syzkaller login: [ 30.953940] BUG: Bad rss-counter state mm:000000007dead06c type:MM_FILEPAGES val:33 [ 30.955411] BUG: Bad rss-counter state mm:000000007dead06c type:MM_ANONPAGES val:22 [ 31.116668] ================================================================== [ 31.117583] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.118544] Read of size 8 at addr ffff888009a25d08 by task sshd/218 [ 31.119334] [ 31.119562] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.120577] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.121588] Call Trace: [ 31.121930] [ 31.122222] dump_stack_lvl+0x91/0xf0 [ 31.122719] print_report+0xcc/0x620 [ 31.123210] ? __virt_addr_valid+0x102/0x340 [ 31.123771] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.124400] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.125021] kasan_report+0xbe/0xf0 [ 31.125498] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.126142] vma_interval_tree_remove+0xc75/0xec0 [ 31.126750] vma_prepare+0xc54/0x11a0 [ 31.127237] __split_vma+0x5af/0x950 [ 31.127719] ? __pfx___split_vma+0x10/0x10 [ 31.128252] ? find_held_lock+0x2c/0x110 [ 31.128780] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.129351] ? lock_is_held_type+0x9f/0x120 [ 31.129906] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.130523] ? mtree_range_walk+0x632/0x900 [ 31.131080] ? mas_walk+0x5c7/0x7c0 [ 31.131559] do_vmi_munmap+0x1f1/0x2b0 [ 31.132061] mmap_region+0x1f9/0x2660 [ 31.132543] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.133055] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.133779] ? __pfx_lock_acquire+0x10/0x10 [ 31.134306] ? __pfx_mmap_region+0x10/0x10 [ 31.134844] ? security_mmap_addr+0x7d/0xa0 [ 31.135387] ? get_unmapped_area+0x1f5/0x3f0 [ 31.135942] do_mmap+0x854/0xf00 [ 31.136382] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.136880] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.137445] ksys_mmap_pgoff+0x3af/0x500 [ 31.137980] do_syscall_64+0x3f/0x90 [ 31.138472] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.139117] RIP: 0033:0x7f5badb5ad82 [ 31.139573] 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 [ 31.141721] RSP: 002b:00007fffdd5ccac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.142649] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5badb5ad82 [ 31.143505] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5bacf94000 [ 31.144359] RBP: 00007f5bacf94000 R08: 0000000000000009 R09: 0000000000001000 [ 31.145207] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c881349f70 [ 31.146070] R13: 00007fffdd5ccae0 R14: 00007fffdd5ccb10 R15: 00007fffdd5cce70 [ 31.146924] [ 31.147220] [ 31.147434] Allocated by task 211: [ 31.147867] kasan_save_stack+0x22/0x50 [ 31.148373] kasan_set_track+0x25/0x30 [ 31.148872] __kasan_slab_alloc+0x59/0x70 [ 31.149401] kmem_cache_alloc+0x16b/0x370 [ 31.149928] vm_area_dup+0x20/0x160 [ 31.150378] __split_vma+0x170/0x950 [ 31.150847] split_vma+0xc6/0x110 [ 31.151287] mprotect_fixup+0x8d2/0xb30 [ 31.151796] do_mprotect_pkey+0x87e/0xd40 [ 31.152319] __x64_sys_mprotect+0x78/0xc0 [ 31.152839] do_syscall_64+0x3f/0x90 [ 31.153321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.153976] [ 31.154193] Freed by task 211: [ 31.154598] kasan_save_stack+0x22/0x50 [ 31.155106] kasan_set_track+0x25/0x30 [ 31.155594] kasan_save_free_info+0x2b/0x50 [ 31.156125] __kasan_slab_free+0x10a/0x190 [ 31.156656] kmem_cache_free+0x10d/0x4d0 [ 31.157173] rcu_core+0x8c8/0x2860 [ 31.157623] __do_softirq+0x1b7/0x7d4 [ 31.158119] [ 31.158335] Last potentially related work creation: [ 31.158939] kasan_save_stack+0x22/0x50 [ 31.159459] __kasan_record_aux_stack+0x8e/0xa0 [ 31.160059] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.160787] remove_vma+0x139/0x170 [ 31.161263] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.161848] do_vmi_munmap+0x1f1/0x2b0 [ 31.162358] __vm_munmap+0x138/0x3a0 [ 31.162842] __x64_sys_munmap+0x59/0x80 [ 31.163362] do_syscall_64+0x3f/0x90 [ 31.163860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.164542] [ 