syzkaller login: [ 31.089846] BUG: Bad rss-counter state mm:000000007f91bd7f type:MM_FILEPAGES val:33 [ 31.090882] BUG: Bad rss-counter state mm:000000007f91bd7f type:MM_ANONPAGES val:22 [ 31.248832] ================================================================== [ 31.249713] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.250603] Read of size 8 at addr ffff8880198e74e0 by task sshd/220 [ 31.251465] [ 31.251685] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.252509] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.253420] Call Trace: [ 31.253738] [ 31.254008] dump_stack_lvl+0x91/0xf0 [ 31.254473] print_report+0xcc/0x620 [ 31.254931] ? __virt_addr_valid+0x102/0x340 [ 31.255448] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.256027] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.256629] kasan_report+0xbe/0xf0 [ 31.257080] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.257665] vma_interval_tree_remove+0xc75/0xec0 [ 31.258233] vma_prepare+0xc54/0x11a0 [ 31.258688] __split_vma+0x5af/0x950 [ 31.259138] ? __pfx___split_vma+0x10/0x10 [ 31.259647] ? find_held_lock+0x2c/0x110 [ 31.260182] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.260862] ? lock_is_held_type+0x9f/0x120 [ 31.261498] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.262212] ? mtree_range_walk+0x632/0x900 [ 31.262864] ? mas_walk+0x5c7/0x7c0 [ 31.263424] do_vmi_munmap+0x1f1/0x2b0 [ 31.264005] mmap_region+0x1f9/0x2660 [ 31.264578] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.265181] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.266020] ? __pfx_lock_acquire+0x10/0x10 [ 31.266646] ? __pfx_mmap_region+0x10/0x10 [ 31.267271] ? security_mmap_addr+0x7d/0xa0 [ 31.267901] ? get_unmapped_area+0x1f5/0x3f0 [ 31.268561] do_mmap+0x854/0xf00 [ 31.269079] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.269658] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.270320] ksys_mmap_pgoff+0x3af/0x500 [ 31.270918] do_syscall_64+0x3f/0x90 [ 31.271483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.272249] RIP: 0033:0x7f84dfdcdd82 [ 31.272794] 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 [ 31.275316] RSP: 002b:00007ffd9be6abb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.276378] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f84dfdcdd82 [ 31.277385] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f84df207000 [ 31.278383] RBP: 00007f84df207000 R08: 0000000000000009 R09: 0000000000001000 [ 31.279385] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c246813ec0 [ 31.280383] R13: 00007ffd9be6abd0 R14: 00007ffd9be6ac00 R15: 00007ffd9be6af60 [ 31.281426] [ 31.281768] [ 31.282018] Allocated by task 213: [ 31.282525] kasan_save_stack+0x22/0x50 [ 31.283117] kasan_set_track+0x25/0x30 [ 31.283698] __kasan_slab_alloc+0x59/0x70 [ 31.284314] kmem_cache_alloc+0x16b/0x370 [ 31.284934] vm_area_dup+0x20/0x160 [ 31.285468] __split_vma+0x170/0x950 [ 31.286017] split_vma+0xc6/0x110 [ 31.286534] mprotect_fixup+0x8d2/0xb30 [ 31.287126] do_mprotect_pkey+0x87e/0xd40 [ 31.287741] __x64_sys_mprotect+0x78/0xc0 [ 31.288353] do_syscall_64+0x3f/0x90 [ 31.288922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.289681] [ 31.289932] Freed by task 13: [ 31.290381] kasan_save_stack+0x22/0x50 [ 31.290974] kasan_set_track+0x25/0x30 [ 31.291555] kasan_save_free_info+0x2b/0x50 [ 31.292230] __kasan_slab_free+0x10a/0x190 [ 31.292871] kmem_cache_free+0x10d/0x4d0 [ 31.293468] rcu_core+0x8c8/0x2860 [ 31.293989] __do_softirq+0x1b7/0x7d4 [ 31.294553] [ 31.294803] Last potentially related work creation: [ 31.295496] kasan_save_stack+0x22/0x50 [ 31.296088] __kasan_record_aux_stack+0x8e/0xa0 [ 31.296774] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.297531] remove_vma+0x139/0x170 [ 31.298062] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.298712] do_vmi_munmap+0x1f1/0x2b0 [ 31.299283] __vm_munmap+0x138/0x3a0 [ 31.299832] __x64_sys_munmap+0x59/0x80 [ 31.300413] do_syscall_64+0x3f/0x90 [ 31.300991] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.301750] [ 31.302000] The buggy address belongs to the object at ffff8880198e7488 [ 31.302000] which belongs to the cache vm_area_struct of size 168 [ 31.303726] The buggy address is located 88 bytes inside of [ 31.303726] freed 168-byte region [ffff8880198e7488, ffff8880198e7530) [ 31.305385] [ 31.305636] The buggy address belongs to the physical page: [ 31.306414] page:00000000aee5927c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x198e7 [ 31.307698] memcg:ffff8880198d1601 [ 31.308196] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.308963] page_type: 0xffffffff() [ 31.309493] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a2000 dead00000000000c [ 31.310570] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880198d1601 [ 31.311642] page dumped because: kasan: bad access detected [ 31.312420] [ 31.312688] Memory state around the buggy address: [ 31.313375] ffff8880198e7380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.314381] ffff8880198e7400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.315388] >ffff8880198e7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.316388] ^ [ 31.317286] ffff8880198e7500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.318296] ffff8880198e7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.319298] ================================================================== [ 31.320411] Disabling lock debugging due to kernel taint [ 33.767641] BUG: Bad rss-counter state mm:0000000037cbd61d type:MM_FILEPAGES val:33 [ 33.768848] BUG: Bad rss-counter state mm:0000000037cbd61d type:MM_ANONPAGES val:22 [ 34.211729] BUG: Bad rss-counter state mm:00000000a06941ea type:MM_FILEPAGES val:33 [ 34.212848] BUG: Bad rss-counter state mm:00000000a06941ea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32017' (ECDSA) to the list of known hosts. 2023/06/21 02:07:29 fuzzer started 2023/06/21 02:07:30 dialing manager at localhost:36067 2023/06/21 02:07:30 checking machine... 2023/06/21 02:07:30 checking revisions... [ 34.916970] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:07:30 testing simple program... [ 34.962766] cgroup: Unknown subsys name 'net' [ 35.021763] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:07:29 Registers: info registers vcpu 0 RAX=dead000000000400 RBX=ffffea0000601340 RCX=dffffc0000000000 RDX=1ffffd40000c026b RSI=ffffea0000601340 RDI=ffffea0000601200 RBP=ffffea0000601200 RSP=ffff888015c1f868 R8 =0000000000000000 R9 =fffff940000c0266 R10=ffffea0000601337 R11=0000000000040000 R12=0000000000000003 R13=ffffea0000601358 R14=0000000000000000 R15=ffffea0000601200 RIP=ffffffff81788206 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 00007f715628f900 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=00007f71568470b0 CR3=0000000016a60000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fae188ab240 CR3=000000000b328000 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=9d06db3cf581f6af2e4cb743b147b970 XMM02=ec2efd57dc4c00df000000000011d970 XMM03=5aa9458cdc1b4155000000000011da40 XMM04=1cffa8258df5b9e900000000000ae988 XMM05=19e9129bd510f2350000000000131f58 XMM06=f829ea3358c890760000000000130dc0 XMM07=e042d86d42eb936e0000000000122400 XMM08=5aa9458cdc1b4155000000000011da40 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000