[ 68.068646] BUG: Bad rss-counter state mm:00000000673f0a29 type:MM_FILEPAGES val:33 Debian GNU/Li[ 68.069916] BUG: Bad rss-counter state mm:00000000673f0a29 type:MM_ANONPAGES val:22 nux 11 syzkaller ttyS0 syzkaller login: [ 68.220900] ================================================================== [ 68.221847] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.222779] Read of size 8 at addr ffff88801833a6b0 by task sshd/219 [ 68.223562] [ 68.223783] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 68.224954] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.225956] Call Trace: [ 68.226283] [ 68.226579] dump_stack_lvl+0x91/0xf0 [ 68.227080] print_report+0xcc/0x620 [ 68.227569] ? __virt_addr_valid+0x102/0x340 [ 68.228116] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.228733] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.229353] kasan_report+0xbe/0xf0 [ 68.229837] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.230459] vma_interval_tree_remove+0xc75/0xec0 [ 68.231059] vma_prepare+0xc54/0x11a0 [ 68.231536] __split_vma+0x5af/0x950 [ 68.232004] ? __pfx___split_vma+0x10/0x10 [ 68.232534] ? find_held_lock+0x2c/0x110 [ 68.233055] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.233635] ? lock_is_held_type+0x9f/0x120 [ 68.234164] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.234763] ? mtree_range_walk+0x632/0x900 [ 68.235309] ? mas_walk+0x5c7/0x7c0 [ 68.235783] do_vmi_munmap+0x1f1/0x2b0 [ 68.236274] mmap_region+0x1f9/0x2660 [ 68.236754] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.237266] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.237982] ? __pfx_lock_acquire+0x10/0x10 [ 68.238513] ? __pfx_mmap_region+0x10/0x10 [ 68.239040] ? security_mmap_addr+0x7d/0xa0 [ 68.239566] ? get_unmapped_area+0x1f5/0x3f0 [ 68.240112] do_mmap+0x854/0xf00 [ 68.240548] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.241042] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.241607] ksys_mmap_pgoff+0x3af/0x500 [ 68.242117] do_syscall_64+0x3f/0x90 [ 68.242597] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.243236] RIP: 0033:0x7fa9f8e73d82 [ 68.243689] 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 [ 68.245809] RSP: 002b:00007fff1bb7ed48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.246710] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa9f8e73d82 [ 68.247554] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa9f82ad000 [ 68.248391] RBP: 00007fa9f82ad000 R08: 0000000000000009 R09: 0000000000001000 [ 68.249226] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f2e7105ec0 [ 68.250078] R13: 00007fff1bb7ed60 R14: 00007fff1bb7ed90 R15: 00007fff1bb7f0f0 [ 68.250935] [ 68.251222] [ 68.251437] Allocated by task 212: [ 68.251861] kasan_save_stack+0x22/0x50 [ 68.252367] kasan_set_track+0x25/0x30 [ 68.252862] __kasan_slab_alloc+0x59/0x70 [ 68.253389] kmem_cache_alloc+0x16b/0x370 [ 68.253927] vm_area_dup+0x20/0x160 [ 68.254378] __split_vma+0x170/0x950 [ 68.254846] split_vma+0xc6/0x110 [ 68.255282] mprotect_fixup+0x8d2/0xb30 [ 68.255785] do_mprotect_pkey+0x87e/0xd40 [ 68.256302] __x64_sys_mprotect+0x78/0xc0 [ 68.256822] do_syscall_64+0x3f/0x90 [ 68.257300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.257946] [ 68.258163] Freed by task 212: [ 68.258559] kasan_save_stack+0x22/0x50 [ 68.259061] kasan_set_track+0x25/0x30 [ 68.259553] kasan_save_free_info+0x2b/0x50 [ 68.260089] __kasan_slab_free+0x10a/0x190 [ 68.260627] kmem_cache_free+0x10d/0x4d0 [ 68.261134] rcu_core+0x8c8/0x2860 [ 68.261600] __do_softirq+0x1b7/0x7d4 [ 68.262079] [ 68.262296] Last potentially related work creation: [ 68.262872] kasan_save_stack+0x22/0x50 [ 68.263372] __kasan_record_aux_stack+0x8e/0xa0 [ 68.263943] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.264582] remove_vma+0x139/0x170 [ 68.265027] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.265595] do_vmi_munmap+0x1f1/0x2b0 [ 68.266096] __vm_munmap+0x138/0x3a0 [ 68.266567] __x64_sys_munmap+0x59/0x80 [ 68.267070] do_syscall_64+0x3f/0x90 [ 68.267544] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.268202] [ 68.268419] The buggy address belongs to the object at ffff88801833a658 [ 68.268419] which belongs to the cache vm_area_struct of size 168 [ 68.269926] The buggy address is located 88 bytes inside of [ 68.269926] freed 168-byte region [ffff88801833a658, ffff88801833a700) [ 68.271329] [ 68.271545] The buggy address belongs to the physical page: [ 68.272203] page:00000000d52f82ae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1833a [ 68.273297] memcg:ffff88800e6af401 [ 68.273740] flags: 0x100000000000200(slab|node=0|zone=1) [ 68.274388] page_type: 0xffffffff() [ 68.274843] raw: 0100000000000200 ffff88800879fc80 ffffea000039a040 dead000000000006 [ 68.275762] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6af401 [ 68.276664] page dumped because: kasan: bad access detected [ 68.277321] [ 68.277536] Memory state around the buggy address: [ 68.278121] ffff88801833a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.278979] ffff88801833a600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 68.279833] >ffff88801833a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.280684] ^ [ 68.281271] ffff88801833a700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 68.282154] ffff88801833a780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 68.283001] ================================================================== [ 68.284203] Disabling lock debugging due to kernel taint [ 70.182229] BUG: Bad rss-counter state mm:00000000adc3967b type:MM_FILEPAGES val:33 [ 70.183055] BUG: Bad rss-counter state mm:00000000adc3967b type:MM_ANONPAGES val:22 [ 70.670239] BUG: Bad rss-counter state mm:00000000736c40de type:MM_FILEPAGES val:33 [ 70.671455] BUG: Bad rss-counter state mm:00000000736c40de type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4645' (ECDSA) to the list of known hosts. 2023/06/19 18:47:18 fuzzer started 2023/06/19 18:47:18 dialing manager at localhost:44161 2023/06/19 18:47:18 checking machine... 2023/06/19 18:47:18 checking revisions... [ 71.384640] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:47:18 testing simple program... [ 71.422748] cgroup: Unknown subsys name 'net' [ 71.469381] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:46:41 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff863b440e RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88801a1d7570 RSP=ffff88801a1d74a8 R8 =ffffffff863b4412 R9 =ffff88801a1d7558 R10=0000000000038001 R11=000000000008b00b R12=ffff88801a1d7578 R13=ffff88801a1d7560 R14=ffff88801a1d7b78 R15=ffff88801a1d7518 RIP=ffffffff81130bc1 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 00007f7c1a997900 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=00007f7c1af4c650 CR3=0000000009d50000 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=0000000000010b7e RBX=0000000000000002 RCX=ffffffff813ad6cf RDX=000000000000000d RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffff88806cf09af0 RSP=ffff88806cf09a18 R8 =ffffffff860d68c0 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000010b7e R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff8112fc12 RFL=00000212 [----A--] 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=00007f8a61d3d000 CR3=000000000d628000 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=d385e5e26a273b923846aa159d5d1e23 XMM02=2c67c8bc2e329bc30000000000121690 XMM03=fb795ef6d65770560000000000128810 XMM04=36a833bd51435b3f00000000000ae988 XMM05=b9a6cb2338e359170000000000139838 XMM06=806171799158d9670000000000138568 XMM07=e042d86d42eb936e0000000000128ae8 XMM08=871e1b4c2969b44e00000000001216f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000