syzkaller login: [ 31.121199] BUG: Bad rss-counter state mm:0000000018e8fb4e type:MM_FILEPAGES val:33 [ 31.122429] BUG: Bad rss-counter state mm:0000000018e8fb4e type:MM_ANONPAGES val:22 [ 31.161328] ================================================================== [ 31.162394] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.163497] Read of size 8 at addr ffff88800daeb5c8 by task sshd/219 [ 31.164395] [ 31.164615] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.165572] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.166682] Call Trace: [ 31.167074] [ 31.167361] dump_stack_lvl+0x91/0xf0 [ 31.167866] print_report+0xcc/0x620 [ 31.168361] ? __virt_addr_valid+0x102/0x340 [ 31.168913] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.169525] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.170158] kasan_report+0xbe/0xf0 [ 31.170640] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.171376] vma_interval_tree_remove+0xc75/0xec0 [ 31.171956] vma_prepare+0xc54/0x11a0 [ 31.172417] __split_vma+0x5af/0x950 [ 31.172871] ? __pfx___split_vma+0x10/0x10 [ 31.173381] ? find_held_lock+0x2c/0x110 [ 31.173892] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.174438] ? lock_is_held_type+0x9f/0x120 [ 31.174989] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.175605] ? mtree_range_walk+0x632/0x900 [ 31.176158] ? mas_walk+0x5c7/0x7c0 [ 31.176635] do_vmi_munmap+0x1f1/0x2b0 [ 31.177129] mmap_region+0x1f9/0x2660 [ 31.177610] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.178107] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.178800] ? __pfx_lock_acquire+0x10/0x10 [ 31.179318] ? __pfx_mmap_region+0x10/0x10 [ 31.179829] ? security_mmap_addr+0x7d/0xa0 [ 31.180345] ? get_unmapped_area+0x1f5/0x3f0 [ 31.180876] do_mmap+0x854/0xf00 [ 31.181298] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.181797] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.182340] ksys_mmap_pgoff+0x3af/0x500 [ 31.182828] do_syscall_64+0x3f/0x90 [ 31.183293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.183919] RIP: 0033:0x7f04b1b14d82 [ 31.184358] 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 [ 31.186486] RSP: 002b:00007ffe7bc04e78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.187390] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f04b1b14d82 [ 31.188213] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f04b0f4e000 [ 31.189029] RBP: 00007f04b0f4e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.189878] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557154437d90 [ 31.190739] R13: 00007ffe7bc04e90 R14: 00007ffe7bc04ec0 R15: 00007ffe7bc05220 [ 31.191609] [ 31.191901] [ 31.192119] Allocated by task 212: [ 31.192551] kasan_save_stack+0x22/0x50 [ 31.193045] kasan_set_track+0x25/0x30 [ 31.193526] __kasan_slab_alloc+0x59/0x70 [ 31.194040] kmem_cache_alloc+0x16b/0x370 [ 31.194544] vm_area_dup+0x20/0x160 [ 31.195009] __split_vma+0x170/0x950 [ 31.195465] split_vma+0xc6/0x110 [ 31.195899] mprotect_fixup+0x8d2/0xb30 [ 31.196390] do_mprotect_pkey+0x87e/0xd40 [ 31.196901] __x64_sys_mprotect+0x78/0xc0 [ 31.197409] do_syscall_64+0x3f/0x90 [ 31.197878] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.198509] [ 31.198724] Freed by task 212: [ 31.199115] kasan_save_stack+0x22/0x50 [ 31.199608] kasan_set_track+0x25/0x30 [ 31.200091] kasan_save_free_info+0x2b/0x50 [ 31.200610] __kasan_slab_free+0x10a/0x190 [ 31.201124] kmem_cache_free+0x10d/0x4d0 [ 31.201620] rcu_core+0x8c8/0x2860 [ 31.202067] __do_softirq+0x1b7/0x7d4 [ 31.202533] [ 31.202743] Last potentially related work creation: [ 31.203308] kasan_save_stack+0x22/0x50 [ 31.203799] __kasan_record_aux_stack+0x8e/0xa0 [ 31.204359] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.205002] remove_vma+0x139/0x170 [ 31.205455] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.206024] do_vmi_munmap+0x1f1/0x2b0 [ 31.206540] __vm_munmap+0x138/0x3a0 [ 31.207010] __x64_sys_munmap+0x59/0x80 [ 31.207508] do_syscall_64+0x3f/0x90 [ 