syzkaller login: [ 31.415252] BUG: Bad rss-counter state mm:00000000c3b4428d type:MM_FILEPAGES val:33 [ 31.416407] BUG: Bad rss-counter state mm:00000000c3b4428d type:MM_ANONPAGES val:22 [ 31.543414] ================================================================== [ 31.544049] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.544650] Read of size 8 at addr ffff888016800880 by task sshd/220 [ 31.545155] [ 31.545294] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.545884] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.546506] Call Trace: [ 31.546707] [ 31.546896] dump_stack_lvl+0x91/0xf0 [ 31.547234] print_report+0xcc/0x620 [ 31.547563] ? __virt_addr_valid+0x102/0x340 [ 31.548201] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.548619] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.549019] kasan_report+0xbe/0xf0 [ 31.549348] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.549851] vma_interval_tree_remove+0xc75/0xec0 [ 31.550342] vma_prepare+0xc54/0x11a0 [ 31.550707] __split_vma+0x5af/0x950 [ 31.551026] ? __pfx___split_vma+0x10/0x10 [ 31.551362] ? find_held_lock+0x2c/0x110 [ 31.551704] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.552068] ? lock_is_held_type+0x9f/0x120 [ 31.552420] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.552819] ? mtree_range_walk+0x632/0x900 [ 31.553212] ? mas_walk+0x5c7/0x7c0 [ 31.553532] do_vmi_munmap+0x1f1/0x2b0 [ 31.553908] mmap_region+0x1f9/0x2660 [ 31.554249] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.554612] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.555074] ? __pfx_lock_acquire+0x10/0x10 [ 31.555421] ? __pfx_mmap_region+0x10/0x10 [ 31.555781] ? security_mmap_addr+0x7d/0xa0 [ 31.556144] ? get_unmapped_area+0x1f5/0x3f0 [ 31.556501] do_mmap+0x854/0xf00 [ 31.556796] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.557145] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.557504] ksys_mmap_pgoff+0x3af/0x500 [ 31.557894] do_syscall_64+0x3f/0x90 [ 31.558242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.558697] RIP: 0033:0x7f906c29dd82 [ 31.559021] 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 [ 31.560469] RSP: 002b:00007ffcec1ddfa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.561086] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f906c29dd82 [ 31.561644] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f906b6d7000 [ 31.562248] RBP: 00007f906b6d7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.562812] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f12cf14ec0 [ 31.563379] R13: 00007ffcec1ddfc0 R14: 00007ffcec1ddff0 R15: 00007ffcec1de350 [ 31.563964] [ 31.564164] [ 31.564311] Allocated by task 213: [ 31.564594] kasan_save_stack+0x22/0x50 [ 31.564978] kasan_set_track+0x25/0x30 [ 31.565305] __kasan_slab_alloc+0x59/0x70 [ 31.565661] kmem_cache_alloc+0x16b/0x370 [ 31.566083] vm_area_dup+0x20/0x160 [ 31.566402] __split_vma+0x170/0x950 [ 31.566734] split_vma+0xc6/0x110 [ 31.567036] mprotect_fixup+0x8d2/0xb30 [ 31.567374] do_mprotect_pkey+0x87e/0xd40 [ 31.567738] __x64_sys_mprotect+0x78/0xc0 [ 31.568109] do_syscall_64+0x3f/0x90 [ 31.568451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.568902] [ 31.569068] Freed by task 213: [ 31.569345] kasan_save_stack+0x22/0x50 [ 31.569734] kasan_set_track+0x25/0x30 [ 31.570082] kasan_save_free_info+0x2b/0x50 [ 31.570445] __kasan_slab_free+0x10a/0x190 [ 31.570797] kmem_cache_free+0x10d/0x4d0 [ 31.571140] rcu_core+0x8c8/0x2860 [ 31.571448] __do_softirq+0x1b7/0x7d4 [ 31.571782] [ 31.571941] Last potentially related work creation: [ 31.572361] kasan_save_stack+0x22/0x50 [ 31.572714] __kasan_record_aux_stack+0x8e/0xa0 [ 31.573120] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.573592] remove_vma+0x139/0x170 [ 31.573964] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.574336] do_vmi_munmap+0x1f1/0x2b0 [ 31.574675] __vm_munmap+0x138/0x3a0 [ 31.575012] __x64_sys_munmap+0x59/0x80 [ 31.575355] do_syscall_64+0x3f/0x90 [ 31.575686] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.576124] [ 31.576267] The buggy address belongs to the object at ffff888016800828 [ 31.576267] which belongs to the cache vm_area_struct of size 168 [ 31.577305] The buggy address is located 88 bytes inside of [ 31.577305] freed 168-byte region [ffff888016800828, ffff8880168008d0) [ 31.578273] [ 31.578414] The buggy address belongs to the physical page: [ 31.578856] page:000000008fdb4b12 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16800 [ 31.579612] memcg:ffff88801a0b6001 [ 31.579904] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.580319] page_type: 0xffffffff() [ 31.580623] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.581282] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a0b6001 [ 31.581915] page dumped because: kasan: bad access detected [ 31.582352] [ 31.582492] Memory state around the buggy address: [ 31.582883] ffff888016800780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.583458] ffff888016800800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.584047] >ffff888016800880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.584618] ^ [ 31.584895] ffff888016800900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.585478] ffff888016800980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.586090] ================================================================== [ 31.586770] Disabling lock debugging due to kernel taint [ 33.449515] BUG: Bad rss-counter state mm:00000000a89de5b3 type:MM_FILEPAGES val:33 [ 33.450284] BUG: Bad rss-counter state mm:00000000a89de5b3 type:MM_ANONPAGES val:22 [ 33.823750] BUG: Bad rss-counter state mm:0000000048b8ba5b type:MM_FILEPAGES val:33 [ 33.824515] BUG: Bad rss-counter state mm:0000000048b8ba5b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64297' (ECDSA) to the list of known hosts. 2023/06/21 09:00:21 fuzzer started 2023/06/21 09:00:21 dialing manager at localhost:36067 2023/06/21 09:00:21 checking machine... 2023/06/21 09:00:21 checking revisions... [ 34.405921] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:00:21 testing simple program... [ 34.454283] cgroup: Unknown subsys name 'net' [ 34.513132] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:00:20 Registers: info registers vcpu 0 RAX=0000000080010001 RBX=0000000000000000 RCX=0000000000000000 RDX=ffffffff8542a6c0 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88806ce34b60 RSP=ffff88806ce09d68 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806ce09ff8 R12=0000000000000000 R13=ffff88806ce39518 R14=0000000000000000 R15=ffffffff8542a6c0 RIP=ffffffff815d97f5 RFL=00000002 [-------] 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=00007f2ed0778c70 CR3=000000000f608000 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=733af8d625bae1b9184d298d5240c04a XMM02=000000000011a478ec2efd57dc4c00df XMM03=00000000001219b898c60a5afa8ac723 XMM04=28b7b459cb27d47900000000000ae988 XMM05=19e9129bd510f2350000000000131770 XMM06=8bdf9467121f846900000000001305d8 XMM07=e042d86d42eb936e0000000000121c38 XMM08=98c60a5afa8ac723000000000011a4d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=00007faec12a8000 RCX=ffffffff817088b9 RDX=00007faec12a8000 RSI=0000000080000000 RDI=0000000000000007 RBP=00007faec128c000 RSP=ffff888015adf940 R8 =0000000000000007 R9 =0000000000000000 R10=00007faec12a8000 R11=0000000000000000 R12=dffffc0000000000 R13=0000000000000000 R14=ffff888015adfaf8 R15=00007faec128c000 RIP=ffffffff814c0252 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 00007faec12bc900 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=00007faec129b020 CR3=000000001ca14000 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