syzkaller login: [ 30.492278] BUG: Bad rss-counter state mm:00000000bef8ba32 type:MM_FILEPAGES val:33 [ 30.493081] BUG: Bad rss-counter state mm:00000000bef8ba32 type:MM_ANONPAGES val:22 [ 30.614465] ================================================================== [ 30.615120] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.615790] Read of size 8 at addr ffff8880103554e0 by task sshd/221 [ 30.616320] [ 30.616470] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.617074] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.617906] Call Trace: [ 30.618148] [ 30.618361] dump_stack_lvl+0x91/0xf0 [ 30.618738] print_report+0xcc/0x620 [ 30.619359] ? __virt_addr_valid+0x102/0x340 [ 30.619768] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.620222] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.620790] kasan_report+0xbe/0xf0 [ 30.621127] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.621583] vma_interval_tree_remove+0xc75/0xec0 [ 30.622007] vma_prepare+0xc54/0x11a0 [ 30.622355] __split_vma+0x5af/0x950 [ 30.622694] ? __pfx___split_vma+0x10/0x10 [ 30.623069] ? find_held_lock+0x2c/0x110 [ 30.623450] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.623845] ? lock_is_held_type+0x9f/0x120 [ 30.624221] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.624652] ? mtree_range_walk+0x632/0x900 [ 30.625038] ? mas_walk+0x5c7/0x7c0 [ 30.625377] do_vmi_munmap+0x1f1/0x2b0 [ 30.625738] mmap_region+0x1f9/0x2660 [ 30.626087] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.626455] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.626960] ? __pfx_lock_acquire+0x10/0x10 [ 30.627367] ? __pfx_mmap_region+0x10/0x10 [ 30.627746] ? security_mmap_addr+0x7d/0xa0 [ 30.628116] ? get_unmapped_area+0x1f5/0x3f0 [ 30.628501] do_mmap+0x854/0xf00 [ 30.628809] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.629158] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.629549] ksys_mmap_pgoff+0x3af/0x500 [ 30.629908] do_syscall_64+0x3f/0x90 [ 30.630248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.630706] RIP: 0033:0x7f8a980e7d82 [ 30.631031] 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 [ 30.632552] RSP: 002b:00007ffc2e7bd4f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.633193] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8a980e7d82 [ 30.633787] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8a97521000 [ 30.634376] RBP: 00007f8a97521000 R08: 0000000000000009 R09: 0000000000001000 [ 30.634961] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561cce78eec0 [ 30.635582] R13: 00007ffc2e7bd510 R14: 00007ffc2e7bd540 R15: 00007ffc2e7bd8a0 [ 30.636195] [ 30.636407] [ 30.636560] Allocated by task 213: [ 30.636866] kasan_save_stack+0x22/0x50 [ 30.637227] kasan_set_track+0x25/0x30 [ 30.637583] __kasan_slab_alloc+0x59/0x70 [ 30.637959] kmem_cache_alloc+0x16b/0x370 [ 30.638325] vm_area_dup+0x20/0x160 [ 30.638649] __split_vma+0x170/0x950 [ 30.638978] split_vma+0xc6/0x110 [ 30.639293] mprotect_fixup+0x8d2/0xb30 [ 30.639684] do_mprotect_pkey+0x87e/0xd40 [ 30.640052] __x64_sys_mprotect+0x78/0xc0 [ 30.640417] do_syscall_64+0x3f/0x90 [ 30.640764] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.641212] [ 30.641361] Freed by task 213: [ 30.641643] kasan_save_stack+0x22/0x50 [ 30.642001] kasan_set_track+0x25/0x30 [ 30.642352] kasan_save_free_info+0x2b/0x50 [ 30.642730] __kasan_slab_free+0x10a/0x190 [ 30.643109] kmem_cache_free+0x10d/0x4d0 [ 30.643488] rcu_core+0x8c8/0x2860 [ 30.643802] __do_softirq+0x1b7/0x7d4 [ 30.644147] [ 30.644300] Last potentially related work creation: [ 30.644715] kasan_save_stack+0x22/0x50 [ 30.645072] __kasan_record_aux_stack+0x8e/0xa0 [ 30.645478] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.645939] remove_vma+0x139/0x170 [ 30.646263] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.646656] do_vmi_munmap+0x1f1/0x2b0 [ 30.647006] __vm_munmap+0x138/0x3a0 [ 30.647355] __x64_sys_munmap+0x59/0x80 [ 30.647717] do_syscall_64+0x3f/0x90 [ 30.648050] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.648497] [ 30.648650] The buggy address belongs to the object at ffff888010355488 [ 30.648650] which belongs to the cache vm_area_struct of size 168 [ 30.649686] The buggy address is located 88 bytes inside of [ 30.649686] freed 168-byte region [ffff888010355488, ffff888010355530) [ 30.650686] [ 30.650844] The buggy address belongs to the physical page: [ 30.651343] page:000000000bd9a879 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10355 [ 30.652116] memcg:ffff88800fb26d01 [ 30.652415] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.652871] page_type: 0xffffffff() [ 30.653196] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.653848] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fb26d01 [ 30.654490] page dumped because: kasan: bad access detected [ 30.654964] [ 30.655108] Memory state around the buggy address: [ 30.655532] ffff888010355380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.656141] ffff888010355400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.656753] >ffff888010355480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.657350] ^ [ 30.657897] ffff888010355500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.658503] ffff888010355580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.659099] ================================================================== [ 30.659855] Disabling lock debugging due to kernel taint [ 32.060267] BUG: Bad rss-counter state mm:000000009bb3b9cc type:MM_FILEPAGES val:33 [ 32.060938] BUG: Bad rss-counter state mm:000000009bb3b9cc type:MM_ANONPAGES val:22 [ 32.423274] BUG: Bad rss-counter state mm:00000000b541d7ea type:MM_FILEPAGES val:33 [ 32.423992] BUG: Bad rss-counter state mm:00000000b541d7ea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4989' (ECDSA) to the list of known hosts. 2023/06/21 09:08:00 fuzzer started 2023/06/21 09:08:00 dialing manager at localhost:36067 2023/06/21 09:08:00 checking machine... 2023/06/21 09:08:00 checking revisions... [ 32.997562] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:08:00 testing simple program... [ 33.030775] cgroup: Unknown subsys name 'net' [ 33.082284] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:08:00 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff8880142b78a8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=ffff8880158e6760 R15=0000000000000000 RIP=ffffffff8135b960 RFL=00000216 [----AP-] 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 00007f7339e69900 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=00007ffe89d34000 CR3=0000000019cd2000 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=6c697473206e61632073726573552023 XMM01=20656c706f657020726568746f20776f XMM02=0000000000000000000000000000ffff XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=6120776f6c6c6120746f6e206f740000 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f2b73371950 CR3=000000000e780000 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=2030303a38303a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a37303a3930203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000