syzkaller login: [ 31.093089] BUG: Bad rss-counter state mm:000000005de4f0e4 type:MM_FILEPAGES val:33 [ 31.094308] BUG: Bad rss-counter state mm:000000005de4f0e4 type:MM_ANONPAGES val:22 [ 31.242501] ================================================================== [ 31.243430] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.244383] Read of size 8 at addr ffff888016c75c20 by task sshd/220 [ 31.245237] [ 31.245459] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.246322] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.247312] Call Trace: [ 31.247634] [ 31.247918] dump_stack_lvl+0x91/0xf0 [ 31.248407] print_report+0xcc/0x620 [ 31.248895] ? __virt_addr_valid+0x102/0x340 [ 31.249450] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.250088] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.250704] kasan_report+0xbe/0xf0 [ 31.251174] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.251802] vma_interval_tree_remove+0xc75/0xec0 [ 31.252409] vma_prepare+0xc54/0x11a0 [ 31.252888] __split_vma+0x5af/0x950 [ 31.253361] ? __pfx___split_vma+0x10/0x10 [ 31.253901] ? find_held_lock+0x2c/0x110 [ 31.254425] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.254986] ? lock_is_held_type+0x9f/0x120 [ 31.255519] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.256122] ? mtree_range_walk+0x632/0x900 [ 31.256678] ? mas_walk+0x5c7/0x7c0 [ 31.257150] do_vmi_munmap+0x1f1/0x2b0 [ 31.257640] mmap_region+0x1f9/0x2660 [ 31.258133] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.258642] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.259353] ? __pfx_lock_acquire+0x10/0x10 [ 31.259883] ? __pfx_mmap_region+0x10/0x10 [ 31.260412] ? security_mmap_addr+0x7d/0xa0 [ 31.260941] ? get_unmapped_area+0x1f5/0x3f0 [ 31.261493] do_mmap+0x854/0xf00 [ 31.261953] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.262452] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.263019] ksys_mmap_pgoff+0x3af/0x500 [ 31.263529] do_syscall_64+0x3f/0x90 [ 31.264005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.264651] RIP: 0033:0x7f5fcbcacd82 [ 31.265112] 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 [ 31.267250] RSP: 002b:00007ffe3db1c788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.268161] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5fcbcacd82 [ 31.269000] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5fcb0e6000 [ 31.269849] RBP: 00007f5fcb0e6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.270698] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ca812cff70 [ 31.271541] R13: 00007ffe3db1c7a0 R14: 00007ffe3db1c7d0 R15: 00007ffe3db1cb30 [ 31.272392] [ 31.272681] [ 31.272899] Allocated by task 213: [ 31.273325] kasan_save_stack+0x22/0x50 [ 31.273852] kasan_set_track+0x25/0x30 [ 31.274341] __kasan_slab_alloc+0x59/0x70 [ 31.274869] kmem_cache_alloc+0x16b/0x370 [ 31.275383] vm_area_dup+0x20/0x160 [ 31.275838] __split_vma+0x170/0x950 [ 31.276300] split_vma+0xc6/0x110 [ 31.276757] mprotect_fixup+0x8d2/0xb30 [ 31.277259] do_mprotect_pkey+0x87e/0xd40 [ 31.277802] __x64_sys_mprotect+0x78/0xc0 [ 31.278331] do_syscall_64+0x3f/0x90 [ 31.278804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.279441] [ 31.279655] Freed by task 213: [ 31.280045] kasan_save_stack+0x22/0x50 [ 31.280550] kasan_set_track+0x25/0x30 [ 31.281043] kasan_save_free_info+0x2b/0x50 [ 31.281578] __kasan_slab_free+0x10a/0x190 [ 31.282130] kmem_cache_free+0x10d/0x4d0 [ 31.282634] rcu_core+0x8c8/0x2860 [ 31.283078] __do_softirq+0x1b7/0x7d4 [ 31.283561] [ 31.283774] Last potentially related work creation: [ 31.284360] kasan_save_stack+0x22/0x50 [ 31.284860] __kasan_record_aux_stack+0x8e/0xa0 [ 31.285435] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.286088] remove_vma+0x139/0x170 [ 31.286552] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.287114] do_vmi_munmap+0x1f1/0x2b0 [ 31.287596] __vm_munmap+0x138/0x3a0 [ 31.288068] __x64_sys_munmap+0x59/0x80 [ 31.288576] do_syscall_64+0x3f/0x90 [ 31.289057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.289700] [ 31.289923] The buggy address belongs to the object at ffff888016c75bc8 [ 31.289923] which belongs to the cache vm_area_struct of size 168 [ 31.291382] The buggy address is located 88 bytes inside of [ 31.291382] freed 168-byte region [ffff888016c75bc8, ffff888016c75c70) [ 31.292786] [ 31.293000] The buggy address belongs to the physical page: [ 31.293656] page:00000000988faad0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c75 [ 31.294824] memcg:ffff88800dde2701 [ 31.295248] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.295898] page_type: 0xffffffff() [ 31.296345] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.297259] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dde2701 [ 31.298174] page dumped because: kasan: bad access detected [ 31.298841] [ 31.299062] Memory state around the buggy address: [ 31.299610] ffff888016c75b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.300432] ffff888016c75b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.301299] >ffff888016c75c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.302155] ^ [ 31.302680] ffff888016c75c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.303539] ffff888016c75d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.304417] ================================================================== [ 31.305443] Disabling lock debugging due to kernel taint [ 33.345693] BUG: Bad rss-counter state mm:000000004e5bde24 type:MM_FILEPAGES val:33 [ 33.346934] BUG: Bad rss-counter state mm:000000004e5bde24 type:MM_ANONPAGES val:22 [ 33.702784] BUG: Bad rss-counter state mm:00000000ee002c72 type:MM_FILEPAGES val:33 [ 33.703785] BUG: Bad rss-counter state mm:00000000ee002c72 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45784' (ECDSA) to the list of known hosts. 2023/06/19 15:13:17 fuzzer started 2023/06/19 15:13:18 dialing manager at localhost:44161 2023/06/19 15:13:18 checking machine... 2023/06/19 15:13:18 checking revisions... [ 34.428921] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:13:18 testing simple program... [ 34.479085] cgroup: Unknown subsys name 'net' [ 34.530370] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:13:17 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=1ffff110028e5ee8 RCX=0000000000000000 RDX=ffff88800ff6d1c0 RSI=ffffffff81f05558 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff88801472f730 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000005 R13=0000000000200000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c07eb 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 00007f2d7487d900 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=00007f2d73cb4740 CR3=000000000d83e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=808710f5a041021100000000000ae988 XMM05=ae26d19e15257b4100000000001344a0 XMM06=c291bd5c70af25b90000000000133290 XMM07=fb795ef6d65770560000000000123818 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86141eb2 RDX=0000000000000008 RSI=ffff88801814fd88 RDI=ffff88801814f938 RBP=ffff88801814f990 RSP=ffff88801814f8a8 R8 =0000000000000001 R9 =ffff88801814f978 R10=0000000000038001 R11=00000000000229cd R12=ffff88801814f998 R13=ffff88801814f980 R14=ffff88801814fd88 R15=ffff88801814f938 RIP=ffffffff81130400 RFL=00000287 [--S--PC] 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 00007efc951f3900 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=00007ffca3864000 CR3=000000000fede000 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