syzkaller login: [ 35.997904] BUG: Bad rss-counter state mm:00000000bbcba7b3 type:MM_FILEPAGES val:33 [ 35.999113] BUG: Bad rss-counter state mm:00000000bbcba7b3 type:MM_ANONPAGES val:22 [ 36.133891] ================================================================== [ 36.134945] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.135911] Read of size 8 at addr ffff888019857798 by task sshd/220 [ 36.136713] [ 36.136934] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.137839] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.138862] Call Trace: [ 36.139194] [ 36.139488] dump_stack_lvl+0x91/0xf0 [ 36.140009] print_report+0xcc/0x620 [ 36.140501] ? __virt_addr_valid+0x102/0x340 [ 36.141074] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.141770] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.142431] kasan_report+0xbe/0xf0 [ 36.142947] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.143615] vma_interval_tree_remove+0xc75/0xec0 [ 36.144305] vma_prepare+0xc54/0x11a0 [ 36.144834] __split_vma+0x5af/0x950 [ 36.145370] ? __pfx___split_vma+0x10/0x10 [ 36.145954] ? find_held_lock+0x2c/0x110 [ 36.146518] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.147130] ? lock_is_held_type+0x9f/0x120 [ 36.147724] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.148367] ? mtree_range_walk+0x632/0x900 [ 36.148954] ? mas_walk+0x5c7/0x7c0 [ 36.149492] do_vmi_munmap+0x1f1/0x2b0 [ 36.150048] mmap_region+0x1f9/0x2660 [ 36.150582] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.151134] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.151908] ? __pfx_lock_acquire+0x10/0x10 [ 36.152487] ? __pfx_mmap_region+0x10/0x10 [ 36.153059] ? security_mmap_addr+0x7d/0xa0 [ 36.153677] ? get_unmapped_area+0x1f5/0x3f0 [ 36.154294] do_mmap+0x854/0xf00 [ 36.154780] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.155315] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.155921] ksys_mmap_pgoff+0x3af/0x500 [ 36.156475] do_syscall_64+0x3f/0x90 [ 36.156987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.157719] RIP: 0033:0x7f2c1b20bd82 [ 36.158200] 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 [ 36.160498] RSP: 002b:00007ffc9740eaf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.161459] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2c1b20bd82 [ 36.162355] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2c1a645000 [ 36.163223] RBP: 00007f2c1a645000 R08: 0000000000000009 R09: 0000000000001000 [ 36.164098] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bf0c185ec0 [ 36.164965] R13: 00007ffc9740eb10 R14: 00007ffc9740eb40 R15: 00007ffc9740eea0 [ 36.165884] [ 36.166180] [ 36.166394] Allocated by task 213: [ 36.166862] kasan_save_stack+0x22/0x50 [ 36.167380] kasan_set_track+0x25/0x30 [ 36.167905] __kasan_slab_alloc+0x59/0x70 [ 36.168432] kmem_cache_alloc+0x16b/0x370 [ 36.168971] vm_area_dup+0x20/0x160 [ 36.169462] __split_vma+0x170/0x950 [ 36.169961] split_vma+0xc6/0x110 [ 36.170412] mprotect_fixup+0x8d2/0xb30 [ 36.170935] do_mprotect_pkey+0x87e/0xd40 [ 36.171469] __x64_sys_mprotect+0x78/0xc0 [ 36.172052] do_syscall_64+0x3f/0x90 [ 36.172525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.173196] [ 36.173412] Freed by task 19: [ 36.173812] kasan_save_stack+0x22/0x50 [ 36.174322] kasan_set_track+0x25/0x30 [ 36.174836] kasan_save_free_info+0x2b/0x50 [ 36.175374] __kasan_slab_free+0x10a/0x190 [ 36.175918] kmem_cache_free+0x10d/0x4d0 [ 36.176430] rcu_core+0x8c8/0x2860 [ 36.176904] __do_softirq+0x1b7/0x7d4 [ 36.177419] [ 36.177653] Last potentially related work creation: [ 36.178249] kasan_save_stack+0x22/0x50 [ 36.178775] __kasan_record_aux_stack+0x8e/0xa0 [ 36.179371] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.180037] remove_vma+0x139/0x170 [ 36.180502] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.181080] do_vmi_munmap+0x1f1/0x2b0 [ 36.181606] __vm_munmap+0x138/0x3a0 [ 36.182127] __x64_sys_munmap+0x59/0x80 [ 36.182662] do_syscall_64+0x3f/0x90 [ 36.183168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.183865] [ 36.184094] The buggy address belongs to the object at ffff888019857740 [ 36.184094] which belongs to the cache vm_area_struct of size 168 [ 36.185704] The buggy address is located 88 bytes inside of [ 36.185704] freed 168-byte region [ffff888019857740, ffff8880198577e8) [ 36.187239] [ 36.187470] The buggy address belongs to the physical page: [ 36.188200] page:0000000005add1c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19857 [ 36.189446] memcg:ffff888017ed7d01 [ 36.189912] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.190616] page_type: 0xffffffff() [ 36.191113] raw: 0100000000000200 ffff88800879fc80 ffffea000025ca00 dead000000000002 [ 36.192140] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017ed7d01 [ 36.193119] page dumped because: kasan: bad access detected [ 36.193859] [ 36.194090] Memory state around the buggy address: [ 36.194724] ffff888019857680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.195654] ffff888019857700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 36.196584] >ffff888019857780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 36.197524] ^ [ 36.198081] ffff888019857800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 36.199026] ffff888019857880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 36.199982] ================================================================== [ 36.201328] Disabling lock debugging due to kernel taint [ 38.251602] BUG: Bad rss-counter state mm:000000001ab86b9a type:MM_FILEPAGES val:33 [ 38.252800] BUG: Bad rss-counter state mm:000000001ab86b9a type:MM_ANONPAGES val:22 [ 38.655258] BUG: Bad rss-counter state mm:000000009836bc73 type:MM_FILEPAGES val:33 [ 38.656884] BUG: Bad rss-counter state mm:000000009836bc73 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51002' (ECDSA) to the list of known hosts. 2023/06/20 03:45:41 fuzzer started 2023/06/20 03:45:42 dialing manager at localhost:44161 2023/06/20 03:45:42 checking machine... 2023/06/20 03:45:42 checking revisions... [ 39.366505] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:45:42 testing simple program... [ 39.424507] cgroup: Unknown subsys name 'net' [ 39.467000] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:45:36 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8180c585 RCX=ffffffff86137501 RDX=1ffff1100d9c135e RSI=0000000000000000 RDI=ffffffff8180c585 RBP=ffff88806ce09af0 RSP=ffff88806ce09a68 R8 =ffffffff8613751e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff8880098eac60 RIP=ffffffff811fc7a0 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=00007fa241c4ed50 CR3=000000000d54c000 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=00000000000000000000000000000000 XMM01=4e5c5e8a296b63ac9049d9bf36895662 XMM02=ec2efd57dc4c00df000000000011d960 XMM03=275a58ff92fc26d0000000000011da30 XMM04=30c46188a74cf84d00000000000ae988 XMM05=19e9129bd510f2350000000000134338 XMM06=af8ba4cc70f6469d00000000001331a0 XMM07=e042d86d42eb936e0000000000124a30 XMM08=275a58ff92fc26d0000000000011da30 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000020d8a RBX=0000000000000001 RCX=ffffffff8180c584 RDX=0000000000020d9b RSI=00000000000080c5 RDI=ffffffff8613756e RBP=ffff8880169671b0 RSP=ffff8880169670e8 R8 =ffffffff86137508 R9 =ffff888016967198 R10=0000000000038001 R11=0000000000020d8a R12=ffff8880169671b8 R13=ffff8880169671a0 R14=ffff888016967199 R15=ffff888016967158 RIP=ffffffff81130868 RFL=00000283 [--S---C] 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 00007f121122e900 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=00007f12117e5618 CR3=000000000c4ce000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000