syzkaller login: [ 30.585511] BUG: Bad rss-counter state mm:000000003f622d11 type:MM_FILEPAGES val:33 [ 30.587266] BUG: Bad rss-counter state mm:000000003f622d11 type:MM_ANONPAGES val:22 [ 30.757191] ================================================================== [ 30.758331] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.759486] Read of size 8 at addr ffff888019e61058 by task sshd/221 [ 30.760522] [ 30.760772] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.761690] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.762660] Call Trace: [ 30.762966] [ 30.763243] dump_stack_lvl+0x91/0xf0 [ 30.763734] print_report+0xcc/0x620 [ 30.764216] ? __virt_addr_valid+0x102/0x340 [ 30.764766] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.765365] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.765968] kasan_report+0xbe/0xf0 [ 30.766436] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.767059] vma_interval_tree_remove+0xc75/0xec0 [ 30.767647] vma_prepare+0xc54/0x11a0 [ 30.768125] __split_vma+0x5af/0x950 [ 30.768601] ? __pfx___split_vma+0x10/0x10 [ 30.769127] ? find_held_lock+0x2c/0x110 [ 30.769649] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.770201] ? lock_is_held_type+0x9f/0x120 [ 30.770731] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.771330] ? mtree_range_walk+0x632/0x900 [ 30.771875] ? mas_walk+0x5c7/0x7c0 [ 30.772363] do_vmi_munmap+0x1f1/0x2b0 [ 30.772854] mmap_region+0x1f9/0x2660 [ 30.773326] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.773832] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.774532] ? __pfx_lock_acquire+0x10/0x10 [ 30.775055] ? __pfx_mmap_region+0x10/0x10 [ 30.775569] ? security_mmap_addr+0x7d/0xa0 [ 30.776086] ? get_unmapped_area+0x1f5/0x3f0 [ 30.776638] do_mmap+0x854/0xf00 [ 30.777071] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.777566] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.778118] ksys_mmap_pgoff+0x3af/0x500 [ 30.778626] do_syscall_64+0x3f/0x90 [ 30.779091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.779723] RIP: 0033:0x7fcf00c09d82 [ 30.780181] 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 [ 30.782280] RSP: 002b:00007ffeb561b938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.783176] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcf00c09d82 [ 30.783997] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcf00043000 [ 30.784854] RBP: 00007fcf00043000 R08: 0000000000000009 R09: 0000000000001000 [ 30.785677] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560082833ec0 [ 30.786504] R13: 00007ffeb561b950 R14: 00007ffeb561b980 R15: 00007ffeb561bce0 [ 30.787356] [ 30.787654] [ 30.787867] Allocated by task 213: [ 30.788292] kasan_save_stack+0x22/0x50 [ 30.788800] kasan_set_track+0x25/0x30 [ 30.789285] __kasan_slab_alloc+0x59/0x70 [ 30.789801] kmem_cache_alloc+0x16b/0x370 [ 30.790314] vm_area_dup+0x20/0x160 [ 30.790769] __split_vma+0x170/0x950 [ 30.791228] split_vma+0xc6/0x110 [ 30.791667] mprotect_fixup+0x8d2/0xb30 [ 30.792166] do_mprotect_pkey+0x87e/0xd40 [ 30.792678] __x64_sys_mprotect+0x78/0xc0 [ 30.793188] do_syscall_64+0x3f/0x90 [ 30.793648] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.794296] [ 30.794505] Freed by task 203: [ 30.794890] kasan_save_stack+0x22/0x50 [ 30.795386] kasan_set_track+0x25/0x30 [ 30.795872] kasan_save_free_info+0x2b/0x50 [ 30.796403] __kasan_slab_free+0x10a/0x190 [ 30.796937] kmem_cache_free+0x10d/0x4d0 [ 30.797444] rcu_core+0x8c8/0x2860 [ 30.797894] __do_softirq+0x1b7/0x7d4 [ 30.798362] [ 30.798571] Last potentially related work creation: [ 30.799155] kasan_save_stack+0x22/0x50 [ 30.799654] __kasan_record_aux_stack+0x8e/0xa0 [ 30.800251] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.800900] remove_vma+0x139/0x170 [ 30.801330] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.801929] do_vmi_munmap+0x1f1/0x2b0 [ 30.802402] __vm_munmap+0x138/0x3a0 [ 30.802853] __x64_sys_munmap+0x59/0x80 [ 30.803333] do_syscall_64+0x3f/0x90 [ 30.803796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.804452] [ 30.804663] Second to last potentially related work