syzkaller login: [ 31.689667] BUG: Bad rss-counter state mm:00000000e896a19d type:MM_FILEPAGES val:33 [ 31.690487] BUG: Bad rss-counter state mm:00000000e896a19d type:MM_ANONPAGES val:22 [ 31.864607] ================================================================== [ 31.865653] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.866902] Read of size 8 at addr ffff88800eef23f8 by task sshd/220 [ 31.867761] [ 31.868013] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.868999] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.870116] Call Trace: [ 31.870497] [ 31.870818] dump_stack_lvl+0x91/0xf0 [ 31.871380] print_report+0xcc/0x620 [ 31.871874] ? __virt_addr_valid+0x102/0x340 [ 31.872432] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.873049] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.873666] kasan_report+0xbe/0xf0 [ 31.874139] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.874768] vma_interval_tree_remove+0xc75/0xec0 [ 31.875372] vma_prepare+0xc54/0x11a0 [ 31.875857] __split_vma+0x5af/0x950 [ 31.876330] ? __pfx___split_vma+0x10/0x10 [ 31.876877] ? find_held_lock+0x2c/0x110 [ 31.877405] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.877976] ? lock_is_held_type+0x9f/0x120 [ 31.878525] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.879136] ? mtree_range_walk+0x632/0x900 [ 31.879692] ? mas_walk+0x5c7/0x7c0 [ 31.880174] do_vmi_munmap+0x1f1/0x2b0 [ 31.880678] mmap_region+0x1f9/0x2660 [ 31.881160] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.881687] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.882428] ? __pfx_lock_acquire+0x10/0x10 [ 31.882959] ? __pfx_mmap_region+0x10/0x10 [ 31.883494] ? security_mmap_addr+0x7d/0xa0 [ 31.884028] ? get_unmapped_area+0x1f5/0x3f0 [ 31.884580] do_mmap+0x854/0xf00 [ 31.885015] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.885506] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.886066] ksys_mmap_pgoff+0x3af/0x500 [ 31.886588] do_syscall_64+0x3f/0x90 [ 31.887065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.887713] RIP: 0033:0x7f4291469d82 [ 31.888176] 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 [ 31.890307] RSP: 002b:00007ffce3dd84f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.891240] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4291469d82 [ 31.892094] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f42908a3000 [ 31.892936] RBP: 00007f42908a3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.893795] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563e919bfb20 [ 31.894653] R13: 00007ffce3dd8510 R14: 00007ffce3dd8540 R15: 00007ffce3dd88a0 [ 31.895514] [ 31.895810] [ 31.896021] Allocated by task 213: [ 31.896447] kasan_save_stack+0x22/0x50 [ 31.896950] kasan_set_track+0x25/0x30 [ 31.897451] __kasan_slab_alloc+0x59/0x70 [ 31.897973] kmem_cache_alloc+0x16b/0x370 [ 31.898506] vm_area_dup+0x20/0x160 [ 31.898960] __split_vma+0x170/0x950 [ 31.899426] split_vma+0xc6/0x110 [ 31.899866] mprotect_fixup+0x8d2/0xb30 [ 31.900364] do_mprotect_pkey+0x87e/0xd40 [ 31.900887] __x64_sys_mprotect+0x78/0xc0 [ 31.901408] do_syscall_64+0x3f/0x90 [ 31.901882] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.902546] [ 31.902762] Freed by task 213: [ 31.903151] kasan_save_stack+0x22/0x50 [ 31.903652] kasan_set_track+0x25/0x30 [ 31.904153] kasan_save_free_info+0x2b/0x50 [ 31.904682] __kasan_slab_free+0x10a/0x190 [ 31.905223] kmem_cache_free+0x10d/0x4d0 [ 31.905738] rcu_core+0x8c8/0x2860 [ 31.906185] __do_softirq+0x1b7/0x7d4 [ 31.906681] [ 31.906895] Last potentially related work creation: [ 31.907524] kasan_save_stack+0x22/0x50 [ 31.908033] __kasan_record_aux_stack+0x8e/0xa0 [ 31.908633] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.909310] remove_vma+0x139/0x170 [ 31.909791] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.910398] do_vmi_munmap+0x1f1/0x2b0 [ 31.910919] __vm_munmap+0x138/0x3a0 [ 31.911395] __x64_sys_munmap+0x59/0x80 [ 31.911893] do_syscall_64+0x3f/0x90 [ 31.912367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.913028] [ 31.913252] Second