syzkaller login: [ 30.933963] BUG: Bad rss-counter state mm:00000000243f3754 type:MM_FILEPAGES val:33 [ 30.935122] BUG: Bad rss-counter state mm:00000000243f3754 type:MM_ANONPAGES val:22 [ 31.113198] ================================================================== [ 31.114283] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.115530] Read of size 8 at addr ffff888009aae5c8 by task sshd/220 [ 31.116530] [ 31.116763] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.117741] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.119164] Call Trace: [ 31.119633] [ 31.120012] dump_stack_lvl+0x91/0xf0 [ 31.120544] print_report+0xcc/0x620 [ 31.121107] ? __virt_addr_valid+0x102/0x340 [ 31.121701] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.122382] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.123084] kasan_report+0xbe/0xf0 [ 31.123605] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.124346] vma_interval_tree_remove+0xc75/0xec0 [ 31.125004] vma_prepare+0xc54/0x11a0 [ 31.125532] __split_vma+0x5af/0x950 [ 31.126047] ? __pfx___split_vma+0x10/0x10 [ 31.126644] ? find_held_lock+0x2c/0x110 [ 31.127284] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.127898] ? lock_is_held_type+0x9f/0x120 [ 31.128489] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.129149] ? mtree_range_walk+0x632/0x900 [ 31.129748] ? mas_walk+0x5c7/0x7c0 [ 31.130267] do_vmi_munmap+0x1f1/0x2b0 [ 31.130823] mmap_region+0x1f9/0x2660 [ 31.131352] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.131914] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.132697] ? __pfx_lock_acquire+0x10/0x10 [ 31.133274] ? __pfx_mmap_region+0x10/0x10 [ 31.133856] ? security_mmap_addr+0x7d/0xa0 [ 31.134525] ? get_unmapped_area+0x1f5/0x3f0 [ 31.135117] do_mmap+0x854/0xf00 [ 31.135593] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.136141] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.136763] ksys_mmap_pgoff+0x3af/0x500 [ 31.137320] do_syscall_64+0x3f/0x90 [ 31.137848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.138578] RIP: 0033:0x7fdd48ef5d82 [ 31.139069] 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 [ 31.141424] RSP: 002b:00007fff2f1ff458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.142430] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdd48ef5d82 [ 31.143344] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdd4832f000 [ 31.144248] RBP: 00007fdd4832f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.145163] R10: 0000000000000812 R11: 0000000000000206 R12: 00005586c31bed90 [ 31.146076] R13: 00007fff2f1ff470 R14: 00007fff2f1ff4a0 R15: 00007fff2f1ff800 [ 31.146994] [ 31.147315] [ 31.147553] Allocated by task 213: [ 31.148086] kasan_save_stack+0x22/0x50 [ 31.148641] kasan_set_track+0x25/0x30 [ 31.149187] __kasan_slab_alloc+0x59/0x70 [ 31.149746] kmem_cache_alloc+0x16b/0x370 [ 31.150308] vm_area_dup+0x20/0x160 [ 31.150805] __split_vma+0x170/0x950 [ 31.151309] split_vma+0xc6/0x110 [ 31.151789] mprotect_fixup+0x8d2/0xb30 [ 31.152340] do_mprotect_pkey+0x87e/0xd40 [ 31.152902] __x64_sys_mprotect+0x78/0xc0 [ 31.153467] do_syscall_64+0x3f/0x90 [ 31.153992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.154743] [ 31.154980] Freed by task 213: [ 31.155468] kasan_save_stack+0x22/0x50 [ 31.156014] kasan_set_track+0x25/0x30 [ 31.156540] kasan_save_free_info+0x2b/0x50 [ 31.157111] __kasan_slab_free+0x10a/0x190 [ 31.157712] kmem_cache_free+0x10d/0x4d0 [ 31.158258] rcu_core+0x8c8/0x2860 [ 31.158742] __do_softirq+0x1b7/0x7d4 [ 31.159259] [ 31.159488] Last potentially related work creation: [ 31.160126] kasan_save_stack+0x22/0x50 [ 31.160667] __kasan_record_aux_stack+0x8e/0xa0 [ 31.161279] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.162048] remove_vma+0x139/0x170 [ 31.162555] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.163147] do_vmi_munmap+0x1f1/0x2b0 [ 31.163676] __vm_munmap+0x138/0x3a0 [ 31.164181] __x64_sys_munmap+0x59/0x80 [ 31.164720] do_syscall_64+0x3f/0x90 [ 31.165238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.165944] [ 31.166176] Second to last potentially