syzkaller login: [ 35.676038] BUG: Bad rss-counter state mm:00000000914bc3f0 type:MM_FILEPAGES val:33 [ 35.677115] BUG: Bad rss-counter state mm:00000000914bc3f0 type:MM_ANONPAGES val:22 [ 35.836768] ================================================================== [ 35.837666] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.838616] Read of size 8 at addr ffff88800dd65058 by task sshd/219 [ 35.839378] [ 35.839601] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.840626] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.841596] Call Trace: [ 35.841945] [ 35.842229] dump_stack_lvl+0x91/0xf0 [ 35.842740] print_report+0xcc/0x620 [ 35.843237] ? __virt_addr_valid+0x102/0x340 [ 35.843784] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.844396] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.845010] kasan_report+0xbe/0xf0 [ 35.845481] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.846110] vma_interval_tree_remove+0xc75/0xec0 [ 35.846743] vma_prepare+0xc54/0x11a0 [ 35.847240] __split_vma+0x5af/0x950 [ 35.847731] ? __pfx___split_vma+0x10/0x10 [ 35.848263] ? find_held_lock+0x2c/0x110 [ 35.848785] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.849357] ? lock_is_held_type+0x9f/0x120 [ 35.849904] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.850517] ? mtree_range_walk+0x632/0x900 [ 35.851076] ? mas_walk+0x5c7/0x7c0 [ 35.851548] do_vmi_munmap+0x1f1/0x2b0 [ 35.852044] mmap_region+0x1f9/0x2660 [ 35.852525] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.853041] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.853760] ? __pfx_lock_acquire+0x10/0x10 [ 35.854313] ? __pfx_mmap_region+0x10/0x10 [ 35.854844] ? security_mmap_addr+0x7d/0xa0 [ 35.855386] ? get_unmapped_area+0x1f5/0x3f0 [ 35.855933] do_mmap+0x854/0xf00 [ 35.856372] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.856868] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.857433] ksys_mmap_pgoff+0x3af/0x500 [ 35.857952] do_syscall_64+0x3f/0x90 [ 35.858439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.859085] RIP: 0033:0x7f362674bd82 [ 35.859541] 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 [ 35.861673] RSP: 002b:00007ffc57b906c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.862617] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f362674bd82 [ 35.863481] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3625b85000 [ 35.864336] RBP: 00007f3625b85000 R08: 0000000000000009 R09: 0000000000001000 [ 35.865205] R10: 0000000000000812 R11: 0000000000000206 R12: 00005624fdcaed90 [ 35.866108] R13: 00007ffc57b906e0 R14: 00007ffc57b90710 R15: 00007ffc57b90a70 [ 35.866971] [ 35.867262] [ 35.867475] Allocated by task 212: [ 35.867900] kasan_save_stack+0x22/0x50 [ 35.868401] kasan_set_track+0x25/0x30 [ 35.868898] __kasan_slab_alloc+0x59/0x70 [ 35.869426] kmem_cache_alloc+0x16b/0x370 [ 35.869957] vm_area_dup+0x20/0x160 [ 35.870415] __split_vma+0x170/0x950 [ 35.870884] split_vma+0xc6/0x110 [ 35.871333] mprotect_fixup+0x8d2/0xb30 [ 35.871842] do_mprotect_pkey+0x87e/0xd40 [ 35.872368] __x64_sys_mprotect+0x78/0xc0 [ 35.872891] do_syscall_64+0x3f/0x90 [ 35.873372] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.874035] [ 35.874248] Freed by task 212: [ 35.874641] kasan_save_stack+0x22/0x50 [ 35.875145] kasan_set_track+0x25/0x30 [ 35.875634] kasan_save_free_info+0x2b/0x50 [ 35.876165] __kasan_slab_free+0x10a/0x190 [ 35.876692] kmem_cache_free+0x10d/0x4d0 [ 35.877211] rcu_core+0x8c8/0x2860 [ 35.877654] __do_softirq+0x1b7/0x7d4 [ 35.878151] [ 35.878368] Last potentially related work creation: [ 35.878948] kasan_save_stack+0x22/0x50 [ 35.879449] __kasan_record_aux_stack+0x8e/0xa0 [ 35.880029] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.880675] remove_vma+0x139/0x170 [ 35.881134] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.881824] do_vmi_munmap+0x1f1/0x2b0 [ 35.882327] __vm_munmap+0x138/0x3a0 [ 35.882792] __x64_sys_munmap+0x59/0x80 [ 35.883298] do_syscall_64+0x3f/0x90 [ 35.883779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.884420] [ 35.884637] Second