syzkaller login: [ 30.477704] BUG: Bad rss-counter state mm:000000000fe221a7 type:MM_FILEPAGES val:33 [ 30.479166] BUG: Bad rss-counter state mm:000000000fe221a7 type:MM_ANONPAGES val:22 [ 30.642244] ================================================================== [ 30.643331] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.644427] Read of size 8 at addr ffff88800e4da310 by task sshd/220 [ 30.645461] [ 30.645718] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.646742] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.647743] Call Trace: [ 30.648062] [ 30.648342] dump_stack_lvl+0x91/0xf0 [ 30.648838] print_report+0xcc/0x620 [ 30.649338] ? __virt_addr_valid+0x102/0x340 [ 30.649913] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.650523] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.651135] kasan_report+0xbe/0xf0 [ 30.651601] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.652209] vma_interval_tree_remove+0xc75/0xec0 [ 30.652805] vma_prepare+0xc54/0x11a0 [ 30.653278] __split_vma+0x5af/0x950 [ 30.653765] ? __pfx___split_vma+0x10/0x10 [ 30.654287] ? find_held_lock+0x2c/0x110 [ 30.654801] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.655352] ? lock_is_held_type+0x9f/0x120 [ 30.655894] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.656507] ? mtree_range_walk+0x632/0x900 [ 30.657052] ? mas_walk+0x5c7/0x7c0 [ 30.657530] do_vmi_munmap+0x1f1/0x2b0 [ 30.658013] mmap_region+0x1f9/0x2660 [ 30.658501] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.659008] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.659719] ? __pfx_lock_acquire+0x10/0x10 [ 30.660266] ? __pfx_mmap_region+0x10/0x10 [ 30.660820] ? security_mmap_addr+0x7d/0xa0 [ 30.661350] ? get_unmapped_area+0x1f5/0x3f0 [ 30.661927] do_mmap+0x854/0xf00 [ 30.662358] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.662850] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.663404] ksys_mmap_pgoff+0x3af/0x500 [ 30.663905] do_syscall_64+0x3f/0x90 [ 30.664382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.665059] RIP: 0033:0x7fcbea0d7d82 [ 30.665521] 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 [ 30.667655] RSP: 002b:00007fff2ef5ca38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.668543] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcbea0d7d82 [ 30.669382] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcbe9511000 [ 30.670255] RBP: 00007fcbe9511000 R08: 0000000000000009 R09: 0000000000001000 [ 30.671128] R10: 0000000000000812 R11: 0000000000000206 R12: 000055be35830d90 [ 30.671962] R13: 00007fff2ef5ca50 R14: 00007fff2ef5ca80 R15: 00007fff2ef5cde0 [ 30.672813] [ 30.673101] [ 30.673314] Allocated by task 212: [ 30.673744] kasan_save_stack+0x22/0x50 [ 30.674242] kasan_set_track+0x25/0x30 [ 30.674730] __kasan_slab_alloc+0x59/0x70 [ 30.675248] kmem_cache_alloc+0x16b/0x370 [ 30.675752] vm_area_dup+0x20/0x160 [ 30.676206] __split_vma+0x170/0x950 [ 30.676662] split_vma+0xc6/0x110 [ 30.677092] mprotect_fixup+0x8d2/0xb30 [ 30.677600] do_mprotect_pkey+0x87e/0xd40 [ 30.678121] __x64_sys_mprotect+0x78/0xc0 [ 30.678634] do_syscall_64+0x3f/0x90 [ 30.679107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.679737] [ 30.679951] Freed by task 212: [ 30.680341] kasan_save_stack+0x22/0x50 [ 30.680833] kasan_set_track+0x25/0x30 [ 30.681322] kasan_save_free_info+0x2b/0x50 [ 30.681866] __kasan_slab_free+0x10a/0x190 [ 30.682395] kmem_cache_free+0x10d/0x4d0 [ 30.682893] rcu_core+0x8c8/0x2860 [ 30.683344] __do_softirq+0x1b7/0x7d4 [ 30.683814] [ 30.684028] Last potentially related work creation: [ 30.684614] kasan_save_stack+0x22/0x50 [ 30.685108] __kasan_record_aux_stack+0x8e/0xa0 [ 30.685686] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.686380] remove_vma+0x139/0x170 [ 30.686830] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.687383] do_vmi_munmap+0x1f1/0x2b0 [ 30.687864] __vm_munmap+0x138/0x3a0 [ 30.688330] __x64_sys_munmap+0x59/0x80 [ 30.688820] do_syscall_64+0x3f/0x90 [ 30.689295] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.689960] [ 30.690173] Second to last potentially related