syzkaller login: [ 30.711994] BUG: Bad rss-counter state mm:0000000055db8a03 type:MM_FILEPAGES val:33 [ 30.713919] BUG: Bad rss-counter state mm:0000000055db8a03 type:MM_ANONPAGES val:22 [ 30.882690] ================================================================== [ 30.883673] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.884674] Read of size 8 at addr ffff88801036b058 by task sshd/219 [ 30.885517] [ 30.885845] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.886841] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.887928] Call Trace: [ 30.888314] [ 30.888628] dump_stack_lvl+0x91/0xf0 [ 30.889182] print_report+0xcc/0x620 [ 30.889717] ? __virt_addr_valid+0x102/0x340 [ 30.890317] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.890993] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.891684] kasan_report+0xbe/0xf0 [ 30.892204] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.892876] vma_interval_tree_remove+0xc75/0xec0 [ 30.893542] vma_prepare+0xc54/0x11a0 [ 30.894060] __split_vma+0x5af/0x950 [ 30.894569] ? __pfx___split_vma+0x10/0x10 [ 30.895145] ? find_held_lock+0x2c/0x110 [ 30.895706] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.896331] ? lock_is_held_type+0x9f/0x120 [ 30.896934] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.897659] ? mtree_range_walk+0x632/0x900 [ 30.898281] ? mas_walk+0x5c7/0x7c0 [ 30.898792] do_vmi_munmap+0x1f1/0x2b0 [ 30.899324] mmap_region+0x1f9/0x2660 [ 30.899847] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.900397] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.901185] ? __pfx_lock_acquire+0x10/0x10 [ 30.901755] ? __pfx_mmap_region+0x10/0x10 [ 30.902330] ? security_mmap_addr+0x7d/0xa0 [ 30.902902] ? get_unmapped_area+0x1f5/0x3f0 [ 30.903494] do_mmap+0x854/0xf00 [ 30.903972] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.904505] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.905112] ksys_mmap_pgoff+0x3af/0x500 [ 30.905679] do_syscall_64+0x3f/0x90 [ 30.906201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.906901] RIP: 0033:0x7f91fed23d82 [ 30.907393] 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 [ 30.909700] RSP: 002b:00007ffed8157478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.910676] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f91fed23d82 [ 30.911590] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f91fe15d000 [ 30.912507] RBP: 00007f91fe15d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.913598] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d99f871b20 [ 30.914665] R13: 00007ffed8157490 R14: 00007ffed81574c0 R15: 00007ffed8157820 [ 30.915718] [ 30.916078] [ 30.916351] Allocated by task 212: [ 30.916881] kasan_save_stack+0x22/0x50 [ 30.917563] kasan_set_track+0x25/0x30 [ 30.918196] __kasan_slab_alloc+0x59/0x70 [ 30.918829] kmem_cache_alloc+0x16b/0x370 [ 30.919482] vm_area_dup+0x20/0x160 [ 30.920028] __split_vma+0x170/0x950 [ 30.920614] split_vma+0xc6/0x110 [ 30.921167] mprotect_fixup+0x8d2/0xb30 [ 30.921776] do_mprotect_pkey+0x87e/0xd40 [ 30.922439] __x64_sys_mprotect+0x78/0xc0 [ 30.923061] do_syscall_64+0x3f/0x90 [ 30.923658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.924445] [ 30.924705] Freed by task 212: [ 30.925205] kasan_save_stack+0x22/0x50 [ 30.925807] kasan_set_track+0x25/0x30 [ 30.926429] kasan_save_free_info+0x2b/0x50 [ 30.927090] __kasan_slab_free+0x10a/0x190 [ 30.927842] kmem_cache_free+0x10d/0x4d0 [ 30.928401] rcu_core+0x8c8/0x2860 [ 30.928852] __do_softirq+0x1b7/0x7d4 [ 30.929362] [ 30.929581] Last potentially related work creation: [ 30.930201] kasan_save_stack+0x22/0x50 [ 30.930708] __kasan_record_aux_stack+0x8e/0xa0 [ 30.931301] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.931960] remove_vma+0x139/0x170 [ 30.932440] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.933005] do_vmi_munmap+0x1f1/0x2b0 [ 30.933528] __vm_munmap+0x138/0x3a0 [ 30.934001] __x64_sys_munmap+0x59/0x80 [ 30.934528] do_syscall_64+0x3f/0x90 [ 30.935016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.935694] [ 30.935916] The buggy address belongs to the object at ffff88801036b000 [ 30.935916] which belongs to the cache vm_area_struct of size 168 [ 30.937451] The buggy address is located 88 bytes inside of [ 30.937451] freed 168-byte region [ffff88801036b000, ffff88801036b0a8) [ 30.938903] [ 30.939134] The buggy address belongs to the physical page: [ 30.939814] page:0000000088673d4e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1036b [ 30.940953] memcg:ffff88800ead9301 [ 30.941456] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.942135] page_type: 0xffffffff() [ 30.942606] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.943558] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ead9301 [ 30.944492] page dumped because: kasan: bad access detected [ 30.945200] [ 30.945422] Memory state around the buggy address: [ 30.946022] ffff88801036af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.946916] ffff88801036af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.947800] >ffff88801036b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.948708] ^ [ 30.949519] ffff88801036b080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.950428] ffff88801036b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.951311] ================================================================== [ 30.952440] Disabling lock debugging due to kernel taint [ 33.530414] BUG: Bad rss-counter state mm:00000000284dcad0 type:MM_FILEPAGES val:33 [ 33.531180] BUG: Bad rss-counter state mm:00000000284dcad0 type:MM_ANONPAGES val:22 [ 34.000293] BUG: Bad rss-counter state mm:0000000023453f53 type:MM_FILEPAGES val:33 [ 34.001068] BUG: Bad rss-counter state mm:0000000023453f53 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6637' (ECDSA) to the list of known hosts. 2023/06/20 11:34:29 fuzzer started 2023/06/20 11:34:30 dialing manager at localhost:36067 2023/06/20 11:34:30 checking machine... 2023/06/20 11:34:30 checking revisions... [ 34.670577] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:34:30 testing simple program... [ 34.720024] cgroup: Unknown subsys name 'net' [ 34.770308] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:34:29 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880142efcc8 RCX=ffffffff86138e8c RDX=1ffff1100285df30 RSI=0000000000000000 RDI=ffff8880142ef980 RBP=ffff8880142ef9d0 RSP=ffff8880142ef908 R8 =ffffffff86138e90 R9 =ffff8880142ef9b8 R10=0000000000038001 R11=0000000000020d8f R12=ffff8880142ef9d8 R13=ffff8880142ef9c0 R14=ffff8880142efcc8 R15=ffff8880142ef978 RIP=ffffffff81131c83 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 00007f18582ee900 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=00007ffdeaa12000 CR3=000000000ce8a000 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=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 info registers vcpu 1 RAX=0000000080010001 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888008d951c0 RSI=00000007e339ff40 RDI=7fffffffffffffff RBP=00000007e339ff40 RSP=ffff88806cf09f18 R8 =0000000000000000 R9 =ffffed100d9e5728 R10=ffff88806cf2b943 R11=ffff88806cf09ff8 R12=ffff88806cf28140 R13=ffff88806cf2b98c R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff813fa1d9 RFL=00000046 [---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 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=00007f3549e98490 CR3=0000000009806000 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=2039323a34333a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a34333a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000