[ 24.046330] BUG: Bad rss-counter state mm:00000000a4b0fc9a type:MM_FILEPAGES val:33 [ 24.047557] BUG: Bad rss-counter state mm:00000000a4b0fc9a type:MM_ANONPAGES val:22 [ 24.081842] ================================================================== [ 24.082518] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.083231] Read of size 8 at addr ffff8880094be6b0 by task sshd/218 [ 24.083803] [ 24.083968] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.084616] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.085350] Call Trace: [ 24.085593] [ 24.085818] dump_stack_lvl+0x91/0xf0 [ 24.086346] print_report+0xcc/0x620 [ 24.086871] ? __virt_addr_valid+0x102/0x340 [ 24.087451] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.088096] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.088749] kasan_report+0xbe/0xf0 [ 24.089244] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.089912] vma_interval_tree_remove+0xc75/0xec0 [ 24.090548] vma_prepare+0xc54/0x11a0 [ 24.091054] __split_vma+0x5af/0x950 [ 24.091560] ? __pfx___split_vma+0x10/0x10 [ 24.092128] ? find_held_lock+0x2c/0x110 [ 24.092681] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.093290] ? lock_is_held_type+0x9f/0x120 [ 24.093897] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.094544] ? mtree_range_walk+0x632/0x900 [ 24.095140] ? mas_walk+0x5c7/0x7c0 [ 24.095651] do_vmi_munmap+0x1f1/0x2b0 [ 24.096178] mmap_region+0x1f9/0x2660 [ 24.096698] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.097254] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.098035] ? __pfx_lock_acquire+0x10/0x10 [ 24.098621] ? __pfx_mmap_region+0x10/0x10 [ 24.099202] ? security_mmap_addr+0x7d/0xa0 [ 24.099784] ? get_unmapped_area+0x1f5/0x3f0 [ 24.100369] do_mmap+0x854/0xf00 [ 24.100848] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.101384] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.102007] ksys_mmap_pgoff+0x3af/0x500 [ 24.102561] do_syscall_64+0x3f/0x90 [ 24.103087] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.103792] RIP: 0033:0x7f9fa3932d82 [ 24.104293] 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 [ 24.106642] RSP: 002b:00007fff3428a228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.107646] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9fa3932d82 [ 24.108578] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9fa2d6c000 [ 24.109508] RBP: 00007f9fa2d6c000 R08: 0000000000000009 R09: 0000000000001000 [ 24.110444] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559f56c13d90 [ 24.111376] R13: 00007fff3428a240 R14: 00007fff3428a270 R15: 00007fff3428a5d0 [ 24.112329] [ 24.112657] [ 24.112895] Allocated by task 209: [ 24.113370] kasan_save_stack+0x22/0x50 [ 24.113944] kasan_set_track+0x25/0x30 [ 24.114492] __kasan_slab_alloc+0x59/0x70 [ 24.115077] kmem_cache_alloc+0x16b/0x370 [ 24.115653] vm_area_dup+0x20/0x160 [ 24.116162] __split_vma+0x170/0x950 [ 24.116685] split_vma+0xc6/0x110 [ 24.117173] mprotect_fixup+0x8d2/0xb30 [ 24.117751] do_mprotect_pkey+0x87e/0xd40 [ 24.118332] __x64_sys_mprotect+0x78/0xc0 [ 24.118910] do_syscall_64+0x3f/0x90 [ 24.119444] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.120168] [ 24.120411] Freed by task 209: [ 24.120854] kasan_save_stack+0x22/0x50 [ 24.121420] kasan_set_track+0x25/0x30 [ 24.121986] kasan_save_free_info+0x2b/0x50 [ 24.122593] __kasan_slab_free+0x10a/0x190 [ 24.123196] kmem_cache_free+0x10d/0x4d0 [ 24.123774] rcu_core+0x8c8/0x2860 [ 24.124276] __do_softirq+0x1b7/0x7d4 [ 24.124814] [ 24.125058] Last potentially related work creation: [ 24.125734] kasan_save_stack+0x22/0x50 [ 24.126301] __kasan_record_aux_stack+0x8e/0xa0 [ 24.126954] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.127712] remove_vma+0x139/0x170 [ 24.128224] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.128850] do_vmi_munmap+0x1f1/0x2b0 [ 24.129403] __vm_munmap+0x138/0x3a0 [ 24.129945] __x64_sys_munmap+0x59/0x80 [ 24.130517] do_syscall_64+0x3f/0x90 [ 24.131053] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.131781] [ 24.132024] Second to last potentially related work creation: [ 24.132797] kasan_save_stack+0x22/0x50 [ 24.133370] __kasan_record_aux_stack+0x8e/0xa0 [ 24.133983] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.134617] remove_vma+0x139/0x170 [ 24.135139] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.135784] do_vmi_munmap+0x1f1/0x2b0 [ 24.136343] mmap_region+0x1f9/0x2660 [ 24.136889] do_mmap+0x854/0xf00 [ 24.137389] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.137923] ksys_mmap_pgoff+0x3af/0x500 [ 24.138416] do_syscall_64+0x3f/0x90 [ 24.138938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.139674] [ 24.139925] The buggy address belongs to the object at ffff8880094be658 [ 24.139925] which belongs to the cache vm_area_struct of size 168 [ 24.141626] The buggy address is located 88 bytes inside of [ 24.141626] freed 168-byte region [ffff8880094be658, ffff8880094be700) [ 24.143267] [ 24.143517] The buggy address belongs to the physical page: [ 24.144187] page:00000000a54ae58a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94be [ 24.145380] memcg:ffff8880147fb601 [ 24.145890] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.146632] page_type: 0xffffffff() [ 24.147074] raw: 0100000000000200 ffff8880087a0c80 ffffea000032ec40 000000000000000a [ 24.147973] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880147fb601 [ 24.148862] page dumped because: kasan: bad access detected [ 24.149506] [ 24.149723] Memory state around the buggy address: [ 24.150288] ffff8880094be580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.151132] ffff8880094be600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.151979] >ffff8880094be680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.152819] ^ [ 24.153395] ffff8880094be700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 24.154253] ffff8880094be780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 24.155093] ================================================================== [ 24.155992] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.782560] BUG: Bad rss-counter state mm:00000000102e8dfb type:MM_FILEPAGES val:33 [ 25.783124] BUG: Bad rss-counter state mm:00000000102e8dfb type:MM_ANONPAGES val:22 [ 26.222779] BUG: Bad rss-counter state mm:00000000ee00e9e5 type:MM_FILEPAGES val:33 [ 26.223786] BUG: Bad rss-counter state mm:00000000ee00e9e5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25307' (ECDSA) to the list of known hosts. 2023/06/20 14:22:02 fuzzer started 2023/06/20 14:22:02 dialing manager at localhost:36067 2023/06/20 14:22:02 checking machine... 2023/06/20 14:22:02 checking revisions... [ 26.977235] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:22:02 testing simple program... [ 27.024761] cgroup: Unknown subsys name 'net' [ 27.077877] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:22:02 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff83ab1b35 RDI=ffff888015ee9f34 RBP=0000000000000000 RSP=ffff8880169e7500 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=000008b9000008b9 R12=0000000000000000 R13=00000000000000cb R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff814c0871 RFL=00000293 [--S-A-C] 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 00007f07f3566900 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=00007fff043fc000 CR3=000000000f8d8000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ff472326010 CR3=000000000e65c000 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=2031303a32323a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a32323a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000