syzkaller login: [ 31.092343] BUG: Bad rss-counter state mm:0000000026f40b8d type:MM_FILEPAGES val:33 [ 31.093466] BUG: Bad rss-counter state mm:0000000026f40b8d type:MM_ANONPAGES val:22 [ 31.142248] ================================================================== [ 31.143516] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.144907] Read of size 8 at addr ffff88800eb9c4e0 by task sshd/220 [ 31.145839] [ 31.146059] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.146925] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.147923] Call Trace: [ 31.148249] [ 31.148531] dump_stack_lvl+0x91/0xf0 [ 31.149029] print_report+0xcc/0x620 [ 31.149521] ? __virt_addr_valid+0x102/0x340 [ 31.150082] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.150710] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.151352] kasan_report+0xbe/0xf0 [ 31.151844] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.152468] vma_interval_tree_remove+0xc75/0xec0 [ 31.153079] vma_prepare+0xc54/0x11a0 [ 31.153580] __split_vma+0x5af/0x950 [ 31.154069] ? __pfx___split_vma+0x10/0x10 [ 31.154590] ? find_held_lock+0x2c/0x110 [ 31.155132] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.155694] ? lock_is_held_type+0x9f/0x120 [ 31.156250] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.156884] ? mtree_range_walk+0x632/0x900 [ 31.157460] ? mas_walk+0x5c7/0x7c0 [ 31.157958] do_vmi_munmap+0x1f1/0x2b0 [ 31.158450] mmap_region+0x1f9/0x2660 [ 31.158947] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.159456] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.160197] ? __pfx_lock_acquire+0x10/0x10 [ 31.160736] ? __pfx_mmap_region+0x10/0x10 [ 31.161280] ? security_mmap_addr+0x7d/0xa0 [ 31.161860] ? get_unmapped_area+0x1f5/0x3f0 [ 31.162410] do_mmap+0x854/0xf00 [ 31.162866] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.163363] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.163947] ksys_mmap_pgoff+0x3af/0x500 [ 31.164458] do_syscall_64+0x3f/0x90 [ 31.164957] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.165630] RIP: 0033:0x7f3a91cb1d82 [ 31.166100] 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 [ 31.168243] RSP: 002b:00007ffca0f22dc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.169161] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3a91cb1d82 [ 31.170038] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3a910eb000 [ 31.170894] RBP: 00007f3a910eb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.171740] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555a3ac97ec0 [ 31.172596] R13: 00007ffca0f22de0 R14: 00007ffca0f22e10 R15: 00007ffca0f23170 [ 31.173491] [ 31.173799] [ 31.174013] Allocated by task 213: [ 31.174434] kasan_save_stack+0x22/0x50 [ 31.174945] kasan_set_track+0x25/0x30 [ 31.175438] __kasan_slab_alloc+0x59/0x70 [ 31.175978] kmem_cache_alloc+0x16b/0x370 [ 31.176493] vm_area_dup+0x20/0x160 [ 31.176977] __split_vma+0x170/0x950 [ 31.177459] split_vma+0xc6/0x110 [ 31.177913] mprotect_fixup+0x8d2/0xb30 [ 31.178413] do_mprotect_pkey+0x87e/0xd40 [ 31.178942] __x64_sys_mprotect+0x78/0xc0 [ 31.179457] do_syscall_64+0x3f/0x90 [ 31.179945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.180586] [ 31.180818] Freed by task 213: [ 31.181206] kasan_save_stack+0x22/0x50 [ 31.181736] kasan_set_track+0x25/0x30 [ 31.182247] kasan_save_free_info+0x2b/0x50 [ 31.182791] __kasan_slab_free+0x10a/0x190 [ 31.183321] kmem_cache_free+0x10d/0x4d0 [ 31.183846] rcu_core+0x8c8/0x2860 [ 31.184289] __do_softirq+0x1b7/0x7d4 [ 31.184780] [ 31.184999] Last potentially related work creation: [ 31.185595] kasan_save_stack+0x22/0x50 [ 31.186109] __kasan_record_aux_stack+0x8e/0xa0 [ 31.186682] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.187512] remove_vma+0x139/0x170 [ 31.187985] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.188543] do_vmi_munmap+0x1f1/0x2b0 [ 31.189052] __vm_munmap+0x138/0x3a0 [ 31.189542] __x64_sys_munmap+0x59/0x80 [ 31.190050] do_syscall_64+0x3f/0x90 [ 31.190527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.191183] [ 31.191400] Second to last potentially related work creation: [ 31.192097] kasan_save_stack+0x22/0x50 [ 31.192605] __kasan_record_aux_stack+0x8e/0xa0 [ 31.193186] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.193853] remove_vma+0x139/0x170 [ 31.194305] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.194876] do_vmi_munmap+0x1f1/0x2b0 [ 31.195360] mmap_region+0x1f9/0x2660 [ 31.195848] do_mmap+0x854/0xf00 [ 31.196282] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.196786] ksys_mmap_pgoff+0x3af/0x500 [ 31.197287] do_syscall_64+0x3f/0x90 [ 31.197795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.198440] [ 31.198657] The buggy address belongs to the object at ffff88800eb9c488 [ 31.198657] which belongs to the cache vm_area_struct of size 168 [ 31.200137] The buggy address is located 88 bytes inside of [ 31.200137] freed 168-byte region [ffff88800eb9c488, ffff88800eb9c530) [ 31.201566] [ 31.201803] The buggy address belongs to the physical page: [ 31.202484] page:000000000cfa3e52 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb9c [ 31.203588] memcg:ffff88801354c901 [ 31.204030] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.204748] page_type: 0xffffffff() [ 31.205217] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.206159] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801354c901 [ 31.207116] page dumped because: kasan: bad access detected [ 31.207801] [ 31.208017] Memory state around the buggy address: [ 31.208594] ffff88800eb9c380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.209492] ffff88800eb9c400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.210396] >ffff88800eb9c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.211279] ^ [ 31.212043] ffff88800eb9c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.212932] ffff88800eb9c580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.213831] ================================================================== [ 31.214767] Disabling lock debugging due to kernel taint [ 33.373426] BUG: Bad rss-counter state mm:00000000c40528ed type:MM_FILEPAGES val:33 [ 33.374379] BUG: Bad rss-counter state mm:00000000c40528ed type:MM_ANONPAGES val:22 [ 33.842097] BUG: Bad rss-counter state mm:000000008b11766c type:MM_FILEPAGES val:33 [ 33.843153] BUG: Bad rss-counter state mm:000000008b11766c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1459' (ECDSA) to the list of known hosts. 2023/06/20 19:03:06 fuzzer started 2023/06/20 19:03:06 dialing manager at localhost:36067 2023/06/20 19:03:07 checking machine... 2023/06/20 19:03:07 checking revisions... [ 34.538063] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:03:07 testing simple program... [ 34.585989] cgroup: Unknown subsys name 'net' [ 34.622178] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:03:06 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=00007feaea7b5ca0 CR3=000000001a860000 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=2036303a33303a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a33303a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100207ef00 RSI=ffffffff81809a91 RDI=ffff8880103f7784 RBP=ffff8880103f7748 RSP=ffff8880103f76a8 R8 =0000000000000001 R9 =ffff8880103f76f0 R10=0000000000038001 R11=000000000000fc0c R12=ffff8880103f7778 R13=0000000000000000 R14=ffff8880158c9b40 R15=0000000000000000 RIP=ffffffff84538a40 RFL=00000282 [--S----] 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 00007f4c31ed0900 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=00007f4c31e89008 CR3=000000000d408000 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=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