syzkaller login: [ 42.178622] BUG: Bad rss-counter state mm:0000000010f99da4 type:MM_FILEPAGES val:33 [ 42.179827] BUG: Bad rss-counter state mm:0000000010f99da4 type:MM_ANONPAGES val:22 [ 42.343730] ================================================================== [ 42.344709] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.345859] Read of size 8 at addr ffff88800c6b2968 by task sshd/218 [ 42.346689] [ 42.346924] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.347945] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.348965] Call Trace: [ 42.349299] [ 42.349596] dump_stack_lvl+0x91/0xf0 [ 42.350109] print_report+0xcc/0x620 [ 42.350650] ? __virt_addr_valid+0x102/0x340 [ 42.351232] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.351880] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.352535] kasan_report+0xbe/0xf0 [ 42.353032] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.353683] vma_interval_tree_remove+0xc75/0xec0 [ 42.354317] vma_prepare+0xc54/0x11a0 [ 42.354830] __split_vma+0x5af/0x950 [ 42.355325] ? __pfx___split_vma+0x10/0x10 [ 42.355885] ? find_held_lock+0x2c/0x110 [ 42.356435] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.357037] ? lock_is_held_type+0x9f/0x120 [ 42.357615] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.358265] ? mtree_range_walk+0x632/0x900 [ 42.358870] ? mas_walk+0x5c7/0x7c0 [ 42.359398] do_vmi_munmap+0x1f1/0x2b0 [ 42.360011] mmap_region+0x1f9/0x2660 [ 42.360644] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.361309] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.362243] ? __pfx_lock_acquire+0x10/0x10 [ 42.362950] ? __pfx_mmap_region+0x10/0x10 [ 42.363627] ? security_mmap_addr+0x7d/0xa0 [ 42.364315] ? get_unmapped_area+0x1f5/0x3f0 [ 42.365034] do_mmap+0x854/0xf00 [ 42.365598] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.366245] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.366997] ksys_mmap_pgoff+0x3af/0x500 [ 42.367656] do_syscall_64+0x3f/0x90 [ 42.368272] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.369095] RIP: 0033:0x7f5a6e689d82 [ 42.369636] 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 [ 42.372123] RSP: 002b:00007fffc3546c68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.373093] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a6e689d82 [ 42.374018] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a6dac3000 [ 42.374941] RBP: 00007f5a6dac3000 R08: 0000000000000009 R09: 0000000000001000 [ 42.375855] R10: 0000000000000812 R11: 0000000000000206 R12: 000055be1c000ec0 [ 42.376755] R13: 00007fffc3546c80 R14: 00007fffc3546cb0 R15: 00007fffc3547010 [ 42.377676] [ 42.377990] [ 42.378222] Allocated by task 211: [ 42.378702] kasan_save_stack+0x22/0x50 [ 42.379244] kasan_set_track+0x25/0x30 [ 42.379776] __kasan_slab_alloc+0x59/0x70 [ 42.380331] kmem_cache_alloc+0x16b/0x370 [ 42.380873] vm_area_dup+0x20/0x160 [ 42.381350] __split_vma+0x170/0x950 [ 42.381844] split_vma+0xc6/0x110 [ 42.382313] mprotect_fixup+0x8d2/0xb30 [ 42.382871] do_mprotect_pkey+0x87e/0xd40 [ 42.383423] __x64_sys_mprotect+0x78/0xc0 [ 42.383978] do_syscall_64+0x3f/0x90 [ 42.384488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.385171] [ 42.385398] Freed by task 211: [ 42.385819] kasan_save_stack+0x22/0x50 [ 42.386366] kasan_set_track+0x25/0x30 [ 42.386897] kasan_save_free_info+0x2b/0x50 [ 42.387463] __kasan_slab_free+0x10a/0x190 [ 42.388022] kmem_cache_free+0x10d/0x4d0 [ 42.388558] rcu_core+0x8c8/0x2860 [ 42.389028] __do_softirq+0x1b7/0x7d4 [ 42.389532] [ 42.389763] Last potentially related work creation: [ 42.390382] kasan_save_stack+0x22/0x50 [ 42.390932] __kasan_record_aux_stack+0x8e/0xa0 [ 42.391537] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.392219] remove_vma+0x139/0x170 [ 42.392705] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.393295] do_vmi_munmap+0x1f1/0x2b0 [ 42.393818] __vm_munmap+0x138/0x3a0 [ 42.394312] __x64_sys_munmap+0x59/0x80 [ 42.394869] do_syscall_64+0x3f/0x90 [ 42.395371] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.396050] [ 42.396281] Second to last potentially related work creation: [ 42.397017] kasan_save_stack+0x22/0x50 [ 42.397550] __kasan_record_aux_stack+0x8e/0xa0 [ 42.398160] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.398850] remove_vma+0x139/0x170 [ 42.399336] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.399926] do_vmi_munmap+0x1f1/0x2b0 [ 42.400439] mmap_region+0x1f9/0x2660 [ 42.400940] do_mmap+0x854/0xf00 [ 42.401405] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.401925] ksys_mmap_pgoff+0x3af/0x500 [ 42.402462] do_syscall_64+0x3f/0x90 [ 42.402990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.403673] [ 42.403899] The buggy address belongs to the object at ffff88800c6b2910 [ 42.403899] which belongs to the cache vm_area_struct of size 168 [ 42.405470] The buggy address is located 88 bytes inside of [ 42.405470] freed 168-byte region [ffff88800c6b2910, ffff88800c6b29b8) [ 42.406979] [ 42.407207] The buggy address belongs to the physical page: [ 42.407908] page:00000000024ca40b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6b2 [ 42.409055] memcg:ffff888009481801 [ 42.409501] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.410181] page_type: 0xffffffff() [ 42.410668] raw: 0100000000000200 ffff88800879fc80 ffffea00003895c0 dead000000000002 [ 42.411651] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009481801 [ 42.412613] page dumped because: kasan: bad access detected [ 42.413311] [ 42.413537] Memory state around the buggy address: [ 42.414156] ffff88800c6b2800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 42.415082] ffff88800c6b2880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 42.415989] >ffff88800c6b2900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.416892] ^ [ 42.417719] ffff88800c6b2980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 42.418642] ffff88800c6b2a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.419532] ================================================================== [ 42.420718] Disabling lock debugging due to kernel taint [ 44.574575] BUG: Bad rss-counter state mm:000000003dff8c5e type:MM_FILEPAGES val:33 [ 44.575852] BUG: Bad rss-counter state mm:000000003dff8c5e type:MM_ANONPAGES val:22 [ 45.124555] BUG: Bad rss-counter state mm:000000008f9d64fd type:MM_FILEPAGES val:33 [ 45.125809] BUG: Bad rss-counter state mm:000000008f9d64fd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2293' (ECDSA) to the list of known hosts. 2023/06/19 22:13:30 fuzzer started 2023/06/19 22:13:31 dialing manager at localhost:44161 2023/06/19 22:13:31 checking machine... 2023/06/19 22:13:31 checking revisions... [ 45.842439] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:13:31 testing simple program... [ 45.895386] cgroup: Unknown subsys name 'net' [ 45.943800] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:13:27 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806cf395c0 RCX=0000000000000000 RDX=1ffff11002b3a6f0 RSI=00000000000000eb RDI=ffff8880159d3780 RBP=0000000000000009 RSP=ffff88800ee8f608 R8 =00000000000f7800 R9 =ffff88806cf3965c R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffffffff85d3d010 R14=ffff8880159d37c0 R15=ffff8880159d3700 RIP=ffffffff81255bce RFL=00000046 [---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 00007f0c86cab700 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=000055bfa88b9000 CR3=000000000f156000 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=2030333a33313a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a33313a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000050 RBX=ffff88800f428000 RCX=0000000000000000 RDX=0000000000010376 RSI=ffffffff821920cb RDI=0000000000000007 RBP=0000000000010376 RSP=ffff88800f5ef418 R8 =0000000000000007 R9 =0000000000010000 R10=0000000000010376 R11=0000000000000128 R12=0000000000010376 R13=ffffed1001e85001 R14=dffffc0000000000 R15=0000000000000000 RIP=ffffffff821920cf RFL=00000093 [--S-A-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 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=00007f71007b3a18 CR3=000000000caea000 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=a01ce82c5adaf097524d741d8bcabfea XMM02=000000000011e898ec2efd57dc4c00df XMM03=0000000000124ac0f0bcc765fa08a823 XMM04=4d1ff2f6824c002d00000000000ae988 XMM05=dfcdbad4f1609c3700000000001361e0 XMM06=e9abf841e7fd88ed0000000000135048 XMM07=e042d86d42eb936e0000000000124d40 XMM08=f0bcc765fa08a823000000000011e8f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000