work creation: [ 30.690847] kasan_save_stack+0x22/0x50 [ 30.691350] __kasan_record_aux_stack+0x8e/0xa0 [ 30.691915] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.692551] remove_vma+0x139/0x170 [ 30.693000] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.693561] do_vmi_munmap+0x1f1/0x2b0 [ 30.694041] mmap_region+0x1f9/0x2660 [ 30.694516] do_mmap+0x854/0xf00 [ 30.694941] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.695433] ksys_mmap_pgoff+0x3af/0x500 [ 30.695937] do_syscall_64+0x3f/0x90 [ 30.696402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.697040] [ 30.697252] The buggy address belongs to the object at ffff88800e4da2b8 [ 30.697252] which belongs to the cache vm_area_struct of size 168 [ 30.698849] The buggy address is located 88 bytes inside of [ 30.698849] freed 168-byte region [ffff88800e4da2b8, ffff88800e4da360) [ 30.700306] [ 30.700519] The buggy address belongs to the physical page: [ 30.701138] page:00000000ac2c8355 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4da [ 30.702178] memcg:ffff88800ef99201 [ 30.702579] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.703184] page_type: 0xffffffff() [ 30.703610] raw: 0100000000000200 ffff88800879fc80 ffffea000025ec80 dead000000000008 [ 30.704473] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef99201 [ 30.705319] page dumped because: kasan: bad access detected [ 30.705945] [ 30.706150] Memory state around the buggy address: [ 30.706699] ffff88800e4da200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.707502] ffff88800e4da280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.708309] >ffff88800e4da300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.709149] ^ [ 30.709609] ffff88800e4da380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.710454] ffff88800e4da400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.711280] ================================================================== [ 30.712207] Disabling lock debugging due to kernel taint [ 33.150785] BUG: Bad rss-counter state mm:000000000867f3b3 type:MM_FILEPAGES val:33 [ 33.151762] BUG: Bad rss-counter state mm:000000000867f3b3 type:MM_ANONPAGES val:22 [ 33.571588] BUG: Bad rss-counter state mm:00000000c314f3c3 type:MM_FILEPAGES val:33 [ 33.572793] BUG: Bad rss-counter state mm:00000000c314f3c3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60312' (ECDSA) to the list of known hosts. 2023/06/19 15:39:13 fuzzer started 2023/06/19 15:39:14 dialing manager at localhost:44161 2023/06/19 15:39:14 checking machine... 2023/06/19 15:39:14 checking revisions... [ 34.306840] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:39:14 testing simple program... [ 34.362631] cgroup: Unknown subsys name 'net' [ 34.421931] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:39:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=1ffff1100d9c135a RDX=dffffc0000000000 RSI=ffffffff8363de43 RDI=ffff88806ce09a78 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=000000000008a96b R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88806ce09ab9 R15=ffff88806ce09a78 RIP=ffffffff81130706 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 00007f4035198900 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=00007f403574d650 CR3=00000000146d6000 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=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 info registers vcpu 1 RAX=ffffffff86136d81 RBX=0000000000000001 RCX=ffffffff86136d7c RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800d66f580 RSP=ffff88800d66f4b8 R8 =ffffffff86136d80 R9 =ffff88800d66f568 R10=0000000000038001 R11=0000000000020c48 R12=ffff88800d66f588 R13=ffff88800d66f570 R14=ffff88800d66f908 R15=ffff88800d66f528 RIP=ffffffff81131134 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 00007fd00564c700 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=00007fff2d0bbff8 CR3=0000000014658000 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=2033313a39333a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a39333a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000