syzkaller login: [ 30.394391] BUG: Bad rss-counter state mm:00000000f9ee402b type:MM_FILEPAGES val:33 [ 30.395667] BUG: Bad rss-counter state mm:00000000f9ee402b type:MM_ANONPAGES val:22 [ 30.548342] ================================================================== [ 30.549261] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.550218] Read of size 8 at addr ffff88800d396968 by task sshd/219 [ 30.551185] [ 30.551430] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.552301] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.553292] Call Trace: [ 30.553639] [ 30.553940] dump_stack_lvl+0x91/0xf0 [ 30.554450] print_report+0xcc/0x620 [ 30.554936] ? __virt_addr_valid+0x102/0x340 [ 30.555486] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.556099] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.556716] kasan_report+0xbe/0xf0 [ 30.557188] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.557807] vma_interval_tree_remove+0xc75/0xec0 [ 30.558429] vma_prepare+0xc54/0x11a0 [ 30.558913] __split_vma+0x5af/0x950 [ 30.559396] ? __pfx___split_vma+0x10/0x10 [ 30.559927] ? find_held_lock+0x2c/0x110 [ 30.560445] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.561002] ? lock_is_held_type+0x9f/0x120 [ 30.561548] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.562152] ? mtree_range_walk+0x632/0x900 [ 30.562712] ? mas_walk+0x5c7/0x7c0 [ 30.563187] do_vmi_munmap+0x1f1/0x2b0 [ 30.563679] mmap_region+0x1f9/0x2660 [ 30.564159] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.564673] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.565381] ? __pfx_lock_acquire+0x10/0x10 [ 30.565906] ? __pfx_mmap_region+0x10/0x10 [ 30.566448] ? security_mmap_addr+0x7d/0xa0 [ 30.566978] ? get_unmapped_area+0x1f5/0x3f0 [ 30.567521] do_mmap+0x854/0xf00 [ 30.567961] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.568458] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.569018] ksys_mmap_pgoff+0x3af/0x500 [ 30.569524] do_syscall_64+0x3f/0x90 [ 30.570003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.570662] RIP: 0033:0x7f69c59e4d82 [ 30.571121] 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 [ 30.573259] RSP: 002b:00007ffde73be628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.574170] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f69c59e4d82 [ 30.575039] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f69c4e1e000 [ 30.575887] RBP: 00007f69c4e1e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.576725] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e85e086ec0 [ 30.577566] R13: 00007ffde73be640 R14: 00007ffde73be670 R15: 00007ffde73be9d0 [ 30.578423] [ 30.578719] [ 30.578933] Allocated by task 212: [ 30.579365] kasan_save_stack+0x22/0x50 [ 30.579870] kasan_set_track+0x25/0x30 [ 30.580367] __kasan_slab_alloc+0x59/0x70 [ 30.580888] kmem_cache_alloc+0x16b/0x370 [ 30.581403] vm_area_dup+0x20/0x160 [ 30.581854] __split_vma+0x170/0x950 [ 30.582317] split_vma+0xc6/0x110 [ 30.582783] mprotect_fixup+0x8d2/0xb30 [ 30.583283] do_mprotect_pkey+0x87e/0xd40 [ 30.583804] __x64_sys_mprotect+0x78/0xc0 [ 30.584323] do_syscall_64+0x3f/0x90 [ 30.584795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.585433] [ 30.585646] Freed by task 202: [ 30.586033] kasan_save_stack+0x22/0x50 [ 30.586544] kasan_set_track+0x25/0x30 [ 30.587037] kasan_save_free_info+0x2b/0x50 [ 30.587566] __kasan_slab_free+0x10a/0x190 [ 30.588098] kmem_cache_free+0x10d/0x4d0 [ 30.588643] rcu_core+0x8c8/0x2860 [ 30.589112] __do_softirq+0x1b7/0x7d4 [ 30.589615] [ 30.589829] Last potentially related work creation: [ 30.590454] kasan_save_stack+0x22/0x50 [ 30.590958] __kasan_record_aux_stack+0x8e/0xa0 [ 30.591531] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.592169] remove_vma+0x139/0x170 [ 30.592615] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.593204] do_vmi_munmap+0x1f1/0x2b0 [ 30.593687] __vm_munmap+0x138/0x3a0 [ 30.594145] __x64_sys_munmap+0x59/0x80 [ 30.594646] do_syscall_64+0x3f/0x90 [ 30.595120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.595756] [ 30.595968] The buggy address belongs to the object at ffff88800d396910 [ 30.595968] which belongs to the cache vm_area_struct of size 168 [ 30.597423] The buggy address is located 88 bytes inside of [ 30.597423] freed 168-byte region [ffff88800d396910, ffff88800d3969b8) [ 30.598811] [ 30.599029] The buggy address belongs to the physical page: [ 30.599681] page:000000000e3d8fc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd396 [ 30.600759] memcg:ffff8880169c1701 [ 30.601177] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.601819] page_type: 0xffffffff() [ 30.602267] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.603199] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169c1701 [ 30.604088] page dumped because: kasan: bad access detected [ 30.604741] [ 30.604953] Memory state around the buggy address: [ 30.605525] ffff88800d396800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.606412] ffff88800d396880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.607287] >ffff88800d396900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.608136] ^ [ 30.608920] ffff88800d396980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.609779] ffff88800d396a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.610640] ================================================================== [ 30.611575] Disabling lock debugging due to kernel taint [ 32.787289] BUG: Bad rss-counter state mm:000000006698a5e6 type:MM_FILEPAGES val:33 [ 32.788477] BUG: Bad rss-counter state mm:000000006698a5e6 type:MM_ANONPAGES val:22 [ 33.276238] BUG: Bad rss-counter state mm:00000000d695a0c5 type:MM_FILEPAGES val:33 [ 33.277401] BUG: Bad rss-counter state mm:00000000d695a0c5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4839' (ECDSA) to the list of known hosts. 2023/06/20 23:03:55 fuzzer started 2023/06/20 23:03:55 dialing manager at localhost:36067 2023/06/20 23:03:55 checking machine... 2023/06/20 23:03:55 checking revisions... [ 33.913538] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:03:56 testing simple program... [ 33.968975] cgroup: Unknown subsys name 'net' [ 34.020241] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:03:55 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000002 RCX=00007f85485283ff RDX=0000556a5a9e4788 RSI=0000000000000001 RDI=0000000000000000 RBP=0000000000000058 RSP=00007f85480a3d18 R8 =0000000000000000 R9 =0000556a5af25e88 R10=0000000000000000 R11=0000000000000000 R12=0000000000000001 R13=00007f8540000b80 R14=0000556a5a9e4a50 R15=00007f8548177840 RIP=0000556a5a96a037 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f85480a4700 00000000 00000000 GS =0000 0000000000000000 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=00007fffb27d79f8 CR3=000000000fe62000 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=33303a3332203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732035353a3330 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303936 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff88800fdc51c0 RCX=0000000000000000 RDX=1ffff11001fb8b0b RSI=ffffffff8171b1d9 RDI=ffff88800fdc5858 RBP=0000000000000000 RSP=ffff8880166dfe70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00007ff20acc2044 R14=0000000000000000 R15=0000000000000040 RIP=ffffffff814c086b RFL=00000282 [--S----] 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 00007ff20a16e900 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=00007ff20acc2044 CR3=000000000d998000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000000000000000000000000000ff XMM05=000000000000000000000000000000ff XMM06=1f6163696d72657420322e322e2f2b00 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000