syzkaller login: [ 46.979616] BUG: Bad rss-counter state mm:00000000d629314c type:MM_FILEPAGES val:33 [ 46.981100] BUG: Bad rss-counter state mm:00000000d629314c type:MM_ANONPAGES val:22 [ 47.143125] ================================================================== [ 47.144061] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.145015] Read of size 8 at addr ffff888018ec2ed8 by task sshd/227 [ 47.145816] [ 47.146035] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.147058] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.148039] Call Trace: [ 47.148363] [ 47.148680] dump_stack_lvl+0x91/0xf0 [ 47.149187] print_report+0xcc/0x620 [ 47.149693] ? __virt_addr_valid+0x102/0x340 [ 47.150243] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.150878] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.151500] kasan_report+0xbe/0xf0 [ 47.151992] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.152630] vma_interval_tree_remove+0xc75/0xec0 [ 47.153251] vma_prepare+0xc54/0x11a0 [ 47.153743] __split_vma+0x5af/0x950 [ 47.154252] ? __pfx___split_vma+0x10/0x10 [ 47.154857] ? find_held_lock+0x2c/0x110 [ 47.155378] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.155988] ? lock_is_held_type+0x9f/0x120 [ 47.156528] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.157170] ? mtree_range_walk+0x632/0x900 [ 47.157764] ? mas_walk+0x5c7/0x7c0 [ 47.158243] do_vmi_munmap+0x1f1/0x2b0 [ 47.158765] mmap_region+0x1f9/0x2660 [ 47.159251] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.159782] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.160515] ? __pfx_lock_acquire+0x10/0x10 [ 47.161086] ? __pfx_mmap_region+0x10/0x10 [ 47.161662] ? security_mmap_addr+0x7d/0xa0 [ 47.162203] ? get_unmapped_area+0x1f5/0x3f0 [ 47.162782] do_mmap+0x854/0xf00 [ 47.163248] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.163815] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.164428] ksys_mmap_pgoff+0x3af/0x500 [ 47.165003] do_syscall_64+0x3f/0x90 [ 47.165524] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.166230] RIP: 0033:0x7fbd38249d82 [ 47.166740] 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 [ 47.169100] RSP: 002b:00007fffd317e588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.170092] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbd38249d82 [ 47.171025] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbd37683000 [ 47.171934] RBP: 00007fbd37683000 R08: 0000000000000009 R09: 0000000000001000 [ 47.172809] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a0c8fdeec0 [ 47.173676] R13: 00007fffd317e5a0 R14: 00007fffd317e5d0 R15: 00007fffd317e930 [ 47.174557] [ 47.174868] [ 47.175083] Allocated by task 220: [ 47.175512] kasan_save_stack+0x22/0x50 [ 47.176029] kasan_set_track+0x25/0x30 [ 47.176532] __kasan_slab_alloc+0x59/0x70 [ 47.177120] kmem_cache_alloc+0x16b/0x370 [ 47.177667] vm_area_dup+0x20/0x160 [ 47.178130] __split_vma+0x170/0x950 [ 47.178622] split_vma+0xc6/0x110 [ 47.179073] mprotect_fixup+0x8d2/0xb30 [ 47.179592] do_mprotect_pkey+0x87e/0xd40 [ 47.180138] __x64_sys_mprotect+0x78/0xc0 [ 47.180694] do_syscall_64+0x3f/0x90 [ 47.181191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.181845] [ 47.182065] Freed by task 220: [ 47.182465] kasan_save_stack+0x22/0x50 [ 47.183000] kasan_set_track+0x25/0x30 [ 47.183509] kasan_save_free_info+0x2b/0x50 [ 47.184067] __kasan_slab_free+0x10a/0x190 [ 47.184631] kmem_cache_free+0x10d/0x4d0 [ 47.185176] rcu_core+0x8c8/0x2860 [ 47.185649] __do_softirq+0x1b7/0x7d4 [ 47.186142] [ 47.186356] Last potentially related work creation: [ 47.186964] kasan_save_stack+0x22/0x50 [ 47.187593] __kasan_record_aux_stack+0x8e/0xa0 [ 47.188179] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.188872] remove_vma+0x139/0x170 [ 47.189330] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.189905] do_vmi_munmap+0x1f1/0x2b0 [ 47.190396] __vm_munmap+0x138/0x3a0 [ 47.190881] __x64_sys_munmap+0x59/0x80 [ 47.191377] do_syscall_64+0x3f/0x90 [ 47.191866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.192513] [ 47.192767] The buggy address belongs to the object at ffff888018ec2e80 [ 47.192767] which belongs to the cache vm_area_struct of size 168 [ 47.194250] The buggy address is located 88 bytes inside of [ 47.194250] freed 168-byte region [ffff888018ec2e80, ffff888018ec2f28) [ 47.195684] [ 47.195905] The buggy address belongs to the physical page: [ 47.196561] page:00000000f14de0eb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ec2 [ 47.197727] memcg:ffff888018ec3001 [ 47.198164] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.198828] page_type: 0xffffffff() [ 47.199283] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 47.200231] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018ec3001 [ 47.201169] page dumped because: kasan: bad access detected [ 47.201848] [ 47.202065] Memory state around the buggy address: [ 47.202675] ffff888018ec2d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.203526] ffff888018ec2e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 47.204392] >ffff888018ec2e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.205305] ^ [ 47.206051] ffff888018ec2f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 47.206943] ffff888018ec2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 47.207822] ================================================================== [ 47.208870] Disabling lock debugging due to kernel taint [ 49.723766] BUG: Bad rss-counter state mm:0000000010c32d89 type:MM_FILEPAGES val:33 [ 49.724768] BUG: Bad rss-counter state mm:0000000010c32d89 type:MM_ANONPAGES val:22 [ 50.251582] BUG: Bad rss-counter state mm:00000000c6ad7d40 type:MM_FILEPAGES val:33 [ 50.252553] BUG: Bad rss-counter state mm:00000000c6ad7d40 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41552' (ECDSA) to the list of known hosts. 2023/06/19 18:44:45 fuzzer started 2023/06/19 18:44:45 dialing manager at localhost:44161 2023/06/19 18:44:45 checking machine... 2023/06/19 18:44:45 checking revisions... [ 50.931085] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:44:45 testing simple program... [ 50.973751] cgroup: Unknown subsys name 'net' [ 51.046610] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:44:37 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8180c521 RDX=00000000000080c5 RSI=00000000000080c5 RDI=ffffffff86507ed4 RBP=ffff88801466f368 RSP=ffff88801466f2a0 R8 =0000000000000000 R9 =ffff88801466f350 R10=0000000000038001 R11=0000000000010b7e R12=ffff88801466f370 R13=ffff88801466f358 R14=ffff88801466f351 R15=ffff88801466f310 RIP=ffffffff8113077a RFL=00000213 [----A-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 00007f99991f7900 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=00007f99986561e0 CR3=000000000f11a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=fd11cb356358dc4a00000000000ae988 XMM05=e620e258de1716f30000000000134fb0 XMM06=e8008b1642ea3e600000000000133ce0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100202bf11 RSI=ffffffff81807ebb RDI=ffff88801015f888 RBP=ffff88801015f920 RSP=ffff88801015f860 R8 =0000000000000001 R9 =ffff88801015f8c8 R10=0000000000038001 R11=0000000000020de7 R12=ffff88801015f950 R13=0000000000000000 R14=ffff888019d5d1c0 R15=ffff88801015f888 RIP=ffffffff811305f0 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 00007f8ae0639900 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=00007fff98a25000 CR3=0000000019cf6000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000