syzkaller login: [ 70.187985] BUG: Bad rss-counter state mm:00000000fbd0d475 type:MM_FILEPAGES val:33 [ 70.188987] BUG: Bad rss-counter state mm:00000000fbd0d475 type:MM_ANONPAGES val:22 [ 70.372128] ================================================================== [ 70.373181] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 70.374384] Read of size 8 at addr ffff88800ec24c20 by task sshd/219 [ 70.375262] [ 70.375518] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 70.376922] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 70.378130] Call Trace: [ 70.378498] [ 70.378825] dump_stack_lvl+0x91/0xf0 [ 70.379401] print_report+0xcc/0x620 [ 70.379964] ? __virt_addr_valid+0x102/0x340 [ 70.380600] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.381309] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.382065] kasan_report+0xbe/0xf0 [ 70.382627] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.383361] vma_interval_tree_remove+0xc75/0xec0 [ 70.384174] vma_prepare+0xc54/0x11a0 [ 70.384843] __split_vma+0x5af/0x950 [ 70.385400] ? __pfx___split_vma+0x10/0x10 [ 70.386041] ? find_held_lock+0x2c/0x110 [ 70.386666] do_vmi_align_munmap+0x2ba/0x11f0 [ 70.387336] ? lock_is_held_type+0x9f/0x120 [ 70.387981] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 70.388700] ? mtree_range_walk+0x632/0x900 [ 70.389447] ? mas_walk+0x5c7/0x7c0 [ 70.390191] do_vmi_munmap+0x1f1/0x2b0 [ 70.390825] mmap_region+0x1f9/0x2660 [ 70.391424] ? vm_mmap_pgoff+0x15c/0x3a0 [ 70.392052] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 70.392931] ? __pfx_lock_acquire+0x10/0x10 [ 70.393600] ? __pfx_mmap_region+0x10/0x10 [ 70.394282] ? security_mmap_addr+0x7d/0xa0 [ 70.394777] ? get_unmapped_area+0x1f5/0x3f0 [ 70.395201] do_mmap+0x854/0xf00 [ 70.395541] vm_mmap_pgoff+0x1a6/0x3a0 [ 70.395920] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 70.396352] ksys_mmap_pgoff+0x3af/0x500 [ 70.396788] do_syscall_64+0x3f/0x90 [ 70.397166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.397681] RIP: 0033:0x7f38fe1eed82 [ 70.398036] 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 [ 70.399681] RSP: 002b:00007ffea2c9d068 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 70.400376] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f38fe1eed82 [ 70.401033] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f38fd628000 [ 70.401697] RBP: 00007f38fd628000 R08: 0000000000000009 R09: 0000000000001000 [ 70.402354] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557c2935ab20 [ 70.403031] R13: 00007ffea2c9d080 R14: 00007ffea2c9d0b0 R15: 00007ffea2c9d410 [ 70.403718] [ 70.403944] [ 70.404109] Allocated by task 212: [ 70.404455] kasan_save_stack+0x22/0x50 [ 70.404857] kasan_set_track+0x25/0x30 [ 70.405258] __kasan_slab_alloc+0x59/0x70 [ 70.405683] kmem_cache_alloc+0x16b/0x370 [ 70.406086] vm_area_dup+0x20/0x160 [ 70.406446] __split_vma+0x170/0x950 [ 70.406777] split_vma+0xc6/0x110 [ 70.407028] mprotect_fixup+0x8d2/0xb30 [ 70.407328] do_mprotect_pkey+0x87e/0xd40 [ 70.407651] __x64_sys_mprotect+0x78/0xc0 [ 70.407953] do_syscall_64+0x3f/0x90 [ 70.408225] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.408595] [ 70.408717] Freed by task 19: [ 70.408937] kasan_save_stack+0x22/0x50 [ 70.409231] kasan_set_track+0x25/0x30 [ 70.409515] kasan_save_free_info+0x2b/0x50 [ 70.409830] __kasan_slab_free+0x10a/0x190 [ 70.410141] kmem_cache_free+0x10d/0x4d0 [ 70.410435] rcu_core+0x8c8/0x2860 [ 70.410702] __do_softirq+0x1b7/0x7d4 [ 70.410983] [ 70.411105] Last potentially related work creation: [ 70.411444] kasan_save_stack+0x22/0x50 [ 70.411735] __kasan_record_aux_stack+0x8e/0xa0 [ 70.412071] __call_rcu_common.constprop.0+0x6a/0xb90 [ 70.412438] remove_vma+0x139/0x170 [ 70.412697] do_vmi_align_munmap+0xd4a/0x11f0 [ 70.413024] do_vmi_munmap+0x1f1/0x2b0 [ 70.413301] __vm_munmap+0x138/0x3a0 [ 70.413567] __x64_sys_munmap+0x59/0x80 [ 70.413866] do_syscall_64+0x3f/0x90 [ 70.414140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.414590] [ 70.414714] The buggy address belongs to the object at ffff88800ec24bc8 [ 70.414714] which belongs to the cache vm_area_struct of size 168 [ 70.415570] The buggy address is located 88 bytes inside of [ 70.415570] freed 168-byte region [ffff88800ec24bc8, ffff88800ec24c70) [ 70.416385] [ 70.416508] The buggy address belongs to the physical page: [ 70.416895] page:000000006c906d4f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec24 [ 70.417516] memcg:ffff88800ec20201 [ 70.417772] flags: 0x100000000000200(slab|node=0|zone=1) [ 70.418143] page_type: 0xffffffff() [ 70.418401] raw: 0100000000000200 ffff88800879fc80 ffffea00003d82c0 dead000000000008 [ 70.418938] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec20201 [ 70.419467] page dumped because: kasan: bad access detected [ 70.419850] [ 70.419973] Memory state around the buggy address: [ 70.420311] ffff88800ec24b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.420809] ffff88800ec24b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 70.421301] >ffff88800ec24c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 70.421806] ^ [ 70.422115] ffff88800ec24c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 70.422615] ffff88800ec24d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 70.423108] ================================================================== [ 70.423778] Disabling lock debugging due to kernel taint [ 72.328262] BUG: Bad rss-counter state mm:0000000023f5a746 type:MM_FILEPAGES val:33 [ 72.329067] BUG: Bad rss-counter state mm:0000000023f5a746 type:MM_ANONPAGES val:22 [ 72.722309] BUG: Bad rss-counter state mm:00000000364f0ce1 type:MM_FILEPAGES val:33 [ 72.722976] BUG: Bad rss-counter state mm:00000000364f0ce1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29421' (ECDSA) to the list of known hosts. 2023/06/19 19:29:01 fuzzer started 2023/06/19 19:29:02 dialing manager at localhost:44161 2023/06/19 19:29:02 checking machine... 2023/06/19 19:29:02 checking revisions... [ 73.418439] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:29:02 testing simple program... [ 73.455189] cgroup: Unknown subsys name 'net' [ 73.492241] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:28:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000000b RCX=ffffffff83148a99 RDX=ffff88801013b680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffffffff87f94640 RSP=ffff888019917aa8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=ffff888019917b38 R14=ffff888019917b38 R15=00000000000000e5 RIP=ffffffff814c01fc 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 00007f0459131900 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=00007f04596e8618 CR3=000000000c71c000 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=563412feff00545000000000000080fe 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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fa5f2191010 CR3=000000000f254000 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=2031303a39323a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a39323a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000