syzkaller login: [ 30.978034] BUG: Bad rss-counter state mm:000000009c10f76a type:MM_FILEPAGES val:33 [ 30.979041] BUG: Bad rss-counter state mm:000000009c10f76a type:MM_ANONPAGES val:22 [ 31.131290] ================================================================== [ 31.132399] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.133522] Read of size 8 at addr ffff88800e9596b0 by task sshd/221 [ 31.134601] [ 31.134847] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.135761] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.136810] Call Trace: [ 31.137153] [ 31.137456] dump_stack_lvl+0x91/0xf0 [ 31.137980] print_report+0xcc/0x620 [ 31.138495] ? __virt_addr_valid+0x102/0x340 [ 31.139100] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.139757] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.140415] kasan_report+0xbe/0xf0 [ 31.140931] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.141620] vma_interval_tree_remove+0xc75/0xec0 [ 31.142296] vma_prepare+0xc54/0x11a0 [ 31.142843] __split_vma+0x5af/0x950 [ 31.143369] ? __pfx___split_vma+0x10/0x10 [ 31.143955] ? find_held_lock+0x2c/0x110 [ 31.144531] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.145156] ? lock_is_held_type+0x9f/0x120 [ 31.145754] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.146426] ? mtree_range_walk+0x632/0x900 [ 31.147045] ? mas_walk+0x5c7/0x7c0 [ 31.147573] do_vmi_munmap+0x1f1/0x2b0 [ 31.148115] mmap_region+0x1f9/0x2660 [ 31.148650] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.149221] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.150012] ? __pfx_lock_acquire+0x10/0x10 [ 31.150611] ? __pfx_mmap_region+0x10/0x10 [ 31.151200] ? security_mmap_addr+0x7d/0xa0 [ 31.151791] ? get_unmapped_area+0x1f5/0x3f0 [ 31.152400] do_mmap+0x854/0xf00 [ 31.152886] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.153437] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.154062] ksys_mmap_pgoff+0x3af/0x500 [ 31.154648] do_syscall_64+0x3f/0x90 [ 31.155183] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.155898] RIP: 0033:0x7f54c17dbd82 [ 31.156408] 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 [ 31.158783] RSP: 002b:00007ffe17daf198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.159787] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f54c17dbd82 [ 31.160728] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f54c0c15000 [ 31.161666] RBP: 00007f54c0c15000 R08: 0000000000000009 R09: 0000000000001000 [ 31.162623] R10: 0000000000000812 R11: 0000000000000206 R12: 00005647845dfd90 [ 31.163566] R13: 00007ffe17daf1b0 R14: 00007ffe17daf1e0 R15: 00007ffe17daf540 [ 31.164525] [ 31.164850] [ 31.165090] Allocated by task 214: [ 31.165563] kasan_save_stack+0x22/0x50 [ 31.166122] kasan_set_track+0x25/0x30 [ 31.166681] __kasan_slab_alloc+0x59/0x70 [ 31.167262] kmem_cache_alloc+0x16b/0x370 [ 31.167835] vm_area_dup+0x20/0x160 [ 31.168344] __split_vma+0x170/0x950 [ 31.168861] split_vma+0xc6/0x110 [ 31.169346] mprotect_fixup+0x8d2/0xb30 [ 31.169899] do_mprotect_pkey+0x87e/0xd40 [ 31.170473] __x64_sys_mprotect+0x78/0xc0 [ 31.171080] do_syscall_64+0x3f/0x90 [ 31.171610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.172324] [ 31.172562] Freed by task 214: [ 31.173001] kasan_save_stack+0x22/0x50 [ 31.173558] kasan_set_track+0x25/0x30 [ 31.174104] kasan_save_free_info+0x2b/0x50 [ 31.174708] __kasan_slab_free+0x10a/0x190 [ 31.175374] kmem_cache_free+0x10d/0x4d0 [ 31.175952] rcu_core+0x8c8/0x2860 [ 31.176445] __do_softirq+0x1b7/0x7d4 [ 31.176977] [ 31.177221] Last potentially related work creation: [ 31.177861] kasan_save_stack+0x22/0x50 [ 31.178415] __kasan_record_aux_stack+0x8e/0xa0 [ 31.179069] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.179781] remove_vma+0x139/0x170 [ 31.180276] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.180899] do_vmi_munmap+0x1f1/0x2b0 [ 31.181440] __vm_munmap+0x138/0x3a0 [ 31.181959] __x64_sys_munmap+0x59/0x80 [ 31.182520] do_syscall_64+0x3f/0x90 [ 31.183056] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.183763] [ 31.184003] The buggy address belongs to the object at ffff88800e959658 [ 31.184003] which belongs to the cache vm_area_struct of size 168 [ 31.185634] The buggy address is located 88 bytes inside of [ 31.185634] freed 168-byte region [ffff88800e959658, ffff88800e959700) [ 31.187180] [ 31.187427] The buggy address belongs to the physical page: [ 31.188157] page:000000008d83f192 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe959 [ 31.189315] memcg:ffff88800ff60a01 [ 31.189768] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.190460] page_type: 0xffffffff() [ 31.190958] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.191941] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ff60a01 [ 31.192905] page dumped because: kasan: bad access detected [ 31.193622] [ 31.193855] Memory state around the buggy address: [ 31.194477] ffff88800e959580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.195414] ffff88800e959600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.196350] >ffff88800e959680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.197298] ^ [ 31.197944] ffff88800e959700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.198913] ffff88800e959780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.199861] ================================================================== [ 31.200953] Disabling lock debugging due to kernel taint [ 33.732228] BUG: Bad rss-counter state mm:00000000ed03066e type:MM_FILEPAGES val:33 [ 33.733379] BUG: Bad rss-counter state mm:00000000ed03066e type:MM_ANONPAGES val:22 [ 34.186985] BUG: Bad rss-counter state mm:00000000b057b290 type:MM_FILEPAGES val:33 [ 34.188263] BUG: Bad rss-counter state mm:00000000b057b290 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26474' (ECDSA) to the list of known hosts. 2023/06/21 00:35:40 fuzzer started 2023/06/21 00:35:40 dialing manager at localhost:36067 2023/06/21 00:35:40 checking machine... 2023/06/21 00:35:40 checking revisions... [ 34.892059] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:35:40 testing simple program... [ 34.932795] cgroup: Unknown subsys name 'net' [ 34.979141] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:35:39 Registers: info registers vcpu 0 RAX=ffffffff8180ce89 RBX=0000000000000001 RCX=ffffffff86138e01 RDX=ffff8880147472d0 RSI=ffffffff8180ce89 RDI=ffff888014747288 RBP=ffff8880147472e0 RSP=ffff888014747218 R8 =ffffffff86138eb4 R9 =ffff8880147472c8 R10=0000000000038001 R11=0000000000020d9c R12=ffff888014747350 R13=ffff8880147472d0 R14=ffff88801455b680 R15=ffff888014747288 RIP=ffffffff81130641 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 00007f4823a92900 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=000055cc4bbef748 CR3=000000000cb74000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=3da8ae5561d4940b00000000000ae988 XMM05=291bb3c7f7d32f540000000000132710 XMM06=c291bd5c70af25b900000000001317b0 XMM07=fb795ef6d65770560000000000121a58 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864131dc RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888015e9fab8 RSP=ffff888015e9f9f0 R8 =ffffffff864131e0 R9 =ffff888015e9faa0 R10=0000000000038001 R11=000000000009a8ce R12=ffff888015e9fac0 R13=ffff888015e9faa8 R14=0000000000000005 R15=ffff888015e9fa60 RIP=ffffffff81130b2b RFL=00000297 [--S-APC] 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 00007f5a8d699900 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=00007f5a8dc4e650 CR3=0000000018ffc000 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=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