[ 36.106987] BUG: Bad rss-counter state mm:0000000022bad629 type:MM_FILEPAGES val:33 [ 36.108181] BUG: Bad rss-counter state mm:0000000022bad629 type:MM_ANONPAGES val:22 [ 36.146970] ================================================================== [ 36.147957] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.149032] Read of size 8 at addr ffff88800e4deb38 by task sshd/219 [ 36.149875] [ 36.150112] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.151037] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.152087] Call Trace: [ 36.152436] [ 36.152741] dump_stack_lvl+0x91/0xf0 [ 36.153274] print_report+0xcc/0x620 [ 36.153782] ? __virt_addr_valid+0x102/0x340 [ 36.154346] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.155021] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.155701] kasan_report+0xbe/0xf0 [ 36.156217] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.156936] vma_interval_tree_remove+0xc75/0xec0 [ 36.157637] vma_prepare+0xc54/0x11a0 [ 36.158178] __split_vma+0x5af/0x950 [ 36.158706] ? __pfx___split_vma+0x10/0x10 [ 36.159302] ? find_held_lock+0x2c/0x110 [ 36.159897] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.160541] ? lock_is_held_type+0x9f/0x120 [ 36.161156] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.161824] ? mtree_range_walk+0x632/0x900 [ 36.162424] ? mas_walk+0x5c7/0x7c0 [ 36.162978] do_vmi_munmap+0x1f1/0x2b0 [ 36.163553] mmap_region+0x1f9/0x2660 [ 36.164112] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.164703] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.165520] ? __pfx_lock_acquire+0x10/0x10 [ 36.166083] ? __pfx_mmap_region+0x10/0x10 [ 36.166684] ? security_mmap_addr+0x7d/0xa0 [ 36.167301] ? get_unmapped_area+0x1f5/0x3f0 [ 36.167938] do_mmap+0x854/0xf00 [ 36.168428] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.168937] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.169566] ksys_mmap_pgoff+0x3af/0x500 [ 36.170166] do_syscall_64+0x3f/0x90 [ 36.170727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.171497] RIP: 0033:0x7fd81074ad82 [ 36.172040] 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 [ 36.174446] RSP: 002b:00007ffffca7d818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.175517] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd81074ad82 [ 36.176496] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd80fb84000 [ 36.177383] RBP: 00007fd80fb84000 R08: 0000000000000009 R09: 0000000000001000 [ 36.178342] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e6ea3b7ec0 [ 36.179294] R13: 00007ffffca7d830 R14: 00007ffffca7d860 R15: 00007ffffca7dbc0 [ 36.180250] [ 36.180564] [ 36.180788] Allocated by task 212: [ 36.181236] kasan_save_stack+0x22/0x50 [ 36.181780] kasan_set_track+0x25/0x30 [ 36.182308] __kasan_slab_alloc+0x59/0x70 [ 36.182893] kmem_cache_alloc+0x16b/0x370 [ 36.183488] vm_area_dup+0x20/0x160 [ 36.184012] __split_vma+0x170/0x950 [ 36.184547] split_vma+0xc6/0x110 [ 36.185055] mprotect_fixup+0x8d2/0xb30 [ 36.185617] do_mprotect_pkey+0x87e/0xd40 [ 36.186150] __x64_sys_mprotect+0x78/0xc0 [ 36.186742] do_syscall_64+0x3f/0x90 [ 36.187290] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.188025] [ 36.188271] Freed by task 212: [ 36.188678] kasan_save_stack+0x22/0x50 [ 36.189203] kasan_set_track+0x25/0x30 [ 36.189721] kasan_save_free_info+0x2b/0x50 [ 36.190273] __kasan_slab_free+0x10a/0x190 [ 36.190890] kmem_cache_free+0x10d/0x4d0 [ 36.191485] rcu_core+0x8c8/0x2860 [ 36.192009] __do_softirq+0x1b7/0x7d4 [ 36.192536] [ 36.192757] Last potentially related work creation: [ 36.193369] kasan_save_stack+0x22/0x50 [ 36.193892] __kasan_record_aux_stack+0x8e/0xa0 [ 36.194522] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.195291] remove_vma+0x139/0x170 [ 36.195833] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.196483] do_vmi_munmap+0x1f1/0x2b0 [ 36.196988] __vm_munmap+0x138/0x3a0 [ 36.197523] __x64_sys_munmap+0x59/0x80 [ 36.198123] do_syscall_64+0x3f/0x90 [ 36.198690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.199460] [ 36.199713] Second to last potentially related work