syzkaller login: [ 80.816199] BUG: Bad rss-counter state mm:00000000c4f4f6ee type:MM_FILEPAGES val:33 [ 80.817489] BUG: Bad rss-counter state mm:00000000c4f4f6ee type:MM_ANONPAGES val:22 [ 80.856350] ================================================================== [ 80.857300] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 80.858238] Read of size 8 at addr ffff88800c435140 by task sshd/220 [ 80.859090] [ 80.859326] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 80.860365] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 80.861352] Call Trace: [ 80.861669] [ 80.861978] dump_stack_lvl+0x91/0xf0 [ 80.862472] print_report+0xcc/0x620 [ 80.862968] ? __virt_addr_valid+0x102/0x340 [ 80.863550] ? vma_interval_tree_remove+0xc75/0xec0 [ 80.864170] ? vma_interval_tree_remove+0xc75/0xec0 [ 80.864801] kasan_report+0xbe/0xf0 [ 80.865285] ? vma_interval_tree_remove+0xc75/0xec0 [ 80.865939] vma_interval_tree_remove+0xc75/0xec0 [ 80.866567] vma_prepare+0xc54/0x11a0 [ 80.867064] __split_vma+0x5af/0x950 [ 80.867575] ? __pfx___split_vma+0x10/0x10 [ 80.868122] ? find_held_lock+0x2c/0x110 [ 80.868669] do_vmi_align_munmap+0x2ba/0x11f0 [ 80.869267] ? lock_is_held_type+0x9f/0x120 [ 80.869829] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 80.870465] ? mtree_range_walk+0x632/0x900 [ 80.871036] ? mas_walk+0x5c7/0x7c0 [ 80.871536] do_vmi_munmap+0x1f1/0x2b0 [ 80.872059] mmap_region+0x1f9/0x2660 [ 80.872551] ? vm_mmap_pgoff+0x15c/0x3a0 [ 80.873094] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 80.873853] ? __pfx_lock_acquire+0x10/0x10 [ 80.874417] ? __pfx_mmap_region+0x10/0x10 [ 80.874954] ? security_mmap_addr+0x7d/0xa0 [ 80.875515] ? get_unmapped_area+0x1f5/0x3f0 [ 80.876070] do_mmap+0x854/0xf00 [ 80.876534] vm_mmap_pgoff+0x1a6/0x3a0 [ 80.877050] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 80.877640] ksys_mmap_pgoff+0x3af/0x500 [ 80.878173] do_syscall_64+0x3f/0x90 [ 80.878674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 80.879365] RIP: 0033:0x7ffbfde2cd82 [ 80.879853] 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 [ 80.882113] RSP: 002b:00007ffda9ea27d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 80.883048] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffbfde2cd82 [ 80.883942] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffbfd266000 [ 80.884805] RBP: 00007ffbfd266000 R08: 0000000000000009 R09: 0000000000001000 [ 80.885658] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e8b95bb20 [ 80.886544] R13: 00007ffda9ea27f0 R14: 00007ffda9ea2820 R15: 00007ffda9ea2b80 [ 80.887480] [ 80.887792] [ 80.888018] Allocated by task 213: [ 80.888475] kasan_save_stack+0x22/0x50 [ 80.889004] kasan_set_track+0x25/0x30 [ 80.889527] __kasan_slab_alloc+0x59/0x70 [ 80.890094] kmem_cache_alloc+0x16b/0x370 [ 80.890645] vm_area_dup+0x20/0x160 [ 80.891122] __split_vma+0x170/0x950 [ 80.891623] split_vma+0xc6/0x110 [ 80.892085] mprotect_fixup+0x8d2/0xb30 [ 80.892624] do_mprotect_pkey+0x87e/0xd40 [ 80.893184] __x64_sys_mprotect+0x78/0xc0 [ 80.893738] do_syscall_64+0x3f/0x90 [ 80.894247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 80.894936] [ 80.895163] Freed by task 213: [ 80.895586] kasan_save_stack+0x22/0x50 [ 80.896118] kasan_set_track+0x25/0x30 [ 80.896643] kasan_save_free_info+0x2b/0x50 [ 80.897207] __kasan_slab_free+0x10a/0x190 [ 80.897775] kmem_cache_free+0x10d/0x4d0 [ 80.898311] rcu_core+0x8c8/0x2860 [ 80.898790] __do_softirq+0x1b7/0x7d4 [ 80.899290] [ 80.899541] Last potentially related work creation: [ 80.900169] kasan_save_stack+0x22/0x50 [ 