syzkaller login: [ 30.065401] BUG: Bad rss-counter state mm:00000000a3c90da0 type:MM_FILEPAGES val:33 [ 30.066404] BUG: Bad rss-counter state mm:00000000a3c90da0 type:MM_ANONPAGES val:22 [ 30.225691] ================================================================== [ 30.226597] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.227541] Read of size 8 at addr ffff88801672c6b0 by task sshd/219 [ 30.228303] [ 30.228521] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.229532] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.230517] Call Trace: [ 30.230844] [ 30.231126] dump_stack_lvl+0x91/0xf0 [ 30.231636] print_report+0xcc/0x620 [ 30.232126] ? __virt_addr_valid+0x102/0x340 [ 30.232676] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.233329] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.233945] kasan_report+0xbe/0xf0 [ 30.234427] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.235049] vma_interval_tree_remove+0xc75/0xec0 [ 30.235658] vma_prepare+0xc54/0x11a0 [ 30.236137] __split_vma+0x5af/0x950 [ 30.236608] ? __pfx___split_vma+0x10/0x10 [ 30.237182] ? find_held_lock+0x2c/0x110 [ 30.237727] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.238289] ? lock_is_held_type+0x9f/0x120 [ 30.238823] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.239439] ? mtree_range_walk+0x632/0x900 [ 30.239996] ? mas_walk+0x5c7/0x7c0 [ 30.240472] do_vmi_munmap+0x1f1/0x2b0 [ 30.240998] mmap_region+0x1f9/0x2660 [ 30.241479] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.242001] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.242717] ? __pfx_lock_acquire+0x10/0x10 [ 30.243253] ? __pfx_mmap_region+0x10/0x10 [ 30.243780] ? security_mmap_addr+0x7d/0xa0 [ 30.244315] ? get_unmapped_area+0x1f5/0x3f0 [ 30.244874] do_mmap+0x854/0xf00 [ 30.245335] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.245835] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.246403] ksys_mmap_pgoff+0x3af/0x500 [ 30.246915] do_syscall_64+0x3f/0x90 [ 30.247396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.248055] RIP: 0033:0x7fda6e9dcd82 [ 30.248514] 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 [ 30.250656] RSP: 002b:00007fff4bfbb588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.251575] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fda6e9dcd82 [ 30.252428] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fda6de16000 [ 30.253288] RBP: 00007fda6de16000 R08: 0000000000000009 R09: 0000000000001000 [ 30.254142] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e04b02cf70 [ 30.254990] R13: 00007fff4bfbb5a0 R14: 00007fff4bfbb5d0 R15: 00007fff4bfbb930 [ 30.255851] [ 30.256149] [ 30.256365] Allocated by task 212: [ 30.256794] kasan_save_stack+0x22/0x50 [ 30.257316] kasan_set_track+0x25/0x30 [ 30.257814] __kasan_slab_alloc+0x59/0x70 [ 30.258333] kmem_cache_alloc+0x16b/0x370 [ 30.258858] vm_area_dup+0x20/0x160 [ 30.259313] __split_vma+0x170/0x950 [ 30.259780] split_vma+0xc6/0x110 [ 30.260213] mprotect_fixup+0x8d2/0xb30 [ 30.260719] do_mprotect_pkey+0x87e/0xd40 [ 30.261256] __x64_sys_mprotect+0x78/0xc0 [ 30.261776] do_syscall_64+0x3f/0x90 [ 30.262256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.262900] [ 30.263118] Freed by task 212: [ 30.263510] kasan_save_stack+0x22/0x50 [ 30.264015] kasan_set_track+0x25/0x30 [ 30.264512] kasan_save_free_info+0x2b/0x50 [ 30.265054] __kasan_slab_free+0x10a/0x190 [ 30.265588] kmem_cache_free+0x10d/0x4d0 [ 30.266098] rcu_core+0x8c8/0x2860 [ 30.266542] __do_softirq+0x1b7/0x7d4 [ 30.267020] [ 30.267238] Last potentially related work creation: [ 30.267829] kasan_save_stack+0x22/0x50 [ 30.268338] __kasan_record_aux_stack+0x8e/0xa0 [ 30.268909] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.269551] remove_vma+0x139/0x170 [ 30.269995] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.270599] do_vmi_munmap+0x1f1/0x2b0 [ 30.271088] __vm_munmap+0x138/0x3a0 [ 30.271556] __x64_sys_munmap+0x59/0x80 [ 30.272061] do_syscall_64+0x3f/0x90 [ 