syzkaller login: [ 30.982049] BUG: Bad rss-counter state mm:000000003aa767cc type:MM_FILEPAGES val:33 [ 30.983165] BUG: Bad rss-counter state mm:000000003aa767cc type:MM_ANONPAGES val:22 [ 31.156242] ================================================================== [ 31.157395] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.158475] Read of size 8 at addr ffff88801bc645c8 by task sshd/220 [ 31.159327] [ 31.159558] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.160786] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.161898] Call Trace: [ 31.162316] [ 31.162691] dump_stack_lvl+0x91/0xf0 [ 31.163218] print_report+0xcc/0x620 [ 31.163709] ? __virt_addr_valid+0x102/0x340 [ 31.164283] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.165056] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.165774] kasan_report+0xbe/0xf0 [ 31.166305] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.167121] vma_interval_tree_remove+0xc75/0xec0 [ 31.167795] vma_prepare+0xc54/0x11a0 [ 31.168359] __split_vma+0x5af/0x950 [ 31.168888] ? __pfx___split_vma+0x10/0x10 [ 31.169615] ? find_held_lock+0x2c/0x110 [ 31.170283] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.171028] ? lock_is_held_type+0x9f/0x120 [ 31.171774] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.172496] ? mtree_range_walk+0x632/0x900 [ 31.173060] ? mas_walk+0x5c7/0x7c0 [ 31.173681] do_vmi_munmap+0x1f1/0x2b0 [ 31.174372] mmap_region+0x1f9/0x2660 [ 31.174860] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.175540] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.176485] ? __pfx_lock_acquire+0x10/0x10 [ 31.177108] ? __pfx_mmap_region+0x10/0x10 [ 31.177814] ? security_mmap_addr+0x7d/0xa0 [ 31.178420] ? get_unmapped_area+0x1f5/0x3f0 [ 31.178990] do_mmap+0x854/0xf00 [ 31.179611] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.180312] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.180912] ksys_mmap_pgoff+0x3af/0x500 [ 31.181522] do_syscall_64+0x3f/0x90 [ 31.182157] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.182865] RIP: 0033:0x7f0eeba00d82 [ 31.183373] 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 [ 31.185898] RSP: 002b:00007ffdf84592f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.187037] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0eeba00d82 [ 31.188052] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0eeae3a000 [ 31.189015] RBP: 00007f0eeae3a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.190009] R10: 0000000000000812 R11: 0000000000000206 R12: 00005598e3a7dec0 [ 31.191070] R13: 00007ffdf8459310 R14: 00007ffdf8459340 R15: 00007ffdf84596a0 [ 31.192281] [ 31.192640] [ 31.192867] Allocated by task 213: [ 31.193339] kasan_save_stack+0x22/0x50 [ 31.194039] kasan_set_track+0x25/0x30 [ 31.194719] __kasan_slab_alloc+0x59/0x70 [ 31.195339] kmem_cache_alloc+0x16b/0x370 [ 31.196040] vm_area_dup+0x20/0x160 [ 31.196693] __split_vma+0x170/0x950 [ 31.197210] split_vma+0xc6/0x110 [ 31.197714] mprotect_fixup+0x8d2/0xb30 [ 31.198474] do_mprotect_pkey+0x87e/0xd40 [ 31.199121] __x64_sys_mprotect+0x78/0xc0 [ 31.199755] do_syscall_64+0x3f/0x90 [ 31.200446] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.201309] [ 31.201542] Freed by task 213: [ 31.201958] kasan_save_stack+0x22/0x50 [ 31.202597] kasan_set_track+0x25/0x30 [ 31.203307] kasan_save_free_info+0x2b/0x50 [ 31.203891] __kasan_slab_free+0x10a/0x190 [ 31.204705] kmem_cache_free+0x10d/0x4d0 [ 31.205373] rcu_core+0x8c8/0x2860 [ 31.205856] __do_softirq+0x1b7/0x7d4 [ 31.206515] [ 31.206818] Last potentially related work creation: [ 31.207560] kasan_save_stack+0x22/0x50 [ 31.208202] __kasan_record_aux_stack+0x8e/0xa0 [ 31.209061] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.209768] remove_vma+0x139/0x170 [ 31.210291] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.211037] do_vmi_munmap+0x1f1/0x2b0 [ 31.211772] __vm_munmap+0x138/0x3a0 [ 31.212361] __x64_sys_munmap+0x59/0x80 [ 31.213064] do_syscall_64+0x3f/0x90 [ 31.213684] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.214450] [ 31.214755] The buggy address belongs to the object at ffff88801bc64570 [ 31.214755] which belongs to the cache vm_area_struct of size 168 [ 31.216723] The buggy address is located 88 bytes inside of [ 31.216723] freed 168-byte region [ffff88801bc64570, ffff88801bc64618) [ 31.218504] [ 31.218735] The buggy address belongs to the physical page: [ 31.219703] page:00000000b8c783b7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc64 [ 31.221050] memcg:ffff88801bc65001 [ 31.221658] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.222475] page_type: 0xffffffff() [ 31.222983] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.224295] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc65001 [ 31.225264] page dumped because: kasan: bad access detected [ 31.225970] [ 31.226200] Memory state around the buggy address: [ 31.226820] ffff88801bc64480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.227778] ffff88801bc64500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.228801] >ffff88801bc64580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.229716] ^ [ 31.230467] ffff88801bc64600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.231405] ffff88801bc64680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.232338] ================================================================== [ 31.233412] Disabling lock debugging due to kernel taint [ 33.183594] BUG: Bad rss-counter state mm:00000000a8c5fdd6 type:MM_FILEPAGES val:33 [ 33.184636] BUG: Bad rss-counter state mm:00000000a8c5fdd6 type:MM_ANONPAGES val:22 [ 33.631038] BUG: Bad rss-counter state mm:0000000002b4724e type:MM_FILEPAGES val:33 [ 33.632173] BUG: Bad rss-counter state mm:0000000002b4724e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60514' (ECDSA) to the list of known hosts. 2023/06/20 12:31:19 fuzzer started 2023/06/20 12:31:19 dialing manager at localhost:36067 2023/06/20 12:31:19 checking machine... 2023/06/20 12:31:19 checking revisions... [ 34.328796] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:31:19 testing simple program... [ 34.372741] cgroup: Unknown subsys name 'net' [ 34.415387] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:31:18 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b39e0 RDX=1ffff11002b69f3d RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888015b4f9f8 RSP=ffff888015b4f930 R8 =ffffffff863b39e4 R9 =ffff888015b4f9e0 R10=0000000000038001 R11=000000000008aa1d R12=ffff888015b4fa00 R13=ffff888015b4f9e8 R14=0000000000000005 R15=ffff888015b4f9a0 RIP=ffffffff81130b54 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 00007f7f9a068900 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=00007f7f9a61d650 CR3=000000000e4fa000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007fffb5eb1fd8 CR3=000000000c530000 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=2038313a31333a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a31333a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000