syzkaller login: [ 44.498854] BUG: Bad rss-counter state mm:0000000044b7fb0b type:MM_FILEPAGES val:33 [ 44.499900] BUG: Bad rss-counter state mm:0000000044b7fb0b type:MM_ANONPAGES val:22 [ 44.538694] ================================================================== [ 44.539750] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.540847] Read of size 8 at addr ffff88800cabc310 by task sshd/220 [ 44.541793] [ 44.542093] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.543060] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.544159] Call Trace: [ 44.544547] [ 44.544943] dump_stack_lvl+0x91/0xf0 [ 44.545444] print_report+0xcc/0x620 [ 44.545931] ? __virt_addr_valid+0x102/0x340 [ 44.546493] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.547130] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.547758] kasan_report+0xbe/0xf0 [ 44.548239] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.548876] vma_interval_tree_remove+0xc75/0xec0 [ 44.549490] vma_prepare+0xc54/0x11a0 [ 44.549969] __split_vma+0x5af/0x950 [ 44.550452] ? __pfx___split_vma+0x10/0x10 [ 44.550986] ? find_held_lock+0x2c/0x110 [ 44.551523] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.552089] ? lock_is_held_type+0x9f/0x120 [ 44.552633] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.553249] ? mtree_range_walk+0x632/0x900 [ 44.553800] ? mas_walk+0x5c7/0x7c0 [ 44.554279] do_vmi_munmap+0x1f1/0x2b0 [ 44.554777] mmap_region+0x1f9/0x2660 [ 44.555256] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.555788] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.556503] ? __pfx_lock_acquire+0x10/0x10 [ 44.557033] ? __pfx_mmap_region+0x10/0x10 [ 44.557564] ? security_mmap_addr+0x7d/0xa0 [ 44.558106] ? get_unmapped_area+0x1f5/0x3f0 [ 44.558667] do_mmap+0x854/0xf00 [ 44.559111] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.559627] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.560195] ksys_mmap_pgoff+0x3af/0x500 [ 44.560706] do_syscall_64+0x3f/0x90 [ 44.561192] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.561864] RIP: 0033:0x7f2a61920d82 [ 44.562327] 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 [ 44.564473] RSP: 002b:00007fffd59f0578 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.565373] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2a61920d82 [ 44.566212] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2a60d5a000 [ 44.567066] RBP: 00007f2a60d5a000 R08: 0000000000000009 R09: 0000000000001000 [ 44.567919] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a6e47a4f70 [ 44.568765] R13: 00007fffd59f0590 R14: 00007fffd59f05c0 R15: 00007fffd59f0920 [ 44.569626] [ 44.569915] [ 44.570132] Allocated by task 213: [ 44.570564] kasan_save_stack+0x22/0x50 [ 44.571068] kasan_set_track+0x25/0x30 [ 44.571575] __kasan_slab_alloc+0x59/0x70 [ 44.572097] kmem_cache_alloc+0x16b/0x370 [ 44.572624] vm_area_dup+0x20/0x160 [ 44.573075] __split_vma+0x170/0x950 [ 44.573539] split_vma+0xc6/0x110 [ 44.573975] mprotect_fixup+0x8d2/0xb30 [ 44.574473] do_mprotect_pkey+0x87e/0xd40 [ 44.574999] __x64_sys_mprotect+0x78/0xc0 [ 44.575538] do_syscall_64+0x3f/0x90 [ 44.576013] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.576650] [ 44.576867] Freed by task 213: [ 44.577257] kasan_save_stack+0x22/0x50 [ 44.577759] kasan_set_track+0x25/0x30 [ 44.578251] kasan_save_free_info+0x2b/0x50 [ 44.578783] __kasan_slab_free+0x10a/0x190 [ 44.579316] kmem_cache_free+0x10d/0x4d0 [ 44.579828] rcu_core+0x8c8/0x2860 [ 44.580269] __do_softirq+0x1b7/0x7d4 [ 44.580746] [ 44.580959] Last potentially related work creation: [ 44.581539] kasan_save_stack+0x22/0x50 [ 44.582038] __kasan_record_aux_stack+0x8e/0xa0 [ 44.582612] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.583252] remove_vma+0x139/0x170 [ 44.583769] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.584327] do_vmi_munmap+0x1f1/0x2b0 [ 44.584812] __vm_munmap+0x138/0x3a0 [ 44.585277] __x64_sys_munmap+0x59/0x80 [ 44.585779] do_syscall_64+0x3f/0x90 [ 44.586249] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.586894] [ 44.587108] The buggy address belongs to the object at ffff88800cabc2b8 [ 44.587108] which belongs to the cache vm_area_struct of size 168 [ 44.588570] The buggy address is located 88 bytes inside of [ 44.588570] freed 168-byte region [ffff88800cabc2b8, ffff88800cabc360) [ 44.589963] [ 44.590177] The buggy address belongs to the physical page: [ 44.590828] page:00000000b500a19f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcabc [ 44.591920] memcg:ffff88800c615301 [ 44.592345] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.592991] page_type: 0xffffffff() [ 44.593448] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.594363] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c615301 [ 44.595274] page dumped because: kasan: bad access detected [ 44.595952] [ 44.596167] Memory state around the buggy address: [ 44.596748] ffff88800cabc200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 44.597618] ffff88800cabc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 44.598471] >ffff88800cabc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 44.599319] ^ [ 44.599798] ffff88800cabc380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 44.600665] ffff88800cabc400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 44.601518] ================================================================== [ 44.602507] Disabling lock debugging due to kernel taint [ 46.946414] BUG: Bad rss-counter state mm:000000008bde0c97 type:MM_FILEPAGES val:33 [ 46.947150] BUG: Bad rss-counter state mm:000000008bde0c97 type:MM_ANONPAGES val:22 [ 47.459086] BUG: Bad rss-counter state mm:000000006a34377a type:MM_FILEPAGES val:33 [ 47.460644] BUG: Bad rss-counter state mm:000000006a34377a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9045' (ECDSA) to the list of known hosts. 2023/06/19 23:58:15 fuzzer started 2023/06/19 23:58:16 dialing manager at localhost:44161 2023/06/19 23:58:16 checking machine... 2023/06/19 23:58:16 checking revisions... [ 48.149139] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:58:16 testing simple program... [ 48.192661] cgroup: Unknown subsys name 'net' [ 48.257047] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:58:01 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016c47aa0 RCX=0000000000000001 RDX=1ffff11002d88f54 RSI=ffffffff8460144a RDI=ffff888016c47aac RBP=0000000000000009 RSP=ffff888016c479b8 R8 =0000000000000001 R9 =ffff888016c47a18 R10=0000000000038001 R11=00000000000b523e R12=ffff888016c47aa0 R13=0000000000000000 R14=ffff888016379b40 R15=ffff8880199fa670 RIP=ffffffff813ad4d5 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 00007f2b37fff700 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=00007fbaf91e1740 CR3=00000000197b4000 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=2035313a38353a3332203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a38353a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=ffff88801951b680 RSI=ffffffff83c632c0 RDI=ffffffff87f94830 RBP=0000000000000000 RSP=ffff88801627f6a0 R8 =0000000000000005 R9 =00000000000000ff R10=0000000000000066 R11=00000e8700000e87 R12=0000000000000000 R13=0000000000000066 R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c07f1 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 00007f244ffec900 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=00007fff00d32000 CR3=000000000f1fc000 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=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