syzkaller login: [ 31.001266] BUG: Bad rss-counter state mm:00000000ac5a6ca0 type:MM_FILEPAGES val:33 [ 31.002222] BUG: Bad rss-counter state mm:00000000ac5a6ca0 type:MM_ANONPAGES val:22 [ 31.174541] ================================================================== [ 31.175498] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.176594] Read of size 8 at addr ffff8880146786b0 by task sshd/219 [ 31.177450] [ 31.177677] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.178586] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.179649] Call Trace: [ 31.179986] [ 31.180287] dump_stack_lvl+0x91/0xf0 [ 31.180837] print_report+0xcc/0x620 [ 31.181362] ? __virt_addr_valid+0x102/0x340 [ 31.181969] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.182627] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.183308] kasan_report+0xbe/0xf0 [ 31.183812] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.184482] vma_interval_tree_remove+0xc75/0xec0 [ 31.185114] vma_prepare+0xc54/0x11a0 [ 31.185635] __split_vma+0x5af/0x950 [ 31.186140] ? __pfx___split_vma+0x10/0x10 [ 31.186712] ? find_held_lock+0x2c/0x110 [ 31.187264] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.187870] ? lock_is_held_type+0x9f/0x120 [ 31.188451] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.189098] ? mtree_range_walk+0x632/0x900 [ 31.189689] ? mas_walk+0x5c7/0x7c0 [ 31.190196] do_vmi_munmap+0x1f1/0x2b0 [ 31.190708] mmap_region+0x1f9/0x2660 [ 31.191218] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.191760] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.192532] ? __pfx_lock_acquire+0x10/0x10 [ 31.193096] ? __pfx_mmap_region+0x10/0x10 [ 31.193685] ? security_mmap_addr+0x7d/0xa0 [ 31.194247] ? get_unmapped_area+0x1f5/0x3f0 [ 31.194835] do_mmap+0x854/0xf00 [ 31.195289] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.195814] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.196433] ksys_mmap_pgoff+0x3af/0x500 [ 31.196989] do_syscall_64+0x3f/0x90 [ 31.197486] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.198181] RIP: 0033:0x7f7fcd937d82 [ 31.198667] 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 [ 31.200925] RSP: 002b:00007ffc0c571b28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.201896] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7fcd937d82 [ 31.202801] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7fccd71000 [ 31.203685] RBP: 00007f7fccd71000 R08: 0000000000000009 R09: 0000000000001000 [ 31.204614] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561c698fef70 [ 31.205499] R13: 00007ffc0c571b40 R14: 00007ffc0c571b70 R15: 00007ffc0c571ed0 [ 31.206387] [ 31.206682] [ 31.206899] Allocated by task 212: [ 31.207364] kasan_save_stack+0x22/0x50 [ 31.207896] kasan_set_track+0x25/0x30 [ 31.208420] __kasan_slab_alloc+0x59/0x70 [ 31.208988] kmem_cache_alloc+0x16b/0x370 [ 31.209531] vm_area_dup+0x20/0x160 [ 31.210021] __split_vma+0x170/0x950 [ 31.210512] split_vma+0xc6/0x110 [ 31.210973] mprotect_fixup+0x8d2/0xb30 [ 31.211507] do_mprotect_pkey+0x87e/0xd40 [ 31.212070] __x64_sys_mprotect+0x78/0xc0 [ 31.212653] do_syscall_64+0x3f/0x90 [ 31.213207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.213892] [ 31.214121] Freed by task 212: [ 31.214556] kasan_save_stack+0x22/0x50 [ 31.215095] kasan_set_track+0x25/0x30 [ 31.215614] kasan_save_free_info+0x2b/0x50 [ 31.216188] __kasan_slab_free+0x10a/0x190 [ 31.216787] kmem_cache_free+0x10d/0x4d0 [ 31.217346] rcu_core+0x8c8/0x2860 [ 31.217818] __do_softirq+0x1b7/0x7d4 [ 31.218338] [ 31.218571] Last potentially related work creation: [ 31.219207] kasan_save_stack+0x22/0x50 [ 31.219746] __kasan_record_aux_stack+0x8e/0xa0 [ 31.220375] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.221075] remove_vma+0x139/0x170 [ 31.221578] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.222206] do_vmi_munmap+0x1f1/0x2b0 [ 31.222773] __vm_munmap+0x138/0x3a0 [ 31.223301] __x64_sys_munmap+0x59/0x80 [ 31.223852] do_syscall_64+0x3f/0x90 [ 31.224385] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.225113] [ 31.225346] The buggy address belongs to the object at ffff888014678658 [ 31.225346] which belongs to the cache vm_area_struct of size 168 [ 31.226991] The buggy address is located 88 bytes inside of [ 31.226991] freed 168-byte region [ffff888014678658, ffff888014678700) [ 31.228621] [ 31.228868] The buggy address belongs to the physical page: [ 31.229599] page:00000000543a8208 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14678 [ 31.230822] memcg:ffff8880147ab401 [ 31.231285] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.232076] page_type: 0xffffffff() [ 31.232603] raw: 0100000000000200 ffff8880087a0c80 ffffea00005b5b00 0000000000000005 [ 31.233573] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880147ab401 [ 31.234573] page dumped because: kasan: bad access detected [ 31.235284] [ 31.235513] Memory state around the buggy address: [ 31.236132] ffff888014678580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.237052] ffff888014678600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.237987] >ffff888014678680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.238898] ^ [ 31.239521] ffff888014678700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.240441] ffff888014678780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.241370] ================================================================== [ 31.242429] Disabling lock debugging due to kernel taint [ 33.181701] BUG: Bad rss-counter state mm:00000000295566c1 type:MM_FILEPAGES val:33 [ 33.183051] BUG: Bad rss-counter state mm:00000000295566c1 type:MM_ANONPAGES val:22 [ 33.617492] BUG: Bad rss-counter state mm:000000002b89b7d6 type:MM_FILEPAGES val:33 [ 33.618431] BUG: Bad rss-counter state mm:000000002b89b7d6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19543' (ECDSA) to the list of known hosts. 2023/06/21 05:56:27 fuzzer started 2023/06/21 05:56:28 dialing manager at localhost:36067 2023/06/21 05:56:28 checking machine... 2023/06/21 05:56:28 checking revisions... [ 34.328607] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:56:28 testing simple program... [ 34.384036] cgroup: Unknown subsys name 'net' [ 34.440549] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:56:27 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=00007f9dddfd7b90 CR3=000000000e33e000 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=00000000000000000000000000000000 XMM01=d6acf2f61d7fe783b04fa0baa35b0564 XMM02=ec2efd57dc4c00df0000000000119ec0 XMM03=4999d975589f06410000000000119f90 XMM04=31898cace552efc300000000000ae988 XMM05=dfcdbad4f1609c370000000000131318 XMM06=1fde976c6f1b18060000000000130180 XMM07=e042d86d42eb936e0000000000121458 XMM08=4999d975589f06410000000000119f90 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000020 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800fc3fb01 RSI=ffff88800fc3fbb8 RDI=ffff88800fc3fbb8 RBP=ffff88800fc3f840 RSP=ffff88800fc3f778 R8 =0000000000000001 R9 =ffff88800fc3f828 R10=0000000000038001 R11=0000000000020c51 R12=ffff88800fc3f848 R13=ffff88800fc3f830 R14=ffff88800fc3fbb8 R15=ffff88800fc3f7e8 RIP=ffffffff81131236 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 00007f0a45bcb900 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=00007ffd1080e000 CR3=0000000016548000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000