creation: [ 36.200543] kasan_save_stack+0x22/0x50 [ 36.201138] __kasan_record_aux_stack+0x8e/0xa0 [ 36.201833] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.202611] remove_vma+0x139/0x170 [ 36.203154] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.203827] do_vmi_munmap+0x1f1/0x2b0 [ 36.204416] __vm_munmap+0x138/0x3a0 [ 36.204974] elf_map+0x26f/0x310 [ 36.205484] load_elf_binary+0xd82/0x5030 [ 36.206038] bprm_execve+0x803/0x1940 [ 36.206566] do_execveat_common+0x734/0x8e0 [ 36.207216] __x64_sys_execve+0x93/0xc0 [ 36.207827] do_syscall_64+0x3f/0x90 [ 36.208408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.209201] [ 36.209459] The buggy address belongs to the object at ffff88800e4deae0 [ 36.209459] which belongs to the cache vm_area_struct of size 168 [ 36.211305] The buggy address is located 88 bytes inside of [ 36.211305] freed 168-byte region [ffff88800e4deae0, ffff88800e4deb88) [ 36.212931] [ 36.213157] The buggy address belongs to the physical page: [ 36.213844] page:000000008a0f4ee9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4de [ 36.215121] memcg:ffff88800dc9c101 [ 36.215649] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.216448] page_type: 0xffffffff() [ 36.216917] raw: 0100000000000200 ffff88800879fc80 ffffea00003917c0 dead000000000002 [ 36.217881] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc9c101 [ 36.218820] page dumped because: kasan: bad access detected [ 36.219645] [ 36.219916] Memory state around the buggy address: [ 36.220650] ffff88800e4dea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.221769] ffff88800e4dea80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 36.222860] >ffff88800e4deb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.223944] ^ [ 36.224723] ffff88800e4deb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 36.225728] ffff88800e4dec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 36.226679] ================================================================== [ 36.227940] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 38.056931] BUG: Bad rss-counter state mm:000000004942b1ad type:MM_FILEPAGES val:33 [ 38.058376] BUG: Bad rss-counter state mm:000000004942b1ad type:MM_ANONPAGES val:22 [ 38.476526] BUG: Bad rss-counter state mm:0000000094fe7d75 type:MM_FILEPAGES val:33 [ 38.477695] BUG: Bad rss-counter state mm:0000000094fe7d75 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58538' (ECDSA) to the list of known hosts. 2023/06/19 17:31:59 fuzzer started 2023/06/19 17:31:59 dialing manager at localhost:44161 2023/06/19 17:31:59 checking machine... 2023/06/19 17:31:59 checking revisions... [ 39.055861] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:31:59 testing simple program... [ 39.112227] cgroup: Unknown subsys name 'net' [ 39.151300] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:31:47 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=00000000f2400aac RCX=ffff88806c405560 RDX=0000000000000007 RSI=0000000000000002 RDI=000000008542456b RBP=ffff88800c4bfa70 RSP=ffff88806ce09b20 R8 =00000000b50c5979 R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff88806ce09b88 R15=0000000000000007 RIP=ffffffff82270f2d 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 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=00007fd7db166a88 CR3=00000000094c8000 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=2039353a31333a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a31333a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888018327730 RCX=0000000000000003 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff8880183276e8 RBP=ffff88801bc39b40 RSP=ffff888018327640 R8 =0000000000000006 R9 =0000000000000000 R10=ffff888018327698 R11=ffffffff81806df1 R12=0000000000000000 R13=ffff8880183276c0 R14=ffff88801bc39b40 R15=ffff888018327698 RIP=ffffffff8450d442 RFL=00000206 [-----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 00007fd4cc638900 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=00007ffc280fa000 CR3=00000000168ec000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000