syzkaller login: [ 28.697770] BUG: Bad rss-counter state mm:000000006fa04b81 type:MM_FILEPAGES val:33 [ 28.698953] BUG: Bad rss-counter state mm:000000006fa04b81 type:MM_ANONPAGES val:22 [ 28.891539] ================================================================== [ 28.892463] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.893415] Read of size 8 at addr ffff88800d4a33f8 by task sshd/221 [ 28.894308] [ 28.894525] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.895392] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.896383] Call Trace: [ 28.896701] [ 28.896986] dump_stack_lvl+0x91/0xf0 [ 28.897483] print_report+0xcc/0x620 [ 28.897968] ? __virt_addr_valid+0x102/0x340 [ 28.898523] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.899164] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.899778] kasan_report+0xbe/0xf0 [ 28.900257] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.900878] vma_interval_tree_remove+0xc75/0xec0 [ 28.901478] vma_prepare+0xc54/0x11a0 [ 28.901956] __split_vma+0x5af/0x950 [ 28.902431] ? __pfx___split_vma+0x10/0x10 [ 28.902970] ? find_held_lock+0x2c/0x110 [ 28.903498] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.904064] ? lock_is_held_type+0x9f/0x120 [ 28.904606] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.905218] ? mtree_range_walk+0x632/0x900 [ 28.905775] ? mas_walk+0x5c7/0x7c0 [ 28.906254] do_vmi_munmap+0x1f1/0x2b0 [ 28.906755] mmap_region+0x1f9/0x2660 [ 28.907247] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.907755] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.908480] ? __pfx_lock_acquire+0x10/0x10 [ 28.909022] ? __pfx_mmap_region+0x10/0x10 [ 28.909563] ? security_mmap_addr+0x7d/0xa0 [ 28.910087] ? get_unmapped_area+0x1f5/0x3f0 [ 28.910648] do_mmap+0x854/0xf00 [ 28.911100] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.911606] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.912183] ksys_mmap_pgoff+0x3af/0x500 [ 28.912697] do_syscall_64+0x3f/0x90 [ 28.913180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.913829] RIP: 0033:0x7f5726a6bd82 [ 28.914287] 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 [ 28.916418] RSP: 002b:00007ffd4d3b1188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.917323] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5726a6bd82 [ 28.918166] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5725ea5000 [ 28.919037] RBP: 00007f5725ea5000 R08: 0000000000000009 R09: 0000000000001000 [ 28.919888] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562bd9aa5d90 [ 28.920729] R13: 00007ffd4d3b11a0 R14: 00007ffd4d3b11d0 R15: 00007ffd4d3b1530 [ 28.921593] [ 28.921884] [ 28.922100] Allocated by task 212: [ 28.922532] kasan_save_stack+0x22/0x50 [ 28.923046] kasan_set_track+0x25/0x30 [ 28.923546] __kasan_slab_alloc+0x59/0x70 [ 28.924067] kmem_cache_alloc+0x16b/0x370 [ 28.924582] vm_area_dup+0x20/0x160 [ 28.925042] __split_vma+0x170/0x950 [ 28.925515] split_vma+0xc6/0x110 [ 28.925956] mprotect_fixup+0x8d2/0xb30 [ 28.926458] do_mprotect_pkey+0x87e/0xd40 [ 28.926986] __x64_sys_mprotect+0x78/0xc0 [ 28.927510] do_syscall_64+0x3f/0x90 [ 28.927986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.928628] [ 28.928845] Freed by task 212: [ 28.929247] kasan_save_stack+0x22/0x50 [ 28.929747] kasan_set_track+0x25/0x30 [ 28.930244] kasan_save_free_info+0x2b/0x50 [ 28.930779] __kasan_slab_free+0x10a/0x190 [ 28.931333] kmem_cache_free+0x10d/0x4d0 [ 28.931837] rcu_core+0x8c8/0x2860 [ 28.932278] __do_softirq+0x1b7/0x7d4 [ 28.932757] [ 28.932973] Last potentially related work creation: [ 28.933564] kasan_save_stack+0x22/0x50 [ 28.934068] __kasan_record_aux_stack+0x8e/0xa0 [ 28.934645] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.935293] remove_vma+0x139/0x170 [ 28.935745] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.936312] do_vmi_munmap+0x1f1/0x2b0 [ 28.936799] __vm_munmap+0x138/0x3a0 [ 28.937268] __x64_sys_munmap+0x59/0x80 [ 28.937764] do_syscall_64+0x3f/0x90 [ 28.938249] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.938911] [ 28.939127] Second