syzkaller login: [ 32.631284] sshd (212) used greatest stack depth: 24128 bytes left [ 32.632907] BUG: Bad rss-counter state mm:0000000099c3d127 type:MM_FILEPAGES val:33 [ 32.634657] BUG: Bad rss-counter state mm:0000000099c3d127 type:MM_ANONPAGES val:22 [ 32.797149] ================================================================== [ 32.798135] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.799158] Read of size 8 at addr ffff88800f765968 by task sshd/219 [ 32.800053] [ 32.800286] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.801197] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.802237] Call Trace: [ 32.802594] [ 32.802899] dump_stack_lvl+0x91/0xf0 [ 32.803422] print_report+0xcc/0x620 [ 32.803934] ? __virt_addr_valid+0x102/0x340 [ 32.804522] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.805184] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.805835] kasan_report+0xbe/0xf0 [ 32.806346] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.807042] vma_interval_tree_remove+0xc75/0xec0 [ 32.807693] vma_prepare+0xc54/0x11a0 [ 32.808202] __split_vma+0x5af/0x950 [ 32.808710] ? __pfx___split_vma+0x10/0x10 [ 32.809282] ? find_held_lock+0x2c/0x110 [ 32.809842] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.810476] ? lock_is_held_type+0x9f/0x120 [ 32.811063] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.811712] ? mtree_range_walk+0x632/0x900 [ 32.812308] ? mas_walk+0x5c7/0x7c0 [ 32.812823] do_vmi_munmap+0x1f1/0x2b0 [ 32.813356] mmap_region+0x1f9/0x2660 [ 32.813871] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.814429] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.815193] ? __pfx_lock_acquire+0x10/0x10 [ 32.815768] ? __pfx_mmap_region+0x10/0x10 [ 32.816342] ? security_mmap_addr+0x7d/0xa0 [ 32.816913] ? get_unmapped_area+0x1f5/0x3f0 [ 32.817508] do_mmap+0x854/0xf00 [ 32.817991] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.818529] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.819133] ksys_mmap_pgoff+0x3af/0x500 [ 32.819683] do_syscall_64+0x3f/0x90 [ 32.820198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.820896] RIP: 0033:0x7fa297ed5d82 [ 32.821390] 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 [ 32.823698] RSP: 002b:00007ffcc3df4cd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.824663] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa297ed5d82 [ 32.825573] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa29730f000 [ 32.826483] RBP: 00007fa29730f000 R08: 0000000000000009 R09: 0000000000001000 [ 32.827391] R10: 0000000000000812 R11: 0000000000000206 R12: 000055df94baff70 [ 32.828307] R13: 00007ffcc3df4cf0 R14: 00007ffcc3df4d20 R15: 00007ffcc3df5080 [ 32.829222] [ 32.829538] [ 32.829769] Allocated by task 212: [ 32.830223] kasan_save_stack+0x22/0x50 [ 32.830776] kasan_set_track+0x25/0x30 [ 32.831303] __kasan_slab_alloc+0x59/0x70 [ 32.831860] kmem_cache_alloc+0x16b/0x370 [ 32.832411] vm_area_dup+0x20/0x160 [ 32.832892] __split_vma+0x170/0x950 [ 32.833382] split_vma+0xc6/0x110 [ 32.833855] mprotect_fixup+0x8d2/0xb30 [ 32.834410] do_mprotect_pkey+0x87e/0xd40 [ 32.834968] __x64_sys_mprotect+0x78/0xc0 [ 32.835524] do_syscall_64+0x3f/0x90 [ 32.836032] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.836711] [ 32.836941] Freed by task 212: [ 32.837360] kasan_save_stack+0x22/0x50 [ 32.837899] kasan_set_track+0x25/0x30 [ 32.838436] kasan_save_free_info+0x2b/0x50 [ 32.839014] __kasan_slab_free+0x10a/0x190 [ 32.839589] kmem_cache_free+0x10d/0x4d0 [ 32.840148] rcu_core+0x8c8/0x2860 [ 32.840627] __do_softirq+0x1b7/0x7d4 [ 32.841148] [ 32.841376] Last potentially related work creation: [ 32.842001] kasan_save_stack+0x22/0x50 [ 32.842556] __kasan_record_aux_stack+0x8e/0xa0 [ 32.843179] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.843873] remove_vma+0x139/0x170 [ 