syzkaller login: [ 36.935747] BUG: Bad rss-counter state mm:00000000b780a01e type:MM_FILEPAGES val:33 [ 36.937147] BUG: Bad rss-counter state mm:00000000b780a01e type:MM_ANONPAGES val:22 [ 37.095057] ================================================================== [ 37.095975] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.096910] Read of size 8 at addr ffff888009a5ded8 by task sshd/219 [ 37.097669] [ 37.097892] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.098842] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.099810] Call Trace: [ 37.100137] [ 37.100431] dump_stack_lvl+0x91/0xf0 [ 37.100944] print_report+0xcc/0x620 [ 37.101431] ? __virt_addr_valid+0x102/0x340 [ 37.101983] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.102597] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.103220] kasan_report+0xbe/0xf0 [ 37.103693] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.104310] vma_interval_tree_remove+0xc75/0xec0 [ 37.104924] vma_prepare+0xc54/0x11a0 [ 37.105397] __split_vma+0x5af/0x950 [ 37.105865] ? __pfx___split_vma+0x10/0x10 [ 37.106399] ? find_held_lock+0x2c/0x110 [ 37.106924] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.107499] ? lock_is_held_type+0x9f/0x120 [ 37.108042] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.108654] ? mtree_range_walk+0x632/0x900 [ 37.109213] ? mas_walk+0x5c7/0x7c0 [ 37.109692] do_vmi_munmap+0x1f1/0x2b0 [ 37.110195] mmap_region+0x1f9/0x2660 [ 37.110687] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.111199] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.111916] ? __pfx_lock_acquire+0x10/0x10 [ 37.112444] ? __pfx_mmap_region+0x10/0x10 [ 37.113002] ? security_mmap_addr+0x7d/0xa0 [ 37.113537] ? get_unmapped_area+0x1f5/0x3f0 [ 37.114080] do_mmap+0x854/0xf00 [ 37.114525] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.115026] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.115584] ksys_mmap_pgoff+0x3af/0x500 [ 37.116101] do_syscall_64+0x3f/0x90 [ 37.116599] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.117240] RIP: 0033:0x7fdb6f61ad82 [ 37.117701] 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 [ 37.119822] RSP: 002b:00007ffd2067c158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.120743] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdb6f61ad82 [ 37.121582] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdb6ea54000 [ 37.122424] RBP: 00007fdb6ea54000 R08: 0000000000000009 R09: 0000000000001000 [ 37.123260] R10: 0000000000000812 R11: 0000000000000206 R12: 00005575fad20ec0 [ 37.124106] R13: 00007ffd2067c170 R14: 00007ffd2067c1a0 R15: 00007ffd2067c500 [ 37.124966] [ 37.125259] [ 37.125471] Allocated by task 212: [ 37.125894] kasan_save_stack+0x22/0x50 [ 37.126409] kasan_set_track+0x25/0x30 [ 37.126903] __kasan_slab_alloc+0x59/0x70 [ 37.127427] kmem_cache_alloc+0x16b/0x370 [ 37.127941] vm_area_dup+0x20/0x160 [ 37.128405] __split_vma+0x170/0x950 [ 37.128877] split_vma+0xc6/0x110 [ 37.129311] mprotect_fixup+0x8d2/0xb30 [ 37.129817] do_mprotect_pkey+0x87e/0xd40 [ 37.130329] __x64_sys_mprotect+0x78/0xc0 [ 37.130866] do_syscall_64+0x3f/0x90 [ 37.131343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.131984] [ 37.132202] Freed by task 212: [ 37.132610] kasan_save_stack+0x22/0x50 [ 37.133113] kasan_set_track+0x25/0x30 [ 37.133603] kasan_save_free_info+0x2b/0x50 [ 37.134135] __kasan_slab_free+0x10a/0x190 [ 37.134662] kmem_cache_free+0x10d/0x4d0 [ 37.135171] rcu_core+0x8c8/0x2860 [ 37.135622] __do_softirq+0x1b7/0x7d4 [ 37.136095] [ 37.136309] Last potentially related work creation: [ 37.136896] kasan_save_stack+0x22/0x50 [ 37.137395] __kasan_record_aux_stack+0x8e/0xa0 [ 37.137968] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.138612] remove_vma+0x139/0x170 [ 37.139058] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.139621] do_vmi_munmap+0x1f1/0x2b0 [ 37.140104] __vm_munmap+0x138/0x3a0 [ 37.140597] __x64_sys_munmap+0x59/0x80 [ 37.141088] do_syscall_64+0x3f/0x90 [ 37.141559] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.142202] [ 37.142420] Second to last potentially related work creation: [ 37.143108] kasan_save_stack+0x22/0x50 [ 37.143612] __kasan_record_aux_stack+0x8e/0xa0 [ 37.144183] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.144831] remove_vma+0x139/0x170 [ 37.145279] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.145830] do_vmi_munmap+0x1f1/0x2b0 [ 37.146320] mmap_region+0x1f9/0x2660 [ 37.146799] do_mmap+0x854/0xf00 [ 37.147223] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.147715] ksys_mmap_pgoff+0x3af/0x500 [ 37.148216] do_syscall_64+0x3f/0x90 [ 37.148707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.149341] [ 37.149557] The buggy address belongs to the object at ffff888009a5de80 [ 37.149557] which belongs to the cache vm_area_struct of size 168 [ 37.151028] The buggy address is located 88 bytes inside of [ 37.151028] freed 168-byte region [ffff888009a5de80, ffff888009a5df28) [ 37.152412] [ 37.152642] The buggy address belongs to the physical page: [ 37.153298] page:0000000004c568c3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a5d [ 37.154377] memcg:ffff88800de07601 [ 37.154803] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.155504] page_type: 0xffffffff() [ 37.155954] raw: 0100000000000200 ffff88800879fc80 ffffea0000330600 dead000000000005 [ 37.156890] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de07601 [ 37.157797] page dumped because: kasan: bad access detected [ 37.158455] [ 37.158670] Memory state around the buggy address: [ 37.159242] ffff888009a5dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 37.160094] ffff888009a5de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 37.160947] >ffff888009a5de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.161791] ^ [ 37.162519] ffff888009a5df00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 37.163365] ffff888009a5df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 37.164210] ================================================================== [ 37.165244] Disabling lock debugging due to kernel taint [ 38.991576] BUG: Bad rss-counter state mm:0000000052184638 type:MM_FILEPAGES val:33 [ 38.992732] BUG: Bad rss-counter state mm:0000000052184638 type:MM_ANONPAGES val:22 [ 39.325050] BUG: Bad rss-counter state mm:00000000b41ea5e6 type:MM_FILEPAGES val:33 [ 39.326043] BUG: Bad rss-counter state mm:00000000b41ea5e6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9225' (ECDSA) to the list of known hosts. 2023/06/20 00:31:41 fuzzer started 2023/06/20 00:31:41 dialing manager at localhost:44161 2023/06/20 00:31:41 checking machine... 2023/06/20 00:31:41 checking revisions... [ 40.003013] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:31:41 testing simple program... [ 40.059194] cgroup: Unknown subsys name 'net' [ 40.109557] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:31:34 Registers: info registers vcpu 0 RAX=1ffffffff0bb783e RBX=ffffffff85dbc1f4 RCX=ffffffff813ad6cf RDX=0000000000000000 RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffffffff85dbc1f4 RSP=ffff88801d13f8a0 R8 =ffffffff860d68c0 R9 =ffff88801d13f998 R10=0000000000038001 R11=0000000000010b7e R12=ffffffff85dbc1f4 R13=ffffffff85dbc1cc R14=ffffffff85dbc1f0 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] 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 00007fdd14d7a900 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=00007fdcf33cef70 CR3=000000001bedc000 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=ff0000000000ffff0000000000ff0000 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 info registers vcpu 1 RAX=1ffff110022a8943 RBX=ffff8880115449e8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888011544a18 RBP=ffff88800de2f140 RSP=ffff88806cf09d88 R8 =0000000000000001 R9 =ffffed100d9e13a5 R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88800de2f140 R14=ffffffff81ef2884 R15=ffff88801013c180 RIP=ffffffff81846362 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 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=00007fff45b24ff8 CR3=000000000d86a000 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=2030343a31333a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a31333a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000