31.164767] Second to last potentially related work creation: [ 31.165485] kasan_save_stack+0x22/0x50 [ 31.166012] __kasan_record_aux_stack+0x8e/0xa0 [ 31.166611] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.167286] remove_vma+0x139/0x170 [ 31.167761] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.168346] do_vmi_munmap+0x1f1/0x2b0 [ 31.168851] mmap_region+0x1f9/0x2660 [ 31.169341] do_mmap+0x854/0xf00 [ 31.169803] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.170312] ksys_mmap_pgoff+0x3af/0x500 [ 31.170838] do_syscall_64+0x3f/0x90 [ 31.171336] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.172005] [ 31.172227] The buggy address belongs to the object at ffff888009a25cb0 [ 31.172227] which belongs to the cache vm_area_struct of size 168 [ 31.173774] The buggy address is located 88 bytes inside of [ 31.173774] freed 168-byte region [ffff888009a25cb0, ffff888009a25d58) [ 31.175258] [ 31.175483] The buggy address belongs to the physical page: [ 31.176175] page:00000000e39c82a4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a25 [ 31.177313] memcg:ffff88800ee59701 [ 31.177777] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.178509] page_type: 0xffffffff() [ 31.178982] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.179944] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee59701 [ 31.180900] page dumped because: kasan: bad access detected [ 31.181593] [ 31.181825] Memory state around the buggy address: [ 31.182438] ffff888009a25c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.183333] ffff888009a25c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.184227] >ffff888009a25d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.185116] ^ [ 31.185577] ffff888009a25d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.186472] ffff888009a25e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.187355] ================================================================== [ 31.188346] Disabling lock debugging due to kernel taint [ 33.396249] BUG: Bad rss-counter state mm:00000000eeb7fb31 type:MM_FILEPAGES val:33 [ 33.397543] BUG: Bad rss-counter state mm:00000000eeb7fb31 type:MM_ANONPAGES val:22 [ 33.868321] BUG: Bad rss-counter state mm:0000000000d8193f type:MM_FILEPAGES val:33 [ 33.869385] BUG: Bad rss-counter state mm:0000000000d8193f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58166' (ECDSA) to the list of known hosts. 2023/06/20 16:32:02 fuzzer started 2023/06/20 16:32:02 dialing manager at localhost:36067 2023/06/20 16:32:02 checking machine... 2023/06/20 16:32:02 checking revisions... [ 34.571199] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:32:02 testing simple program... [ 34.618561] cgroup: Unknown subsys name 'net' [ 34.654058] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:32:01 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff866212df RCX=ffffffff864bf101 RDX=1ffff1100d9c135e RSI=0000000000000000 RDI=ffffffff866212df RBP=ffffffff866212df RSP=ffff88806ce09a20 R8 =ffffffff864bf1b8 R9 =ffff88806ce09ad8 R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff8880139912e0 RIP=ffffffff81007b48 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 0000000000000000 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=00007fe0c179fbe0 CR3=0000000015afa000 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=2031303a32333a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a32333a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800f1d3680 RSI=ffffffff8386af35 RDI=ffff88800f1d3a74 RBP=1ffff11001ec8f50 RSP=ffff88800f647a78 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff888008f65000 R13=ffff888008f65080 R14=ffffffff87f97640 R15=ffff88800f647aa0 RIP=ffffffff814c089b 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 00007f57a910e900 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=00007fff70ea2000 CR3=000000000e384000 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=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