syzkaller login: [ 30.597028] BUG: Bad rss-counter state mm:000000008ebbd5f5 type:MM_FILEPAGES val:33 [ 30.598668] BUG: Bad rss-counter state mm:000000008ebbd5f5 type:MM_ANONPAGES val:22 [ 30.764044] ================================================================== [ 30.764938] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.765888] Read of size 8 at addr ffff88800f2b2058 by task sshd/225 [ 30.766661] [ 30.766876] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.767824] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.768791] Call Trace: [ 30.769113] [ 30.769417] dump_stack_lvl+0x91/0xf0 [ 30.769903] print_report+0xcc/0x620 [ 30.770390] ? __virt_addr_valid+0x102/0x340 [ 30.770938] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.771546] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.772157] kasan_report+0xbe/0xf0 [ 30.772640] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.773271] vma_interval_tree_remove+0xc75/0xec0 [ 30.773872] vma_prepare+0xc54/0x11a0 [ 30.774365] __split_vma+0x5af/0x950 [ 30.774853] ? __pfx___split_vma+0x10/0x10 [ 30.775406] ? find_held_lock+0x2c/0x110 [ 30.775946] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.776535] ? lock_is_held_type+0x9f/0x120 [ 30.777097] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.777740] ? mtree_range_walk+0x632/0x900 [ 30.778319] ? mas_walk+0x5c7/0x7c0 [ 30.778812] do_vmi_munmap+0x1f1/0x2b0 [ 30.779329] mmap_region+0x1f9/0x2660 [ 30.779829] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.780355] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.781106] ? __pfx_lock_acquire+0x10/0x10 [ 30.781689] ? __pfx_mmap_region+0x10/0x10 [ 30.782241] ? security_mmap_addr+0x7d/0xa0 [ 30.782792] ? get_unmapped_area+0x1f5/0x3f0 [ 30.783366] do_mmap+0x854/0xf00 [ 30.783822] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.784341] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.784929] ksys_mmap_pgoff+0x3af/0x500 [ 30.785464] do_syscall_64+0x3f/0x90 [ 30.785953] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.786622] RIP: 0033:0x7faec686dd82 [ 30.787095] 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 [ 30.789322] RSP: 002b:00007fff4aa79088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.790265] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faec686dd82 [ 30.791141] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faec5ca7000 [ 30.792013] RBP: 00007faec5ca7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.792891] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559334b04d90 [ 30.793782] R13: 00007fff4aa790a0 R14: 00007fff4aa790d0 R15: 00007fff4aa79430 [ 30.794675] [ 30.794979] [ 30.795198] Allocated by task 218: [ 30.795648] kasan_save_stack+0x22/0x50 [ 30.796170] kasan_set_track+0x25/0x30 [ 30.796684] __kasan_slab_alloc+0x59/0x70 [ 30.797225] kmem_cache_alloc+0x16b/0x370 [ 30.797761] vm_area_dup+0x20/0x160 [ 30.798220] __split_vma+0x170/0x950 [ 30.798712] split_vma+0xc6/0x110 [ 30.799172] mprotect_fixup+0x8d2/0xb30 [ 30.799689] do_mprotect_pkey+0x87e/0xd40 [ 30.800218] __x64_sys_mprotect+0x78/0xc0 [ 30.800768] do_syscall_64+0x3f/0x90 [ 30.801264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.801928] [ 30.802150] Freed by task 204: [ 30.802554] kasan_save_stack+0x22/0x50 [ 30.803078] kasan_set_track+0x25/0x30 [ 30.803594] kasan_save_free_info+0x2b/0x50 [ 30.804151] __kasan_slab_free+0x10a/0x190 [ 30.804702] kmem_cache_free+0x10d/0x4d0 [ 30.805248] rcu_core+0x8c8/0x2860 [ 30.805710] __do_softirq+0x1b7/0x7d4 [ 30.806200] [ 30.806423] Last potentially related work creation: [ 30.807022] kasan_save_stack+0x22/0x50 [ 30.807543] __kasan_record_aux_stack+0x8e/0xa0 [ 30.808151] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.808825] remove_vma+0x139/0x170 [ 30.809301] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.809875] do_vmi_munmap+0x1f1/0x2b0 [ 30.810369] __vm_munmap+0x138/0x3a0 [ 30.810856] __x64_sys_munmap+0x59/0x80 [ 30.811370] do_syscall_64+0x3f/0x90 [ 30.811866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.812525] [ 30.812742] The buggy address belongs to the object at ffff88800f2b2000 [ 30.812742] which belongs to the cache vm_area_struct of size 168 [ 30.814290] The buggy address is located 88 bytes inside of [ 30.814290] freed 168-byte region [ffff88800f2b2000, ffff88800f2b20a8) [ 30.815757] [ 30.815983] The buggy address belongs to the physical page: [ 30.816666] page:00000000b80002ab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2b2 [ 30.817807] memcg:ffff88801a1dce01 [ 30.818249] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.818920] page_type: 0xffffffff() [ 30.819388] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.820349] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a1dce01 [ 30.821296] page dumped because: kasan: bad access detected [ 30.821978] [ 30.822198] Memory state around the buggy address: [ 30.822791] ffff88800f2b1f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 30.823691] ffff88800f2b1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.824587] >ffff88800f2b2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.825489] ^ [ 30.826246] ffff88800f2b2080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.827132] ffff88800f2b2100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.828028] ================================================================== [ 30.829148] Disabling lock debugging due to kernel taint [ 33.679291] BUG: Bad rss-counter state mm:000000005f351d8a type:MM_FILEPAGES val:33 [ 33.680283] BUG: Bad rss-counter state mm:000000005f351d8a type:MM_ANONPAGES val:22 [ 34.231009] BUG: Bad rss-counter state mm:000000005711cd53 type:MM_FILEPAGES val:33 [ 34.232211] BUG: Bad rss-counter state mm:000000005711cd53 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53885' (ECDSA) to the list of known hosts. 2023/06/21 03:37:32 fuzzer started 2023/06/21 03:37:32 dialing manager at localhost:36067 2023/06/21 03:37:32 checking machine... 2023/06/21 03:37:32 checking revisions... [ 34.938653] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:37:32 testing simple program... [ 34.993507] cgroup: Unknown subsys name 'net' [ 35.043424] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:37:32 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652c60 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff86607973 RSP=ffff88806ce09a18 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffffffff86607973 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800d4b4540 RIP=ffffffff84511dc0 RFL=00000286 [--S--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 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=00007fe8fb471120 CR3=000000000ec1e000 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=2032333a37333a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a37333a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888016cef158 RCX=0000000000000001 RDX=1ffff11002d9de2c RSI=ffff888016cefae0 RDI=ffff888016cef160 RBP=ffff888016cefae0 RSP=ffff888016cef0b0 R8 =0000000000000001 R9 =ffff888016cef198 R10=0000000000038001 R11=00000000000b3f70 R12=0000000000000008 R13=ffff888016cef1a0 R14=ffff888016cefae0 R15=ffff888016cef158 RIP=ffffffff81130445 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 00007fc0adc2f900 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=00007fc0adc0e020 CR3=00000000145e4000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000