syzkaller login: [ 30.045513] BUG: Bad rss-counter state mm:0000000032d33c28 type:MM_FILEPAGES val:33 [ 30.046791] BUG: Bad rss-counter state mm:0000000032d33c28 type:MM_ANONPAGES val:22 [ 30.214132] ================================================================== [ 30.215060] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.216024] Read of size 8 at addr ffff88800cb176b0 by task sshd/219 [ 30.216802] [ 30.217028] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.218032] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.219031] Call Trace: [ 30.219381] [ 30.219674] dump_stack_lvl+0x91/0xf0 [ 30.220172] print_report+0xcc/0x620 [ 30.220664] ? __virt_addr_valid+0x102/0x340 [ 30.221223] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.221842] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.222468] kasan_report+0xbe/0xf0 [ 30.222958] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.223597] vma_interval_tree_remove+0xc75/0xec0 [ 30.224208] vma_prepare+0xc54/0x11a0 [ 30.224694] __split_vma+0x5af/0x950 [ 30.225170] ? __pfx___split_vma+0x10/0x10 [ 30.225710] ? find_held_lock+0x2c/0x110 [ 30.226233] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.226815] ? lock_is_held_type+0x9f/0x120 [ 30.227387] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.228018] ? mtree_range_walk+0x632/0x900 [ 30.228587] ? mas_walk+0x5c7/0x7c0 [ 30.229070] do_vmi_munmap+0x1f1/0x2b0 [ 30.229574] mmap_region+0x1f9/0x2660 [ 30.230063] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.230591] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.231324] ? __pfx_lock_acquire+0x10/0x10 [ 30.231864] ? __pfx_mmap_region+0x10/0x10 [ 30.232405] ? security_mmap_addr+0x7d/0xa0 [ 30.232938] ? get_unmapped_area+0x1f5/0x3f0 [ 30.233511] do_mmap+0x854/0xf00 [ 30.233960] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.234465] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.235046] ksys_mmap_pgoff+0x3af/0x500 [ 30.235585] do_syscall_64+0x3f/0x90 [ 30.236072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.236733] RIP: 0033:0x7fd678b9cd82 [ 30.237198] 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 [ 30.239362] RSP: 002b:00007ffd08ff84e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.240276] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd678b9cd82 [ 30.241145] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd677fd6000 [ 30.242010] RBP: 00007fd677fd6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.242865] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560810d05ec0 [ 30.243757] R13: 00007ffd08ff8500 R14: 00007ffd08ff8530 R15: 00007ffd08ff8890 [ 30.244624] [ 30.244917] [ 30.245134] Allocated by task 212: [ 30.245563] kasan_save_stack+0x22/0x50 [ 30.246072] kasan_set_track+0x25/0x30 [ 30.246568] __kasan_slab_alloc+0x59/0x70 [ 30.247100] kmem_cache_alloc+0x16b/0x370 [ 30.247632] vm_area_dup+0x20/0x160 [ 30.248088] __split_vma+0x170/0x950 [ 30.248557] split_vma+0xc6/0x110 [ 30.248996] mprotect_fixup+0x8d2/0xb30 [ 30.249497] do_mprotect_pkey+0x87e/0xd40 [ 30.250020] __x64_sys_mprotect+0x78/0xc0 [ 30.250545] do_syscall_64+0x3f/0x90 [ 30.251017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.251684] [ 30.251899] Freed by task 202: [ 30.252297] kasan_save_stack+0x22/0x50 [ 30.252818] kasan_set_track+0x25/0x30 [ 30.253322] kasan_save_free_info+0x2b/0x50 [ 30.253862] __kasan_slab_free+0x10a/0x190 [ 30.254403] kmem_cache_free+0x10d/0x4d0 [ 30.254915] rcu_core+0x8c8/0x2860 [ 30.255381] __do_softirq+0x1b7/0x7d4 [ 30.255876] [ 30.256094] Last potentially related work creation: [ 30.256679] kasan_save_stack+0x22/0x50 [ 30.257183] __kasan_record_aux_stack+0x8e/0xa0 [ 30.257764] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.258424] remove_vma+0x139/0x170 [ 30.258880] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.259455] do_vmi_munmap+0x1f1/0x2b0 [ 30.259955] __vm_munmap+0x138/0x3a0 [ 30.260433] __x64_sys_munmap+0x59/0x80 [ 30.260936] do_syscall_64+0x3f/0x90 [ 30.261418] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.262060] [ 30.262278] The buggy address belongs to the object at ffff88800cb17658 [ 30.262278] which belongs to the cache vm_area_struct of size 168 [ 30.263771] The buggy address is located 88 bytes inside of [ 30.263771] freed 168-byte region [ffff88800cb17658, ffff88800cb17700) [ 30.265186] [ 30.265405] The buggy address belongs to the physical page: [ 30.266083] page:00000000ab67eed1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb17 [ 30.267190] memcg:ffff88800cb12101 [ 30.267633] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.268288] page_type: 0xffffffff() [ 30.268756] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.269691] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb12101 [ 30.270612] page dumped because: kasan: bad access detected [ 30.271298] [ 30.271519] Memory state around the buggy address: [ 30.272106] ffff88800cb17580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.272969] ffff88800cb17600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.273837] >ffff88800cb17680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.274688] ^ [ 30.275275] ffff88800cb17700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.276159] ffff88800cb17780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.277012] ================================================================== [ 30.277990] Disabling lock debugging due to kernel taint [ 32.620452] BUG: Bad rss-counter state mm:00000000b880b524 type:MM_FILEPAGES val:33 [ 32.621442] BUG: Bad rss-counter state mm:00000000b880b524 type:MM_ANONPAGES val:22 [ 33.017247] BUG: Bad rss-counter state mm:00000000c88fc6bf type:MM_FILEPAGES val:33 [ 33.018451] BUG: Bad rss-counter state mm:00000000c88fc6bf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63433' (ECDSA) to the list of known hosts. 2023/06/20 11:23:27 fuzzer started 2023/06/20 11:23:27 dialing manager at localhost:36067 2023/06/20 11:23:27 checking machine... 2023/06/20 11:23:27 checking revisions... [ 33.733801] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:23:27 testing simple program... [ 33.766653] cgroup: Unknown subsys name 'net' [ 33.809400] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:23:27 Registers: info registers vcpu 0 RAX=ffffea00006e1d48 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffffd40000d93b1 RSI=ffffffff8170f63d RDI=ffffea00006c9d88 RBP=ffff888016e77d90 RSP=ffff888016e77c00 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffea00006c9d80 R13=ffff88800d80aae0 R14=ffff888016e77db8 R15=0000000000000000 RIP=ffffffff8170f662 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc52484a900 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=0000562552e39654 CR3=000000000e386000 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=00000000000000000000562551405060 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff85d3e490 RBX=0000000000000000 RCX=00000007adf56a7c RDX=1ffff110011b4f22 RSI=ffff888008f2b680 RDI=ffff88806cf39500 RBP=ffff888008da7990 RSP=ffff888008da77b0 R8 =ffff88806cf39f40 R9 =ffffed10011b4ee8 R10=0000000000000003 R11=0000000000000001 R12=ffff888008f2b728 R13=ffff888008da7910 R14=ffff888008da7910 R15=dffffc0000000000 RIP=ffffffff81251e37 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 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=00007ffc084eae68 CR3=0000000015d02000 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=2036323a33323a3131203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a33323a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000