syzkaller login: [ 31.050594] BUG: Bad rss-counter state mm:000000007cc3eb8f type:MM_FILEPAGES val:33 [ 31.052064] BUG: Bad rss-counter state mm:000000007cc3eb8f type:MM_ANONPAGES val:22 [ 31.213320] ================================================================== [ 31.214255] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.215200] Read of size 8 at addr ffff888019f1b4e0 by task sshd/227 [ 31.215978] [ 31.216194] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.217158] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.218148] Call Trace: [ 31.218500] [ 31.218790] dump_stack_lvl+0x91/0xf0 [ 31.219284] print_report+0xcc/0x620 [ 31.219762] ? __virt_addr_valid+0x102/0x340 [ 31.220327] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.220948] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.221576] kasan_report+0xbe/0xf0 [ 31.222061] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.222684] vma_interval_tree_remove+0xc75/0xec0 [ 31.223291] vma_prepare+0xc54/0x11a0 [ 31.223771] __split_vma+0x5af/0x950 [ 31.224249] ? __pfx___split_vma+0x10/0x10 [ 31.224794] ? find_held_lock+0x2c/0x110 [ 31.225330] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.225908] ? lock_is_held_type+0x9f/0x120 [ 31.226452] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.227061] ? mtree_range_walk+0x632/0x900 [ 31.227612] ? mas_walk+0x5c7/0x7c0 [ 31.228084] do_vmi_munmap+0x1f1/0x2b0 [ 31.228583] mmap_region+0x1f9/0x2660 [ 31.229064] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.229589] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.230320] ? __pfx_lock_acquire+0x10/0x10 [ 31.230852] ? __pfx_mmap_region+0x10/0x10 [ 31.231384] ? security_mmap_addr+0x7d/0xa0 [ 31.231922] ? get_unmapped_area+0x1f5/0x3f0 [ 31.232473] do_mmap+0x854/0xf00 [ 31.232925] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.233418] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.234003] ksys_mmap_pgoff+0x3af/0x500 [ 31.234522] do_syscall_64+0x3f/0x90 [ 31.234997] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.235653] RIP: 0033:0x7f2ea8cd3d82 [ 31.236115] 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 [ 31.238264] RSP: 002b:00007fff81c2a5d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.239193] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2ea8cd3d82 [ 31.240040] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2ea810d000 [ 31.240893] RBP: 00007f2ea810d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.241752] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556aed9a7b20 [ 31.242605] R13: 00007fff81c2a5f0 R14: 00007fff81c2a620 R15: 00007fff81c2a980 [ 31.243467] [ 31.243757] [ 31.243970] Allocated by task 220: [ 31.244402] kasan_save_stack+0x22/0x50 [ 31.244910] kasan_set_track+0x25/0x30 [ 31.245409] __kasan_slab_alloc+0x59/0x70 [ 31.245944] kmem_cache_alloc+0x16b/0x370 [ 31.246476] vm_area_dup+0x20/0x160 [ 31.246937] __split_vma+0x170/0x950 [ 31.247404] split_vma+0xc6/0x110 [ 31.247851] mprotect_fixup+0x8d2/0xb30 [ 31.248361] do_mprotect_pkey+0x87e/0xd40 [ 31.248890] __x64_sys_mprotect+0x78/0xc0 [ 31.249431] do_syscall_64+0x3f/0x90 [ 31.249930] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.250577] [ 31.250795] Freed by task 220: [ 31.251183] kasan_save_stack+0x22/0x50 [ 31.251685] kasan_set_track+0x25/0x30 [ 31.252182] kasan_save_free_info+0x2b/0x50 [ 31.252723] __kasan_slab_free+0x10a/0x190 [ 31.253257] kmem_cache_free+0x10d/0x4d0 [ 31.253786] rcu_core+0x8c8/0x2860 [ 31.254227] __do_softirq+0x1b7/0x7d4 [ 31.254708] [ 31.254923] Last potentially related work creation: [ 31.255511] kasan_save_stack+0x22/0x50 [ 31.256011] __kasan_record_aux_stack+0x8e/0xa0 [ 31.256590] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.257236] remove_vma+0x139/0x170 [ 31.257702] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.258265] do_vmi_munmap+0x1f1/0x2b0 [ 31.258755] __vm_munmap+0x138/0x3a0 [ 31.259224] __x64_sys_munmap+0x59/0x80 [ 31.259727] do_syscall_64+0x3f/0x90 [ 31.260203] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.260854] [ 31.261068] The buggy address belongs to the object at ffff888019f1b488 [ 31.261068] which belongs to the cache vm_area_struct of size 168 [ 31.262566] The buggy address is located 88 bytes inside of [ 31.262566] freed 168-byte region [ffff888019f1b488, ffff888019f1b530) [ 31.263982] [ 31.264207] The buggy address belongs to the physical page: [ 31.264878] page:00000000960e6b7a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f1b [ 31.265979] memcg:ffff888018da8d01 [ 31.266413] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.267074] page_type: 0xffffffff() [ 31.267526] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.268458] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018da8d01 [ 31.269378] page dumped because: kasan: bad access detected [ 31.270056] [ 31.270276] Memory state around the buggy address: [ 31.270891] ffff888019f1b380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.271821] ffff888019f1b400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.272738] >ffff888019f1b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.273666] ^ [ 31.274466] ffff888019f1b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.275379] ffff888019f1b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.276293] ================================================================== [ 31.277323] Disabling lock debugging due to kernel taint [ 33.638716] BUG: Bad rss-counter state mm:0000000046674a61 type:MM_FILEPAGES val:33 [ 33.640080] BUG: Bad rss-counter state mm:0000000046674a61 type:MM_ANONPAGES val:22 [ 34.020289] BUG: Bad rss-counter state mm:00000000cc32d216 type:MM_FILEPAGES val:33 [ 34.020975] BUG: Bad rss-counter state mm:00000000cc32d216 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14836' (ECDSA) to the list of known hosts. 2023/06/20 16:07:13 fuzzer started 2023/06/20 16:07:13 dialing manager at localhost:36067 2023/06/20 16:07:13 checking machine... 2023/06/20 16:07:13 checking revisions... [ 34.737873] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:07:13 testing simple program... [ 34.777819] cgroup: Unknown subsys name 'net' [ 34.819969] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:07:13 Registers: info registers vcpu 0 RAX=0000000000000040 RBX=ffff888014667400 RCX=0000000000000001 RDX=1ffff110028cce91 RSI=ffffffff818083e8 RDI=ffff88801466740c RBP=ffff888014667488 RSP=ffff888014667318 R8 =0000000000000001 R9 =ffff888014667378 R10=0000000000038001 R11=0000000000020de5 R12=ffff888014667400 R13=0000000000000000 R14=ffff888014573680 R15=0000000000400cc0 RIP=ffffffff813ad553 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 00007f76320ef900 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=0000564b57856318 CR3=000000000d662000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=dfb4dbb189232da800000000000ae988 XMM05=8cf5736a3f1cc21000000000001327c0 XMM06=16bbfc4fa606b62500000000001315b8 XMM07=fb795ef6d65770560000000000121a40 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20000000000000000000000000200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff87f97640 RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000dc0 RDI=ffffffff85beb1c0 RBP=ffffffff85beb1c0 RSP=ffff8880102afd68 R8 =0000000000000000 R9 =0000000000000001 R10=0000000000000002 R11=00000000000b6a61 R12=0000000000000cc0 R13=0000000000000000 R14=0000000000000001 R15=0000000000000024 RIP=ffffffff83644242 RFL=00000206 [-----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 00007f52846b8900 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=00007f5284c6d650 CR3=000000000e918000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000