related work creation: [ 31.166928] kasan_save_stack+0x22/0x50 [ 31.167477] __kasan_record_aux_stack+0x8e/0xa0 [ 31.168103] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.168887] remove_vma+0x139/0x170 [ 31.169381] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.169990] do_vmi_munmap+0x1f1/0x2b0 [ 31.170551] mmap_region+0x1f9/0x2660 [ 31.171076] do_mmap+0x854/0xf00 [ 31.171542] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.172073] ksys_mmap_pgoff+0x3af/0x500 [ 31.172617] do_syscall_64+0x3f/0x90 [ 31.173213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.173984] [ 31.174219] The buggy address belongs to the object at ffff888009aae570 [ 31.174219] which belongs to the cache vm_area_struct of size 168 [ 31.175874] The buggy address is located 88 bytes inside of [ 31.175874] freed 168-byte region [ffff888009aae570, ffff888009aae618) [ 31.177480] [ 31.177724] The buggy address belongs to the physical page: [ 31.178491] page:000000006dae8f63 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9aae [ 31.179710] memcg:ffff88800deda801 [ 31.180177] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.180881] page_type: 0xffffffff() [ 31.181439] raw: 0100000000000200 ffff8880087a0c80 ffffea00003f5c00 000000000000000c [ 31.182448] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800deda801 [ 31.183437] page dumped because: kasan: bad access detected [ 31.184242] [ 31.184480] Memory state around the buggy address: [ 31.185112] ffff888009aae480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.186040] ffff888009aae500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.187080] >ffff888009aae580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.187999] ^ [ 31.188733] ffff888009aae600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.189696] ffff888009aae680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.190706] ================================================================== [ 31.191832] Disabling lock debugging due to kernel taint [ 33.515518] BUG: Bad rss-counter state mm:0000000051079311 type:MM_FILEPAGES val:33 [ 33.516750] BUG: Bad rss-counter state mm:0000000051079311 type:MM_ANONPAGES val:22 [ 33.916645] BUG: Bad rss-counter state mm:000000003347959f type:MM_FILEPAGES val:33 [ 33.917841] BUG: Bad rss-counter state mm:000000003347959f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52618' (ECDSA) to the list of known hosts. 2023/06/20 22:20:47 fuzzer started 2023/06/20 22:20:48 dialing manager at localhost:36067 2023/06/20 22:20:48 checking machine... 2023/06/20 22:20:48 checking revisions... [ 34.646306] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:20:48 testing simple program... [ 34.689881] cgroup: Unknown subsys name 'net' [ 34.761480] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:20:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880180b51c0 RCX=0000000000000000 RDX=ffff8880180b51c0 RSI=ffffffff8140fef6 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888018007be0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888018007cc0 R13=ffffed1003016a38 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c0860 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 00007fcd2b2a4700 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=00007f13a635b350 CR3=00000000190de000 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=30323a3232203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323231 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=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86138b62 RDX=1ffff1100d9e1358 RSI=0000000000000001 RDI=ffff88806cf09ac0 RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =ffffffff86138b66 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000020d09 R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=0000000000000004 R15=ffff88806cf09a70 RIP=ffffffff81131720 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 00007f63a4c7b900 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=00007ffda62b8000 CR3=000000001ab80000 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