syzkaller login: [ 40.636553] BUG: Bad rss-counter state mm:00000000b7941bb0 type:MM_FILEPAGES val:33 [ 40.637255] BUG: Bad rss-counter state mm:00000000b7941bb0 type:MM_ANONPAGES val:22 [ 40.802230] ================================================================== [ 40.802806] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.803388] Read of size 8 at addr ffff888018fdf6b0 by task sshd/219 [ 40.803876] [ 40.804023] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.804633] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.805280] Call Trace: [ 40.805493] <TASK> [ 40.805682] dump_stack_lvl+0x91/0xf0 [ 40.806016] print_report+0xcc/0x620 [ 40.806345] ? __virt_addr_valid+0x102/0x340 [ 40.806712] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.807120] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.807540] kasan_report+0xbe/0xf0 [ 40.807864] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.808280] vma_interval_tree_remove+0xc75/0xec0 [ 40.812695] vma_prepare+0xc54/0x11a0 [ 40.813017] __split_vma+0x5af/0x950 [ 40.813334] ? __pfx___split_vma+0x10/0x10 [ 40.813681] ? find_held_lock+0x2c/0x110 [ 40.814012] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.814385] ? lock_is_held_type+0x9f/0x120 [ 40.814744] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.815145] ? mtree_range_walk+0x632/0x900 [ 40.815514] ? mas_walk+0x5c7/0x7c0 [ 40.815832] do_vmi_munmap+0x1f1/0x2b0 [ 40.816160] mmap_region+0x1f9/0x2660 [ 40.820510] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.820846] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.821333] ? __pfx_lock_acquire+0x10/0x10 [ 40.821682] ? __pfx_mmap_region+0x10/0x10 [ 40.822029] ? security_mmap_addr+0x7d/0xa0 [ 40.822428] ? get_unmapped_area+0x1f5/0x3f0 [ 40.822790] do_mmap+0x854/0xf00 [ 40.823088] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.823417] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.823778] ksys_mmap_pgoff+0x3af/0x500 [ 40.824102] do_syscall_64+0x3f/0x90 [ 40.824484] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.824904] RIP: 0033:0x7faa004b4d82 [ 40.825198] 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 [ 40.826568] RSP: 002b:00007ffffd436fc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.827156] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faa004b4d82 [ 40.827703] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa9ff8ee000 [ 40.828326] RBP: 00007fa9ff8ee000 R08: 0000000000000009 R09: 0000000000001000 [ 40.828956] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555851e33d90 [ 40.829651] R13: 00007ffffd436fe0 R14: 00007ffffd437010 R15: 00007ffffd437370 [ 40.830304] </TASK> [ 40.830533] [ 40.830685] Allocated by task 212: [ 40.831001] kasan_save_stack+0x22/0x50 [ 40.831407] kasan_set_track+0x25/0x30 [ 40.831771] __kasan_slab_alloc+0x59/0x70 [ 40.832716] kmem_cache_alloc+0x16b/0x370 [ 40.833596] vm_area_dup+0x20/0x160 [ 40.834430] __split_vma+0x170/0x950 [ 40.835347] split_vma+0xc6/0x110 [ 40.836198] mprotect_fixup+0x8d2/0xb30 [ 40.837228] do_mprotect_pkey+0x87e/0xd40 [ 40.838285] __x64_sys_mprotect+0x78/0xc0 [ 40.839325] do_syscall_64+0x3f/0x90 [ 40.840245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.841483] [ 40.841826] Freed by task 13: [ 40.842551] kasan_save_stack+0x22/0x50 [ 40.843484] kasan_set_track+0x25/0x30 [ 40.844398] kasan_save_free_info+0x2b/0x50 [ 40.845406] __kasan_slab_free+0x10a/0x190 [ 40.846380] kmem_cache_free+0x10d/0x4d0 [ 40.847304] rcu_core+0x8c8/0x2860 [ 40.848101] __do_softirq+0x1b7/0x7d4 [ 40.849002] [ 40.849396] Last potentially related work creation: [ 40.850498] kasan_save_stack+0x22/0x50 [ 40.851430] __kasan_record_aux_stack+0x8e/0xa0 [ 