syzkaller login: [ 32.770356] BUG: Bad rss-counter state mm:000000003047f447 type:MM_FILEPAGES val:33 [ 32.771789] BUG: Bad rss-counter state mm:000000003047f447 type:MM_ANONPAGES val:22 [ 32.915235] ================================================================== [ 32.916341] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.917493] Read of size 8 at addr ffff88800eb41df0 by task sshd/221 [ 32.918394] [ 32.918649] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.919672] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.920835] Call Trace: [ 32.921168] [ 32.921437] dump_stack_lvl+0x91/0xf0 [ 32.921905] print_report+0xcc/0x620 [ 32.922361] ? __virt_addr_valid+0x102/0x340 [ 32.922881] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.923466] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.924043] kasan_report+0xbe/0xf0 [ 32.924516] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.925107] vma_interval_tree_remove+0xc75/0xec0 [ 32.925675] vma_prepare+0xc54/0x11a0 [ 32.926126] __split_vma+0x5af/0x950 [ 32.926576] ? __pfx___split_vma+0x10/0x10 [ 32.927078] ? find_held_lock+0x2c/0x110 [ 32.927682] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.928240] ? lock_is_held_type+0x9f/0x120 [ 32.928770] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.929368] ? mtree_range_walk+0x632/0x900 [ 32.929912] ? mas_walk+0x5c7/0x7c0 [ 32.930376] do_vmi_munmap+0x1f1/0x2b0 [ 32.930855] mmap_region+0x1f9/0x2660 [ 32.931338] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.931841] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.932586] ? __pfx_lock_acquire+0x10/0x10 [ 32.933113] ? __pfx_mmap_region+0x10/0x10 [ 32.933640] ? security_mmap_addr+0x7d/0xa0 [ 32.934169] ? get_unmapped_area+0x1f5/0x3f0 [ 32.934707] do_mmap+0x854/0xf00 [ 32.935141] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.935619] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.936194] ksys_mmap_pgoff+0x3af/0x500 [ 32.936701] do_syscall_64+0x3f/0x90 [ 32.937170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.937799] RIP: 0033:0x7efe3410bd82 [ 32.938259] 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 [ 32.940384] RSP: 002b:00007ffc82497048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.941296] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efe3410bd82 [ 32.942134] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efe33545000 [ 32.942976] RBP: 00007efe33545000 R08: 0000000000000009 R09: 0000000000001000 [ 32.943808] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f44a076ec0 [ 32.944648] R13: 00007ffc82497060 R14: 00007ffc82497090 R15: 00007ffc824973f0 [ 32.945499] [ 32.945788] [ 32.946004] Allocated by task 214: [ 32.946433] kasan_save_stack+0x22/0x50 [ 32.946935] kasan_set_track+0x25/0x30 [ 32.947420] __kasan_slab_alloc+0x59/0x70 [ 32.947928] kmem_cache_alloc+0x16b/0x370 [ 32.948452] vm_area_dup+0x20/0x160 [ 32.948900] __split_vma+0x170/0x950 [ 32.949377] split_vma+0xc6/0x110 [ 32.949806] mprotect_fixup+0x8d2/0xb30 [ 32.950304] do_mprotect_pkey+0x87e/0xd40 [ 32.950820] __x64_sys_mprotect+0x78/0xc0 [ 32.951331] do_syscall_64+0x3f/0x90 [ 32.951798] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.952443] [ 32.952651] Freed by task 214: [ 32.953042] kasan_save_stack+0x22/0x50 [ 32.953545] kasan_set_track+0x25/0x30 [ 32.954028] kasan_save_free_info+0x2b/0x50 [ 32.954547] __kasan_slab_free+0x10a/0x190 [ 32.955071] kmem_cache_free+0x10d/0x4d0 [ 32.955575] rcu_core+0x8c8/0x2860 [ 32.956010] __do_softirq+0x1b7/0x7d4 [ 32.956488] [ 32.956702] Last potentially related work creation: [ 32.957282] kasan_save_stack+0x22/0x50 [ 32.957777] __kasan_record_aux_stack+0x8e/0xa0 [ 32.958350] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.958983] remove_vma+0x139/0x170 [ 32.959427] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.959971] do_vmi_munmap+0x1f1/0x2b0 [ 32.960453] __vm_munmap+0x138/0x3a0 [ 32.960912] __x64_sys_munmap+0x59/0x80 [ 32.961407] do_syscall_64+0x3f/0x90 [ 32.961877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.962503] [ 32.962716] The buggy address belongs to the object at ffff88800eb41d98 [ 32.962716] which belongs to the cache vm_area_struct of size 168 [ 32.964205] The buggy address is located 88 bytes inside of [ 32.964205] freed 168-byte region [ffff88800eb41d98, ffff88800eb41e40) [ 32.965595] [ 32.965809] The buggy address belongs to the physical page: [ 32.966461] page:000000009827404f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb41 [ 32.967524] memcg:ffff888009512f01 [ 32.967947] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.968645] page_type: 0xffffffff() [ 32.969097] raw: 0100000000000200 ffff88800879fc80 ffffea00003c25c0 dead000000000003 [ 32.970001] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009512f01 [ 32.970894] page dumped because: kasan: bad access detected [ 32.971549] [ 32.971762] Memory state around the buggy address: [ 32.972345] ffff88800eb41c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 32.973198] ffff88800eb41d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 32.974039] >ffff88800eb41d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.974876] ^ [ 32.975677] ffff88800eb41e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.976545] ffff88800eb41e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.977396] ================================================================== [ 32.978583] Disabling lock debugging due to kernel taint [ 35.596995] BUG: Bad rss-counter state mm:00000000652922e1 type:MM_FILEPAGES val:33 [ 35.598172] BUG: Bad rss-counter state mm:00000000652922e1 type:MM_ANONPAGES val:22 [ 35.995990] BUG: Bad rss-counter state mm:0000000058ff6611 type:MM_FILEPAGES val:33 [ 35.996985] BUG: Bad rss-counter state mm:0000000058ff6611 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4458' (ECDSA) to the list of known hosts. 2023/06/19 21:19:09 fuzzer started 2023/06/19 21:19:09 dialing manager at localhost:44161 2023/06/19 21:19:09 checking machine... 2023/06/19 21:19:09 checking revisions... [ 36.778993] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:19:09 testing simple program... [ 36.838266] cgroup: Unknown subsys name 'net' [ 36.877624] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:19:06 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=1ffff110011aff3a RDX=dffffc0000000000 RSI=ffffffff8120674f RDI=ffff888008d7f978 RBP=ffff888008d7f9d0 RSP=ffff888008d7f908 R8 =0000000000000001 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=000000000000a1ff R12=ffff888008d7f9d8 R13=ffff888008d7f9c0 R14=ffff888008d7f9b9 R15=ffff888008d7f978 RIP=ffffffff81130706 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 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=00007fadf2c0e0b0 CR3=000000000db52000 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=39313a3132203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323833 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800d2baea8 RBX=ffff8880137e43f8 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffff8880137e43f8 RDI=1ffff11001a575d5 RBP=ffff8880137e43f8 RSP=ffff888008e57c98 R8 =0000000000000001 R9 =ffffed10011caf8b R10=0000000000000003 R11=0000000000000128 R12=ffff8880137e4408 R13=ffff88800ecceb18 R14=ffff8880137e43f8 R15=ffffffff87b86f80 RIP=ffffffff844cc32a 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=00007fead2333a30 CR3=000000000db52000 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=2038303a39313a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a39313a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000