syzkaller login: [ 30.740973] BUG: Bad rss-counter state mm:000000005340fa20 type:MM_FILEPAGES val:33 [ 30.742192] BUG: Bad rss-counter state mm:000000005340fa20 type:MM_ANONPAGES val:22 [ 30.774999] ================================================================== [ 30.776135] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.777148] Read of size 8 at addr ffff88800e8dfa50 by task sshd/220 [ 30.777924] [ 30.778145] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.779025] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.780038] Call Trace: [ 30.780368] [ 30.780666] dump_stack_lvl+0x91/0xf0 [ 30.781189] print_report+0xcc/0x620 [ 30.781697] ? __virt_addr_valid+0x102/0x340 [ 30.782267] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.782911] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.783554] kasan_report+0xbe/0xf0 [ 30.784036] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.784675] vma_interval_tree_remove+0xc75/0xec0 [ 30.785293] vma_prepare+0xc54/0x11a0 [ 30.785787] __split_vma+0x5af/0x950 [ 30.786270] ? __pfx___split_vma+0x10/0x10 [ 30.787000] ? find_held_lock+0x2c/0x110 [ 30.787544] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.788126] ? lock_is_held_type+0x9f/0x120 [ 30.788683] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.789305] ? mtree_range_walk+0x632/0x900 [ 30.789880] ? mas_walk+0x5c7/0x7c0 [ 30.790368] do_vmi_munmap+0x1f1/0x2b0 [ 30.790876] mmap_region+0x1f9/0x2660 [ 30.791370] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.791920] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.792642] ? __pfx_lock_acquire+0x10/0x10 [ 30.793193] ? __pfx_mmap_region+0x10/0x10 [ 30.793743] ? security_mmap_addr+0x7d/0xa0 [ 30.794289] ? get_unmapped_area+0x1f5/0x3f0 [ 30.794845] do_mmap+0x854/0xf00 [ 30.795294] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.795813] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.796385] ksys_mmap_pgoff+0x3af/0x500 [ 30.796909] do_syscall_64+0x3f/0x90 [ 30.797400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.798065] RIP: 0033:0x7f976991bd82 [ 30.798528] 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 [ 30.800709] RSP: 002b:00007ffe6d6d5b78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.801637] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f976991bd82 [ 30.802503] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9768d55000 [ 30.803369] RBP: 00007f9768d55000 R08: 0000000000000009 R09: 0000000000001000 [ 30.804247] R10: 0000000000000812 R11: 0000000000000206 R12: 000056131346dec0 [ 30.805105] R13: 00007ffe6d6d5b90 R14: 00007ffe6d6d5bc0 R15: 00007ffe6d6d5f20 [ 30.805980] [ 30.806283] [ 30.806509] Allocated by task 213: [ 30.806950] kasan_save_stack+0x22/0x50 [ 30.807469] kasan_set_track+0x25/0x30 [ 30.808005] __kasan_slab_alloc+0x59/0x70 [ 30.808552] kmem_cache_alloc+0x16b/0x370 [ 30.809086] vm_area_dup+0x20/0x160 [ 30.809548] __split_vma+0x170/0x950 [ 30.810030] split_vma+0xc6/0x110 [ 30.810493] mprotect_fixup+0x8d2/0xb30 [ 30.811009] do_mprotect_pkey+0x87e/0xd40 [ 30.811556] __x64_sys_mprotect+0x78/0xc0 [ 30.812104] do_syscall_64+0x3f/0x90 [ 30.812595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.813254] [ 30.813478] Freed by task 213: [ 30.813879] kasan_save_stack+0x22/0x50 [ 30.814400] kasan_set_track+0x25/0x30 [ 30.814909] kasan_save_free_info+0x2b/0x50 [ 30.815460] __kasan_slab_free+0x10a/0x190 [ 30.816021] kmem_cache_free+0x10d/0x4d0 [ 30.816550] rcu_core+0x8c8/0x2860 [ 30.817006] __do_softirq+0x1b7/0x7d4 [ 30.817497] [ 30.817716] Last potentially related work creation: [ 30.818310] kasan_save_stack+0x22/0x50 [ 30.818834] __kasan_record_aux_stack+0x8e/0xa0 [ 30.819431] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.820111] remove_vma+0x139/0x170 [ 