syzkaller login: [ 32.962512] BUG: Bad rss-counter state mm:00000000126e4e52 type:MM_FILEPAGES val:33 [ 32.963708] BUG: Bad rss-counter state mm:00000000126e4e52 type:MM_ANONPAGES val:22 [ 33.130996] ================================================================== [ 33.132185] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.133544] Read of size 8 at addr ffff888016906228 by task sshd/220 [ 33.134386] [ 33.134627] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.135596] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.136688] Call Trace: [ 33.137045] [ 33.137362] dump_stack_lvl+0x91/0xf0 [ 33.137925] print_report+0xcc/0x620 [ 33.138477] ? __virt_addr_valid+0x102/0x340 [ 33.139121] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.139840] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.140576] kasan_report+0xbe/0xf0 [ 33.141122] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.141858] vma_interval_tree_remove+0xc75/0xec0 [ 33.142612] vma_prepare+0xc54/0x11a0 [ 33.143169] __split_vma+0x5af/0x950 [ 33.143713] ? __pfx___split_vma+0x10/0x10 [ 33.144320] ? find_held_lock+0x2c/0x110 [ 33.144949] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.145604] ? lock_is_held_type+0x9f/0x120 [ 33.146235] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.146931] ? mtree_range_walk+0x632/0x900 [ 33.147567] ? mas_walk+0x5c7/0x7c0 [ 33.148121] do_vmi_munmap+0x1f1/0x2b0 [ 33.148720] mmap_region+0x1f9/0x2660 [ 33.149290] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.149880] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.150704] ? __pfx_lock_acquire+0x10/0x10 [ 33.151325] ? __pfx_mmap_region+0x10/0x10 [ 33.151942] ? security_mmap_addr+0x7d/0xa0 [ 33.152569] ? get_unmapped_area+0x1f5/0x3f0 [ 33.153210] do_mmap+0x854/0xf00 [ 33.153719] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.154293] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.154940] ksys_mmap_pgoff+0x3af/0x500 [ 33.155533] do_syscall_64+0x3f/0x90 [ 33.156085] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.156839] RIP: 0033:0x7fd027bb8d82 [ 33.157363] 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 [ 33.159802] RSP: 002b:00007ffcf34e1068 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.160848] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd027bb8d82 [ 33.161832] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd026ff2000 [ 33.162816] RBP: 00007fd026ff2000 R08: 0000000000000009 R09: 0000000000001000 [ 33.163792] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560f5bf03f70 [ 33.164787] R13: 00007ffcf34e1080 R14: 00007ffcf34e10b0 R15: 00007ffcf34e1410 [ 33.165774] [ 33.166106] [ 33.166350] Allocated by task 213: [ 33.166848] kasan_save_stack+0x22/0x50 [ 33.167424] kasan_set_track+0x25/0x30 [ 33.168005] __kasan_slab_alloc+0x59/0x70 [ 33.168628] kmem_cache_alloc+0x16b/0x370 [ 33.169234] vm_area_dup+0x20/0x160 [ 33.169760] __split_vma+0x170/0x950 [ 33.170297] split_vma+0xc6/0x110 [ 33.170799] mprotect_fixup+0x8d2/0xb30 [ 33.171383] do_mprotect_pkey+0x87e/0xd40 [ 33.171988] __x64_sys_mprotect+0x78/0xc0 [ 33.172597] do_syscall_64+0x3f/0x90 [ 33.173134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.173884] [ 33.174132] Freed by task 213: [ 33.174577] kasan_save_stack+0x22/0x50 [ 33.175156] kasan_set_track+0x25/0x30 [ 33.175730] kasan_save_free_info+0x2b/0x50 [ 33.176361] __kasan_slab_free+0x10a/0x190 [ 33.176997] kmem_cache_free+0x10d/0x4d0 [ 33.177572] rcu_core+0x8c8/0x2860 [ 33.178084] __do_softirq+0x1b7/0x7d4 [ 33.178641] [ 33.178887] Last potentially related work creation: [ 33.179563] kasan_save_stack+0x22/0x50 [ 33.180147] __kasan_record_aux_stack+0x8e/0xa0 [ 33.180825] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.181574] remove_vma+0x139/0x170 [ 33.182087] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.182730] do_vmi_munmap+0x1f1/0x2b0 [ 33.183288] __vm_munmap+0x138/0x3a0 [ 