syzkaller login: [ 39.193287] BUG: Bad rss-counter state mm:00000000594cd90e type:MM_FILEPAGES val:33 [ 39.194556] BUG: Bad rss-counter state mm:00000000594cd90e type:MM_ANONPAGES val:22 [ 39.350070] ================================================================== [ 39.351154] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.352262] Read of size 8 at addr ffff88800d7b6140 by task sshd/224 [ 39.353344] [ 39.353606] CPU: 1 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.354627] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.355802] Call Trace: [ 39.356137] [ 39.356436] dump_stack_lvl+0x91/0xf0 [ 39.356954] print_report+0xcc/0x620 [ 39.357462] ? __virt_addr_valid+0x102/0x340 [ 39.358045] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.358693] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.359358] kasan_report+0xbe/0xf0 [ 39.359867] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.360532] vma_interval_tree_remove+0xc75/0xec0 [ 39.361183] vma_prepare+0xc54/0x11a0 [ 39.361693] __split_vma+0x5af/0x950 [ 39.362203] ? __pfx___split_vma+0x10/0x10 [ 39.362766] ? find_held_lock+0x2c/0x110 [ 39.363347] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.363951] ? lock_is_held_type+0x9f/0x120 [ 39.364527] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.365179] ? mtree_range_walk+0x632/0x900 [ 39.365769] ? mas_walk+0x5c7/0x7c0 [ 39.366281] do_vmi_munmap+0x1f1/0x2b0 [ 39.366808] mmap_region+0x1f9/0x2660 [ 39.367332] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.367874] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.368633] ? __pfx_lock_acquire+0x10/0x10 [ 39.369203] ? __pfx_mmap_region+0x10/0x10 [ 39.369770] ? security_mmap_addr+0x7d/0xa0 [ 39.370334] ? get_unmapped_area+0x1f5/0x3f0 [ 39.370931] do_mmap+0x854/0xf00 [ 39.371397] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.371920] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.372510] ksys_mmap_pgoff+0x3af/0x500 [ 39.373046] do_syscall_64+0x3f/0x90 [ 39.373551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.374241] RIP: 0033:0x7f22134c4d82 [ 39.374730] 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 [ 39.377013] RSP: 002b:00007ffce9235c28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.377965] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f22134c4d82 [ 39.378869] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f22128fe000 [ 39.379770] RBP: 00007f22128fe000 R08: 0000000000000009 R09: 0000000000001000 [ 39.380664] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bc975d8ec0 [ 39.381559] R13: 00007ffce9235c40 R14: 00007ffce9235c70 R15: 00007ffce9235fd0 [ 39.382461] [ 39.382774] [ 39.383020] Allocated by task 217: [ 39.383479] kasan_save_stack+0x22/0x50 [ 39.384021] kasan_set_track+0x25/0x30 [ 39.384544] __kasan_slab_alloc+0x59/0x70 [ 39.385098] kmem_cache_alloc+0x16b/0x370 [ 39.385648] vm_area_dup+0x20/0x160 [ 39.386136] __split_vma+0x170/0x950 [ 39.386633] split_vma+0xc6/0x110 [ 39.387110] mprotect_fixup+0x8d2/0xb30 [ 39.387647] do_mprotect_pkey+0x87e/0xd40 [ 39.388203] __x64_sys_mprotect+0x78/0xc0 [ 39.388758] do_syscall_64+0x3f/0x90 [ 39.389268] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.389949] [ 39.390175] Freed by task 217: [ 39.390585] kasan_save_stack+0x22/0x50 [ 39.391140] kasan_set_track+0x25/0x30 [ 39.391671] kasan_save_free_info+0x2b/0x50 [ 39.392258] __kasan_slab_free+0x10a/0x190 [ 39.392826] kmem_cache_free+0x10d/0x4d0 [ 39.393418] rcu_core+0x8c8/0x2860 [ 39.393889] __do_softirq+0x1b7/0x7d4 [ 39.394393] [ 39.394619] Last potentially related work creation: [ 39.395249] kasan_save_stack+0x22/0x50 [ 39.395782] __kasan_record_aux_stack+0x8e/0xa0 [ 39.396388] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.397065] remove_vma+0x139/0x170 [ 39.397550] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.398148] do_vmi_munmap+0x1f1/0x2b0 [ 39.398662] __vm_munmap+0x138/0x3a0 [ 39.399168] __x64_sys_munmap+0x59/0x80 [ 39.399689] do_syscall_64+0x3f/0x90 [ 39.400186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.400869] [ 39.401094] The buggy address belongs to the object at ffff88800d7b60e8 [ 39.401094] which belongs to the cache vm_area_struct of size 168 [ 39.402656] The buggy address is located 88 bytes inside of [ 39.402656] freed 168-byte region [ffff88800d7b60e8, ffff88800d7b6190) [ 39.404176] [ 39.404406] The buggy address belongs to the physical page: [ 39.405104] page:00000000bcef56ab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7b6 [ 39.406259] memcg:ffff8880170cab01 [ 39.406714] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.407410] page_type: 0xffffffff() [ 39.407895] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.408876] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880170cab01 [ 39.409842] page dumped because: kasan: bad access detected [ 39.410550] [ 39.410779] Memory state around the buggy address: [ 39.411421] ffff88800d7b6000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.412324] ffff88800d7b6080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 39.413230] >ffff88800d7b6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.414132] ^ [ 39.414815] ffff88800d7b6180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.415725] ffff88800d7b6200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.416620] ================================================================== [ 39.417604] Disabling lock debugging due to kernel taint [ 40.951139] BUG: Bad rss-counter state mm:00000000b4db77b0 type:MM_FILEPAGES val:33 [ 40.952225] BUG: Bad rss-counter state mm:00000000b4db77b0 type:MM_ANONPAGES val:22 [ 41.476951] BUG: Bad rss-counter state mm:0000000060bf8d00 type:MM_FILEPAGES val:33 [ 41.478505] BUG: Bad rss-counter state mm:0000000060bf8d00 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40773' (ECDSA) to the list of known hosts. 2023/06/20 00:14:42 fuzzer started 2023/06/20 00:14:42 dialing manager at localhost:44161 2023/06/20 00:14:42 checking machine... 2023/06/20 00:14:42 checking revisions... [ 42.198359] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:14:42 testing simple program... [ 42.253091] cgroup: Unknown subsys name 'net' [ 42.301355] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:14:41 Registers: info registers vcpu 0 RAX=0008060004040104 RBX=00007fe8eba0f000 RCX=0000000000000002 RDX=0000000000000061 RSI=1105080130102020 RDI=000000006d5e3094 RBP=0000000000000007 RSP=00007fff2dc29db0 R8 =00007fff2dc29ef0 R9 =00007fe8ebe40440 R10=00007fe8ebb8c320 R11=000000000000001f R12=000000000000001f R13=00007fe8eb2a2100 R14=0000000000000001 R15=0000000000000000 RIP=00007fe8ebe1e0b8 RFL=00000202 [-------] 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 00007fe8eb29d900 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=00007fe8eb8536c0 CR3=000000000d77a000 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=0000000000000000000000ff00000000 XMM01=000000000000000000000000ffffffff XMM02=315f315f4c53534e45504f00305f315f XMM03=000000000000000000004f00305f315f XMM04=504f0061305f315f315f4c53534e4550 XMM05=00007fe8eb856f6000007fe8eba10950 XMM06=00007fe8eba1044000007fe8eba0ff20 XMM07=00007fe8eb35a12000007fe8eb359b10 XMM08=00007fe8eb3595f000007fe8eb359060 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016c07f01 RSI=ffff888016c07f48 RDI=ffff888016c07f48 RBP=ffff888016c07730 RSP=ffff888016c07668 R8 =0000000000000001 R9 =ffff888016c07718 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff888016c07738 R13=ffff888016c07720 R14=ffff888016c07f48 R15=ffff888016c076d8 RIP=ffffffff81131236 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 00007fe4800e2900 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=00007fe480087008 CR3=000000000e838000 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