syzkaller login: [ 30.735327] BUG: Bad rss-counter state mm:00000000a77f5362 type:MM_FILEPAGES val:33 [ 30.736766] BUG: Bad rss-counter state mm:00000000a77f5362 type:MM_ANONPAGES val:22 [ 30.910207] ================================================================== [ 30.911179] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.912179] Read of size 8 at addr ffff888016569b38 by task sshd/221 [ 30.913102] [ 30.913338] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.914271] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.915324] Call Trace: [ 30.915672] [ 30.916001] dump_stack_lvl+0x91/0xf0 [ 30.916520] print_report+0xcc/0x620 [ 30.917030] ? __virt_addr_valid+0x102/0x340 [ 30.917603] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.918252] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.918901] kasan_report+0xbe/0xf0 [ 30.919412] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.920080] vma_interval_tree_remove+0xc75/0xec0 [ 30.920717] vma_prepare+0xc54/0x11a0 [ 30.921229] __split_vma+0x5af/0x950 [ 30.921733] ? __pfx___split_vma+0x10/0x10 [ 30.922303] ? find_held_lock+0x2c/0x110 [ 30.922862] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.923471] ? lock_is_held_type+0x9f/0x120 [ 30.924052] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.924700] ? mtree_range_walk+0x632/0x900 [ 30.925286] ? mas_walk+0x5c7/0x7c0 [ 30.925794] do_vmi_munmap+0x1f1/0x2b0 [ 30.926314] mmap_region+0x1f9/0x2660 [ 30.926826] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.927368] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.928151] ? __pfx_lock_acquire+0x10/0x10 [ 30.928724] ? __pfx_mmap_region+0x10/0x10 [ 30.929286] ? security_mmap_addr+0x7d/0xa0 [ 30.929853] ? get_unmapped_area+0x1f5/0x3f0 [ 30.930437] do_mmap+0x854/0xf00 [ 30.930903] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.931430] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.932042] ksys_mmap_pgoff+0x3af/0x500 [ 30.932586] do_syscall_64+0x3f/0x90 [ 30.933089] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.933782] RIP: 0033:0x7f513f913d82 [ 30.934271] 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 [ 30.936533] RSP: 002b:00007ffd526b31b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.937492] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f513f913d82 [ 30.938390] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f513ed4d000 [ 30.939299] RBP: 00007f513ed4d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.940223] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564db01e9f70 [ 30.941121] R13: 00007ffd526b31d0 R14: 00007ffd526b3200 R15: 00007ffd526b3560 [ 30.942039] [ 30.942352] [ 30.942584] Allocated by task 212: [ 30.943040] kasan_save_stack+0x22/0x50 [ 30.943583] kasan_set_track+0x25/0x30 [ 30.944114] __kasan_slab_alloc+0x59/0x70 [ 30.944669] kmem_cache_alloc+0x16b/0x370 [ 30.945218] vm_area_dup+0x20/0x160 [ 30.945709] __split_vma+0x170/0x950 [ 30.946201] split_vma+0xc6/0x110 [ 30.946668] mprotect_fixup+0x8d2/0xb30 [ 30.947201] do_mprotect_pkey+0x87e/0xd40 [ 30.947758] __x64_sys_mprotect+0x78/0xc0 [ 30.948331] do_syscall_64+0x3f/0x90 [ 30.948839] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.949524] [ 30.949759] Freed by task 13: [ 30.950165] kasan_save_stack+0x22/0x50 [ 30.950700] kasan_set_track+0x25/0x30 [ 30.951223] kasan_save_free_info+0x2b/0x50 [ 30.951790] __kasan_slab_free+0x10a/0x190 [ 30.952369] kmem_cache_free+0x10d/0x4d0 [ 30.952916] rcu_core+0x8c8/0x2860 [ 30.953388] __do_softirq+0x1b7/0x7d4 [ 30.953898] [ 30.954137] Last potentially related work creation: [ 30.954754] kasan_save_stack+0x22/0x50 [ 30.955291] __kasan_record_aux_stack+0x8e/0xa0 [ 30.955909] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.956622] remove_vma+0x139/0x170 [ 30.957104] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.957705] do_vmi_munmap+0x1f1/0x2b0 [ 30.958227] __vm_munmap+0x138/0x3a0 [ 30.958728] __x64_sys_munmap+0x59/0x80 [ 30.959277] do_syscall_64+0x3f/0x90 [ 30.959778] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.960478] [ 30.960700] Second to last