syzkaller login: [ 31.120473] BUG: Bad rss-counter state mm:000000006c417ba4 type:MM_FILEPAGES val:33 [ 31.121676] BUG: Bad rss-counter state mm:000000006c417ba4 type:MM_ANONPAGES val:22 [ 31.159277] ================================================================== [ 31.160308] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.161284] Read of size 8 at addr ffff888017c405c8 by task sshd/221 [ 31.162139] [ 31.162382] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.163249] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.164247] Call Trace: [ 31.164568] [ 31.164856] dump_stack_lvl+0x91/0xf0 [ 31.165348] print_report+0xcc/0x620 [ 31.165836] ? __virt_addr_valid+0x102/0x340 [ 31.166412] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.167033] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.167663] kasan_report+0xbe/0xf0 [ 31.168152] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.168782] vma_interval_tree_remove+0xc75/0xec0 [ 31.169388] vma_prepare+0xc54/0x11a0 [ 31.169876] __split_vma+0x5af/0x950 [ 31.170361] ? __pfx___split_vma+0x10/0x10 [ 31.170917] ? find_held_lock+0x2c/0x110 [ 31.171463] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.172065] ? lock_is_held_type+0x9f/0x120 [ 31.172639] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.173278] ? mtree_range_walk+0x632/0x900 [ 31.173870] ? mas_walk+0x5c7/0x7c0 [ 31.174396] do_vmi_munmap+0x1f1/0x2b0 [ 31.174917] mmap_region+0x1f9/0x2660 [ 31.175428] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.175964] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.176724] ? __pfx_lock_acquire+0x10/0x10 [ 31.177293] ? __pfx_mmap_region+0x10/0x10 [ 31.177847] ? security_mmap_addr+0x7d/0xa0 [ 31.178413] ? get_unmapped_area+0x1f5/0x3f0 [ 31.178990] do_mmap+0x854/0xf00 [ 31.179463] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.179990] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.180586] ksys_mmap_pgoff+0x3af/0x500 [ 31.181128] do_syscall_64+0x3f/0x90 [ 31.181623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.182334] RIP: 0033:0x7f51745b8d82 [ 31.182826] 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 [ 31.185124] RSP: 002b:00007ffecf70c6e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.186092] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f51745b8d82 [ 31.186999] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f51739f2000 [ 31.187910] RBP: 00007f51739f2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.188824] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561c64a14f70 [ 31.189725] R13: 00007ffecf70c700 R14: 00007ffecf70c730 R15: 00007ffecf70ca90 [ 31.190661] [ 31.190975] [ 31.191202] Allocated by task 214: [ 31.191659] kasan_save_stack+0x22/0x50 [ 31.192194] kasan_set_track+0x25/0x30 [ 31.192725] __kasan_slab_alloc+0x59/0x70 [ 31.193270] kmem_cache_alloc+0x16b/0x370 [ 31.193817] vm_area_dup+0x20/0x160 [ 31.194312] __split_vma+0x170/0x950 [ 31.194793] split_vma+0xc6/0x110 [ 31.195250] mprotect_fixup+0x8d2/0xb30 [ 31.195793] do_mprotect_pkey+0x87e/0xd40 [ 31.196345] __x64_sys_mprotect+0x78/0xc0 [ 31.196892] do_syscall_64+0x3f/0x90 [ 31.197379] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.198065] [ 31.198308] Freed by task 214: [ 31.198730] kasan_save_stack+0x22/0x50 [ 31.199269] kasan_set_track+0x25/0x30 [ 31.199784] kasan_save_free_info+0x2b/0x50 [ 31.200335] __kasan_slab_free+0x10a/0x190 [ 31.200895] kmem_cache_free+0x10d/0x4d0 [ 31.201450] rcu_core+0x8c8/0x2860 [ 31.201919] __do_softirq+0x1b7/0x7d4 [ 31.202460] [ 31.202685] Last potentially related work creation: [ 31.203312] kasan_save_stack+0x22/0x50 [ 31.203837] __kasan_record_aux_stack+0x8e/0xa0 [ 31.204450] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.205126] remove_vma+0x139/0x170 [ 31.205593] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.206181] do_vmi_munmap+0x1f1/0x2b0 [ 31.206700] __vm_munmap+0x138/0x3a0 [ 31.207191] __x64_sys_munmap+0x59/0x80 [ 31.207719] do_syscall_64+0x3f/0x90 [ 31.208222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.208897] [ 31.209121] The buggy address belongs to the object at ffff888017c40570 [ 31.209121] which belongs to the cache vm_area_struct of size 168 [ 31.210702] The buggy address is located 88 bytes inside of [ 31.210702] freed 168-byte region [ffff888017c40570, ffff888017c40618) [ 31.212180] [ 31.212409] The buggy address belongs to the physical page: [ 31.213097] page:0000000076de533d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17c40 [ 31.214263] memcg:ffff88800d83a201 [ 31.214729] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.215424] page_type: 0xffffffff() [ 31.215908] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.216890] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d83a201 [ 31.217854] page dumped because: kasan: bad access detected [ 31.218566] [ 31.218792] Memory state around the buggy address: [ 31.219419] ffff888017c40480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.220321] ffff888017c40500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.221241] >ffff888017c40580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.222111] ^ [ 31.222793] ffff888017c40600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.223642] ffff888017c40680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.224487] ================================================================== [ 31.225529] Disabling lock debugging due to kernel taint [ 33.149381] BUG: Bad rss-counter state mm:00000000342689e5 type:MM_FILEPAGES val:33 [ 33.150511] BUG: Bad rss-counter state mm:00000000342689e5 type:MM_ANONPAGES val:22 [ 33.718727] BUG: Bad rss-counter state mm:00000000b8c8fc4b type:MM_FILEPAGES val:33 [ 33.719951] BUG: Bad rss-counter state mm:00000000b8c8fc4b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11450' (ECDSA) to the list of known hosts. 2023/06/21 01:44:01 fuzzer started 2023/06/21 01:44:01 dialing manager at localhost:36067 2023/06/21 01:44:01 checking machine... 2023/06/21 01:44:01 checking revisions... [ 34.350065] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:44:01 testing simple program... [ 34.402089] cgroup: Unknown subsys name 'net' [ 34.439711] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:44:01 Registers: info registers vcpu 0 RAX=ffff88801b864cb0 RBX=ffff888013966068 RCX=1ffff11001b46bdc RDX=dffffc0000000000 RSI=ffff8880191ca668 RDI=ffff888013966098 RBP=ffff88800da35eb0 RSP=ffff88801692f958 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff8880191ca630 R13=0000000000000000 R14=ffff88800c6edaf8 R15=ffff88800c6edab0 RIP=ffffffff81847688 RFL=00000046 [---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 00007fa8db424700 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=00007f27bf3a8b10 CR3=000000000db2a000 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=2031303a34343a3130203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a34343a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000001c RBX=ffffffff85dbd818 RCX=ffffffff813ad71f RDX=0000000000000000 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff88801674f920 R8 =ffffffff860d8256 R9 =ffff88801674fa18 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd814 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc5d RFL=00000212 [----A--] 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 00007facce2a6900 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=00007facce85b650 CR3=00000000166a8000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000