syzkaller login: [ 32.692657] BUG: Bad rss-counter state mm:000000006e22c7cb type:MM_FILEPAGES val:33 [ 32.694854] BUG: Bad rss-counter state mm:000000006e22c7cb type:MM_ANONPAGES val:22 [ 32.852665] ================================================================== [ 32.853458] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.854168] Read of size 8 at addr ffff888015b61310 by task sshd/221 [ 32.854787] [ 32.854964] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.855715] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.856838] Call Trace: [ 32.857103] [ 32.857336] dump_stack_lvl+0x91/0xf0 [ 32.857735] print_report+0xcc/0x620 [ 32.858127] ? __virt_addr_valid+0x102/0x340 [ 32.858630] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.859152] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.859644] kasan_report+0xbe/0xf0 [ 32.860060] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.860551] vma_interval_tree_remove+0xc75/0xec0 [ 32.861040] vma_prepare+0xc54/0x11a0 [ 32.861413] __split_vma+0x5af/0x950 [ 32.861809] ? __pfx___split_vma+0x10/0x10 [ 32.862240] ? find_held_lock+0x2c/0x110 [ 32.862639] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.863130] ? lock_is_held_type+0x9f/0x120 [ 32.863554] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.864042] ? mtree_range_walk+0x632/0x900 [ 32.864478] ? mas_walk+0x5c7/0x7c0 [ 32.864839] do_vmi_munmap+0x1f1/0x2b0 [ 32.865233] mmap_region+0x1f9/0x2660 [ 32.865620] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.866032] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.866591] ? __pfx_lock_acquire+0x10/0x10 [ 32.867006] ? __pfx_mmap_region+0x10/0x10 [ 32.867457] ? security_mmap_addr+0x7d/0xa0 [ 32.867878] ? get_unmapped_area+0x1f5/0x3f0 [ 32.868316] do_mmap+0x854/0xf00 [ 32.868667] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.869055] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.869496] ksys_mmap_pgoff+0x3af/0x500 [ 32.869902] do_syscall_64+0x3f/0x90 [ 32.870276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.870759] RIP: 0033:0x7fab6b208d82 [ 32.871144] 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 [ 32.872759] RSP: 002b:00007ffeb4ff30a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.873446] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fab6b208d82 [ 32.874104] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fab6a642000 [ 32.874766] RBP: 00007fab6a642000 R08: 0000000000000009 R09: 0000000000001000 [ 32.875449] R10: 0000000000000812 R11: 0000000000000206 R12: 00005609ba762f60 [ 32.876086] R13: 00007ffeb4ff30c0 R14: 00007ffeb4ff30f0 R15: 00007ffeb4ff3450 [ 32.876733] [ 32.876954] [ 32.877112] Allocated by task 214: [ 32.877437] kasan_save_stack+0x22/0x50 [ 32.877827] kasan_set_track+0x25/0x30 [ 32.878208] __kasan_slab_alloc+0x59/0x70 [ 32.878603] kmem_cache_alloc+0x16b/0x370 [ 32.878986] vm_area_dup+0x20/0x160 [ 32.879351] __split_vma+0x170/0x950 [ 32.879701] split_vma+0xc6/0x110 [ 32.880024] mprotect_fixup+0x8d2/0xb30 [ 32.880402] do_mprotect_pkey+0x87e/0xd40 [ 32.880795] __x64_sys_mprotect+0x78/0xc0 [ 32.881196] do_syscall_64+0x3f/0x90 [ 32.881556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.882059] [ 32.882227] Freed by task 204: [ 32.882523] kasan_save_stack+0x22/0x50 [ 32.882903] kasan_set_track+0x25/0x30 [ 32.883295] kasan_save_free_info+0x2b/0x50 [ 32.883699] __kasan_slab_free+0x10a/0x190 [ 32.884095] kmem_cache_free+0x10d/0x4d0 [ 32.884474] rcu_core+0x8c8/0x2860 [ 32.884803] __do_softirq+0x1b7/0x7d4 [ 32.885155] [ 32.885321] Last potentially related work creation: [ 32.885762] kasan_save_stack+0x22/0x50 [ 32.886136] __kasan_record_aux_stack+0x8e/0xa0 [ 32.886566] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.887045] remove_vma+0x139/0x170 [ 32.887427] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.887857] do_vmi_munmap+0x1f1/0x2b0 [ 