syzkaller login: [ 30.832373] BUG: Bad rss-counter state mm:00000000e5ce0268 type:MM_FILEPAGES val:33 [ 30.833384] BUG: Bad rss-counter state mm:00000000e5ce0268 type:MM_ANONPAGES val:22 [ 31.013174] ================================================================== [ 31.013760] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.014312] Read of size 8 at addr ffff88800cb2fc20 by task sshd/219 [ 31.014817] [ 31.014957] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.015506] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.016132] Call Trace: [ 31.020394] [ 31.020590] dump_stack_lvl+0x91/0xf0 [ 31.020934] print_report+0xcc/0x620 [ 31.021255] ? __virt_addr_valid+0x102/0x340 [ 31.021644] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.022029] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.022428] kasan_report+0xbe/0xf0 [ 31.022785] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.023186] vma_interval_tree_remove+0xc75/0xec0 [ 31.023607] vma_prepare+0xc54/0x11a0 [ 31.023923] __split_vma+0x5af/0x950 [ 31.028255] ? __pfx___split_vma+0x10/0x10 [ 31.028618] ? find_held_lock+0x2c/0x110 [ 31.028949] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.029303] ? lock_is_held_type+0x9f/0x120 [ 31.029688] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.030089] ? mtree_range_walk+0x632/0x900 [ 31.030452] ? mas_walk+0x5c7/0x7c0 [ 31.030785] do_vmi_munmap+0x1f1/0x2b0 [ 31.031104] mmap_region+0x1f9/0x2660 [ 31.031415] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.031759] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.032221] ? __pfx_lock_acquire+0x10/0x10 [ 31.036634] ? __pfx_mmap_region+0x10/0x10 [ 31.036968] ? security_mmap_addr+0x7d/0xa0 [ 31.037311] ? get_unmapped_area+0x1f5/0x3f0 [ 31.038206] do_mmap+0x854/0xf00 [ 31.038947] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.039834] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.040892] ksys_mmap_pgoff+0x3af/0x500 [ 31.041811] do_syscall_64+0x3f/0x90 [ 31.042645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.043786] RIP: 0033:0x7fee53e0bd82 [ 31.044630] 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 [ 31.048652] RSP: 002b:00007ffe2e9bf968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.050291] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fee53e0bd82 [ 31.051894] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fee53245000 [ 31.053482] RBP: 00007fee53245000 R08: 0000000000000009 R09: 0000000000001000 [ 31.055069] R10: 0000000000000812 R11: 0000000000000206 R12: 00005607645d7ec0 [ 31.056689] R13: 00007ffe2e9bf980 R14: 00007ffe2e9bf9b0 R15: 00007ffe2e9bfd10 [ 31.058259] [ 31.058756] [ 31.059096] Allocated by task 212: [ 31.059837] kasan_save_stack+0x22/0x50 [ 31.060778] kasan_set_track+0x25/0x30 [ 31.061615] __kasan_slab_alloc+0x59/0x70 [ 31.062503] kmem_cache_alloc+0x16b/0x370 [ 31.063353] vm_area_dup+0x20/0x160 [ 31.064112] __split_vma+0x170/0x950 [ 31.064954] split_vma+0xc6/0x110 [ 31.065717] mprotect_fixup+0x8d2/0xb30 [ 31.066580] do_mprotect_pkey+0x87e/0xd40 [ 31.067481] __x64_sys_mprotect+0x78/0xc0 [ 31.068411] do_syscall_64+0x3f/0x90 [ 31.069219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.070350] [ 31.070729] Freed by task 212: [ 31.071416] kasan_save_stack+0x22/0x50 [ 31.072315] kasan_set_track+0x25/0x30 [ 31.073207] kasan_save_free_info+0x2b/0x50 [ 31.074145] __kasan_slab_free+0x10a/0x190 [ 31.075099] kmem_cache_free+0x10d/0x4d0 [ 31.075958] rcu_core+0x8c8/0x2860 [ 31.076726] __do_softirq+0x1b7/0x7d4 [ 31.077527] [ 31.077868] Last potentially related work creation: [ 31.078928] kasan_save_stack+0x22/0x50 [ 31.079804] __kasan_record_aux_stack+0x8e/0xa0 [ 31.084472] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.085367] remove_vma+0x139/0x170 [ 31.085999] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.086762] do_vmi_munmap+0x1f1/0x2b0 [ 31.087421] __vm_munmap+0x138/0x3a0 [ 31.088052] __x64_sys_munmap+0x59/0x80 [ 31.088513] do_syscall_64+0x3f/0x90 [ 31.088821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.089227] [ 31.089365] Second to last potentially related work creation: [ 31.089801] kasan_save_stack+0x22/0x50 [ 31.090126] __kasan_record_aux_stack+0x8e/0xa0 [ 31.090495] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.090910] remove_vma+0x139/0x170 [ 31.091201] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.091560] do_vmi_munmap+0x1f1/0x2b0 [ 31.091884] mmap_region+0x1f9/0x2660 [ 31.092192] do_mmap+0x854/0xf00 [ 31.098498] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.098820] ksys_mmap_pgoff+0x3af/0x500 [ 31.099141] do_syscall_64+0x3f/0x90 [ 31.099452] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.099875] [ 31.100017] The buggy address belongs to the object at ffff88800cb2fbc8 [ 31.100017] which belongs to the cache vm_area_struct of size 168 [ 31.101005] The buggy address is located 88 bytes inside of [ 31.101005] freed 168-byte region [ffff88800cb2fbc8, ffff88800cb2fc70) [ 31.101900] [ 31.102043] The buggy address belongs to the physical page: [ 31.102463] page:00000000e4231387 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb2f [ 31.103153] memcg:ffff88800dc7b001 [ 31.103425] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.103880] page_type: 0xffffffff() [ 31.104172] raw: 0100000000000200 ffff8880087a0c80 ffffea0000380ac0 dead000000000007 [ 31.104882] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc7b001 [ 31.105446] page dumped because: kasan: bad access detected [ 31.105863] [ 31.106000] Memory state around the buggy address: [ 31.106368] ffff88800cb2fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.106907] ffff88800cb2fb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.107443] >ffff88800cb2fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.107992] ^ [ 31.108365] ffff88800cb2fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.108910] ffff88800cb2fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.109444] ================================================================== [ 31.110123] Disabling lock debugging due to kernel taint [ 34.580581] BUG: Bad rss-counter state mm:00000000cec09b5b type:MM_FILEPAGES val:33 [ 34.581249] BUG: Bad rss-counter state mm:00000000cec09b5b type:MM_ANONPAGES val:22 [ 35.651261] BUG: Bad rss-counter state mm:00000000c7720ae7 type:MM_FILEPAGES val:33 [ 35.651928] BUG: Bad rss-counter state mm:00000000c7720ae7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4131' (ECDSA) to the list of known hosts. 2023/06/21 09:57:24 fuzzer started 2023/06/21 09:57:24 dialing manager at localhost:36067 2023/06/21 09:57:24 checking machine... 2023/06/21 09:57:24 checking revisions... [ 36.582312] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:57:24 testing simple program... [ 36.632388] cgroup: Unknown subsys name 'net' [ 36.711431] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:57:24 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000002 RDX=1ffff1100d9c1355 RSI=ffff88806ce09f50 RDI=ffff88806ce09aa8 RBP=ffff88806ce09f50 RSP=ffff88806ce099f0 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000fdcc R12=0000000000000008 R13=ffff88806ce02000 R14=ffff88806ce09f50 R15=ffff88806ce09a98 RIP=ffffffff81130468 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 00007fe05fd0e900 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=00007fc732b0a328 CR3=000000000ebec000 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=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=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=00007f2f71821050 CR3=000000000c968000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=5110262130104d020000000000134330 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=b9efc7947e60f8aa00000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000