syzkaller login: [ 30.120265] BUG: Bad rss-counter state mm:000000005f84946f type:MM_FILEPAGES val:33 [ 30.121565] BUG: Bad rss-counter state mm:000000005f84946f type:MM_ANONPAGES val:22 [ 30.278796] ================================================================== [ 30.279739] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.280841] Read of size 8 at addr ffff88800dc5bd08 by task sshd/221 [ 30.281665] [ 30.281883] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.282779] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.283741] Call Trace: [ 30.284062] [ 30.284349] dump_stack_lvl+0x91/0xf0 [ 30.284841] print_report+0xcc/0x620 [ 30.285348] ? __virt_addr_valid+0x102/0x340 [ 30.285916] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.286539] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.287153] kasan_report+0xbe/0xf0 [ 30.287626] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.288255] vma_interval_tree_remove+0xc75/0xec0 [ 30.288869] vma_prepare+0xc54/0x11a0 [ 30.289360] __split_vma+0x5af/0x950 [ 30.289840] ? __pfx___split_vma+0x10/0x10 [ 30.290367] ? find_held_lock+0x2c/0x110 [ 30.290885] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.291452] ? lock_is_held_type+0x9f/0x120 [ 30.291985] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.292586] ? mtree_range_walk+0x632/0x900 [ 30.293155] ? mas_walk+0x5c7/0x7c0 [ 30.293625] do_vmi_munmap+0x1f1/0x2b0 [ 30.294111] mmap_region+0x1f9/0x2660 [ 30.294586] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.295093] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.295797] ? __pfx_lock_acquire+0x10/0x10 [ 30.296327] ? __pfx_mmap_region+0x10/0x10 [ 30.296851] ? security_mmap_addr+0x7d/0xa0 [ 30.297387] ? get_unmapped_area+0x1f5/0x3f0 [ 30.297936] do_mmap+0x854/0xf00 [ 30.298376] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.298870] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.299434] ksys_mmap_pgoff+0x3af/0x500 [ 30.299944] do_syscall_64+0x3f/0x90 [ 30.300425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.301074] RIP: 0033:0x7f7742c0ad82 [ 30.301534] 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 [ 30.303639] RSP: 002b:00007ffedc3fcb38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.304544] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7742c0ad82 [ 30.305413] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7742044000 [ 30.306253] RBP: 00007f7742044000 R08: 0000000000000009 R09: 0000000000001000 [ 30.307087] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e95601cec0 [ 30.307933] R13: 00007ffedc3fcb50 R14: 00007ffedc3fcb80 R15: 00007ffedc3fcee0 [ 30.308804] [ 30.309104] [ 30.309319] Allocated by task 213: [ 30.309752] kasan_save_stack+0x22/0x50 [ 30.310261] kasan_set_track+0x25/0x30 [ 30.310759] __kasan_slab_alloc+0x59/0x70 [ 30.311285] kmem_cache_alloc+0x16b/0x370 [ 30.311814] vm_area_dup+0x20/0x160 [ 30.312266] __split_vma+0x170/0x950 [ 30.312738] split_vma+0xc6/0x110 [ 30.313178] mprotect_fixup+0x8d2/0xb30 [ 30.313695] do_mprotect_pkey+0x87e/0xd40 [ 30.314211] __x64_sys_mprotect+0x78/0xc0 [ 30.314727] do_syscall_64+0x3f/0x90 [ 30.315204] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.315851] [ 30.316064] Freed by task 213: [ 30.316458] kasan_save_stack+0x22/0x50 [ 30.316982] kasan_set_track+0x25/0x30 [ 30.317476] kasan_save_free_info+0x2b/0x50 [ 30.318010] __kasan_slab_free+0x10a/0x190 [ 30.318538] kmem_cache_free+0x10d/0x4d0 [ 30.319042] rcu_core+0x8c8/0x2860 [ 30.319484] __do_softirq+0x1b7/0x7d4 [ 30.319958] [ 30.320176] Last potentially related work creation: [ 30.320762] kasan_save_stack+0x22/0x50 [ 30.321307] __kasan_record_aux_stack+0x8e/0xa0 [ 30.321879] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.322521] remove_vma+0x139/0x170 [ 30.322970] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.323518] do_vmi_munmap+0x1f1/0x2b0 [ 30.323998] __vm_munmap+0x138/0x3a0 [ 30.324459] __x64_sys_munmap+0x59/0x80 [ 30.324974] do_syscall_64+0x3f/0x90 [ 30.325451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.326088] [ 30.326302] The buggy address belongs to the object at ffff88800dc5bcb0 [ 30.326302] which belongs to the cache vm_area_struct of size 168 [ 30.327846] The buggy address is located 88 bytes inside of [ 30.327846] freed 168-byte region [ffff88800dc5bcb0, ffff88800dc5bd58) [ 30.329286] [ 30.329501] The buggy address belongs to the physical page: [ 30.330152] page:000000005a49a058 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc5b [ 30.331223] memcg:ffff88800cb3ef01 [ 30.331641] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.332330] page_type: 0xffffffff() [ 30.332776] raw: 0100000000000200 ffff8880087a0c80 ffffea0000392840 dead000000000005 [ 30.333699] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb3ef01 [ 30.334595] page dumped because: kasan: bad access detected [ 30.335267] [ 30.335483] Memory state around the buggy address: [ 30.336066] ffff88800dc5bc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.336933] ffff88800dc5bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.337778] >ffff88800dc5bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.338612] ^ [ 30.339043] ffff88800dc5bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.339888] ffff88800dc5be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.340733] ================================================================== [ 30.341699] Disabling lock debugging due to kernel taint [ 32.521716] BUG: Bad rss-counter state mm:00000000e95c6c56 type:MM_FILEPAGES val:33 [ 32.523288] BUG: Bad rss-counter state mm:00000000e95c6c56 type:MM_ANONPAGES val:22 [ 32.987918] BUG: Bad rss-counter state mm:00000000dc237b03 type:MM_FILEPAGES val:33 [ 32.988911] BUG: Bad rss-counter state mm:00000000dc237b03 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8682' (ECDSA) to the list of known hosts. 2023/06/21 03:48:18 fuzzer started 2023/06/21 03:48:18 dialing manager at localhost:36067 2023/06/21 03:48:18 checking machine... 2023/06/21 03:48:18 checking revisions... [ 33.729220] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:48:18 testing simple program... [ 33.779111] cgroup: Unknown subsys name 'net' [ 33.829397] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:48:18 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f32dd376fe0 CR3=00000000097ea000 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=2037313a38343a3330203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a38343a3330203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0ff2f06 RBX=ffffffff87f97640 RCX=0000000000000000 RDX=ffff88800d420000 RSI=ffffffff83ab18a9 RDI=ffffffff87f97830 RBP=0000000000000000 RSP=ffff88800cf4f508 R8 =0000000000000005 R9 =00000000000000ff R10=00000000000000a3 R11=0000092c0000092c R12=0000000000000000 R13=00000000000000a3 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff83ab18c4 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 00007f50947ea900 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=00007fff6d3ae000 CR3=000000000c4c4000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000