syzkaller login: [ 37.000257] BUG: Bad rss-counter state mm:000000002dc4a2c8 type:MM_FILEPAGES val:33 [ 37.001644] BUG: Bad rss-counter state mm:000000002dc4a2c8 type:MM_ANONPAGES val:22 [ 37.169787] ================================================================== [ 37.170746] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.171684] Read of size 8 at addr ffff88800f76f058 by task sshd/229 [ 37.172468] [ 37.172685] CPU: 1 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.173748] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.174755] Call Trace: [ 37.175081] [ 37.175384] dump_stack_lvl+0x91/0xf0 [ 37.175890] print_report+0xcc/0x620 [ 37.176379] ? __virt_addr_valid+0x102/0x340 [ 37.176942] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.177572] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.178201] kasan_report+0xbe/0xf0 [ 37.178678] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.179310] vma_interval_tree_remove+0xc75/0xec0 [ 37.179936] vma_prepare+0xc54/0x11a0 [ 37.180417] __split_vma+0x5af/0x950 [ 37.180894] ? __pfx___split_vma+0x10/0x10 [ 37.181430] ? find_held_lock+0x2c/0x110 [ 37.181957] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.182541] ? lock_is_held_type+0x9f/0x120 [ 37.183085] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.183697] ? mtree_range_walk+0x632/0x900 [ 37.184252] ? mas_walk+0x5c7/0x7c0 [ 37.184727] do_vmi_munmap+0x1f1/0x2b0 [ 37.185218] mmap_region+0x1f9/0x2660 [ 37.185701] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.186234] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.186947] ? __pfx_lock_acquire+0x10/0x10 [ 37.187486] ? __pfx_mmap_region+0x10/0x10 [ 37.188041] ? security_mmap_addr+0x7d/0xa0 [ 37.188569] ? get_unmapped_area+0x1f5/0x3f0 [ 37.189130] do_mmap+0x854/0xf00 [ 37.189576] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.190071] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.190658] ksys_mmap_pgoff+0x3af/0x500 [ 37.191170] do_syscall_64+0x3f/0x90 [ 37.191651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.192306] RIP: 0033:0x7fee34f4cd82 [ 37.192763] 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 [ 37.194941] RSP: 002b:00007ffedbec4528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.195858] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fee34f4cd82 [ 37.196710] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fee34386000 [ 37.197549] RBP: 00007fee34386000 R08: 0000000000000009 R09: 0000000000001000 [ 37.198398] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b5043b6ec0 [ 37.199243] R13: 00007ffedbec4540 R14: 00007ffedbec4570 R15: 00007ffedbec48d0 [ 37.200095] [ 37.200384] [ 37.200605] Allocated by task 222: [ 37.201037] kasan_save_stack+0x22/0x50 [ 37.201540] kasan_set_track+0x25/0x30 [ 37.202033] __kasan_slab_alloc+0x59/0x70 [ 37.202575] kmem_cache_alloc+0x16b/0x370 [ 37.203098] vm_area_dup+0x20/0x160 [ 37.203556] __split_vma+0x170/0x950 [ 37.204021] split_vma+0xc6/0x110 [ 37.204464] mprotect_fixup+0x8d2/0xb30 [ 37.204965] do_mprotect_pkey+0x87e/0xd40 [ 37.205494] __x64_sys_mprotect+0x78/0xc0 [ 37.206016] do_syscall_64+0x3f/0x90 [ 37.206504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.207143] [ 37.207360] Freed by task 222: [ 37.207752] kasan_save_stack+0x22/0x50 [ 37.208263] kasan_set_track+0x25/0x30 [ 37.208754] kasan_save_free_info+0x2b/0x50 [ 37.209286] __kasan_slab_free+0x10a/0x190 [ 37.209823] kmem_cache_free+0x10d/0x4d0 [ 37.210346] rcu_core+0x8c8/0x2860 [ 37.210801] __do_softirq+0x1b7/0x7d4 [ 37.211288] [ 37.211507] Last potentially related work creation: [ 37.212096] kasan_save_stack+0x22/0x50 [ 37.212612] __kasan_record_aux_stack+0x8e/0xa0 [ 37.213191] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.213833] remove_vma+0x139/0x170 [ 37.214292] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.214861] do_vmi_munmap+0x1f1/0x2b0 [ 37.215349] __vm_munmap+0x138/0x3a0 [ 37.215819] __x64_sys_munmap+0x59/0x80 [ 37.216318] do_syscall_64+0x3f/0x90 [ 37.216796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.217447] [ 37.217664] The buggy address belongs to the object at ffff88800f76f000 [ 37.217664] which belongs to the cache vm_area_struct of size 168 [ 37.219165] The buggy address is located 88 bytes inside of [ 37.219165] freed 168-byte region [ffff88800f76f000, ffff88800f76f0a8) [ 37.220560] [ 37.220779] The buggy address belongs to the physical page: [ 37.221432] page:0000000069d31faa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf76f [ 37.222538] memcg:ffff888019c24901 [ 37.222967] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.223611] page_type: 0xffffffff() [ 37.224061] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.224978] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c24901 [ 37.225888] page dumped because: kasan: bad access detected [ 37.226565] [ 37.226786] Memory state around the buggy address: [ 37.227362] ffff88800f76ef00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 37.228219] ffff88800f76ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 37.229090] >ffff88800f76f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.229948] ^ [ 37.230695] ffff88800f76f080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 37.231544] ffff88800f76f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.232396] ================================================================== [ 37.233589] Disabling lock debugging due to kernel taint [ 39.803272] BUG: Bad rss-counter state mm:000000009f143c84 type:MM_FILEPAGES val:33 [ 39.804425] BUG: Bad rss-counter state mm:000000009f143c84 type:MM_ANONPAGES val:22 [ 40.269063] BUG: Bad rss-counter state mm:0000000046066efd type:MM_FILEPAGES val:33 [ 40.270226] BUG: Bad rss-counter state mm:0000000046066efd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18624' (ECDSA) to the list of known hosts. 2023/06/19 20:21:10 fuzzer started 2023/06/19 20:21:10 dialing manager at localhost:44161 2023/06/19 20:21:10 checking machine... 2023/06/19 20:21:10 checking revisions... [ 40.922208] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:21:11 testing simple program... [ 40.975355] cgroup: Unknown subsys name 'net' [ 41.040407] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:21:04 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b2338 RDX=1ffff110031a4e94 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888018d274b0 RSP=ffff888018d273e8 R8 =ffffffff863b233c R9 =ffff888018d27498 R10=0000000000038001 R11=000000000008aa92 R12=ffff888018d274b8 R13=ffff888018d274a0 R14=0000000000000005 R15=ffff888018d27458 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 00007efff9ba2900 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=00007fff78823000 CR3=000000000e790000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007f417e4b4690 CR3=0000000010340000 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=90be7de22a9357991d4234aa8436557d XMM02=000000000011d760ec2efd57dc4c00df XMM03=0000000000124888a11eaeed5194827a XMM04=d87973622e28de6700000000000ae988 XMM05=8908822991f7c79d0000000000134920 XMM06=8fede82a5ad58cbe0000000000134318 XMM07=e042d86d42eb936e0000000000124b08 XMM08=a11eaeed5194827a000000000011d7c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000