syzkaller login: [ 28.707580] BUG: Bad rss-counter state mm:00000000d961e215 type:MM_FILEPAGES val:33 [ 28.709453] BUG: Bad rss-counter state mm:00000000d961e215 type:MM_ANONPAGES val:22 [ 28.880286] ================================================================== [ 28.881348] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.882441] Read of size 8 at addr ffff8880167da228 by task sshd/221 [ 28.883357] [ 28.883616] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.884638] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.885783] Call Trace: [ 28.886160] [ 28.886498] dump_stack_lvl+0x91/0xf0 [ 28.887085] print_report+0xcc/0x620 [ 28.887666] ? __virt_addr_valid+0x102/0x340 [ 28.888329] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.889060] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.889808] kasan_report+0xbe/0xf0 [ 28.890381] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.891146] vma_interval_tree_remove+0xc75/0xec0 [ 28.891913] vma_prepare+0xc54/0x11a0 [ 28.892498] __split_vma+0x5af/0x950 [ 28.893071] ? __pfx___split_vma+0x10/0x10 [ 28.893701] ? find_held_lock+0x2c/0x110 [ 28.894342] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.895022] ? lock_is_held_type+0x9f/0x120 [ 28.895688] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.896419] ? mtree_range_walk+0x632/0x900 [ 28.897088] ? mas_walk+0x5c7/0x7c0 [ 28.897661] do_vmi_munmap+0x1f1/0x2b0 [ 28.898253] mmap_region+0x1f9/0x2660 [ 28.898839] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.899475] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.900337] ? __pfx_lock_acquire+0x10/0x10 [ 28.900997] ? __pfx_mmap_region+0x10/0x10 [ 28.901620] ? security_mmap_addr+0x7d/0xa0 [ 28.902233] ? get_unmapped_area+0x1f5/0x3f0 [ 28.902875] do_mmap+0x854/0xf00 [ 28.903404] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.903977] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.904631] ksys_mmap_pgoff+0x3af/0x500 [ 28.905219] do_syscall_64+0x3f/0x90 [ 28.905784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.906543] RIP: 0033:0x7f47ae45ad82 [ 28.907073] 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 [ 28.909650] RSP: 002b:00007fffc99f4978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.910737] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f47ae45ad82 [ 28.911778] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f47ad894000 [ 28.912793] RBP: 00007f47ad894000 R08: 0000000000000009 R09: 0000000000001000 [ 28.913799] R10: 0000000000000812 R11: 0000000000000206 R12: 00005624b7985d90 [ 28.914809] R13: 00007fffc99f4990 R14: 00007fffc99f49c0 R15: 00007fffc99f4d20 [ 28.915853] [ 28.916199] [ 28.916456] Allocated by task 213: [ 28.916966] kasan_save_stack+0x22/0x50 [ 28.917574] kasan_set_track+0x25/0x30 [ 28.918168] __kasan_slab_alloc+0x59/0x70 [ 28.918792] kmem_cache_alloc+0x16b/0x370 [ 28.919420] vm_area_dup+0x20/0x160 [ 28.919961] __split_vma+0x170/0x950 [ 28.920514] split_vma+0xc6/0x110 [ 28.921037] mprotect_fixup+0x8d2/0xb30 [ 28.921644] do_mprotect_pkey+0x87e/0xd40 [ 28.922260] __x64_sys_mprotect+0x78/0xc0 [ 28.922890] do_syscall_64+0x3f/0x90 [ 28.923482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.924260] [ 28.924519] Freed by task 213: [ 28.924988] kasan_save_stack+0x22/0x50 [ 28.925582] kasan_set_track+0x25/0x30 [ 28.926164] kasan_save_free_info+0x2b/0x50 [ 28.926806] __kasan_slab_free+0x10a/0x190 [ 28.927475] kmem_cache_free+0x10d/0x4d0 [ 28.928083] rcu_core+0x8c8/0x2860 [ 28.928613] __do_softirq+0x1b7/0x7d4 [ 28.929184] [ 28.929444] Last potentially related work creation: [ 28.930136] kasan_save_stack+0x22/0x50 [ 28.930737] __kasan_record_aux_stack+0x8e/0xa0 [ 28.931444] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.932204] remove_vma+0x139/0x170 [ 28.932752] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.933411] do_vmi_munmap+0x1f1/0x2b0 [ 28.933988] __vm_munmap+0x138/0x3a0 [ 28.934539] __x64_sys_munmap+0x59/0x80 [ 28.935132] do_syscall_64+0x3f/0x90 [ 28.935711] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.936471] [ 28.936730] The buggy address belongs to the object at ffff8880167da1d0 [ 28.936730] which belongs to the cache vm_area_struct of size 168 [ 28.938472] The buggy address is located 88 bytes inside of [ 28.938472] freed 168-byte region [ffff8880167da1d0, ffff8880167da278) [ 28.940159] [ 28.940418] The buggy address belongs to the physical page: [ 28.941209] page:00000000a36ebeca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167da [ 28.942526] memcg:ffff888016f66c01 [ 28.943043] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.943831] page_type: 0xffffffff() [ 28.944376] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.945493] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016f66c01 [ 28.946569] page dumped because: kasan: bad access detected [ 28.947368] [ 28.947627] Memory state around the buggy address: [ 28.948313] ffff8880167da100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.949335] ffff8880167da180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 28.950352] >ffff8880167da200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 28.951369] ^ [ 28.952026] ffff8880167da280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 28.953036] ffff8880167da300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 28.954041] ================================================================== [ 28.955569] Disabling lock debugging due to kernel taint [ 31.435802] BUG: Bad rss-counter state mm:000000002d6e44cc type:MM_FILEPAGES val:33 [ 31.436936] BUG: Bad rss-counter state mm:000000002d6e44cc type:MM_ANONPAGES val:22 [ 31.926505] BUG: Bad rss-counter state mm:00000000822277ad type:MM_FILEPAGES val:33 [ 31.927954] BUG: Bad rss-counter state mm:00000000822277ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40600' (ECDSA) to the list of known hosts. 2023/06/20 11:24:05 fuzzer started 2023/06/20 11:24:05 dialing manager at localhost:36067 2023/06/20 11:24:05 checking machine... 2023/06/20 11:24:05 checking revisions... [ 32.617823] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:24:05 testing simple program... [ 32.670103] cgroup: Unknown subsys name 'net' [ 32.732333] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:24:05 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=00007f4eef9c89e0 CR3=000000000dbfa000 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=2034303a34323a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a34323a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888015f20001 RBX=ffff888015f1f158 RCX=0000000000000001 RDX=ffff888015f1fa01 RSI=ffff888015f1fa80 RDI=ffff888015f1f168 RBP=ffff888015f1fa80 RSP=ffff888015f1f0b0 R8 =0000000000000001 R9 =ffff888015f1f198 R10=0000000000038001 R11=00000000000b3f57 R12=0000000000000008 R13=ffff888015f18000 R14=ffff888015f1fa80 R15=ffff888015f1f158 RIP=ffffffff8113048d RFL=00000297 [--S-APC] 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 00007fa3d81aa900 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=00007fa3d816f008 CR3=0000000018fbe000 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