syzkaller login: [ 31.063049] BUG: Bad rss-counter state mm:00000000b0a44c45 type:MM_FILEPAGES val:33 [ 31.064020] BUG: Bad rss-counter state mm:00000000b0a44c45 type:MM_ANONPAGES val:22 [ 31.227796] ================================================================== [ 31.228889] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.230079] Read of size 8 at addr ffff88800ec11968 by task sshd/218 [ 31.230865] [ 31.231089] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.231987] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.232990] Call Trace: [ 31.233316] [ 31.233602] dump_stack_lvl+0x91/0xf0 [ 31.234124] print_report+0xcc/0x620 [ 31.234620] ? __virt_addr_valid+0x102/0x340 [ 31.235188] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.235825] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.236453] kasan_report+0xbe/0xf0 [ 31.236937] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.237563] vma_interval_tree_remove+0xc75/0xec0 [ 31.238185] vma_prepare+0xc54/0x11a0 [ 31.238679] __split_vma+0x5af/0x950 [ 31.239161] ? __pfx___split_vma+0x10/0x10 [ 31.239703] ? find_held_lock+0x2c/0x110 [ 31.240231] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.240813] ? lock_is_held_type+0x9f/0x120 [ 31.241365] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.241994] ? mtree_range_walk+0x632/0x900 [ 31.242553] ? mas_walk+0x5c7/0x7c0 [ 31.243037] do_vmi_munmap+0x1f1/0x2b0 [ 31.243541] mmap_region+0x1f9/0x2660 [ 31.244042] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.244565] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.245287] ? __pfx_lock_acquire+0x10/0x10 [ 31.245836] ? __pfx_mmap_region+0x10/0x10 [ 31.246386] ? security_mmap_addr+0x7d/0xa0 [ 31.246926] ? get_unmapped_area+0x1f5/0x3f0 [ 31.247486] do_mmap+0x854/0xf00 [ 31.247933] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.248445] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.249018] ksys_mmap_pgoff+0x3af/0x500 [ 31.249533] do_syscall_64+0x3f/0x90 [ 31.250037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.250696] RIP: 0033:0x7f58c799ad82 [ 31.251165] 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 [ 31.253359] RSP: 002b:00007ffe4fb2a5d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.254319] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f58c799ad82 [ 31.255193] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f58c6dd4000 [ 31.256145] RBP: 00007f58c6dd4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.257157] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a933e31ec0 [ 31.258210] R13: 00007ffe4fb2a5f0 R14: 00007ffe4fb2a620 R15: 00007ffe4fb2a980 [ 31.259154] [ 31.259456] [ 31.259677] Allocated by task 211: [ 31.260129] kasan_save_stack+0x22/0x50 [ 31.260652] kasan_set_track+0x25/0x30 [ 31.261152] __kasan_slab_alloc+0x59/0x70 [ 31.261705] kmem_cache_alloc+0x16b/0x370 [ 31.262240] vm_area_dup+0x20/0x160 [ 31.262711] __split_vma+0x170/0x950 [ 31.263188] split_vma+0xc6/0x110 [ 31.263649] mprotect_fixup+0x8d2/0xb30 [ 31.264154] do_mprotect_pkey+0x87e/0xd40 [ 31.264685] __x64_sys_mprotect+0x78/0xc0 [ 31.265215] do_syscall_64+0x3f/0x90 [ 31.265704] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.266362] [ 31.266584] Freed by task 19: [ 31.266983] kasan_save_stack+0x22/0x50 [ 31.267491] kasan_set_track+0x25/0x30 [ 31.267992] kasan_save_free_info+0x2b/0x50 [ 31.268532] __kasan_slab_free+0x10a/0x190 [ 31.269072] kmem_cache_free+0x10d/0x4d0 [ 31.269590] rcu_core+0x8c8/0x2860 [ 31.270067] __do_softirq+0x1b7/0x7d4 [ 31.270547] [ 31.270768] Last potentially related work creation: [ 31.271369] kasan_save_stack+0x22/0x50 [ 31.271877] __kasan_record_aux_stack+0x8e/0xa0 [ 31.272454] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.273107] remove_vma+0x139/0x170 [ 31.273568] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.274150] do_vmi_munmap+0x1f1/0x2b0 [ 31.274645] __vm_munmap+0x138/0x3a0 [ 31.275118] __x64_sys_munmap+0x59/0x80 [ 31.275624] do_syscall_64+0x3f/0x90 [ 31.276112] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.276757] [ 31.276973] The buggy address belongs to the object at ffff88800ec11910 [ 31.276973] which belongs to the cache vm_area_struct of size 168 [ 31.278460] The buggy address is located 88 bytes inside of [ 31.278460] freed 168-byte region [ffff88800ec11910, ffff88800ec119b8) [ 31.279896] [ 31.280112] The buggy address belongs to the physical page: [ 31.280771] page:00000000af02d57e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec11 [ 31.281881] memcg:ffff88800ec70401 [ 31.282313] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.283022] page_type: 0xffffffff() [ 31.283483] raw: 0100000000000200 ffff88800879fc80 ffffea0000365280 dead000000000007 [ 31.284420] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec70401 [ 31.285335] page dumped because: kasan: bad access detected [ 31.286018] [ 31.286233] Memory state around the buggy address: [ 31.286822] ffff88800ec11800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.287693] ffff88800ec11880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.288553] >ffff88800ec11900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.289418] ^ [ 31.290219] ffff88800ec11980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.291092] ffff88800ec11a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.291957] ================================================================== [ 31.292983] Disabling lock debugging due to kernel taint [ 33.474512] BUG: Bad rss-counter state mm:00000000cae90cac type:MM_FILEPAGES val:33 [ 33.476244] BUG: Bad rss-counter state mm:00000000cae90cac type:MM_ANONPAGES val:22 [ 34.001949] BUG: Bad rss-counter state mm:0000000010074367 type:MM_FILEPAGES val:33 [ 34.002951] BUG: Bad rss-counter state mm:0000000010074367 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35283' (ECDSA) to the list of known hosts. 2023/06/20 01:13:57 fuzzer started 2023/06/20 01:13:57 dialing manager at localhost:44161 2023/06/20 01:13:57 checking machine... 2023/06/20 01:13:57 checking revisions... [ 34.626845] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:13:57 testing simple program... [ 34.671890] cgroup: Unknown subsys name 'net' [ 34.707782] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:13:56 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff863b1c96 RDX=1ffff1100347ff48 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88801a3ffa98 RSP=ffff88801a3ff9d0 R8 =ffffffff863b1c9a R9 =ffff88801a3ffa80 R10=0000000000038001 R11=000000000008a977 R12=ffff88801a3ffaa0 R13=ffff88801a3ffa88 R14=ffff88801a3fff40 R15=ffff88801a3ffa40 RIP=ffffffff81131271 RFL=00000216 [----AP-] 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 00007fe38a6fe900 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=00007ffddf927000 CR3=00000000180a6000 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=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 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=ffff888008c58400 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=00007f1cbbd1e000 CR3=000000000c552000 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=fce76adfe360b689d2459740a7cf757d XMM02=2c67c8bc2e329bc3000000000011dc00 XMM03=fb795ef6d65770560000000000123ae0 XMM04=cdd5fe4ff7649cb100000000000ae988 XMM05=9c2728d379a83e070000000000134858 XMM06=806171799158d9670000000000133588 XMM07=e042d86d42eb936e0000000000123db8 XMM08=d1860d4261397c9f000000000011dc60 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000