syzkaller login: [ 31.644635] BUG: Bad rss-counter state mm:00000000f2142fbd type:MM_FILEPAGES val:33 [ 31.646212] BUG: Bad rss-counter state mm:00000000f2142fbd type:MM_ANONPAGES val:22 [ 31.812296] ================================================================== [ 31.813273] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.814332] Read of size 8 at addr ffff88800f81db38 by task sshd/220 [ 31.815107] [ 31.815332] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.816226] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.817229] Call Trace: [ 31.817564] [ 31.817862] dump_stack_lvl+0x91/0xf0 [ 31.818357] print_report+0xcc/0x620 [ 31.818845] ? __virt_addr_valid+0x102/0x340 [ 31.819419] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.820071] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.820700] kasan_report+0xbe/0xf0 [ 31.821182] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.821808] vma_interval_tree_remove+0xc75/0xec0 [ 31.822414] vma_prepare+0xc54/0x11a0 [ 31.822895] __split_vma+0x5af/0x950 [ 31.823368] ? __pfx___split_vma+0x10/0x10 [ 31.823916] ? find_held_lock+0x2c/0x110 [ 31.824439] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.825023] ? lock_is_held_type+0x9f/0x120 [ 31.825572] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.826187] ? mtree_range_walk+0x632/0x900 [ 31.826741] ? mas_walk+0x5c7/0x7c0 [ 31.827220] do_vmi_munmap+0x1f1/0x2b0 [ 31.827717] mmap_region+0x1f9/0x2660 [ 31.828207] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.828717] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.829432] ? __pfx_lock_acquire+0x10/0x10 [ 31.829977] ? __pfx_mmap_region+0x10/0x10 [ 31.830511] ? security_mmap_addr+0x7d/0xa0 [ 31.831041] ? get_unmapped_area+0x1f5/0x3f0 [ 31.831607] do_mmap+0x854/0xf00 [ 31.832059] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.832559] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.833132] ksys_mmap_pgoff+0x3af/0x500 [ 31.833645] do_syscall_64+0x3f/0x90 [ 31.834130] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.834783] RIP: 0033:0x7f3786dc7d82 [ 31.835254] 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 [ 31.837408] RSP: 002b:00007ffcc0693528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.838336] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3786dc7d82 [ 31.839182] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3786201000 [ 31.840043] RBP: 00007f3786201000 R08: 0000000000000009 R09: 0000000000001000 [ 31.840897] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555f177b5d90 [ 31.841770] R13: 00007ffcc0693540 R14: 00007ffcc0693570 R15: 00007ffcc06938d0 [ 31.842646] [ 31.842942] [ 31.843158] Allocated by task 213: [ 31.843603] kasan_save_stack+0x22/0x50 [ 31.844120] kasan_set_track+0x25/0x30 [ 31.844621] __kasan_slab_alloc+0x59/0x70 [ 31.845148] kmem_cache_alloc+0x16b/0x370 [ 31.845664] vm_area_dup+0x20/0x160 [ 31.846130] __split_vma+0x170/0x950 [ 31.846601] split_vma+0xc6/0x110 [ 31.847053] mprotect_fixup+0x8d2/0xb30 [ 31.847553] do_mprotect_pkey+0x87e/0xd40 [ 31.848091] __x64_sys_mprotect+0x78/0xc0 [ 31.848618] do_syscall_64+0x3f/0x90 [ 31.849093] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.849739] [ 31.849954] Freed by task 213: [ 31.850355] kasan_save_stack+0x22/0x50 [ 31.850860] kasan_set_track+0x25/0x30 [ 31.851355] kasan_save_free_info+0x2b/0x50 [ 31.851911] __kasan_slab_free+0x10a/0x190 [ 31.852448] kmem_cache_free+0x10d/0x4d0 [ 31.852958] rcu_core+0x8c8/0x2860 [ 31.853405] __do_softirq+0x1b7/0x7d4 [ 31.853883] [ 31.854099] Last potentially related work creation: [ 31.854696] kasan_save_stack+0x22/0x50 [ 31.855208] __kasan_record_aux_stack+0x8e/0xa0 [ 31.855796] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.856445] remove_vma+0x139/0x170 [ 31.856907] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.857464] do_vmi_munmap+0x1f1/0x2b0 [ 31.857951] __vm_munmap+0x138/0x3a0 [ 31.858416] __x64_sys_munmap+0x59/0x80 [ 31.858924] do_syscall_64+0x3f/0x90 [ 31.859408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.860060] [ 31.860278] Second to last potentially related work creation: [ 31.860957] kasan_save_stack+0x22/0x50 [ 31.861459] __kasan_record_aux_stack+0x8e/0xa0 [ 