creation: [ 30.805342] kasan_save_stack+0x22/0x50 [ 30.805834] __kasan_record_aux_stack+0x8e/0xa0 [ 30.806400] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.807044] remove_vma+0x139/0x170 [ 30.807492] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.808041] do_vmi_munmap+0x1f1/0x2b0 [ 30.808523] mmap_region+0x1f9/0x2660 [ 30.808992] do_mmap+0x854/0xf00 [ 30.809421] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.809902] ksys_mmap_pgoff+0x3af/0x500 [ 30.810402] do_syscall_64+0x3f/0x90 [ 30.810870] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.811502] [ 30.811712] The buggy address belongs to the object at ffff888019e61000 [ 30.811712] which belongs to the cache vm_area_struct of size 168 [ 30.813167] The buggy address is located 88 bytes inside of [ 30.813167] freed 168-byte region [ffff888019e61000, ffff888019e610a8) [ 30.814571] [ 30.814790] The buggy address belongs to the physical page: [ 30.815451] page:000000004ab30b5e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e61 [ 30.816560] memcg:ffff888019e60201 [ 30.816986] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.817680] page_type: 0xffffffff() [ 30.818134] raw: 0100000000000200 ffff88800879fc80 ffffea000067a240 dead000000000007 [ 30.819037] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e60201 [ 30.819937] page dumped because: kasan: bad access detected [ 30.820600] [ 30.820814] Memory state around the buggy address: [ 30.821382] ffff888019e60f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.822239] ffff888019e60f80: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.823091] >ffff888019e61000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.823940] ^ [ 30.824672] ffff888019e61080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.825513] ffff888019e61100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.826364] ================================================================== [ 30.827269] Disabling lock debugging due to kernel taint [ 32.906161] BUG: Bad rss-counter state mm:00000000bbe21293 type:MM_FILEPAGES val:33 [ 32.907360] BUG: Bad rss-counter state mm:00000000bbe21293 type:MM_ANONPAGES val:22 [ 33.424266] BUG: Bad rss-counter state mm:00000000660a9880 type:MM_FILEPAGES val:33 [ 33.425429] BUG: Bad rss-counter state mm:00000000660a9880 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63001' (ECDSA) to the list of known hosts. 2023/06/20 05:23:40 fuzzer started 2023/06/20 05:23:40 dialing manager at localhost:44161 2023/06/20 05:23:40 checking machine... 2023/06/20 05:23:40 checking revisions... [ 34.038896] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:23:40 testing simple program... [ 34.089482] cgroup: Unknown subsys name 'net' [ 34.131448] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:23:39 Registers: info registers vcpu 0 RAX=ffffffff8363de4f RBX=ffffffff85fa39bc RCX=ffffffff8363de42 RDX=0000000000000000 RSI=ffffffff863b1c96 RDI=ffffffff85fa39b0 RBP=ffffffff85fa39b0 RSP=ffff8880140cf750 R8 =ffffffff863b1c96 R9 =ffff8880140cf848 R10=0000000000038001 R11=000000000008a977 R12=ffffffff85fa39b8 R13=ffffffff85fa39b0 R14=ffffffff85fa39b0 R15=dffffc0000000000 RIP=ffffffff8112fca2 RFL=00000202 [-------] 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 00007fc4ae643900 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=00007fc4aebf8650 CR3=000000001beb8000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000011 RBX=0000000000000002 RCX=ffffffff8180c584 RDX=0000000000000011 RSI=ffffffff86137508 RDI=ffffffff85dfc9fc RBP=ffff88806cf09af0 RSP=ffff88806cf099f0 R8 =ffffffff86137508 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffffffff85dfca3c R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff8112fc21 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f438d0d1900 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=00007f438c53e8b0 CR3=000000000f120000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=2200b5205b3caabf00000000000ae988 XMM05=a3c993e94d008d190000000000136a88 XMM06=19e9129bd510f2350000000000135920 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000