syzkaller login: [ 30.990773] BUG: Bad rss-counter state mm:00000000d3486257 type:MM_FILEPAGES val:33 [ 30.991823] BUG: Bad rss-counter state mm:00000000d3486257 type:MM_ANONPAGES val:22 [ 31.163647] ================================================================== [ 31.164606] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.165564] Read of size 8 at addr ffff8880094aa4e0 by task sshd/222 [ 31.166355] [ 31.166669] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.167555] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.168544] Call Trace: [ 31.168872] [ 31.169164] dump_stack_lvl+0x91/0xf0 [ 31.169660] print_report+0xcc/0x620 [ 31.170189] ? __virt_addr_valid+0x102/0x340 [ 31.170761] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.171386] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.172015] kasan_report+0xbe/0xf0 [ 31.172502] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.173137] vma_interval_tree_remove+0xc75/0xec0 [ 31.173751] vma_prepare+0xc54/0x11a0 [ 31.174263] __split_vma+0x5af/0x950 [ 31.174743] ? __pfx___split_vma+0x10/0x10 [ 31.175283] ? find_held_lock+0x2c/0x110 [ 31.175809] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.176384] ? lock_is_held_type+0x9f/0x120 [ 31.176930] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.177543] ? mtree_range_walk+0x632/0x900 [ 31.178121] ? mas_walk+0x5c7/0x7c0 [ 31.178600] do_vmi_munmap+0x1f1/0x2b0 [ 31.179093] mmap_region+0x1f9/0x2660 [ 31.179573] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.180093] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.180803] ? __pfx_lock_acquire+0x10/0x10 [ 31.181342] ? __pfx_mmap_region+0x10/0x10 [ 31.181872] ? security_mmap_addr+0x7d/0xa0 [ 31.182425] ? get_unmapped_area+0x1f5/0x3f0 [ 31.182978] do_mmap+0x854/0xf00 [ 31.183425] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.183926] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.184500] ksys_mmap_pgoff+0x3af/0x500 [ 31.185016] do_syscall_64+0x3f/0x90 [ 31.185501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.186168] RIP: 0033:0x7f028914bd82 [ 31.186635] 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 [ 31.188767] RSP: 002b:00007ffe4407d678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.189670] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f028914bd82 [ 31.190532] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0288585000 [ 31.191383] RBP: 00007f0288585000 R08: 0000000000000009 R09: 0000000000001000 [ 31.192235] R10: 0000000000000812 R11: 0000000000000206 R12: 000055feef169f60 [ 31.193082] R13: 00007ffe4407d690 R14: 00007ffe4407d6c0 R15: 00007ffe4407da20 [ 31.193968] [ 31.194273] [ 31.194488] Allocated by task 215: [ 31.194916] kasan_save_stack+0x22/0x50 [ 31.195422] kasan_set_track+0x25/0x30 [ 31.195931] __kasan_slab_alloc+0x59/0x70 [ 31.196458] kmem_cache_alloc+0x16b/0x370 [ 31.196977] vm_area_dup+0x20/0x160 [ 31.197435] __split_vma+0x170/0x950 [ 31.197907] split_vma+0xc6/0x110 [ 31.198356] mprotect_fixup+0x8d2/0xb30 [ 31.198858] do_mprotect_pkey+0x87e/0xd40 [ 31.199391] __x64_sys_mprotect+0x78/0xc0 [ 31.199919] do_syscall_64+0x3f/0x90 [ 31.200402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.201044] [ 31.201262] Freed by task 215: [ 31.201654] kasan_save_stack+0x22/0x50 [ 31.202179] kasan_set_track+0x25/0x30 [ 31.202682] kasan_save_free_info+0x2b/0x50 [ 31.203215] __kasan_slab_free+0x10a/0x190 [ 31.203758] kmem_cache_free+0x10d/0x4d0 [ 31.204274] rcu_core+0x8c8/0x2860 [ 31.204729] __do_softirq+0x1b7/0x7d4 [ 31.205206] [ 31.205420] Last potentially related work creation: [ 31.206008] kasan_save_stack+0x22/0x50 [ 31.206513] __kasan_record_aux_stack+0x8e/0xa0 [ 31.207086] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.207723] remove_vma+0x139/0x170 [ 31.208183] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.208746] do_vmi_munmap+0x1f1/0x2b0 [ 31.209232] __vm_munmap+0x138/0x3a0 [ 31.209704] __x64_sys_munmap+0x59/0x80 [ 31.210220] do_syscall_64+0x3f/0x90 [ 31.210701] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.211342] [ 31.211556] Second to last potentially related work creation: [ 31.212241] kasan_save_stack+0x22/0x50 [ 31.212740] __kasan_record_aux_stack+0x8e/0xa0 [ 