syzkaller login: [ 35.794245] BUG: Bad rss-counter state mm:00000000bfa801a3 type:MM_FILEPAGES val:33 [ 35.795506] BUG: Bad rss-counter state mm:00000000bfa801a3 type:MM_ANONPAGES val:22 [ 35.836414] ================================================================== [ 35.837450] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.838495] Read of size 8 at addr ffff88800def4a50 by task sshd/219 [ 35.839356] [ 35.839597] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.840554] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.841647] Call Trace: [ 35.842007] [ 35.842333] dump_stack_lvl+0x91/0xf0 [ 35.842877] print_report+0xcc/0x620 [ 35.843417] ? __virt_addr_valid+0x102/0x340 [ 35.844028] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.844712] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.845438] kasan_report+0xbe/0xf0 [ 35.845984] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.846705] vma_interval_tree_remove+0xc75/0xec0 [ 35.847399] vma_prepare+0xc54/0x11a0 [ 35.847952] __split_vma+0x5af/0x950 [ 35.848506] ? __pfx___split_vma+0x10/0x10 [ 35.849125] ? find_held_lock+0x2c/0x110 [ 35.849733] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.850392] ? lock_is_held_type+0x9f/0x120 [ 35.851017] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.851716] ? mtree_range_walk+0x632/0x900 [ 35.852350] ? mas_walk+0x5c7/0x7c0 [ 35.852902] do_vmi_munmap+0x1f1/0x2b0 [ 35.853465] mmap_region+0x1f9/0x2660 [ 35.854023] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.854617] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.855437] ? __pfx_lock_acquire+0x10/0x10 [ 35.856059] ? __pfx_mmap_region+0x10/0x10 [ 35.856674] ? security_mmap_addr+0x7d/0xa0 [ 35.857304] ? get_unmapped_area+0x1f5/0x3f0 [ 35.857946] do_mmap+0x854/0xf00 [ 35.858453] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.859030] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.859688] ksys_mmap_pgoff+0x3af/0x500 [ 35.860276] do_syscall_64+0x3f/0x90 [ 35.860843] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.861599] RIP: 0033:0x7f0e86ae6d82 [ 35.862126] 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 [ 35.864847] RSP: 002b:00007ffc9ee9b3d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.865885] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0e86ae6d82 [ 35.866890] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0e85f20000 [ 35.867874] RBP: 00007f0e85f20000 R08: 0000000000000009 R09: 0000000000001000 [ 35.868872] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b5a72ceec0 [ 35.869858] R13: 00007ffc9ee9b3f0 R14: 00007ffc9ee9b420 R15: 00007ffc9ee9b780 [ 35.870861] [ 35.871199] [ 35.871447] Allocated by task 212: [ 35.871944] kasan_save_stack+0x22/0x50 [ 35.872525] kasan_set_track+0x25/0x30 [ 35.873106] __kasan_slab_alloc+0x59/0x70 [ 35.873713] kmem_cache_alloc+0x16b/0x370 [ 35.874315] vm_area_dup+0x20/0x160 [ 35.874839] __split_vma+0x170/0x950 [ 35.875372] split_vma+0xc6/0x110 [ 35.875883] mprotect_fixup+0x8d2/0xb30 [ 35.876456] do_mprotect_pkey+0x87e/0xd40 [ 35.877085] __x64_sys_mprotect+0x78/0xc0 [ 35.877681] do_syscall_64+0x3f/0x90 [ 35.878235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.878981] [ 35.879233] Freed by task 212: [ 35.879682] kasan_save_stack+0x22/0x50 [ 35.880271] kasan_set_track+0x25/0x30 [ 35.880848] kasan_save_free_info+0x2b/0x50 [ 35.881467] __kasan_slab_free+0x10a/0x190 [ 35.882076] kmem_cache_free+0x10d/0x4d0 [ 35.882672] rcu_core+0x8c8/0x2860 [ 35.883182] __do_softirq+0x1b7/0x7d4 [ 35.883731] [ 35.883979] Last potentially related work creation: [ 35.884662] kasan_save_stack+0x22/0x50 [ 35.885260] __kasan_record_aux_stack+0x8e/0xa0 [ 35.885916] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.886662] remove_vma+0x139/0x170 [ 35.887182] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.887832] do_vmi_munmap+0x1f1/0x2b0 [ 35.888385] __vm_munmap+0x138/0x3a0 [ 35.888944] __x64_sys_munmap+0x59/0x80 [ 35.889521] do_syscall_64+0x3f/0x90 [ 35.890067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.890818] [ 35.891062] Second to last potentially related work creation: [ 35.891854] kasan_save_stack+0x22/0x50 [ 35.892424] __kasan_record_aux_stack+0x8e/0xa0 [ 35.893091] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.893831] remove_vma+0x139/0x170 [ 35.894349] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.894996] do_vmi_munmap+0x1f1/0x2b0 [ 35.895555] __vm_munmap+0x138/0x3a0 [ 35.896101] __x64_sys_munmap+0x59/0x80 [ 35.896669] do_syscall_64+0x3f/0x90 [ 35.897241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.897982] [ 35.898227] The buggy address belongs to the object at ffff88800def49f8 [ 35.898227] which belongs to the cache vm_area_struct of size 168 [ 35.899935] The buggy address is located 88 bytes inside of [ 35.899935] freed 168-byte region [ffff88800def49f8, ffff88800def4aa0) [ 35.901580] [ 35.901827] The buggy address belongs to the physical page: [ 35.902602] page:00000000f62db495 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdef4 [ 35.903864] memcg:ffff88800df49501 [ 35.904355] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.905249] page_type: 0xffffffff() [ 35.905766] raw: 0100000000000200 ffff8880087a0c80 ffffea0000383780 dead000000000003 [ 35.906825] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df49501 [ 35.907877] page dumped because: kasan: bad access detected [ 35.908650] [ 35.908912] Memory state around the buggy address: [ 35.909586] ffff88800def4900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.910574] ffff88800def4980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 35.911571] >ffff88800def4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.912522] ^ [ 35.913305] ffff88800def4a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 35.914253] ffff88800def4b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.915238] ================================================================== [ 35.916364] Disabling lock debugging due to kernel taint [ 38.051201] BUG: Bad rss-counter state mm:000000003f7016bb type:MM_FILEPAGES val:33 [ 38.051959] BUG: Bad rss-counter state mm:000000003f7016bb type:MM_ANONPAGES val:22 [ 38.482447] BUG: Bad rss-counter state mm:00000000ff312c00 type:MM_FILEPAGES val:33 [ 38.483220] BUG: Bad rss-counter state mm:00000000ff312c00 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35994' (ECDSA) to the list of known hosts. 2023/06/21 01:31:21 fuzzer started 2023/06/21 01:31:21 dialing manager at localhost:36067 2023/06/21 01:31:21 checking machine... 2023/06/21 01:31:21 checking revisions... [ 39.136162] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:31:21 testing simple program... [ 39.175352] cgroup: Unknown subsys name 'net' [ 39.221466] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:31:21 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fa39df456e0 CR3=0000000010342000 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=2030323a31333a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a31333a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffea000023b180 RBX=0000000000000200 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88800f9bfca0 RSP=ffff88800f9bfbe0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffffffff81806f71 R12=ffff8880087b8780 R13=ffff88806cf40e10 R14=ffff88806cf40e10 R15=ffff88806cf40df0 RIP=ffffffff81806fdf RFL=00000082 [--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 00007f1aee286900 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=00007ffc074ba000 CR3=00000000170b0000 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=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