syzkaller login: [ 31.082521] BUG: Bad rss-counter state mm:0000000015be6d09 type:MM_FILEPAGES val:33 [ 31.084004] BUG: Bad rss-counter state mm:0000000015be6d09 type:MM_ANONPAGES val:22 [ 31.125416] ================================================================== [ 31.126503] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.127519] Read of size 8 at addr ffff888017f85058 by task sshd/220 [ 31.128352] [ 31.128588] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.129526] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.130610] Call Trace: [ 31.130958] [ 31.131266] dump_stack_lvl+0x91/0xf0 [ 31.131804] print_report+0xcc/0x620 [ 31.132332] ? __virt_addr_valid+0x102/0x340 [ 31.132935] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.133609] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.134275] kasan_report+0xbe/0xf0 [ 31.134791] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.135475] vma_interval_tree_remove+0xc75/0xec0 [ 31.136128] vma_prepare+0xc54/0x11a0 [ 31.136650] __split_vma+0x5af/0x950 [ 31.137165] ? __pfx___split_vma+0x10/0x10 [ 31.137748] ? find_held_lock+0x2c/0x110 [ 31.138316] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.138937] ? lock_is_held_type+0x9f/0x120 [ 31.139522] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.140185] ? mtree_range_walk+0x632/0x900 [ 31.140790] ? mas_walk+0x5c7/0x7c0 [ 31.141295] do_vmi_munmap+0x1f1/0x2b0 [ 31.141853] mmap_region+0x1f9/0x2660 [ 31.142378] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.142932] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.143712] ? __pfx_lock_acquire+0x10/0x10 [ 31.144298] ? __pfx_mmap_region+0x10/0x10 [ 31.144872] ? security_mmap_addr+0x7d/0xa0 [ 31.145450] ? get_unmapped_area+0x1f5/0x3f0 [ 31.146064] do_mmap+0x854/0xf00 [ 31.146546] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.147082] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.147701] ksys_mmap_pgoff+0x3af/0x500 [ 31.148253] do_syscall_64+0x3f/0x90 [ 31.148774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.149483] RIP: 0033:0x7f58efb45d82 [ 31.149979] 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 [ 31.152468] RSP: 002b:00007ffecfeb7218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.153456] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f58efb45d82 [ 31.154397] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f58eef7f000 [ 31.155356] RBP: 00007f58eef7f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.156283] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558778e4fec0 [ 31.157203] R13: 00007ffecfeb7230 R14: 00007ffecfeb7260 R15: 00007ffecfeb75c0 [ 31.158154] [ 31.158472] [ 31.158710] Allocated by task 213: [ 31.159175] kasan_save_stack+0x22/0x50 [ 31.159710] kasan_set_track+0x25/0x30 [ 31.160232] __kasan_slab_alloc+0x59/0x70 [ 31.160793] kmem_cache_alloc+0x16b/0x370 [ 31.161359] vm_area_dup+0x20/0x160 [ 31.161863] __split_vma+0x170/0x950 [ 31.162379] split_vma+0xc6/0x110 [ 31.162844] mprotect_fixup+0x8d2/0xb30 [ 31.163376] do_mprotect_pkey+0x87e/0xd40 [ 31.163929] __x64_sys_mprotect+0x78/0xc0 [ 31.164488] do_syscall_64+0x3f/0x90 [ 31.165000] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.165712] [ 31.165938] Freed by task 213: [ 31.166370] kasan_save_stack+0x22/0x50 [ 31.166910] kasan_set_track+0x25/0x30 [ 31.167444] kasan_save_free_info+0x2b/0x50 [ 31.168013] __kasan_slab_free+0x10a/0x190 [ 31.168579] kmem_cache_free+0x10d/0x4d0 [ 31.169124] rcu_core+0x8c8/0x2860 [ 31.169606] __do_softirq+0x1b7/0x7d4 [ 31.170122] [ 31.170361] Last potentially related work creation: [ 31.171005] kasan_save_stack+0x22/0x50 [ 31.171565] __kasan_record_aux_stack+0x8e/0xa0 [ 31.172198] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.172898] remove_vma+0x139/0x170 [ 31.173399] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.174035] do_vmi_munmap+0x1f1/0x2b0 [ 31.174567] __vm_munmap+0x138/0x3a0 [ 31.175084] __x64_sys_munmap+0x59/0x80 [ 31.175626] do_syscall_64+0x3f/0x90 [ 31.176153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.176867] [ 31.177101] The buggy address belongs to the object at ffff888017f85000 [ 31.177101] which belongs to the cache vm_area_struct of size 168 [ 31.178732] The buggy address is located 88 bytes inside of [ 31.178732] freed 168-byte region [ffff888017f85000, ffff888017f850a8) [ 31.180289] [ 31.180524] The buggy address belongs to the physical page: [ 31.181261] page:00000000774c3505 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17f85 [ 31.182480] memcg:ffff88800c43d101 [ 31.182952] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.183666] page_type: 0xffffffff() [ 31.184160] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.185175] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c43d101 [ 31.186192] page dumped because: kasan: bad access detected [ 31.186918] [ 31.187153] Memory state around the buggy address: [ 31.187795] ffff888017f84f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.188727] ffff888017f84f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.189678] >ffff888017f85000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.190620] ^ [ 31.191421] ffff888017f85080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.192368] ffff888017f85100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.193309] ================================================================== [ 31.194473] Disabling lock debugging due to kernel taint [ 33.226661] BUG: Bad rss-counter state mm:00000000a009fe34 type:MM_FILEPAGES val:33 [ 33.227839] BUG: Bad rss-counter state mm:00000000a009fe34 type:MM_ANONPAGES val:22 [ 33.622872] BUG: Bad rss-counter state mm:00000000e4926476 type:MM_FILEPAGES val:33 [ 33.623884] BUG: Bad rss-counter state mm:00000000e4926476 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46705' (ECDSA) to the list of known hosts. 2023/06/21 04:31:07 fuzzer started 2023/06/21 04:31:07 dialing manager at localhost:36067 2023/06/21 04:31:07 checking machine... 2023/06/21 04:31:07 checking revisions... [ 34.295094] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:31:07 testing simple program... [ 34.342320] cgroup: Unknown subsys name 'net' [ 34.409445] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:31:06 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff1100d9c1329 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88806ce09930 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180fea8 RFL=00000256 [---ZAP-] 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=00007f78f87f8518 CR3=000000000cb00000 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=85d35db35dc689824f4c26ced5a097c7 XMM02=ec2efd57dc4c00df000000000011b0d8 XMM03=c3bb3a6040dda693000000000011b1a8 XMM04=663b63fcd4aa716400000000000ae988 XMM05=19e9129bd510f2350000000000131998 XMM06=6c77225262d94a6b0000000000130800 XMM07=e042d86d42eb936e0000000000121da0 XMM08=c3bb3a6040dda693000000000011b1a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800f0d7768 RCX=0000000000000000 RDX=ffff888015e5d1c0 RSI=ffffffff844bd8fc RDI=0000000000000000 RBP=ffff88800f0d79cc RSP=ffff88800f0d7170 R8 =0000000000000000 R9 =000000000000000a R10=0000000000000005 R11=000055ea1ff65000 R12=000000000000000a R13=0000000000000000 R14=dffffc0000000000 R15=0000000000000005 RIP=ffffffff814c089b 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 00007f27e33be900 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=00007f27e339d020 CR3=0000000015c08000 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