syzkaller login: [ 30.199446] BUG: Bad rss-counter state mm:0000000005c9c7a6 type:MM_FILEPAGES val:33 [ 30.200876] BUG: Bad rss-counter state mm:0000000005c9c7a6 type:MM_ANONPAGES val:22 [ 30.364223] ================================================================== [ 30.365128] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.366046] Read of size 8 at addr ffff88801a167310 by task sshd/221 [ 30.366806] [ 30.367022] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.367976] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.368947] Call Trace: [ 30.369265] [ 30.369667] dump_stack_lvl+0x91/0xf0 [ 30.370154] print_report+0xcc/0x620 [ 30.370629] ? __virt_addr_valid+0x102/0x340 [ 30.371173] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.371793] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.372416] kasan_report+0xbe/0xf0 [ 30.372890] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.373500] vma_interval_tree_remove+0xc75/0xec0 [ 30.374099] vma_prepare+0xc54/0x11a0 [ 30.374579] __split_vma+0x5af/0x950 [ 30.375051] ? __pfx___split_vma+0x10/0x10 [ 30.375576] ? find_held_lock+0x2c/0x110 [ 30.376098] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.376661] ? lock_is_held_type+0x9f/0x120 [ 30.377188] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.377795] ? mtree_range_walk+0x632/0x900 [ 30.378335] ? mas_walk+0x5c7/0x7c0 [ 30.378810] do_vmi_munmap+0x1f1/0x2b0 [ 30.379299] mmap_region+0x1f9/0x2660 [ 30.379783] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.380299] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.381032] ? __pfx_lock_acquire+0x10/0x10 [ 30.381554] ? __pfx_mmap_region+0x10/0x10 [ 30.382084] ? security_mmap_addr+0x7d/0xa0 [ 30.382608] ? get_unmapped_area+0x1f5/0x3f0 [ 30.383150] do_mmap+0x854/0xf00 [ 30.383587] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.384084] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.384661] ksys_mmap_pgoff+0x3af/0x500 [ 30.385170] do_syscall_64+0x3f/0x90 [ 30.385642] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.386286] RIP: 0033:0x7f10aa2c2d82 [ 30.386734] 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 [ 30.388855] RSP: 002b:00007ffe657fd9b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.389746] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f10aa2c2d82 [ 30.390583] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f10a96fc000 [ 30.391427] RBP: 00007f10a96fc000 R08: 0000000000000009 R09: 0000000000001000 [ 30.392257] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b37a75df70 [ 30.393109] R13: 00007ffe657fd9d0 R14: 00007ffe657fda00 R15: 00007ffe657fdd60 [ 30.393953] [ 30.394240] [ 30.394451] Allocated by task 214: [ 30.394870] kasan_save_stack+0x22/0x50 [ 30.395365] kasan_set_track+0x25/0x30 [ 30.395855] __kasan_slab_alloc+0x59/0x70 [ 30.396368] kmem_cache_alloc+0x16b/0x370 [ 30.396900] vm_area_dup+0x20/0x160 [ 30.397353] __split_vma+0x170/0x950 [ 30.397815] split_vma+0xc6/0x110 [ 30.398260] mprotect_fixup+0x8d2/0xb30 [ 30.398756] do_mprotect_pkey+0x87e/0xd40 [ 30.399272] __x64_sys_mprotect+0x78/0xc0 [ 30.399794] do_syscall_64+0x3f/0x90 [ 30.400261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.400899] [ 30.401120] Freed by task 214: [ 30.401505] kasan_save_stack+0x22/0x50 [ 30.401999] kasan_set_track+0x25/0x30 [ 30.402482] kasan_save_free_info+0x2b/0x50 [ 30.403008] __kasan_slab_free+0x10a/0x190 [ 30.403536] kmem_cache_free+0x10d/0x4d0 [ 30.404039] rcu_core+0x8c8/0x2860 [ 30.404487] __do_softirq+0x1b7/0x7d4 [ 30.404965] [ 30.405180] Last potentially related work creation: [ 30.405756] kasan_save_stack+0x22/0x50 [ 30.406267] __kasan_record_aux_stack+0x8e/0xa0 [ 30.406872] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.407545] remove_vma+0x139/0x170 [ 30.408014] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.408612] do_vmi_munmap+0x1f1/0x2b0 [ 30.409124] __vm_munmap+0x138/0x3a0 [ 