syzkaller login: [ 35.579755] BUG: Bad rss-counter state mm:00000000e5f985b7 type:MM_FILEPAGES val:33 [ 35.580789] BUG: Bad rss-counter state mm:00000000e5f985b7 type:MM_ANONPAGES val:22 [ 35.742120] ================================================================== [ 35.743197] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.744302] Read of size 8 at addr ffff88800e066310 by task sshd/219 [ 35.745314] [ 35.745535] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.746411] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.747418] Call Trace: [ 35.747745] [ 35.748031] dump_stack_lvl+0x91/0xf0 [ 35.748537] print_report+0xcc/0x620 [ 35.749056] ? __virt_addr_valid+0x102/0x340 [ 35.749613] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.750243] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.750871] kasan_report+0xbe/0xf0 [ 35.751352] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.751971] vma_interval_tree_remove+0xc75/0xec0 [ 35.752596] vma_prepare+0xc54/0x11a0 [ 35.753080] __split_vma+0x5af/0x950 [ 35.753551] ? __pfx___split_vma+0x10/0x10 [ 35.754074] ? find_held_lock+0x2c/0x110 [ 35.754590] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.755150] ? lock_is_held_type+0x9f/0x120 [ 35.755693] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.756297] ? mtree_range_walk+0x632/0x900 [ 35.756874] ? mas_walk+0x5c7/0x7c0 [ 35.757348] do_vmi_munmap+0x1f1/0x2b0 [ 35.757838] mmap_region+0x1f9/0x2660 [ 35.758317] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.758839] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.759554] ? __pfx_lock_acquire+0x10/0x10 [ 35.760087] ? __pfx_mmap_region+0x10/0x10 [ 35.760639] ? security_mmap_addr+0x7d/0xa0 [ 35.761171] ? get_unmapped_area+0x1f5/0x3f0 [ 35.761723] do_mmap+0x854/0xf00 [ 35.762158] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.762656] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.763228] ksys_mmap_pgoff+0x3af/0x500 [ 35.763742] do_syscall_64+0x3f/0x90 [ 35.764219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.764896] RIP: 0033:0x7f1b88f96d82 [ 35.765351] 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 [ 35.767514] RSP: 002b:00007ffd29cda4f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.768412] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1b88f96d82 [ 35.769294] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1b883d0000 [ 35.770151] RBP: 00007f1b883d0000 R08: 0000000000000009 R09: 0000000000001000 [ 35.771012] R10: 0000000000000812 R11: 0000000000000206 R12: 00005570353c0ec0 [ 35.771884] R13: 00007ffd29cda510 R14: 00007ffd29cda540 R15: 00007ffd29cda8a0 [ 35.772832] [ 35.773140] [ 35.773355] Allocated by task 212: [ 35.773795] kasan_save_stack+0x22/0x50 [ 35.774321] kasan_set_track+0x25/0x30 [ 35.774827] __kasan_slab_alloc+0x59/0x70 [ 35.775360] kmem_cache_alloc+0x16b/0x370 [ 35.775874] vm_area_dup+0x20/0x160 [ 35.776328] __split_vma+0x170/0x950 [ 35.776817] split_vma+0xc6/0x110 [ 35.777259] mprotect_fixup+0x8d2/0xb30 [ 35.777761] do_mprotect_pkey+0x87e/0xd40 [ 35.778280] __x64_sys_mprotect+0x78/0xc0 [ 35.778795] do_syscall_64+0x3f/0x90 [ 35.779271] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.779908] [ 35.780125] Freed by task 212: [ 35.780524] kasan_save_stack+0x22/0x50 [ 35.781042] kasan_set_track+0x25/0x30 [ 35.781534] kasan_save_free_info+0x2b/0x50 [ 35.782067] __kasan_slab_free+0x10a/0x190 [ 35.782598] kmem_cache_free+0x10d/0x4d0 [ 35.783101] rcu_core+0x8c8/0x2860 [ 35.783545] __do_softirq+0x1b7/0x7d4 [ 35.784028] [ 35.784240] Last potentially related work creation: [ 35.784848] kasan_save_stack+0x22/0x50 [ 35.785352] __kasan_record_aux_stack+0x8e/0xa0 [ 35.785931] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.786649] remove_vma+0x139/0x170 [ 35.787110] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.787673] do_vmi_munmap+0x1f1/0x2b0 [ 35.788177] __vm_munmap+0x138/0x3a0 [ 35.788659] __x64_sys_munmap+0x59/0x80 [ 35.789152] do_syscall_64+0x3f/0x90 [ 