to last potentially related work creation: [ 28.939805] kasan_save_stack+0x22/0x50 [ 28.940309] __kasan_record_aux_stack+0x8e/0xa0 [ 28.940889] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.941528] remove_vma+0x139/0x170 [ 28.941981] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.942543] do_vmi_munmap+0x1f1/0x2b0 [ 28.943042] mmap_region+0x1f9/0x2660 [ 28.943520] do_mmap+0x854/0xf00 [ 28.943954] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.944441] ksys_mmap_pgoff+0x3af/0x500 [ 28.944942] do_syscall_64+0x3f/0x90 [ 28.945415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.946062] [ 28.946278] The buggy address belongs to the object at ffff88800d4a33a0 [ 28.946278] which belongs to the cache vm_area_struct of size 168 [ 28.947756] The buggy address is located 88 bytes inside of [ 28.947756] freed 168-byte region [ffff88800d4a33a0, ffff88800d4a3448) [ 28.949158] [ 28.949373] The buggy address belongs to the physical page: [ 28.950030] page:000000007177c5ca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd4a3 [ 28.951159] memcg:ffff8880093a5601 [ 28.951590] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.952282] page_type: 0xffffffff() [ 28.952738] raw: 0100000000000200 ffff8880087a0c80 ffffea00002624c0 dead000000000007 [ 28.953655] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880093a5601 [ 28.954591] page dumped because: kasan: bad access detected [ 28.955265] [ 28.955480] Memory state around the buggy address: [ 28.956058] ffff88800d4a3280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 28.956911] ffff88800d4a3300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 28.957772] >ffff88800d4a3380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 28.958613] ^ [ 28.959470] ffff88800d4a3400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 28.960332] ffff88800d4a3480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.961177] ================================================================== [ 28.962332] Disabling lock debugging due to kernel taint [ 30.937546] BUG: Bad rss-counter state mm:000000000ee88621 type:MM_FILEPAGES val:33 [ 30.938933] BUG: Bad rss-counter state mm:000000000ee88621 type:MM_ANONPAGES val:22 [ 31.414569] BUG: Bad rss-counter state mm:0000000025b13ac7 type:MM_FILEPAGES val:33 [ 31.415575] BUG: Bad rss-counter state mm:0000000025b13ac7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8584' (ECDSA) to the list of known hosts. 2023/06/20 20:50:45 fuzzer started 2023/06/20 20:50:45 dialing manager at localhost:36067 2023/06/20 20:50:45 checking machine... 2023/06/20 20:50:45 checking revisions... [ 32.152474] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:50:45 testing simple program... [ 32.201672] cgroup: Unknown subsys name 'net' [ 32.253089] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:50:45 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff815343f6 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84535d53 RSP=ffff88800efef6f8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000287 R13=ffffea000051fa00 R14=ffffffff83675648 R15=ffff888015c0b600 RIP=ffffffff81534400 RFL=00000047 [---Z-PC] 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 00007fb7d5cf1900 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=00007fb7d62a8618 CR3=0000000019748000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=000000000000c4d7 RCX=ffffffff81788ad5 RDX=1ffffd40000626b8 RSI=0000000000000004 RDI=ffffea00003135f8 RBP=0000000000000000 RSP=ffff8880103cf6d0 R8 =0000000000000000 R9 =fffff940000626be R10=ffffea00003135f7 R11=00000000000b6d53 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=ffffea00003135c0 RIP=ffffffff81788b3f 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd36e0b6900 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=00007fd36d523430 CR3=000000000c636000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f1ee36e649f6991800000000000ae988 XMM05=576477a289fbd99d0000000000134e40 XMM06=19e9129bd510f2350000000000133cd8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000