syzkaller login: [ 30.707066] BUG: Bad rss-counter state mm:00000000bc4a7b6f type:MM_FILEPAGES val:33 [ 30.708097] BUG: Bad rss-counter state mm:00000000bc4a7b6f type:MM_ANONPAGES val:22 [ 30.868267] ================================================================== [ 30.869206] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.870144] Read of size 8 at addr ffff888016e44df0 by task sshd/221 [ 30.870908] [ 30.871126] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.872093] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.873093] Call Trace: [ 30.873415] [ 30.873713] dump_stack_lvl+0x91/0xf0 [ 30.874201] print_report+0xcc/0x620 [ 30.874687] ? __virt_addr_valid+0x102/0x340 [ 30.875237] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.875849] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.876455] kasan_report+0xbe/0xf0 [ 30.876945] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.877564] vma_interval_tree_remove+0xc75/0xec0 [ 30.878166] vma_prepare+0xc54/0x11a0 [ 30.878643] __split_vma+0x5af/0x950 [ 30.879116] ? __pfx___split_vma+0x10/0x10 [ 30.879647] ? find_held_lock+0x2c/0x110 [ 30.880166] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.880741] ? lock_is_held_type+0x9f/0x120 [ 30.881278] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.881892] ? mtree_range_walk+0x632/0x900 [ 30.882444] ? mas_walk+0x5c7/0x7c0 [ 30.882922] do_vmi_munmap+0x1f1/0x2b0 [ 30.883410] mmap_region+0x1f9/0x2660 [ 30.883894] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.884400] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.885134] ? __pfx_lock_acquire+0x10/0x10 [ 30.885660] ? __pfx_mmap_region+0x10/0x10 [ 30.886191] ? security_mmap_addr+0x7d/0xa0 [ 30.886723] ? get_unmapped_area+0x1f5/0x3f0 [ 30.887274] do_mmap+0x854/0xf00 [ 30.887713] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.888202] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.888770] ksys_mmap_pgoff+0x3af/0x500 [ 30.889278] do_syscall_64+0x3f/0x90 [ 30.889760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.890402] RIP: 0033:0x7fd222705d82 [ 30.890862] 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 [ 30.892981] RSP: 002b:00007ffd389c7008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.893877] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd222705d82 [ 30.894723] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd221b3f000 [ 30.895564] RBP: 00007fd221b3f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.896412] R10: 0000000000000812 R11: 0000000000000206 R12: 00005652b9537f70 [ 30.897276] R13: 00007ffd389c7020 R14: 00007ffd389c7050 R15: 00007ffd389c73b0 [ 30.898142] [ 30.898435] [ 30.898655] Allocated by task 214: [ 30.899079] kasan_save_stack+0x22/0x50 [ 30.899578] kasan_set_track+0x25/0x30 [ 30.900077] __kasan_slab_alloc+0x59/0x70 [ 30.900602] kmem_cache_alloc+0x16b/0x370 [ 30.901122] vm_area_dup+0x20/0x160 [ 30.901575] __split_vma+0x170/0x950 [ 30.902047] split_vma+0xc6/0x110 [ 30.902482] mprotect_fixup+0x8d2/0xb30 [ 30.902980] do_mprotect_pkey+0x87e/0xd40 [ 30.903497] __x64_sys_mprotect+0x78/0xc0 [ 30.904016] do_syscall_64+0x3f/0x90 [ 30.904493] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.905149] [ 30.905366] Freed by task 214: [ 30.905760] kasan_save_stack+0x22/0x50 [ 30.906264] kasan_set_track+0x25/0x30 [ 30.906754] kasan_save_free_info+0x2b/0x50 [ 30.907284] __kasan_slab_free+0x10a/0x190 [ 30.907816] kmem_cache_free+0x10d/0x4d0 [ 30.908324] rcu_core+0x8c8/0x2860 [ 30.908780] __do_softirq+0x1b7/0x7d4 [ 30.909256] [ 30.909476] Last potentially related work creation: [ 30.910056] kasan_save_stack+0x22/0x50 [ 30.910559] __kasan_record_aux_stack+0x8e/0xa0 [ 30.911125] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.911765] remove_vma+0x139/0x170 [ 30.912300] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.912872] do_vmi_munmap+0x1f1/0x2b0 [ 30.913357] __vm_munmap+0x138/0x3a0 [ 30.913853] __x64_sys_munmap+0x59/0x80 [ 30.914368] do_syscall_64+0x3f/0x90 [ 30.914858] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.915556] [ 30.915779] The buggy address belongs to the object at ffff888016e44d98 [ 30.915779] which belongs to the cache vm_area_struct of size 168 [ 30.917291] The buggy address is located 88 bytes inside of [ 30.917291] freed 168-byte region [ffff888016e44d98, ffff888016e44e40) [ 30.918716] [ 30.918939] The buggy address belongs to the physical page: [ 30.919599] page:00000000383e373b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16e44 [ 30.920716] memcg:ffff8880146c2801 [ 30.921161] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.921818] page_type: 0xffffffff() [ 30.922276] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.923218] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880146c2801 [ 30.924138] page dumped because: kasan: bad access detected [ 30.924827] [ 30.925049] Memory state around the buggy address: [ 30.925643] ffff888016e44c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.926509] ffff888016e44d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.927379] >ffff888016e44d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.928248] ^ [ 30.929081] ffff888016e44e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.929971] ffff888016e44e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.930841] ================================================================== [ 30.931810] Disabling lock debugging due to kernel taint [ 33.042110] BUG: Bad rss-counter state mm:000000003b543515 type:MM_FILEPAGES val:33 [ 33.043153] BUG: Bad rss-counter state mm:000000003b543515 type:MM_ANONPAGES val:22 [ 33.496615] BUG: Bad rss-counter state mm:00000000d180f1aa type:MM_FILEPAGES val:33 [ 33.497683] BUG: Bad rss-counter state mm:00000000d180f1aa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50394' (ECDSA) to the list of known hosts. 2023/06/20 23:49:41 fuzzer started 2023/06/20 23:49:42 dialing manager at localhost:36067 2023/06/20 23:49:42 checking machine... 2023/06/20 23:49:42 checking revisions... [ 34.211653] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:49:42 testing simple program... [ 34.255851] cgroup: Unknown subsys name 'net' [ 34.304830] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:49:41 Registers: info registers vcpu 0 RAX=fffff940000b6ca0 RBX=fffff940000b6ca1 RCX=ffffffff817908da RDX=fffff940000b6ca1 RSI=0000000000000008 RDI=ffffea00005b6500 RBP=fffff940000b6ca0 RSP=ffff88800a36f9f0 R8 =0000000000000000 R9 =fffff940000b6ca0 R10=ffffea00005b6507 R11=00000000000d0000 R12=dffffc0000000000 R13=0000000000000000 R14=ffff88800844f780 R15=ffff888016d94980 RIP=ffffffff8180f189 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 00007f01189ff900 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=00007ffe132e7000 CR3=00000000199c0000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f26fca90b60 CR3=000000000ef4a000 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=2031343a39343a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a39343a3332203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000