syzkaller login: [ 30.373406] BUG: Bad rss-counter state mm:000000007ada7330 type:MM_FILEPAGES val:33 [ 30.374141] BUG: Bad rss-counter state mm:000000007ada7330 type:MM_ANONPAGES val:22 [ 30.490487] ================================================================== [ 30.491181] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.491823] Read of size 8 at addr ffff88800f014968 by task sshd/219 [ 30.492315] [ 30.492486] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.493054] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.493732] Call Trace: [ 30.493952] [ 30.494146] dump_stack_lvl+0x91/0xf0 [ 30.494481] print_report+0xcc/0x620 [ 30.494799] ? __virt_addr_valid+0x102/0x340 [ 30.495157] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.495744] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.496149] kasan_report+0xbe/0xf0 [ 30.496500] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.496918] vma_interval_tree_remove+0xc75/0xec0 [ 30.497327] vma_prepare+0xc54/0x11a0 [ 30.497665] __split_vma+0x5af/0x950 [ 30.497964] ? __pfx___split_vma+0x10/0x10 [ 30.498303] ? find_held_lock+0x2c/0x110 [ 30.498650] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.499033] ? lock_is_held_type+0x9f/0x120 [ 30.499401] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.499811] ? mtree_range_walk+0x632/0x900 [ 30.500166] ? mas_walk+0x5c7/0x7c0 [ 30.500497] do_vmi_munmap+0x1f1/0x2b0 [ 30.500826] mmap_region+0x1f9/0x2660 [ 30.501139] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.501475] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.501938] ? __pfx_lock_acquire+0x10/0x10 [ 30.502288] ? __pfx_mmap_region+0x10/0x10 [ 30.502659] ? security_mmap_addr+0x7d/0xa0 [ 30.503040] ? get_unmapped_area+0x1f5/0x3f0 [ 30.503418] do_mmap+0x854/0xf00 [ 30.503698] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.504029] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.504462] ksys_mmap_pgoff+0x3af/0x500 [ 30.504815] do_syscall_64+0x3f/0x90 [ 30.505143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.505570] RIP: 0033:0x7f593c099d82 [ 30.505867] 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 [ 30.507231] RSP: 002b:00007fff4952f038 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.507841] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f593c099d82 [ 30.508450] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f593b4d3000 [ 30.509005] RBP: 00007f593b4d3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.509580] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d766b3ec0 [ 30.510154] R13: 00007fff4952f050 R14: 00007fff4952f080 R15: 00007fff4952f3e0 [ 30.510733] [ 30.510926] [ 30.511070] Allocated by task 212: [ 30.511351] kasan_save_stack+0x22/0x50 [ 30.511704] kasan_set_track+0x25/0x30 [ 30.512046] __kasan_slab_alloc+0x59/0x70 [ 30.512460] kmem_cache_alloc+0x16b/0x370 [ 30.512809] vm_area_dup+0x20/0x160 [ 30.513118] __split_vma+0x170/0x950 [ 30.513433] split_vma+0xc6/0x110 [ 30.513742] mprotect_fixup+0x8d2/0xb30 [ 30.514083] do_mprotect_pkey+0x87e/0xd40 [ 30.514435] __x64_sys_mprotect+0x78/0xc0 [ 30.514793] do_syscall_64+0x3f/0x90 [ 30.515131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.515577] [ 30.515724] Freed by task 212: [ 30.516001] kasan_save_stack+0x22/0x50 [ 30.516349] kasan_set_track+0x25/0x30 [ 30.516749] kasan_save_free_info+0x2b/0x50 [ 30.517110] __kasan_slab_free+0x10a/0x190 [ 30.517471] kmem_cache_free+0x10d/0x4d0 [ 30.517813] rcu_core+0x8c8/0x2860 [ 30.518104] __do_softirq+0x1b7/0x7d4 [ 30.518439] [ 30.518583] Last potentially related work creation: [ 30.518976] kasan_save_stack+0x22/0x50 [ 30.519312] __kasan_record_aux_stack+0x8e/0xa0 [ 30.519700] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.520137] remove_vma+0x139/0x170 [ 30.520517] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.520887] do_vmi_munmap+0x1f1/0x2b0 [ 30.521235] __vm_munmap+0x138/0x3a0 [ 30.521553] __x64_sys_munmap+0x59/0x80 [ 30.521899] do_syscall_64+0x3f/0x90 [ 30.522253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.522751] [ 30.522914] The buggy address belongs to the object at ffff88800f014910 [ 30.522914] which belongs to the cache vm_area_struct of size 168 [ 30.523912] The buggy address is located 88 bytes inside of [ 30.523912] freed 168-byte region [ffff88800f014910, ffff88800f0149b8) [ 30.524994] [ 30.525140] The buggy address belongs to the physical page: [ 30.525582] page:0000000014b7c958 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf014 [ 30.526391] memcg:ffff88800df98901 [ 30.526683] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.527114] page_type: 0xffffffff() [ 30.527471] raw: 0100000000000200 ffff8880087a0c80 ffffea000061b500 dead000000000008 [ 30.528267] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df98901 [ 30.528973] page dumped because: kasan: bad access detected [ 30.529417] [ 30.529561] Memory state around the buggy address: [ 30.529962] ffff88800f014800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.530597] ffff88800f014880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.531210] >ffff88800f014900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.531815] ^ [ 30.532346] ffff88800f014980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.533018] ffff88800f014a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.533706] ================================================================== [ 30.534541] Disabling lock debugging due to kernel taint [ 32.372405] BUG: Bad rss-counter state mm:00000000b2fc03fc type:MM_FILEPAGES val:33 [ 32.373165] BUG: Bad rss-counter state mm:00000000b2fc03fc type:MM_ANONPAGES val:22 [ 32.671928] BUG: Bad rss-counter state mm:00000000fbdd3406 type:MM_FILEPAGES val:33 [ 32.672757] BUG: Bad rss-counter state mm:00000000fbdd3406 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48538' (ECDSA) to the list of known hosts. 2023/06/21 08:56:19 fuzzer started 2023/06/21 08:56:19 dialing manager at localhost:36067 2023/06/21 08:56:19 checking machine... 2023/06/21 08:56:19 checking revisions... [ 33.241768] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:56:19 testing simple program... [ 33.290691] cgroup: Unknown subsys name 'net' [ 33.339187] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:56:18 Registers: info registers vcpu 0 RAX=00007f2709594510 RBX=00007ffdea18e430 RCX=000000000000acf8 RDX=0000000000000000 RSI=00007ffdea18e430 RDI=00007f2709684030 RBP=000055c8b8860290 RSP=00007ffdea18def0 R8 =0000000000132ff0 R9 =0000000000132ff0 R10=0000000000000002 R11=000000000000d600 R12=000000000000002b R13=0000000000041f20 R14=0000000000000000 R15=00007ffdea18df10 RIP=00007f270aceaace RFL=00010246 [---Z-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 00007f270a166900 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=00007f2709594510 CR3=000000000c6b4000 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=6836150fde840d7200000000000ae988 XMM05=398b0268f52777950000000000132ca8 XMM06=806171799158d9670000000000131a98 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=0000000000000001 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=00007ffd1f0532f8 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=00007f9d18e12510000055b166aea790 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