syzkaller login: [ 30.309695] BUG: Bad rss-counter state mm:00000000c791afdb type:MM_FILEPAGES val:33 [ 30.310691] BUG: Bad rss-counter state mm:00000000c791afdb type:MM_ANONPAGES val:22 [ 30.469761] ================================================================== [ 30.470679] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.471631] Read of size 8 at addr ffff888018ea9310 by task sshd/219 [ 30.472505] [ 30.472740] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.473613] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.474626] Call Trace: [ 30.474949] [ 30.475240] dump_stack_lvl+0x91/0xf0 [ 30.475738] print_report+0xcc/0x620 [ 30.476229] ? __virt_addr_valid+0x102/0x340 [ 30.476796] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.477418] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.478048] kasan_report+0xbe/0xf0 [ 30.478532] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.479165] vma_interval_tree_remove+0xc75/0xec0 [ 30.479779] vma_prepare+0xc54/0x11a0 [ 30.480271] __split_vma+0x5af/0x950 [ 30.480785] ? __pfx___split_vma+0x10/0x10 [ 30.481316] ? find_held_lock+0x2c/0x110 [ 30.481847] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.482424] ? lock_is_held_type+0x9f/0x120 [ 30.482989] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.483604] ? mtree_range_walk+0x632/0x900 [ 30.484164] ? mas_walk+0x5c7/0x7c0 [ 30.484669] do_vmi_munmap+0x1f1/0x2b0 [ 30.485172] mmap_region+0x1f9/0x2660 [ 30.485655] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.486185] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.486900] ? __pfx_lock_acquire+0x10/0x10 [ 30.487446] ? __pfx_mmap_region+0x10/0x10 [ 30.487991] ? security_mmap_addr+0x7d/0xa0 [ 30.488545] ? get_unmapped_area+0x1f5/0x3f0 [ 30.489118] do_mmap+0x854/0xf00 [ 30.489576] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.490075] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.490649] ksys_mmap_pgoff+0x3af/0x500 [ 30.491171] do_syscall_64+0x3f/0x90 [ 30.491660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.492319] RIP: 0033:0x7fcd11917d82 [ 30.492791] 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 [ 30.494987] RSP: 002b:00007fff760b96c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.495922] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcd11917d82 [ 30.496793] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcd10d51000 [ 30.497658] RBP: 00007fcd10d51000 R08: 0000000000000009 R09: 0000000000001000 [ 30.498531] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561ced639f70 [ 30.499401] R13: 00007fff760b96e0 R14: 00007fff760b9710 R15: 00007fff760b9a70 [ 30.500293] [ 30.500607] [ 30.500823] Allocated by task 212: [ 30.501254] kasan_save_stack+0x22/0x50 [ 30.501772] kasan_set_track+0x25/0x30 [ 30.502282] __kasan_slab_alloc+0x59/0x70 [ 30.502828] kmem_cache_alloc+0x16b/0x370 [ 30.503351] vm_area_dup+0x20/0x160 [ 30.503813] __split_vma+0x170/0x950 [ 30.504286] split_vma+0xc6/0x110 [ 30.504738] mprotect_fixup+0x8d2/0xb30 [ 30.505250] do_mprotect_pkey+0x87e/0xd40 [ 30.505774] __x64_sys_mprotect+0x78/0xc0 [ 30.506305] do_syscall_64+0x3f/0x90 [ 30.506787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.507443] [ 30.507661] Freed by task 19: [ 30.508050] kasan_save_stack+0x22/0x50 [ 30.508581] kasan_set_track+0x25/0x30 [ 30.509077] kasan_save_free_info+0x2b/0x50 [ 30.509615] __kasan_slab_free+0x10a/0x190 [ 30.510156] kmem_cache_free+0x10d/0x4d0 [ 30.510668] rcu_core+0x8c8/0x2860 [ 30.511118] __do_softirq+0x1b7/0x7d4 [ 30.511601] [ 30.511817] Last potentially related work creation: [ 30.512410] kasan_save_stack+0x22/0x50 [ 30.512922] __kasan_record_aux_stack+0x8e/0xa0 [ 30.513535] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.514223] remove_vma+0x139/0x170 [ 30.514713] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.515312] do_vmi_munmap+0x1f1/0x2b0 [ 30.515833] __vm_munmap+0x138/0x3a0 [ 