40.852559] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.853758] remove_vma+0x139/0x170 [ 40.854593] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.855640] do_vmi_munmap+0x1f1/0x2b0 [ 40.856576] __vm_munmap+0x138/0x3a0 [ 40.857404] __x64_sys_munmap+0x59/0x80 [ 40.858293] do_syscall_64+0x3f/0x90 [ 40.859113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.860249] [ 40.860618] The buggy address belongs to the object at ffff888018fdf658 [ 40.860618] which belongs to the cache vm_area_struct of size 168 [ 40.863516] The buggy address is located 88 bytes inside of [ 40.863516] freed 168-byte region [ffff888018fdf658, ffff888018fdf700) [ 40.870205] [ 40.870598] The buggy address belongs to the physical page: [ 40.871944] page:00000000ee1ec322 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18fdf [ 40.874223] memcg:ffff88800ecdf801 [ 40.875068] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.876379] page_type: 0xffffffff() [ 40.877224] raw: 0100000000000200 ffff88800879fc80 ffffea0000672c80 0000000000000008 [ 40.879077] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ecdf801 [ 40.880800] page dumped because: kasan: bad access detected [ 40.881955] [ 40.882339] Memory state around the buggy address: [ 40.883436] ffff888018fdf580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.885060] ffff888018fdf600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 40.886802] >ffff888018fdf680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.888540] ^ [ 40.889761] ffff888018fdf700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 40.891568] ffff888018fdf780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 40.893236] ================================================================== [ 40.895409] Disabling lock debugging due to kernel taint [ 43.981316] BUG: Bad rss-counter state mm:000000000ec00592 type:MM_FILEPAGES val:33 [ 43.982090] BUG: Bad rss-counter state mm:000000000ec00592 type:MM_ANONPAGES val:22 [ 45.359474] BUG: Bad rss-counter state mm:000000007366aece type:MM_FILEPAGES val:33 [ 45.360098] BUG: Bad rss-counter state mm:000000007366aece type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14269' (ECDSA) to the list of known hosts. 2023/06/20 10:21:53 fuzzer started 2023/06/20 10:21:54 dialing manager at localhost:44161 2023/06/20 10:21:54 checking machine... 2023/06/20 10:21:54 checking revisions... 2023/06/20 10:21:54 testing simple program... [ 46.372497] kmemleak: Automatic memory scanning thread ended [ 46.416292] cgroup: Unknown subsys name 'net' [ 46.492768] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:21:51 Registers: info registers vcpu 0 RAX=0000000000000030 RBX=00000000000003f8 RCX=0000000000000000 RDX=00000000000003f8 RSI=ffffffff82505fe5 RDI=ffffffff87f6c0a0 RBP=ffffffff87f6c060 RSP=ffff88801a04f980 R8 =0000000000000001 R9 =000000000000000a R10=0000000000000030 R11=000000003a475542 R12=0000000000000030 R13=ffffffff87f6c060 R14=0000000000000010 R15=ffffffff82505fd0 RIP=ffffffff8250603d RFL=00000002 [-------] 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 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=00007ff3d37562b0 CR3=0000000009790000 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=aadae82b17a2798e284b0ba4feb72522 XMM02=ec2efd57dc4c00df0000000000120b48 XMM03=3df51833aff424950000000000120c18 XMM04=e61b0fe2cb7103ed00000000000ae988 XMM05=fd3683841374d66000000000001358b0 XMM06=e4cb8bb95a7664b60000000000134c18 XMM07=139997807ff5a44200000000001261a8 XMM08=e1353cc91df538a700000000001257b8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ff01f2c16f8 CR3=000000000f036000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000