syzkaller login: [ 31.188716] BUG: Bad rss-counter state mm:0000000003a2812a type:MM_FILEPAGES val:33 [ 31.190016] BUG: Bad rss-counter state mm:0000000003a2812a type:MM_ANONPAGES val:22 [ 31.397248] ================================================================== [ 31.398172] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.399093] Read of size 8 at addr ffff888019d354e0 by task sshd/222 [ 31.400012] [ 31.400271] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.401351] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.402496] Call Trace: [ 31.402804] <TASK> [ 31.403072] dump_stack_lvl+0x91/0xf0 [ 31.403534] print_report+0xcc/0x620 [ 31.403994] ? __virt_addr_valid+0x102/0x340 [ 31.404507] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.405082] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.405669] kasan_report+0xbe/0xf0 [ 31.406137] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.406739] vma_interval_tree_remove+0xc75/0xec0 [ 31.407317] vma_prepare+0xc54/0x11a0 [ 31.407770] __split_vma+0x5af/0x950 [ 31.408228] ? __pfx___split_vma+0x10/0x10 [ 31.408731] ? find_held_lock+0x2c/0x110 [ 31.409229] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.409814] ? lock_is_held_type+0x9f/0x120 [ 31.410329] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.410905] ? mtree_range_walk+0x632/0x900 [ 31.411438] ? mas_walk+0x5c7/0x7c0 [ 31.411890] do_vmi_munmap+0x1f1/0x2b0 [ 31.412359] mmap_region+0x1f9/0x2660 [ 31.412815] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.413302] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.414004] ? __pfx_lock_acquire+0x10/0x10 [ 31.414511] ? __pfx_mmap_region+0x10/0x10 [ 31.415030] ? security_mmap_addr+0x7d/0xa0 [ 31.415541] ? get_unmapped_area+0x1f5/0x3f0 [ 31.416070] do_mmap+0x854/0xf00 [ 31.416494] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.416964] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.417496] ksys_mmap_pgoff+0x3af/0x500 [ 31.417998] do_syscall_64+0x3f/0x90 [ 31.418461] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.419079] RIP: 0033:0x7f1eeeea9d82 [ 31.419513] 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 [ 31.421541] RSP: 002b:00007ffd97eef4e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.422426] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1eeeea9d82 [ 31.423230] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1eee2e3000 [ 31.424037] RBP: 00007f1eee2e3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.424837] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559d7b05d980 [ 31.425745] R13: 00007ffd97eef500 R14: 00007ffd97eef530 R15: 00007ffd97eef890 [ 31.426628] </TASK> [ 31.426961] [ 31.427210] Allocated by task 215: [ 31.427745] kasan_save_stack+0x22/0x50 [ 31.428361] kasan_set_track+0x25/0x30 [ 31.428964] __kasan_slab_alloc+0x59/0x70 [ 31.429635] kmem_cache_alloc+0x16b/0x370 [ 31.430283] vm_area_dup+0x20/0x160 [ 31.430848] __split_vma+0x170/0x950 [ 31.431420] split_vma+0xc6/0x110 [ 31.431960] mprotect_fixup+0x8d2/0xb30 [ 31.432585] do_mprotect_pkey+0x87e/0xd40 [ 31.433225] __x64_sys_mprotect+0x78/0xc0 [ 31.433871] do_syscall_64+0x3f/0x90 [ 31.434448] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.435249] [ 31.435511] Freed by task 215: [ 31.435992] kasan_save_stack+0x22/0x50 [ 31.436607] kasan_set_track+0x25/0x30 [ 31.437217] kasan_save_free_info+0x2b/0x50 [ 31.437865] __kasan_slab_free+0x10a/0x190 [ 31.438512] kmem_cache_free+0x10d/0x4d0 [ 31.439124] rcu_core+0x8c8/0x2860 [ 31.439660] __do_softirq+0x1b7/0x7d4 [ 31.440242] [ 31.440497] Last potentially related work creation: [ 31.441224] kasan_save_stack+0x22/0x50 [ 31.441854] __kasan_record_aux_stack+0x8e/0xa0 [ 31.442551] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.443349] remove_vma+0x139/0x170 [ 31.443899] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.444579] do_vmi_munmap+0x1f1/0x2b0 [ 31.445172] __vm_munmap+0x138/0x3a0 [ 31.445747] __x64_sys_munmap+0x59/0x80 [ 31.446359] do_syscall_64+0x3f/0x90 [ 31.446937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.447738] [ 