syzkaller login: [ 60.362350] BUG: Bad rss-counter state mm:0000000083549a9b type:MM_FILEPAGES val:33 [ 60.363541] BUG: Bad rss-counter state mm:0000000083549a9b type:MM_ANONPAGES val:22 [ 60.399265] ================================================================== [ 60.400405] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.401512] Read of size 8 at addr ffff88800d60b4e0 by task sshd/221 [ 60.402419] [ 60.402678] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.403688] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.404826] Call Trace: [ 60.405199] [ 60.405538] dump_stack_lvl+0x91/0xf0 [ 60.406164] print_report+0xcc/0x620 [ 60.406710] ? __virt_addr_valid+0x102/0x340 [ 60.407257] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.407865] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.408492] kasan_report+0xbe/0xf0 [ 60.408978] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.409604] vma_interval_tree_remove+0xc75/0xec0 [ 60.410214] vma_prepare+0xc54/0x11a0 [ 60.410690] __split_vma+0x5af/0x950 [ 60.411155] ? __pfx___split_vma+0x10/0x10 [ 60.411680] ? find_held_lock+0x2c/0x110 [ 60.412197] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.412764] ? lock_is_held_type+0x9f/0x120 [ 60.413306] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.413919] ? mtree_range_walk+0x632/0x900 [ 60.414467] ? mas_walk+0x5c7/0x7c0 [ 60.414941] do_vmi_munmap+0x1f1/0x2b0 [ 60.415430] mmap_region+0x1f9/0x2660 [ 60.415907] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.416414] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.417128] ? __pfx_lock_acquire+0x10/0x10 [ 60.417654] ? __pfx_mmap_region+0x10/0x10 [ 60.418207] ? security_mmap_addr+0x7d/0xa0 [ 60.418738] ? get_unmapped_area+0x1f5/0x3f0 [ 60.419286] do_mmap+0x854/0xf00 [ 60.419723] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.420220] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.420777] ksys_mmap_pgoff+0x3af/0x500 [ 60.421283] do_syscall_64+0x3f/0x90 [ 60.421756] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.422409] RIP: 0033:0x7fe5f3fa4d82 [ 60.422862] 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 [ 60.424985] RSP: 002b:00007ffe20e8fbf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.425906] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe5f3fa4d82 [ 60.426759] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe5f33de000 [ 60.427597] RBP: 00007fe5f33de000 R08: 0000000000000009 R09: 0000000000001000 [ 60.428586] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560cd2289b20 [ 60.429430] R13: 00007ffe20e8fc10 R14: 00007ffe20e8fc40 R15: 00007ffe20e8ffa0 [ 60.430312] [ 60.430605] [ 60.430819] Allocated by task 214: [ 60.431245] kasan_save_stack+0x22/0x50 [ 60.431756] kasan_set_track+0x25/0x30 [ 60.432249] __kasan_slab_alloc+0x59/0x70 [ 60.432790] kmem_cache_alloc+0x16b/0x370 [ 60.433348] vm_area_dup+0x20/0x160 [ 60.433850] __split_vma+0x170/0x950 [ 60.434322] split_vma+0xc6/0x110 [ 60.434767] mprotect_fixup+0x8d2/0xb30 [ 60.435287] do_mprotect_pkey+0x87e/0xd40 [ 60.435829] __x64_sys_mprotect+0x78/0xc0 [ 60.436361] do_syscall_64+0x3f/0x90 [ 60.436836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.437475] [ 60.437687] Freed by task 214: [ 60.438100] kasan_save_stack+0x22/0x50 [ 60.438611] kasan_set_track+0x25/0x30 [ 60.439112] kasan_save_free_info+0x2b/0x50 [ 60.439637] __kasan_slab_free+0x10a/0x190 [ 60.440168] kmem_cache_free+0x10d/0x4d0 [ 60.440678] rcu_core+0x8c8/0x2860 [ 60.441122] __do_softirq+0x1b7/0x7d4 [ 60.441620] [ 60.441853] Last potentially related work creation: [ 60.442440] kasan_save_stack+0x22/0x50 [ 60.442945] __kasan_record_aux_stack+0x8e/0xa0 [ 60.443514] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.444160] remove_vma+0x139/0x170 [ 60.444620] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.445193] do_vmi_munmap+0x1f1/0x2b0 [ 60.445688] __vm_munmap+0x138/0x3a0 [ 60.446176] __x64_sys_munmap+0x59/0x80 [ 60.446672] do_syscall_64+0x3f/0x90 [ 60.447145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.447790] [ 60.448014] Second to last potentially related work creation: [ 60.448701] kasan_save_stack+0x22/0x50 [ 60.449204] __kasan_record_aux_stack+0x8e/0xa0 [ 60.449795] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.450437] remove_vma+0x139/0x170 [ 60.450899] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.451475] do_vmi_munmap+0x1f1/0x2b0 [ 60.451998] mmap_region+0x1f9/0x2660 [ 60.452478] do_mmap+0x854/0xf00 [ 60.452914] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.453420] ksys_mmap_pgoff+0x7d/0x500 [ 60.453930] do_syscall_64+0x3f/0x90 [ 60.454412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.455059] [ 60.455276] The buggy address belongs to the object at ffff88800d60b488 [ 60.455276] which belongs to the cache vm_area_struct of size 168 [ 60.456767] The buggy address is located 88 bytes inside of [ 60.456767] freed 168-byte region [ffff88800d60b488, ffff88800d60b530) [ 60.458251] [ 60.458467] The buggy address belongs to the physical page: [ 60.459177] page:00000000a8ed3a4b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd60b [ 60.460313] memcg:ffff888009790001 [ 60.460759] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.461435] page_type: 0xffffffff() [ 60.461908] raw: 0100000000000200 ffff8880087a0c80 ffffea00003aed00 dead000000000004 [ 60.462827] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009790001 [ 60.463732] page dumped because: kasan: bad access detected [ 60.464403] [ 60.464633] Memory state around the buggy address: [ 60.465234] ffff88800d60b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 60.466107] ffff88800d60b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 60.466963] >ffff88800d60b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.467829] ^ [ 60.468619] ffff88800d60b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 60.469475] ffff88800d60b580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.470434] ================================================================== [ 60.471365] Disabling lock debugging due to kernel taint [ 62.397862] BUG: Bad rss-counter state mm:000000003b2ed26a type:MM_FILEPAGES val:33 [ 62.399099] BUG: Bad rss-counter state mm:000000003b2ed26a type:MM_ANONPAGES val:22 [ 62.803879] BUG: Bad rss-counter state mm:0000000062ef217f type:MM_FILEPAGES val:33 [ 62.804865] BUG: Bad rss-counter state mm:0000000062ef217f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61279' (ECDSA) to the list of known hosts. 2023/06/21 05:18:41 fuzzer started 2023/06/21 05:18:41 dialing manager at localhost:36067 2023/06/21 05:18:41 checking machine... 2023/06/21 05:18:41 checking revisions... [ 63.446587] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:18:41 testing simple program... [ 63.494691] cgroup: Unknown subsys name 'net' [ 63.544143] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:18:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff817f6a65 RDX=ffff888015830000 RSI=0000000000000001 RDI=0000000000000005 RBP=ffffffff87b7de20 RSP=ffff888018267968 R8 =0000000000000003 R9 =0000000000000003 R10=0000000000000001 R11=0000000000000000 R12=0000000000012cc0 R13=0000000000000000 R14=0000000000000000 R15=00000000ffffffff RIP=ffffffff814c03d8 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 00007f8df4deb900 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=00007f8df53a2618 CR3=000000000ea96000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=00007ffe6b454b28 CR3=00000000199f4000 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=38313a3530203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383734 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000