syzkaller login: [ 30.795106] BUG: Bad rss-counter state mm:000000005a6057c9 type:MM_FILEPAGES val:33 [ 30.796276] BUG: Bad rss-counter state mm:000000005a6057c9 type:MM_ANONPAGES val:22 [ 30.834830] ================================================================== [ 30.835867] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.836867] Read of size 8 at addr ffff88801a1165c8 by task sshd/220 [ 30.837654] [ 30.837874] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.838773] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.839799] Call Trace: [ 30.840121] [ 30.840485] dump_stack_lvl+0x91/0xf0 [ 30.841032] print_report+0xcc/0x620 [ 30.841547] ? __virt_addr_valid+0x102/0x340 [ 30.842123] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.842843] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.843503] kasan_report+0xbe/0xf0 [ 30.844021] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.844816] vma_interval_tree_remove+0xc75/0xec0 [ 30.845502] vma_prepare+0xc54/0x11a0 [ 30.846072] __split_vma+0x5af/0x950 [ 30.846625] ? __pfx___split_vma+0x10/0x10 [ 30.847207] ? find_held_lock+0x2c/0x110 [ 30.847878] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.848547] ? lock_is_held_type+0x9f/0x120 [ 30.849128] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.849981] ? mtree_range_walk+0x632/0x900 [ 30.850762] ? mas_walk+0x5c7/0x7c0 [ 30.851421] do_vmi_munmap+0x1f1/0x2b0 [ 30.852097] mmap_region+0x1f9/0x2660 [ 30.852663] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.853247] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.854152] ? __pfx_lock_acquire+0x10/0x10 [ 30.854748] ? __pfx_mmap_region+0x10/0x10 [ 30.855345] ? security_mmap_addr+0x7d/0xa0 [ 30.855911] ? get_unmapped_area+0x1f5/0x3f0 [ 30.856530] do_mmap+0x854/0xf00 [ 30.856977] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.857592] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.858165] ksys_mmap_pgoff+0x3af/0x500 [ 30.858722] do_syscall_64+0x3f/0x90 [ 30.859273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.859966] RIP: 0033:0x7fa08fffad82 [ 30.860448] 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 [ 30.862788] RSP: 002b:00007fff296edd18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.863755] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa08fffad82 [ 30.864726] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa08f434000 [ 30.865618] RBP: 00007fa08f434000 R08: 0000000000000009 R09: 0000000000001000 [ 30.866482] R10: 0000000000000812 R11: 0000000000000206 R12: 00005636f3d9dec0 [ 30.867346] R13: 00007fff296edd30 R14: 00007fff296edd60 R15: 00007fff296ee0c0 [ 30.868219] [ 30.868572] [ 30.868807] Allocated by task 213: [ 30.869288] kasan_save_stack+0x22/0x50 [ 30.869824] kasan_set_track+0x25/0x30 [ 30.870318] __kasan_slab_alloc+0x59/0x70 [ 30.871012] kmem_cache_alloc+0x16b/0x370 [ 30.871571] vm_area_dup+0x20/0x160 [ 30.872064] __split_vma+0x170/0x950 [ 30.872612] split_vma+0xc6/0x110 [ 30.873093] mprotect_fixup+0x8d2/0xb30 [ 30.873610] do_mprotect_pkey+0x87e/0xd40 [ 30.874158] __x64_sys_mprotect+0x78/0xc0 [ 30.874769] do_syscall_64+0x3f/0x90 [ 30.875281] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.875955] [ 30.876236] Freed by task 213: [ 30.876659] kasan_save_stack+0x22/0x50 [ 30.877174] kasan_set_track+0x25/0x30 [ 30.877690] kasan_save_free_info+0x2b/0x50 [ 30.878229] __kasan_slab_free+0x10a/0x190 [ 30.878806] kmem_cache_free+0x10d/0x4d0 [ 30.879323] rcu_core+0x8c8/0x2860 [ 30.879787] __do_softirq+0x1b7/0x7d4 [ 30.880304] [ 30.880624] Last potentially related work creation: [ 30.881227] kasan_save_stack+0x22/0x50 [ 30.881772] __kasan_record_aux_stack+0x8e/0xa0 [ 30.882355] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.883066] remove_vma+0x139/0x170 [ 30.883555] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.884117] do_vmi_munmap+0x1f1/0x2b0 [ 30.884708] __vm_munmap+0x138/0x3a0 [ 30.885171] __x64_sys_munmap+0x59/0x80 [ 30.885700] do_syscall_64+0x3f/0x90 [ 30.886232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.886936] [ 30.887152] The buggy address belongs to the object at ffff88801a116570 [ 30.887152] which belongs to the cache vm_area_struct of size 168 [ 30.888747] The buggy address is located 88 bytes inside of [ 30.888747] freed 168-byte region [ffff88801a116570, ffff88801a116618) [ 30.890275] [ 30.890508] The buggy address belongs to the physical page: [ 30.891166] page:00000000817a22f1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a116 [ 30.892386] memcg:ffff88800b931701 [ 30.892851] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.893575] page_type: 0xffffffff() [ 30.894032] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.894970] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b931701 [ 30.895982] page dumped because: kasan: bad access detected [ 30.896698] [ 30.896972] Memory state around the buggy address: [ 30.897604] ffff88801a116480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.898491] ffff88801a116500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.899433] >ffff88801a116580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.900324] ^ [ 30.901098] ffff88801a116600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.901979] ffff88801a116680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.902925] ================================================================== [ 30.904105] Disabling lock debugging due to kernel taint [ 33.145434] BUG: Bad rss-counter state mm:0000000094491aef type:MM_FILEPAGES val:33 [ 33.146314] BUG: Bad rss-counter state mm:0000000094491aef type:MM_ANONPAGES val:22 [ 33.642677] BUG: Bad rss-counter state mm:000000000dffa507 type:MM_FILEPAGES val:33 [ 33.643633] BUG: Bad rss-counter state mm:000000000dffa507 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58479' (ECDSA) to the list of known hosts. 2023/06/20 11:50:57 fuzzer started 2023/06/20 11:50:57 dialing manager at localhost:36067 2023/06/20 11:50:57 checking machine... 2023/06/20 11:50:57 checking revisions... [ 34.368443] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:50:57 testing simple program... [ 34.424231] cgroup: Unknown subsys name 'net' [ 34.468174] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:50:57 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fff86975a18 CR3=000000000df48000 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=2036353a30353a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a30353a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff83636c67 RBX=ffffffff85fa4c04 RCX=ffffffff83636c05 RDX=0000000000000000 RSI=ffffffff863b3050 RDI=ffffffff85fa4bf4 RBP=ffffffff85fa4bf4 RSP=ffff888016e77258 R8 =ffffffff863b3050 R9 =ffff888016e77350 R10=0000000000038001 R11=000000000008a88c R12=ffffffff85fa4c00 R13=ffffffff85fa4bf4 R14=ffffffff85fa4bf4 R15=dffffc0000000000 RIP=ffffffff8112fc9f 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 00007fe69ff09900 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=00007ffdb18cc000 CR3=000000000f278000 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=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000