31.862032] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.862676] remove_vma+0x139/0x170 [ 31.863128] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.863702] do_vmi_munmap+0x1f1/0x2b0 [ 31.864191] mmap_region+0x1f9/0x2660 [ 31.864671] do_mmap+0x854/0xf00 [ 31.865102] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.865595] ksys_mmap_pgoff+0x3af/0x500 [ 31.866096] do_syscall_64+0x3f/0x90 [ 31.866570] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.867213] [ 31.867430] The buggy address belongs to the object at ffff88800f81dae0 [ 31.867430] which belongs to the cache vm_area_struct of size 168 [ 31.868924] The buggy address is located 88 bytes inside of [ 31.868924] freed 168-byte region [ffff88800f81dae0, ffff88800f81db88) [ 31.870346] [ 31.870565] The buggy address belongs to the physical page: [ 31.871230] page:0000000085fcc7ff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf81d [ 31.872346] memcg:ffff88800dbc5201 [ 31.872773] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.873479] page_type: 0xffffffff() [ 31.873936] raw: 0100000000000200 ffff88800879fc80 ffffea000036d280 0000000000000007 [ 31.874858] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbc5201 [ 31.875783] page dumped because: kasan: bad access detected [ 31.876448] [ 31.876663] Memory state around the buggy address: [ 31.877241] ffff88800f81da00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.878102] ffff88800f81da80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.878965] >ffff88800f81db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.879833] ^ [ 31.880441] ffff88800f81db80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 31.881296] ffff88800f81dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.882151] ================================================================== [ 31.883133] Disabling lock debugging due to kernel taint [ 33.741729] BUG: Bad rss-counter state mm:0000000027627918 type:MM_FILEPAGES val:33 [ 33.743268] BUG: Bad rss-counter state mm:0000000027627918 type:MM_ANONPAGES val:22 [ 34.253187] BUG: Bad rss-counter state mm:000000003d0c91ad type:MM_FILEPAGES val:33 [ 34.254431] BUG: Bad rss-counter state mm:000000003d0c91ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21635' (ECDSA) to the list of known hosts. 2023/06/20 05:03:45 fuzzer started 2023/06/20 05:03:45 dialing manager at localhost:44161 2023/06/20 05:03:45 checking machine... 2023/06/20 05:03:45 checking revisions... [ 35.029600] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:03:45 testing simple program... [ 35.092388] cgroup: Unknown subsys name 'net' [ 35.139887] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:03:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888015a7f520 RCX=0000000000000001 RDX=1ffff11002b4feaf RSI=ffff888015a7f878 RDI=ffffffff81370a3a RBP=ffff888015a7f578 RSP=ffff888015a7f508 R8 =0000000000000001 R9 =ffff888015a7f560 R10=0000000000038001 R11=0000000000020ed0 R12=ffff888015a7f5e8 R13=0000000000000000 R14=ffff888015b21b40 R15=ffff88800db7a880 RIP=ffffffff811303b2 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 00007f8ada6a9700 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=00007f9295b920b0 CR3=0000000019c26000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732034343a3330 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383433 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888018cf5490 RCX=ffffea0000000000 RDX=ffffea0000633d01 RSI=ffffffff813782a8 RDI=ffff8880087b6500 RBP=ffff88806cf09e58 RSP=ffff88806cf09e30 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff8880087b6500 R13=ffffea0000633d00 R14=ffffffff813782a8 R15=ffff888018cf55b8 RIP=ffffffff818098f0 RFL=00000202 [-------] 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 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=00007ff296dd8540 CR3=0000000013b24000 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=e6500a923980f093f94ba437f6e7b5b6 XMM02=000000000011e560ec2efd57dc4c00df XMM03=0000000000125340117b60155f7373ca XMM04=5648a9851ce1d60600000000000ae988 XMM05=19e9129bd510f2350000000000136230 XMM06=57c01cd57f1218170000000000135098 XMM07=e042d86d42eb936e00000000001255c0 XMM08=117b60155f7373ca000000000011e5c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000