syzkaller login: [ 38.668703] BUG: Bad rss-counter state mm:00000000f688e000 type:MM_FILEPAGES val:33 [ 38.670145] BUG: Bad rss-counter state mm:00000000f688e000 type:MM_ANONPAGES val:22 [ 38.822644] ================================================================== [ 38.823554] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.824500] Read of size 8 at addr ffff888009877df0 by task sshd/219 [ 38.825315] [ 38.825536] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.826474] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.827455] Call Trace: [ 38.827795] [ 38.828080] dump_stack_lvl+0x91/0xf0 [ 38.828572] print_report+0xcc/0x620 [ 38.829065] ? __virt_addr_valid+0x102/0x340 [ 38.829624] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.830253] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.830881] kasan_report+0xbe/0xf0 [ 38.831355] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.831977] vma_interval_tree_remove+0xc75/0xec0 [ 38.832582] vma_prepare+0xc54/0x11a0 [ 38.833070] __split_vma+0x5af/0x950 [ 38.833539] ? __pfx___split_vma+0x10/0x10 [ 38.834074] ? find_held_lock+0x2c/0x110 [ 38.834594] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.835156] ? lock_is_held_type+0x9f/0x120 [ 38.835693] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.836298] ? mtree_range_walk+0x632/0x900 [ 38.836853] ? mas_walk+0x5c7/0x7c0 [ 38.837329] do_vmi_munmap+0x1f1/0x2b0 [ 38.837852] mmap_region+0x1f9/0x2660 [ 38.838342] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.838859] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.839581] ? __pfx_lock_acquire+0x10/0x10 [ 38.840112] ? __pfx_mmap_region+0x10/0x10 [ 38.840641] ? security_mmap_addr+0x7d/0xa0 [ 38.841174] ? get_unmapped_area+0x1f5/0x3f0 [ 38.841741] do_mmap+0x854/0xf00 [ 38.842180] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.842680] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.843245] ksys_mmap_pgoff+0x3af/0x500 [ 38.843756] do_syscall_64+0x3f/0x90 [ 38.844235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.844886] RIP: 0033:0x7fa18d60bd82 [ 38.845344] 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 [ 38.847464] RSP: 002b:00007ffd694299f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.848367] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa18d60bd82 [ 38.849217] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa18ca45000 [ 38.850082] RBP: 00007fa18ca45000 R08: 0000000000000009 R09: 0000000000001000 [ 38.850926] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f8a891b20 [ 38.851764] R13: 00007ffd69429a10 R14: 00007ffd69429a40 R15: 00007ffd69429da0 [ 38.852618] [ 38.852911] [ 38.853127] Allocated by task 212: [ 38.853550] kasan_save_stack+0x22/0x50 [ 38.854058] kasan_set_track+0x25/0x30 [ 38.854552] __kasan_slab_alloc+0x59/0x70 [ 38.855071] kmem_cache_alloc+0x16b/0x370 [ 38.855579] vm_area_dup+0x20/0x160 [ 38.856032] __split_vma+0x170/0x950 [ 38.856507] split_vma+0xc6/0x110 [ 38.856953] mprotect_fixup+0x8d2/0xb30 [ 38.857457] do_mprotect_pkey+0x87e/0xd40 [ 38.857980] __x64_sys_mprotect+0x78/0xc0 [ 38.858505] do_syscall_64+0x3f/0x90 [ 38.858989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.859628] [ 38.859842] Freed by task 212: [ 38.860235] kasan_save_stack+0x22/0x50 [ 38.860736] kasan_set_track+0x25/0x30 [ 38.861224] kasan_save_free_info+0x2b/0x50 [ 38.861770] __kasan_slab_free+0x10a/0x190 [ 38.862312] kmem_cache_free+0x10d/0x4d0 [ 38.862829] rcu_core+0x8c8/0x2860 [ 38.863276] __do_softirq+0x1b7/0x7d4 [ 38.863755] [ 38.863969] Last potentially related work creation: [ 38.864552] kasan_save_stack+0x22/0x50 [ 38.865055] __kasan_record_aux_stack+0x8e/0xa0 [ 38.865624] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.866313] remove_vma+0x139/0x170 [ 38.866791] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.867370] do_vmi_munmap+0x1f1/0x2b0 [ 38.867878] __vm_munmap+0x138/0x3a0 [ 38.868368] __x64_sys_munmap+0x59/0x80 [ 38.868887] do_syscall_64+0x3f/0x90 [ 38.869396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.870084] [ 38.870310] Second to last potentially related work creation: [ 38.871034] kasan_save_stack+0x22/0x50 [ 38.871561] __kasan_record_aux_stack+0x8e/0xa0 [ 38.872167] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.872842] remove_vma+0x139/0x170 [ 38.873311] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.873919] do_vmi_munmap+0x1f1/0x2b0 [ 38.874426] mmap_region+0x1f9/0x2660 [ 38.874929] do_mmap+0x854/0xf00 [ 38.875372] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.875893] ksys_mmap_pgoff+0x3af/0x500 [ 38.876415] do_syscall_64+0x3f/0x90 [ 38.876913] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.877582] [ 38.877813] The buggy address belongs to the object at ffff888009877d98 [ 38.877813] which belongs to the cache vm_area_struct of size 168 [ 38.879360] The buggy address is located 88 bytes inside of [ 38.879360] freed 168-byte region [ffff888009877d98, ffff888009877e40) [ 38.880843] [ 38.881071] The buggy address belongs to the physical page: [ 38.881783] page:0000000031606d99 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9877 [ 38.882916] memcg:ffff88800e12f001 [ 38.883368] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.884111] page_type: 0xffffffff() [ 38.884586] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.885560] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e12f001 [ 38.886521] page dumped because: kasan: bad access detected [ 38.887214] [ 38.887437] Memory state around the buggy address: [ 38.888038] ffff888009877c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.888950] ffff888009877d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.889853] >ffff888009877d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.890747] ^ [ 38.891606] ffff888009877e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.892491] ffff888009877e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.893381] ================================================================== [ 38.894565] Disabling lock debugging due to kernel taint [ 40.749212] BUG: Bad rss-counter state mm:000000009440bcea type:MM_FILEPAGES val:33 [ 40.749965] BUG: Bad rss-counter state mm:000000009440bcea type:MM_ANONPAGES val:22 [ 41.189934] BUG: Bad rss-counter state mm:00000000d1a2723a type:MM_FILEPAGES val:33 [ 41.190908] BUG: Bad rss-counter state mm:00000000d1a2723a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9513' (ECDSA) to the list of known hosts. 2023/06/21 02:12:42 fuzzer started 2023/06/21 02:12:42 dialing manager at localhost:36067 2023/06/21 02:12:42 checking machine... 2023/06/21 02:12:42 checking revisions... [ 41.941546] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:12:42 testing simple program... [ 41.985552] cgroup: Unknown subsys name 'net' [ 42.026653] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:12:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff844c6e20 RDX=ffff88800ffe51c0 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff8880163f7ca8 RSP=ffff8880163f7aa8 R8 =0000000000000007 R9 =0000000000000002 R10=0000000000000000 R11=0000000000000000 R12=ffff88800e9b09f8 R13=ffffed1002c7ef9c R14=ffff8880163f7ce1 R15=0000000000000000 RIP=ffffffff814c02c5 RFL=00000293 [--S-A-C] 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 00007f763343f900 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=00007f763341e020 CR3=00000000096bc000 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=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=00007f12c105aa40 CR3=000000001a8fe000 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=32313a3230203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303339 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000