syzkaller login: [ 28.739034] BUG: Bad rss-counter state mm:00000000c30f9215 type:MM_FILEPAGES val:33 [ 28.740240] BUG: Bad rss-counter state mm:00000000c30f9215 type:MM_ANONPAGES val:22 [ 28.902839] ================================================================== [ 28.903929] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.905073] Read of size 8 at addr ffff88800ea7c798 by task sshd/219 [ 28.906116] [ 28.906338] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.907207] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.908212] Call Trace: [ 28.908541] [ 28.908843] dump_stack_lvl+0x91/0xf0 [ 28.909342] print_report+0xcc/0x620 [ 28.909825] ? __virt_addr_valid+0x102/0x340 [ 28.910395] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.911019] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.911645] kasan_report+0xbe/0xf0 [ 28.912120] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.912766] vma_interval_tree_remove+0xc75/0xec0 [ 28.913377] vma_prepare+0xc54/0x11a0 [ 28.913870] __split_vma+0x5af/0x950 [ 28.914344] ? __pfx___split_vma+0x10/0x10 [ 28.914877] ? find_held_lock+0x2c/0x110 [ 28.915406] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.915981] ? lock_is_held_type+0x9f/0x120 [ 28.916527] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.917152] ? mtree_range_walk+0x632/0x900 [ 28.917706] ? mas_walk+0x5c7/0x7c0 [ 28.918188] do_vmi_munmap+0x1f1/0x2b0 [ 28.918684] mmap_region+0x1f9/0x2660 [ 28.919169] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.919686] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.920389] ? __pfx_lock_acquire+0x10/0x10 [ 28.920945] ? __pfx_mmap_region+0x10/0x10 [ 28.921491] ? security_mmap_addr+0x7d/0xa0 [ 28.922030] ? get_unmapped_area+0x1f5/0x3f0 [ 28.922575] do_mmap+0x854/0xf00 [ 28.923019] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.923518] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.924074] ksys_mmap_pgoff+0x3af/0x500 [ 28.924582] do_syscall_64+0x3f/0x90 [ 28.925073] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.925714] RIP: 0033:0x7f65ac7efd82 [ 28.926173] 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 [ 28.928298] RSP: 002b:00007ffd00c7fb08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.929211] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f65ac7efd82 [ 28.930069] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f65abc29000 [ 28.930913] RBP: 00007f65abc29000 R08: 0000000000000009 R09: 0000000000001000 [ 28.931770] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558cdbad3d90 [ 28.932629] R13: 00007ffd00c7fb20 R14: 00007ffd00c7fb50 R15: 00007ffd00c7feb0 [ 28.933521] [ 28.933811] [ 28.934027] Allocated by task 212: [ 28.934465] kasan_save_stack+0x22/0x50 [ 28.934974] kasan_set_track+0x25/0x30 [ 28.935469] __kasan_slab_alloc+0x59/0x70 [ 28.935996] kmem_cache_alloc+0x16b/0x370 [ 28.936510] vm_area_dup+0x20/0x160 [ 28.936968] __split_vma+0x170/0x950 [ 28.937443] split_vma+0xc6/0x110 [ 28.937894] mprotect_fixup+0x8d2/0xb30 [ 28.938393] do_mprotect_pkey+0x87e/0xd40 [ 28.938912] __x64_sys_mprotect+0x78/0xc0 [ 28.939426] do_syscall_64+0x3f/0x90 [ 28.939900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.940544] [ 28.940768] Freed by task 212: [ 28.941164] kasan_save_stack+0x22/0x50 [ 28.941668] kasan_set_track+0x25/0x30 [ 28.942159] kasan_save_free_info+0x2b/0x50 [ 28.942691] __kasan_slab_free+0x10a/0x190 [ 28.943226] kmem_cache_free+0x10d/0x4d0 [ 28.943736] rcu_core+0x8c8/0x2860 [ 28.944188] __do_softirq+0x1b7/0x7d4 [ 28.944661] [ 28.944900] Last potentially related work creation: [ 28.945481] kasan_save_stack+0x22/0x50 [ 28.945982] __kasan_record_aux_stack+0x8e/0xa0 [ 28.946689] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.947344] remove_vma+0x139/0x170 [ 28.947796] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.948356] do_vmi_munmap+0x1f1/0x2b0 [ 28.948856] __vm_munmap+0x138/0x3a0 [ 28.949323] __x64_sys_munmap+0x59/0x80 [ 28.949825] do_syscall_64+0x3f/0x90 [ 28.950302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.950944] [ 28.951165] Second to last potentially related work creation: [ 28.951869] kasan_save_stack+0x22/0x50 [ 28.952368] __kasan_record_aux_stack+0x8e/0xa0 [ 28.952957] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.953601] remove_vma+0x139/0x170 [ 28.954047] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.954604] do_vmi_munmap+0x1f1/0x2b0 [ 28.955093] mmap_region+0x1f9/0x2660 [ 28.955576] do_mmap+0x854/0xf00 [ 28.956011] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.956500] ksys_mmap_pgoff+0x3af/0x500 [ 28.957011] do_syscall_64+0x3f/0x90 [ 28.957484] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.958125] [ 28.958340] The buggy address belongs to the object at ffff88800ea7c740 [ 28.958340] which belongs to the cache vm_area_struct of size 168 [ 28.959816] The buggy address is located 88 bytes inside of [ 28.959816] freed 168-byte region [ffff88800ea7c740, ffff88800ea7c7e8) [ 28.961256] [ 28.961471] The buggy address belongs to the physical page: [ 28.962139] page:00000000cfbaa4a5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea7c [ 28.963272] memcg:ffff88800e6bd001 [ 28.963696] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.964405] page_type: 0xffffffff() [ 28.964877] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ba440 dead000000000005 [ 28.965823] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6bd001 [ 28.966744] page dumped because: kasan: bad access detected [ 28.967398] [ 28.967611] Memory state around the buggy address: [ 28.968186] ffff88800ea7c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.969050] ffff88800ea7c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 28.969914] >ffff88800ea7c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 28.970774] ^ [ 28.971268] ffff88800ea7c800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 28.972117] ffff88800ea7c880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 28.972988] ================================================================== [ 28.973913] Disabling lock debugging due to kernel taint [ 30.854346] BUG: Bad rss-counter state mm:0000000089971a3d type:MM_FILEPAGES val:33 [ 30.855263] BUG: Bad rss-counter state mm:0000000089971a3d type:MM_ANONPAGES val:22 [ 31.358893] BUG: Bad rss-counter state mm:00000000a7263fb7 type:MM_FILEPAGES val:33 [ 31.360217] BUG: Bad rss-counter state mm:00000000a7263fb7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15120' (ECDSA) to the list of known hosts. 2023/06/20 20:17:48 fuzzer started 2023/06/20 20:17:49 dialing manager at localhost:36067 2023/06/20 20:17:49 checking machine... 2023/06/20 20:17:49 checking revisions... [ 32.093906] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:17:49 testing simple program... [ 32.125364] cgroup: Unknown subsys name 'net' [ 32.178003] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:17:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09b30 RCX=0000000000000000 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff88806ce09a98 RBP=ffffffff8542a6c0 RSP=ffff88806ce09a40 R8 =0000000000000004 R9 =0000000000000000 R10=ffff88806ce09a98 R11=0000000000000000 R12=0000000000000000 R13=ffff88806ce09ac0 R14=ffffffff8542a6c0 R15=ffff88806ce09a98 RIP=ffffffff8451341a RFL=00000247 [---Z-PC] 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 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=00007ffc339b2e38 CR3=0000000016a8e000 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=2038343a37313a3032203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a37313a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88806cf09ff0 RSI=ffff88806cf09fb8 RDI=ffff88806cf09a98 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800e549670 RIP=ffffffff81130340 RFL=00000202 [-------] 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=00007fdee7683e30 CR3=0000000008ec2000 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=eeb826320004baa9ed40bfc48ec2ac0c XMM02=ec2efd57dc4c00df000000000011d5c8 XMM03=f7f1eb6998f46d40000000000011d698 XMM04=46309d1538bb0db500000000000ae988 XMM05=dfcdbad4f1609c370000000000132e80 XMM06=806171799158d9670000000000132d08 XMM07=e042d86d42eb936e0000000000121f18 XMM08=f7f1eb6998f46d40000000000011d698 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000