syzkaller login: [ 33.735445] BUG: Bad rss-counter state mm:00000000255cdafb type:MM_FILEPAGES val:33 [ 33.737018] BUG: Bad rss-counter state mm:00000000255cdafb type:MM_ANONPAGES val:22 [ 33.896581] ================================================================== [ 33.897481] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.898429] Read of size 8 at addr ffff88800e9c83f8 by task sshd/222 [ 33.899206] [ 33.899423] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.900400] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.901416] Call Trace: [ 33.901735] [ 33.902016] dump_stack_lvl+0x91/0xf0 [ 33.902502] print_report+0xcc/0x620 [ 33.903043] ? __virt_addr_valid+0x102/0x340 [ 33.903600] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.904216] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.904837] kasan_report+0xbe/0xf0 [ 33.905320] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.905946] vma_interval_tree_remove+0xc75/0xec0 [ 33.906552] vma_prepare+0xc54/0x11a0 [ 33.907041] __split_vma+0x5af/0x950 [ 33.907515] ? __pfx___split_vma+0x10/0x10 [ 33.908042] ? find_held_lock+0x2c/0x110 [ 33.908573] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.909137] ? lock_is_held_type+0x9f/0x120 [ 33.909677] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.910287] ? mtree_range_walk+0x632/0x900 [ 33.910839] ? mas_walk+0x5c7/0x7c0 [ 33.911313] do_vmi_munmap+0x1f1/0x2b0 [ 33.911801] mmap_region+0x1f9/0x2660 [ 33.912286] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.912798] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.913511] ? __pfx_lock_acquire+0x10/0x10 [ 33.914047] ? __pfx_mmap_region+0x10/0x10 [ 33.914578] ? security_mmap_addr+0x7d/0xa0 [ 33.915123] ? get_unmapped_area+0x1f5/0x3f0 [ 33.915675] do_mmap+0x854/0xf00 [ 33.916115] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.916613] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.917177] ksys_mmap_pgoff+0x3af/0x500 [ 33.917688] do_syscall_64+0x3f/0x90 [ 33.918168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.918813] RIP: 0033:0x7f8f1fafdd82 [ 33.919281] 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 [ 33.921389] RSP: 002b:00007ffc5bf0d4a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.922310] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8f1fafdd82 [ 33.923165] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8f1ef37000 [ 33.924010] RBP: 00007f8f1ef37000 R08: 0000000000000009 R09: 0000000000001000 [ 33.924868] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558dae9deec0 [ 33.925735] R13: 00007ffc5bf0d4c0 R14: 00007ffc5bf0d4f0 R15: 00007ffc5bf0d850 [ 33.926605] [ 33.926896] [ 33.927128] Allocated by task 214: [ 33.927562] kasan_save_stack+0x22/0x50 [ 33.928071] kasan_set_track+0x25/0x30 [ 33.928556] __kasan_slab_alloc+0x59/0x70 [ 33.929071] kmem_cache_alloc+0x16b/0x370 [ 33.929582] vm_area_dup+0x20/0x160 [ 33.930039] __split_vma+0x170/0x950 [ 33.930505] split_vma+0xc6/0x110 [ 33.930945] mprotect_fixup+0x8d2/0xb30 [ 33.931450] do_mprotect_pkey+0x87e/0xd40 [ 33.931969] __x64_sys_mprotect+0x78/0xc0 [ 33.932484] do_syscall_64+0x3f/0x90 [ 33.932956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.933600] [ 33.933820] Freed by task 211: [ 33.934214] kasan_save_stack+0x22/0x50 [ 33.934720] kasan_set_track+0x25/0x30 [ 33.935232] kasan_save_free_info+0x2b/0x50 [ 33.935766] __kasan_slab_free+0x10a/0x190 [ 33.936300] kmem_cache_free+0x10d/0x4d0 [ 33.936808] rcu_core+0x8c8/0x2860 [ 33.937252] __do_softirq+0x1b7/0x7d4 [ 33.937730] [ 33.937941] Last potentially related work creation: [ 33.938532] kasan_save_stack+0x22/0x50 [ 33.939042] __kasan_record_aux_stack+0x8e/0xa0 [ 33.939618] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.940256] remove_vma+0x139/0x170 [ 33.940704] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.941310] do_vmi_munmap+0x1f1/0x2b0 [ 33.941810] __vm_munmap+0x138/0x3a0 [ 33.942277] __x64_sys_munmap+0x59/0x80 [ 33.942775] do_syscall_64+0x3f/0x90 [ 33.943267] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.943904] [ 33.944121] The buggy address belongs to the object at ffff88800e9c83a0 [ 33.944121] which belongs to the cache vm_area_struct of size 168 [ 33.945592] The buggy address is located 88 bytes inside of [ 33.945592] freed 168-byte region [ffff88800e9c83a0, ffff88800e9c8448) [ 33.947000] [ 33.947213] The buggy address belongs to the physical page: [ 33.947875] page:00000000fcd8b701 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9c8 [ 33.948954] memcg:ffff88800e6a4d01 [ 33.949383] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.950076] page_type: 0xffffffff() [ 33.950527] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 33.951485] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6a4d01 [ 33.952389] page dumped because: kasan: bad access detected [ 33.953044] [ 33.953263] Memory state around the buggy address: [ 33.953837] ffff88800e9c8280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 33.954693] ffff88800e9c8300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 33.955566] >ffff88800e9c8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.956420] ^ [ 33.957272] ffff88800e9c8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.958122] ffff88800e9c8480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.958992] ================================================================== [ 33.959908] Disabling lock debugging due to kernel taint [ 36.635030] BUG: Bad rss-counter state mm:0000000035e7a03a type:MM_FILEPAGES val:33 [ 36.636052] BUG: Bad rss-counter state mm:0000000035e7a03a type:MM_ANONPAGES val:22 [ 37.170024] BUG: Bad rss-counter state mm:00000000e8fb5c78 type:MM_FILEPAGES val:33 [ 37.171262] BUG: Bad rss-counter state mm:00000000e8fb5c78 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10223' (ECDSA) to the list of known hosts. 2023/06/19 15:12:34 fuzzer started 2023/06/19 15:12:34 dialing manager at localhost:44161 2023/06/19 15:12:34 checking machine... 2023/06/19 15:12:34 checking revisions... [ 37.813459] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:12:34 testing simple program... [ 37.864557] cgroup: Unknown subsys name 'net' [ 37.944425] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:12:31 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffed100319efa1 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff888018cf7cf8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8fe1 RFL=00000282 [--S----] 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 00007f3687e92900 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=00007ffec94a7adc CR3=000000000e6ac000 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=00000000000000000000000000000000 XMM02=c5ce456573f998b6beb7ccfb907ad3f4 XMM03=59b3e7d9807c5971df88e57670cb61ee XMM04=2b17727da65a44f29e83f651b32c3be4 XMM05=00000000000000000000000000000000 XMM06=2b17727d805a44719e83e551702c3be4 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f2572fcbcc0 CR3=000000000e05c000 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=12b28c16a80cdaaab4426df902b1c56a XMM02=2c67c8bc2e329bc3000000000011f2c8 XMM03=fb795ef6d65770560000000000123990 XMM04=0e5d62026a984f3600000000000ae988 XMM05=314bbd5adec7685f0000000000134398 XMM06=c291bd5c70af25b90000000000133438 XMM07=e042d86d42eb936e0000000000123c10 XMM08=0cdf2946ddba8b73000000000011f328 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000