syzkaller login: [ 23.996786] BUG: Bad rss-counter state mm:00000000a8769877 type:MM_FILEPAGES val:33 [ 23.997956] BUG: Bad rss-counter state mm:00000000a8769877 type:MM_ANONPAGES val:22 [ 24.129592] ================================================================== [ 24.130314] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.131141] Read of size 8 at addr ffff88800dc6aed8 by task sshd/220 [ 24.131849] [ 24.132017] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.132664] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.133597] Call Trace: [ 24.133842] [ 24.134063] dump_stack_lvl+0x91/0xf0 [ 24.134469] print_report+0xcc/0x620 [ 24.134845] ? __virt_addr_valid+0x102/0x340 [ 24.135286] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.135760] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.136228] kasan_report+0xbe/0xf0 [ 24.136616] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.137121] vma_interval_tree_remove+0xc75/0xec0 [ 24.137597] vma_prepare+0xc54/0x11a0 [ 24.137964] __split_vma+0x5af/0x950 [ 24.138323] ? __pfx___split_vma+0x10/0x10 [ 24.138744] ? find_held_lock+0x2c/0x110 [ 24.139145] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.139577] ? lock_is_held_type+0x9f/0x120 [ 24.140016] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.140485] ? mtree_range_walk+0x632/0x900 [ 24.140943] ? mas_walk+0x5c7/0x7c0 [ 24.141313] do_vmi_munmap+0x1f1/0x2b0 [ 24.141694] mmap_region+0x1f9/0x2660 [ 24.142130] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.142617] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.143294] ? __pfx_lock_acquire+0x10/0x10 [ 24.143808] ? __pfx_mmap_region+0x10/0x10 [ 24.144319] ? security_mmap_addr+0x7d/0xa0 [ 24.144743] ? get_unmapped_area+0x1f5/0x3f0 [ 24.145174] do_mmap+0x854/0xf00 [ 24.145513] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.145890] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.146322] ksys_mmap_pgoff+0x3af/0x500 [ 24.146712] do_syscall_64+0x3f/0x90 [ 24.147083] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.147584] RIP: 0033:0x7f1aaff8bd82 [ 24.147935] 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 [ 24.149585] RSP: 002b:00007ffffa0bb0e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.150280] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1aaff8bd82 [ 24.150933] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1aaf3c5000 [ 24.151575] RBP: 00007f1aaf3c5000 R08: 0000000000000009 R09: 0000000000001000 [ 24.152221] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564060b00d90 [ 24.152868] R13: 00007ffffa0bb100 R14: 00007ffffa0bb130 R15: 00007ffffa0bb490 [ 24.153536] [ 24.153761] [ 24.153923] Allocated by task 213: [ 24.154256] kasan_save_stack+0x22/0x50 [ 24.154643] kasan_set_track+0x25/0x30 [ 24.155027] __kasan_slab_alloc+0x59/0x70 [ 24.155425] kmem_cache_alloc+0x16b/0x370 [ 24.155821] vm_area_dup+0x20/0x160 [ 24.156171] __split_vma+0x170/0x950 [ 24.156526] split_vma+0xc6/0x110 [ 24.156863] mprotect_fixup+0x8d2/0xb30 [ 24.157264] do_mprotect_pkey+0x87e/0xd40 [ 24.157669] __x64_sys_mprotect+0x78/0xc0 [ 24.158069] do_syscall_64+0x3f/0x90 [ 24.158433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.158930] [ 24.159094] Freed by task 213: [ 24.159391] kasan_save_stack+0x22/0x50 [ 24.159778] kasan_set_track+0x25/0x30 [ 24.160154] kasan_save_free_info+0x2b/0x50 [ 24.160558] __kasan_slab_free+0x10a/0x190 [ 24.160976] kmem_cache_free+0x10d/0x4d0 [ 24.161365] rcu_core+0x8c8/0x2860 [ 24.161704] __do_softirq+0x1b7/0x7d4 [ 24.162070] [ 24.162234] Last potentially related work creation: [ 24.162677] kasan_save_stack+0x22/0x50 [ 24.163067] __kasan_record_aux_stack+0x8e/0xa0 [ 24.163504] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.163997] remove_vma+0x139/0x170 [ 24.164342] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.164775] do_vmi_munmap+0x1f1/0x2b0 [ 24.165165] __vm_munmap+0x138/0x3a0 [ 24.165519] __x64_sys_munmap+0x59/0x80 [ 24.165902] do_syscall_64+0x3f/0x90 [ 24.166263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.166762] [ 24.166927] The buggy address belongs to the object at ffff88800dc6ae80 [ 24.166927] which belongs to the cache vm_area_struct of size 168 [ 24.168059] The buggy address is located 88 bytes inside of [ 24.168059] freed 168-byte region [ffff88800dc6ae80, ffff88800dc6af28) [ 24.169167] [ 24.169333] The buggy address belongs to the physical page: [ 24.169838] page:000000008e8c4427 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc6a [ 24.170671] memcg:ffff88800c74b801 [ 24.171000] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.171493] page_type: 0xffffffff() [ 24.171838] raw: 0100000000000200 ffff8880087a0c80 ffffea0000370400 dead000000000008 [ 24.172540] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c74b801 [ 24.173248] page dumped because: kasan: bad access detected [ 24.173759] [ 24.173924] Memory state around the buggy address: [ 24.174369] ffff88800dc6ad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.175030] ffff88800dc6ae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 24.175687] >ffff88800dc6ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.176345] ^ [ 24.176915] ffff88800dc6af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 24.177570] ffff88800dc6af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.178222] ================================================================== [ 24.178959] Disabling lock debugging due to kernel taint [ 26.153533] BUG: Bad rss-counter state mm:00000000c77f6171 type:MM_FILEPAGES val:33 [ 26.154482] BUG: Bad rss-counter state mm:00000000c77f6171 type:MM_ANONPAGES val:22 [ 26.683770] BUG: Bad rss-counter state mm:0000000025545347 type:MM_FILEPAGES val:33 [ 26.685004] BUG: Bad rss-counter state mm:0000000025545347 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3076' (ECDSA) to the list of known hosts. 2023/06/21 07:19:51 fuzzer started 2023/06/21 07:19:52 dialing manager at localhost:36067 2023/06/21 07:19:52 checking machine... 2023/06/21 07:19:52 checking revisions... [ 27.402502] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:19:52 testing simple program... [ 27.461225] cgroup: Unknown subsys name 'net' [ 27.549351] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:19:51 Registers: info registers vcpu 0 RAX=ffffffff864b37a7 RBX=0000000000000001 RCX=ffffffff864b37a2 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b37a6 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b546d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130ab5 RFL=00000297 [--S-APC] 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=00007f4a8fa1bb10 CR3=00000000102b4000 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=af01ca3d00edf3a2e54516d8447b5a95 XMM02=000000000011acc8ec2efd57dc4c00df XMM03=0000000000121d80894fa5e9cc110d18 XMM04=a9eb7d805bba13f400000000000ae988 XMM05=19e9129bd510f2350000000000131c00 XMM06=38aaab36200ebc820000000000130dd8 XMM07=e042d86d42eb936e0000000000122000 XMM08=894fa5e9cc110d18000000000011ad28 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888016c677c0 RBX=ffff8880193551c0 RCX=ffff88806cf0a000 RDX=ffff88806cf02000 RSI=ffff8880193551c0 RDI=ffff88806cf099d0 RBP=ffff88806cf09a20 RSP=ffff88806cf09998 R8 =0000000000000100 R9 =0000000000000000 R10=ffff88806cf09a20 R11=00000000000b6a61 R12=ffff88806cf099d0 R13=ffff88806cf09a48 R14=ffff88806cf09a68 R15=ffff88806cf09a20 RIP=ffffffff8450e147 RFL=00000283 [--S---C] 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 00007f9e0bb69900 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=00007f9e0c120618 CR3=000000001a24e000 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