb6368 type:MM_FILEPAGES val:32 [ 32.702660] BUG: Bad rss-counter state mm:0000000033fb6368 type:MM_ANONPAGES val:22 [ 33.156396] BUG: Bad rss-counter state mm:00000000706188e7 type:MM_FILEPAGES val:33 [ 33.157336] BUG: Bad rss-counter state mm:00000000706188e7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33125' (ECDSA) to the list of known hosts. 2023/06/21 02:12:36 fuzzer started 2023/06/21 02:12:36 dialing manager at localhost:36067 2023/06/21 02:12:36 checking machine... 2023/06/21 02:12:36 checking revisions... [ 33.895214] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:12:36 testing simple program... [ 33.956248] cgroup: Unknown subsys name 'net' [ 34.018610] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:12:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f2b14004920 RCX=00000000000000a4 RDX=00007f2b1a44873c RSI=00007f2b1a448740 RDI=00005642b27c3570 RBP=00007f2b14004920 RSP=00007f2b1a448728 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000003 R11=0000000000000286 R12=00007f2b1a4488d0 R13=00007f2b14004920 R14=00005642b0d0fec0 R15=0000000000000000 RIP=00005642b0cc15e4 RFL=00000297 [--S-APC] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2b1a449700 00000000 00000000 GS =0000 0000000000000000 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=00007fd4be696220 CR3=000000000f696000 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=2036333a32313a3230203132206e754a XMM01=5f687373203a726f727265203a5d3833 XMM02=632079746972756365732078756e694c XMM03=742064656c696146203a656d616e7962 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a32313a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a70 RCX=0000000000000001 RDX=1ffff1100d9e1350 RSI=ffff88800ccefdc8 RDI=ffff88806cf09a80 RBP=ffff88800ccefdc8 RSP=ffff88806cf099c8 R8 =ffffffff861295f6 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000001e427 R12=0000000000000008 R13=ffff88800cce8000 R14=ffff88800ccefdd0 R15=ffff88806cf09a70 RIP=ffffffff81130468 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 00007f4e8a738900 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=00007f4e8a717020 CR3=000000000df62000 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