syzkaller login: [ 34.047307] BUG: Bad rss-counter state mm:000000005bbd977c type:MM_FILEPAGES val:33 [ 34.048437] BUG: Bad rss-counter state mm:000000005bbd977c type:MM_ANONPAGES val:22 [ 34.208038] ================================================================== [ 34.208972] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.209931] Read of size 8 at addr ffff88801a1ae880 by task sshd/220 [ 34.210699] [ 34.210915] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.211882] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.212857] Call Trace: [ 34.213183] <TASK> [ 34.213504] dump_stack_lvl+0x91/0xf0 [ 34.214008] print_report+0xcc/0x620 [ 34.214498] ? __virt_addr_valid+0x102/0x340 [ 34.215049] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.215667] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.216288] kasan_report+0xbe/0xf0 [ 34.216772] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.217394] vma_interval_tree_remove+0xc75/0xec0 [ 34.218015] vma_prepare+0xc54/0x11a0 [ 34.218534] __split_vma+0x5af/0x950 [ 34.219029] ? __pfx___split_vma+0x10/0x10 [ 34.219569] ? find_held_lock+0x2c/0x110 [ 34.220092] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.220656] ? lock_is_held_type+0x9f/0x120 [ 34.221194] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.221803] ? mtree_range_walk+0x632/0x900 [ 34.222349] ? mas_walk+0x5c7/0x7c0 [ 34.222822] do_vmi_munmap+0x1f1/0x2b0 [ 34.223316] mmap_region+0x1f9/0x2660 [ 34.223797] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.224309] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.225020] ? __pfx_lock_acquire+0x10/0x10 [ 34.225573] ? __pfx_mmap_region+0x10/0x10 [ 34.226103] ? security_mmap_addr+0x7d/0xa0 [ 34.226637] ? get_unmapped_area+0x1f5/0x3f0 [ 34.227189] do_mmap+0x854/0xf00 [ 34.227627] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.228121] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.228682] ksys_mmap_pgoff+0x3af/0x500 [ 34.229188] do_syscall_64+0x3f/0x90 [ 34.229683] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.230335] RIP: 0033:0x7f5da5ce5d82 [ 34.230789] 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 [ 34.232903] RSP: 002b:00007ffff0fc60b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.233821] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5da5ce5d82 [ 34.234667] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5da511f000 [ 34.235512] RBP: 00007f5da511f000 R08: 0000000000000009 R09: 0000000000001000 [ 34.236361] R10: 0000000000000812 R11: 0000000000000206 R12: 000056332ffe8d90 [ 34.237200] R13: 00007ffff0fc60d0 R14: 00007ffff0fc6100 R15: 00007ffff0fc6460 [ 34.238082] </TASK> [ 34.238374] [ 34.238594] Allocated by task 213: [ 34.239030] kasan_save_stack+0x22/0x50 [ 34.239535] kasan_set_track+0x25/0x30 [ 34.240026] __kasan_slab_alloc+0x59/0x70 [ 34.240551] kmem_cache_alloc+0x16b/0x370 [ 34.241063] vm_area_dup+0x20/0x160 [ 34.241517] __split_vma+0x170/0x950 [ 34.241990] split_vma+0xc6/0x110 [ 34.242425] mprotect_fixup+0x8d2/0xb30 [ 34.242928] do_mprotect_pkey+0x87e/0xd40 [ 34.243451] __x64_sys_mprotect+0x78/0xc0 [ 34.243984] do_syscall_64+0x3f/0x90 [ 34.244456] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.245096] [ 34.245313] Freed by task 19: [ 34.245713] kasan_save_stack+0x22/0x50 [ 34.246218] kasan_set_track+0x25/0x30 [ 34.246717] kasan_save_free_info+0x2b/0x50 [ 34.247249] __kasan_slab_free+0x10a/0x190 [ 34.247781] kmem_cache_free+0x10d/0x4d0 [ 34.248288] rcu_core+0x8c8/0x2860 [ 34.248738] __do_softirq+0x1b7/0x7d4 [ 34.249216] [ 34.249435] Last potentially related work creation: [ 34.250024] kasan_save_stack+0x22/0x50 [ 34.250533] __kasan_record_aux_stack+0x8e/0xa0 [ 34.251114] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.251762] remove_vma+0x139/0x170 [ 