syzkaller login: [ 28.884990] BUG: Bad rss-counter state mm:00000000499197b9 type:MM_FILEPAGES val:33 [ 28.886126] BUG: Bad rss-counter state mm:00000000499197b9 type:MM_ANONPAGES val:22 [ 28.928523] ================================================================== [ 28.929607] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.930763] Read of size 8 at addr ffff88800965fb38 by task sshd/219 [ 28.931707] [ 28.931970] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.933037] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.934246] Call Trace: [ 28.934624] [ 28.934965] dump_stack_lvl+0x91/0xf0 [ 28.935733] print_report+0xcc/0x620 [ 28.936317] ? __virt_addr_valid+0x102/0x340 [ 28.936989] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.937761] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.938504] kasan_report+0xbe/0xf0 [ 28.939064] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.939816] vma_interval_tree_remove+0xc75/0xec0 [ 28.940551] vma_prepare+0xc54/0x11a0 [ 28.941067] __split_vma+0x5af/0x950 [ 28.941551] ? __pfx___split_vma+0x10/0x10 [ 28.942081] ? find_held_lock+0x2c/0x110 [ 28.942609] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.943180] ? lock_is_held_type+0x9f/0x120 [ 28.943722] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.944345] ? mtree_range_walk+0x632/0x900 [ 28.944962] ? mas_walk+0x5c7/0x7c0 [ 28.945513] do_vmi_munmap+0x1f1/0x2b0 [ 28.946092] mmap_region+0x1f9/0x2660 [ 28.946652] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.947254] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.948090] ? __pfx_lock_acquire+0x10/0x10 [ 28.948720] ? __pfx_mmap_region+0x10/0x10 [ 28.949317] ? security_mmap_addr+0x7d/0xa0 [ 28.949921] ? get_unmapped_area+0x1f5/0x3f0 [ 28.950553] do_mmap+0x854/0xf00 [ 28.951051] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.951618] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.952284] ksys_mmap_pgoff+0x3af/0x500 [ 28.952848] do_syscall_64+0x3f/0x90 [ 28.953399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.954134] RIP: 0033:0x7fd2f1a72d82 [ 28.954668] 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 [ 28.957126] RSP: 002b:00007ffd7d798588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.958186] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd2f1a72d82 [ 28.959176] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd2f0eac000 [ 28.960160] RBP: 00007fd2f0eac000 R08: 0000000000000009 R09: 0000000000001000 [ 28.961196] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555f28cf7f60 [ 28.962211] R13: 00007ffd7d7985a0 R14: 00007ffd7d7985d0 R15: 00007ffd7d798930 [ 28.963206] [ 28.963561] [ 28.963822] Allocated by task 212: [ 28.964353] kasan_save_stack+0x22/0x50 [ 28.964941] kasan_set_track+0x25/0x30 [ 28.965525] __kasan_slab_alloc+0x59/0x70 [ 28.966146] kmem_cache_alloc+0x16b/0x370 [ 28.966766] vm_area_dup+0x20/0x160 [ 28.967312] __split_vma+0x170/0x950 [ 28.967851] split_vma+0xc6/0x110 [ 28.968399] mprotect_fixup+0x8d2/0xb30 [ 28.968994] do_mprotect_pkey+0x87e/0xd40 [ 28.969619] __x64_sys_mprotect+0x78/0xc0 [ 28.970227] do_syscall_64+0x3f/0x90 [ 28.970792] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.971545] [ 28.971789] Freed by task 212: [ 28.972267] kasan_save_stack+0x22/0x50 [ 28.972847] kasan_set_track+0x25/0x30 [ 28.973414] kasan_save_free_info+0x2b/0x50 [ 28.974025] __kasan_slab_free+0x10a/0x190 [ 28.974638] kmem_cache_free+0x10d/0x4d0 [ 28.975222] rcu_core+0x8c8/0x2860 [ 28.975733] __do_softirq+0x1b7/0x7d4 [ 28.976287] [ 28.976538] Last potentially related work creation: [ 28.977219] kasan_save_stack+0x22/0x50 [ 28.977779] __kasan_record_aux_stack+0x8e/0xa0 [ 28.978434] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.979166] remove_vma+0x139/0x170 [ 28.979692] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.980360] do_vmi_munmap+0x1f1/0x2b0 [ 28.980912] __vm_munmap+0x138/0x3a0 [ 28.981438] __x64_sys_munmap+0x59/0x80 [ 28.982012] do_syscall_64+0x3f/0x90 [ 28.982549] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.983299] [ 28.983544] Second to last potentially related work creation: [ 28.984246] kasan_save_stack+0x22/0x50 [ 28.984731] __kasan_record_aux_stack+0x8e/0xa0 [ 28.985283] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.985895] remove_vma+0x139/0x170 [ 28.986335] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.986868] do_vmi_munmap+0x1f1/0x2b0 [ 28.987336] mmap_region+0x1f9/0x2660 [ 28.987798] do_mmap+0x854/0xf00 [ 28.988232] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.988707] ksys_mmap_pgoff+0x3af/0x500 [ 28.989184] do_syscall_64+0x3f/0x90 [ 28.989637] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.990252] [ 28.990456] The buggy address belongs to the object at ffff88800965fae0 [ 28.990456] which belongs to the cache vm_area_struct of size 168 [ 28.991876] The buggy address is located 88 bytes inside of [ 28.991876] freed 168-byte region [ffff88800965fae0, ffff88800965fb88) [ 28.993245] [ 28.993453] The buggy address belongs to the physical page: [ 28.994085] page:000000008b217392 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x965f [ 28.995129] memcg:ffff88800dc55a01 [ 28.995540] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.996223] page_type: 0xffffffff() [ 28.996660] raw: 0100000000000200 ffff8880087a0c80 ffffea00004099c0 dead000000000005 [ 28.997537] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc55a01 [ 28.998404] page dumped because: kasan: bad access detected [ 28.999027] [ 28.999231] Memory state around the buggy address: [ 28.999782] ffff88800965fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.000619] ffff88800965fa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 29.001436] >ffff88800965fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.002253] ^ [ 29.002841] ffff88800965fb80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 29.003671] ffff88800965fc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 29.004504] ================================================================== [ 29.005924] Disabling lock debugging due to kernel taint [ 30.961514] BUG: Bad rss-counter state mm:00000000805fefcc type:MM_FILEPAGES val:33 [ 30.962610] BUG: Bad rss-counter state mm:00000000805fefcc type:MM_ANONPAGES val:22 [ 31.424482] BUG: Bad rss-counter state mm:000000006734be3a type:MM_FILEPAGES val:33 [ 31.425733] BUG: Bad rss-counter state mm:000000006734be3a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5958' (ECDSA) to the list of known hosts. 2023/06/21 01:19:12 fuzzer started 2023/06/21 01:19:12 dialing manager at localhost:36067 2023/06/21 01:19:12 checking machine... 2023/06/21 01:19:12 checking revisions... [ 32.129064] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:19:12 testing simple program... [ 32.175501] cgroup: Unknown subsys name 'net' [ 32.210872] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:19:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100d9c135f RSI=ffffffff8363255d RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000002449d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff8880169e9b40 R15=ffff88806ce09a98 RIP=ffffffff81130682 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 00007f37795f5900 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=00007f3779bac618 CR3=00000000185c2000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fd13f18da60 CR3=000000000d4ba000 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=00000000000000000000000000000000 XMM01=e8d025e4de4407b32344f0a6854cb2c8 XMM02=2c67c8bc2e329bc3000000000011ddf0 XMM03=fb795ef6d65770560000000000121d68 XMM04=dfec7de2f9c365fa00000000000ae988 XMM05=19e9129bd510f2350000000000133628 XMM06=242dd2f7f683aa840000000000132490 XMM07=e042d86d42eb936e0000000000122040 XMM08=5e2efa630969745c000000000011de50 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000