syzkaller login: [ 38.761771] BUG: Bad rss-counter state mm:0000000003419fc9 type:MM_FILEPAGES val:33 [ 38.763146] BUG: Bad rss-counter state mm:0000000003419fc9 type:MM_ANONPAGES val:22 [ 38.908728] ================================================================== [ 38.909637] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.910580] Read of size 8 at addr ffff88800d5d5310 by task sshd/218 [ 38.911471] [ 38.911717] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.912585] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.913594] Call Trace: [ 38.913915] [ 38.914200] dump_stack_lvl+0x91/0xf0 [ 38.914704] print_report+0xcc/0x620 [ 38.915191] ? __virt_addr_valid+0x102/0x340 [ 38.915786] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.916432] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.917059] kasan_report+0xbe/0xf0 [ 38.917554] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.918180] vma_interval_tree_remove+0xc75/0xec0 [ 38.918803] vma_prepare+0xc54/0x11a0 [ 38.919285] __split_vma+0x5af/0x950 [ 38.919775] ? __pfx___split_vma+0x10/0x10 [ 38.920314] ? find_held_lock+0x2c/0x110 [ 38.920841] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.921414] ? lock_is_held_type+0x9f/0x120 [ 38.921968] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.922576] ? mtree_range_walk+0x632/0x900 [ 38.923139] ? mas_walk+0x5c7/0x7c0 [ 38.923631] do_vmi_munmap+0x1f1/0x2b0 [ 38.924126] mmap_region+0x1f9/0x2660 [ 38.924617] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.925145] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.925873] ? __pfx_lock_acquire+0x10/0x10 [ 38.926411] ? __pfx_mmap_region+0x10/0x10 [ 38.926954] ? security_mmap_addr+0x7d/0xa0 [ 38.927496] ? get_unmapped_area+0x1f5/0x3f0 [ 38.928080] do_mmap+0x854/0xf00 [ 38.928523] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.929023] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.929595] ksys_mmap_pgoff+0x3af/0x500 [ 38.930110] do_syscall_64+0x3f/0x90 [ 38.930593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.931245] RIP: 0033:0x7fdda70fed82 [ 38.931720] 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 [ 38.933865] RSP: 002b:00007ffc6dd44778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.934784] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdda70fed82 [ 38.935660] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdda6538000 [ 38.936504] RBP: 00007fdda6538000 R08: 0000000000000009 R09: 0000000000001000 [ 38.937372] R10: 0000000000000812 R11: 0000000000000206 R12: 00005631836f8ec0 [ 38.938233] R13: 00007ffc6dd44790 R14: 00007ffc6dd447c0 R15: 00007ffc6dd44b20 [ 38.939097] [ 38.939390] [ 38.939617] Allocated by task 211: [ 38.940049] kasan_save_stack+0x22/0x50 [ 38.940558] kasan_set_track+0x25/0x30 [ 38.941069] __kasan_slab_alloc+0x59/0x70 [ 38.941596] kmem_cache_alloc+0x16b/0x370 [ 38.942109] vm_area_dup+0x20/0x160 [ 38.942567] __split_vma+0x170/0x950 [ 38.943036] split_vma+0xc6/0x110 [ 38.943476] mprotect_fixup+0x8d2/0xb30 [ 38.943997] do_mprotect_pkey+0x87e/0xd40 [ 38.944521] __x64_sys_mprotect+0x78/0xc0 [ 38.945037] do_syscall_64+0x3f/0x90 [ 38.945515] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.946168] [ 38.946387] Freed by task 211: [ 38.946787] kasan_save_stack+0x22/0x50 [ 38.947284] kasan_set_track+0x25/0x30 [ 38.947796] kasan_save_free_info+0x2b/0x50 [ 38.948335] __kasan_slab_free+0x10a/0x190 [ 38.948878] kmem_cache_free+0x10d/0x4d0 [ 38.949390] rcu_core+0x8c8/0x2860 [ 38.949839] __do_softirq+0x1b7/0x7d4 [ 38.950314] [ 38.950530] Last potentially related work creation: [ 38.951116] kasan_save_stack+0x22/0x50 [ 38.951644] __kasan_record_aux_stack+0x8e/0xa0 [ 38.952218] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.952865] remove_vma+0x139/0x170 [ 38.953332] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.953890] do_vmi_munmap+0x1f1/0x2b0 [ 38.954376] __vm_munmap+0x138/0x3a0 [ 38.954854] __x64_sys_munmap+0x59/0x80 [ 38.955355] do_syscall_64+0x3f/0x90 [ 38.955847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.956487] [ 38.956703] The buggy address belongs to the object at ffff88800d5d52b8 [ 38.956703] which belongs to the cache vm_area_struct of size 168 [ 38.958170] The buggy address is located 88 bytes inside of [ 38.958170] freed 168-byte region [ffff88800d5d52b8, ffff88800d5d5360) [ 38.959600] [ 38.959821] The buggy address belongs to the physical page: [ 38.960472] page:00000000e3fa58f4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5d5 [ 38.961566] memcg:ffff88800daeaf01 [ 38.961987] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.962637] page_type: 0xffffffff() [ 38.963093] raw: 0100000000000200 ffff8880087a0c80 ffffea00003d6e80 dead000000000004 [ 38.964026] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800daeaf01 [ 38.964936] page dumped because: kasan: bad access detected [ 38.965599] [ 38.965820] Memory state around the buggy address: [ 38.966399] ffff88800d5d5200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.967260] ffff88800d5d5280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.968127] >ffff88800d5d5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.968983] ^ [ 38.969447] ffff88800d5d5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.970307] ffff88800d5d5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.971172] ================================================================== [ 38.972212] Disabling lock debugging due to kernel taint [ 41.234032] BUG: Bad rss-counter state mm:00000000f3af654a type:MM_FILEPAGES val:33 [ 41.235000] BUG: Bad rss-counter state mm:00000000f3af654a type:MM_ANONPAGES val:22 [ 41.703485] BUG: Bad rss-counter state mm:00000000b1ddd590 type:MM_FILEPAGES val:33 [ 41.704474] BUG: Bad rss-counter state mm:00000000b1ddd590 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21282' (ECDSA) to the list of known hosts. 2023/06/21 10:34:02 fuzzer started 2023/06/21 10:34:03 dialing manager at localhost:36067 2023/06/21 10:34:03 checking machine... 2023/06/21 10:34:03 checking revisions... [ 42.409715] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:34:03 testing simple program... [ 42.456970] cgroup: Unknown subsys name 'net' [ 42.518047] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:34:02 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=ffffffff85652c08 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff814c855d RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff88800e349ec0 RIP=ffffffff84511dca 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 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=00007f1eccf77000 CR3=0000000010332000 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=2032303a34333a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a34333a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad720 RCX=ffff8880168df210 RDX=1ffff11002d1be39 RSI=ffff8880168df208 RDI=ffffffff813ad720 RBP=ffffffff813ad720 RSP=ffff8880168df128 R8 =0000000000000001 R9 =ffff8880168df1b0 R10=0000000000038001 R11=0000000000003c0d R12=ffff8880168df238 R13=0000000000000000 R14=ffff88800eccd1c0 R15=ffff888019ee1e40 RIP=ffffffff811fc6f0 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fda51366900 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=00007fda51345020 CR3=0000000016ad0000 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