syzkaller login: [ 33.923216] BUG: Bad rss-counter state mm:00000000d190ec59 type:MM_FILEPAGES val:33 [ 33.924255] BUG: Bad rss-counter state mm:00000000d190ec59 type:MM_ANONPAGES val:22 [ 34.095445] ================================================================== [ 34.096349] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.097283] Read of size 8 at addr ffff888018de8798 by task sshd/227 [ 34.098057] [ 34.098437] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.099301] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.100271] Call Trace: [ 34.100628] [ 34.100911] dump_stack_lvl+0x91/0xf0 [ 34.101409] print_report+0xcc/0x620 [ 34.101902] ? __virt_addr_valid+0x102/0x340 [ 34.102455] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.103075] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.103694] kasan_report+0xbe/0xf0 [ 34.104176] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.104803] vma_interval_tree_remove+0xc75/0xec0 [ 34.105415] vma_prepare+0xc54/0x11a0 [ 34.105914] __split_vma+0x5af/0x950 [ 34.106388] ? __pfx___split_vma+0x10/0x10 [ 34.106916] ? find_held_lock+0x2c/0x110 [ 34.107447] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.108019] ? lock_is_held_type+0x9f/0x120 [ 34.108563] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.109169] ? mtree_range_walk+0x632/0x900 [ 34.109723] ? mas_walk+0x5c7/0x7c0 [ 34.110224] do_vmi_munmap+0x1f1/0x2b0 [ 34.110717] mmap_region+0x1f9/0x2660 [ 34.111207] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.111726] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.112441] ? __pfx_lock_acquire+0x10/0x10 [ 34.112978] ? __pfx_mmap_region+0x10/0x10 [ 34.113514] ? security_mmap_addr+0x7d/0xa0 [ 34.114060] ? get_unmapped_area+0x1f5/0x3f0 [ 34.114607] do_mmap+0x854/0xf00 [ 34.115045] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.115543] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.116111] ksys_mmap_pgoff+0x3af/0x500 [ 34.116625] do_syscall_64+0x3f/0x90 [ 34.117106] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.117753] RIP: 0033:0x7f9d3828ed82 [ 34.118219] 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 [ 34.120352] RSP: 002b:00007fff13f48948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.121264] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9d3828ed82 [ 34.122133] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9d376c8000 [ 34.122995] RBP: 00007f9d376c8000 R08: 0000000000000009 R09: 0000000000001000 [ 34.123852] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d5ac702ec0 [ 34.124703] R13: 00007fff13f48960 R14: 00007fff13f48990 R15: 00007fff13f48cf0 [ 34.125567] [ 34.125866] [ 34.126082] Allocated by task 220: [ 34.126512] kasan_save_stack+0x22/0x50 [ 34.127029] kasan_set_track+0x25/0x30 [ 34.127553] __kasan_slab_alloc+0x59/0x70 [ 34.128092] kmem_cache_alloc+0x16b/0x370 [ 34.128630] vm_area_dup+0x20/0x160 [ 34.129092] __split_vma+0x170/0x950 [ 34.129560] split_vma+0xc6/0x110 [ 34.130005] mprotect_fixup+0x8d2/0xb30 [ 34.130507] do_mprotect_pkey+0x87e/0xd40 [ 34.131038] __x64_sys_mprotect+0x78/0xc0 [ 34.131565] do_syscall_64+0x3f/0x90 [ 34.132043] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.132693] [ 34.132907] Freed by task 220: [ 34.133298] kasan_save_stack+0x22/0x50 [ 34.133806] kasan_set_track+0x25/0x30 [ 34.134326] kasan_save_free_info+0x2b/0x50 [ 34.134862] __kasan_slab_free+0x10a/0x190 [ 34.135409] kmem_cache_free+0x10d/0x4d0 [ 34.135919] rcu_core+0x8c8/0x2860 [ 34.136372] __do_softirq+0x1b7/0x7d4 [ 34.136854] [ 34.137072] Last potentially related work creation: [ 34.137666] kasan_save_stack+0x22/0x50 [ 34.138186] __kasan_record_aux_stack+0x8e/0xa0 [ 34.138768] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.139414] remove_vma+0x139/0x170 [ 34.139868] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.140433] do_vmi_munmap+0x1f1/0x2b0 [ 34.140921] __vm_munmap+0x138/0x3a0 [ 34.141387] __x64_sys_munmap+0x59/0x80 [ 34.141893] do_syscall_64+0x3f/0x90 [ 34.142365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.143034] [ 34.143253] The buggy address belongs to the object at ffff888018de8740 [ 34.143253] which belongs to the cache vm_area_struct of size 168 [ 34.144763] The buggy address is located 88 bytes inside of [ 34.144763] freed 168-byte region [ffff888018de8740, ffff888018de87e8) [ 34.146196] [ 34.146413] The buggy address belongs to the physical page: [ 34.147089] page:000000002c1c9bab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18de8 [ 34.148185] memcg:ffff88800cb26d01 [ 34.148617] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.149268] page_type: 0xffffffff() [ 34.149718] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.150649] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb26d01 [ 34.151553] page dumped because: kasan: bad access detected [ 34.152230] [ 34.152452] Memory state around the buggy address: [ 34.153037] ffff888018de8680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.153904] ffff888018de8700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 34.154751] >ffff888018de8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.155612] ^ [ 34.156116] ffff888018de8800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.156970] ffff888018de8880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.157846] ================================================================== [ 34.159060] Disabling lock debugging due to kernel taint [ 36.636145] BUG: Bad rss-counter state mm:00000000fe118100 type:MM_FILEPAGES val:33 [ 36.637529] BUG: Bad rss-counter state mm:00000000fe118100 type:MM_ANONPAGES val:22 [ 37.109770] BUG: Bad rss-counter state mm:00000000648617be type:MM_FILEPAGES val:33 [ 37.110986] BUG: Bad rss-counter state mm:00000000648617be type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16454' (ECDSA) to the list of known hosts. 2023/06/20 00:54:01 fuzzer started 2023/06/20 00:54:01 dialing manager at localhost:44161 2023/06/20 00:54:01 checking machine... 2023/06/20 00:54:01 checking revisions... [ 37.785528] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:54:01 testing simple program... [ 37.841099] cgroup: Unknown subsys name 'net' [ 37.884731] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:53:58 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=00007f3840e02ab0 CR3=000000000c58a000 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=4e9ad0e43cbc199eba42536044d1cbe5 XMM02=2c67c8bc2e329bc3000000000011d9e8 XMM03=fb795ef6d657705600000000001247c8 XMM04=40b95d772dcdd80300000000000ae988 XMM05=16bbfc4fa606b62500000000001343e0 XMM06=3c811faf134d1a430000000000133228 XMM07=e042d86d42eb936e0000000000124a48 XMM08=8fc3d45cc997f7a5000000000011da48 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888015c82540 RBX=ffff88800c7bfb40 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff844bfa6f RDI=0000000000000007 RBP=0000000000000003 RSP=ffff88800c7bf4e0 R8 =0000000000000007 R9 =0000000000000002 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800c7bf5c8 R13=ffff88800c7bfe70 R14=0000000000000000 R15=ffff88800c7bfeaf RIP=ffffffff844bfabf 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 00007f7607c0e900 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=00007f7607bb3008 CR3=0000000018eb2000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000