syzkaller login: [ 30.809669] BUG: Bad rss-counter state mm:00000000faad224d type:MM_FILEPAGES val:33 [ 30.810849] BUG: Bad rss-counter state mm:00000000faad224d type:MM_ANONPAGES val:22 [ 30.858568] ================================================================== [ 30.859494] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.860444] Read of size 8 at addr ffff888009971df0 by task sshd/218 [ 30.861232] [ 30.861455] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.862365] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.863351] Call Trace: [ 30.863674] [ 30.863958] dump_stack_lvl+0x91/0xf0 [ 30.864456] print_report+0xcc/0x620 [ 30.864942] ? __virt_addr_valid+0x102/0x340 [ 30.865505] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.866162] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.866786] kasan_report+0xbe/0xf0 [ 30.867270] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.867895] vma_interval_tree_remove+0xc75/0xec0 [ 30.868513] vma_prepare+0xc54/0x11a0 [ 30.868994] __split_vma+0x5af/0x950 [ 30.869461] ? __pfx___split_vma+0x10/0x10 [ 30.869984] ? find_held_lock+0x2c/0x110 [ 30.870520] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.871076] ? lock_is_held_type+0x9f/0x120 [ 30.871608] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.872206] ? mtree_range_walk+0x632/0x900 [ 30.872752] ? mas_walk+0x5c7/0x7c0 [ 30.873221] do_vmi_munmap+0x1f1/0x2b0 [ 30.873710] mmap_region+0x1f9/0x2660 [ 30.874205] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.874714] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.875421] ? __pfx_lock_acquire+0x10/0x10 [ 30.875953] ? __pfx_mmap_region+0x10/0x10 [ 30.876479] ? security_mmap_addr+0x7d/0xa0 [ 30.877013] ? get_unmapped_area+0x1f5/0x3f0 [ 30.877560] do_mmap+0x854/0xf00 [ 30.877998] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.878515] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.879083] ksys_mmap_pgoff+0x3af/0x500 [ 30.879594] do_syscall_64+0x3f/0x90 [ 30.880075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.880723] RIP: 0033:0x7f6eddb26d82 [ 30.881181] 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 [ 30.883332] RSP: 002b:00007fff101b6828 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.884228] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6eddb26d82 [ 30.885082] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6edcf60000 [ 30.885926] RBP: 00007f6edcf60000 R08: 0000000000000009 R09: 0000000000001000 [ 30.886921] R10: 0000000000000812 R11: 0000000000000206 R12: 00005631c5c3cf70 [ 30.887773] R13: 00007fff101b6840 R14: 00007fff101b6870 R15: 00007fff101b6bd0 [ 30.888641] [ 30.888936] [ 30.889149] Allocated by task 211: [ 30.889578] kasan_save_stack+0x22/0x50 [ 30.890100] kasan_set_track+0x25/0x30 [ 30.890603] __kasan_slab_alloc+0x59/0x70 [ 30.891130] kmem_cache_alloc+0x16b/0x370 [ 30.891645] vm_area_dup+0x20/0x160 [ 30.892106] __split_vma+0x170/0x950 [ 30.892568] split_vma+0xc6/0x110 [ 30.893017] mprotect_fixup+0x8d2/0xb30 [ 30.893536] do_mprotect_pkey+0x87e/0xd40 [ 30.894067] __x64_sys_mprotect+0x78/0xc0 [ 30.894633] do_syscall_64+0x3f/0x90 [ 30.895111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.895774] [ 30.895992] Freed by task 211: [ 30.896383] kasan_save_stack+0x22/0x50 [ 30.896871] kasan_set_track+0x25/0x30 [ 30.897339] kasan_save_free_info+0x2b/0x50 [ 30.897847] __kasan_slab_free+0x10a/0x190 [ 30.898361] kmem_cache_free+0x10d/0x4d0 [ 30.898845] rcu_core+0x8c8/0x2860 [ 30.899265] __do_softirq+0x1b7/0x7d4 [ 30.899720] [ 30.899926] Last potentially related work creation: [ 30.900483] kasan_save_stack+0x22/0x50 [ 30.900959] __kasan_record_aux_stack+0x8e/0xa0 [ 30.901504] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.902137] remove_vma+0x139/0x170 [ 30.902570] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.903130] do_vmi_munmap+0x1f1/0x2b0 [ 30.903623] __vm_munmap+0x138/0x3a0 [ 30.904089] __x64_sys_munmap+0x59/0x80 [ 30.904584] do_syscall_64+0x3f/0x90 [ 30.905053] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.905700] [ 30.905916] The buggy address belongs to the object at ffff888009971d98 [ 30.905916] which belongs to the cache vm_area_struct of size 168 [ 30.907420] The buggy address is located 88 bytes inside of [ 30.907420] freed 168-byte region [ffff888009971d98, ffff888009971e40) [ 30.908835] [ 30.909054] The buggy address belongs to the physical page: [ 30.909717] page:0000000030fbee91 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9971 [ 30.910845] memcg:ffff88800dcd8201 [ 30.911275] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.911926] page_type: 0xffffffff() [ 30.912380] raw: 0100000000000200 ffff8880087a0c80 ffffea000039b900 dead000000000004 [ 30.913292] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcd8201 [ 30.914232] page dumped because: kasan: bad access detected [ 30.914899] [ 30.915112] Memory state around the buggy address: [ 30.915695] ffff888009971c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.916557] ffff888009971d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.917423] >ffff888009971d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.918293] ^ [ 30.919106] ffff888009971e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.919972] ffff888009971e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.920833] ================================================================== [ 30.922123] Disabling lock debugging due to kernel taint [ 32.931793] BUG: Bad rss-counter state mm:00000000bed86dd0 type:MM_FILEPAGES val:33 [ 32.932738] BUG: Bad rss-counter state mm:00000000bed86dd0 type:MM_ANONPAGES val:22 [ 33.476227] BUG: Bad rss-counter state mm:00000000f8ba4d54 type:MM_FILEPAGES val:33 [ 33.477303] BUG: Bad rss-counter state mm:00000000f8ba4d54 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46271' (ECDSA) to the list of known hosts. 2023/06/20 11:00:21 fuzzer started 2023/06/20 11:00:21 dialing manager at localhost:36067 2023/06/20 11:00:21 checking machine... 2023/06/20 11:00:21 checking revisions... [ 34.210236] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:00:21 testing simple program... [ 34.263561] cgroup: Unknown subsys name 'net' [ 34.321378] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:00:21 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff861386ee RDX=1ffff11001e81e45 RSI=1ffff11001e81e44 RDI=1ffff11001e81e44 RBP=ffff88800f40f220 RSP=ffff88800f40f158 R8 =ffffffff861386f2 R9 =ffff88800f40f208 R10=0000000000038001 R11=0000000000020c51 R12=ffff88800f40f228 R13=ffff88800f40f210 R14=ffff88800f40f5a8 R15=ffff88800f40f1c8 RIP=ffffffff811310ce 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 0000000000000000 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=000055d4c0241000 CR3=000000000efe8000 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=00000000000000000000000000777074 XMM04=00007fd2f68abc71000000725f646975 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=000000000000726f7475636578652d7a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888017d23e00 RCX=0000000000000000 RDX=ffff888017c53680 RSI=ffffffff844a50ad RDI=0000000000000005 RBP=0000000000000002 RSP=ffff88801cd97cc0 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000003 R11=0000000000000000 R12=0000000000000000 R13=ffff88800fece600 R14=0000000000000000 R15=00007fd2cd9edfff RIP=ffffffff814c089b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd2cd9b9900 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=00007fd2cd97e008 CR3=0000000009878000 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