31.448008] Second to last potentially related work creation: [ 31.448863] kasan_save_stack+0x22/0x50 [ 31.449479] __kasan_record_aux_stack+0x8e/0xa0 [ 31.450188] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.450978] remove_vma+0x139/0x170 [ 31.451540] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.452224] do_vmi_munmap+0x1f1/0x2b0 [ 31.452822] mmap_region+0x1f9/0x2660 [ 31.453401] do_mmap+0x854/0xf00 [ 31.453948] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.454550] ksys_mmap_pgoff+0x3af/0x500 [ 31.455174] do_syscall_64+0x3f/0x90 [ 31.455753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.456531] [ 31.456789] The buggy address belongs to the object at ffff888019d35488 [ 31.456789] which belongs to the cache vm_area_struct of size 168 [ 31.458635] The buggy address is located 88 bytes inside of [ 31.458635] freed 168-byte region [ffff888019d35488, ffff888019d35530) [ 31.460396] [ 31.460662] The buggy address belongs to the physical page: [ 31.461475] page:00000000285853dd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d35 [ 31.462634] memcg:ffff88801597bd01 [ 31.463077] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.463777] page_type: 0xffffffff() [ 31.464265] raw: 0100000000000200 ffff8880087a0c80 ffffea000067a040 0000000000000005 [ 31.465206] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801597bd01 [ 31.466167] page dumped because: kasan: bad access detected [ 31.466843] [ 31.467059] Memory state around the buggy address: [ 31.467646] ffff888019d35380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.468536] ffff888019d35400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.469417] >ffff888019d35480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.470309] ^ [ 31.471094] ffff888019d35500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.471985] ffff888019d35580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.472863] ================================================================== [ 31.473900] Disabling lock debugging due to kernel taint [ 33.281542] BUG: Bad rss-counter state mm:000000005ab35113 type:MM_FILEPAGES val:33 [ 33.282251] BUG: Bad rss-counter state mm:000000005ab35113 type:MM_ANONPAGES val:22 [ 33.699475] BUG: Bad rss-counter state mm:00000000aae9a6bf type:MM_FILEPAGES val:33 [ 33.700243] BUG: Bad rss-counter state mm:00000000aae9a6bf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64182' (ECDSA) to the list of known hosts. 2023/06/20 12:27:25 fuzzer started 2023/06/20 12:27:25 dialing manager at localhost:36067 2023/06/20 12:27:25 checking machine... 2023/06/20 12:27:25 checking revisions... [ 34.392761] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:27:25 testing simple program... [ 34.444339] cgroup: Unknown subsys name 'net' [ 34.491181] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:27:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800fefb680 RSI=ffffffff8170de22 RDI=0000000000000001 RBP=00007f390df6b000 RSP=ffff88800f167978 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff88800f167ca8 R15=ffff88800f1679d0 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f390dfaa900 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=00007f390df6a008 CR3=000000000eada000 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=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 info registers vcpu 1 RAX=ffff88800ec70d90 RBX=ffff88806cf09ee8 RCX=1ffff11001d8e1b2 RDX=ffff888019100418 RSI=0000000000000008 RDI=ffff88806cf09ef8 RBP=000000000000004d RSP=ffff88806cf09e50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88806cf09ee8 R14=ffff888008d951c0 R15=ffff888009455080 RIP=ffffffff8137fcd9 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 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=00007fe1b257b000 CR3=000000000eb1c000 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=2035323a37323a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a37323a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000