syzkaller login: [ 37.946521] BUG: Bad rss-counter state mm:00000000cd589866 type:MM_FILEPAGES val:33 [ 37.947520] BUG: Bad rss-counter state mm:00000000cd589866 type:MM_ANONPAGES val:22 [ 38.113794] ================================================================== [ 38.114702] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.115623] Read of size 8 at addr ffff88800e213880 by task sshd/220 [ 38.116467] [ 38.116694] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.117571] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.118541] Call Trace: [ 38.118854] [ 38.119135] dump_stack_lvl+0x91/0xf0 [ 38.119618] print_report+0xcc/0x620 [ 38.120093] ? __virt_addr_valid+0x102/0x340 [ 38.120645] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.121259] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.121885] kasan_report+0xbe/0xf0 [ 38.122361] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.122996] vma_interval_tree_remove+0xc75/0xec0 [ 38.123592] vma_prepare+0xc54/0x11a0 [ 38.124068] __split_vma+0x5af/0x950 [ 38.124535] ? __pfx___split_vma+0x10/0x10 [ 38.125059] ? find_held_lock+0x2c/0x110 [ 38.125579] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.126136] ? lock_is_held_type+0x9f/0x120 [ 38.126668] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.127262] ? mtree_range_walk+0x632/0x900 [ 38.127803] ? mas_walk+0x5c7/0x7c0 [ 38.128308] do_vmi_munmap+0x1f1/0x2b0 [ 38.128796] mmap_region+0x1f9/0x2660 [ 38.129282] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.129816] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.130565] ? __pfx_lock_acquire+0x10/0x10 [ 38.131106] ? __pfx_mmap_region+0x10/0x10 [ 38.131657] ? security_mmap_addr+0x7d/0xa0 [ 38.132201] ? get_unmapped_area+0x1f5/0x3f0 [ 38.132777] do_mmap+0x854/0xf00 [ 38.133245] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.133772] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.134345] ksys_mmap_pgoff+0x3af/0x500 [ 38.134876] do_syscall_64+0x3f/0x90 [ 38.135370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.136040] RIP: 0033:0x7fc287c7bd82 [ 38.136516] 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 [ 38.138751] RSP: 002b:00007fff3de79218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.139659] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc287c7bd82 [ 38.140499] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc2870b5000 [ 38.141341] RBP: 00007fc2870b5000 R08: 0000000000000009 R09: 0000000000001000 [ 38.142188] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fa17020ec0 [ 38.143036] R13: 00007fff3de79230 R14: 00007fff3de79260 R15: 00007fff3de795c0 [ 38.143889] [ 38.144178] [ 38.144394] Allocated by task 212: [ 38.144820] kasan_save_stack+0x22/0x50 [ 38.145317] kasan_set_track+0x25/0x30 [ 38.145830] __kasan_slab_alloc+0x59/0x70 [ 38.146353] kmem_cache_alloc+0x16b/0x370 [ 38.146874] vm_area_dup+0x20/0x160 [ 38.147324] __split_vma+0x170/0x950 [ 38.147786] split_vma+0xc6/0x110 [ 38.148225] mprotect_fixup+0x8d2/0xb30 [ 38.148728] do_mprotect_pkey+0x87e/0xd40 [ 38.149247] __x64_sys_mprotect+0x78/0xc0 [ 38.149775] do_syscall_64+0x3f/0x90 [ 38.150248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.150883] [ 38.151100] Freed by task 212: [ 38.151490] kasan_save_stack+0x22/0x50 [ 38.151993] kasan_set_track+0x25/0x30 [ 38.152485] kasan_save_free_info+0x2b/0x50 [ 38.153012] __kasan_slab_free+0x10a/0x190 [ 38.153549] kmem_cache_free+0x10d/0x4d0 [ 38.154055] rcu_core+0x8c8/0x2860 [ 38.154497] __do_softirq+0x1b7/0x7d4 [ 38.154971] [ 38.155187] Last potentially related work creation: [ 38.155771] kasan_save_stack+0x22/0x50 [ 38.156273] __kasan_record_aux_stack+0x8e/0xa0 [ 38.156846] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.157490] remove_vma+0x139/0x170 [ 38.157955] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.158509] do_vmi_munmap+0x1f1/0x2b0 [ 38.158997] __vm_munmap+0x138/0x3a0 [ 38.159457] __x64_sys_munmap+0x59/0x80 [ 38.159949] do_syscall_64+0x3f/0x90 [ 38.160419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.161056] [ 