syzkaller login: [ 28.827579] BUG: Bad rss-counter state mm:000000003ecb399b type:MM_FILEPAGES val:33 [ 28.828772] BUG: Bad rss-counter state mm:000000003ecb399b type:MM_ANONPAGES val:22 [ 28.889976] ================================================================== [ 28.891056] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.892264] Read of size 8 at addr ffff8880197253f8 by task sshd/221 [ 28.893128] [ 28.893357] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.894304] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.895343] Call Trace: [ 28.895681] [ 28.895989] dump_stack_lvl+0x91/0xf0 [ 28.896508] print_report+0xcc/0x620 [ 28.897039] ? __virt_addr_valid+0x102/0x340 [ 28.897636] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.898309] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.898972] kasan_report+0xbe/0xf0 [ 28.899484] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.900150] vma_interval_tree_remove+0xc75/0xec0 [ 28.900804] vma_prepare+0xc54/0x11a0 [ 28.901334] __split_vma+0x5af/0x950 [ 28.901848] ? __pfx___split_vma+0x10/0x10 [ 28.902422] ? find_held_lock+0x2c/0x110 [ 28.902989] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.903595] ? lock_is_held_type+0x9f/0x120 [ 28.904176] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.904833] ? mtree_range_walk+0x632/0x900 [ 28.905427] ? mas_walk+0x5c7/0x7c0 [ 28.905936] do_vmi_munmap+0x1f1/0x2b0 [ 28.906463] mmap_region+0x1f9/0x2660 [ 28.906986] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.907538] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.908302] ? __pfx_lock_acquire+0x10/0x10 [ 28.908874] ? __pfx_mmap_region+0x10/0x10 [ 28.909457] ? security_mmap_addr+0x7d/0xa0 [ 28.910020] ? get_unmapped_area+0x1f5/0x3f0 [ 28.910602] do_mmap+0x854/0xf00 [ 28.911078] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.911631] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.912224] ksys_mmap_pgoff+0x3af/0x500 [ 28.912766] do_syscall_64+0x3f/0x90 [ 28.913301] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.913990] RIP: 0033:0x7f2b49e58d82 [ 28.914472] 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 [ 28.916726] RSP: 002b:00007ffeecd68018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.917690] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2b49e58d82 [ 28.918587] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2b49292000 [ 28.919480] RBP: 00007f2b49292000 R08: 0000000000000009 R09: 0000000000001000 [ 28.920381] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558ef4726b20 [ 28.921293] R13: 00007ffeecd68030 R14: 00007ffeecd68060 R15: 00007ffeecd683c0 [ 28.922202] [ 28.922514] [ 28.922744] Allocated by task 213: [ 28.923201] kasan_save_stack+0x22/0x50 [ 28.923739] kasan_set_track+0x25/0x30 [ 28.924271] __kasan_slab_alloc+0x59/0x70 [ 28.924827] kmem_cache_alloc+0x16b/0x370 [ 28.925392] vm_area_dup+0x20/0x160 [ 28.925885] __split_vma+0x170/0x950 [ 28.926382] split_vma+0xc6/0x110 [ 28.926856] mprotect_fixup+0x8d2/0xb30 [ 28.927385] do_mprotect_pkey+0x87e/0xd40 [ 28.927940] __x64_sys_mprotect+0x78/0xc0 [ 28.928488] do_syscall_64+0x3f/0x90 [ 28.929007] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.929694] [ 28.929925] Freed by task 213: [ 28.930344] kasan_save_stack+0x22/0x50 [ 28.930876] kasan_set_track+0x25/0x30 [ 28.931407] kasan_save_free_info+0x2b/0x50 [ 28.931981] __kasan_slab_free+0x10a/0x190 [ 28.932549] kmem_cache_free+0x10d/0x4d0 [ 28.933112] rcu_core+0x8c8/0x2860 [ 28.933586] __do_softirq+0x1b7/0x7d4 [ 28.934100] [ 28.934326] Last potentially related work creation: [ 28.934955] kasan_save_stack+0x22/0x50 [ 28.935492] __kasan_record_aux_stack+0x8e/0xa0 [ 28.936102] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.936792] remove_vma+0x139/0x170 [ 28.937287] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.937874] do_vmi_munmap+0x1f1/0x2b0 [ 28.938389] __vm_munmap+0x138/0x3a0 [ 28.938920] __x64_sys_munmap+0x59/0x80 [ 28.939457] do_syscall_64+0x3f/0x90 [ 28.939969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.940660] [ 28.940890] The buggy address belongs to the object at ffff8880197253a0 [ 28.940890] which belongs to the cache vm_area_struct of size 168 [ 28.942472] The buggy address is located 88 bytes inside of [ 28.942472] freed 168-byte region [ffff8880197253a0, ffff888019725448) [ 28.943988] [ 28.944222] The buggy address belongs to the physical page: [ 28.944924] page:00000000cdf6078b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19725 [ 28.946134] memcg:ffff88800e0cde01 [ 28.946590] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.947295] page_type: 0xffffffff() [ 28.947773] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.948753] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0cde01 [ 28.949733] page dumped because: kasan: bad access detected [ 28.950437] [ 28.950675] Memory state around the buggy address: [ 28.951306] ffff888019725280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 28.952231] ffff888019725300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 28.953162] >ffff888019725380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 28.954073] ^ [ 28.954977] ffff888019725400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 28.955906] ffff888019725480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.956826] ================================================================== [ 28.958083] Disabling lock debugging due to kernel taint [ 30.930083] BUG: Bad rss-counter state mm:00000000094c0fa8 type:MM_FILEPAGES val:33 [ 30.931266] BUG: Bad rss-counter state mm:00000000094c0fa8 type:MM_ANONPAGES val:22 [ 31.347574] BUG: Bad rss-counter state mm:0000000088f17dc2 type:MM_FILEPAGES val:33 [ 31.348781] BUG: Bad rss-counter state mm:0000000088f17dc2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17186' (ECDSA) to the list of known hosts. 2023/06/20 22:49:30 fuzzer started 2023/06/20 22:49:30 dialing manager at localhost:36067 2023/06/20 22:49:30 checking machine... 2023/06/20 22:49:30 checking revisions... [ 32.040479] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:49:30 testing simple program... [ 32.094874] cgroup: Unknown subsys name 'net' [ 32.134134] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:49:30 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8180c705 RCX=ffffffff86138e01 RDX=1ffff1100d9c135e RSI=0000000000000000 RDI=ffffffff8180c705 RBP=ffffffff8180c705 RSP=ffff88806ce09a48 R8 =ffffffff86138e90 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8f R12=0000000000000001 R13=0000000000000000 R14=ffff88800fbb0000 R15=ffff88800e66dc60 RIP=ffffffff811fc772 RFL=00000287 [--S--PC] 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 00007f181fe13900 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=00007f18203c8650 CR3=000000000a04c000 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=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11001ff5462 RSI=ffffffff81acaf1b RDI=ffff88800ffaa310 RBP=ffff88800ffaa000 RSP=ffff888014737920 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800ffaa600 R13=ffff88800ffac380 R14=0000000000000001 R15=000000000000171f RIP=ffffffff81acaf37 RFL=00000212 [----A--] 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 00007f418ccd1900 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=00007f418c108630 CR3=000000000c814000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5faecb87e106d90b00000000000ae988 XMM05=88c71878357d514c0000000000133040 XMM06=e4cb8bb95a7664b60000000000131ed8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000