to last potentially related work creation: [ 35.885318] kasan_save_stack+0x22/0x50 [ 35.885822] __kasan_record_aux_stack+0x8e/0xa0 [ 35.886405] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.887047] remove_vma+0x139/0x170 [ 35.887496] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.888050] do_vmi_munmap+0x1f1/0x2b0 [ 35.888537] mmap_region+0x1f9/0x2660 [ 35.889016] do_mmap+0x854/0xf00 [ 35.889446] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.889933] ksys_mmap_pgoff+0x3af/0x500 [ 35.890432] do_syscall_64+0x3f/0x90 [ 35.890909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.891550] [ 35.891769] The buggy address belongs to the object at ffff88800dd65000 [ 35.891769] which belongs to the cache vm_area_struct of size 168 [ 35.893244] The buggy address is located 88 bytes inside of [ 35.893244] freed 168-byte region [ffff88800dd65000, ffff88800dd650a8) [ 35.894665] [ 35.894888] The buggy address belongs to the physical page: [ 35.895566] page:000000002787a5d0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd65 [ 35.896673] memcg:ffff88800dd8a301 [ 35.897100] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.897822] page_type: 0xffffffff() [ 35.898290] raw: 0100000000000200 ffff8880087a0c80 ffffea0000374f40 dead00000000000d [ 35.899215] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd8a301 [ 35.900127] page dumped because: kasan: bad access detected [ 35.900798] [ 35.901020] Memory state around the buggy address: [ 35.901602] ffff88800dd64f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.902481] ffff88800dd64f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.903337] >ffff88800dd65000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.904206] ^ [ 35.904939] ffff88800dd65080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 35.905802] ffff88800dd65100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.906667] ================================================================== [ 35.907599] Disabling lock debugging due to kernel taint [ 38.394562] BUG: Bad rss-counter state mm:00000000c00fdf61 type:MM_FILEPAGES val:33 [ 38.395547] BUG: Bad rss-counter state mm:00000000c00fdf61 type:MM_ANONPAGES val:22 [ 38.771338] BUG: Bad rss-counter state mm:00000000824b3e92 type:MM_FILEPAGES val:33 [ 38.772433] BUG: Bad rss-counter state mm:00000000824b3e92 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63447' (ECDSA) to the list of known hosts. 2023/06/20 15:38:56 fuzzer started 2023/06/20 15:38:56 dialing manager at localhost:36067 2023/06/20 15:38:56 checking machine... 2023/06/20 15:38:56 checking revisions... [ 39.429550] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:38:56 testing simple program... [ 39.467257] cgroup: Unknown subsys name 'net' [ 39.505641] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:38:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff810001ce RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff85407f40 RDI=ffffffff810001ce RBP=ffffffff810001ce RSP=ffff88806ce09a48 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=ffffffff85d3d357 R11=00000000000b54e7 R12=0000000000000001 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff8880139f77a0 RIP=ffffffff811fc772 RFL=00000283 [--S---C] 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=00007fc8a57e9210 CR3=0000000019e66000 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=2036353a38333a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a38333a3531203032 XMM08=20303d64696720303d64697520612f6e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=1ffff11002cdde85 RCX=ffffffff812d8f13 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff8880166ef408 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000b9400000b94 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180f135 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 00007f0e2aed3900 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=00007fffddd6d000 CR3=000000000e47c000 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=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