syzkaller login: [ 205.185238] BUG: Bad rss-counter state mm:0000000013e00762 type:MM_FILEPAGES val:33 [ 205.186178] BUG: Bad rss-counter state mm:0000000013e00762 type:MM_ANONPAGES val:22 [ 205.357957] ================================================================== [ 205.358935] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 205.359879] Read of size 8 at addr ffff88800946b5c8 by task sshd/219 [ 205.360697] [ 205.360949] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 205.361969] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 205.362912] Call Trace: [ 205.363254] [ 205.363540] dump_stack_lvl+0x91/0xf0 [ 205.364035] print_report+0xcc/0x620 [ 205.364506] ? __virt_addr_valid+0x102/0x340 [ 205.365107] ? vma_interval_tree_remove+0xc75/0xec0 [ 205.365754] ? vma_interval_tree_remove+0xc75/0xec0 [ 205.366414] kasan_report+0xbe/0xf0 [ 205.366927] ? vma_interval_tree_remove+0xc75/0xec0 [ 205.367607] vma_interval_tree_remove+0xc75/0xec0 [ 205.368219] vma_prepare+0xc54/0x11a0 [ 205.368698] __split_vma+0x5af/0x950 [ 205.369207] ? __pfx___split_vma+0x10/0x10 [ 205.369763] ? find_held_lock+0x2c/0x110 [ 205.370317] do_vmi_align_munmap+0x2ba/0x11f0 [ 205.370915] ? lock_is_held_type+0x9f/0x120 [ 205.371521] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 205.372132] ? mtree_range_walk+0x632/0x900 [ 205.372699] ? mas_walk+0x5c7/0x7c0 [ 205.373217] do_vmi_munmap+0x1f1/0x2b0 [ 205.373734] mmap_region+0x1f9/0x2660 [ 205.374247] ? vm_mmap_pgoff+0x15c/0x3a0 [ 205.374773] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 205.375563] ? __pfx_lock_acquire+0x10/0x10 [ 205.376115] ? __pfx_mmap_region+0x10/0x10 [ 205.376675] ? security_mmap_addr+0x7d/0xa0 [ 205.377228] ? get_unmapped_area+0x1f5/0x3f0 [ 205.377804] do_mmap+0x854/0xf00 [ 205.378282] vm_mmap_pgoff+0x1a6/0x3a0 [ 205.378799] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 205.379416] ksys_mmap_pgoff+0x3af/0x500 [ 205.379963] do_syscall_64+0x3f/0x90 [ 205.380466] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 205.381143] RIP: 0033:0x7f7655670d82 [ 205.381624] 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 [ 205.384142] RSP: 002b:00007ffcfd32b648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 205.385380] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7655670d82 [ 205.386542] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7654aaa000 [ 205.387702] RBP: 00007f7654aaa000 R08: 0000000000000009 R09: 0000000000001000 [ 205.388647] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb89e37d90 [ 205.389569] R13: 00007ffcfd32b660 R14: 00007ffcfd32b690 R15: 00007ffcfd32b9f0 [ 205.390546] [ 205.390867] [ 205.391116] Allocated by task 212: [ 205.391589] kasan_save_stack+0x22/0x50 [ 205.392161] kasan_set_track+0x25/0x30 [ 205.392699] __kasan_slab_alloc+0x59/0x70 [ 205.393280] kmem_cache_alloc+0x16b/0x370 [ 205.393856] vm_area_dup+0x20/0x160 [ 205.394362] __split_vma+0x170/0x950 [ 205.394874] split_vma+0xc6/0x110 [ 205.395371] mprotect_fixup+0x8d2/0xb30 [ 205.395930] do_mprotect_pkey+0x87e/0xd40 [ 205.396495] __x64_sys_mprotect+0x78/0xc0 [ 205.397084] do_syscall_64+0x3f/0x90 [ 205.397600] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 205.398323] [ 205.398555] Freed by task 212: [ 205.399007] kasan_save_stack+0x22/0x50 [ 205.399587] kasan_set_track+0x25/0x30 [ 205.400160] kasan_save_free_info+0x2b/0x50 [ 205.400755] __kasan_slab_free+0x10a/0x190 [ 205.401362] kmem_cache_free+0x10d/0x4d0 [ 205.401959] rcu_core+0x8c8/0x2860 [ 205.402468] __do_softirq+0x1b7/0x7d4 [ 205.402998] [ 205.403265] Last potentially related work creation: [ 205.403935] kasan_save_stack+0x22/0x50 [ 205.404490] __kasan_record_aux_stack+0x8e/0xa0 [ 205.405145] __call_rcu_common.constprop.0+0x6a/0xb90 [ 205.405854] remove_vma+0x139/0x170 [ 205.406383] do_vmi_align_munmap+0xd4a/0x11f0 [ 205.407016] do_vmi_munmap+0x1f1/0x2b0 [ 205.407567] __vm_munmap+0x138/0x3a0 [ 205.408099] __x64_sys_munmap+0x59/0x80 [ 205.408643] do_syscall_64+0x3f/0x90 [ 205.409170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 205.409881] [ 205.410138] The buggy address belongs to the object at ffff88800946b570 [ 205.410138] which belongs to the cache vm_area_struct of size 168 [ 205.411784] The buggy address is located 88 bytes inside of [ 205.411784] freed 168-byte region [ffff88800946b570, ffff88800946b618) [ 205.413368] [ 205.413604] The buggy address belongs to the physical page: [ 205.414359] page:0000000040500ec5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x946b [ 205.415584] memcg:ffff88800eba8801 [ 205.416062] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 205.416837] page_type: 0xffffffff() [ 205.417332] raw: 0100000000000200 ffff88800879fc80 ffffea0000251a80 dead000000000005 [ 205.418377] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eba8801 [ 205.419410] page dumped because: kasan: bad access detected [ 205.420161] [ 205.420395] Memory state around the buggy address: [ 205.421054] ffff88800946b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 205.422037] ffff88800946b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 205.423010] >ffff88800946b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 205.423989] ^ [ 205.424723] ffff88800946b600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 205.425671] ffff88800946b680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 205.426634] ================================================================== [ 205.427765] Disabling lock debugging due to kernel taint [ 207.879513] BUG: Bad rss-counter state mm:000000005c064548 type:MM_FILEPAGES val:33 [ 207.880777] BUG: Bad rss-counter state mm:000000005c064548 type:MM_ANONPAGES val:22 [ 208.379711] BUG: Bad rss-counter state mm:00000000952f8baf type:MM_FILEPAGES val:33 [ 208.380727] BUG: Bad rss-counter state mm:00000000952f8baf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42383' (ECDSA) to the list of known hosts. 2023/06/19 22:37:23 fuzzer started 2023/06/19 22:37:23 dialing manager at localhost:44161 2023/06/19 22:37:23 checking machine... 2023/06/19 22:37:23 checking revisions... [ 209.127261] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:37:23 testing simple program... [ 209.178396] cgroup: Unknown subsys name 'net' [ 209.230852] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:34:28 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff888009cb9800 RCX=ffffffff83653abe RDX=fffffbfff0ba77db RSI=0000000000000001 RDI=0000000000000000 RBP=0000000000000001 RSP=ffff88800da7f970 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=ffff888009cb9800 R13=ffff888018ff5000 R14=ffff88800da7fa70 R15=0000000000000053 RIP=ffffffff814c0324 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 00007f327defc900 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=00007f09a5225650 CR3=000000000ca0c000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=d1f18e67c182808b00000000000ae988 XMM05=5f424260404828f30000000000148748 XMM06=806171799158d96700000000001471c8 XMM07=fb795ef6d65770560000000000137ae8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000000e0 RBX=00000000000000e0 RCX=0000000000000000 RDX=00000000000101f6 RSI=ffffffff821927d8 RDI=0000000000000007 RBP=ffff88800f3a01a0 RSP=ffff888008e6f7a0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f6 R11=0000000000000128 R12=00000000000101f6 R13=ffff88800f3a0050 R14=ffff88800f3a0048 R15=ffff88800f3a0060 RIP=ffffffff821927de RFL=00000093 [--S-A-C] 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 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=00007f09a4b27000 CR3=000000000c63c000 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=2032323a37333a3232203931206e754a XMM01=6964206465766965636552203a5d3832 XMM02=6f63736964203a31313a303431333420 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a37333a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000