syzkaller login: [ 30.557146] BUG: Bad rss-counter state mm:0000000065b63e39 type:MM_FILEPAGES val:33 [ 30.558985] BUG: Bad rss-counter state mm:0000000065b63e39 type:MM_ANONPAGES val:22 [ 30.763699] ================================================================== [ 30.764694] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.765747] Read of size 8 at addr ffff888018f68968 by task sshd/220 [ 30.766739] [ 30.766978] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.767916] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.769063] Call Trace: [ 30.769428] [ 30.769776] dump_stack_lvl+0x91/0xf0 [ 30.770321] print_report+0xcc/0x620 [ 30.770861] ? __virt_addr_valid+0x102/0x340 [ 30.771564] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.772357] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.773123] kasan_report+0xbe/0xf0 [ 30.773727] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.774544] vma_interval_tree_remove+0xc75/0xec0 [ 30.775330] vma_prepare+0xc54/0x11a0 [ 30.775941] __split_vma+0x5af/0x950 [ 30.776576] ? __pfx___split_vma+0x10/0x10 [ 30.777272] ? find_held_lock+0x2c/0x110 [ 30.777944] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.778689] ? lock_is_held_type+0x9f/0x120 [ 30.779453] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.780310] ? mtree_range_walk+0x632/0x900 [ 30.781071] ? mas_walk+0x5c7/0x7c0 [ 30.781757] do_vmi_munmap+0x1f1/0x2b0 [ 30.782445] mmap_region+0x1f9/0x2660 [ 30.783043] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.783658] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.784519] ? __pfx_lock_acquire+0x10/0x10 [ 30.785159] ? __pfx_mmap_region+0x10/0x10 [ 30.785796] ? security_mmap_addr+0x7d/0xa0 [ 30.786436] ? get_unmapped_area+0x1f5/0x3f0 [ 30.787091] do_mmap+0x854/0xf00 [ 30.787610] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.788210] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.788838] ksys_mmap_pgoff+0x3af/0x500 [ 30.789412] do_syscall_64+0x3f/0x90 [ 30.789964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.790690] RIP: 0033:0x7f3c3c836d82 [ 30.791213] 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 [ 30.793629] RSP: 002b:00007ffdda8f4888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.794644] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c3c836d82 [ 30.795600] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c3bc70000 [ 30.796624] RBP: 00007f3c3bc70000 R08: 0000000000000009 R09: 0000000000001000 [ 30.797693] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b5838ff70 [ 30.798709] R13: 00007ffdda8f48a0 R14: 00007ffdda8f48d0 R15: 00007ffdda8f4c30 [ 30.799724] [ 30.800074] [ 30.800344] Allocated by task 213: [ 30.800838] kasan_save_stack+0x22/0x50 [ 30.801452] kasan_set_track+0x25/0x30 [ 30.802040] __kasan_slab_alloc+0x59/0x70 [ 30.802654] kmem_cache_alloc+0x16b/0x370 [ 30.803268] vm_area_dup+0x20/0x160 [ 30.803787] __split_vma+0x170/0x950 [ 30.804358] split_vma+0xc6/0x110 [ 30.804870] mprotect_fixup+0x8d2/0xb30 [ 30.805466] do_mprotect_pkey+0x87e/0xd40 [ 30.806105] __x64_sys_mprotect+0x78/0xc0 [ 30.806709] do_syscall_64+0x3f/0x90 [ 30.807292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.808038] [ 30.808313] Freed by task 213: [ 30.808766] kasan_save_stack+0x22/0x50 [ 30.809386] kasan_set_track+0x25/0x30 [ 30.809989] kasan_save_free_info+0x2b/0x50 [ 30.810618] __kasan_slab_free+0x10a/0x190 [ 30.811259] kmem_cache_free+0x10d/0x4d0 [ 30.811847] rcu_core+0x8c8/0x2860 [ 30.812404] __do_softirq+0x1b7/0x7d4 [ 30.812959] [ 30.813228] Last potentially related work creation: [ 30.813927] kasan_save_stack+0x22/0x50 [ 30.814533] __kasan_record_aux_stack+0x8e/0xa0 [ 30.815221] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.815970] remove_vma+0x139/0x170 [ 30.816533] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.817211] do_vmi_munmap+0x1f1/0x2b0 [ 30.817802] __vm_munmap+0x138/0x3a0 [ 30.818363] __x64_sys_munmap+0x59/0x80 [ 30.818941] do_syscall_64+0x3f/0x90 [ 30.819500] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.820320] [ 30.820654] The buggy address belongs to the object at ffff888018f68910 [ 30.820654] which belongs to the cache vm_area_struct of size 168 [ 30.822925] The buggy address is located 88 bytes inside of [ 30.822925] freed 168-byte region [ffff888018f68910, ffff888018f689b8) [ 30.825057] [ 30.825388] The buggy address belongs to the physical page: [ 30.826430] page:0000000099b6e930 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f68 [ 30.827745] memcg:ffff888015abb301 [ 30.828260] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.829008] page_type: 0xffffffff() [ 30.829551] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.830649] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015abb301 [ 30.831742] page dumped because: kasan: bad access detected [ 30.832527] [ 30.832779] Memory state around the buggy address: [ 30.833472] ffff888018f68800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.834510] ffff888018f68880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.835534] >ffff888018f68900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.836530] ^ [ 30.837449] ffff888018f68980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.838502] ffff888018f68a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.839522] ================================================================== [ 30.840980] Disabling lock debugging due to kernel taint [ 33.178764] BUG: Bad rss-counter state mm:0000000006a5e869 type:MM_FILEPAGES val:33 [ 33.180093] BUG: Bad rss-counter state mm:0000000006a5e869 type:MM_ANONPAGES val:22 [ 33.564981] BUG: Bad rss-counter state mm:000000002a94c8f2 type:MM_FILEPAGES val:33 [ 33.566180] BUG: Bad rss-counter state mm:000000002a94c8f2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13251' (ECDSA) to the list of known hosts. 2023/06/21 05:06:48 fuzzer started 2023/06/21 05:06:48 dialing manager at localhost:36067 2023/06/21 05:06:48 checking machine... 2023/06/21 05:06:48 checking revisions... [ 34.260822] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:06:48 testing simple program... [ 34.309316] cgroup: Unknown subsys name 'net' [ 34.373647] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:06:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000055c3ed89b398 RCX=00000000000000e5 RDX=0000000000000001 RSI=0000000000000000 RDI=00007f1ceda90968 RBP=000055c3ed8b4640 RSP=00007ffd8ea49100 R8 =000055c3ed8b4640 R9 =00007ffd8ea42678 R10=000055c3ed8bd0b0 R11=0000000000000246 R12=0000000000000000 R13=0000000000000000 R14=00007ffd8ea49690 R15=00007ffd8ea49440 RIP=00007f1ced2a8851 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1ceceee900 00000000 00000000 GS =0000 0000000000000000 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=00007f1ceda90968 CR3=000000000fdac000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007f4fb2fbb000 CR3=000000000d66c000 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=2038343a36303a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a36303a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000