syzkaller login: [ 39.076684] BUG: Bad rss-counter state mm:00000000dee182b8 type:MM_FILEPAGES val:33 [ 39.077921] BUG: Bad rss-counter state mm:00000000dee182b8 type:MM_ANONPAGES val:22 [ 39.113161] ================================================================== [ 39.113886] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.114701] Read of size 8 at addr ffff88800ddd0968 by task sshd/219 [ 39.115310] [ 39.115478] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.116117] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.116910] Call Trace: [ 39.117142] [ 39.117349] dump_stack_lvl+0x91/0xf0 [ 39.117707] print_report+0xcc/0x620 [ 39.118057] ? __virt_addr_valid+0x102/0x340 [ 39.118453] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.118894] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.119349] kasan_report+0xbe/0xf0 [ 39.119693] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.120142] vma_interval_tree_remove+0xc75/0xec0 [ 39.120573] vma_prepare+0xc54/0x11a0 [ 39.120919] __split_vma+0x5af/0x950 [ 39.121258] ? __pfx___split_vma+0x10/0x10 [ 39.121636] ? find_held_lock+0x2c/0x110 [ 39.122012] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.122420] ? lock_is_held_type+0x9f/0x120 [ 39.122807] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.123241] ? mtree_range_walk+0x632/0x900 [ 39.123647] ? mas_walk+0x5c7/0x7c0 [ 39.123988] do_vmi_munmap+0x1f1/0x2b0 [ 39.124338] mmap_region+0x1f9/0x2660 [ 39.124682] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.125043] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.125555] ? __pfx_lock_acquire+0x10/0x10 [ 39.125934] ? __pfx_mmap_region+0x10/0x10 [ 39.126312] ? security_mmap_addr+0x7d/0xa0 [ 39.126691] ? get_unmapped_area+0x1f5/0x3f0 [ 39.127078] do_mmap+0x854/0xf00 [ 39.127406] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.127762] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.128156] ksys_mmap_pgoff+0x3af/0x500 [ 39.128513] do_syscall_64+0x3f/0x90 [ 39.128848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.129304] RIP: 0033:0x7fba19566d82 [ 39.129627] 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 [ 39.131135] RSP: 002b:00007ffc88474498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.131788] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fba19566d82 [ 39.132392] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fba189a0000 [ 39.132996] RBP: 00007fba189a0000 R08: 0000000000000009 R09: 0000000000001000 [ 39.133595] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c88dc16f70 [ 39.134195] R13: 00007ffc884744b0 R14: 00007ffc884744e0 R15: 00007ffc88474840 [ 39.134806] [ 39.135012] [ 39.135165] Allocated by task 212: [ 39.135481] kasan_save_stack+0x22/0x50 [ 39.135838] kasan_set_track+0x25/0x30 [ 39.136182] __kasan_slab_alloc+0x59/0x70 [ 39.136553] kmem_cache_alloc+0x16b/0x370 [ 39.136914] vm_area_dup+0x20/0x160 [ 39.137234] __split_vma+0x170/0x950 [ 39.137560] split_vma+0xc6/0x110 [ 39.137872] mprotect_fixup+0x8d2/0xb30 [ 39.138222] do_mprotect_pkey+0x87e/0xd40 [ 39.138588] __x64_sys_mprotect+0x78/0xc0 [ 39.138951] do_syscall_64+0x3f/0x90 [ 39.139285] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.139738] [ 39.139887] Freed by task 212: [ 39.140161] kasan_save_stack+0x22/0x50 [ 39.140516] kasan_set_track+0x25/0x30 [ 39.140860] kasan_save_free_info+0x2b/0x50 [ 39.141234] __kasan_slab_free+0x10a/0x190 [ 39.141614] kmem_cache_free+0x10d/0x4d0 [ 39.141973] rcu_core+0x8c8/0x2860 [ 39.142289] __do_softirq+0x1b7/0x7d4 [ 39.142623] [ 39.142775] Last potentially related work creation: [ 39.143186] kasan_save_stack+0x22/0x50 [ 39.143548] __kasan_record_aux_stack+0x8e/0xa0 [ 39.143955] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.144407] remove_vma+0x139/0x170 [ 39.144723] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.145112] do_vmi_munmap+0x1f1/0x2b0 [ 39.145456] __vm_munmap+0x138/0x3a0 [ 39.145785] __x64_sys_munmap+0x59/0x80 [ 39.146136] do_syscall_64+0x3f/0x90 [ 39.146467] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.146919] [ 39.147071] Second to last potentially related work creation: [ 39.147571] kasan_save_stack+0x22/0x50 [ 39.147923] __kasan_record_aux_stack+0x8e/0xa0 [ 39.148330] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.148786] remove_vma+0x139/0x170 [ 39.149102] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.149497] do_vmi_munmap+0x1f1/0x2b0 [ 39.149845] mmap_region+0x1f9/0x2660 [ 39.150179] do_mmap+0x854/0xf00 [ 39.150481] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.150854] ksys_mmap_pgoff+0x7d/0x500 [ 39.151205] do_syscall_64+0x3f/0x90 [ 39.151545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.151994] [ 39.152143] The buggy address belongs to the object at ffff88800ddd0910 [ 39.152143] which belongs to the cache vm_area_struct of size 168 [ 39.153183] The buggy address is located 88 bytes inside of [ 39.153183] freed 168-byte region [ffff88800ddd0910, ffff88800ddd09b8) [ 39.154166] [ 39.154316] The buggy address belongs to the physical page: [ 39.154779] page:0000000089cd7f0a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xddd0 [ 39.155546] memcg:ffff88800cb56e01 [ 39.155849] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.156340] page_type: 0xffffffff() [ 39.156655] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 39.157298] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb56e01 [ 39.157936] page dumped because: kasan: bad access detected [ 39.158405] [ 39.158555] Memory state around the buggy address: [ 39.158965] ffff88800ddd0800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.159587] ffff88800ddd0880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.160190] >ffff88800ddd0900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.160789] ^ [ 39.161338] ffff88800ddd0980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 39.161939] ffff88800ddd0a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.162531] ================================================================== [ 39.163279] Disabling lock debugging due to kernel taint [ 41.027697] BUG: Bad rss-counter state mm:000000007bbb8f32 type:MM_FILEPAGES val:33 [ 41.028865] BUG: Bad rss-counter state mm:000000007bbb8f32 type:MM_ANONPAGES val:22 [ 41.552765] BUG: Bad rss-counter state mm:000000002f6db1e3 type:MM_FILEPAGES val:33 [ 41.553747] BUG: Bad rss-counter state mm:000000002f6db1e3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29019' (ECDSA) to the list of known hosts. 2023/06/20 05:52:57 fuzzer started 2023/06/20 05:52:58 dialing manager at localhost:44161 2023/06/20 05:52:58 checking machine... 2023/06/20 05:52:58 checking revisions... [ 42.290199] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:52:58 testing simple program... [ 42.345538] cgroup: Unknown subsys name 'net' [ 42.442686] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:52:57 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff83644344 RCX=0000000000000001 RDX=1ffff11001ac7ea8 RSI=ffff88800d63fde0 RDI=ffffffff83644344 RBP=ffff88800d63f540 RSP=ffff88800d63f4b8 R8 =0000000000000001 R9 =ffff88800d63f528 R10=0000000000038001 R11=000000000008ab54 R12=ffff88800d63f5b0 R13=0000000000000000 R14=ffff888014168000 R15=1ffff11001ac7f1d RIP=ffffffff811fc7a0 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 00007f2a8db7a900 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=00007f2a8cfcb0a0 CR3=0000000009462000 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=c3a29e87991014b22945e424a36872c3 XMM02=000000000011ce50d59e07bde36eea69 XMM03=000000000011cf78ec2efd57dc4c00df XMM04=42539607d08cd5d700000000000ae988 XMM05=fed63d8658d53a3b0000000000135a90 XMM06=4921e9686be53fdc00000000001344c0 XMM07=fb795ef6d65770560000000000123918 XMM08=2c67c8bc2e329bc3000000000011cf78 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000003de00 RBX=0000000000000200 RCX=ffffffff81534376 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff88800cb97c30 RSP=ffff88800cb97b70 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800844f780 R13=0000000000000000 R14=ffff88806cf3de20 R15=ffff88806cf3de00 RIP=ffffffff81806df5 RFL=00000002 [-------] 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 00007f26133a1900 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=00007ffc38eb6000 CR3=000000000d830000 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