syzkaller login: [ 30.973172] BUG: Bad rss-counter state mm:00000000a721bc51 type:MM_FILEPAGES val:33 [ 30.974201] BUG: Bad rss-counter state mm:00000000a721bc51 type:MM_ANONPAGES val:22 [ 31.139799] ================================================================== [ 31.140963] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.142092] Read of size 8 at addr ffff88800d807228 by task sshd/219 [ 31.142885] [ 31.143114] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.144003] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.145052] Call Trace: [ 31.145391] <TASK> [ 31.145689] dump_stack_lvl+0x91/0xf0 [ 31.146201] print_report+0xcc/0x620 [ 31.146700] ? __virt_addr_valid+0x102/0x340 [ 31.147269] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.147922] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.148564] kasan_report+0xbe/0xf0 [ 31.149075] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.149723] vma_interval_tree_remove+0xc75/0xec0 [ 31.150358] vma_prepare+0xc54/0x11a0 [ 31.150859] __split_vma+0x5af/0x950 [ 31.151361] ? __pfx___split_vma+0x10/0x10 [ 31.151908] ? find_held_lock+0x2c/0x110 [ 31.152449] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.153063] ? lock_is_held_type+0x9f/0x120 [ 31.153623] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.154250] ? mtree_range_walk+0x632/0x900 [ 31.154814] ? mas_walk+0x5c7/0x7c0 [ 31.155311] do_vmi_munmap+0x1f1/0x2b0 [ 31.155817] mmap_region+0x1f9/0x2660 [ 31.156309] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.156847] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.157587] ? __pfx_lock_acquire+0x10/0x10 [ 31.158145] ? __pfx_mmap_region+0x10/0x10 [ 31.158695] ? security_mmap_addr+0x7d/0xa0 [ 31.159246] ? get_unmapped_area+0x1f5/0x3f0 [ 31.159822] do_mmap+0x854/0xf00 [ 31.160282] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.160807] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.161388] ksys_mmap_pgoff+0x3af/0x500 [ 31.161912] do_syscall_64+0x3f/0x90 [ 31.162410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.163088] RIP: 0033:0x7f5d6a329d82 [ 31.163558] 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 [ 31.165780] RSP: 002b:00007fff74d9a578 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.166717] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d6a329d82 [ 31.167599] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d69763000 [ 31.168503] RBP: 00007f5d69763000 R08: 0000000000000009 R09: 0000000000001000 [ 31.169403] R10: 0000000000000812 R11: 0000000000000206 R12: 000056260ce43b20 [ 31.170304] R13: 00007fff74d9a590 R14: 00007fff74d9a5c0 R15: 00007fff74d9a920 [ 31.171202] </TASK> [ 31.171502] [ 31.171723] Allocated by task 212: [ 31.172169] kasan_save_stack+0x22/0x50 [ 31.172699] kasan_set_track+0x25/0x30 [ 31.173211] __kasan_slab_alloc+0x59/0x70 [ 31.173756] kmem_cache_alloc+0x16b/0x370 [ 31.174283] vm_area_dup+0x20/0x160 [ 31.174755] __split_vma+0x170/0x950 [ 31.175238] split_vma+0xc6/0x110 [ 31.175693] mprotect_fixup+0x8d2/0xb30 [ 31.176207] do_mprotect_pkey+0x87e/0xd40 [ 31.176769] __x64_sys_mprotect+0x78/0xc0 [ 31.177311] do_syscall_64+0x3f/0x90 [ 31.177796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.178456] [ 31.178681] Freed by task 212: [ 31.179092] kasan_save_stack+0x22/0x50 [ 31.179612] kasan_set_track+0x25/0x30 [ 31.180120] kasan_save_free_info+0x2b/0x50 [ 31.180676] __kasan_slab_free+0x10a/0x190 [ 31.181229] kmem_cache_free+0x10d/0x4d0 [ 31.181764] rcu_core+0x8c8/0x2860 [ 31.182225] __do_softirq+0x1b7/0x7d4 [ 31.182736] [ 31.182959] Last potentially related work creation: [ 31.183579] kasan_save_stack+0x22/0x50 [ 31.184105] __kasan_record_aux_stack+0x8e/0xa0 [ 31.184713] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.185380] remove_vma+0x139/0x170 [ 31.185851] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.186434] do_vmi_munmap+0x1f1/0x2b0 [ 31.186930] __vm_munmap+0x138/0x3a0 [ 31.187419] __x64_sys_munmap+0x59/0x80 [ 31.187935] do_syscall_64+0x3f/0x90 [ 31.188420] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.189109] [ 31.189330] Second to last potentially related work creation: [ 31.190043] kasan_save_stack+0x22/0x50 [ 31.190564] __kasan_record_aux_stack+0x8e/0xa0 [ 31.191161] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.191828] remove_vma+0x139/0x170 [ 31.192293] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.192880] do_vmi_munmap+0x1f1/0x2b0 [ 31.193388] __vm_munmap+0x138/0x3a0 [ 31.193876] elf_map+0x26f/0x310 [ 31.194325] load_elf_binary+0xd82/0x5030 [ 31.194868] bprm_execve+0x803/0x1940 [ 31.195357] do_execveat_common+0x734/0x8e0 [ 31.195897] __x64_sys_execve+0x93/0xc0 [ 31.196406] do_syscall_64+0x3f/0x90 [ 31.196925] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.197595] [ 31.197817] The buggy address belongs to the object at ffff88800d8071d0 [ 31.197817] which belongs to the cache vm_area_struct of size 168 [ 31.199378] The buggy address is located 88 bytes inside of [ 31.199378] freed 168-byte region [ffff88800d8071d0, ffff88800d807278) [ 31.200847] [ 31.201069] The buggy address belongs to the physical page: [ 31.201753] page:0000000052ff5d9a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd807 [ 31.202888] memcg:ffff88800ded8501 [ 31.203331] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.204073] page_type: 0xffffffff() [ 31.204555] raw: 0100000000000200 ffff8880087a0c80 ffffea0000378400 dead000000000007 [ 31.205474] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ded8501 [ 31.206429] page dumped because: kasan: bad access detected [ 31.207103] [ 31.207326] Memory state around the buggy address: [ 31.207913] ffff88800d807100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.208787] ffff88800d807180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.209644] >ffff88800d807200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.210504] ^ [ 31.211053] ffff88800d807280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.211909] ffff88800d807300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.212800] ================================================================== [ 31.213974] Disabling lock debugging due to kernel taint [ 33.019325] BUG: Bad rss-counter state mm:00000000f621f040 type:MM_FILEPAGES val:33 [ 33.020501] BUG: Bad rss-counter state mm:00000000f621f040 type:MM_ANONPAGES val:22 [ 33.438192] BUG: Bad rss-counter state mm:00000000a0f74df8 type:MM_FILEPAGES val:33 [ 33.439342] BUG: Bad rss-counter state mm:00000000a0f74df8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1987' (ECDSA) to the list of known hosts. 2023/06/20 13:12:13 fuzzer started 2023/06/20 13:12:13 dialing manager at localhost:36067 2023/06/20 13:12:13 checking machine... 2023/06/20 13:12:13 checking revisions... [ 34.080347] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:12:13 testing simple program... [ 34.128107] cgroup: Unknown subsys name 'net' [ 34.164520] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:12:13 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f865d67eb00 CR3=0000000016d22000 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=2033313a32313a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a32313a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100d9e1357 RSI=ffff88801657ff48 RDI=ffff88806cf09ac0 RBP=0000000000000000 RSP=ffff88806cf09a00 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b5080 R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88801657ff48 R15=ffff88806cf09a70 RIP=ffffffff81131c60 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 00007f87ab194900 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=00007ffe720c8000 CR3=000000000ccb4000 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