syzkaller login: [ 61.658599] BUG: Bad rss-counter state mm:000000000e59ec12 type:MM_FILEPAGES val:33 [ 61.659603] BUG: Bad rss-counter state mm:000000000e59ec12 type:MM_ANONPAGES val:22 [ 61.824403] ================================================================== [ 61.825508] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.826506] Read of size 8 at addr ffff888009330880 by task sshd/220 [ 61.827425] [ 61.827653] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 61.828542] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.829540] Call Trace: [ 61.829863] [ 61.830150] dump_stack_lvl+0x91/0xf0 [ 61.830648] print_report+0xcc/0x620 [ 61.831136] ? __virt_addr_valid+0x102/0x340 [ 61.831684] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.832309] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.832938] kasan_report+0xbe/0xf0 [ 61.833442] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.834074] vma_interval_tree_remove+0xc75/0xec0 [ 61.834685] vma_prepare+0xc54/0x11a0 [ 61.835167] __split_vma+0x5af/0x950 [ 61.835644] ? __pfx___split_vma+0x10/0x10 [ 61.836182] ? find_held_lock+0x2c/0x110 [ 61.836706] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.837293] ? lock_is_held_type+0x9f/0x120 [ 61.837839] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.838457] ? mtree_range_walk+0x632/0x900 [ 61.839018] ? mas_walk+0x5c7/0x7c0 [ 61.839496] do_vmi_munmap+0x1f1/0x2b0 [ 61.840001] mmap_region+0x1f9/0x2660 [ 61.840489] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.841003] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.841724] ? __pfx_lock_acquire+0x10/0x10 [ 61.842259] ? __pfx_mmap_region+0x10/0x10 [ 61.842789] ? security_mmap_addr+0x7d/0xa0 [ 61.843318] ? get_unmapped_area+0x1f5/0x3f0 [ 61.843862] do_mmap+0x854/0xf00 [ 61.844306] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.844799] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.845389] ksys_mmap_pgoff+0x3af/0x500 [ 61.845897] do_syscall_64+0x3f/0x90 [ 61.846388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.847044] RIP: 0033:0x7f7387778d82 [ 61.847508] 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 [ 61.849655] RSP: 002b:00007fffe8ae7df8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.850567] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7387778d82 [ 61.851408] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7386bb2000 [ 61.852250] RBP: 00007f7386bb2000 R08: 0000000000000009 R09: 0000000000001000 [ 61.853100] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f26179eec0 [ 61.853949] R13: 00007fffe8ae7e10 R14: 00007fffe8ae7e40 R15: 00007fffe8ae81a0 [ 61.854809] [ 61.855110] [ 61.855326] Allocated by task 212: [ 61.855757] kasan_save_stack+0x22/0x50 [ 61.856267] kasan_set_track+0x25/0x30 [ 61.856758] __kasan_slab_alloc+0x59/0x70 [ 61.857310] kmem_cache_alloc+0x16b/0x370 [ 61.857844] vm_area_dup+0x20/0x160 [ 61.858311] __split_vma+0x170/0x950 [ 61.858783] split_vma+0xc6/0x110 [ 61.859231] mprotect_fixup+0x8d2/0xb30 [ 61.859741] do_mprotect_pkey+0x87e/0xd40 [ 61.860271] __x64_sys_mprotect+0x78/0xc0 [ 61.860791] do_syscall_64+0x3f/0x90 [ 61.861285] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.861931] [ 61.862146] Freed by task 212: [ 61.862535] kasan_save_stack+0x22/0x50 [ 61.863037] kasan_set_track+0x25/0x30 [ 61.863529] kasan_save_free_info+0x2b/0x50 [ 61.864071] __kasan_slab_free+0x10a/0x190 [ 61.864602] kmem_cache_free+0x10d/0x4d0 [ 61.865133] rcu_core+0x8c8/0x2860 [ 61.865586] __do_softirq+0x1b7/0x7d4 [ 61.866062] [ 61.866276] Last potentially related work creation: [ 61.866855] kasan_save_stack+0x22/0x50 [ 61.867358] __kasan_record_aux_stack+0x8e/0xa0 [ 61.867936] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.868580] remove_vma+0x139/0x170 [ 61.869032] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.869606] do_vmi_munmap+0x1f1/0x2b0 [ 61.870106] __vm_munmap+0x138/0x3a0 [ 61.870574] __x64_sys_munmap+0x59/0x80 [ 61.871071] do_syscall_64+0x3f/0x90 [ 61.871546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.872196] [ 61.872410] Second to last potentially related work creation: [ 61.873107] kasan_save_stack+0x22/0x50 [ 61.873613] __kasan_record_aux_stack+0x8e/0xa0 [ 61.874192] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.874841] remove_vma+0x139/0x170 [ 61.875299] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.875859] do_vmi_munmap+0x1f1/0x2b0 [ 61.876355] mmap_region+0x1f9/0x2660 [ 61.876831] do_mmap+0x854/0xf00 [ 61.877285] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.877778] ksys_mmap_pgoff+0x3af/0x500 [ 61.878290] do_syscall_64+0x3f/0x90 [ 61.878762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.879407] [ 61.879625] The buggy address belongs to the object at ffff888009330828 [ 61.879625] which belongs to the cache vm_area_struct of size 168 [ 61.881103] The buggy address is located 88 bytes inside of [ 61.881103] freed 168-byte region [ffff888009330828, ffff8880093308d0) [ 61.882502] [ 61.882720] The buggy address belongs to the physical page: [ 61.883380] page:000000009582b9d4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9330 [ 61.884456] memcg:ffff88800d6c9701 [ 61.884879] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 61.885590] page_type: 0xffffffff() [ 61.886065] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 61.886983] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6c9701 [ 61.887882] page dumped because: kasan: bad access detected [ 61.888538] [ 61.888757] Memory state around the buggy address: [ 61.889370] ffff888009330780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 61.890252] ffff888009330800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 61.891130] >ffff888009330880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 61.892015] ^ [ 61.892448] ffff888009330900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.893316] ffff888009330980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 61.894176] ================================================================== [ 61.895143] Disabling lock debugging due to kernel taint [ 64.030016] BUG: Bad rss-counter state mm:00000000253414fb type:MM_FILEPAGES val:33 [ 64.031001] BUG: Bad rss-counter state mm:00000000253414fb type:MM_ANONPAGES val:22 [ 64.519127] BUG: Bad rss-counter state mm:000000009421b755 type:MM_FILEPAGES val:33 [ 64.520114] BUG: Bad rss-counter state mm:000000009421b755 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40637' (ECDSA) to the list of known hosts. 2023/06/19 20:49:51 fuzzer started 2023/06/19 20:49:52 dialing manager at localhost:44161 2023/06/19 20:49:52 checking machine... 2023/06/19 20:49:52 checking revisions... [ 65.362715] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:49:52 testing simple program... [ 65.409666] cgroup: Unknown subsys name 'net' [ 65.463270] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:49:28 Registers: info registers vcpu 0 RAX=00007f13fc000ba4 RBX=00007f140b0db76c RCX=00000000000702d2 RDX=00007f140b0db76c RSI=00007f140b0db788 RDI=00007f140b0db7e0 RBP=000055cd0dc011c0 RSP=00007f140b0db6f0 R8 =00007f13fc007ee0 R9 =00007f13fc0008d0 R10=00007f140b62eb80 R11=0000000000000000 R12=00007f140b0db7e0 R13=0000000000001fa0 R14=00007f13fc000ba0 R15=00007f140b0db788 RIP=000055cd0c6dfe62 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f140b0df700 00000000 00000000 GS =0000 0000000000000000 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=00007f5287b1d028 CR3=000000000ed7a000 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=39343a3032203931206e754a3e38333c XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a38333239352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383332 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf39500 RCX=0000000000000000 RDX=ffffed10011b0f4f RSI=0000000000000008 RDI=ffff88806cf39504 RBP=1ffff110011b0f4f RSP=ffff888008d87a70 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000003 R12=ffff88806cf39500 R13=ffff888008d71b40 R14=ffff888008d87c98 R15=ffff888008d87dc0 RIP=ffffffff812e0017 RFL=00000012 [----A--] 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=00007ffd72a7e000 CR3=000000000d9fc000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000