syzkaller login: [ 75.350894] BUG: Bad rss-counter state mm:000000002c34d543 type:MM_FILEPAGES val:33 [ 75.351960] BUG: Bad rss-counter state mm:000000002c34d543 type:MM_ANONPAGES val:22 [ 75.390486] ================================================================== [ 75.391478] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 75.392520] Read of size 8 at addr ffff888016ced3f8 by task sshd/221 [ 75.393395] [ 75.393615] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 75.394723] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 75.395819] Call Trace: [ 75.396153] [ 75.396482] dump_stack_lvl+0x91/0xf0 [ 75.397029] print_report+0xcc/0x620 [ 75.397557] ? __virt_addr_valid+0x102/0x340 [ 75.398188] ? vma_interval_tree_remove+0xc75/0xec0 [ 75.398885] ? vma_interval_tree_remove+0xc75/0xec0 [ 75.399581] kasan_report+0xbe/0xf0 [ 75.400210] ? vma_interval_tree_remove+0xc75/0xec0 [ 75.401048] vma_interval_tree_remove+0xc75/0xec0 [ 75.401835] vma_prepare+0xc54/0x11a0 [ 75.402465] __split_vma+0x5af/0x950 [ 75.403136] ? __pfx___split_vma+0x10/0x10 [ 75.403793] ? lockdep_hardirqs_on_prepare+0x27b/0x3f0 [ 75.404668] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 75.405504] do_vmi_align_munmap+0x2ba/0x11f0 [ 75.406228] ? lock_is_held_type+0x9f/0x120 [ 75.406769] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 75.407367] ? mtree_range_walk+0x632/0x900 [ 75.407926] ? mas_walk+0x5c7/0x7c0 [ 75.408401] do_vmi_munmap+0x1f1/0x2b0 [ 75.408891] mmap_region+0x1f9/0x2660 [ 75.409370] ? vm_mmap_pgoff+0x15c/0x3a0 [ 75.409890] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 75.410598] ? __pfx_lock_acquire+0x10/0x10 [ 75.411136] ? __pfx_mmap_region+0x10/0x10 [ 75.411669] ? security_mmap_addr+0x7d/0xa0 [ 75.412200] ? get_unmapped_area+0x1f5/0x3f0 [ 75.412755] do_mmap+0x854/0xf00 [ 75.413197] vm_mmap_pgoff+0x1a6/0x3a0 [ 75.413712] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 75.414267] ksys_mmap_pgoff+0x3af/0x500 [ 75.414773] do_syscall_64+0x3f/0x90 [ 75.415254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 75.415897] RIP: 0033:0x7f7dafd7ed82 [ 75.416362] 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 [ 75.418506] RSP: 002b:00007ffdf2b8c318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 75.419400] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7dafd7ed82 [ 75.420254] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7daf1b8000 [ 75.421096] RBP: 00007f7daf1b8000 R08: 0000000000000009 R09: 0000000000001000 [ 75.421943] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556716d28ec0 [ 75.422781] R13: 00007ffdf2b8c330 R14: 00007ffdf2b8c360 R15: 00007ffdf2b8c6c0 [ 75.423632] [ 75.423919] [ 75.424137] Allocated by task 214: [ 75.424567] kasan_save_stack+0x22/0x50 [ 75.425079] kasan_set_track+0x25/0x30 [ 75.425583] __kasan_slab_alloc+0x59/0x70 [ 75.426164] kmem_cache_alloc+0x16b/0x370 [ 75.426681] vm_area_dup+0x20/0x160 [ 75.427139] __split_vma+0x170/0x950 [ 75.427611] split_vma+0xc6/0x110 [ 75.428055] mprotect_fixup+0x8d2/0xb30 [ 75.428554] do_mprotect_pkey+0x87e/0xd40 [ 75.429081] __x64_sys_mprotect+0x78/0xc0 [ 75.429598] do_syscall_64+0x3f/0x90 [ 75.430083] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 75.430722] [ 75.430934] Freed by task 214: [ 75.431333] kasan_save_stack+0x22/0x50 [ 75.431834] kasan_set_track+0x25/0x30 [ 75.432335] kasan_save_free_info+0x2b/0x50 [ 75.432869] __kasan_slab_free+0x10a/0x190 [ 75.433400] kmem_cache_free+0x10d/0x4d0 [ 75.433916] rcu_core+0x8c8/0x2860 [ 75.434359] __do_softirq+0x1b7/0x7d4 [ 75.434829] [ 75.435050] Last potentially related work creation: [ 75.435644] kasan_save_stack+0x22/0x50 [ 75.436145] __kasan_record_aux_stack+0x8e/0xa0 [ 75.436718] __call_rcu_common.constprop.0+0x6a/0xb90 [ 75.437351] remove_vma+0x139/0x170 [ 75.437818] do_vmi_align_munmap+0xd4a/0x11f0 [ 75.438376] do_vmi_munmap+0x1f1/0x2b0 [ 75.438867] __vm_munmap+0x138/0x3a0 [ 75.439339] __x64_sys_munmap+0x59/0x80 [ 75.439833] do_syscall_64+0x3f/0x90 [ 75.440310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 75.440952] [ 75.441164] The buggy address belongs to the object at ffff888016ced3a0 [ 75.441164] which belongs to the cache vm_area_struct of size 168 [ 75.442638] The buggy address is located 88 bytes inside of [ 75.442638] freed 168-byte region [ffff888016ced3a0, ffff888016ced448) [ 75.444107] [ 75.444325] The buggy address belongs to the physical page: [ 75.444993] page:0000000021354b2e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ced [ 75.446095] memcg:ffff888016b92301 [ 75.446530] flags: 0x100000000000200(slab|node=0|zone=1) [ 75.447176] page_type: 0xffffffff() [ 75.447621] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 75.448552] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b92301 [ 75.449455] page dumped because: kasan: bad access detected [ 75.450151] [ 75.450368] Memory state around the buggy address: [ 75.450945] ffff888016ced280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 75.451811] ffff888016ced300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 75.452873] >ffff888016ced380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 75.453794] ^ [ 75.454646] ffff888016ced400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 75.455506] ffff888016ced480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 75.456359] ================================================================== [ 75.457409] Disabling lock debugging due to kernel taint [ 77.321535] BUG: Bad rss-counter state mm:000000003be53ad6 type:MM_FILEPAGES val:33 [ 77.322971] BUG: Bad rss-counter state mm:000000003be53ad6 type:MM_ANONPAGES val:22 [ 77.801708] BUG: Bad rss-counter state mm:00000000ac33f9a4 type:MM_FILEPAGES val:33 [ 77.802761] BUG: Bad rss-counter state mm:00000000ac33f9a4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22438' (ECDSA) to the list of known hosts. 2023/06/20 05:56:07 fuzzer started 2023/06/20 05:56:07 dialing manager at localhost:44161 2023/06/20 05:56:07 checking machine... 2023/06/20 05:56:07 checking revisions... [ 78.548091] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:56:07 testing simple program... [ 78.592176] cgroup: Unknown subsys name 'net' [ 78.637295] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:55:22 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f6b7ea8f5e0 CR3=000000000d61c000 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=ec29e6cf8e1f6483ec4969131d830de6 XMM02=2c67c8bc2e329bc30000000000121828 XMM03=fb795ef6d657705600000000001290f8 XMM04=5dca22bdadd8f40600000000000ae988 XMM05=88653c057b2f9c1f0000000000139f30 XMM06=c291bd5c70af25b90000000000139358 XMM07=e042d86d42eb936e0000000000129378 XMM08=07b12e46965335c20000000000121888 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8186c1c5 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100394af48 RSI=ffffffff8186c1c5 RDI=ffff88801ca57ab0 RBP=ffff88801ca57a80 RSP=ffff88801ca579e0 R8 =0000000000000001 R9 =ffff88801ca57a28 R10=0000000000038001 R11=0000000000038dbb R12=ffff88801ca57ab0 R13=0000000000000000 R14=ffff888015d91b40 R15=ffff88800e05f300 RIP=ffffffff813ad424 RFL=00000286 [--S--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 00007fcdae5ef900 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=00007ffdd486c000 CR3=000000000f6b4000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000