syzkaller login: [ 30.965590] BUG: Bad rss-counter state mm:000000006040e0ee type:MM_FILEPAGES val:33 [ 30.967594] BUG: Bad rss-counter state mm:000000006040e0ee type:MM_ANONPAGES val:22 [ 31.136655] ================================================================== [ 31.137726] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.138859] Read of size 8 at addr ffff88800d9623f8 by task sshd/219 [ 31.139769] [ 31.139988] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.140841] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.141827] Call Trace: [ 31.142144] [ 31.142438] dump_stack_lvl+0x91/0xf0 [ 31.142927] print_report+0xcc/0x620 [ 31.143416] ? __virt_addr_valid+0x102/0x340 [ 31.143962] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.144576] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.145190] kasan_report+0xbe/0xf0 [ 31.145662] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.146285] vma_interval_tree_remove+0xc75/0xec0 [ 31.146898] vma_prepare+0xc54/0x11a0 [ 31.147371] __split_vma+0x5af/0x950 [ 31.147836] ? __pfx___split_vma+0x10/0x10 [ 31.148366] ? find_held_lock+0x2c/0x110 [ 31.148887] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.149444] ? lock_is_held_type+0x9f/0x120 [ 31.149985] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.150621] ? mtree_range_walk+0x632/0x900 [ 31.151178] ? mas_walk+0x5c7/0x7c0 [ 31.151654] do_vmi_munmap+0x1f1/0x2b0 [ 31.152145] mmap_region+0x1f9/0x2660 [ 31.152625] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.153133] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.153843] ? __pfx_lock_acquire+0x10/0x10 [ 31.154379] ? __pfx_mmap_region+0x10/0x10 [ 31.154930] ? security_mmap_addr+0x7d/0xa0 [ 31.155465] ? get_unmapped_area+0x1f5/0x3f0 [ 31.156024] do_mmap+0x854/0xf00 [ 31.156464] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.156952] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.157519] ksys_mmap_pgoff+0x3af/0x500 [ 31.158040] do_syscall_64+0x3f/0x90 [ 31.158554] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.159220] RIP: 0033:0x7f31bab7ad82 [ 31.159697] 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 [ 31.161908] RSP: 002b:00007ffdc9aae4c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.162863] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f31bab7ad82 [ 31.163746] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f31b9fb4000 [ 31.164630] RBP: 00007f31b9fb4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.165508] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e317fa8ec0 [ 31.166398] R13: 00007ffdc9aae4e0 R14: 00007ffdc9aae510 R15: 00007ffdc9aae870 [ 31.167289] [ 31.167593] [ 31.167818] Allocated by task 212: [ 31.168262] kasan_save_stack+0x22/0x50 [ 31.168783] kasan_set_track+0x25/0x30 [ 31.169298] __kasan_slab_alloc+0x59/0x70 [ 31.169848] kmem_cache_alloc+0x16b/0x370 [ 31.170390] vm_area_dup+0x20/0x160 [ 31.170870] __split_vma+0x170/0x950 [ 31.171353] split_vma+0xc6/0x110 [ 31.171814] mprotect_fixup+0x8d2/0xb30 [ 31.172330] do_mprotect_pkey+0x87e/0xd40 [ 31.172868] __x64_sys_mprotect+0x78/0xc0 [ 31.173409] do_syscall_64+0x3f/0x90 [ 31.173903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.174585] [ 31.174807] Freed by task 212: [ 31.175213] kasan_save_stack+0x22/0x50 [ 31.175737] kasan_set_track+0x25/0x30 [ 31.176251] kasan_save_free_info+0x2b/0x50 [ 31.176801] __kasan_slab_free+0x10a/0x190 [ 31.177348] kmem_cache_free+0x10d/0x4d0 [ 31.177877] rcu_core+0x8c8/0x2860 [ 31.178332] __do_softirq+0x1b7/0x7d4 [ 31.178845] [ 31.179071] Last potentially related work creation: [ 31.179679] kasan_save_stack+0x22/0x50 [ 31.180197] __kasan_record_aux_stack+0x8e/0xa0 [ 31.180790] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.181456] remove_vma+0x139/0x170 [ 31.181924] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.182511] do_vmi_munmap+0x1f1/0x2b0 [ 31.183013] __vm_munmap+0x138/0x3a0 [ 31.183498] __x64_sys_munmap+0x59/0x80 [ 31.184015] do_syscall_64+0x3f/0x90 [ 31.184506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.185172] [ 31.185397] Second to last potentially related work creation: [ 31.186107] kasan_save_stack+0x22/0x50 [ 31.186647] __kasan_record_aux_stack+0x8e/0xa0 [ 31.187238] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.187905] remove_vma+0x139/0x170 [ 31.188373] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.188946] do_vmi_munmap+0x1f1/0x2b0 [ 31.189446] mmap_region+0x1f9/0x2660 [ 31.189945] do_mmap+0x854/0xf00 [ 31.190395] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.190903] ksys_mmap_pgoff+0x3af/0x500 [ 31.191425] do_syscall_64+0x3f/0x90 [ 31.191914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.192579] [ 31.192800] The buggy address belongs to the object at ffff88800d9623a0 [ 31.192800] which belongs to the cache vm_area_struct of size 168 [ 31.194322] The buggy address is located 88 bytes inside of [ 31.194322] freed 168-byte region [ffff88800d9623a0, ffff88800d962448) [ 31.195789] [ 31.196013] The buggy address belongs to the physical page: [ 31.196694] page:00000000ea858666 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd962 [ 31.197812] memcg:ffff88800d3b4901 [ 31.198251] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.198944] page_type: 0xffffffff() [ 31.199410] raw: 0100000000000200 ffff88800879fc80 ffffea000038a540 dead000000000004 [ 31.200366] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3b4901 [ 31.201311] page dumped because: kasan: bad access detected [ 31.201998] [ 31.202221] Memory state around the buggy address: [ 31.202834] ffff88800d962280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.203725] ffff88800d962300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.204611] >ffff88800d962380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.205494] ^ [ 31.206370] ffff88800d962400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.207275] ffff88800d962480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.208162] ================================================================== [ 31.209160] Disabling lock debugging due to kernel taint [ 33.023666] BUG: Bad rss-counter state mm:00000000c6406af8 type:MM_FILEPAGES val:33 [ 33.024676] BUG: Bad rss-counter state mm:00000000c6406af8 type:MM_ANONPAGES val:22 [ 33.516712] BUG: Bad rss-counter state mm:00000000cd6b3466 type:MM_FILEPAGES val:33 [ 33.517861] BUG: Bad rss-counter state mm:00000000cd6b3466 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53218' (ECDSA) to the list of known hosts. 2023/06/19 23:05:45 fuzzer started 2023/06/19 23:05:46 dialing manager at localhost:44161 2023/06/19 23:05:46 checking machine... 2023/06/19 23:05:46 checking revisions... [ 34.219054] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:05:46 testing simple program... [ 34.270542] cgroup: Unknown subsys name 'net' [ 34.309912] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:05:45 Registers: info registers vcpu 0 RAX=00000000000000c1 RBX=000055dcb5238d60 RCX=ffffffffffffffff RDX=00007fa01945e260 RSI=00000000ffffffff RDI=00007fa01a0adcf0 RBP=000055dcb523a428 RSP=00007ffd21ef7788 R8 =000055dcb5253270 R9 =000055dcb5238010 R10=0000000000000000 R11=0000000000000000 R12=00000000ffffffff R13=00000000fffffffa R14=000055dcb52485e0 R15=00000000fffffffe RIP=00007fa01a0ca4f9 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa01945d900 00000000 00000000 GS =0000 0000000000000000 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=00007f60634db650 CR3=000000000d724000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=09a0a7608390680500000000000ae988 XMM05=6ea589646de2863500000000001358b0 XMM06=806171799158d9670000000000134330 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=000055f756125000 CR3=000000000ef4e000 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=2035343a35303a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a35303a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000