syzkaller login: [ 30.121131] BUG: Bad rss-counter state mm:00000000dd1a06ef type:MM_FILEPAGES val:33 [ 30.122559] BUG: Bad rss-counter state mm:00000000dd1a06ef type:MM_ANONPAGES val:22 [ 30.270940] ================================================================== [ 30.271887] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.272839] Read of size 8 at addr ffff88800d837058 by task sshd/220 [ 30.273610] [ 30.273900] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.274785] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.275785] Call Trace: [ 30.276116] [ 30.276416] dump_stack_lvl+0x91/0xf0 [ 30.276920] print_report+0xcc/0x620 [ 30.277414] ? __virt_addr_valid+0x102/0x340 [ 30.277991] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.278612] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.279244] kasan_report+0xbe/0xf0 [ 30.279721] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.280347] vma_interval_tree_remove+0xc75/0xec0 [ 30.280949] vma_prepare+0xc54/0x11a0 [ 30.281438] __split_vma+0x5af/0x950 [ 30.281924] ? __pfx___split_vma+0x10/0x10 [ 30.282479] ? find_held_lock+0x2c/0x110 [ 30.283003] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.283571] ? lock_is_held_type+0x9f/0x120 [ 30.284108] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.284721] ? mtree_range_walk+0x632/0x900 [ 30.285280] ? mas_walk+0x5c7/0x7c0 [ 30.285770] do_vmi_munmap+0x1f1/0x2b0 [ 30.286486] mmap_region+0x1f9/0x2660 [ 30.287096] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.287723] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.288601] ? __pfx_lock_acquire+0x10/0x10 [ 30.289265] ? __pfx_mmap_region+0x10/0x10 [ 30.289926] ? security_mmap_addr+0x7d/0xa0 [ 30.290631] ? get_unmapped_area+0x1f5/0x3f0 [ 30.291317] do_mmap+0x854/0xf00 [ 30.291861] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.292471] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.293173] ksys_mmap_pgoff+0x3af/0x500 [ 30.293804] do_syscall_64+0x3f/0x90 [ 30.294407] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.295213] RIP: 0033:0x7f553300ed82 [ 30.295777] 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 [ 30.298419] RSP: 002b:00007ffe0966e348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.299529] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f553300ed82 [ 30.300577] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5532448000 [ 30.301622] RBP: 00007f5532448000 R08: 0000000000000009 R09: 0000000000001000 [ 30.302701] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bac40eaf70 [ 30.303540] R13: 00007ffe0966e360 R14: 00007ffe0966e390 R15: 00007ffe0966e6f0 [ 30.304397] [ 30.304693] [ 30.304910] Allocated by task 213: [ 30.305354] kasan_save_stack+0x22/0x50 [ 30.305876] kasan_set_track+0x25/0x30 [ 30.306388] __kasan_slab_alloc+0x59/0x70 [ 30.306913] kmem_cache_alloc+0x16b/0x370 [ 30.307431] vm_area_dup+0x20/0x160 [ 30.307887] __split_vma+0x170/0x950 [ 30.308359] split_vma+0xc6/0x110 [ 30.308802] mprotect_fixup+0x8d2/0xb30 [ 30.309304] do_mprotect_pkey+0x87e/0xd40 [ 30.309836] __x64_sys_mprotect+0x78/0xc0 [ 30.310373] do_syscall_64+0x3f/0x90 [ 30.310846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.311510] [ 30.311728] Freed by task 213: [ 30.312134] kasan_save_stack+0x22/0x50 [ 30.312643] kasan_set_track+0x25/0x30 [ 30.313141] kasan_save_free_info+0x2b/0x50 [ 30.313686] __kasan_slab_free+0x10a/0x190 [ 30.314294] kmem_cache_free+0x10d/0x4d0 [ 30.314834] rcu_core+0x8c8/0x2860 [ 30.315302] __do_softirq+0x1b7/0x7d4 [ 30.315804] [ 30.316032] Last potentially related work creation: [ 30.316651] kasan_save_stack+0x22/0x50 [ 30.317176] __kasan_record_aux_stack+0x8e/0xa0 [ 30.317777] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.318467] remove_vma+0x139/0x170 [ 30.318941] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.319520] do_vmi_munmap+0x1f1/0x2b0 [ 30.320031] __vm_munmap+0x138/0x3a0 [ 30.320528] __x64_sys_munmap+0x59/0x80 [ 30.321054] do_syscall_64+0x3f/0x90 [ 30.321558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.322248] [ 30.322472] Second to last