30.820575] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.821147] do_vmi_munmap+0x1f1/0x2b0 [ 30.821643] __vm_munmap+0x138/0x3a0 [ 30.822126] __x64_sys_munmap+0x59/0x80 [ 30.822638] do_syscall_64+0x3f/0x90 [ 30.823125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.823792] [ 30.824015] The buggy address belongs to the object at ffff88800e8df9f8 [ 30.824015] which belongs to the cache vm_area_struct of size 168 [ 30.825528] The buggy address is located 88 bytes inside of [ 30.825528] freed 168-byte region [ffff88800e8df9f8, ffff88800e8dfaa0) [ 30.826985] [ 30.827203] The buggy address belongs to the physical page: [ 30.827893] page:000000007f520311 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe8df [ 30.829016] memcg:ffff88800d35b101 [ 30.829452] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.830123] page_type: 0xffffffff() [ 30.830590] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.831563] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d35b101 [ 30.832495] page dumped because: kasan: bad access detected [ 30.833176] [ 30.833400] Memory state around the buggy address: [ 30.833999] ffff88800e8df900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.834869] ffff88800e8df980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.835760] >ffff88800e8dfa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.836645] ^ [ 30.837367] ffff88800e8dfa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.838245] ffff88800e8dfb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.839129] ================================================================== [ 30.840300] Disabling lock debugging due to kernel taint [ 32.912898] BUG: Bad rss-counter state mm:00000000b5484a02 type:MM_FILEPAGES val:33 [ 32.913714] BUG: Bad rss-counter state mm:00000000b5484a02 type:MM_ANONPAGES val:22 [ 33.298292] BUG: Bad rss-counter state mm:00000000b786319c type:MM_FILEPAGES val:33 [ 33.298989] BUG: Bad rss-counter state mm:00000000b786319c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12777' (ECDSA) to the list of known hosts. 2023/06/20 10:55:43 fuzzer started 2023/06/20 10:55:44 dialing manager at localhost:36067 2023/06/20 10:55:44 checking machine... 2023/06/20 10:55:44 checking revisions... [ 34.001398] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:55:44 testing simple program... [ 34.040072] cgroup: Unknown subsys name 'net' [ 34.093182] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:55:43 Registers: info registers vcpu 0 RAX=0000000000002007 RBX=00005633aba43eb0 RCX=0000000000000010 RDX=0000000000000000 RSI=0000000000000023 RDI=00005633aba43ea0 RBP=0000000000000002 RSP=00007fff464f77c8 R8 =00005633aba70be3 R9 =00007f31ad3bcbe0 R10=0000000000000100 R11=0000000000000246 R12=00005633aba61ed0 R13=00007fff464f77d8 R14=00007f31acde5b22 R15=00007f31ace0a710 RIP=00007f31ad35d541 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 00007f31ace0a900 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=00007fff464f1000 CR3=000000000e954000 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=23232323232323232323232323232323 XMM01=ffffffffffffff00ffff000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=350909534549525445525f4e49474f4c XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=000000ffffffffffffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fcee1647dd0 CR3=000000000db8a000 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=86d6a61d1f078d995648fda0ad358b15 XMM02=ec2efd57dc4c00df000000000011ebb0 XMM03=58d4c3b6bd864148000000000011ec80 XMM04=d72c9d55debc134a00000000000ae988 XMM05=19e9129bd510f2350000000000133ed8 XMM06=225a1839abebbf140000000000132d40 XMM07=e042d86d42eb936e0000000000124a48 XMM08=58d4c3b6bd864148000000000011ec80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000