[ 24.027058] BUG: Bad rss-counter state mm:000000002cff9561 type:MM_FILEPAGES val:32 [ 24.028572] BUG: Bad rss-counter state mm:000000002cff9561 type:MM_ANONPAGES val:22 [ 24.199739] ================================================================== [ 24.200702] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.201712] Read of size 8 at addr ffff8880096dba50 by task sshd/220 [ 24.202528] [ 24.202772] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.203795] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.204869] Call Trace: [ 24.205241] [ 24.205555] dump_stack_lvl+0x91/0xf0 [ 24.206084] print_report+0xcc/0x620 [ 24.206623] ? __virt_addr_valid+0x102/0x340 [ 24.207219] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.207890] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.208538] kasan_report+0xbe/0xf0 [ 24.209047] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.209714] vma_interval_tree_remove+0xc75/0xec0 [ 24.210359] vma_prepare+0xc54/0x11a0 [ 24.210888] __split_vma+0x5af/0x950 [ 24.211391] ? __pfx___split_vma+0x10/0x10 [ 24.211957] ? find_held_lock+0x2c/0x110 [ 24.212520] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.213122] ? lock_is_held_type+0x9f/0x120 [ 24.213706] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.214352] ? mtree_range_walk+0x632/0x900 [ 24.214971] ? mas_walk+0x5c7/0x7c0 [ 24.215481] do_vmi_munmap+0x1f1/0x2b0 [ 24.216006] mmap_region+0x1f9/0x2660 [ 24.216536] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.217092] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.217877] ? __pfx_lock_acquire+0x10/0x10 [ 24.218449] ? __pfx_mmap_region+0x10/0x10 [ 24.219035] ? security_mmap_addr+0x7d/0xa0 [ 24.219609] ? get_unmapped_area+0x1f5/0x3f0 [ 24.220202] do_mmap+0x854/0xf00 [ 24.220674] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.221209] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.221815] ksys_mmap_pgoff+0x3af/0x500 [ 24.222356] do_syscall_64+0x3f/0x90 [ 24.222898] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.223598] RIP: 0033:0x7f342314cd82 [ 24.224086] 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 [ 24.226371] RSP: 002b:00007ffc64631ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.227360] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f342314cd82 [ 24.228272] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3422586000 [ 24.229173] RBP: 00007f3422586000 R08: 0000000000000009 R09: 0000000000001000 [ 24.230083] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558a07680f70 [ 24.231013] R13: 00007ffc64631b00 R14: 00007ffc64631b30 R15: 00007ffc64631e90 [ 24.231926] [ 24.232249] [ 24.232485] Allocated by task 213: [ 24.232943] kasan_save_stack+0x22/0x50 [ 24.233488] kasan_set_track+0x25/0x30 [ 24.234016] __kasan_slab_alloc+0x59/0x70 [ 24.234604] kmem_cache_alloc+0x16b/0x370 [ 24.235155] vm_area_dup+0x20/0x160 [ 24.235641] __split_vma+0x170/0x950 [ 24.236138] split_vma+0xc6/0x110 [ 24.236616] mprotect_fixup+0x8d2/0xb30 [ 24.237156] do_mprotect_pkey+0x87e/0xd40 [ 24.237713] __x64_sys_mprotect+0x78/0xc0 [ 24.238279] do_syscall_64+0x3f/0x90 [ 24.238813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.239505] [ 24.239734] Freed by task 213: [ 24.240151] kasan_save_stack+0x22/0x50 [ 24.240695] kasan_set_track+0x25/0x30 [ 24.241224] kasan_save_free_info+0x2b/0x50 [ 24.241803] __kasan_slab_free+0x10a/0x190 [ 24.242384] kmem_cache_free+0x10d/0x4d0 [ 24.242929] rcu_core+0x8c8/0x2860 [ 24.243402] __do_softirq+0x1b7/0x7d4 [ 24.243927] [ 24.244159] Last potentially related work creation: [ 24.244797] kasan_save_stack+0x22/0x50 [ 24.245328] __kasan_record_aux_stack+0x8e/0xa0 [ 24.245976] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.246685] remove_vma+0x139/0x170 [ 24.247160] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.247753] do_vmi_munmap+0x1f1/0x2b0 [ 24.248276] __vm_munmap+0x138/0x3a0 [ 24.248775] __x64_sys_munmap+0x59/0x80 [ 24.249303] do_syscall_64+0x3f/0x90 [ 24.249811] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.250516] [ 24.250748] Second to last potentially related work creation: [ 24.251478] kasan_save_stack+0x22/0x50 [ 24.252016] __kasan_record_aux_stack+0x8e/0xa0 [ 24.252630] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.253324] remove_vma+0x139/0x170 [ 24.253807] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.254402] do_vmi_munmap+0x1f1/0x2b0 [ 24.254934] mmap_region+0x1f9/0x2660 [ 24.255460] do_mmap+0x854/0xf00 [ 24.255921] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.256450] ksys_mmap_pgoff+0x3af/0x500 [ 24.256985] do_syscall_64+0x3f/0x90 [ 24.257498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.258185] [ 24.258418] The buggy address belongs to the object at ffff8880096db9f8 [ 24.258418] which belongs to the cache vm_area_struct of size 168 [ 24.260007] The buggy address is located 88 bytes inside of [ 24.260007] freed 168-byte region [ffff8880096db9f8, ffff8880096dbaa0) [ 24.261506] [ 24.261738] The buggy address belongs to the physical page: [ 24.262440] page:00000000870a4589 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880096dbcb0 pfn:0x96db [ 24.263787] memcg:ffff88800eb75001 [ 24.264246] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.264946] page_type: 0xffffffff() [ 24.265429] raw: 0100000000000200 ffff8880087a0c80 ffffea0000252680 dead000000000006 [ 24.266415] raw: ffff8880096dbcb0 000000008011000e 00000001ffffffff ffff88800eb75001 [ 24.267403] page dumped because: kasan: bad access detected [ 24.268109] [ 24.268338] Memory state around the buggy address: [ 24.268956] ffff8880096db900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.269874] ffff8880096db980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 24.270801] >ffff8880096dba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.271710] ^ [ 24.272483] ffff8880096dba80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 24.273400] ffff8880096dbb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.274305] ================================================================== [ 24.275413] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.867583] BUG: Bad rss-counter state mm:00000000e096326e type:MM_FILEPAGES val:33 [ 25.868113] BUG: Bad rss-counter state mm:00000000e096326e type:MM_ANONPAGES val:22 [ 26.278372] BUG: Bad rss-counter state mm:0000000043ebdb3d type:MM_FILEPAGES val:33 [ 26.279301] BUG: Bad rss-counter state mm:0000000043ebdb3d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37715' (ECDSA) to the list of known hosts. 2023/06/21 00:27:54 fuzzer started 2023/06/21 00:27:54 dialing manager at localhost:36067 2023/06/21 00:27:54 checking machine... 2023/06/21 00:27:54 checking revisions... [ 26.991763] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:27:54 testing simple program... [ 27.049755] cgroup: Unknown subsys name 'net' [ 27.099759] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:27:54 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000028 RCX=0000000000000000 RDX=ffff88800e7a3680 RSI=ffffffff844a5040 RDI=0000000000000006 RBP=ffff88800e10b008 RSP=ffff888016f47ce0 R8 =0000000000000006 R9 =0000557a9fa97654 R10=0000557a9e4f6fff R11=0000000000000000 R12=0000000000000004 R13=0000000000000008 R14=0000557a9fa97654 R15=0000557a9e4f6fff RIP=ffffffff814c0880 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2ed3a66900 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=0000557a9fa97654 CR3=000000000fed6000 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=00000000000000000000557a9e455060 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=0000000000000001 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=00007fea1e202338 CR3=000000000d6ca000 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=2033353a37323a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a37323a3030203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000