31.213316] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.214022] remove_vma+0x139/0x170 [ 31.214513] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.215081] do_vmi_munmap+0x1f1/0x2b0 [ 31.215603] __vm_munmap+0x138/0x3a0 [ 31.216071] elf_map+0x26f/0x310 [ 31.216518] load_elf_binary+0xd82/0x5030 [ 31.217031] bprm_execve+0x803/0x1940 [ 31.217492] do_execveat_common+0x734/0x8e0 [ 31.218016] __x64_sys_execve+0x93/0xc0 [ 31.218504] do_syscall_64+0x3f/0x90 [ 31.218988] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.219635] [ 31.219846] The buggy address belongs to the object at ffff8880094aa488 [ 31.219846] which belongs to the cache vm_area_struct of size 168 [ 31.221303] The buggy address is located 88 bytes inside of [ 31.221303] freed 168-byte region [ffff8880094aa488, ffff8880094aa530) [ 31.222709] [ 31.222930] The buggy address belongs to the physical page: [ 31.223573] page:00000000e32db13d refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880094aa000 pfn:0x94aa [ 31.224777] memcg:ffff88800db22d01 [ 31.225199] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.225884] page_type: 0xffffffff() [ 31.226335] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.227239] raw: ffff8880094aa000 0000000080110010 00000001ffffffff ffff88800db22d01 [ 31.228138] page dumped because: kasan: bad access detected [ 31.228782] [ 31.228994] Memory state around the buggy address: [ 31.229559] ffff8880094aa380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.230408] ffff8880094aa400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.231250] >ffff8880094aa480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.232087] ^ [ 31.232836] ffff8880094aa500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.233683] ffff8880094aa580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.234538] ================================================================== [ 31.235506] Disabling lock debugging due to kernel taint [ 33.203971] BUG: Bad rss-counter state mm:00000000fa240203 type:MM_FILEPAGES val:33 [ 33.205339] BUG: Bad rss-counter state mm:00000000fa240203 type:MM_ANONPAGES val:22 [ 33.687230] BUG: Bad rss-counter state mm:00000000d7761f0e type:MM_FILEPAGES val:33 [ 33.688411] BUG: Bad rss-counter state mm:00000000d7761f0e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26693' (ECDSA) to the list of known hosts. 2023/06/20 11:58:15 fuzzer started 2023/06/20 11:58:16 dialing manager at localhost:36067 2023/06/20 11:58:16 checking machine... 2023/06/20 11:58:16 checking revisions... [ 34.461254] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:58:16 testing simple program... [ 34.506297] cgroup: Unknown subsys name 'net' [ 34.549200] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:58:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800947e508 RCX=1ffff1100344fbd6 RDX=1ffff1100128fca1 RSI=ffffffff87b89f80 RDI=ffff88800d9d33e0 RBP=ffff88800947e5f0 RSP=ffff88806ce09de8 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=00000000000b6a61 R12=0000000000000283 R13=ffff88800d9d33d8 R14=ffffffff818d9c06 R15=ffff88800da2fd80 RIP=ffffffff84519679 RFL=00000046 [---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 00007fb322212900 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=00007fb3227c7650 CR3=000000001364c000 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=38353a3131203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3133325b646873732035313a3835 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363036 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100139b58f RBX=ffff888009cdac48 RCX=1ffff1100132a4f8 RDX=dffffc0000000000 RSI=ffff8880099621d0 RDI=ffff888009cdac78 RBP=ffff888009dfb798 RSP=ffff888014317a28 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888009962000 R13=0000000000000000 R14=ffff88800e579898 R15=ffff88800e579850 RIP=ffffffff8184767e RFL=00000046 [---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 00007f21b5ac6900 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=00007f21b4efc1f0 CR3=000000000982e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=84be8d0c19c13b6b00000000000ae988 XMM05=b41089f646e48b1400000000001345b8 XMM06=3183dc12b562890a0000000000133358 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000