38.161271] Second to last potentially related work creation: [ 38.161959] kasan_save_stack+0x22/0x50 [ 38.162463] __kasan_record_aux_stack+0x8e/0xa0 [ 38.163037] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.163676] remove_vma+0x139/0x170 [ 38.164126] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.164693] do_vmi_munmap+0x1f1/0x2b0 [ 38.165175] __vm_munmap+0x138/0x3a0 [ 38.165649] __x64_sys_munmap+0x59/0x80 [ 38.166141] do_syscall_64+0x3f/0x90 [ 38.166614] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.167249] [ 38.167461] The buggy address belongs to the object at ffff88800e213828 [ 38.167461] which belongs to the cache vm_area_struct of size 168 [ 38.168924] The buggy address is located 88 bytes inside of [ 38.168924] freed 168-byte region [ffff88800e213828, ffff88800e2138d0) [ 38.170328] [ 38.170541] The buggy address belongs to the physical page: [ 38.171193] page:00000000ec08de29 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe213 [ 38.172274] memcg:ffff88800e84fb01 [ 38.172699] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.173396] page_type: 0xffffffff() [ 38.173858] raw: 0100000000000200 ffff88800879fc80 ffffea00003b2040 dead000000000005 [ 38.174784] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e84fb01 [ 38.175681] page dumped because: kasan: bad access detected [ 38.176350] [ 38.176563] Memory state around the buggy address: [ 38.177145] ffff88800e213780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.178017] ffff88800e213800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.178872] >ffff88800e213880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.179723] ^ [ 38.180132] ffff88800e213900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.180983] ffff88800e213980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.181839] ================================================================== [ 38.182886] Disabling lock debugging due to kernel taint [ 39.956014] BUG: Bad rss-counter state mm:00000000aaf3b147 type:MM_FILEPAGES val:33 [ 39.956992] BUG: Bad rss-counter state mm:00000000aaf3b147 type:MM_ANONPAGES val:22 [ 40.415750] BUG: Bad rss-counter state mm:000000003c9fc9f8 type:MM_FILEPAGES val:33 [ 40.416771] BUG: Bad rss-counter state mm:000000003c9fc9f8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19068' (ECDSA) to the list of known hosts. 2023/06/20 02:21:20 fuzzer started 2023/06/20 02:21:21 dialing manager at localhost:44161 2023/06/20 02:21:21 checking machine... 2023/06/20 02:21:21 checking revisions... [ 41.137221] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:21:21 testing simple program... [ 41.176473] cgroup: Unknown subsys name 'net' [ 41.221918] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:21:13 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff86146436 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =ffffffff8614643a R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000023567 R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff8880143e79e0 R15=ffff88806ce09a50 RIP=ffffffff81130bd6 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 00007fb61953b900 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=0000562dd6769768 CR3=00000000102e8000 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=dd2221c1071f978b00000000000ae988 XMM05=95ee99ad689704ee00000000001364b0 XMM06=4fda316b135da52b0000000000135550 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000001255 RCX=ffffffff8171ac24 RDX=ffff88800efa51c0 RSI=0000000000000040 RDI=0000000000000000 RBP=ffff88800c9d2d98 RSP=ffff88800b957e70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000001 R13=0000562dd6761654 R14=ffff88800c9d2da8 R15=0000000000000040 RIP=ffffffff814c0388 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2676230900 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=0000562dd6761654 CR3=000000000ca32000 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=00000000000000000000562dd5ec8060 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000