30.409601] __x64_sys_munmap+0x59/0x80 [ 30.410122] do_syscall_64+0x3f/0x90 [ 30.410618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.411288] [ 30.411514] The buggy address belongs to the object at ffff88801a1672b8 [ 30.411514] which belongs to the cache vm_area_struct of size 168 [ 30.413067] The buggy address is located 88 bytes inside of [ 30.413067] freed 168-byte region [ffff88801a1672b8, ffff88801a167360) [ 30.414531] [ 30.414754] The buggy address belongs to the physical page: [ 30.415454] page:00000000cac400f6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a167 [ 30.416618] memcg:ffff888014313201 [ 30.417070] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.417746] page_type: 0xffffffff() [ 30.418202] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.419163] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014313201 [ 30.420111] page dumped because: kasan: bad access detected [ 30.420815] [ 30.421042] Memory state around the buggy address: [ 30.421652] ffff88801a167200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.422552] ffff88801a167280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.423461] >ffff88801a167300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.424353] ^ [ 30.424857] ffff88801a167380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.425730] ffff88801a167400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.426596] ================================================================== [ 30.427947] Disabling lock debugging due to kernel taint [ 32.755674] BUG: Bad rss-counter state mm:0000000038809aba type:MM_FILEPAGES val:33 [ 32.756673] BUG: Bad rss-counter state mm:0000000038809aba type:MM_ANONPAGES val:22 [ 33.229829] BUG: Bad rss-counter state mm:00000000c79d966e type:MM_FILEPAGES val:33 [ 33.230981] BUG: Bad rss-counter state mm:00000000c79d966e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19472' (ECDSA) to the list of known hosts. 2023/06/20 22:59:41 fuzzer started 2023/06/20 22:59:41 dialing manager at localhost:36067 2023/06/20 22:59:41 checking machine... 2023/06/20 22:59:41 checking revisions... [ 33.907093] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:59:41 testing simple program... [ 33.949894] cgroup: Unknown subsys name 'net' [ 34.006410] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:59:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff1100285ef7b RCX=0000000000000000 RDX=0000000000000038 RSI=00007ffda9e50c10 RDI=ffff8880142f7bf8 RBP=00007ffda9e50c10 RSP=ffff8880142f7ba8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000040000040 R11=0000000000000000 R12=00007ffda9e50c10 R13=ffff8880142f7bf8 R14=ffff8880142f7cf8 R15=ffff8880142f7cd8 RIP=ffffffff8217ba72 RFL=00000293 [--S-A-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 00007f9a0db79900 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=00007f9a0cfd48d0 CR3=000000000ca50000 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=b9af5b0ea3c30aa7fc4e5b9df4bf1afa XMM02=ec2efd57dc4c00df000000000011d950 XMM03=356d7b0614104c0d000000000011da20 XMM04=a798713c47a4cebc00000000000ae988 XMM05=6b4ca473553b29c50000000000132ff8 XMM06=e4cb8bb95a7664b60000000000131eb0 XMM07=fb795ef6d65770560000000000122050 XMM08=2c67c8bc2e329bc3000000000011d9c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800dc87ed0 RCX=0000000000000000 RDX=ffff888019efd1c0 RSI=ffffffff818c2b74 RDI=ffff88800dc87ed0 RBP=ffff88800dc87ea0 RSP=ffff88800dc87e78 R8 =0000000000000007 R9 =0000000000000000 R10=000000001dcd6500 R11=0000000000000000 R12=0000000000000000 R13=000000001dcd6500 R14=000000001dcd6500 R15=0000000000000000 RIP=ffffffff813c9b94 RFL=00000293 [--S-A-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 00007fb638da4900 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=00007fffb0114000 CR3=000000000e51e000 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=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