syzkaller login: [ 32.069667] BUG: Bad rss-counter state mm:0000000000868e2d type:MM_FILEPAGES val:33 [ 32.070693] BUG: Bad rss-counter state mm:0000000000868e2d type:MM_ANONPAGES val:22 [ 32.240757] ================================================================== [ 32.241859] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.242830] Read of size 8 at addr ffff88801698dd08 by task sshd/220 [ 32.243689] [ 32.243909] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.244771] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.245766] Call Trace: [ 32.246087] [ 32.246369] dump_stack_lvl+0x91/0xf0 [ 32.246862] print_report+0xcc/0x620 [ 32.247347] ? __virt_addr_valid+0x102/0x340 [ 32.247900] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.248513] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.249125] kasan_report+0xbe/0xf0 [ 32.249611] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.250234] vma_interval_tree_remove+0xc75/0xec0 [ 32.250837] vma_prepare+0xc54/0x11a0 [ 32.251319] __split_vma+0x5af/0x950 [ 32.251791] ? __pfx___split_vma+0x10/0x10 [ 32.252315] ? find_held_lock+0x2c/0x110 [ 32.252831] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.253406] ? lock_is_held_type+0x9f/0x120 [ 32.253966] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.254574] ? mtree_range_walk+0x632/0x900 [ 32.255122] ? mas_walk+0x5c7/0x7c0 [ 32.255600] do_vmi_munmap+0x1f1/0x2b0 [ 32.256089] mmap_region+0x1f9/0x2660 [ 32.256576] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.257097] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.257829] ? __pfx_lock_acquire+0x10/0x10 [ 32.258363] ? __pfx_mmap_region+0x10/0x10 [ 32.258901] ? security_mmap_addr+0x7d/0xa0 [ 32.259432] ? get_unmapped_area+0x1f5/0x3f0 [ 32.259981] do_mmap+0x854/0xf00 [ 32.260422] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.260911] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.261481] ksys_mmap_pgoff+0x3af/0x500 [ 32.262006] do_syscall_64+0x3f/0x90 [ 32.262493] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.263144] RIP: 0033:0x7f7eda8b6d82 [ 32.263601] 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 [ 32.265752] RSP: 002b:00007ffd9ea80c68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.266641] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7eda8b6d82 [ 32.267493] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7ed9cf0000 [ 32.268344] RBP: 00007f7ed9cf0000 R08: 0000000000000009 R09: 0000000000001000 [ 32.269189] R10: 0000000000000812 R11: 0000000000000206 R12: 00005618b3d9ed90 [ 32.270048] R13: 00007ffd9ea80c80 R14: 00007ffd9ea80cb0 R15: 00007ffd9ea81010 [ 32.270912] [ 32.271210] [ 32.271423] Allocated by task 213: [ 32.271859] kasan_save_stack+0x22/0x50 [ 32.272363] kasan_set_track+0x25/0x30 [ 32.272858] __kasan_slab_alloc+0x59/0x70 [ 32.273379] kmem_cache_alloc+0x16b/0x370 [ 32.273901] vm_area_dup+0x20/0x160 [ 32.274364] __split_vma+0x170/0x950 [ 32.274833] split_vma+0xc6/0x110 [ 32.275273] mprotect_fixup+0x8d2/0xb30 [ 32.275775] do_mprotect_pkey+0x87e/0xd40 [ 32.276298] __x64_sys_mprotect+0x78/0xc0 [ 32.276821] do_syscall_64+0x3f/0x90 [ 32.277299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.277953] [ 32.278165] Freed by task 203: [ 32.278554] kasan_save_stack+0x22/0x50 [ 32.279060] kasan_set_track+0x25/0x30 [ 32.279556] kasan_save_free_info+0x2b/0x50 [ 32.280087] __kasan_slab_free+0x10a/0x190 [ 32.280621] kmem_cache_free+0x10d/0x4d0 [ 32.281133] rcu_core+0x8c8/0x2860 [ 32.281578] __do_softirq+0x1b7/0x7d4 [ 32.282066] [ 32.282282] Last potentially related work creation: [ 32.282874] kasan_save_stack+0x22/0x50 [ 32.283375] __kasan_record_aux_stack+0x8e/0xa0 [ 32.283950] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.284603] remove_vma+0x139/0x170 [ 32.285055] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.285618] do_vmi_munmap+0x1f1/0x2b0 [ 32.286104] __vm_munmap+0x138/0x3a0 [ 32.286577] __x64_sys_munmap+0x59/0x80 [ 32.287072] do_syscall_64+0x3f/0x90 [ 32.287560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.288227] [ 32.288439] Second