30.272542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.273200] [ 30.273420] Second to last potentially related work creation: [ 30.274102] kasan_save_stack+0x22/0x50 [ 30.274608] __kasan_record_aux_stack+0x8e/0xa0 [ 30.275175] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.275817] remove_vma+0x139/0x170 [ 30.276270] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.276829] do_vmi_munmap+0x1f1/0x2b0 [ 30.277318] __vm_munmap+0x138/0x3a0 [ 30.277784] __x64_sys_munmap+0x59/0x80 [ 30.278287] do_syscall_64+0x3f/0x90 [ 30.278761] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.279412] [ 30.279629] The buggy address belongs to the object at ffff88801672c658 [ 30.279629] which belongs to the cache vm_area_struct of size 168 [ 30.281116] The buggy address is located 88 bytes inside of [ 30.281116] freed 168-byte region [ffff88801672c658, ffff88801672c700) [ 30.282529] [ 30.282743] The buggy address belongs to the physical page: [ 30.283406] page:00000000c3001d90 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1672c [ 30.284498] memcg:ffff8880147acc01 [ 30.284933] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.285582] page_type: 0xffffffff() [ 30.286039] raw: 0100000000000200 ffff8880087a0c80 ffffea00005a7440 dead000000000006 [ 30.286962] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880147acc01 [ 30.287876] page dumped because: kasan: bad access detected [ 30.288539] [ 30.288751] Memory state around the buggy address: [ 30.289355] ffff88801672c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.290219] ffff88801672c600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.291069] >ffff88801672c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.291917] ^ [ 30.292504] ffff88801672c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.293371] ffff88801672c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.294238] ================================================================== [ 30.295163] Disabling lock debugging due to kernel taint [ 32.374010] BUG: Bad rss-counter state mm:00000000f8145a2d type:MM_FILEPAGES val:33 [ 32.374552] BUG: Bad rss-counter state mm:00000000f8145a2d type:MM_ANONPAGES val:22 [ 32.788858] BUG: Bad rss-counter state mm:00000000aa233079 type:MM_FILEPAGES val:33 [ 32.790082] BUG: Bad rss-counter state mm:00000000aa233079 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31656' (ECDSA) to the list of known hosts. 2023/06/21 02:01:25 fuzzer started 2023/06/21 02:01:25 dialing manager at localhost:36067 2023/06/21 02:01:25 checking machine... 2023/06/21 02:01:25 checking revisions... [ 33.492440] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:01:25 testing simple program... [ 33.548586] cgroup: Unknown subsys name 'net' [ 33.592145] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:01:25 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=1ffff110012b58e6 RSI=ffffffff81abdf6c RDI=0000000000000005 RBP=ffff88800ffce000 RSP=ffff8880158276f0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800b46fd98 R13=0000000000000000 R14=ffff88800ffce600 R15=0000000000000000 RIP=ffffffff81abdf92 RFL=00000246 [---Z-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 00007fc86a3b3700 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=00007fff75c4ee58 CR3=00000000167a4000 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=2034323a31303a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a31303a3230203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001dce943 RBX=ffff88800ee749e8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800ee74a18 RBP=ffff8880196ead98 RSP=ffff888008e37cb8 R8 =0000000000000001 R9 =ffffed10011c6f8b R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff8880196f02f0 R14=ffffffff813782f8 R15=ffff888016bbed80 RIP=ffffffff818464e2 RFL=00000046 [---Z-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 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=00007fffc562c000 CR3=0000000016b72000 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