32.844360] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.844957] do_vmi_munmap+0x1f1/0x2b0 [ 32.845483] __vm_munmap+0x138/0x3a0 [ 32.845985] __x64_sys_munmap+0x59/0x80 [ 32.846523] do_syscall_64+0x3f/0x90 [ 32.847028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.847715] [ 32.847942] The buggy address belongs to the object at ffff88800f765910 [ 32.847942] which belongs to the cache vm_area_struct of size 168 [ 32.849516] The buggy address is located 88 bytes inside of [ 32.849516] freed 168-byte region [ffff88800f765910, ffff88800f7659b8) [ 32.851029] [ 32.851261] The buggy address belongs to the physical page: [ 32.851961] page:00000000138762f3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf765 [ 32.853124] memcg:ffff88800cb13801 [ 32.853587] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.854279] page_type: 0xffffffff() [ 32.854774] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.855762] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb13801 [ 32.856760] page dumped because: kasan: bad access detected [ 32.857463] [ 32.857696] Memory state around the buggy address: [ 32.858326] ffff88800f765800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 32.859250] ffff88800f765880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 32.860175] >ffff88800f765900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.861095] ^ [ 32.861940] ffff88800f765980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.862875] ffff88800f765a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.863785] ================================================================== [ 32.864876] Disabling lock debugging due to kernel taint [ 34.907090] BUG: Bad rss-counter state mm:00000000d60db2e2 type:MM_FILEPAGES val:33 [ 34.908106] BUG: Bad rss-counter state mm:00000000d60db2e2 type:MM_ANONPAGES val:22 [ 35.367913] BUG: Bad rss-counter state mm:00000000910940a0 type:MM_FILEPAGES val:33 [ 35.368949] BUG: Bad rss-counter state mm:00000000910940a0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34120' (ECDSA) to the list of known hosts. 2023/06/19 12:35:20 fuzzer started 2023/06/19 12:35:20 dialing manager at localhost:44161 2023/06/19 12:35:20 checking machine... 2023/06/19 12:35:20 checking revisions... [ 36.141946] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:35:20 testing simple program... [ 36.198628] cgroup: Unknown subsys name 'net' [ 36.239740] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:35:18 Registers: info registers vcpu 0 RAX=1ffff110028c9ef3 RBX=0000000000000003 RCX=0000000000000001 RDX=0000000000092cc0 RSI=000000000000000d RDI=ffff88801464f798 RBP=dffffc0000000000 RSP=ffff88801464f6f0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=000000000000000d R13=0000000000092cc0 R14=ffff88801464f780 R15=0000000000092cc0 RIP=ffffffff813ad5ca 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 00007f397ba95900 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=00007f1cdc61d650 CR3=000000000f0aa000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6c5b15b3b644291900000000000ae988 XMM05=0161773e45d665790000000000135360 XMM06=806171799158d9670000000000134150 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800c63d650 RBX=ffff88800f2e2800 RCX=0000000000000009 RDX=0000000000000001 RSI=0000000000000408 RDI=ffff88800db13380 RBP=ffff88800db13380 RSP=ffff888019fbf880 R8 =0000000000000005 R9 =0000000000000140 R10=00000000000000c0 R11=00000000000b6996 R12=0000000000000408 R13=0000000000000200 R14=ffffffff83677d2f R15=ffff88800db13380 RIP=ffffffff81534320 RFL=00000006 [-----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 00007f304671d700 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=00007fffdf964ab8 CR3=000000000f36e000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732039313a3533 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323236 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000