31.207971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.208608] [ 31.208820] Second to last potentially related work creation: [ 31.209479] kasan_save_stack+0x22/0x50 [ 31.210002] __kasan_record_aux_stack+0x8e/0xa0 [ 31.210565] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.211192] remove_vma+0x139/0x170 [ 31.211633] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.212179] do_vmi_munmap+0x1f1/0x2b0 [ 31.212656] mmap_region+0x1f9/0x2660 [ 31.213117] do_mmap+0x854/0xf00 [ 31.213535] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.214013] ksys_mmap_pgoff+0x7d/0x500 [ 31.214491] do_syscall_64+0x3f/0x90 [ 31.214966] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.215623] [ 31.215838] The buggy address belongs to the object at ffff88800daeb570 [ 31.215838] which belongs to the cache vm_area_struct of size 168 [ 31.217307] The buggy address is located 88 bytes inside of [ 31.217307] freed 168-byte region [ffff88800daeb570, ffff88800daeb618) [ 31.218723] [ 31.218941] The buggy address belongs to the physical page: [ 31.219600] page:0000000075739a55 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdaeb [ 31.220667] memcg:ffff88800b397301 [ 31.221086] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.221711] page_type: 0xffffffff() [ 31.222160] raw: 0100000000000200 ffff8880087a0c80 ffffea0000398d00 dead000000000006 [ 31.223059] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b397301 [ 31.223937] page dumped because: kasan: bad access detected [ 31.224580] [ 31.224788] Memory state around the buggy address: [ 31.225354] ffff88800daeb480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.226198] ffff88800daeb500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.227034] >ffff88800daeb580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.227850] ^ [ 31.228491] ffff88800daeb600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.229319] ffff88800daeb680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.230151] ================================================================== [ 31.231057] Disabling lock debugging due to kernel taint [ 33.907546] BUG: Bad rss-counter state mm:00000000dc75310a type:MM_FILEPAGES val:33 [ 33.908491] BUG: Bad rss-counter state mm:00000000dc75310a type:MM_ANONPAGES val:22 [ 34.372315] BUG: Bad rss-counter state mm:00000000b0c194eb type:MM_FILEPAGES val:33 [ 34.373278] BUG: Bad rss-counter state mm:00000000b0c194eb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54398' (ECDSA) to the list of known hosts. 2023/06/20 16:19:51 fuzzer started 2023/06/20 16:19:51 dialing manager at localhost:36067 2023/06/20 16:19:51 checking machine... 2023/06/20 16:19:51 checking revisions... [ 35.128226] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:19:51 testing simple program... [ 35.174876] cgroup: Unknown subsys name 'net' [ 35.229077] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:19:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff814c856d RDX=ffffffff8542a6c0 RSI=0000000000000100 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=ffff888016a0db30 RIP=ffffffff814c0860 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 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=00007f2641d1c008 CR3=000000000949e000 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=2031353a39313a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a39313a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000001 RCX=ffffffff844a9ccb RDX=ffff88800f2ad1c0 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800e96dc00 RSP=ffff88801a00fb18 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=0000000000000000 R13=dffffc0000000000 R14=ffff88800e96dc80 R15=ffff88801a00fe70 RIP=ffffffff814c086b 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 00007ff30529b900 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=00007ff305245008 CR3=000000000ebca000 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=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