syzkaller login: [ 31.668333] BUG: Bad rss-counter state mm:000000003c183e06 type:MM_FILEPAGES val:33 [ 31.669781] BUG: Bad rss-counter state mm:000000003c183e06 type:MM_ANONPAGES val:22 [ 31.820675] ================================================================== [ 31.821824] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.822995] Read of size 8 at addr ffff888009499c20 by task sshd/220 [ 31.823881] [ 31.824106] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.825013] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.826058] Call Trace: [ 31.826398] [ 31.826692] dump_stack_lvl+0x91/0xf0 [ 31.827207] print_report+0xcc/0x620 [ 31.827713] ? __virt_addr_valid+0x102/0x340 [ 31.828273] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.828905] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.829525] kasan_report+0xbe/0xf0 [ 31.830035] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.830683] vma_interval_tree_remove+0xc75/0xec0 [ 31.831331] vma_prepare+0xc54/0x11a0 [ 31.831831] __split_vma+0x5af/0x950 [ 31.832329] ? __pfx___split_vma+0x10/0x10 [ 31.832885] ? find_held_lock+0x2c/0x110 [ 31.833438] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.834037] ? lock_is_held_type+0x9f/0x120 [ 31.834609] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.835243] ? mtree_range_walk+0x632/0x900 [ 31.835883] ? mas_walk+0x5c7/0x7c0 [ 31.836389] do_vmi_munmap+0x1f1/0x2b0 [ 31.836925] mmap_region+0x1f9/0x2660 [ 31.837439] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.837994] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.838741] ? __pfx_lock_acquire+0x10/0x10 [ 31.839310] ? __pfx_mmap_region+0x10/0x10 [ 31.839868] ? security_mmap_addr+0x7d/0xa0 [ 31.840427] ? get_unmapped_area+0x1f5/0x3f0 [ 31.841002] do_mmap+0x854/0xf00 [ 31.841467] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.842010] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.842595] ksys_mmap_pgoff+0x3af/0x500 [ 31.843127] do_syscall_64+0x3f/0x90 [ 31.843640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.844326] RIP: 0033:0x7f0e85d2cd82 [ 31.844821] 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 [ 31.847105] RSP: 002b:00007ffcefe352a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.848059] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0e85d2cd82 [ 31.848954] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0e85166000 [ 31.849828] RBP: 00007f0e85166000 R08: 0000000000000009 R09: 0000000000001000 [ 31.850735] R10: 0000000000000812 R11: 0000000000000206 R12: 000056076b136d90 [ 31.851627] R13: 00007ffcefe352c0 R14: 00007ffcefe352f0 R15: 00007ffcefe35650 [ 31.852539] [ 31.852853] [ 31.853082] Allocated by task 213: [ 31.853536] kasan_save_stack+0x22/0x50 [ 31.854075] kasan_set_track+0x25/0x30 [ 31.854597] __kasan_slab_alloc+0x59/0x70 [ 31.855159] kmem_cache_alloc+0x16b/0x370 [ 31.855706] vm_area_dup+0x20/0x160 [ 31.856191] __split_vma+0x170/0x950 [ 31.856676] split_vma+0xc6/0x110 [ 31.857140] mprotect_fixup+0x8d2/0xb30 [ 31.857662] do_mprotect_pkey+0x87e/0xd40 [ 31.858225] __x64_sys_mprotect+0x78/0xc0 [ 31.858778] do_syscall_64+0x3f/0x90 [ 31.859275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.859943] [ 31.860169] Freed by task 213: [ 31.860581] kasan_save_stack+0x22/0x50 [ 31.861111] kasan_set_track+0x25/0x30 [ 31.861636] kasan_save_free_info+0x2b/0x50 [ 31.862210] __kasan_slab_free+0x10a/0x190 [ 31.862766] kmem_cache_free+0x10d/0x4d0 [ 31.863304] rcu_core+0x8c8/0x2860 [ 31.863773] __do_softirq+0x1b7/0x7d4 [ 31.864280] [ 31.864502] Last potentially related work creation: [ 31.865115] kasan_save_stack+0x22/0x50 [ 31.865655] __kasan_record_aux_stack+0x8e/0xa0 [ 31.866270] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.866966] remove_vma+0x139/0x170 [ 31.867435] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.868033] do_vmi_munmap+0x1f1/0x2b0 [ 31.868550] __vm_munmap+0x138/0x3a0 [ 31.869045] __x64_sys_munmap+0x59/0x80 [ 31.869565] do_syscall_64+0x3f/0x90 [ 31.870079] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.870751] [ 31.870977] The buggy address belongs to the object at ffff888009499bc8 [ 31.870977] which belongs to the cache vm_area_struct of size 168 [ 31.872544] The buggy address is located 88 bytes inside of [ 31.872544] freed 168-byte region [ffff888009499bc8, ffff888009499c70) [ 31.874046] [ 31.874275] The buggy address belongs to the physical page: [ 31.874963] page:000000009c903f3c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9499 [ 31.876122] memcg:ffff88800fee8501 [ 31.876572] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.877309] page_type: 0xffffffff() [ 31.877783] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 31.878767] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fee8501 [ 31.879722] page dumped because: kasan: bad access detected [ 31.880421] [ 31.880647] Memory state around the buggy address: [ 31.881263] ffff888009499b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.882185] ffff888009499b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.883094] >ffff888009499c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.883970] ^ [ 31.884497] ffff888009499c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.885357] ffff888009499d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.886224] ================================================================== [ 31.887204] Disabling lock debugging due to kernel taint [ 33.830471] BUG: Bad rss-counter state mm:00000000501225ad type:MM_FILEPAGES val:33 [ 33.831641] BUG: Bad rss-counter state mm:00000000501225ad type:MM_ANONPAGES val:22 [ 34.202921] BUG: Bad rss-counter state mm:00000000aeaf10d3 type:MM_FILEPAGES val:33 [ 34.203687] BUG: Bad rss-counter state mm:00000000aeaf10d3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10873' (ECDSA) to the list of known hosts. 2023/06/19 18:47:27 fuzzer started 2023/06/19 18:47:28 dialing manager at localhost:44161 2023/06/19 18:47:28 checking machine... 2023/06/19 18:47:28 checking revisions... [ 34.939412] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:47:28 testing simple program... [ 34.982973] cgroup: Unknown subsys name 'net' [ 35.022390] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:47:27 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f6a8e81c020 CR3=000000000c796000 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=6abf345d7e0b628d3241baa6c00c2c61 XMM02=000000000011d918ec2efd57dc4c00df XMM03=0000000000124620a759cdf3a50b880c XMM04=cefdb16c9ead77b300000000000ae988 XMM05=19e9129bd510f23500000000001341b0 XMM06=d76144a3190d4f1f0000000000133018 XMM07=e042d86d42eb936e00000000001248a0 XMM08=a759cdf3a50b880c000000000011d978 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001c4a543 RBX=ffff88800e2529e8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e252a20 RBP=ffff888018e5b188 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff888018e6c540 R14=ffffffff818d9dc6 R15=ffff888008f3c880 RIP=ffffffff81846375 RFL=00000087 [--S--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 00007f22f5fea900 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=00007ffe4f884000 CR3=000000001a30a000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000