syzkaller login: [ 61.066968] BUG: Bad rss-counter state mm:000000000b5956ce type:MM_FILEPAGES val:33 [ 61.068212] BUG: Bad rss-counter state mm:000000000b5956ce type:MM_ANONPAGES val:22 [ 61.109777] ================================================================== [ 61.110795] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.111741] Read of size 8 at addr ffff88800fdfa3f8 by task sshd/227 [ 61.112634] [ 61.112852] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.113732] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.114771] Call Trace: [ 61.115094] [ 61.115383] dump_stack_lvl+0x91/0xf0 [ 61.115880] print_report+0xcc/0x620 [ 61.116377] ? __virt_addr_valid+0x102/0x340 [ 61.116944] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.117573] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.118200] kasan_report+0xbe/0xf0 [ 61.118690] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.119323] vma_interval_tree_remove+0xc75/0xec0 [ 61.119931] vma_prepare+0xc54/0x11a0 [ 61.120416] __split_vma+0x5af/0x950 [ 61.120901] ? __pfx___split_vma+0x10/0x10 [ 61.121436] ? find_held_lock+0x2c/0x110 [ 61.121963] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.122546] ? lock_is_held_type+0x9f/0x120 [ 61.123094] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.123698] ? mtree_range_walk+0x632/0x900 [ 61.124257] ? mas_walk+0x5c7/0x7c0 [ 61.124735] do_vmi_munmap+0x1f1/0x2b0 [ 61.125238] mmap_region+0x1f9/0x2660 [ 61.125735] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.126246] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.126982] ? __pfx_lock_acquire+0x10/0x10 [ 61.127523] ? __pfx_mmap_region+0x10/0x10 [ 61.128051] ? security_mmap_addr+0x7d/0xa0 [ 61.128585] ? get_unmapped_area+0x1f5/0x3f0 [ 61.129141] do_mmap+0x854/0xf00 [ 61.129584] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.130079] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.130658] ksys_mmap_pgoff+0x3af/0x500 [ 61.131164] do_syscall_64+0x3f/0x90 [ 61.131658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.132302] RIP: 0033:0x7f91faf30d82 [ 61.132761] 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 [ 61.134891] RSP: 002b:00007ffe74286178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.135816] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f91faf30d82 [ 61.136668] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f91fa36a000 [ 61.137535] RBP: 00007f91fa36a000 R08: 0000000000000009 R09: 0000000000001000 [ 61.138383] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562747ea6f60 [ 61.139265] R13: 00007ffe74286190 R14: 00007ffe742861c0 R15: 00007ffe74286520 [ 61.140142] [ 61.140433] [ 61.140649] Allocated by task 220: [ 61.141078] kasan_save_stack+0x22/0x50 [ 61.141588] kasan_set_track+0x25/0x30 [ 61.142088] __kasan_slab_alloc+0x59/0x70 [ 61.142634] kmem_cache_alloc+0x16b/0x370 [ 61.143152] vm_area_dup+0x20/0x160 [ 61.143606] __split_vma+0x170/0x950 [ 61.144077] split_vma+0xc6/0x110 [ 61.144519] mprotect_fixup+0x8d2/0xb30 [ 61.145051] do_mprotect_pkey+0x87e/0xd40 [ 61.145607] __x64_sys_mprotect+0x78/0xc0 [ 61.146152] do_syscall_64+0x3f/0x90 [ 61.146656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.147337] [ 61.147565] Freed by task 220: [ 61.147980] kasan_save_stack+0x22/0x50 [ 61.148520] kasan_set_track+0x25/0x30 [ 61.149045] kasan_save_free_info+0x2b/0x50 [ 61.149615] __kasan_slab_free+0x10a/0x190 [ 61.150172] kmem_cache_free+0x10d/0x4d0 [ 61.150732] rcu_core+0x8c8/0x2860 [ 61.151205] __do_softirq+0x1b7/0x7d4 [ 61.151714] [ 61.151937] Last potentially related work creation: [ 61.152553] kasan_save_stack+0x22/0x50 [ 61.153098] __kasan_record_aux_stack+0x8e/0xa0 [ 61.153702] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.154373] remove_vma+0x139/0x170 [ 61.154861] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.155448] do_vmi_munmap+0x1f1/0x2b0 [ 61.155966] __vm_munmap+0x138/0x3a0 [ 61.156456] __x64_sys_munmap+0x59/0x80 [ 61.156977] do_syscall_64+0x3f/0x90 [ 61.157481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.158167] [ 61.158389] The buggy address belongs to the object at ffff88800fdfa3a0 [ 61.158389] which belongs to the cache vm_area_struct of size 168 [ 61.159978] The buggy address is located 88 bytes inside of [ 61.159978] freed 168-byte region [ffff88800fdfa3a0, ffff88800fdfa448) [ 61.161467] [ 61.161695] The buggy address belongs to the physical page: [ 61.162405] page:00000000ba665add refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdfa [ 61.163576] memcg:ffff8880069dca01 [ 61.164025] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.164704] page_type: 0xffffffff() [ 61.165179] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.166161] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880069dca01 [ 61.167130] page dumped because: kasan: bad access detected [ 61.167832] [ 61.168061] Memory state around the buggy address: [ 61.168681] ffff88800fdfa280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 61.169598] ffff88800fdfa300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 61.170528] >ffff88800fdfa380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 61.171437] ^ [ 61.172326] ffff88800fdfa400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 61.173225] ffff88800fdfa480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.174128] ================================================================== [ 61.175469] Disabling lock debugging due to kernel taint [ 63.886492] BUG: Bad rss-counter state mm:0000000096f0383c type:MM_FILEPAGES val:33 [ 63.887368] BUG: Bad rss-counter state mm:0000000096f0383c type:MM_ANONPAGES val:22 [ 64.330516] BUG: Bad rss-counter state mm:00000000998cb18d type:MM_FILEPAGES val:33 [ 64.331795] BUG: Bad rss-counter state mm:00000000998cb18d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63673' (ECDSA) to the list of known hosts. 2023/06/20 13:48:11 fuzzer started 2023/06/20 13:48:11 dialing manager at localhost:36067 2023/06/20 13:48:11 checking machine... 2023/06/20 13:48:11 checking revisions... [ 65.002669] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:48:12 testing simple program... [ 65.050972] cgroup: Unknown subsys name 'net' [ 65.120368] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:48:11 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8614e5e8 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88801b76fb08 RSP=ffff88801b76fa40 R8 =ffffffff8614e5ec R9 =ffff88801b76faf0 R10=0000000000038001 R11=00000000000246c8 R12=ffff88801b76fb10 R13=ffff88801b76faf8 R14=ffff88801b76fdc0 R15=ffff88801b76fab0 RIP=ffffffff81130bb0 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 00007ff01f29f900 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=00007ff01f854650 CR3=0000000019c46000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88801b76ff28 RSI=ffff88801b76fef0 RDI=ffff88801b76f828 RBP=ffff88801b76f8c0 RSP=ffff88801b76f820 R8 =0000000000000001 R9 =ffff88801b76f868 R10=0000000000038001 R11=000000000008a966 R12=ffff88801b76f8f0 R13=0000000000000000 R14=ffff888016f9b680 R15=0000000000092cc0 RIP=ffffffff81130340 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 00007ff01f29f900 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=00007ff01f8570b0 CR3=0000000019c46000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000