syzkaller login: [ 31.235796] BUG: Bad rss-counter state mm:00000000e5be27e1 type:MM_FILEPAGES val:33 [ 31.237274] BUG: Bad rss-counter state mm:00000000e5be27e1 type:MM_ANONPAGES val:22 [ 31.400996] ================================================================== [ 31.401900] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.402833] Read of size 8 at addr ffff888015ce26b0 by task sshd/220 [ 31.403727] [ 31.403973] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.404853] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.405829] Call Trace: [ 31.406151] [ 31.406430] dump_stack_lvl+0x91/0xf0 [ 31.406927] print_report+0xcc/0x620 [ 31.407410] ? __virt_addr_valid+0x102/0x340 [ 31.407967] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.408574] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.409190] kasan_report+0xbe/0xf0 [ 31.409664] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.410303] vma_interval_tree_remove+0xc75/0xec0 [ 31.410902] vma_prepare+0xc54/0x11a0 [ 31.411386] __split_vma+0x5af/0x950 [ 31.411860] ? __pfx___split_vma+0x10/0x10 [ 31.412389] ? find_held_lock+0x2c/0x110 [ 31.412933] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.413500] ? lock_is_held_type+0x9f/0x120 [ 31.414031] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.414631] ? mtree_range_walk+0x632/0x900 [ 31.415177] ? mas_walk+0x5c7/0x7c0 [ 31.415650] do_vmi_munmap+0x1f1/0x2b0 [ 31.416136] mmap_region+0x1f9/0x2660 [ 31.416614] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.417137] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.417848] ? __pfx_lock_acquire+0x10/0x10 [ 31.418384] ? __pfx_mmap_region+0x10/0x10 [ 31.418919] ? security_mmap_addr+0x7d/0xa0 [ 31.419456] ? get_unmapped_area+0x1f5/0x3f0 [ 31.419996] do_mmap+0x854/0xf00 [ 31.420429] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.420936] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.421496] ksys_mmap_pgoff+0x3af/0x500 [ 31.422003] do_syscall_64+0x3f/0x90 [ 31.422513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.423159] RIP: 0033:0x7eff581f3d82 [ 31.423619] 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 [ 31.425774] RSP: 002b:00007fffbbdfb148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.426684] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff581f3d82 [ 31.427543] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff5762d000 [ 31.428395] RBP: 00007eff5762d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.429254] R10: 0000000000000812 R11: 0000000000000206 R12: 00005632520b4d90 [ 31.430105] R13: 00007fffbbdfb160 R14: 00007fffbbdfb190 R15: 00007fffbbdfb4f0 [ 31.430962] [ 31.431260] [ 31.431477] Allocated by task 213: [ 31.431908] kasan_save_stack+0x22/0x50 [ 31.432416] kasan_set_track+0x25/0x30 [ 31.432921] __kasan_slab_alloc+0x59/0x70 [ 31.433462] kmem_cache_alloc+0x16b/0x370 [ 31.433978] vm_area_dup+0x20/0x160 [ 31.434433] __split_vma+0x170/0x950 [ 31.434899] split_vma+0xc6/0x110 [ 31.435344] mprotect_fixup+0x8d2/0xb30 [ 31.435845] do_mprotect_pkey+0x87e/0xd40 [ 31.436372] __x64_sys_mprotect+0x78/0xc0 [ 31.436901] do_syscall_64+0x3f/0x90 [ 31.437374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.438014] [ 31.438231] Freed by task 213: [ 31.438630] kasan_save_stack+0x22/0x50 [ 31.439136] kasan_set_track+0x25/0x30 [ 31.439630] kasan_save_free_info+0x2b/0x50 [ 31.440170] __kasan_slab_free+0x10a/0x190 [ 31.440705] kmem_cache_free+0x10d/0x4d0 [ 31.441236] rcu_core+0x8c8/0x2860 [ 31.441681] __do_softirq+0x1b7/0x7d4 [ 31.442165] [ 31.442380] Last potentially related work creation: [ 31.442971] kasan_save_stack+0x22/0x50 [ 31.443483] __kasan_record_aux_stack+0x8e/0xa0 [ 31.444059] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.444703] remove_vma+0x139/0x170 [ 31.445164] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.445726] do_vmi_munmap+0x1f1/0x2b0 [ 31.446214] __vm_munmap+0x138/0x3a0 [ 31.446687] __x64_sys_munmap+0x59/0x80 [ 31.447187] do_syscall_64+0x3f/0x90 [ 31.447659] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.448297] [ 31.448511] The buggy address belongs to the object at ffff888015ce2658 [ 31.448511] which belongs to the cache vm_area_struct of size 168 [ 31.449982] The buggy address is located 88 bytes inside of [ 31.449982] freed 168-byte region [ffff888015ce2658, ffff888015ce2700) [ 31.451384] [ 31.451598] The buggy address belongs to the physical page: [ 31.452253] page:0000000066af313c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15ce2 [ 31.453359] memcg:ffff88800ec4d801 [ 31.453781] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.454422] page_type: 0xffffffff() [ 31.454876] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.455801] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec4d801 [ 31.456698] page dumped because: kasan: bad access detected [ 31.457368] [ 31.457581] Memory state around the buggy address: [ 31.458161] ffff888015ce2580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.459029] ffff888015ce2600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.459895] >ffff888015ce2680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.460746] ^ [ 31.461347] ffff888015ce2700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.462214] ffff888015ce2780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.463063] ================================================================== [ 31.464202] Disabling lock debugging due to kernel taint [ 33.690108] BUG: Bad rss-counter state mm:00000000155a7a5b type:MM_FILEPAGES val:33 [ 33.691270] BUG: Bad rss-counter state mm:00000000155a7a5b type:MM_ANONPAGES val:22 [ 34.230263] BUG: Bad rss-counter state mm:0000000064f85130 type:MM_FILEPAGES val:33 [ 34.231253] BUG: Bad rss-counter state mm:0000000064f85130 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43726' (ECDSA) to the list of known hosts. 2023/06/20 05:40:37 fuzzer started 2023/06/20 05:40:37 dialing manager at localhost:44161 2023/06/20 05:40:37 checking machine... 2023/06/20 05:40:37 checking revisions... [ 34.861680] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:40:37 testing simple program... [ 34.912784] cgroup: Unknown subsys name 'net' [ 34.959453] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:40:36 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000002 RCX=ffffffff864b1158 RDX=0000000000000008 RSI=ffffffff85407d60 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a20 R8 =ffffffff864b115c R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b523e R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407d68 R15=ffff88806ce09a98 RIP=ffffffff811303f0 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=00007fffd3bda688 CR3=0000000005482000 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=00007fa96f003510000055bc8e696790 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 info registers vcpu 1 RAX=ffffffff83639306 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11001dc3e6d RSI=ffffffff83639306 RDI=ffff88800ee1f3d8 RBP=ffff88800ee1f3a8 RSP=ffff88800ee1f308 R8 =0000000000000001 R9 =ffff88800ee1f350 R10=0000000000038001 R11=0000000000091be7 R12=ffff88800ee1f3d8 R13=0000000000000000 R14=ffff88801635d1c0 R15=ffff88800d848850 RIP=ffffffff813ad420 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 00007f16e1eab900 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=00007f16e2462618 CR3=000000000ea3a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000