syzkaller login: [ 31.774616] BUG: Bad rss-counter state mm:000000002358fa64 type:MM_FILEPAGES val:33 [ 31.776021] BUG: Bad rss-counter state mm:000000002358fa64 type:MM_ANONPAGES val:22 [ 31.822540] ================================================================== [ 31.823444] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.824379] Read of size 8 at addr ffff888019c643f8 by task sshd/220 [ 31.825143] [ 31.825360] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.826211] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.827179] Call Trace: [ 31.827495] [ 31.827779] dump_stack_lvl+0x91/0xf0 [ 31.828269] print_report+0xcc/0x620 [ 31.828750] ? __virt_addr_valid+0x102/0x340 [ 31.829499] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.830114] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.830732] kasan_report+0xbe/0xf0 [ 31.831217] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.831844] vma_interval_tree_remove+0xc75/0xec0 [ 31.832447] vma_prepare+0xc54/0x11a0 [ 31.832950] __split_vma+0x5af/0x950 [ 31.833426] ? __pfx___split_vma+0x10/0x10 [ 31.833959] ? find_held_lock+0x2c/0x110 [ 31.834475] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.835040] ? lock_is_held_type+0x9f/0x120 [ 31.835575] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.836176] ? mtree_range_walk+0x632/0x900 [ 31.836724] ? mas_walk+0x5c7/0x7c0 [ 31.837209] do_vmi_munmap+0x1f1/0x2b0 [ 31.837699] mmap_region+0x1f9/0x2660 [ 31.838178] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.838691] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.839397] ? __pfx_lock_acquire+0x10/0x10 [ 31.839925] ? __pfx_mmap_region+0x10/0x10 [ 31.840455] ? security_mmap_addr+0x7d/0xa0 [ 31.841004] ? get_unmapped_area+0x1f5/0x3f0 [ 31.841553] do_mmap+0x854/0xf00 [ 31.841987] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.842477] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.843040] ksys_mmap_pgoff+0x3af/0x500 [ 31.843544] do_syscall_64+0x3f/0x90 [ 31.844019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.844660] RIP: 0033:0x7fb956316d82 [ 31.845133] 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 [ 31.847231] RSP: 002b:00007fff77e2a138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.848124] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb956316d82 [ 31.848970] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb955750000 [ 31.849812] RBP: 00007fb955750000 R08: 0000000000000009 R09: 0000000000001000 [ 31.850645] R10: 0000000000000812 R11: 0000000000000206 R12: 00005631cb3fcf70 [ 31.851490] R13: 00007fff77e2a150 R14: 00007fff77e2a180 R15: 00007fff77e2a4e0 [ 31.852342] [ 31.852638] [ 31.852871] Allocated by task 213: [ 31.853295] kasan_save_stack+0x22/0x50 [ 31.853796] kasan_set_track+0x25/0x30 [ 31.854286] __kasan_slab_alloc+0x59/0x70 [ 31.854816] kmem_cache_alloc+0x16b/0x370 [ 31.855334] vm_area_dup+0x20/0x160 [ 31.855797] __split_vma+0x170/0x950 [ 31.856261] split_vma+0xc6/0x110 [ 31.856698] mprotect_fixup+0x8d2/0xb30 [ 31.857206] do_mprotect_pkey+0x87e/0xd40 [ 31.857723] __x64_sys_mprotect+0x78/0xc0 [ 31.858245] do_syscall_64+0x3f/0x90 [ 31.858721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.859362] [ 31.859580] Freed by task 213: [ 31.859974] kasan_save_stack+0x22/0x50 [ 31.860475] kasan_set_track+0x25/0x30 [ 31.860974] kasan_save_free_info+0x2b/0x50 [ 31.861502] __kasan_slab_free+0x10a/0x190 [ 31.862030] kmem_cache_free+0x10d/0x4d0 [ 31.862533] rcu_core+0x8c8/0x2860 [ 31.862978] __do_softirq+0x1b7/0x7d4 [ 31.863461] [ 31.863674] Last potentially related work creation: [ 31.864259] kasan_save_stack+0x22/0x50 [ 31.864778] __kasan_record_aux_stack+0x8e/0xa0 [ 31.865360] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.866002] remove_vma+0x139/0x170 [ 31.866451] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.867004] do_vmi_munmap+0x1f1/0x2b0 [ 31.867489] __vm_munmap+0x138/0x3a0 [ 31.867958] __x64_sys_munmap+0x59/0x80 [ 31.868455] do_syscall_64+0x3f/0x90 [ 31.868941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.869587] [ 31.869805] The buggy address belongs to the object at ffff888019c643a0 [ 31.869805] which belongs to the cache vm_area_struct of size 168 [ 31.871364] The buggy address is located 88 bytes inside of [ 31.871364] freed 168-byte region [ffff888019c643a0, ffff888019c64448) [ 31.872785] [ 31.873006] The buggy address belongs to the physical page: [ 31.873658] page:000000008f3cbc4d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c64 [ 31.874736] memcg:ffff88801607bf01 [ 31.875159] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.875797] page_type: 0xffffffff() [ 31.876250] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.877179] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801607bf01 [ 31.878079] page dumped because: kasan: bad access detected [ 31.878742] [ 31.878960] Memory state around the buggy address: [ 31.879533] ffff888019c64280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.880381] ffff888019c64300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.881246] >ffff888019c64380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.882096] ^ [ 31.882934] ffff888019c64400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.883785] ffff888019c64480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.884628] ================================================================== [ 31.885553] Disabling lock debugging due to kernel taint [ 33.848245] BUG: Bad rss-counter state mm:00000000bb12e758 type:MM_FILEPAGES val:33 [ 33.849501] BUG: Bad rss-counter state mm:00000000bb12e758 type:MM_ANONPAGES val:22 [ 34.505465] BUG: Bad rss-counter state mm:00000000d182b5ef type:MM_FILEPAGES val:33 [ 34.506632] BUG: Bad rss-counter state mm:00000000d182b5ef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2354' (ECDSA) to the list of known hosts. 2023/06/20 11:59:42 fuzzer started 2023/06/20 11:59:42 dialing manager at localhost:36067 2023/06/20 11:59:42 checking machine... 2023/06/20 11:59:42 checking revisions... [ 35.150253] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:59:43 testing simple program... [ 35.204687] cgroup: Unknown subsys name 'net' [ 35.240972] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:59:42 Registers: info registers vcpu 0 RAX=010000000000201d RBX=ffff888013ec8000 RCX=ffffffff818348ac RDX=fffff940000c65b1 RSI=0000000000000008 RDI=ffffea0000632d80 RBP=ffff88801592fb50 RSP=ffff88801592fb00 R8 =0000000000000000 R9 =fffff940000c65b0 R10=ffffea0000632d87 R11=0000000000000000 R12=dffffc0000000000 R13=fffff940000c65b0 R14=1ffffd40000c65b7 R15=ffff888016a8f398 RIP=ffffffff818348d5 RFL=00000286 [--S--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff64a447900 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=00007ff649896d10 CR3=000000000ec5c000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b7c15038be114f4900000000000ae988 XMM05=7a551bf6713cf67c0000000000132a18 XMM06=19e9129bd510f23500000000001318c0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=1ffff11001dfbee2 RCX=ffffffff81f04b42 RDX=ffff888015be9b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff88800efdf700 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000005 R13=0000000020000000 R14=0000000000000000 R15=0000000000000000 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 00007fbcce5d3900 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=00007ffd65778000 CR3=00000000180a8000 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=6720646572637465733a4d41503d706f 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