syzkaller login: [ 34.165191] BUG: Bad rss-counter state mm:0000000038b15eac type:MM_FILEPAGES val:33 [ 34.165983] BUG: Bad rss-counter state mm:0000000038b15eac type:MM_ANONPAGES val:22 [ 34.195708] ================================================================== [ 34.196352] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.197107] Read of size 8 at addr ffff88800c675798 by task sshd/220 [ 34.197652] [ 34.197805] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.198413] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.199245] Call Trace: [ 34.199469] [ 34.199666] dump_stack_lvl+0x91/0xf0 [ 34.200008] print_report+0xcc/0x620 [ 34.200340] ? __virt_addr_valid+0x102/0x340 [ 34.200752] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.201213] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.201675] kasan_report+0xbe/0xf0 [ 34.202028] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.202480] vma_interval_tree_remove+0xc75/0xec0 [ 34.202906] vma_prepare+0xc54/0x11a0 [ 34.203244] __split_vma+0x5af/0x950 [ 34.203572] ? __pfx___split_vma+0x10/0x10 [ 34.203935] ? find_held_lock+0x2c/0x110 [ 34.204301] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.204708] ? lock_is_held_type+0x9f/0x120 [ 34.205100] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.205601] ? mtree_range_walk+0x632/0x900 [ 34.205992] ? mas_walk+0x5c7/0x7c0 [ 34.206352] do_vmi_munmap+0x1f1/0x2b0 [ 34.206703] mmap_region+0x1f9/0x2660 [ 34.207044] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.207394] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.207900] ? __pfx_lock_acquire+0x10/0x10 [ 34.208282] ? __pfx_mmap_region+0x10/0x10 [ 34.208659] ? security_mmap_addr+0x7d/0xa0 [ 34.209041] ? get_unmapped_area+0x1f5/0x3f0 [ 34.209482] do_mmap+0x854/0xf00 [ 34.209802] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.210177] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.210563] ksys_mmap_pgoff+0x3af/0x500 [ 34.210921] do_syscall_64+0x3f/0x90 [ 34.211261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.211724] RIP: 0033:0x7f06b5283d82 [ 34.212052] 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 [ 34.213554] RSP: 002b:00007fffb6bffd08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.214188] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f06b5283d82 [ 34.214773] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f06b46bd000 [ 34.215360] RBP: 00007f06b46bd000 R08: 0000000000000009 R09: 0000000000001000 [ 34.215946] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557a2a509d90 [ 34.216536] R13: 00007fffb6bffd20 R14: 00007fffb6bffd50 R15: 00007fffb6c000b0 [ 34.217149] [ 34.217372] [ 34.217555] Allocated by task 212: [ 34.217852] kasan_save_stack+0x22/0x50 [ 34.218242] kasan_set_track+0x25/0x30 [ 34.218587] __kasan_slab_alloc+0x59/0x70 [ 34.218952] kmem_cache_alloc+0x16b/0x370 [ 34.219320] vm_area_dup+0x20/0x160 [ 34.219644] __split_vma+0x170/0x950 [ 34.219968] split_vma+0xc6/0x110 [ 34.220278] mprotect_fixup+0x8d2/0xb30 [ 34.220623] do_mprotect_pkey+0x87e/0xd40 [ 34.220980] __x64_sys_mprotect+0x78/0xc0 [ 34.221395] do_syscall_64+0x3f/0x90 [ 34.221742] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.222192] [ 34.222341] Freed by task 212: [ 34.222615] kasan_save_stack+0x22/0x50 [ 34.222968] kasan_set_track+0x25/0x30 [ 34.223308] kasan_save_free_info+0x2b/0x50 [ 34.223678] __kasan_slab_free+0x10a/0x190 [ 34.224054] kmem_cache_free+0x10d/0x4d0 [ 34.224409] rcu_core+0x8c8/0x2860 [ 34.224723] __do_softirq+0x1b7/0x7d4 [ 34.225057] [ 34.225220] Last potentially related work creation: [ 34.225670] kasan_save_stack+0x22/0x50 [ 34.226023] __kasan_record_aux_stack+0x8e/0xa0 [ 34.226427] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.226876] remove_vma+0x139/0x170 [ 34.227195] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.227578] do_vmi_munmap+0x1f1/0x2b0 [ 34.227918] __vm_munmap+0x138/0x3a0 [ 34.228244] __x64_sys_munmap+0x59/0x80 [ 34.228592] do_syscall_64+0x3f/0x90 [ 34.228927] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.229437] [ 34.229607] The buggy address belongs to the object at ffff88800c675740 [ 34.229607] which belongs to the cache vm_area_struct of size 168 [ 34.230653] The buggy address is located 88 bytes inside of [ 34.230653] freed 168-byte region [ffff88800c675740, ffff88800c6757e8) [ 34.231606] [ 34.231756] The buggy address belongs to the physical page: [ 34.232238] page:000000004a3512e0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc675 [ 34.233022] memcg:ffff88800f6be201 [ 34.233325] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.233804] page_type: 0xffffffff() [ 34.234110] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.234741] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f6be201 [ 34.235366] page dumped because: kasan: bad access detected [ 34.235821] [ 34.235971] Memory state around the buggy address: [ 34.236381] ffff88800c675680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.236981] ffff88800c675700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 34.237615] >ffff88800c675780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.238197] ^ [ 34.238535] ffff88800c675800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.239122] ffff88800c675880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.239719] ================================================================== [ 34.240508] Disabling lock debugging due to kernel taint [ 35.798674] BUG: Bad rss-counter state mm:000000008467cc78 type:MM_FILEPAGES val:33 [ 35.799430] BUG: Bad rss-counter state mm:000000008467cc78 type:MM_ANONPAGES val:22 [ 36.125636] BUG: Bad rss-counter state mm:00000000421f0667 type:MM_FILEPAGES val:33 [ 36.126317] BUG: Bad rss-counter state mm:00000000421f0667 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27002' (ECDSA) to the list of known hosts. 2023/06/20 09:07:37 fuzzer started 2023/06/20 09:07:37 dialing manager at localhost:44161 2023/06/20 09:07:37 checking machine... 2023/06/20 09:07:37 checking revisions... [ 36.704757] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:07:37 testing simple program... [ 36.739592] cgroup: Unknown subsys name 'net' [ 36.786274] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:07:33 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fff6570c828 CR3=000000000f1fa000 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=2037333a37303a3930203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a37303a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81ef5889 RDX=000000000000ef58 RSI=000000000000ef58 RDI=ffffffff86523920 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =1ffffffff0ca4724 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000039ba3 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130775 RFL=00000216 [----AP-] 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 00007fb545451900 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=00007fb545a06650 CR3=000000000f00a000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000