to last potentially related work creation: [ 32.289111] kasan_save_stack+0x22/0x50 [ 32.289634] __kasan_record_aux_stack+0x8e/0xa0 [ 32.290208] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.290852] remove_vma+0x139/0x170 [ 32.291314] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.291862] do_vmi_munmap+0x1f1/0x2b0 [ 32.292349] mmap_region+0x1f9/0x2660 [ 32.292822] do_mmap+0x854/0xf00 [ 32.293256] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.293763] ksys_mmap_pgoff+0x3af/0x500 [ 32.294261] do_syscall_64+0x3f/0x90 [ 32.294739] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.295382] [ 32.295594] The buggy address belongs to the object at ffff88801698dcb0 [ 32.295594] which belongs to the cache vm_area_struct of size 168 [ 32.297067] The buggy address is located 88 bytes inside of [ 32.297067] freed 168-byte region [ffff88801698dcb0, ffff88801698dd58) [ 32.298489] [ 32.298704] The buggy address belongs to the physical page: [ 32.299365] page:00000000948824f6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1698d [ 32.300443] memcg:ffff88800c9e2a01 [ 32.300862] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.301561] page_type: 0xffffffff() [ 32.302028] raw: 0100000000000200 ffff8880087a0c80 ffffea00005a63c0 dead000000000003 [ 32.302943] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9e2a01 [ 32.303845] page dumped because: kasan: bad access detected [ 32.304499] [ 32.304718] Memory state around the buggy address: [ 32.305296] ffff88801698dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.306157] ffff88801698dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.307006] >ffff88801698dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.307849] ^ [ 32.308283] ffff88801698dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.309145] ffff88801698de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.310018] ================================================================== [ 32.311063] Disabling lock debugging due to kernel taint [ 34.131856] BUG: Bad rss-counter state mm:00000000d8213354 type:MM_FILEPAGES val:33 [ 34.132841] BUG: Bad rss-counter state mm:00000000d8213354 type:MM_ANONPAGES val:22 [ 34.604131] BUG: Bad rss-counter state mm:000000004966b8e6 type:MM_FILEPAGES val:33 [ 34.605161] BUG: Bad rss-counter state mm:000000004966b8e6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31952' (ECDSA) to the list of known hosts. 2023/06/21 03:24:04 fuzzer started 2023/06/21 03:24:04 dialing manager at localhost:36067 2023/06/21 03:24:04 checking machine... 2023/06/21 03:24:04 checking revisions... [ 35.318411] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:24:04 testing simple program... [ 35.366492] cgroup: Unknown subsys name 'net' [ 35.407600] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:24:04 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85dbd7f8 RCX=ffffffff813ad71f RDX=0000000000000000 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff88806ce099b8 R8 =ffffffff860d8256 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd7f8 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000256 [---ZAP-] 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 00007fe8c11c5900 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=00007fe8c06378f0 CR3=0000000014542000 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=8d6ddc2cc3fbc33600000000000ae988 XMM05=7c0222f48ba72f8d00000000001346c0 XMM06=19e9129bd510f2350000000000133558 XMM07=fb795ef6d65770560000000000122448 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11001f4df30 RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000008 RDI=ffff8880198d9e08 RBP=0000000000000001 RSP=ffff88800fa6f970 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=0000000000000000 R14=ffff8880198d9e08 R15=0000000000000000 RIP=ffffffff812d8f06 RFL=00000256 [---ZAP-] 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 00007f32fec37900 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=00007fff37ba1000 CR3=000000000c6fc000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000