syzkaller login: [ 30.152480] BUG: Bad rss-counter state mm:000000001d6474d8 type:MM_FILEPAGES val:33 [ 30.154415] BUG: Bad rss-counter state mm:000000001d6474d8 type:MM_ANONPAGES val:22 [ 30.317414] ================================================================== [ 30.318313] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.319263] Read of size 8 at addr ffff88800ea38c20 by task sshd/220 [ 30.320032] [ 30.320253] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.321215] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.322202] Call Trace: [ 30.322522] [ 30.322806] dump_stack_lvl+0x91/0xf0 [ 30.323314] print_report+0xcc/0x620 [ 30.323803] ? __virt_addr_valid+0x102/0x340 [ 30.324361] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.324988] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.325615] kasan_report+0xbe/0xf0 [ 30.326092] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.326740] vma_interval_tree_remove+0xc75/0xec0 [ 30.327355] vma_prepare+0xc54/0x11a0 [ 30.327842] __split_vma+0x5af/0x950 [ 30.328319] ? __pfx___split_vma+0x10/0x10 [ 30.328859] ? find_held_lock+0x2c/0x110 [ 30.329391] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.329953] ? lock_is_held_type+0x9f/0x120 [ 30.330496] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.331100] ? mtree_range_walk+0x632/0x900 [ 30.331651] ? mas_walk+0x5c7/0x7c0 [ 30.332125] do_vmi_munmap+0x1f1/0x2b0 [ 30.332615] mmap_region+0x1f9/0x2660 [ 30.333094] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.333601] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.334332] ? __pfx_lock_acquire+0x10/0x10 [ 30.334860] ? __pfx_mmap_region+0x10/0x10 [ 30.335391] ? security_mmap_addr+0x7d/0xa0 [ 30.335925] ? get_unmapped_area+0x1f5/0x3f0 [ 30.336475] do_mmap+0x854/0xf00 [ 30.336913] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.337409] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.337972] ksys_mmap_pgoff+0x3af/0x500 [ 30.338503] do_syscall_64+0x3f/0x90 [ 30.338985] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.339629] RIP: 0033:0x7ffa276e6d82 [ 30.340082] 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 [ 30.342214] RSP: 002b:00007ffc6aaca428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.343131] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffa276e6d82 [ 30.343974] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffa26b20000 [ 30.344824] RBP: 00007ffa26b20000 R08: 0000000000000009 R09: 0000000000001000 [ 30.345673] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e202342ec0 [ 30.346540] R13: 00007ffc6aaca440 R14: 00007ffc6aaca470 R15: 00007ffc6aaca7d0 [ 30.347406] [ 30.347698] [ 30.347912] Allocated by task 213: [ 30.348348] kasan_save_stack+0x22/0x50 [ 30.348857] kasan_set_track+0x25/0x30 [ 30.349348] __kasan_slab_alloc+0x59/0x70 [ 30.349868] kmem_cache_alloc+0x16b/0x370 [ 30.350391] vm_area_dup+0x20/0x160 [ 30.350842] __split_vma+0x170/0x950 [ 30.351311] split_vma+0xc6/0x110 [ 30.351754] mprotect_fixup+0x8d2/0xb30 [ 30.352259] do_mprotect_pkey+0x87e/0xd40 [ 30.352778] __x64_sys_mprotect+0x78/0xc0 [ 30.353303] do_syscall_64+0x3f/0x90 [ 30.353778] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.354466] [ 30.354685] Freed by task 213: [ 30.355081] kasan_save_stack+0x22/0x50 [ 30.355593] kasan_set_track+0x25/0x30 [ 30.356107] kasan_save_free_info+0x2b/0x50 [ 30.356636] __kasan_slab_free+0x10a/0x190 [ 30.357169] kmem_cache_free+0x10d/0x4d0 [ 30.357686] rcu_core+0x8c8/0x2860 [ 30.358133] __do_softirq+0x1b7/0x7d4 [ 30.358630] [ 30.358849] Last potentially related work creation: [ 30.359432] kasan_save_stack+0x22/0x50 [ 30.359934] __kasan_record_aux_stack+0x8e/0xa0 [ 30.360504] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.361153] remove_vma+0x139/0x170 [ 30.361604] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.362172] do_vmi_munmap+0x1f1/0x2b0 [ 