syzkaller login: [ 24.074669] BUG: Bad rss-counter state mm:00000000db135e6f type:MM_FILEPAGES val:33 [ 24.075683] BUG: Bad rss-counter state mm:00000000db135e6f type:MM_ANONPAGES val:22 [ 24.252784] ================================================================== [ 24.253889] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.255016] Read of size 8 at addr ffff88800dc84b38 by task sshd/219 [ 24.255784] [ 24.256000] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.256860] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.257833] Call Trace: [ 24.258150] [ 24.258439] dump_stack_lvl+0x91/0xf0 [ 24.258925] print_report+0xcc/0x620 [ 24.259406] ? __virt_addr_valid+0x102/0x340 [ 24.259953] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.260568] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.261200] kasan_report+0xbe/0xf0 [ 24.261673] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.262296] vma_interval_tree_remove+0xc75/0xec0 [ 24.262905] vma_prepare+0xc54/0x11a0 [ 24.263386] __split_vma+0x5af/0x950 [ 24.263860] ? __pfx___split_vma+0x10/0x10 [ 24.264388] ? find_held_lock+0x2c/0x110 [ 24.264924] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.265488] ? lock_is_held_type+0x9f/0x120 [ 24.266028] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.266642] ? mtree_range_walk+0x632/0x900 [ 24.267207] ? mas_walk+0x5c7/0x7c0 [ 24.267683] do_vmi_munmap+0x1f1/0x2b0 [ 24.268179] mmap_region+0x1f9/0x2660 [ 24.268678] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.269199] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.269924] ? __pfx_lock_acquire+0x10/0x10 [ 24.270452] ? __pfx_mmap_region+0x10/0x10 [ 24.270989] ? security_mmap_addr+0x7d/0xa0 [ 24.271514] ? get_unmapped_area+0x1f5/0x3f0 [ 24.272063] do_mmap+0x854/0xf00 [ 24.272498] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.273016] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.273582] ksys_mmap_pgoff+0x3af/0x500 [ 24.274093] do_syscall_64+0x3f/0x90 [ 24.274575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.275227] RIP: 0033:0x7efea743ad82 [ 24.275681] 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 [ 24.277791] RSP: 002b:00007ffc5a213138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.278686] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efea743ad82 [ 24.279526] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efea6874000 [ 24.280361] RBP: 00007efea6874000 R08: 0000000000000009 R09: 0000000000001000 [ 24.281221] R10: 0000000000000812 R11: 0000000000000206 R12: 000055996c6eeec0 [ 24.282068] R13: 00007ffc5a213150 R14: 00007ffc5a213180 R15: 00007ffc5a2134e0 [ 24.282925] [ 24.283214] [ 24.283429] Allocated by task 212: [ 24.283866] kasan_save_stack+0x22/0x50 [ 24.284367] kasan_set_track+0x25/0x30 [ 24.284873] __kasan_slab_alloc+0x59/0x70 [ 24.285390] kmem_cache_alloc+0x16b/0x370 [ 24.285901] vm_area_dup+0x20/0x160 [ 24.286352] __split_vma+0x170/0x950 [ 24.286816] split_vma+0xc6/0x110 [ 24.287253] mprotect_fixup+0x8d2/0xb30 [ 24.287753] do_mprotect_pkey+0x87e/0xd40 [ 24.288272] __x64_sys_mprotect+0x78/0xc0 [ 24.288785] do_syscall_64+0x3f/0x90 [ 24.289276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.289922] [ 24.290136] Freed by task 212: [ 24.290549] kasan_save_stack+0x22/0x50 [ 24.291054] kasan_set_track+0x25/0x30 [ 24.291558] kasan_save_free_info+0x2b/0x50 [ 24.292098] __kasan_slab_free+0x10a/0x190 [ 24.292630] kmem_cache_free+0x10d/0x4d0 [ 24.293150] rcu_core+0x8c8/0x2860 [ 24.293594] __do_softirq+0x1b7/0x7d4 [ 24.294076] [ 24.294288] Last potentially related work creation: [ 24.294882] kasan_save_stack+0x22/0x50 [ 24.295399] __kasan_record_aux_stack+0x8e/0xa0 [ 24.295976] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.296618] remove_vma+0x139/0x170 [ 24.297080] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.297649] do_vmi_munmap+0x1f1/0x2b0 [ 24.298219] __vm_munmap+0x138/0x3a0 [ 24.298687] __x64_sys_munmap+0x59/0x80 [ 24.299185] do_syscall_64+0x3f/0x90 [ 24.299652] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.300304] [ 24.300520] The buggy address belongs to the object at ffff88800dc84ae0 [ 24.300520] which belongs to the cache vm_area_struct of size 168 [ 24.301995] The buggy address is located 88 bytes inside of [ 24.301995] freed 168-byte region [ffff88800dc84ae0, ffff88800dc84b88) [ 24.303390] [ 24.303605] The buggy address belongs to the physical page: [ 24.304252] page:000000003c79c237 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc84 [ 24.305329] memcg:ffff88800d3f0101 [ 24.305755] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.306468] page_type: 0xffffffff() [ 24.306916] raw: 0100000000000200 ffff88800879fc80 ffffea0000260600 dead000000000007 [ 24.307847] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3f0101 [ 24.308748] page dumped because: kasan: bad access detected [ 24.309427] [ 24.309647] Memory state around the buggy address: [ 24.310228] ffff88800dc84a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.311083] ffff88800dc84a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 24.311930] >ffff88800dc84b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.312785] ^ [ 24.313407] ffff88800dc84b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 24.314265] ffff88800dc84c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.315107] ================================================================== [ 24.316022] Disabling lock debugging due to kernel taint [ 26.711627] BUG: Bad rss-counter state mm:000000004d6ca6fc type:MM_FILEPAGES val:33 [ 26.712584] BUG: Bad rss-counter state mm:000000004d6ca6fc type:MM_ANONPAGES val:22 [ 27.189876] BUG: Bad rss-counter state mm:00000000d48c1592 type:MM_FILEPAGES val:33 [ 27.190864] BUG: Bad rss-counter state mm:00000000d48c1592 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35267' (ECDSA) to the list of known hosts. 2023/06/19 18:18:52 fuzzer started 2023/06/19 18:18:52 dialing manager at localhost:44161 2023/06/19 18:18:52 checking machine... 2023/06/19 18:18:52 checking revisions... [ 27.816280] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:18:52 testing simple program... [ 27.868057] cgroup: Unknown subsys name 'net' [ 27.926152] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:18:51 Registers: info registers vcpu 0 RAX=ffff88800f21af18 RBX=ffff88806ce09ee8 RCX=1ffff11001e435e3 RDX=ffff88800e9bc670 RSI=0000000000000008 RDI=ffff88806ce09ef8 RBP=0000000000000009 RSP=ffff88806ce09e50 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88806ce09ee8 R14=ffff88806ce35000 R15=ffff88800d1d8080 RIP=ffffffff8137fc89 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 00007f281e67e900 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=00007f281ec35618 CR3=000000001c9a8000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f2b1118a5c0 CR3=000000000c6b8000 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=06095319440d56bdb942a193ed5d1d27 XMM02=ec2efd57dc4c00df000000000011c288 XMM03=912d9ec456c13b43000000000011c358 XMM04=f4717ee3e7b0d82a00000000000ae988 XMM05=dfcdbad4f1609c3700000000001328e8 XMM06=8d1fb09b71730cd20000000000131358 XMM07=e042d86d42eb936e0000000000122fc0 XMM08=912d9ec456c13b43000000000011c358 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000