syzkaller login: [ 30.684114] BUG: Bad rss-counter state mm:000000007d29caff type:MM_FILEPAGES val:33 [ 30.685567] BUG: Bad rss-counter state mm:000000007d29caff type:MM_ANONPAGES val:22 [ 30.729903] ================================================================== [ 30.730957] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.732121] Read of size 8 at addr ffff8880163635c8 by task sshd/220 [ 30.733077] [ 30.733319] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.734305] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.735484] Call Trace: [ 30.735830] [ 30.736130] dump_stack_lvl+0x91/0xf0 [ 30.736647] print_report+0xcc/0x620 [ 30.737160] ? __virt_addr_valid+0x102/0x340 [ 30.737768] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.738420] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.739116] kasan_report+0xbe/0xf0 [ 30.739626] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.740292] vma_interval_tree_remove+0xc75/0xec0 [ 30.740937] vma_prepare+0xc54/0x11a0 [ 30.741447] __split_vma+0x5af/0x950 [ 30.741954] ? __pfx___split_vma+0x10/0x10 [ 30.742521] ? find_held_lock+0x2c/0x110 [ 30.743077] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.743687] ? lock_is_held_type+0x9f/0x120 [ 30.744264] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.744900] ? mtree_range_walk+0x632/0x900 [ 30.745508] ? mas_walk+0x5c7/0x7c0 [ 30.746015] do_vmi_munmap+0x1f1/0x2b0 [ 30.746546] mmap_region+0x1f9/0x2660 [ 30.747058] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.747602] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.748364] ? __pfx_lock_acquire+0x10/0x10 [ 30.748938] ? __pfx_mmap_region+0x10/0x10 [ 30.749517] ? security_mmap_addr+0x7d/0xa0 [ 30.750088] ? get_unmapped_area+0x1f5/0x3f0 [ 30.750668] do_mmap+0x854/0xf00 [ 30.751135] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.751665] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.752272] ksys_mmap_pgoff+0x3af/0x500 [ 30.752818] do_syscall_64+0x3f/0x90 [ 30.753342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.754045] RIP: 0033:0x7fac52aa8d82 [ 30.754536] 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 [ 30.756815] RSP: 002b:00007ffee9639be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.757804] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fac52aa8d82 [ 30.758715] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fac51ee2000 [ 30.759617] RBP: 00007fac51ee2000 R08: 0000000000000009 R09: 0000000000001000 [ 30.760531] R10: 0000000000000812 R11: 0000000000000206 R12: 000055af6e389ec0 [ 30.761460] R13: 00007ffee9639c00 R14: 00007ffee9639c30 R15: 00007ffee9639f90 [ 30.762372] [ 30.762686] [ 30.762912] Allocated by task 213: [ 30.763367] kasan_save_stack+0x22/0x50 [ 30.763905] kasan_set_track+0x25/0x30 [ 30.764433] __kasan_slab_alloc+0x59/0x70 [ 30.764984] kmem_cache_alloc+0x16b/0x370 [ 30.765577] vm_area_dup+0x20/0x160 [ 30.766055] __split_vma+0x170/0x950 [ 30.766577] split_vma+0xc6/0x110 [ 30.767063] mprotect_fixup+0x8d2/0xb30 [ 30.767611] do_mprotect_pkey+0x87e/0xd40 [ 30.768169] __x64_sys_mprotect+0x78/0xc0 [ 30.768730] do_syscall_64+0x3f/0x90 [ 30.769244] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.769944] [ 30.770179] Freed by task 213: [ 30.770609] kasan_save_stack+0x22/0x50 [ 30.771174] kasan_set_track+0x25/0x30 [ 30.771724] kasan_save_free_info+0x2b/0x50 [ 30.772322] __kasan_slab_free+0x10a/0x190 [ 30.772928] kmem_cache_free+0x10d/0x4d0 [ 30.773609] rcu_core+0x8c8/0x2860 [ 30.774111] __do_softirq+0x1b7/0x7d4 [ 30.774633] [ 30.774869] Last potentially related work creation: [ 30.775507] kasan_save_stack+0x22/0x50 [ 30.776060] __kasan_record_aux_stack+0x8e/0xa0 [ 30.776662] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.777349] remove_vma+0x139/0x170 [ 30.777825] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.778419] do_vmi_munmap+0x1f1/0x2b0 [ 30.778952] __vm_munmap+0x138/0x3a0 [ 30.779451] __x64_sys_munmap+0x59/0x80 [ 30.779976] do_syscall_64+0x3f/0x90 [ 30.780478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.781160] [ 30.781393] The buggy address belongs to the object at ffff888016363570 [ 30.781393] which belongs to the cache vm_area_struct of size 168 [ 30.782949] The buggy address is located 88 bytes inside of [ 30.782949] freed 168-byte region [ffff888016363570, ffff888016363618) [ 30.784428] [ 30.784657] The buggy address belongs to the physical page: [ 30.785374] page:00000000745f313d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16363 [ 30.786540] memcg:ffff88800e3f1a01 [ 30.786996] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.787681] page_type: 0xffffffff() [ 30.788156] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.789121] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3f1a01 [ 30.790077] page dumped because: kasan: bad access detected [ 30.790794] [ 30.791019] Memory state around the buggy address: [ 30.791630] ffff888016363480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.792525] ffff888016363500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.793437] >ffff888016363580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.794334] ^ [ 30.795032] ffff888016363600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.795930] ffff888016363680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.796827] ================================================================== [ 30.797853] Disabling lock debugging due to kernel taint [ 33.524035] BUG: Bad rss-counter state mm:00000000691d4b22 type:MM_FILEPAGES val:33 [ 33.525031] BUG: Bad rss-counter state mm:00000000691d4b22 type:MM_ANONPAGES val:22 [ 33.952094] BUG: Bad rss-counter state mm:000000008b8d2e30 type:MM_FILEPAGES val:33 [ 33.953153] BUG: Bad rss-counter state mm:000000008b8d2e30 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46777' (ECDSA) to the list of known hosts. 2023/06/20 15:40:10 fuzzer started 2023/06/20 15:40:10 dialing manager at localhost:36067 2023/06/20 15:40:10 checking machine... 2023/06/20 15:40:10 checking revisions... [ 34.604207] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:40:10 testing simple program... [ 34.649666] cgroup: Unknown subsys name 'net' [ 34.708813] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:40:10 Registers: info registers vcpu 0 RAX=1ffff11001c43cf2 RBX=dffffc0000000000 RCX=ffffffff812e0135 RDX=1ffff1100174780f RSI=ffffffff87b89f80 RDI=ffff88800e21e790 RBP=ffff88801630e8b8 RSP=ffff8880102efcf8 R8 =0000000000000001 R9 =ffffed100205df97 R10=0000000000000003 R11=00000000000b6d7d R12=ffff88800e21e788 R13=fffffbfff0f713f0 R14=0000000000000000 R15=ffffffff87b89f80 RIP=ffffffff844d287b RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0a78092900 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=00007f670c2bf650 CR3=0000000013b06000 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=00000000000000000000000000000000 XMM02=65732e64766564752d646d6574737973 XMM03=000000006563696c732e6d6574737973 XMM04=0fecf04267f0132200000000000ae988 XMM05=dc8eaca903e867ee0000000000133198 XMM06=19e9129bd510f2350000000000132030 XMM07=00000000000000000000000000000000 XMM08=3d454e494c444d435f5443454a424f00 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 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=00007ffc76858b48 CR3=0000000005482000 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=00007f12c96515100000557e2fc59790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000