to last potentially related work creation: [ 31.913935] kasan_save_stack+0x22/0x50 [ 31.914462] __kasan_record_aux_stack+0x8e/0xa0 [ 31.915039] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.915684] remove_vma+0x139/0x170 [ 31.916139] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.916704] do_vmi_munmap+0x1f1/0x2b0 [ 31.917221] mmap_region+0x1f9/0x2660 [ 31.917719] do_mmap+0x854/0xf00 [ 31.918153] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.918652] ksys_mmap_pgoff+0x7d/0x500 [ 31.919160] do_syscall_64+0x3f/0x90 [ 31.919629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.920281] [ 31.920503] The buggy address belongs to the object at ffff88800eef23a0 [ 31.920503] which belongs to the cache vm_area_struct of size 168 [ 31.921987] The buggy address is located 88 bytes inside of [ 31.921987] freed 168-byte region [ffff88800eef23a0, ffff88800eef2448) [ 31.923425] [ 31.923647] The buggy address belongs to the physical page: [ 31.924318] page:00000000c19f32d8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeef2 [ 31.925408] memcg:ffff88800df38d01 [ 31.925836] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.926509] page_type: 0xffffffff() [ 31.926959] raw: 0100000000000200 ffff88800879fc80 ffffea00003c0000 dead000000000008 [ 31.927894] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df38d01 [ 31.928860] page dumped because: kasan: bad access detected [ 31.929551] [ 31.929777] Memory state around the buggy address: [ 31.930398] ffff88800eef2280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.931264] ffff88800eef2300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.932164] >ffff88800eef2380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.933069] ^ [ 31.933937] ffff88800eef2400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.934835] ffff88800eef2480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.935684] ================================================================== [ 31.936685] Disabling lock debugging due to kernel taint [ 34.236704] BUG: Bad rss-counter state mm:00000000ca9fc5d1 type:MM_FILEPAGES val:33 [ 34.237664] BUG: Bad rss-counter state mm:00000000ca9fc5d1 type:MM_ANONPAGES val:22 [ 34.800872] BUG: Bad rss-counter state mm:0000000078c92ead type:MM_FILEPAGES val:33 [ 34.802050] BUG: Bad rss-counter state mm:0000000078c92ead type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4924' (ECDSA) to the list of known hosts. 2023/06/19 17:11:28 fuzzer started 2023/06/19 17:11:28 dialing manager at localhost:44161 2023/06/19 17:11:28 checking machine... 2023/06/19 17:11:28 checking revisions... [ 35.433373] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:11:28 testing simple program... [ 35.480477] cgroup: Unknown subsys name 'net' [ 35.518230] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:11:26 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000001 RCX=ffffffff8186d571 RDX=00000000000086d5 RSI=00000000000086d5 RDI=ffffffff86509714 RBP=ffff888019a97980 RSP=ffff888019a978b8 R8 =0000000000000000 R9 =ffff888019a97968 R10=0000000000038001 R11=00000000000229dc R12=ffff888019a97988 R13=ffff888019a97970 R14=ffff888019a97969 R15=ffff888019a97928 RIP=ffffffff811307c2 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 00007fb9dcd8b900 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=00007fb9dd340650 CR3=000000000c8d6000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff81534376 RDX=0000000000000006 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff81839c37 RSP=ffff88806cf09d88 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88807ffdc000 R13=0000000000000006 R14=00000000fffffeb8 R15=ffff888009471d00 RIP=ffffffff8180fd28 RFL=00000056 [---ZAP-] 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 00007f6f3931b700 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=00007f3c2a64ff80 CR3=0000000016874000 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=2037323a31313a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a31313a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000