syzkaller login: [ 39.677095] BUG: Bad rss-counter state mm:00000000c01b42bc type:MM_FILEPAGES val:33 [ 39.679221] BUG: Bad rss-counter state mm:00000000c01b42bc type:MM_ANONPAGES val:22 [ 39.853914] ================================================================== [ 39.854859] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.855793] Read of size 8 at addr ffff888018d9e310 by task sshd/225 [ 39.856568] [ 39.856787] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.857790] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.858777] Call Trace: [ 39.859102] [ 39.859390] dump_stack_lvl+0x91/0xf0 [ 39.859880] print_report+0xcc/0x620 [ 39.860360] ? __virt_addr_valid+0x102/0x340 [ 39.860916] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.861527] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.862152] kasan_report+0xbe/0xf0 [ 39.862634] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.863251] vma_interval_tree_remove+0xc75/0xec0 [ 39.863854] vma_prepare+0xc54/0x11a0 [ 39.864329] __split_vma+0x5af/0x950 [ 39.864812] ? __pfx___split_vma+0x10/0x10 [ 39.865337] ? find_held_lock+0x2c/0x110 [ 39.865858] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.866438] ? lock_is_held_type+0x9f/0x120 [ 39.866971] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.867571] ? mtree_range_walk+0x632/0x900 [ 39.868123] ? mas_walk+0x5c7/0x7c0 [ 39.868592] do_vmi_munmap+0x1f1/0x2b0 [ 39.869084] mmap_region+0x1f9/0x2660 [ 39.869561] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.870070] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.870790] ? __pfx_lock_acquire+0x10/0x10 [ 39.871320] ? __pfx_mmap_region+0x10/0x10 [ 39.871845] ? security_mmap_addr+0x7d/0xa0 [ 39.872370] ? get_unmapped_area+0x1f5/0x3f0 [ 39.872910] do_mmap+0x854/0xf00 [ 39.873343] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.873837] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.874399] ksys_mmap_pgoff+0x3af/0x500 [ 39.874904] do_syscall_64+0x3f/0x90 [ 39.875384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.876023] RIP: 0033:0x7ff4f9dadd82 [ 39.876473] 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 [ 39.878614] RSP: 002b:00007ffe1ce24cd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.879540] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff4f9dadd82 [ 39.880378] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff4f91e7000 [ 39.881232] RBP: 00007ff4f91e7000 R08: 0000000000000009 R09: 0000000000001000 [ 39.882073] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558096b4dec0 [ 39.882915] R13: 00007ffe1ce24cf0 R14: 00007ffe1ce24d20 R15: 00007ffe1ce25080 [ 39.883766] [ 39.884066] [ 39.884278] Allocated by task 218: [ 39.884703] kasan_save_stack+0x22/0x50 [ 39.885201] kasan_set_track+0x25/0x30 [ 39.885689] __kasan_slab_alloc+0x59/0x70 [ 39.886207] kmem_cache_alloc+0x16b/0x370 [ 39.886737] vm_area_dup+0x20/0x160 [ 39.887187] __split_vma+0x170/0x950 [ 39.887646] split_vma+0xc6/0x110 [ 39.888079] mprotect_fixup+0x8d2/0xb30 [ 39.888584] do_mprotect_pkey+0x87e/0xd40 [ 39.889116] __x64_sys_mprotect+0x78/0xc0 [ 39.889645] do_syscall_64+0x3f/0x90 [ 39.890119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.890789] [ 39.891002] Freed by task 218: [ 39.891398] kasan_save_stack+0x22/0x50 [ 39.891904] kasan_set_track+0x25/0x30 [ 39.892407] kasan_save_free_info+0x2b/0x50 [ 39.892945] __kasan_slab_free+0x10a/0x190 [ 39.893476] kmem_cache_free+0x10d/0x4d0 [ 39.893979] rcu_core+0x8c8/0x2860 [ 39.894440] __do_softirq+0x1b7/0x7d4 [ 39.894913] [ 39.895131] Last potentially related work creation: [ 39.895722] kasan_save_stack+0x22/0x50 [ 39.896226] __kasan_record_aux_stack+0x8e/0xa0 [ 39.896807] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.897514] remove_vma+0x139/0x170 [ 39.897962] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.898524] do_vmi_munmap+0x1f1/0x2b0 [ 39.899010] __vm_munmap+0x138/0x3a0 [ 39.899470] __x64_sys_munmap+0x59/0x80 [ 39.899971] do_syscall_64+0x3f/0x90 [ 39.900441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.901079] [ 39.901291] The buggy address belongs to the object at ffff888018d9e2b8 [ 39.901291] which belongs to the cache vm_area_struct of size 168 [ 39.902746] The buggy address is located 88 bytes inside of [ 39.902746] freed 168-byte region [ffff888018d9e2b8, ffff888018d9e360) [ 39.904145] [ 39.904359] The buggy address belongs to the physical page: [ 39.905014] page:000000003e97aacd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18d9e [ 39.906094] memcg:ffff888019d70d01 [ 39.906533] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.907186] page_type: 0xffffffff() [ 39.907631] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.908538] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d70d01 [ 39.909449] page dumped because: kasan: bad access detected [ 39.910111] [ 39.910334] Memory state around the buggy address: [ 39.910905] ffff888018d9e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 39.911756] ffff888018d9e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.912612] >ffff888018d9e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.913457] ^ [ 39.913919] ffff888018d9e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.914798] ffff888018d9e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.915649] ================================================================== [ 39.916767] Disabling lock debugging due to kernel taint [ 41.881052] BUG: Bad rss-counter state mm:000000008a986aaa type:MM_FILEPAGES val:33 [ 41.882229] BUG: Bad rss-counter state mm:000000008a986aaa type:MM_ANONPAGES val:22 [ 42.428973] BUG: Bad rss-counter state mm:00000000f76bb306 type:MM_FILEPAGES val:33 [ 42.430139] BUG: Bad rss-counter state mm:00000000f76bb306 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23533' (ECDSA) to the list of known hosts. 2023/06/19 23:44:50 fuzzer started 2023/06/19 23:44:50 dialing manager at localhost:44161 2023/06/19 23:44:50 checking machine... 2023/06/19 23:44:50 checking revisions... [ 43.073632] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:44:50 testing simple program... [ 43.116109] cgroup: Unknown subsys name 'net' [ 43.172058] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:44:49 Registers: info registers vcpu 0 RAX=ffffffff83640961 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800d92ff01 RSI=ffff88800d92ff00 RDI=ffff88800d92ff00 RBP=ffff88800d92f550 RSP=ffff88800d92f488 R8 =ffffffff863b22f4 R9 =ffff88800d92f538 R10=0000000000038001 R11=000000000008aa86 R12=ffff88800d92f558 R13=ffff88800d92f540 R14=ffff88800d92ff08 R15=ffff88800d92f4f8 RIP=ffffffff81131041 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8533cad900 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=000055927c485560 CR3=000000000e4ba000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88801438f5b0 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801438f401 RSI=ffff88801438f4e8 RDI=ffff88801438f4e8 RBP=ffff88801438f570 RSP=ffff88801438f450 R8 =0000000000000001 R9 =ffff88801438f558 R10=0000000000038001 R11=0000000000006097 R12=ffff88801438f578 R13=ffff88801438f560 R14=ffff88801438f4e8 R15=ffff88801438f518 RIP=ffffffff8112fbf3 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 00007f1c8343f900 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=00007f1c82884640 CR3=000000000d740000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=13fd61cfa359636000000000000ae988 XMM05=01b5000a6cac0c880000000000135030 XMM06=e7a3b750822471340000000000133e08 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000