[ 31.894912] BUG: Bad rss-counter state mm:00000000227373ff type:MM_FILEPAGES val:33 [ 31.896246] BUG: Bad rss-counter state mm:00000000227373ff type:MM_ANONPAGES val:22 [ 31.937764] ================================================================== [ 31.938884] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.939993] Read of size 8 at addr ffff88800d428310 by task sshd/219 [ 31.940917] [ 31.941153] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.942164] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.943234] Call Trace: [ 31.943604] [ 31.943905] dump_stack_lvl+0x91/0xf0 [ 31.944479] print_report+0xcc/0x620 [ 31.944969] ? __virt_addr_valid+0x102/0x340 [ 31.945629] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.946313] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.946934] kasan_report+0xbe/0xf0 [ 31.947418] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.948044] vma_interval_tree_remove+0xc75/0xec0 [ 31.948649] vma_prepare+0xc54/0x11a0 [ 31.949159] __split_vma+0x5af/0x950 [ 31.949631] ? __pfx___split_vma+0x10/0x10 [ 31.950162] ? find_held_lock+0x2c/0x110 [ 31.950686] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.951260] ? lock_is_held_type+0x9f/0x120 [ 31.951804] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.952410] ? mtree_range_walk+0x632/0x900 [ 31.952964] ? mas_walk+0x5c7/0x7c0 [ 31.953461] do_vmi_munmap+0x1f1/0x2b0 [ 31.953966] mmap_region+0x1f9/0x2660 [ 31.954452] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.954966] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.955718] ? __pfx_lock_acquire+0x10/0x10 [ 31.956248] ? __pfx_mmap_region+0x10/0x10 [ 31.956780] ? security_mmap_addr+0x7d/0xa0 [ 31.957336] ? get_unmapped_area+0x1f5/0x3f0 [ 31.957887] do_mmap+0x854/0xf00 [ 31.958331] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.958833] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.959403] ksys_mmap_pgoff+0x3af/0x500 [ 31.959921] do_syscall_64+0x3f/0x90 [ 31.960404] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.961060] RIP: 0033:0x7fd07760ed82 [ 31.961526] 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 [ 31.963659] RSP: 002b:00007fff086180f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.964569] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd07760ed82 [ 31.965504] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd076a48000 [ 31.966364] RBP: 00007fd076a48000 R08: 0000000000000009 R09: 0000000000001000 [ 31.967263] R10: 0000000000000812 R11: 0000000000000206 R12: 00005634e9664f70 [ 31.968112] R13: 00007fff08618110 R14: 00007fff08618140 R15: 00007fff086184a0 [ 31.968975] [ 31.969286] [ 31.969503] Allocated by task 212: [ 31.969930] kasan_save_stack+0x22/0x50 [ 31.970438] kasan_set_track+0x25/0x30 [ 31.970936] __kasan_slab_alloc+0x59/0x70 [ 31.971462] kmem_cache_alloc+0x16b/0x370 [ 31.971977] vm_area_dup+0x20/0x160 [ 31.972433] __split_vma+0x170/0x950 [ 31.972901] split_vma+0xc6/0x110 [ 31.973349] mprotect_fixup+0x8d2/0xb30 [ 31.973851] do_mprotect_pkey+0x87e/0xd40 [ 31.974377] __x64_sys_mprotect+0x78/0xc0 [ 31.974904] do_syscall_64+0x3f/0x90 [ 31.975376] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.976021] [ 31.976240] Freed by task 210: [ 31.976633] kasan_save_stack+0x22/0x50 [ 31.977159] kasan_set_track+0x25/0x30 [ 31.977660] kasan_save_free_info+0x2b/0x50 [ 31.978193] __kasan_slab_free+0x10a/0x190 [ 31.978782] kmem_cache_free+0x10d/0x4d0 [ 31.979298] rcu_core+0x8c8/0x2860 [ 31.979745] __do_softirq+0x1b7/0x7d4 [ 31.980222] [ 31.980448] Last potentially related work creation: [ 31.981036] kasan_save_stack+0x22/0x50 [ 31.981563] __kasan_record_aux_stack+0x8e/0xa0 [ 31.982148] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.982783] remove_vma+0x139/0x170 [ 31.983276] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.983840] do_vmi_munmap+0x1f1/0x2b0 [ 31.984325] __vm_munmap+0x138/0x3a0 [ 31.984795] __x64_sys_munmap+0x59/0x80 [ 31.985312] do_syscall_64+0x3f/0x90 [ 31.985797] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.986442] [ 31.986693] The buggy address belongs to the object at ffff88800d4282b8 [ 31.986693] which belongs to the cache vm_area_struct of size 168 [ 31.988228] The buggy address is located 88 bytes inside of [ 31.988228] freed 168-byte region [ffff88800d4282b8, ffff88800d428360) [ 31.989651] [ 31.989867] The buggy address belongs to the physical page: [ 31.990528] page:000000003632d50d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd428 [ 31.991614] memcg:ffff88800e1baa01 [ 31.992045] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.992696] page_type: 0xffffffff() [ 31.993154] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 31.994076] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1baa01 [ 31.994990] page dumped because: kasan: bad access detected [ 31.995658] [ 31.995875] Memory state around the buggy address: [ 31.996459] ffff88800d428200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.997342] ffff88800d428280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.998204] >ffff88800d428300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.999066] ^ [ 31.999535] ffff88800d428380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.000405] ffff88800d428400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.001267] ================================================================== [ 32.002307] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.984434] BUG: Bad rss-counter state mm:00000000c5e2c6f6 type:MM_FILEPAGES val:33 [ 33.985667] BUG: Bad rss-counter state mm:00000000c5e2c6f6 type:MM_ANONPAGES val:22 [ 34.451594] BUG: Bad rss-counter state mm:0000000062819121 type:MM_FILEPAGES val:33 [ 34.452656] BUG: Bad rss-counter state mm:0000000062819121 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31257' (ECDSA) to the list of known hosts. 2023/06/19 12:08:35 fuzzer started 2023/06/19 12:08:35 dialing manager at localhost:44161 2023/06/19 12:08:35 checking machine... 2023/06/19 12:08:35 checking revisions... [ 35.171292] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:08:35 testing simple program... [ 35.230821] cgroup: Unknown subsys name 'net' [ 35.286066] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:08:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880094bfc40 RCX=0000000000000001 RDX=1ffff11001297f12 RSI=ffff8880094bfc10 RDI=ffff8880094bf890 RBP=ffff8880094b8000 RSP=ffff8880094bf810 R8 =0000000000000001 R9 =ffff8880094bf8c0 R10=0000000000038001 R11=000000000000fc0f R12=ffff8880094bf8e0 R13=ffff8880094bf8c8 R14=ffff8880094bfc10 R15=ffff8880094bf880 RIP=ffffffff81131ca6 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 00007fbdeb34c900 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=00007fbdeb901650 CR3=0000000016a52000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff814c84ed RDX=ffff8880102cb680 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88806cf09a00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652a88 R15=ffff88800df05d80 RIP=ffffffff814c0388 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 00007f84c7606900 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=00007f84c69f52e0 CR3=000000000c5a8000 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=a3b69ad108ab0099c847d46fe40afdc4 XMM02=ec2efd57dc4c00df0000000000120d90 XMM03=b5f872f32c4cfeb50000000000120e60 XMM04=e46032ac3dceecf400000000000ae988 XMM05=7265c6787b24d72e0000000000135658 XMM06=806171799158d96700000000001340d8 XMM07=fb795ef6d65770560000000000124960 XMM08=2c67c8bc2e329bc30000000000120e00 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000