syzkaller login: [ 28.736640] BUG: Bad rss-counter state mm:0000000018828650 type:MM_FILEPAGES val:33 [ 28.738789] BUG: Bad rss-counter state mm:0000000018828650 type:MM_ANONPAGES val:22 [ 28.900954] ================================================================== [ 28.901863] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.902796] Read of size 8 at addr ffff8880164e8d08 by task sshd/221 [ 28.903550] [ 28.903762] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.904736] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.905694] Call Trace: [ 28.906018] [ 28.906318] dump_stack_lvl+0x91/0xf0 [ 28.906824] print_report+0xcc/0x620 [ 28.907301] ? __virt_addr_valid+0x102/0x340 [ 28.907849] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.908460] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.909065] kasan_report+0xbe/0xf0 [ 28.909535] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.910148] vma_interval_tree_remove+0xc75/0xec0 [ 28.910764] vma_prepare+0xc54/0x11a0 [ 28.911241] __split_vma+0x5af/0x950 [ 28.911703] ? __pfx___split_vma+0x10/0x10 [ 28.912236] ? find_held_lock+0x2c/0x110 [ 28.912759] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.913333] ? lock_is_held_type+0x9f/0x120 [ 28.913877] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.914500] ? mtree_range_walk+0x632/0x900 [ 28.915054] ? mas_walk+0x5c7/0x7c0 [ 28.915535] do_vmi_munmap+0x1f1/0x2b0 [ 28.916030] mmap_region+0x1f9/0x2660 [ 28.916527] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.917040] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.917763] ? __pfx_lock_acquire+0x10/0x10 [ 28.918316] ? __pfx_mmap_region+0x10/0x10 [ 28.918863] ? security_mmap_addr+0x7d/0xa0 [ 28.919396] ? get_unmapped_area+0x1f5/0x3f0 [ 28.919943] do_mmap+0x854/0xf00 [ 28.920390] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.920878] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.921434] ksys_mmap_pgoff+0x3af/0x500 [ 28.921935] do_syscall_64+0x3f/0x90 [ 28.922423] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.923073] RIP: 0033:0x7ff6c4324d82 [ 28.923536] 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 [ 28.925662] RSP: 002b:00007ffc6f14b268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.926579] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff6c4324d82 [ 28.927441] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff6c375e000 [ 28.928287] RBP: 00007ff6c375e000 R08: 0000000000000009 R09: 0000000000001000 [ 28.929155] R10: 0000000000000812 R11: 0000000000000206 R12: 000056329a849ec0 [ 28.930000] R13: 00007ffc6f14b280 R14: 00007ffc6f14b2b0 R15: 00007ffc6f14b610 [ 28.930878] [ 28.931169] [ 28.931384] Allocated by task 214: [ 28.931810] kasan_save_stack+0x22/0x50 [ 28.932315] kasan_set_track+0x25/0x30 [ 28.932806] __kasan_slab_alloc+0x59/0x70 [ 28.933331] kmem_cache_alloc+0x16b/0x370 [ 28.933851] vm_area_dup+0x20/0x160 [ 28.934306] __split_vma+0x170/0x950 [ 28.934769] split_vma+0xc6/0x110 [ 28.935203] mprotect_fixup+0x8d2/0xb30 [ 28.935703] do_mprotect_pkey+0x87e/0xd40 [ 28.936218] __x64_sys_mprotect+0x78/0xc0 [ 28.936733] do_syscall_64+0x3f/0x90 [ 28.937204] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.937844] [ 28.938056] Freed by task 214: [ 28.938459] kasan_save_stack+0x22/0x50 [ 28.938956] kasan_set_track+0x25/0x30 [ 28.939447] kasan_save_free_info+0x2b/0x50 [ 28.939969] __kasan_slab_free+0x10a/0x190 [ 28.940495] kmem_cache_free+0x10d/0x4d0 [ 28.940996] rcu_core+0x8c8/0x2860 [ 28.941434] __do_softirq+0x1b7/0x7d4 [ 28.941911] [ 28.942126] Last potentially related work creation: [ 28.942711] kasan_save_stack+0x22/0x50 [ 28.943208] __kasan_record_aux_stack+0x8e/0xa0 [ 28.943777] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.944417] remove_vma+0x139/0x170 [ 28.944863] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.945413] do_vmi_munmap+0x1f1/0x2b0 [ 28.945995] __vm_munmap+0x138/0x3a0 [ 28.946489] __x64_sys_munmap+0x59/0x80 [ 28.946979] do_syscall_64+0x3f/0x90 [ 28.947449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.948085] [ 28.948298] The buggy address belongs to the object at ffff8880164e8cb0 [ 28.948298] which belongs to the cache vm_area_struct of size 168 [ 28.949743] The buggy address is located 88 bytes inside of [ 28.949743] freed 168-byte region [ffff8880164e8cb0, ffff8880164e8d58) [ 28.951136] [ 28.951352] The buggy address belongs to the physical page: [ 28.952007] page:0000000049d1f2fd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x164e8 [ 28.953078] memcg:ffff888016626201 [ 28.953496] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.954126] page_type: 0xffffffff() [ 28.954573] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.955485] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016626201 [ 28.956373] page dumped because: kasan: bad access detected [ 28.957017] [ 28.957228] Memory state around the buggy address: [ 28.957799] ffff8880164e8c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 28.958657] ffff8880164e8c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 28.959505] >ffff8880164e8d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 28.960338] ^ [ 28.960771] ffff8880164e8d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.961616] ffff8880164e8e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.962468] ================================================================== [ 28.963457] Disabling lock debugging due to kernel taint [ 31.567463] BUG: Bad rss-counter state mm:00000000d2fbf409 type:MM_FILEPAGES val:33 [ 31.568484] BUG: Bad rss-counter state mm:00000000d2fbf409 type:MM_ANONPAGES val:22 [ 32.077877] BUG: Bad rss-counter state mm:0000000056a3552c type:MM_FILEPAGES val:33 [ 32.079114] BUG: Bad rss-counter state mm:0000000056a3552c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36374' (ECDSA) to the list of known hosts. 2023/06/20 17:30:58 fuzzer started 2023/06/20 17:30:58 dialing manager at localhost:36067 2023/06/20 17:30:58 checking machine... 2023/06/20 17:30:58 checking revisions... [ 32.706058] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:30:59 testing simple program... [ 32.756664] cgroup: Unknown subsys name 'net' [ 32.815316] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:30:58 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=0000000000000001 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=00007ffee35b1368 CR3=0000000005482000 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=00007f8979233510000055658a32e790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=00000000f0000000 RSI=0000000000000008 RDI=ffffea00006e2ee8 RBP=0000000000000000 RSP=ffff88801474f488 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=1ffff1100fffb8bd R12=ffffea00006e2ec8 R13=ffff88807ffdc5e0 R14=0000000000000002 R15=ffff88807ffdc500 RIP=ffffffff8178f951 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0fc0d16900 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=00007f0fc0234000 CR3=000000000d684000 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=b3285ca56c489dff0000000000109ad8 XMM02=ac585006bc0bee6f00000000000f7b70 XMM03=2e86c1e8fc57753200000000000f76b0 XMM04=bc71dfa6f5fe9f6900000000000ae988 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=8cdec34d38af4c0a00000000000f7638 XMM07=693bd129e125714a00000000000f7978 XMM08=21f863e944307e3e00000000001319e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000