syzkaller login: [ 31.892926] BUG: Bad rss-counter state mm:00000000efc56f62 type:MM_FILEPAGES val:33 [ 31.893946] BUG: Bad rss-counter state mm:00000000efc56f62 type:MM_ANONPAGES val:22 [ 32.086633] ================================================================== [ 32.087619] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.088678] Read of size 8 at addr ffff888016a0b140 by task sshd/224 [ 32.089563] [ 32.089796] CPU: 1 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.090723] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.091774] Call Trace: [ 32.092111] [ 32.092413] dump_stack_lvl+0x91/0xf0 [ 32.092929] print_report+0xcc/0x620 [ 32.093453] ? __virt_addr_valid+0x102/0x340 [ 32.094035] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.094718] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.095372] kasan_report+0xbe/0xf0 [ 32.095875] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.096539] vma_interval_tree_remove+0xc75/0xec0 [ 32.097172] vma_prepare+0xc54/0x11a0 [ 32.097677] __split_vma+0x5af/0x950 [ 32.098181] ? __pfx___split_vma+0x10/0x10 [ 32.098748] ? find_held_lock+0x2c/0x110 [ 32.099298] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.099895] ? lock_is_held_type+0x9f/0x120 [ 32.100465] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.101107] ? mtree_range_walk+0x632/0x900 [ 32.101688] ? mas_walk+0x5c7/0x7c0 [ 32.102188] do_vmi_munmap+0x1f1/0x2b0 [ 32.102722] mmap_region+0x1f9/0x2660 [ 32.103236] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.103795] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.104586] ? __pfx_lock_acquire+0x10/0x10 [ 32.105179] ? __pfx_mmap_region+0x10/0x10 [ 32.105761] ? security_mmap_addr+0x7d/0xa0 [ 32.106371] ? get_unmapped_area+0x1f5/0x3f0 [ 32.106979] do_mmap+0x854/0xf00 [ 32.107464] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.108011] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.108634] ksys_mmap_pgoff+0x3af/0x500 [ 32.109199] do_syscall_64+0x3f/0x90 [ 32.109723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.110453] RIP: 0033:0x7fc21ad34d82 [ 32.110962] 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 [ 32.113316] RSP: 002b:00007ffcb454c6f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.114315] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc21ad34d82 [ 32.115267] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc21a16e000 [ 32.116208] RBP: 00007fc21a16e000 R08: 0000000000000009 R09: 0000000000001000 [ 32.117138] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f12bf91b20 [ 32.118066] R13: 00007ffcb454c710 R14: 00007ffcb454c740 R15: 00007ffcb454caa0 [ 32.119024] [ 32.119346] [ 32.119583] Allocated by task 214: [ 32.120056] kasan_save_stack+0x22/0x50 [ 32.120610] kasan_set_track+0x25/0x30 [ 32.121155] __kasan_slab_alloc+0x59/0x70 [ 32.121732] kmem_cache_alloc+0x16b/0x370 [ 32.122308] vm_area_dup+0x20/0x160 [ 32.122821] __split_vma+0x170/0x950 [ 32.123338] split_vma+0xc6/0x110 [ 32.123820] mprotect_fixup+0x8d2/0xb30 [ 32.124381] do_mprotect_pkey+0x87e/0xd40 [ 32.124951] __x64_sys_mprotect+0x78/0xc0 [ 32.125522] do_syscall_64+0x3f/0x90 [ 32.126043] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.126767] [ 32.127003] Freed by task 214: [ 32.127438] kasan_save_stack+0x22/0x50 [ 32.127989] kasan_set_track+0x25/0x30 [ 32.128531] kasan_save_free_info+0x2b/0x50 [ 32.129113] __kasan_slab_free+0x10a/0x190 [ 32.129701] kmem_cache_free+0x10d/0x4d0 [ 32.130269] rcu_core+0x8c8/0x2860 [ 32.130771] __do_softirq+0x1b7/0x7d4 [ 32.131297] [ 32.131534] Last potentially related work creation: [ 32.132177] kasan_save_stack+0x22/0x50 [ 32.132735] __kasan_record_aux_stack+0x8e/0xa0 [ 32.133363] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.134076] remove_vma+0x139/0x170 [ 32.134584] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.135199] do_vmi_munmap+0x1f1/0x2b0 [ 32.135733] __vm_munmap+0x138/0x3a0 [ 32.136254] __x64_sys_munmap+0x59/0x80 [ 32.136805] do_syscall_64+0x3f/0x90 [ 32.137328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.138036] [ 32.138276] The buggy address belongs to the object at ffff888016a0b0e8 [ 32.138276] which belongs to the cache vm_area_struct of size 168 [ 32.139925] The buggy address is located 88 bytes inside of [ 32.139925] freed 168-byte region [ffff888016a0b0e8, ffff888016a0b190) [ 32.141470] [ 32.141706] The buggy address belongs to the physical page: [ 32.142444] page:000000009d6fd816 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a0b [ 32.143654] memcg:ffff888016a07401 [ 32.144129] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.144901] page_type: 0xffffffff() [ 32.145401] raw: 0100000000000200 ffff88800879fc80 ffffea00005a8240 0000000000000005 [ 32.146437] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a07401 [ 32.147441] page dumped because: kasan: bad access detected [ 32.148167] [ 32.148402] Memory state around the buggy address: [ 32.149044] ffff888016a0b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.149983] ffff888016a0b080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.150943] >ffff888016a0b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.151886] ^ [ 32.152593] ffff888016a0b180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 32.153539] ffff888016a0b200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.154508] ================================================================== [ 32.155925] Disabling lock debugging due to kernel taint [ 34.016416] BUG: Bad rss-counter state mm:00000000f45fbeb6 type:MM_FILEPAGES val:33 [ 34.017689] BUG: Bad rss-counter state mm:00000000f45fbeb6 type:MM_ANONPAGES val:22 [ 34.536427] BUG: Bad rss-counter state mm:00000000d58a6210 type:MM_FILEPAGES val:33 [ 34.537447] BUG: Bad rss-counter state mm:00000000d58a6210 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26193' (ECDSA) to the list of known hosts. 2023/06/19 15:31:20 fuzzer started 2023/06/19 15:31:20 dialing manager at localhost:44161 2023/06/19 15:31:20 checking machine... 2023/06/19 15:31:20 checking revisions... [ 35.244308] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:31:20 testing simple program... [ 35.287514] cgroup: Unknown subsys name 'net' [ 35.338931] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:31:16 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007efdfc9e1160 CR3=0000000008eec000 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=d559c18a172f48a7474254d160c4a50d XMM02=ec2efd57dc4c00df000000000011e918 XMM03=c8d546b88f136893000000000011e9e8 XMM04=fb8b497e97c33a7700000000000ae988 XMM05=fa6e98841c4462010000000000136738 XMM06=00c3ffa147b8d8570000000000135528 XMM07=fb795ef6d65770560000000000125310 XMM08=2c67c8bc2e329bc3000000000011e988 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000000d RBX=000000007f17bcd8 RCX=ffff88806c7de6c0 RDX=000000000000000e RSI=ffffffff846000aa RDI=000000005a15ad5d RBP=ffff88800d58d040 RSP=ffff88800f01f7d8 R8 =000000004b7467b3 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000000 R14=ffff88800f01f840 R15=000000000000000e RIP=ffffffff82270f3c RFL=00000202 [-------] 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 00007f96b002d900 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=00007ffe28a94000 CR3=0000000015c68000 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