32.888220] __vm_munmap+0x138/0x3a0 [ 32.888579] __x64_sys_munmap+0x59/0x80 [ 32.888952] do_syscall_64+0x3f/0x90 [ 32.889308] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.889787] [ 32.889950] The buggy address belongs to the object at ffff888015b612b8 [ 32.889950] which belongs to the cache vm_area_struct of size 168 [ 32.891071] The buggy address is located 88 bytes inside of [ 32.891071] freed 168-byte region [ffff888015b612b8, ffff888015b61360) [ 32.892150] [ 32.892317] The buggy address belongs to the physical page: [ 32.892824] page:00000000babff4e6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b61 [ 32.893664] memcg:ffff88801913ca01 [ 32.893992] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.894479] page_type: 0xffffffff() [ 32.894816] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.895555] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801913ca01 [ 32.896228] page dumped because: kasan: bad access detected [ 32.896713] [ 32.896878] Memory state around the buggy address: [ 32.897332] ffff888015b61200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.898165] ffff888015b61280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.898834] >ffff888015b61300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.899532] ^ [ 32.899902] ffff888015b61380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.900577] ffff888015b61400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.901246] ================================================================== [ 32.902043] Disabling lock debugging due to kernel taint [ 34.948166] BUG: Bad rss-counter state mm:00000000923cad60 type:MM_FILEPAGES val:33 [ 34.948863] BUG: Bad rss-counter state mm:00000000923cad60 type:MM_ANONPAGES val:22 [ 35.334410] BUG: Bad rss-counter state mm:000000002d0ab2ba type:MM_FILEPAGES val:33 [ 35.335152] BUG: Bad rss-counter state mm:000000002d0ab2ba type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64411' (ECDSA) to the list of known hosts. 2023/06/20 09:03:04 fuzzer started 2023/06/20 09:03:05 dialing manager at localhost:44161 2023/06/20 09:03:05 checking machine... 2023/06/20 09:03:05 checking revisions... [ 35.923476] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:03:05 testing simple program... [ 35.966303] cgroup: Unknown subsys name 'net' [ 36.003684] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:03:02 Registers: info registers vcpu 0 RAX=ffffea00003cc940 RBX=ffff88800f325500 RCX=ffffea00003cc801 RDX=ffff88808f325500 RSI=ffff88800cc86820 RDI=ffff8880087b03c0 RBP=0000000000000000 RSP=ffff88801469f928 R8 =ffff88800f325500 R9 =0000000000000000 R10=ffffea0000332180 R11=0000000080800051 R12=dffffc0000000000 R13=ffff88801469f968 R14=0000000000000000 R15=ffff88800cc86820 RIP=ffffffff81810213 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9875029900 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=00007f9874549000 CR3=000000000d6b8000 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=6ad554d6ee246c8b9545fa535f50deca XMM02=eff9b2d0a8fce9cb000000000011cab8 XMM03=2c67c8bc2e329bc3000000000011cbe0 XMM04=958649e9da21abc500000000000ae988 XMM05=969334450b03da940000000000134d08 XMM06=c291bd5c70af25b90000000000133af8 XMM07=fb795ef6d65770560000000000124080 XMM08=2c67c8bc2e329bc3000000000011cbe0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880190a6000 RCX=1ffff1100fffbf00 RDX=ffffffffffffffff RSI=0000000000000012 RDI=ffff88807ffdf800 RBP=ffff88807ffdc000 RSP=ffff88801671f6c8 R8 =0000000000000000 R9 =fffff940000da6f0 R10=ffffea00006d3787 R11=0000000000000000 R12=0000000000000012 R13=ffffffffffffffff R14=ffff88800fae4000 R15=ffffea00006d3780 RIP=ffffffff816aceaf 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 00007ff7b72aa900 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=00007ff7b7263008 CR3=0000000019ef4000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000