80.900697] __kasan_record_aux_stack+0x8e/0xa0 [ 80.901302] __call_rcu_common.constprop.0+0x6a/0xb90 [ 80.901981] remove_vma+0x139/0x170 [ 80.902456] do_vmi_align_munmap+0xd4a/0x11f0 [ 80.903046] do_vmi_munmap+0x1f1/0x2b0 [ 80.903569] __vm_munmap+0x138/0x3a0 [ 80.904061] __x64_sys_munmap+0x59/0x80 [ 80.904581] do_syscall_64+0x3f/0x90 [ 80.905076] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 80.905755] [ 80.905984] The buggy address belongs to the object at ffff88800c4350e8 [ 80.905984] which belongs to the cache vm_area_struct of size 168 [ 80.907577] The buggy address is located 88 bytes inside of [ 80.907577] freed 168-byte region [ffff88800c4350e8, ffff88800c435190) [ 80.909089] [ 80.909317] The buggy address belongs to the physical page: [ 80.910020] page:0000000009359db6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc435 [ 80.911163] memcg:ffff88800e7c6701 [ 80.911624] flags: 0x100000000000200(slab|node=0|zone=1) [ 80.912298] page_type: 0xffffffff() [ 80.912758] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 80.913684] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7c6701 [ 80.914598] page dumped because: kasan: bad access detected [ 80.915267] [ 80.915492] Memory state around the buggy address: [ 80.916080] ffff88800c435000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 80.916954] ffff88800c435080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 80.917865] >ffff88800c435100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 80.918765] ^ [ 80.919444] ffff88800c435180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 80.920321] ffff88800c435200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 80.921183] ================================================================== [ 80.922230] Disabling lock debugging due to kernel taint [ 82.909213] BUG: Bad rss-counter state mm:000000000331e452 type:MM_FILEPAGES val:33 [ 82.910587] BUG: Bad rss-counter state mm:000000000331e452 type:MM_ANONPAGES val:22 [ 83.359076] BUG: Bad rss-counter state mm:000000002f3a3548 type:MM_FILEPAGES val:33 [ 83.360187] BUG: Bad rss-counter state mm:000000002f3a3548 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11062' (ECDSA) to the list of known hosts. 2023/06/19 13:42:52 fuzzer started 2023/06/19 13:42:53 dialing manager at localhost:44161 2023/06/19 13:42:53 checking machine... 2023/06/19 13:42:53 checking revisions... [ 84.083510] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:42:53 testing simple program... [ 84.126540] cgroup: Unknown subsys name 'net' [ 84.176175] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:42:02 Registers: info registers vcpu 0 RAX=ffffffff8180c590 RBX=ffffffff85dfca2c RCX=ffffffff8180c584 RDX=0000000000000000 RSI=ffffffff86137508 RDI=ffffffff85dfc9fc RBP=ffffffff85dfca20 RSP=ffff88800de37880 R8 =ffffffff86137508 R9 =ffff88800de37978 R10=0000000000038001 R11=0000000000020d8a R12=ffffffff85dfca3c R13=ffffffff85dfc9fc R14=ffffffff85dfca1c R15=dffffc0000000000 RIP=ffffffff8112fc99 RFL=00000283 [--S---C] 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 00007fb6c3769900 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=00007fff347ab000 CR3=000000000cca6000 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=2032353a32343a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a32343a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f96a9406d60 CR3=0000000013e6e000 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=32343a3331203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343339 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000