35.789627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.790267] [ 35.790481] Second to last potentially related work creation: [ 35.791164] kasan_save_stack+0x22/0x50 [ 35.791670] __kasan_record_aux_stack+0x8e/0xa0 [ 35.792239] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.792878] remove_vma+0x139/0x170 [ 35.793329] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.793879] do_vmi_munmap+0x1f1/0x2b0 [ 35.794362] mmap_region+0x1f9/0x2660 [ 35.794838] do_mmap+0x854/0xf00 [ 35.795268] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.795751] ksys_mmap_pgoff+0x7d/0x500 [ 35.796236] do_syscall_64+0x3f/0x90 [ 35.796723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.797363] [ 35.797577] The buggy address belongs to the object at ffff88800e0662b8 [ 35.797577] which belongs to the cache vm_area_struct of size 168 [ 35.799026] The buggy address is located 88 bytes inside of [ 35.799026] freed 168-byte region [ffff88800e0662b8, ffff88800e066360) [ 35.800419] [ 35.800641] The buggy address belongs to the physical page: [ 35.801303] page:00000000ac5c0b69 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe066 [ 35.802385] memcg:ffff88800e02f501 [ 35.802813] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.803457] page_type: 0xffffffff() [ 35.803906] raw: 0100000000000200 ffff8880087a0c80 ffffea000038e240 dead000000000002 [ 35.804823] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e02f501 [ 35.805723] page dumped because: kasan: bad access detected [ 35.806378] [ 35.806588] Memory state around the buggy address: [ 35.807165] ffff88800e066200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 35.808020] ffff88800e066280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 35.808893] >ffff88800e066300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.809742] ^ [ 35.810202] ffff88800e066380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.811050] ffff88800e066400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 35.811896] ================================================================== [ 35.812903] Disabling lock debugging due to kernel taint [ 37.855885] BUG: Bad rss-counter state mm:00000000f31f6c3f type:MM_FILEPAGES val:33 [ 37.856652] BUG: Bad rss-counter state mm:00000000f31f6c3f type:MM_ANONPAGES val:22 [ 38.264385] BUG: Bad rss-counter state mm:00000000ec9b50d7 type:MM_FILEPAGES val:33 [ 38.265310] BUG: Bad rss-counter state mm:00000000ec9b50d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42961' (ECDSA) to the list of known hosts. 2023/06/21 02:35:41 fuzzer started 2023/06/21 02:35:41 dialing manager at localhost:36067 2023/06/21 02:35:41 checking machine... 2023/06/21 02:35:41 checking revisions... [ 38.926188] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:35:41 testing simple program... [ 38.978405] cgroup: Unknown subsys name 'net' [ 39.027575] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:35:40 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110033cbf24 RSI=ffffffff8363b743 RDI=ffff888019e5f990 RBP=ffff888019e5f960 RSP=ffff888019e5f8c0 R8 =0000000000000001 R9 =ffff888019e5f908 R10=0000000000038001 R11=000000000008a95e R12=ffff888019e5f990 R13=0000000000000000 R14=ffff8880100a3680 R15=0000000000092c40 RIP=ffffffff813ad47e RFL=00000282 [--S----] 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 00007f3a246fe900 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=00007fff64356000 CR3=000000000e858000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=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=00007fc573811c90 CR3=00000000139a2000 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=63b5de991caa288ce6439e87fe30ef93 XMM02=2c67c8bc2e329bc3000000000011b638 XMM03=fb795ef6d65770560000000000122400 XMM04=98bb81585a9aa54800000000000ae988 XMM05=dfcdbad4f1609c370000000000133318 XMM06=e2854049e2c526fa00000000001324f0 XMM07=e042d86d42eb936e00000000001226d8 XMM08=af8abd0ecbb63025000000000011b698 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000