34.252319] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.252886] do_vmi_munmap+0x1f1/0x2b0 [ 34.253369] __vm_munmap+0x138/0x3a0 [ 34.253862] __x64_sys_munmap+0x59/0x80 [ 34.254358] do_syscall_64+0x3f/0x90 [ 34.254827] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.255468] [ 34.255682] The buggy address belongs to the object at ffff88801a1ae828 [ 34.255682] which belongs to the cache vm_area_struct of size 168 [ 34.257172] The buggy address is located 88 bytes inside of [ 34.257172] freed 168-byte region [ffff88801a1ae828, ffff88801a1ae8d0) [ 34.258591] [ 34.258807] The buggy address belongs to the physical page: [ 34.259467] page:00000000cdc21425 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1ae [ 34.260564] memcg:ffff88801a341001 [ 34.261000] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.261658] page_type: 0xffffffff() [ 34.262109] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.263032] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a341001 [ 34.263939] page dumped because: kasan: bad access detected [ 34.264601] [ 34.264818] Memory state around the buggy address: [ 34.265404] ffff88801a1ae780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 34.266268] ffff88801a1ae800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.267139] >ffff88801a1ae880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.267996] ^ [ 34.268417] ffff88801a1ae900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.269269] ffff88801a1ae980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 34.270128] ================================================================== [ 34.271062] Disabling lock debugging due to kernel taint [ 36.535833] BUG: Bad rss-counter state mm:000000003ad97ef5 type:MM_FILEPAGES val:33 [ 36.537085] BUG: Bad rss-counter state mm:000000003ad97ef5 type:MM_ANONPAGES val:22 [ 36.944745] BUG: Bad rss-counter state mm:000000004ecd79f5 type:MM_FILEPAGES val:33 [ 36.945833] BUG: Bad rss-counter state mm:000000004ecd79f5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10917' (ECDSA) to the list of known hosts. 2023/06/20 05:04:33 fuzzer started 2023/06/20 05:04:33 dialing manager at localhost:44161 2023/06/20 05:04:33 checking machine... 2023/06/20 05:04:33 checking revisions... [ 37.695158] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:04:33 testing simple program... [ 37.758506] cgroup: Unknown subsys name 'net' [ 37.842596] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:04:29 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800e8c4c80 RCX=ffffffff81864fb6 RDX=ffff8880146f3680 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff88800e8c4c80 RSP=ffff88800f53fea0 R8 =0000000000000007 R9 =0000000000000000 R10=ffff88800e8c4c80 R11=0000000000000000 R12=1ffff11001ea7fd5 R13=0000559b7c464f40 R14=dffffc0000000000 R15=0000000000001000 RIP=ffffffff814c07eb RFL=00000282 [--S----] 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 00007fadf2b04900 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=00007fadf30bc0b0 CR3=000000000e2b6000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff818470db RDX=0000000000008470 RSI=0000000000008470 RDI=ffffffff86508d80 RBP=ffff88800d8472e0 RSP=ffff88800d847218 R8 =0000000000000000 R9 =ffff88800d8472c8 R10=0000000000038001 R11=0000000000021edf R12=ffff88800d8472e8 R13=ffff88800d8472d0 R14=ffff88800d8472c9 R15=ffff88800d847288 RIP=ffffffff811307c2 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 00007f4d2d9ec900 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=00007f4d2ce6f8a0 CR3=000000000ca76000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=ab280cc214dbcd9800000000000ae988 XMM05=40a6673053b30b570000000000135c60 XMM06=4fda316b135da52b0000000000134a50 XMM07=fb795ef6d65770560000000000124fe0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000