potentially related work creation: [ 30.323188] kasan_save_stack+0x22/0x50 [ 30.323711] __kasan_record_aux_stack+0x8e/0xa0 [ 30.324311] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.324982] remove_vma+0x139/0x170 [ 30.325460] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.326061] do_vmi_munmap+0x1f1/0x2b0 [ 30.326577] mmap_region+0x1f9/0x2660 [ 30.327077] do_mmap+0x854/0xf00 [ 30.327527] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.328038] ksys_mmap_pgoff+0x3af/0x500 [ 30.328570] do_syscall_64+0x3f/0x90 [ 30.329061] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.329733] [ 30.329966] The buggy address belongs to the object at ffff88800d837000 [ 30.329966] which belongs to the cache vm_area_struct of size 168 [ 30.331510] The buggy address is located 88 bytes inside of [ 30.331510] freed 168-byte region [ffff88800d837000, ffff88800d8370a8) [ 30.332979] [ 30.333202] The buggy address belongs to the physical page: [ 30.333893] page:00000000a91b79b8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd837 [ 30.335062] memcg:ffff88800e732f01 [ 30.335504] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.336237] page_type: 0xffffffff() [ 30.336710] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.337665] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e732f01 [ 30.338617] page dumped because: kasan: bad access detected [ 30.339303] [ 30.339530] Memory state around the buggy address: [ 30.340139] ffff88800d836f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.341025] ffff88800d836f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.341914] >ffff88800d837000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.342826] ^ [ 30.343593] ffff88800d837080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.344496] ffff88800d837100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.345379] ================================================================== [ 30.346505] Disabling lock debugging due to kernel taint [ 32.390337] BUG: Bad rss-counter state mm:00000000776be868 type:MM_FILEPAGES val:33 [ 32.391534] BUG: Bad rss-counter state mm:00000000776be868 type:MM_ANONPAGES val:22 [ 32.868502] BUG: Bad rss-counter state mm:00000000ad0ad874 type:MM_FILEPAGES val:33 [ 32.869711] BUG: Bad rss-counter state mm:00000000ad0ad874 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4362' (ECDSA) to the list of known hosts. 2023/06/20 11:59:58 fuzzer started 2023/06/20 11:59:59 dialing manager at localhost:36067 2023/06/20 11:59:59 checking machine... 2023/06/20 11:59:59 checking revisions... [ 33.458951] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:59:59 testing simple program... [ 33.511587] cgroup: Unknown subsys name 'net' [ 33.555983] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:59:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000024 RCX=0000000000000000 RDX=0000000000000024 RSI=ffff88801ac065c0 RDI=ffffffff856f0da0 RBP=ffff88801ac065c0 RSP=ffff888018dbfac8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=0000000000008000 R14=ffffffff856f0da0 R15=ffff888018dbfc48 RIP=ffffffff81894ea4 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 00007f7b49099900 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=00007ffd81e29000 CR3=000000001671e000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff86138e8c RDX=1ffff1100d9e1353 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86138e90 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09de8 R15=ffff88806cf09a98 RIP=ffffffff81131271 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 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=00007feed09ced40 CR3=000000000f2c0000 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=64ab6894d42dafb93f48743e6cbaf3de XMM02=000000000011d9b8eff9b2d0a8fce9cb XMM03=000000000011da882c67c8bc2e329bc3 XMM04=ffe536de03fbc49e00000000000ae988 XMM05=19e9129bd510f23500000000001332c0 XMM06=4a3fddde90fb12050000000000132128 XMM07=e042d86d42eb936e0000000000122370 XMM08=fcda0402d4096b78000000000011da88 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000