syzkaller login: [ 45.032500] BUG: Bad rss-counter state mm:00000000da7c65eb type:MM_FILEPAGES val:33 [ 45.034003] BUG: Bad rss-counter state mm:00000000da7c65eb type:MM_ANONPAGES val:22 [ 45.183598] ================================================================== [ 45.184701] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.185837] Read of size 8 at addr ffff88801c037140 by task sshd/220 [ 45.186928] [ 45.187195] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.188233] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.189419] Call Trace: [ 45.189797] [ 45.190098] dump_stack_lvl+0x91/0xf0 [ 45.190632] print_report+0xcc/0x620 [ 45.191152] ? __virt_addr_valid+0x102/0x340 [ 45.191738] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.192392] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.193047] kasan_report+0xbe/0xf0 [ 45.193570] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.194236] vma_interval_tree_remove+0xc75/0xec0 [ 45.194882] vma_prepare+0xc54/0x11a0 [ 45.195396] __split_vma+0x5af/0x950 [ 45.195903] ? __pfx___split_vma+0x10/0x10 [ 45.196474] ? find_held_lock+0x2c/0x110 [ 45.197023] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.197632] ? lock_is_held_type+0x9f/0x120 [ 45.198209] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.198891] ? mtree_range_walk+0x632/0x900 [ 45.199571] ? mas_walk+0x5c7/0x7c0 [ 45.200084] do_vmi_munmap+0x1f1/0x2b0 [ 45.200618] mmap_region+0x1f9/0x2660 [ 45.201150] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.201743] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.202554] ? __pfx_lock_acquire+0x10/0x10 [ 45.203147] ? __pfx_mmap_region+0x10/0x10 [ 45.203739] ? security_mmap_addr+0x7d/0xa0 [ 45.204333] ? get_unmapped_area+0x1f5/0x3f0 [ 45.204942] do_mmap+0x854/0xf00 [ 45.205415] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.205944] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.206547] ksys_mmap_pgoff+0x3af/0x500 [ 45.207085] do_syscall_64+0x3f/0x90 [ 45.207595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.208286] RIP: 0033:0x7f707775bd82 [ 45.208774] 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 [ 45.211049] RSP: 002b:00007ffdecea7c38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.212019] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f707775bd82 [ 45.212925] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7076b95000 [ 45.213839] RBP: 00007f7076b95000 R08: 0000000000000009 R09: 0000000000001000 [ 45.214746] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558774462d90 [ 45.215647] R13: 00007ffdecea7c50 R14: 00007ffdecea7c80 R15: 00007ffdecea7fe0 [ 45.216559] [ 45.216870] [ 45.217100] Allocated by task 213: [ 45.217569] kasan_save_stack+0x22/0x50 [ 45.218118] kasan_set_track+0x25/0x30 [ 45.218711] __kasan_slab_alloc+0x59/0x70 [ 45.219400] kmem_cache_alloc+0x16b/0x370 [ 45.220090] vm_area_dup+0x20/0x160 [ 45.220702] __split_vma+0x170/0x950 [ 45.221352] split_vma+0xc6/0x110 [ 45.221926] mprotect_fixup+0x8d2/0xb30 [ 45.222591] do_mprotect_pkey+0x87e/0xd40 [ 45.223280] __x64_sys_mprotect+0x78/0xc0 [ 45.223951] do_syscall_64+0x3f/0x90 [ 45.224581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.225447] [ 45.225724] Freed by task 213: [ 45.226235] kasan_save_stack+0x22/0x50 [ 45.226897] kasan_set_track+0x25/0x30 [ 45.227602] kasan_save_free_info+0x2b/0x50 [ 45.228297] __kasan_slab_free+0x10a/0x190 [ 45.228995] kmem_cache_free+0x10d/0x4d0 [ 45.229685] rcu_core+0x8c8/0x2860 [ 45.230265] __do_softirq+0x1b7/0x7d4 [ 45.230886] [ 45.231170] Last potentially related work creation: [ 45.231957] kasan_save_stack+0x22/0x50 [ 45.232607] __kasan_record_aux_stack+0x8e/0xa0 [ 45.233367] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.234208] remove_vma+0x139/0x170 [ 45.234797] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.235474] do_vmi_munmap+0x1f1/0x2b0 [ 45.235971] __vm_munmap+0x138/0x3a0 [ 45.236467] __x64_sys_munmap+0x59/0x80 [ 45.237003] do_syscall_64+0x3f/0x90 [ 45.237494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.238146] [ 45.238366] The buggy address belongs to the object at ffff88801c0370e8 [ 45.238366] which belongs to the cache vm_area_struct of size 168 [ 45.239841] The buggy address is located 88 bytes inside of [ 45.239841] freed 168-byte region [ffff88801c0370e8, ffff88801c037190) [ 45.241255] [ 45.241503] The buggy address belongs to the physical page: [ 45.242166] page:00000000fa7caec2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1c037 [ 45.243276] memcg:ffff88800da4be01 [ 45.243709] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.244367] page_type: 0xffffffff() [ 45.244828] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 45.245824] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da4be01 [ 45.246788] page dumped because: kasan: bad access detected [ 45.247482] [ 45.247707] Memory state around the buggy address: [ 45.248317] ffff88801c037000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.249232] ffff88801c037080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 45.250144] >ffff88801c037100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.251045] ^ [ 45.251719] ffff88801c037180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 45.252627] ffff88801c037200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 45.253566] ================================================================== [ 45.254634] Disabling lock debugging due to kernel taint [ 47.962968] BUG: Bad rss-counter state mm:00000000d69f270f type:MM_FILEPAGES val:33 [ 47.964220] BUG: Bad rss-counter state mm:00000000d69f270f type:MM_ANONPAGES val:22 [ 48.426003] BUG: Bad rss-counter state mm:00000000c44d9522 type:MM_FILEPAGES val:33 [ 48.427088] BUG: Bad rss-counter state mm:00000000c44d9522 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25389' (ECDSA) to the list of known hosts. 2023/06/19 21:01:58 fuzzer started 2023/06/19 21:01:58 dialing manager at localhost:44161 2023/06/19 21:01:58 checking machine... 2023/06/19 21:01:58 checking revisions... [ 49.121731] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:01:58 testing simple program... [ 49.175278] cgroup: Unknown subsys name 'net' [ 49.226930] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:01:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864b9d56 RDX=1ffff11003083f3a RSI=1ffff11003083f38 RDI=ffff88801841f9d0 RBP=ffff88801841f9aa RSP=ffff88801841f8f8 R8 =ffffffff864b9d5a R9 =ffff88801841f9a8 R10=0000000000038001 R11=00000000000b6996 R12=ffff88801841f9c8 R13=ffff88801841f9b0 R14=ffff88801841ff58 R15=ffff88801841f968 RIP=ffffffff81131892 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 00007fdda53d68c0 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=00007ffc5924ff28 CR3=000000000e5b4000 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=25252525252525252525252525252525 XMM01=00000000000000ff0000000000ff0000 XMM02=00000000000000ff0000000000ff0000 XMM03=000055ba235467a0000055ba23512480 XMM04=ffffffff00000001000055ba235467a0 XMM05=000055ba234fe7f0000055ba235462d0 XMM06=000055ba2352b5400000000400000002 XMM07=00000000000000000000000000000000 XMM08=732f636f72702f006b63616d7300632e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff864b9d5b RBX=0000000000000001 RCX=ffffffff864b9d56 RDX=0000000000000000 RSI=0000000000000000 RDI=1ffffffff0c973ab RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =ffffffff864b9d5a R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b6996 R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09ab9 R15=ffff88806cf09a78 RIP=ffffffff81130aa8 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f19db892900 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=00007fcf78a52650 CR3=0000000014104000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=24f17c339aac32d900000000000ae988 XMM05=960cd8da8267da070000000000135f20 XMM06=19e9129bd510f2350000000000134dd8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000