30.516334] __x64_sys_munmap+0x59/0x80 [ 30.516870] do_syscall_64+0x3f/0x90 [ 30.517382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.518081] [ 30.518305] Second to last potentially related work creation: [ 30.519044] kasan_save_stack+0x22/0x50 [ 30.519589] __kasan_record_aux_stack+0x8e/0xa0 [ 30.520200] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.520895] remove_vma+0x139/0x170 [ 30.521371] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.521955] do_vmi_munmap+0x1f1/0x2b0 [ 30.522466] mmap_region+0x1f9/0x2660 [ 30.522968] do_mmap+0x854/0xf00 [ 30.523422] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.523929] ksys_mmap_pgoff+0x3af/0x500 [ 30.524457] do_syscall_64+0x3f/0x90 [ 30.524967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.525636] [ 30.525861] The buggy address belongs to the object at ffff888018ea92b8 [ 30.525861] which belongs to the cache vm_area_struct of size 168 [ 30.527396] The buggy address is located 88 bytes inside of [ 30.527396] freed 168-byte region [ffff888018ea92b8, ffff888018ea9360) [ 30.528877] [ 30.529102] The buggy address belongs to the physical page: [ 30.529783] page:00000000e6c4beb7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ea9 [ 30.530935] memcg:ffff88800fbcdd01 [ 30.531385] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.532127] page_type: 0xffffffff() [ 30.532619] raw: 0100000000000200 ffff8880087a0c80 ffffea000025e640 000000000000000d [ 30.533595] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fbcdd01 [ 30.534536] page dumped because: kasan: bad access detected [ 30.535218] [ 30.535446] Memory state around the buggy address: [ 30.536066] ffff888018ea9200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.536983] ffff888018ea9280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.537903] >ffff888018ea9300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.538806] ^ [ 30.539301] ffff888018ea9380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.540209] ffff888018ea9400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.541099] ================================================================== [ 30.542159] Disabling lock debugging due to kernel taint [ 32.946523] BUG: Bad rss-counter state mm:0000000091515180 type:MM_FILEPAGES val:33 [ 32.948038] BUG: Bad rss-counter state mm:0000000091515180 type:MM_ANONPAGES val:22 [ 33.435826] BUG: Bad rss-counter state mm:000000001cc94e13 type:MM_FILEPAGES val:33 [ 33.436908] BUG: Bad rss-counter state mm:000000001cc94e13 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61186' (ECDSA) to the list of known hosts. 2023/06/21 06:16:32 fuzzer started 2023/06/21 06:16:32 dialing manager at localhost:36067 2023/06/21 06:16:32 checking machine... 2023/06/21 06:16:32 checking revisions... [ 34.118808] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:16:32 testing simple program... [ 34.167277] cgroup: Unknown subsys name 'net' [ 34.200863] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:16:31 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fd2d4ac2070 CR3=0000000010062000 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=36313a3630203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343130 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=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff888010337f28 RSI=ffff888010337ef0 RDI=ffff888010337898 RBP=ffff888010330000 RSP=ffff888010337858 R8 =0000000000000001 R9 =ffff8880103378c8 R10=0000000000038001 R11=000000000008a966 R12=ffff8880103378e8 R13=ffff8880103378d0 R14=ffff888010337ef0 R15=ffff888010337888 RIP=ffffffff81130930 RFL=00000296 [--S-AP-] 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 00007fb8b313e900 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=00007ffcfa582000 CR3=0000000019a84000 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=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000