syzkaller login: [ 61.010027] BUG: Bad rss-counter state mm:0000000014d576e6 type:MM_FILEPAGES val:33 [ 61.010788] BUG: Bad rss-counter state mm:0000000014d576e6 type:MM_ANONPAGES val:22 [ 61.206439] ================================================================== [ 61.207032] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.208997] Read of size 8 at addr ffff888008c7d058 by task sshd/221 [ 61.209488] [ 61.209626] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.210161] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.210769] Call Trace: [ 61.210973] [ 61.211162] dump_stack_lvl+0x91/0xf0 [ 61.211479] print_report+0xcc/0x620 [ 61.211791] ? __virt_addr_valid+0x102/0x340 [ 61.212145] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.212528] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.216973] kasan_report+0xbe/0xf0 [ 61.217278] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.217668] vma_interval_tree_remove+0xc75/0xec0 [ 61.218079] vma_prepare+0xc54/0x11a0 [ 61.218387] __split_vma+0x5af/0x950 [ 61.218708] ? __pfx___split_vma+0x10/0x10 [ 61.219051] ? find_held_lock+0x2c/0x110 [ 61.219384] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.219739] ? lock_is_held_type+0x9f/0x120 [ 61.220087] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.220472] ? mtree_range_walk+0x632/0x900 [ 61.220883] ? mas_walk+0x5c7/0x7c0 [ 61.221220] do_vmi_munmap+0x1f1/0x2b0 [ 61.221535] mmap_region+0x1f9/0x2660 [ 61.221845] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.222181] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.222642] ? __pfx_lock_acquire+0x10/0x10 [ 61.222995] ? __pfx_mmap_region+0x10/0x10 [ 61.223337] ? security_mmap_addr+0x7d/0xa0 [ 61.223677] ? get_unmapped_area+0x1f5/0x3f0 [ 61.224039] do_mmap+0x854/0xf00 [ 61.224325] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.224649] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.227218] ksys_mmap_pgoff+0x3af/0x500 [ 61.227519] do_syscall_64+0x3f/0x90 [ 61.227800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.228198] RIP: 0033:0x7f7055696d82 [ 61.228464] 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 [ 61.229771] RSP: 002b:00007ffe1088aaf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.230338] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7055696d82 [ 61.230826] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7054ad0000 [ 61.231378] RBP: 00007f7054ad0000 R08: 0000000000000009 R09: 0000000000001000 [ 61.231882] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559d836bdec0 [ 61.232388] R13: 00007ffe1088ab10 R14: 00007ffe1088ab40 R15: 00007ffe1088aea0 [ 61.232911] [ 61.233139] [ 61.233265] Allocated by task 214: [ 61.233515] kasan_save_stack+0x22/0x50 [ 61.233811] kasan_set_track+0x25/0x30 [ 61.234123] __kasan_slab_alloc+0x59/0x70 [ 61.234426] kmem_cache_alloc+0x16b/0x370 [ 61.234725] vm_area_dup+0x20/0x160 [ 61.235000] __split_vma+0x170/0x950 [ 61.235282] split_vma+0xc6/0x110 [ 61.235538] mprotect_fixup+0x8d2/0xb30 [ 61.235839] do_mprotect_pkey+0x87e/0xd40 [ 61.236112] __x64_sys_mprotect+0x78/0xc0 [ 61.236369] do_syscall_64+0x3f/0x90 [ 61.236604] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.237021] [ 61.237164] Freed by task 13: [ 61.237400] kasan_save_stack+0x22/0x50 [ 61.237708] kasan_set_track+0x25/0x30 [ 61.238035] kasan_save_free_info+0x2b/0x50 [ 61.238376] __kasan_slab_free+0x10a/0x190 [ 61.238709] kmem_cache_free+0x10d/0x4d0 [ 61.239052] rcu_core+0x8c8/0x2860 [ 61.239343] __do_softirq+0x1b7/0x7d4 [ 61.239654] [ 61.239794] Last potentially related work creation: [ 61.240196] kasan_save_stack+0x22/0x50 [ 61.240784] __kasan_record_aux_stack+0x8e/0xa0 [ 61.241138] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.241538] remove_vma+0x139/0x170 [ 61.241819] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.242160] do_vmi_munmap+0x1f1/0x2b0 [ 61.242458] __vm_munmap+0x138/0x3a0 [ 61.242753] __x64_sys_munmap+0x59/0x80 [ 61.243076] do_syscall_64+0x3f/0x90 [ 61.243383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.243797] [ 61.243937] The buggy address belongs to the object at ffff888008c7d000 [ 61.243937] which belongs to the cache vm_area_struct of size 168 [ 61.246807] The buggy address is located 88 bytes inside of [ 61.246807] freed 168-byte region [ffff888008c7d000, ffff888008c7d0a8) [ 61.247731] [ 61.247873] The buggy address belongs to the physical page: [ 61.248299] page:000000003a079a86 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8c7d [ 61.249027] memcg:ffff88800e8bb301 [ 61.249304] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.249722] page_type: 0xffffffff() [ 61.250138] raw: 0100000000000200 ffff8880087a0c80 ffffea000036cb40 dead000000000008 [ 61.250950] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8bb301 [ 61.251919] page dumped because: kasan: bad access detected [ 61.252521] [ 61.252752] Memory state around the buggy address: [ 61.253300] ffff888008c7cf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 61.254056] ffff888008c7cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 61.254825] >ffff888008c7d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.255673] ^ [ 61.256289] ffff888008c7d080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 61.256940] ffff888008c7d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.257560] ================================================================== [ 61.258339] Disabling lock debugging due to kernel taint [ 65.876958] BUG: Bad rss-counter state mm:00000000d69f0141 type:MM_FILEPAGES val:33 [ 65.878449] BUG: Bad rss-counter state mm:00000000d69f0141 type:MM_ANONPAGES val:22 [ 66.378149] BUG: Bad rss-counter state mm:00000000f27fcbe3 type:MM_FILEPAGES val:33 [ 66.379079] BUG: Bad rss-counter state mm:00000000f27fcbe3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8435' (ECDSA) to the list of known hosts. 2023/06/21 09:59:31 fuzzer started 2023/06/21 09:59:32 dialing manager at localhost:36067 2023/06/21 09:59:32 checking machine... 2023/06/21 09:59:32 checking revisions... [ 67.292805] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:59:32 testing simple program... [ 67.324122] cgroup: Unknown subsys name 'net' [ 67.396263] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:59:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8180c6a1 RDX=dffffc0000000000 RSI=ffffffff8180c6a2 RDI=ffff88801832f598 RBP=ffff88801832f5f0 RSP=ffff88801832f528 R8 =ffffffff860d825a R9 =ffff88801832f5d8 R10=0000000000038001 R11=0000000000010b8d R12=ffff88801832f5f8 R13=ffff88801832f5e0 R14=ffff88801832f5d9 R15=ffff88801832f598 RIP=ffffffff81130733 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 00007f84f606b900 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=00007f84f606b6f8 CR3=00000000168c0000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000046 [---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 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=00007f072f1fb328 CR3=0000000005482000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000