syzkaller login: [ 38.901287] BUG: Bad rss-counter state mm:000000004e1ceeda type:MM_FILEPAGES val:33 [ 38.903198] BUG: Bad rss-counter state mm:000000004e1ceeda type:MM_ANONPAGES val:22 [ 39.091499] ================================================================== [ 39.092471] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.093463] Read of size 8 at addr ffff88800e588058 by task sshd/225 [ 39.094352] [ 39.094581] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.095481] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.096558] Call Trace: [ 39.096903] [ 39.097209] dump_stack_lvl+0x91/0xf0 [ 39.097735] print_report+0xcc/0x620 [ 39.098243] ? __virt_addr_valid+0x102/0x340 [ 39.098822] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.099475] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.100109] kasan_report+0xbe/0xf0 [ 39.100615] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.101261] vma_interval_tree_remove+0xc75/0xec0 [ 39.101893] vma_prepare+0xc54/0x11a0 [ 39.102395] __split_vma+0x5af/0x950 [ 39.102881] ? __pfx___split_vma+0x10/0x10 [ 39.103439] ? find_held_lock+0x2c/0x110 [ 39.103980] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.104582] ? lock_is_held_type+0x9f/0x120 [ 39.105140] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.105780] ? mtree_range_walk+0x632/0x900 [ 39.106358] ? mas_walk+0x5c7/0x7c0 [ 39.106849] do_vmi_munmap+0x1f1/0x2b0 [ 39.107370] mmap_region+0x1f9/0x2660 [ 39.107870] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.108401] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.109176] ? __pfx_lock_acquire+0x10/0x10 [ 39.109728] ? __pfx_mmap_region+0x10/0x10 [ 39.110286] ? security_mmap_addr+0x7d/0xa0 [ 39.110834] ? get_unmapped_area+0x1f5/0x3f0 [ 39.111409] do_mmap+0x854/0xf00 [ 39.111860] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.112367] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.112955] ksys_mmap_pgoff+0x3af/0x500 [ 39.113479] do_syscall_64+0x3f/0x90 [ 39.113978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.114651] RIP: 0033:0x7f3b25634d82 [ 39.115128] 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 [ 39.117370] RSP: 002b:00007ffd40762708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.118315] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3b25634d82 [ 39.119191] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3b24a6e000 [ 39.120073] RBP: 00007f3b24a6e000 R08: 0000000000000009 R09: 0000000000001000 [ 39.120984] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e9b213dec0 [ 39.121860] R13: 00007ffd40762720 R14: 00007ffd40762750 R15: 00007ffd40762ab0 [ 39.122755] [ 39.123058] [ 39.123276] Allocated by task 218: [ 39.123724] kasan_save_stack+0x22/0x50 [ 39.124249] kasan_set_track+0x25/0x30 [ 39.124767] __kasan_slab_alloc+0x59/0x70 [ 39.125313] kmem_cache_alloc+0x16b/0x370 [ 39.125853] vm_area_dup+0x20/0x160 [ 39.126322] __split_vma+0x170/0x950 [ 39.126811] split_vma+0xc6/0x110 [ 39.127260] mprotect_fixup+0x8d2/0xb30 [ 39.127759] do_mprotect_pkey+0x87e/0xd40 [ 39.128278] __x64_sys_mprotect+0x78/0xc0 [ 39.128842] do_syscall_64+0x3f/0x90 [ 39.129329] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.130001] [ 39.130219] Freed by task 218: [ 39.130626] kasan_save_stack+0x22/0x50 [ 39.131156] kasan_set_track+0x25/0x30 [ 39.131675] kasan_save_free_info+0x2b/0x50 [ 39.132233] __kasan_slab_free+0x10a/0x190 [ 39.132808] kmem_cache_free+0x10d/0x4d0 [ 39.133328] rcu_core+0x8c8/0x2860 [ 39.133784] __do_softirq+0x1b7/0x7d4 [ 39.134287] [ 39.134500] Last potentially related work creation: [ 39.135099] kasan_save_stack+0x22/0x50 [ 39.135622] __kasan_record_aux_stack+0x8e/0xa0 [ 39.136213] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.136889] remove_vma+0x139/0x170 [ 39.137361] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.137920] do_vmi_munmap+0x1f1/0x2b0 [ 39.138415] __vm_munmap+0x138/0x3a0 [ 39.138899] __x64_sys_munmap+0x59/0x80 [ 39.139402] do_syscall_64+0x3f/0x90 [ 39.139891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.140565] [ 39.140795] The buggy address belongs to the object at ffff88800e588000 [ 39.140795] which belongs to the cache vm_area_struct of size 168 [ 39.142331] The buggy address is located 88 bytes inside of [ 39.142331] freed 168-byte region [ffff88800e588000, ffff88800e5880a8) [ 39.143766] [ 39.143988] The buggy address belongs to the physical page: [ 39.144680] page:00000000f77c9798 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe588 [ 39.145770] memcg:ffff88800df6dc01 [ 39.146208] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.146915] page_type: 0xffffffff() [ 39.147380] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 39.148321] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df6dc01 [ 39.149371] page dumped because: kasan: bad access detected [ 39.150148] [ 39.150400] Memory state around the buggy address: [ 39.151083] ffff88800e587f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.152074] ffff88800e587f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.153090] >ffff88800e588000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.154091] ^ [ 39.154947] ffff88800e588080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 39.155953] ffff88800e588100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.156972] ================================================================== [ 39.158198] Disabling lock debugging due to kernel taint [ 41.177029] BUG: Bad rss-counter state mm:000000005e874b88 type:MM_FILEPAGES val:33 [ 41.177715] BUG: Bad rss-counter state mm:000000005e874b88 type:MM_ANONPAGES val:22 [ 41.557056] BUG: Bad rss-counter state mm:0000000064183118 type:MM_FILEPAGES val:33 [ 41.558426] BUG: Bad rss-counter state mm:0000000064183118 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51429' (ECDSA) to the list of known hosts. 2023/06/20 13:00:24 fuzzer started 2023/06/20 13:00:24 dialing manager at localhost:36067 2023/06/20 13:00:24 checking machine... 2023/06/20 13:00:24 checking revisions... [ 42.252710] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:00:24 testing simple program... [ 42.305129] cgroup: Unknown subsys name 'net' [ 42.366676] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:00:24 Registers: info registers vcpu 0 RAX=ffffffff810bd033 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801976f201 RSI=ffff88801976f250 RDI=ffff88801976f250 RBP=ffff88801976f2b0 RSP=ffff88801976f198 R8 =ffffffff86098096 R9 =ffff88801976f298 R10=0000000000038001 R11=0000000000006097 R12=ffff88801976f2b8 R13=ffff88801976f2a0 R14=ffff88801976f258 R15=ffff88801976f258 RIP=ffffffff81131041 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 00007f6179163900 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=00007ffeb14d9000 CR3=00000000164ee000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007fc3cd1c5000 CR3=000000000975a000 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=3f807fb874c5ca97e7498aef40492965 XMM02=2c67c8bc2e329bc3000000000011c2b8 XMM03=fb795ef6d657705600000000001224c0 XMM04=a9b3867b3b6fd00a00000000000ae988 XMM05=6a9742bd16e89c4e0000000000133878 XMM06=e8008b1642ea3e600000000000132918 XMM07=e042d86d42eb936e0000000000122740 XMM08=249556347c04bc81000000000011c318 XMM09=00000000000000000000000000000000 XMM10=00000000002000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000