syzkaller login: [ 29.973152] BUG: Bad rss-counter state mm:000000004f1952e6 type:MM_FILEPAGES val:33 [ 29.974623] BUG: Bad rss-counter state mm:000000004f1952e6 type:MM_ANONPAGES val:22 [ 30.124994] ================================================================== [ 30.125896] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.126845] Read of size 8 at addr ffff88800df5d310 by task sshd/220 [ 30.127702] [ 30.128030] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.128907] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.129883] Call Trace: [ 30.130224] [ 30.130515] dump_stack_lvl+0x91/0xf0 [ 30.131012] print_report+0xcc/0x620 [ 30.131505] ? __virt_addr_valid+0x102/0x340 [ 30.132063] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.132690] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.133311] kasan_report+0xbe/0xf0 [ 30.133787] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.134410] vma_interval_tree_remove+0xc75/0xec0 [ 30.135011] vma_prepare+0xc54/0x11a0 [ 30.135480] __split_vma+0x5af/0x950 [ 30.135977] ? __pfx___split_vma+0x10/0x10 [ 30.136498] ? find_held_lock+0x2c/0x110 [ 30.137018] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.137579] ? lock_is_held_type+0x9f/0x120 [ 30.138115] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.138714] ? mtree_range_walk+0x632/0x900 [ 30.139260] ? mas_walk+0x5c7/0x7c0 [ 30.139729] do_vmi_munmap+0x1f1/0x2b0 [ 30.140230] mmap_region+0x1f9/0x2660 [ 30.140714] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.141232] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.141955] ? __pfx_lock_acquire+0x10/0x10 [ 30.142498] ? __pfx_mmap_region+0x10/0x10 [ 30.143027] ? security_mmap_addr+0x7d/0xa0 [ 30.143556] ? get_unmapped_area+0x1f5/0x3f0 [ 30.144115] do_mmap+0x854/0xf00 [ 30.144559] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.145058] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.145624] ksys_mmap_pgoff+0x3af/0x500 [ 30.146133] do_syscall_64+0x3f/0x90 [ 30.146613] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.147258] RIP: 0033:0x7f8c43efad82 [ 30.147718] 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 [ 30.149848] RSP: 002b:00007fff04eab148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.150772] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8c43efad82 [ 30.151618] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8c43334000 [ 30.152472] RBP: 00007f8c43334000 R08: 0000000000000009 R09: 0000000000001000 [ 30.153316] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a5c8c6d90 [ 30.154161] R13: 00007fff04eab160 R14: 00007fff04eab190 R15: 00007fff04eab4f0 [ 30.155006] [ 30.155298] [ 30.155518] Allocated by task 212: [ 30.155958] kasan_save_stack+0x22/0x50 [ 30.156461] kasan_set_track+0x25/0x30 [ 30.156951] __kasan_slab_alloc+0x59/0x70 [ 30.157481] kmem_cache_alloc+0x16b/0x370 [ 30.157988] vm_area_dup+0x20/0x160 [ 30.158447] __split_vma+0x170/0x950 [ 30.158920] split_vma+0xc6/0x110 [ 30.159353] mprotect_fixup+0x8d2/0xb30 [ 30.159857] do_mprotect_pkey+0x87e/0xd40 [ 30.160398] __x64_sys_mprotect+0x78/0xc0 [ 30.160917] do_syscall_64+0x3f/0x90 [ 30.161389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.162045] [ 30.162255] Freed by task 212: [ 30.162649] kasan_save_stack+0x22/0x50 [ 30.163155] kasan_set_track+0x25/0x30 [ 30.163655] kasan_save_free_info+0x2b/0x50 [ 30.164202] __kasan_slab_free+0x10a/0x190 [ 30.164739] kmem_cache_free+0x10d/0x4d0 [ 30.165251] rcu_core+0x8c8/0x2860 [ 30.165705] __do_softirq+0x1b7/0x7d4 [ 30.166183] [ 30.166396] Last potentially related work creation: [ 30.166982] kasan_save_stack+0x22/0x50 [ 30.167481] __kasan_record_aux_stack+0x8e/0xa0 [ 30.168054] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.168701] remove_vma+0x139/0x170 [ 30.169161] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.169773] do_vmi_munmap+0x1f1/0x2b0 [ 30.170258] __vm_munmap+0x138/0x3a0 [ 30.170733] __x64_sys_munmap+0x59/0x80 [ 30.171234] do_syscall_64+0x3f/0x90 [ 30.171714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.172367] [ 30.172585] Second to last potentially related work creation: [ 30.173273] kasan_save_stack+0x22/0x50 [ 30.173774] __kasan_record_aux_stack+0x8e/0xa0 [ 30.174353] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.174998] remove_vma+0x139/0x170 [ 30.175449] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.176023] do_vmi_munmap+0x1f1/0x2b0 [ 30.176513] mmap_region+0x1f9/0x2660 [ 30.176994] do_mmap+0x854/0xf00 [ 30.177434] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.177930] ksys_mmap_pgoff+0x3af/0x500 [ 30.178446] do_syscall_64+0x3f/0x90 [ 30.178932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.179574] [ 30.179791] The buggy address belongs to the object at ffff88800df5d2b8 [ 30.179791] which belongs to the cache vm_area_struct of size 168 [ 30.181256] The buggy address is located 88 bytes inside of [ 30.181256] freed 168-byte region [ffff88800df5d2b8, ffff88800df5d360) [ 30.182652] [ 30.182869] The buggy address belongs to the physical page: [ 30.183514] page:0000000062e83a3f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf5d [ 30.184608] memcg:ffff88800d4bd101 [ 30.185039] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.185674] page_type: 0xffffffff() [ 30.186120] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 30.187034] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d4bd101 [ 30.187932] page dumped because: kasan: bad access detected [ 30.188584] [ 30.188799] Memory state around the buggy address: [ 30.189374] ffff88800df5d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.190222] ffff88800df5d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.191066] >ffff88800df5d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.191930] ^ [ 30.192397] ffff88800df5d380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.193247] ffff88800df5d400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.194094] ================================================================== [ 30.195072] Disabling lock debugging due to kernel taint [ 32.146187] BUG: Bad rss-counter state mm:00000000a2050df1 type:MM_FILEPAGES val:33 [ 32.147358] BUG: Bad rss-counter state mm:00000000a2050df1 type:MM_ANONPAGES val:22 [ 32.555884] BUG: Bad rss-counter state mm:00000000557879da type:MM_FILEPAGES val:33 [ 32.556892] BUG: Bad rss-counter state mm:00000000557879da type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6194' (ECDSA) to the list of known hosts. 2023/06/20 03:28:43 fuzzer started 2023/06/20 03:28:44 dialing manager at localhost:44161 2023/06/20 03:28:44 checking machine... 2023/06/20 03:28:44 checking revisions... [ 33.263375] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:28:44 testing simple program... [ 33.314720] cgroup: Unknown subsys name 'net' [ 33.355241] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:28:42 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffd38246478 CR3=0000000005482000 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=00007fa7642b2510000055aaf8820790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bc0471 RBX=ffffffff85e0238c RCX=ffffffff8185a003 RDX=0000000000000000 RSI=ffffffff8613fb48 RDI=ffffffff85e0237c RBP=ffffffff85e0237c RSP=ffff88806cf099b8 R8 =ffffffff8613fb48 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000223ea R12=ffffffff85e023a0 R13=ffffffff85e0237c R14=ffffffff85e0237c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007fdaea5a3900 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=00007f399747f650 CR3=000000000d6c4000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0983fe96db2326cf00000000000ae988 XMM05=b9d5de3764b4907a00000000001364b8 XMM06=4994ee87984707470000000000135258 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000