syzkaller login: [ 31.684121] BUG: Bad rss-counter state mm:00000000d53db11f type:MM_FILEPAGES val:33 [ 31.685618] BUG: Bad rss-counter state mm:00000000d53db11f type:MM_ANONPAGES val:22 [ 31.851566] ================================================================== [ 31.852631] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.853777] Read of size 8 at addr ffff88800e72c058 by task sshd/220 [ 31.854716] [ 31.854942] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.855805] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.856789] Call Trace: [ 31.857113] [ 31.857412] dump_stack_lvl+0x91/0xf0 [ 31.857902] print_report+0xcc/0x620 [ 31.858383] ? __virt_addr_valid+0x102/0x340 [ 31.858942] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.859568] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.860186] kasan_report+0xbe/0xf0 [ 31.860658] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.861276] vma_interval_tree_remove+0xc75/0xec0 [ 31.861873] vma_prepare+0xc54/0x11a0 [ 31.862350] __split_vma+0x5af/0x950 [ 31.862821] ? __pfx___split_vma+0x10/0x10 [ 31.863346] ? find_held_lock+0x2c/0x110 [ 31.863866] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.864430] ? lock_is_held_type+0x9f/0x120 [ 31.864969] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.865598] ? mtree_range_walk+0x632/0x900 [ 31.866152] ? mas_walk+0x5c7/0x7c0 [ 31.866630] do_vmi_munmap+0x1f1/0x2b0 [ 31.867126] mmap_region+0x1f9/0x2660 [ 31.867607] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.868121] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.868831] ? __pfx_lock_acquire+0x10/0x10 [ 31.869376] ? __pfx_mmap_region+0x10/0x10 [ 31.869907] ? security_mmap_addr+0x7d/0xa0 [ 31.870439] ? get_unmapped_area+0x1f5/0x3f0 [ 31.870990] do_mmap+0x854/0xf00 [ 31.871429] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.871926] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.872489] ksys_mmap_pgoff+0x3af/0x500 [ 31.872996] do_syscall_64+0x3f/0x90 [ 31.873485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.874136] RIP: 0033:0x7fe1c7ec4d82 [ 31.874596] 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 [ 31.876708] RSP: 002b:00007ffd2310d8b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.877640] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe1c7ec4d82 [ 31.878484] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe1c72fe000 [ 31.879325] RBP: 00007fe1c72fe000 R08: 0000000000000009 R09: 0000000000001000 [ 31.880163] R10: 0000000000000812 R11: 0000000000000206 R12: 00005580f5b19980 [ 31.881009] R13: 00007ffd2310d8d0 R14: 00007ffd2310d900 R15: 00007ffd2310dc60 [ 31.881864] [ 31.882157] [ 31.882372] Allocated by task 213: [ 31.882802] kasan_save_stack+0x22/0x50 [ 31.883305] kasan_set_track+0x25/0x30 [ 31.883797] __kasan_slab_alloc+0x59/0x70 [ 31.884316] kmem_cache_alloc+0x16b/0x370 [ 31.884833] vm_area_dup+0x20/0x160 [ 31.885305] __split_vma+0x170/0x950 [ 31.885774] split_vma+0xc6/0x110 [ 31.886206] mprotect_fixup+0x8d2/0xb30 [ 31.886706] do_mprotect_pkey+0x87e/0xd40 [ 31.887228] __x64_sys_mprotect+0x78/0xc0 [ 31.887751] do_syscall_64+0x3f/0x90 [ 31.888224] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.888863] [ 31.889079] Freed by task 213: [ 31.889479] kasan_save_stack+0x22/0x50 [ 31.889977] kasan_set_track+0x25/0x30 [ 31.890467] kasan_save_free_info+0x2b/0x50 [ 31.890997] __kasan_slab_free+0x10a/0x190 [ 31.891526] kmem_cache_free+0x10d/0x4d0 [ 31.892033] rcu_core+0x8c8/0x2860 [ 31.892478] __do_softirq+0x1b7/0x7d4 [ 31.892952] [ 31.893181] Last potentially related work creation: [ 31.893760] kasan_save_stack+0x22/0x50 [ 31.894258] __kasan_record_aux_stack+0x8e/0xa0 [ 31.894833] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.895526] remove_vma+0x139/0x170 [ 31.895979] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.896537] do_vmi_munmap+0x1f1/0x2b0 [ 31.897026] __vm_munmap+0x138/0x3a0 [ 31.897495] __x64_sys_munmap+0x59/0x80 [ 31.897992] do_syscall_64+0x3f/0x90 [ 31.898469] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.899113] [ 31.899328] The buggy address belongs to the object at ffff88800e72c000 [ 31.899328] which belongs to the cache vm_area_struct of size 168 [ 31.900818] The buggy address is located 88 bytes inside of [ 31.900818] freed 168-byte region [ffff88800e72c000, ffff88800e72c0a8) [ 31.902238] [ 31.902455] The buggy address belongs to the physical page: [ 31.903110] page:00000000484d3763 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe72c [ 31.904187] memcg:ffff88800eaeb801 [ 31.904611] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.905317] page_type: 0xffffffff() [ 31.905766] raw: 0100000000000200 ffff88800879fc80 ffffea0000395100 dead000000000007 [ 31.906675] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eaeb801 [ 31.907581] page dumped because: kasan: bad access detected [ 31.908239] [ 31.908452] Memory state around the buggy address: [ 31.909031] ffff88800e72bf00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.909894] ffff88800e72bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.910747] >ffff88800e72c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.911599] ^ [ 31.912327] ffff88800e72c080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.913210] ffff88800e72c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.914077] ================================================================== [ 31.915005] Disabling lock debugging due to kernel taint [ 33.856018] BUG: Bad rss-counter state mm:0000000056296eb9 type:MM_FILEPAGES val:33 [ 33.857034] BUG: Bad rss-counter state mm:0000000056296eb9 type:MM_ANONPAGES val:22 [ 34.375847] BUG: Bad rss-counter state mm:0000000001328e72 type:MM_FILEPAGES val:33 [ 34.377098] BUG: Bad rss-counter state mm:0000000001328e72 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60694' (ECDSA) to the list of known hosts. 2023/06/19 14:45:33 fuzzer started 2023/06/19 14:45:33 dialing manager at localhost:44161 2023/06/19 14:45:33 checking machine... 2023/06/19 14:45:33 checking revisions... [ 35.105076] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:45:33 testing simple program... [ 35.152740] cgroup: Unknown subsys name 'net' [ 35.230154] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:45:32 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff8609fb04 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff8609fb08 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ff8 R15=ffff88806ce09a98 RIP=ffffffff81131166 RFL=00000297 [--S-APC] 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 00007f30265d7900 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=00007ffc5077b000 CR3=000000000f5ce000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007f5bac84e650 CR3=000000000c4ee000 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=2033333a35343a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a35343a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000