syzkaller login: [ 44.978419] BUG: Bad rss-counter state mm:00000000359caae0 type:MM_FILEPAGES val:33 [ 44.979620] BUG: Bad rss-counter state mm:00000000359caae0 type:MM_ANONPAGES val:22 [ 45.137694] ================================================================== [ 45.138701] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.139703] Read of size 8 at addr ffff888019a88968 by task sshd/220 [ 45.140684] [ 45.140910] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.141822] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.142887] Call Trace: [ 45.143215] [ 45.143514] dump_stack_lvl+0x91/0xf0 [ 45.144039] print_report+0xcc/0x620 [ 45.144535] ? __virt_addr_valid+0x102/0x340 [ 45.145125] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.145762] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.146416] kasan_report+0xbe/0xf0 [ 45.146921] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.147550] vma_interval_tree_remove+0xc75/0xec0 [ 45.148230] vma_prepare+0xc54/0x11a0 [ 45.148762] __split_vma+0x5af/0x950 [ 45.149269] ? __pfx___split_vma+0x10/0x10 [ 45.149825] ? find_held_lock+0x2c/0x110 [ 45.150385] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.150994] ? lock_is_held_type+0x9f/0x120 [ 45.151564] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.152237] ? mtree_range_walk+0x632/0x900 [ 45.152805] ? mas_walk+0x5c7/0x7c0 [ 45.153285] do_vmi_munmap+0x1f1/0x2b0 [ 45.153796] mmap_region+0x1f9/0x2660 [ 45.154299] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.154836] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.155554] ? __pfx_lock_acquire+0x10/0x10 [ 45.156115] ? __pfx_mmap_region+0x10/0x10 [ 45.156654] ? security_mmap_addr+0x7d/0xa0 [ 45.157237] ? get_unmapped_area+0x1f5/0x3f0 [ 45.157823] do_mmap+0x854/0xf00 [ 45.158298] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.158813] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.159380] ksys_mmap_pgoff+0x3af/0x500 [ 45.159920] do_syscall_64+0x3f/0x90 [ 45.160406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.161073] RIP: 0033:0x7f4a487fed82 [ 45.161537] 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 [ 45.163760] RSP: 002b:00007ffc5286c678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.164692] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4a487fed82 [ 45.165566] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4a47c38000 [ 45.166467] RBP: 00007f4a47c38000 R08: 0000000000000009 R09: 0000000000001000 [ 45.167456] R10: 0000000000000812 R11: 0000000000000206 R12: 000055da84542ec0 [ 45.168356] R13: 00007ffc5286c690 R14: 00007ffc5286c6c0 R15: 00007ffc5286ca20 [ 45.169250] [ 45.169549] [ 45.169779] Allocated by task 212: [ 45.170230] kasan_save_stack+0x22/0x50 [ 45.170770] kasan_set_track+0x25/0x30 [ 45.171282] __kasan_slab_alloc+0x59/0x70 [ 45.171854] kmem_cache_alloc+0x16b/0x370 [ 45.172400] vm_area_dup+0x20/0x160 [ 45.172874] __split_vma+0x170/0x950 [ 45.173357] split_vma+0xc6/0x110 [ 45.173823] mprotect_fixup+0x8d2/0xb30 [ 45.174376] do_mprotect_pkey+0x87e/0xd40 [ 45.174930] __x64_sys_mprotect+0x78/0xc0 [ 45.175470] do_syscall_64+0x3f/0x90 [ 45.175982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.176656] [ 45.176889] Freed by task 13: [ 45.177281] kasan_save_stack+0x22/0x50 [ 45.177817] kasan_set_track+0x25/0x30 [ 45.178342] kasan_save_free_info+0x2b/0x50 [ 45.178907] __kasan_slab_free+0x10a/0x190 [ 45.179446] kmem_cache_free+0x10d/0x4d0 [ 45.180001] rcu_core+0x8c8/0x2860 [ 45.180455] __do_softirq+0x1b7/0x7d4 [ 45.180950] [ 45.181171] Last potentially related work creation: [ 45.181782] kasan_save_stack+0x22/0x50 [ 45.182318] __kasan_record_aux_stack+0x8e/0xa0 [ 45.182929] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.183585] remove_vma+0x139/0x170 [ 45.184081] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.184656] do_vmi_munmap+0x1f1/0x2b0 [ 45.185170] __vm_munmap+0x138/0x3a0 [ 45.185649] __x64_sys_munmap+0x59/0x80 [ 45.186218] do_syscall_64+0x3f/0x90 [ 45.186718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.187389] [ 45.187608] The buggy address belongs to the object at ffff888019a88910 [ 45.187608] which belongs to the cache vm_area_struct of size 168 [ 45.189143] The buggy address is located 88 bytes inside of [ 45.189143] freed 168-byte region [ffff888019a88910, ffff888019a889b8) [ 45.190595] [ 45.190828] The buggy address belongs to the physical page: [ 45.191490] page:000000001ab02b86 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19a88 [ 45.192637] memcg:ffff888019a87101 [ 45.193087] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.193776] page_type: 0xffffffff() [ 45.194247] raw: 0100000000000200 ffff88800879fc80 ffffea000066a000 0000000000000008 [ 45.195195] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019a87101 [ 45.196138] page dumped because: kasan: bad access detected [ 45.196823] [ 45.197046] Memory state around the buggy address: [ 45.197637] ffff888019a88800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 45.198538] ffff888019a88880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 45.199421] >ffff888019a88900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.200311] ^ [ 45.201141] ffff888019a88980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 45.202037] ffff888019a88a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.202935] ================================================================== [ 45.204192] Disabling lock debugging due to kernel taint [ 47.331343] BUG: Bad rss-counter state mm:00000000f8cebbdb type:MM_FILEPAGES val:33 [ 47.332374] BUG: Bad rss-counter state mm:00000000f8cebbdb type:MM_ANONPAGES val:22 [ 47.786219] BUG: Bad rss-counter state mm:00000000762da92d type:MM_FILEPAGES val:33 [ 47.787402] BUG: Bad rss-counter state mm:00000000762da92d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19508' (ECDSA) to the list of known hosts. 2023/06/19 19:51:52 fuzzer started 2023/06/19 19:51:52 dialing manager at localhost:44161 2023/06/19 19:51:52 checking machine... 2023/06/19 19:51:52 checking revisions... [ 48.461929] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:51:52 testing simple program... [ 48.502234] cgroup: Unknown subsys name 'net' [ 48.549159] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:51:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11002fb4ed0 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff888017da7668 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0030733a745f6c65 R12=0000000000000000 R13=0000000000000000 R14=ffff88800b3ac0a8 R15=0000000000000000 RIP=ffffffff8180fd28 RFL=00000056 [---ZAP-] 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 00007f1d20e9e700 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=00007f2b53b846f0 CR3=000000000e586000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732031353a3135 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303035 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f5f9db65008 CR3=000000000e586000 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=2031353a31353a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a31353a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000