33.183827] __x64_sys_munmap+0x59/0x80 [ 33.184391] do_syscall_64+0x3f/0x90 [ 33.184948] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.185678] [ 33.185924] The buggy address belongs to the object at ffff8880169061d0 [ 33.185924] which belongs to the cache vm_area_struct of size 168 [ 33.187635] The buggy address is located 88 bytes inside of [ 33.187635] freed 168-byte region [ffff8880169061d0, ffff888016906278) [ 33.189270] [ 33.189519] The buggy address belongs to the physical page: [ 33.190278] page:000000007bdf1037 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16906 [ 33.191536] memcg:ffff888016907001 [ 33.192031] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.192786] page_type: 0xffffffff() [ 33.193288] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.194353] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016907001 [ 33.195394] page dumped because: kasan: bad access detected [ 33.196145] [ 33.196391] Memory state around the buggy address: [ 33.197070] ffff888016906100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.198040] ffff888016906180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.199008] >ffff888016906200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.199982] ^ [ 33.200616] ffff888016906280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.201631] ffff888016906300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.202594] ================================================================== [ 33.203741] Disabling lock debugging due to kernel taint [ 36.252423] BUG: Bad rss-counter state mm:00000000995718ee type:MM_FILEPAGES val:33 [ 36.253167] BUG: Bad rss-counter state mm:00000000995718ee type:MM_ANONPAGES val:22 [ 36.745071] BUG: Bad rss-counter state mm:0000000072adf068 type:MM_FILEPAGES val:33 [ 36.746327] BUG: Bad rss-counter state mm:0000000072adf068 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23120' (ECDSA) to the list of known hosts. 2023/06/20 05:42:50 fuzzer started 2023/06/20 05:42:50 dialing manager at localhost:44161 2023/06/20 05:42:50 checking machine... 2023/06/20 05:42:50 checking revisions... [ 37.503536] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:42:50 testing simple program... [ 37.555012] cgroup: Unknown subsys name 'net' [ 37.601963] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:42:47 Registers: info registers vcpu 0 RAX=000000000000002c RBX=00000000000000e1 RCX=00007f22dc8d8366 RDX=00000000000000f4 RSI=00007ffc3eefe6d0 RDI=0000000000000008 RBP=00000000000000f4 RSP=00007ffc3eefe698 R8 =00007ffc3eefe6bc R9 =000000000000000c R10=0000000000000000 R11=0000000000000246 R12=0000000000000008 R13=00007ffc3eefe6d0 R14=00007ffc3eefe6bc R15=0000000000000452 RIP=ffffffff84600004 RFL=00000002 [-------] 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 00007f22dc3e5900 00000000 00000000 GS =0000 0000000000000000 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=00007ffc3eeff000 CR3=0000000009512000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000004390009 RBX=0000000000000000 RCX=ffff88806c7a9250 RDX=0000000000000000 RSI=ffffffff84531da7 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88806cf09b98 R8 =00000000db160721 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000000000 R12=0000000000000000 R13=ffffea0000642500 R14=ffffffff813782a8 R15=0000000000000006 RIP=ffffffff82270e58 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 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=00007faa78608410 CR3=000000000c9c2000 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=0b5e1e71419b4fb41a4e79c97581da02 XMM02=000000000011da18ec2efd57dc4c00df XMM03=00000000001247c09af1dbbc520d1483 XMM04=029534bb56a1dfe200000000000ae988 XMM05=19e9129bd510f2350000000000134350 XMM06=a8eb2d4ead2340b100000000001331b8 XMM07=e042d86d42eb936e0000000000124a40 XMM08=9af1dbbc520d1483000000000011da78 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000