30.362654] __vm_munmap+0x138/0x3a0 [ 30.363123] __x64_sys_munmap+0x59/0x80 [ 30.363621] do_syscall_64+0x3f/0x90 [ 30.364091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.364735] [ 30.364957] Second to last potentially related work creation: [ 30.365635] kasan_save_stack+0x22/0x50 [ 30.366135] __kasan_record_aux_stack+0x8e/0xa0 [ 30.366727] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.367362] remove_vma+0x139/0x170 [ 30.367809] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.368368] do_vmi_munmap+0x1f1/0x2b0 [ 30.368847] mmap_region+0x1f9/0x2660 [ 30.369323] do_mmap+0x854/0xf00 [ 30.369757] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.370249] ksys_mmap_pgoff+0x3af/0x500 [ 30.370744] do_syscall_64+0x3f/0x90 [ 30.371220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.371869] [ 30.372085] The buggy address belongs to the object at ffff88800ea38bc8 [ 30.372085] which belongs to the cache vm_area_struct of size 168 [ 30.373555] The buggy address is located 88 bytes inside of [ 30.373555] freed 168-byte region [ffff88800ea38bc8, ffff88800ea38c70) [ 30.374980] [ 30.375195] The buggy address belongs to the physical page: [ 30.375847] page:00000000da8949dd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea38 [ 30.376919] memcg:ffff88800c769601 [ 30.377337] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.377978] page_type: 0xffffffff() [ 30.378440] raw: 0100000000000200 ffff8880087a0c80 ffffea000036b880 dead000000000008 [ 30.379355] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c769601 [ 30.380251] page dumped because: kasan: bad access detected [ 30.380912] [ 30.381124] Memory state around the buggy address: [ 30.381699] ffff88800ea38b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.382581] ffff88800ea38b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.383458] >ffff88800ea38c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.384335] ^ [ 30.384874] ffff88800ea38c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.385752] ffff88800ea38d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.386652] ================================================================== [ 30.387642] Disabling lock debugging due to kernel taint [ 32.249844] BUG: Bad rss-counter state mm:000000005b20c21d type:MM_FILEPAGES val:33 [ 32.251329] BUG: Bad rss-counter state mm:000000005b20c21d type:MM_ANONPAGES val:22 [ 32.785902] BUG: Bad rss-counter state mm:00000000c283f278 type:MM_FILEPAGES val:33 [ 32.787292] BUG: Bad rss-counter state mm:00000000c283f278 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45585' (ECDSA) to the list of known hosts. 2023/06/21 07:22:06 fuzzer started 2023/06/21 07:22:06 dialing manager at localhost:36067 2023/06/21 07:22:06 checking machine... 2023/06/21 07:22:06 checking revisions... [ 33.437478] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:22:06 testing simple program... [ 33.483941] cgroup: Unknown subsys name 'net' [ 33.525311] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:22:06 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800cf37988 RCX=0000000000000001 RDX=1ffff110019e6f33 RSI=ffff88800cf37dc8 RDI=ffff88800cf37998 RBP=ffff88800cf37dc8 RSP=ffff88800cf378e0 R8 =ffffffff86149060 R9 =ffff88800cf379c8 R10=0000000000038001 R11=000000000002388b R12=0000000000000008 R13=ffff88800cf30000 R14=ffff88800cf37dd0 R15=ffff88800cf37988 RIP=ffffffff81130468 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 00007fcfcc3d8900 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=00007fcfcc9900b0 CR3=0000000016a30000 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=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=00007ffc7a7d23f8 CR3=000000000e5dc000 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=2036303a32323a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a32323a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000