syzkaller login: [ 31.465934] BUG: Bad rss-counter state mm:000000005a23af4a type:MM_FILEPAGES val:33 [ 31.467244] BUG: Bad rss-counter state mm:000000005a23af4a type:MM_ANONPAGES val:22 [ 31.575013] ================================================================== [ 31.575927] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.576869] Read of size 8 at addr ffff88800fe18140 by task sshd/220 [ 31.577630] [ 31.577850] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.578861] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.579831] Call Trace: [ 31.580151] [ 31.580448] dump_stack_lvl+0x91/0xf0 [ 31.580945] print_report+0xcc/0x620 [ 31.581425] ? __virt_addr_valid+0x102/0x340 [ 31.581971] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.582584] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.583195] kasan_report+0xbe/0xf0 [ 31.583681] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.584297] vma_interval_tree_remove+0xc75/0xec0 [ 31.584917] vma_prepare+0xc54/0x11a0 [ 31.585394] __split_vma+0x5af/0x950 [ 31.585872] ? __pfx___split_vma+0x10/0x10 [ 31.586396] ? find_held_lock+0x2c/0x110 [ 31.586927] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.587490] ? lock_is_held_type+0x9f/0x120 [ 31.588024] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.588626] ? mtree_range_walk+0x632/0x900 [ 31.589187] ? mas_walk+0x5c7/0x7c0 [ 31.589661] do_vmi_munmap+0x1f1/0x2b0 [ 31.590157] mmap_region+0x1f9/0x2660 [ 31.590646] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.591154] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.591866] ? __pfx_lock_acquire+0x10/0x10 [ 31.592406] ? __pfx_mmap_region+0x10/0x10 [ 31.592945] ? security_mmap_addr+0x7d/0xa0 [ 31.593473] ? get_unmapped_area+0x1f5/0x3f0 [ 31.594023] do_mmap+0x854/0xf00 [ 31.594465] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.594961] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.595522] ksys_mmap_pgoff+0x3af/0x500 [ 31.596034] do_syscall_64+0x3f/0x90 [ 31.596506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.597171] RIP: 0033:0x7efd08236d82 [ 31.597632] 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 [ 31.599746] RSP: 002b:00007ffd78a641f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.600649] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efd08236d82 [ 31.601496] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efd07670000 [ 31.602344] RBP: 00007efd07670000 R08: 0000000000000009 R09: 0000000000001000 [ 31.603211] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559de325bec0 [ 31.604054] R13: 00007ffd78a64210 R14: 00007ffd78a64240 R15: 00007ffd78a645a0 [ 31.604922] [ 31.605215] [ 31.605430] Allocated by task 213: [ 31.605854] kasan_save_stack+0x22/0x50 [ 31.606357] kasan_set_track+0x25/0x30 [ 31.606850] __kasan_slab_alloc+0x59/0x70 [ 31.607373] kmem_cache_alloc+0x16b/0x370 [ 31.607891] vm_area_dup+0x20/0x160 [ 31.608348] __split_vma+0x170/0x950 [ 31.608839] split_vma+0xc6/0x110 [ 31.609279] mprotect_fixup+0x8d2/0xb30 [ 31.609779] do_mprotect_pkey+0x87e/0xd40 [ 31.610302] __x64_sys_mprotect+0x78/0xc0 [ 31.610816] do_syscall_64+0x3f/0x90 [ 31.611291] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.611932] [ 31.612142] Freed by task 203: [ 31.612527] kasan_save_stack+0x22/0x50 [ 31.613032] kasan_set_track+0x25/0x30 [ 31.613524] kasan_save_free_info+0x2b/0x50 [ 31.614051] __kasan_slab_free+0x10a/0x190 [ 31.614582] kmem_cache_free+0x10d/0x4d0 [ 31.615090] rcu_core+0x8c8/0x2860 [ 31.615529] __do_softirq+0x1b7/0x7d4 [ 31.616012] [ 31.616227] Last potentially related work creation: [ 31.616832] kasan_save_stack+0x22/0x50 [ 31.617333] __kasan_record_aux_stack+0x8e/0xa0 [ 31.617900] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.618540] remove_vma+0x139/0x170 [ 31.618989] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.619622] do_vmi_munmap+0x1f1/0x2b0 [ 31.620109] __vm_munmap+0x138/0x3a0 [ 31.620575] __x64_sys_munmap+0x59/0x80 [ 31.621081] do_syscall_64+0x3f/0x90 [ 31.621556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.622199] [ 31.622418] The buggy address belongs to the object at ffff88800fe180e8 [ 31.622418] which belongs to the cache vm_area_struct of size 168 [ 31.623888] The buggy address is located 88 bytes inside of [ 31.623888] freed 168-byte region [ffff88800fe180e8, ffff88800fe18190) [ 31.625296] [ 31.625510] The buggy address belongs to the physical page: [ 31.626174] page:000000002c4d250b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe18 [ 31.627251] memcg:ffff88801a475a01 [ 31.627679] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.628321] page_type: 0xffffffff() [ 31.628790] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.629709] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a475a01 [ 31.630615] page dumped because: kasan: bad access detected [ 31.631275] [ 31.631492] Memory state around the buggy address: [ 31.632074] ffff88800fe18000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.632930] ffff88800fe18080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.633783] >ffff88800fe18100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.634635] ^ [ 31.635272] ffff88800fe18180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.636126] ffff88800fe18200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.637005] ================================================================== [ 31.638010] Disabling lock debugging due to kernel taint [ 33.701940] BUG: Bad rss-counter state mm:000000000dd1229d type:MM_FILEPAGES val:33 [ 33.703124] BUG: Bad rss-counter state mm:000000000dd1229d type:MM_ANONPAGES val:22 [ 34.176595] BUG: Bad rss-counter state mm:00000000e3b1687a type:MM_FILEPAGES val:33 [ 34.177790] BUG: Bad rss-counter state mm:00000000e3b1687a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49956' (ECDSA) to the list of known hosts. 2023/06/20 14:21:46 fuzzer started 2023/06/20 14:21:46 dialing manager at localhost:36067 2023/06/20 14:21:46 checking machine... 2023/06/20 14:21:46 checking revisions... [ 34.862058] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:21:46 testing simple program... [ 34.910343] cgroup: Unknown subsys name 'net' [ 34.948512] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:21:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000008000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81b3c240 RDI=ffff8880176bbd6c RBP=ffff888018e67428 RSP=ffff888017de78b0 R8 =0000000000000003 R9 =0000000000008000 R10=0000000000008000 R11=00000000000b6a61 R12=ffff8880176bbd00 R13=ffff888016157028 R14=ffff888018e66fa8 R15=ffff888017de79d8 RIP=ffffffff81b3c274 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 00007f1e0fe33700 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=00007f4a6d4e50b0 CR3=000000000dc90000 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=2035343a31323a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a31323a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf09b30 RCX=0000000000000000 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff88806cf09a98 RBP=ffff888008d951c0 RSP=ffff88806cf09a40 R8 =0000000000000004 R9 =0000000000000000 R10=ffff88806cf09a98 R11=0000000000000000 R12=0000000000000000 R13=ffff88806cf09ac0 R14=ffff888008d951c0 R15=ffff88806cf09a98 RIP=ffffffff8451341a RFL=00000247 [---Z-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 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=00007f96881bdfb0 CR3=000000000f670000 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=320107905581229cf74fd7ef8cf78cc1 XMM02=2c67c8bc2e329bc3000000000011acf0 XMM03=fb795ef6d65770560000000000122598 XMM04=05abb044fab228b400000000000ae988 XMM05=19e9129bd510f2350000000000132408 XMM06=f45e5b8ed1adc94a0000000000131270 XMM07=e042d86d42eb936e0000000000122818 XMM08=07ac1f5807ed3ccb000000000011ad50 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000