syzkaller login: [ 43.904907] BUG: Bad rss-counter state mm:000000002e16d0a1 type:MM_FILEPAGES val:33 [ 43.906325] BUG: Bad rss-counter state mm:000000002e16d0a1 type:MM_ANONPAGES val:22 [ 44.076840] ================================================================== [ 44.077985] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.079088] Read of size 8 at addr ffff88800e722b38 by task sshd/220 [ 44.079959] [ 44.080183] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.081058] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.082122] Call Trace: [ 44.082448] [ 44.082747] dump_stack_lvl+0x91/0xf0 [ 44.083245] print_report+0xcc/0x620 [ 44.083744] ? __virt_addr_valid+0x102/0x340 [ 44.084306] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.084941] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.085574] kasan_report+0xbe/0xf0 [ 44.086084] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.086713] vma_interval_tree_remove+0xc75/0xec0 [ 44.087319] vma_prepare+0xc54/0x11a0 [ 44.087798] __split_vma+0x5af/0x950 [ 44.088273] ? __pfx___split_vma+0x10/0x10 [ 44.088809] ? find_held_lock+0x2c/0x110 [ 44.089350] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.089947] ? lock_is_held_type+0x9f/0x120 [ 44.090493] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.091102] ? mtree_range_walk+0x632/0x900 [ 44.091656] ? mas_walk+0x5c7/0x7c0 [ 44.092128] do_vmi_munmap+0x1f1/0x2b0 [ 44.092624] mmap_region+0x1f9/0x2660 [ 44.093113] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.093628] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.094382] ? __pfx_lock_acquire+0x10/0x10 [ 44.094926] ? __pfx_mmap_region+0x10/0x10 [ 44.095468] ? security_mmap_addr+0x7d/0xa0 [ 44.096007] ? get_unmapped_area+0x1f5/0x3f0 [ 44.096565] do_mmap+0x854/0xf00 [ 44.097011] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.097510] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.098118] ksys_mmap_pgoff+0x3af/0x500 [ 44.098634] do_syscall_64+0x3f/0x90 [ 44.099123] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.099779] RIP: 0033:0x7fb763e9ad82 [ 44.100248] 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 [ 44.102464] RSP: 002b:00007ffcba279f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.103377] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb763e9ad82 [ 44.104248] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb7632d4000 [ 44.105108] RBP: 00007fb7632d4000 R08: 0000000000000009 R09: 0000000000001000 [ 44.105992] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564fd93fab20 [ 44.106842] R13: 00007ffcba279fa0 R14: 00007ffcba279fd0 R15: 00007ffcba27a330 [ 44.107709] [ 44.108009] [ 44.108224] Allocated by task 213: [ 44.108655] kasan_save_stack+0x22/0x50 [ 44.109159] kasan_set_track+0x25/0x30 [ 44.109651] __kasan_slab_alloc+0x59/0x70 [ 44.110203] kmem_cache_alloc+0x16b/0x370 [ 44.110729] vm_area_dup+0x20/0x160 [ 44.111184] __split_vma+0x170/0x950 [ 44.111645] split_vma+0xc6/0x110 [ 44.112081] mprotect_fixup+0x8d2/0xb30 [ 44.112576] do_mprotect_pkey+0x87e/0xd40 [ 44.113107] __x64_sys_mprotect+0x78/0xc0 [ 44.113629] do_syscall_64+0x3f/0x90 [ 44.114143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.114780] [ 44.114997] Freed by task 213: [ 44.115381] kasan_save_stack+0x22/0x50 [ 44.115878] kasan_set_track+0x25/0x30 [ 44.116372] kasan_save_free_info+0x2b/0x50 [ 44.116897] __kasan_slab_free+0x10a/0x190 [ 44.117424] kmem_cache_free+0x10d/0x4d0 [ 44.117934] rcu_core+0x8c8/0x2860 [ 44.118394] __do_softirq+0x1b7/0x7d4 [ 44.118873] [ 44.119095] Last potentially related work creation: [ 44.119679] kasan_save_stack+0x22/0x50 [ 44.120176] __kasan_record_aux_stack+0x8e/0xa0 [ 44.120747] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.121380] remove_vma+0x139/0x170 [ 44.121830] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.122427] do_vmi_munmap+0x1f1/0x2b0 [ 44.122920] __vm_munmap+0x138/0x3a0 [ 44.123390] __x64_sys_munmap+0x59/0x80 [ 44.123893] do_syscall_64+0x3f/0x90 [ 44.124368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.125009] [ 44.125225] The buggy address belongs to the object at ffff88800e722ae0 [ 44.125225] which belongs to the cache vm_area_struct of size 168 [ 44.126884] The buggy address is located 88 bytes inside of [ 44.126884] freed 168-byte region [ffff88800e722ae0, ffff88800e722b88) [ 44.128574] [ 44.128833] The buggy address belongs to the physical page: [ 44.129635] page:00000000fbb258b1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe722 [ 44.130999] memcg:ffff88800fb6e801 [ 44.131522] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.132306] page_type: 0xffffffff() [ 44.132852] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.133990] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fb6e801 [ 44.135099] page dumped because: kasan: bad access detected [ 44.135883] [ 44.136133] Memory state around the buggy address: [ 44.136811] ffff88800e722a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.137810] ffff88800e722a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 44.138927] >ffff88800e722b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.139922] ^ [ 44.140652] ffff88800e722b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 44.141643] ffff88800e722c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 44.142677] ================================================================== [ 44.143866] Disabling lock debugging due to kernel taint [ 46.177352] BUG: Bad rss-counter state mm:00000000bf0ffbd2 type:MM_FILEPAGES val:33 [ 46.178481] BUG: Bad rss-counter state mm:00000000bf0ffbd2 type:MM_ANONPAGES val:22 [ 46.549531] BUG: Bad rss-counter state mm:00000000f06035a7 type:MM_FILEPAGES val:33 [ 46.550500] BUG: Bad rss-counter state mm:00000000f06035a7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51469' (ECDSA) to the list of known hosts. 2023/06/19 18:56:40 fuzzer started 2023/06/19 18:56:40 dialing manager at localhost:44161 2023/06/19 18:56:40 checking machine... 2023/06/19 18:56:40 checking revisions... [ 47.267847] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:56:40 testing simple program... [ 47.326079] cgroup: Unknown subsys name 'net' [ 47.378062] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:56:27 Registers: info registers vcpu 0 RAX=0000000000000050 RBX=ffff888009b50000 RCX=0000000000000000 RDX=00000000000101f7 RSI=ffffffff821920cb RDI=0000000000000007 RBP=00000000000003e7 RSP=ffff88800f52f7d8 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f7 R11=0000000000000128 R12=00000000000101f7 R13=ffffed100136a001 R14=ffffffff85a237a0 R15=dffffc0000000000 RIP=ffffffff821920cf RFL=00000093 [--S-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 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=00007fdb88d51650 CR3=000000000f008000 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=36353a3831203931206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732039333a3635 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383635 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180c585 RBX=0000000000000001 RCX=ffffffff86137501 RDX=ffff888015b37970 RSI=ffffffff8180c585 RDI=ffff888015b37928 RBP=ffff888015b37980 RSP=ffff888015b378b8 R8 =ffffffff8613751e R9 =ffff888015b37968 R10=0000000000038001 R11=0000000000020d8a R12=ffff888015b379f0 R13=ffff888015b37970 R14=ffff88800d7e1b40 R15=ffff888015b37928 RIP=ffffffff81130641 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 00007fdb8879c900 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=00007ffdbc858000 CR3=000000000c744000 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