syzkaller login: [ 31.725705] BUG: Bad rss-counter state mm:0000000098646627 type:MM_FILEPAGES val:33 [ 31.727235] BUG: Bad rss-counter state mm:0000000098646627 type:MM_ANONPAGES val:22 [ 31.903674] ================================================================== [ 31.904646] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.905614] Read of size 8 at addr ffff888016a064e0 by task sshd/220 [ 31.906555] [ 31.906801] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.907712] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.908788] Call Trace: [ 31.909136] [ 31.909440] dump_stack_lvl+0x91/0xf0 [ 31.909962] print_report+0xcc/0x620 [ 31.910501] ? __virt_addr_valid+0x102/0x340 [ 31.911102] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.911773] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.912431] kasan_report+0xbe/0xf0 [ 31.912929] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.913586] vma_interval_tree_remove+0xc75/0xec0 [ 31.914216] vma_prepare+0xc54/0x11a0 [ 31.914745] __split_vma+0x5af/0x950 [ 31.915236] ? __pfx___split_vma+0x10/0x10 [ 31.915784] ? find_held_lock+0x2c/0x110 [ 31.916342] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.916933] ? lock_is_held_type+0x9f/0x120 [ 31.917495] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.918121] ? mtree_range_walk+0x632/0x900 [ 31.918704] ? mas_walk+0x5c7/0x7c0 [ 31.919201] do_vmi_munmap+0x1f1/0x2b0 [ 31.919714] mmap_region+0x1f9/0x2660 [ 31.920214] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.920755] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.921497] ? __pfx_lock_acquire+0x10/0x10 [ 31.922052] ? __pfx_mmap_region+0x10/0x10 [ 31.922626] ? security_mmap_addr+0x7d/0xa0 [ 31.923175] ? get_unmapped_area+0x1f5/0x3f0 [ 31.923746] do_mmap+0x854/0xf00 [ 31.924212] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.924740] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.925331] ksys_mmap_pgoff+0x3af/0x500 [ 31.925859] do_syscall_64+0x3f/0x90 [ 31.926362] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.927044] RIP: 0033:0x7f214d901d82 [ 31.927520] 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 [ 31.929742] RSP: 002b:00007fff07b247a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.930709] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f214d901d82 [ 31.931585] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f214cd3b000 [ 31.932461] RBP: 00007f214cd3b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.933352] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561777c06f70 [ 31.934238] R13: 00007fff07b247c0 R14: 00007fff07b247f0 R15: 00007fff07b24b50 [ 31.935143] [ 31.935451] [ 31.935675] Allocated by task 213: [ 31.936122] kasan_save_stack+0x22/0x50 [ 31.936647] kasan_set_track+0x25/0x30 [ 31.937159] __kasan_slab_alloc+0x59/0x70 [ 31.937711] kmem_cache_alloc+0x16b/0x370 [ 31.938245] vm_area_dup+0x20/0x160 [ 31.938744] __split_vma+0x170/0x950 [ 31.939231] split_vma+0xc6/0x110 [ 31.939686] mprotect_fixup+0x8d2/0xb30 [ 31.940210] do_mprotect_pkey+0x87e/0xd40 [ 31.940760] __x64_sys_mprotect+0x78/0xc0 [ 31.941301] do_syscall_64+0x3f/0x90 [ 31.941796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.942469] [ 31.942700] Freed by task 213: [ 31.943113] kasan_save_stack+0x22/0x50 [ 31.943635] kasan_set_track+0x25/0x30 [ 31.944148] kasan_save_free_info+0x2b/0x50 [ 31.944710] __kasan_slab_free+0x10a/0x190 [ 31.945271] kmem_cache_free+0x10d/0x4d0 [ 31.945804] rcu_core+0x8c8/0x2860 [ 31.946271] __do_softirq+0x1b7/0x7d4 [ 31.946794] [ 31.947024] Last potentially related work creation: [ 31.947665] kasan_save_stack+0x22/0x50 [ 31.948207] __kasan_record_aux_stack+0x8e/0xa0 [ 31.948821] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.949508] remove_vma+0x139/0x170 [ 31.949988] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.950590] do_vmi_munmap+0x1f1/0x2b0 [ 31.951112] __vm_munmap+0x138/0x3a0 [ 31.951613] __x64_sys_munmap+0x59/0x80 [ 31.952147] do_syscall_64+0x3f/0x90 [ 31.952658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.953325] [ 31.953552] The buggy address belongs to the object at ffff888016a06488 [ 31.953552] which belongs to the cache vm_area_struct of size 168 [ 31.955150] The buggy address is located 88 bytes inside of [ 31.955150] freed 168-byte region [ffff888016a06488, ffff888016a06530) [ 31.956610] [ 31.956840] The buggy address belongs to the physical page: [ 31.957520] page:000000006fcc0ffa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a06 [ 31.958702] memcg:ffff888016916a01 [ 31.959142] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.959870] page_type: 0xffffffff() [ 31.960335] raw: 0100000000000200 ffff88800879fc80 ffffea0000260d00 dead000000000005 [ 31.961571] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016916a01 [ 31.962812] page dumped because: kasan: bad access detected [ 31.963707] [ 31.963995] Memory state around the buggy address: [ 31.964774] ffff888016a06380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.965920] ffff888016a06400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.967087] >ffff888016a06480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.968209] ^ [ 31.969222] ffff888016a06500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.970360] ffff888016a06580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.971512] ================================================================== [ 31.972831] Disabling lock debugging due to kernel taint [ 33.615620] BUG: Bad rss-counter state mm:000000008199c0af type:MM_FILEPAGES val:33 [ 33.616808] BUG: Bad rss-counter state mm:000000008199c0af type:MM_ANONPAGES val:22 [ 34.072612] BUG: Bad rss-counter state mm:00000000e622f9df type:MM_FILEPAGES val:33 [ 34.073766] BUG: Bad rss-counter state mm:00000000e622f9df type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25609' (ECDSA) to the list of known hosts. 2023/06/20 00:56:36 fuzzer started 2023/06/20 00:56:36 dialing manager at localhost:44161 2023/06/20 00:56:36 checking machine... 2023/06/20 00:56:36 checking revisions... [ 34.717098] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:56:36 testing simple program... [ 34.763958] cgroup: Unknown subsys name 'net' [ 34.814635] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:56:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000001 RDX=1ffffd40000d8fe6 RSI=ffffea00006c7f80 RDI=ffffea00006c7f30 RBP=ffffea00006c7f00 RSP=ffff888008d7fb20 R8 =0000000000000000 R9 =ffff88807ffdc600 R10=ffffea00006c7ff0 R11=000000000001b1ff R12=0000000000000001 R13=ffffea00006c7f80 R14=ffffea00006c7f80 R15=ffff88807ffdc500 RIP=ffffffff81789b6d 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 =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=00007fae0baeec00 CR3=000000000cff4000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=9371292f3de375e400000000000ae988 XMM05=95e000a46a359c0b0000000000134c88 XMM06=4fda316b135da52b0000000000133a78 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000020 RBX=0000000000000003 RCX=0000000000000000 RDX=ffff88800c959200 RSI=ffffffff84e38f80 RDI=0000000000000003 RBP=ffffffff84e38f80 RSP=ffff88800b86fcb8 R8 =0000000000000007 R9 =0000000000001000 R10=ffff88800c95921e R11=0000000000000000 R12=0000000000000003 R13=0000000000000005 R14=ffff88800c95921c R15=ffff88800b86fe59 RIP=ffffffff814c0410 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd195f7c900 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=00007fd19603950c CR3=000000000c5c8000 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=6720646572637465733a4d41503d706f 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