potentially related work creation: [ 30.961429] kasan_save_stack+0x22/0x50 [ 30.961959] __kasan_record_aux_stack+0x8e/0xa0 [ 30.962586] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.963281] remove_vma+0x139/0x170 [ 30.963767] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.964402] do_vmi_munmap+0x1f1/0x2b0 [ 30.964915] mmap_region+0x1f9/0x2660 [ 30.965420] do_mmap+0x854/0xf00 [ 30.965887] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.966412] ksys_mmap_pgoff+0x3af/0x500 [ 30.966948] do_syscall_64+0x3f/0x90 [ 30.967447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.968154] [ 30.968383] The buggy address belongs to the object at ffff888016569ae0 [ 30.968383] which belongs to the cache vm_area_struct of size 168 [ 30.970000] The buggy address is located 88 bytes inside of [ 30.970000] freed 168-byte region [ffff888016569ae0, ffff888016569b88) [ 30.971509] [ 30.971738] The buggy address belongs to the physical page: [ 30.972469] page:00000000d2921a1f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16569 [ 30.973631] memcg:ffff888016631d01 [ 30.974084] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.974772] page_type: 0xffffffff() [ 30.975253] raw: 0100000000000200 ffff8880087a0c80 ffffea000059e5c0 dead000000000006 [ 30.976259] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016631d01 [ 30.977232] page dumped because: kasan: bad access detected [ 30.977936] [ 30.978173] Memory state around the buggy address: [ 30.978802] ffff888016569a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.979719] ffff888016569a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.980651] >ffff888016569b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.981559] ^ [ 30.982199] ffff888016569b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 30.983110] ffff888016569c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.984017] ================================================================== [ 30.985050] Disabling lock debugging due to kernel taint [ 32.927849] BUG: Bad rss-counter state mm:0000000054e6a1da type:MM_FILEPAGES val:33 [ 32.929084] BUG: Bad rss-counter state mm:0000000054e6a1da type:MM_ANONPAGES val:22 [ 33.373139] BUG: Bad rss-counter state mm:00000000acdbbda4 type:MM_FILEPAGES val:33 [ 33.374343] BUG: Bad rss-counter state mm:00000000acdbbda4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47410' (ECDSA) to the list of known hosts. 2023/06/21 03:44:33 fuzzer started 2023/06/21 03:44:33 dialing manager at localhost:36067 2023/06/21 03:44:33 checking machine... 2023/06/21 03:44:33 checking revisions... [ 34.136349] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:44:33 testing simple program... [ 34.193303] cgroup: Unknown subsys name 'net' [ 34.237136] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:44:33 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=00000000daacc417 RCX=ffff88806ca620b8 RDX=0000000000000007 RSI=ffffffff8180f5bb RDI=000000008f1e5e59 RBP=ffff8880087f83c0 RSP=ffff888008d9fa48 R8 =0000000023c0916b R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000000128 R12=0000000000000001 R13=0000000000000000 R14=ffff888008d9fab0 R15=0000000000000007 RIP=ffffffff82270500 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 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=00007ffee05997d8 CR3=0000000009070000 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=2033333a34343a3330203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a34343a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf3de20 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88806cf3de20 RBP=ffff88800a0bfbf0 RSP=ffff88800a0bfb18 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3d357 R11=ffff888018c4b260 R12=ffff88800844f780 R13=ffff88800e70f4c0 R14=ffff88806cf3de20 R15=ffff88806cf3de00 RIP=ffffffff812d8e70 RFL=00000082 [--S----] 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 00007fa529858900 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=00007fa529e100b0 CR3=000000000a032000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000