[ 60.985733] BUG: Bad rss-counter state mm:00000000e76fb8f3 type:MM_FILEPAGES val:33 [ 60.986613] BUG: Bad rss-counter state mm:00000000e76fb8f3 type:MM_ANONPAGES val:22 [ 61.118033] ================================================================== [ 61.119409] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.120761] Read of size 8 at addr ffff888009729a50 by task sshd/225 [ 61.121715] [ 61.121978] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.123054] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.124283] Call Trace: [ 61.124676] [ 61.125021] dump_stack_lvl+0x91/0xf0 [ 61.125613] print_report+0xcc/0x620 [ 61.126205] ? __virt_addr_valid+0x102/0x340 [ 61.126886] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.127647] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.128394] kasan_report+0xbe/0xf0 [ 61.128984] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.129742] vma_interval_tree_remove+0xc75/0xec0 [ 61.130480] vma_prepare+0xc54/0x11a0 [ 61.131092] __split_vma+0x5af/0x950 [ 61.131670] ? __pfx___split_vma+0x10/0x10 [ 61.132325] ? find_held_lock+0x2c/0x110 [ 61.132957] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.133647] ? lock_is_held_type+0x9f/0x120 [ 61.134308] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.135076] ? mtree_range_walk+0x632/0x900 [ 61.135758] ? mas_walk+0x5c7/0x7c0 [ 61.136342] do_vmi_munmap+0x1f1/0x2b0 [ 61.136948] mmap_region+0x1f9/0x2660 [ 61.137543] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.138173] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.139071] ? __pfx_lock_acquire+0x10/0x10 [ 61.139729] ? __pfx_mmap_region+0x10/0x10 [ 61.140383] ? security_mmap_addr+0x7d/0xa0 [ 61.141033] ? get_unmapped_area+0x1f5/0x3f0 [ 61.141707] do_mmap+0x854/0xf00 [ 61.142234] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.142864] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.143546] ksys_mmap_pgoff+0x3af/0x500 [ 61.144175] do_syscall_64+0x3f/0x90 [ 61.144762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.145562] RIP: 0033:0x7fd48dfe3d82 [ 61.146131] 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 [ 61.148808] RSP: 002b:00007fff99e10e28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.149932] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd48dfe3d82 [ 61.150937] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd48d41d000 [ 61.151738] RBP: 00007fd48d41d000 R08: 0000000000000009 R09: 0000000000001000 [ 61.152538] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a562e06f60 [ 61.153330] R13: 00007fff99e10e40 R14: 00007fff99e10e70 R15: 00007fff99e111d0 [ 61.154132] [ 61.154407] [ 61.154614] Allocated by task 211: [ 61.155039] kasan_save_stack+0x22/0x50 [ 61.155520] kasan_set_track+0x25/0x30 [ 61.155987] __kasan_slab_alloc+0x59/0x70 [ 61.156480] kmem_cache_alloc+0x16b/0x370 [ 61.156970] vm_area_dup+0x20/0x160 [ 61.157398] __split_vma+0x170/0x950 [ 61.157836] split_vma+0xc6/0x110 [ 61.158250] mprotect_fixup+0x8d2/0xb30 [ 61.158728] do_mprotect_pkey+0x87e/0xd40 [ 61.159221] __x64_sys_mprotect+0x78/0xc0 [ 61.159716] do_syscall_64+0x3f/0x90 [ 61.160207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.160889] [ 61.161120] Freed by task 211: [ 61.161578] kasan_save_stack+0x22/0x50 [ 61.162113] kasan_set_track+0x25/0x30 [ 61.162639] kasan_save_free_info+0x2b/0x50 [ 61.163226] __kasan_slab_free+0x10a/0x190 [ 61.163794] kmem_cache_free+0x10d/0x4d0 [ 61.164339] rcu_core+0x8c8/0x2860 [ 61.164815] __do_softirq+0x1b7/0x7d4 [ 61.165328] [ 61.165561] Last potentially related work creation: [ 61.166185] kasan_save_stack+0x22/0x50 [ 61.166731] __kasan_record_aux_stack+0x8e/0xa0 [ 61.167345] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.168029] remove_vma+0x139/0x170 [ 61.168513] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.169107] do_vmi_munmap+0x1f1/0x2b0 [ 61.169623] __vm_munmap+0x138/0x3a0 [ 61.170152] __x64_sys_munmap+0x59/0x80 [ 61.170744] do_syscall_64+0x3f/0x90 [ 61.171302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.172059] [ 61.172309] The buggy address belongs to the object at ffff8880097299f8 [ 61.172309] which belongs to the cache vm_area_struct of size 168 [ 61.174035] The buggy address is located 88 bytes inside of [ 61.174035] freed 168-byte region [ffff8880097299f8, ffff888009729aa0) [ 61.175692] [ 61.175946] The buggy address belongs to the physical page: [ 61.176721] page:00000000842c5ca3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9729 [ 61.178018] memcg:ffff88800df77001 [ 61.178519] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.179287] page_type: 0xffffffff() [ 61.179814] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.180895] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df77001 [ 61.181966] page dumped because: kasan: bad access detected [ 61.182768] [ 61.183021] Memory state around the buggy address: [ 61.183703] ffff888009729900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.184709] ffff888009729980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 61.185720] >ffff888009729a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.186729] ^ [ 61.187478] ffff888009729a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 61.188377] ffff888009729b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.189266] ================================================================== [ 61.190229] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 62.941082] BUG: Bad rss-counter state mm:00000000e217e2b3 type:MM_FILEPAGES val:33 [ 62.942172] BUG: Bad rss-counter state mm:00000000e217e2b3 type:MM_ANONPAGES val:22 [ 63.514195] BUG: Bad rss-counter state mm:000000009c1d2543 type:MM_FILEPAGES val:33 [ 63.515350] BUG: Bad rss-counter state mm:000000009c1d2543 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44253' (ECDSA) to the list of known hosts. 2023/06/20 11:13:04 fuzzer started 2023/06/20 11:13:04 dialing manager at localhost:36067 2023/06/20 11:13:04 checking machine... 2023/06/20 11:13:04 checking revisions... [ 64.180007] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:13:04 testing simple program... [ 64.226423] cgroup: Unknown subsys name 'net' [ 64.291042] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:13:04 Registers: info registers vcpu 0 RAX=ffffffff81288ac5 RBX=ffffffff813ad470 RCX=ffffffff864b3801 RDX=1ffff1100d9c135e RSI=ffffffff81288ac5 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =ffffffff864b381e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b547f R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff8880093c7b30 RIP=ffffffff84538440 RFL=00000286 [--S--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 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=00007fe3dcb9f840 CR3=000000000ceb6000 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=b7c08e28794aa292ca4104d1d44b1a93 XMM02=2c67c8bc2e329bc3000000000011b0e0 XMM03=fb795ef6d65770560000000000121e20 XMM04=2e0973f785390ae500000000000ae988 XMM05=e7a3b750822471340000000000131998 XMM06=e6f41e59de9f14300000000000130b70 XMM07=e042d86d42eb936e00000000001220f8 XMM08=ec9398ea381e4b2c000000000011b140 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff815343f6 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81807056 RSP=ffff88801c877b08 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800844f780 R13=0000000000000000 R14=0000000000000246 R15=ffff88806cf3de00 RIP=ffffffff8135b960 RFL=00000016 [----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 00007ff599998900 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=00007ffc006da000 CR3=000000000ee1c000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000