syzkaller login: [ 38.636930] BUG: Bad rss-counter state mm:0000000035e3e7cc type:MM_FILEPAGES val:33 [ 38.637565] BUG: Bad rss-counter state mm:0000000035e3e7cc type:MM_ANONPAGES val:22 [ 38.886889] ================================================================== [ 38.887472] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.888068] Read of size 8 at addr ffff888017de44e0 by task sshd/221 [ 38.888541] [ 38.888676] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.889179] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.889764] Call Trace: [ 38.889961] [ 38.890141] dump_stack_lvl+0x91/0xf0 [ 38.890444] print_report+0xcc/0x620 [ 38.891990] ? __virt_addr_valid+0x102/0x340 [ 38.892377] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.892767] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.893193] kasan_report+0xbe/0xf0 [ 38.893487] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.893918] vma_interval_tree_remove+0xc75/0xec0 [ 38.894293] vma_prepare+0xc54/0x11a0 [ 38.894603] __split_vma+0x5af/0x950 [ 38.894988] ? __pfx___split_vma+0x10/0x10 [ 38.895380] ? find_held_lock+0x2c/0x110 [ 38.895726] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.896182] ? lock_is_held_type+0x9f/0x120 [ 38.896537] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.896976] ? mtree_range_walk+0x632/0x900 [ 38.897335] ? mas_walk+0x5c7/0x7c0 [ 38.897640] do_vmi_munmap+0x1f1/0x2b0 [ 38.898008] mmap_region+0x1f9/0x2660 [ 38.898317] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.898652] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.899182] ? __pfx_lock_acquire+0x10/0x10 [ 38.899528] ? __pfx_mmap_region+0x10/0x10 [ 38.899923] ? security_mmap_addr+0x7d/0xa0 [ 38.900276] ? get_unmapped_area+0x1f5/0x3f0 [ 38.900625] do_mmap+0x854/0xf00 [ 38.900958] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.901276] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.901640] ksys_mmap_pgoff+0x3af/0x500 [ 38.902009] do_syscall_64+0x3f/0x90 [ 38.902320] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.902752] RIP: 0033:0x7ff3330ffd82 [ 38.903111] 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 [ 38.904443] RSP: 002b:00007ffef505c438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.905053] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff3330ffd82 [ 38.905596] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff332539000 [ 38.906157] RBP: 00007ff332539000 R08: 0000000000000009 R09: 0000000000001000 [ 38.906690] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561dc6cb9f70 [ 38.907332] R13: 00007ffef505c450 R14: 00007ffef505c480 R15: 00007ffef505c7e0 [ 38.907934] [ 38.908152] [ 38.908300] Allocated by task 214: [ 38.908574] kasan_save_stack+0x22/0x50 [ 38.908949] kasan_set_track+0x25/0x30 [ 38.909272] __kasan_slab_alloc+0x59/0x70 [ 38.909605] kmem_cache_alloc+0x16b/0x370 [ 38.909985] vm_area_dup+0x20/0x160 [ 38.910283] __split_vma+0x170/0x950 [ 38.910588] split_vma+0xc6/0x110 [ 38.910949] mprotect_fixup+0x8d2/0xb30 [ 38.911272] do_mprotect_pkey+0x87e/0xd40 [ 38.911604] __x64_sys_mprotect+0x78/0xc0 [ 38.911990] do_syscall_64+0x3f/0x90 [ 38.912299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.912711] [ 38.912901] Freed by task 13: [ 38.913175] kasan_save_stack+0x22/0x50 [ 38.913498] kasan_set_track+0x25/0x30 [ 38.913862] kasan_save_free_info+0x2b/0x50 [ 38.914189] __kasan_slab_free+0x10a/0x190 [ 38.914522] kmem_cache_free+0x10d/0x4d0 [ 38.914936] rcu_core+0x8c8/0x2860 [ 38.915214] __do_softirq+0x1b7/0x7d4 [ 38.915517] [ 38.915650] Last potentially related work creation: [ 38.916072] kasan_save_stack+0x22/0x50 [ 38.916434] __kasan_record_aux_stack+0x8e/0xa0 [ 38.916845] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.917310] remove_vma+0x139/0x170 [ 38.917604] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.918008] do_vmi_munmap+0x1f1/0x2b0 [ 38.918322] __vm_munmap+0x138/0x3a0 [ 38.918644] __x64_sys_munmap+0x59/0x80 [ 38.919045] do_syscall_64+0x3f/0x90 [ 38.919357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.919775] [ 38.919969] The buggy address belongs to the object at ffff888017de4488 [ 38.919969] which belongs to the cache vm_area_struct of size 168 [ 38.920949] The buggy address is located 88 bytes inside of [ 38.920949] freed 168-byte region [ffff888017de4488, ffff888017de4530) [ 38.921899] [ 38.922041] The buggy address belongs to the physical page: [ 38.922463] page:0000000025132874 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17de4 [ 38.923284] memcg:ffff888019d72a01 [ 38.923575] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.924050] page_type: 0xffffffff() [ 38.924377] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.925015] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d72a01 [ 38.925595] page dumped because: kasan: bad access detected [ 38.926074] [ 38.926216] Memory state around the buggy address: [ 38.926599] ffff888017de4380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.927239] ffff888017de4400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.927865] >ffff888017de4480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.928442] ^ [ 38.928976] ffff888017de4500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.929525] ffff888017de4580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.930120] ================================================================== [ 38.947564] Disabling lock debugging due to kernel taint [ 41.965153] BUG: Bad rss-counter state mm:00000000702b178b type:MM_FILEPAGES val:33 [ 41.965859] BUG: Bad rss-counter state mm:00000000702b178b type:MM_ANONPAGES val:22 [ 42.705058] BUG: Bad rss-counter state mm:0000000026c2cc11 type:MM_FILEPAGES val:33 [ 42.705706] BUG: Bad rss-counter state mm:0000000026c2cc11 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6778' (ECDSA) to the list of known hosts. 2023/06/21 10:11:09 fuzzer started 2023/06/21 10:11:10 dialing manager at localhost:36067 2023/06/21 10:11:10 checking machine... 2023/06/21 10:11:10 checking revisions... [ 43.644338] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:11:10 testing simple program... [ 43.710217] cgroup: Unknown subsys name 'net' [ 43.785977] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:11:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff1100d9c1320 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88806ce098e8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b54e7 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180fea8 RFL=00000256 [---ZAP-] 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=000055f2c5ba84d0 CR3=0000000016814000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=ffffffff85dfe184 RCX=ffffffff8180ce88 RDX=0000000000000000 RSI=ffffffff86139066 RDI=ffffffff85dfe158 RBP=ffffffff85dfe180 RSP=ffff88800f35f5e0 R8 =ffffffff86139066 R9 =ffff88800f35f6d8 R10=0000000000038001 R11=0000000000020de5 R12=ffffffff85dfe18c R13=ffffffff85dfe158 R14=ffffffff85dfe17c R15=dffffc0000000000 RIP=ffffffff8112fc8e 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 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=00007f5c0f84a298 CR3=000000000eec8000 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=756e696c2d34365f3638782f62696c2f XMM01=2e676e2d70616362696c2f756e672d78 XMM02=00302e6f732e676e2d70616362696c2f XMM03=756e672d78756e696c2d34365f363878 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000