syzkaller login: [ 31.433655] BUG: Bad rss-counter state mm:00000000eee1e324 type:MM_FILEPAGES val:33 [ 31.434868] BUG: Bad rss-counter state mm:00000000eee1e324 type:MM_ANONPAGES val:22 [ 31.583208] ================================================================== [ 31.584237] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.585540] Read of size 8 at addr ffff88800f033c20 by task sshd/220 [ 31.586407] [ 31.586657] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.587684] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.588803] Call Trace: [ 31.589163] [ 31.589484] dump_stack_lvl+0x91/0xf0 [ 31.590041] print_report+0xcc/0x620 [ 31.590595] ? __virt_addr_valid+0x102/0x340 [ 31.591233] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.591941] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.592650] kasan_report+0xbe/0xf0 [ 31.593189] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.593899] vma_interval_tree_remove+0xc75/0xec0 [ 31.594583] vma_prepare+0xc54/0x11a0 [ 31.595132] __split_vma+0x5af/0x950 [ 31.595673] ? __pfx___split_vma+0x10/0x10 [ 31.596278] ? find_held_lock+0x2c/0x110 [ 31.596869] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.597511] ? lock_is_held_type+0x9f/0x120 [ 31.598128] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.598830] ? mtree_range_walk+0x632/0x900 [ 31.599489] ? mas_walk+0x5c7/0x7c0 [ 31.600029] do_vmi_munmap+0x1f1/0x2b0 [ 31.600596] mmap_region+0x1f9/0x2660 [ 31.601143] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.601715] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.602523] ? __pfx_lock_acquire+0x10/0x10 [ 31.603126] ? __pfx_mmap_region+0x10/0x10 [ 31.603727] ? security_mmap_addr+0x7d/0xa0 [ 31.604318] ? get_unmapped_area+0x1f5/0x3f0 [ 31.604928] do_mmap+0x854/0xf00 [ 31.605417] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.605975] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.606602] ksys_mmap_pgoff+0x3af/0x500 [ 31.607178] do_syscall_64+0x3f/0x90 [ 31.607714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.608438] RIP: 0033:0x7f208f303d82 [ 31.608947] 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 [ 31.611337] RSP: 002b:00007ffcafb46538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.612367] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f208f303d82 [ 31.613343] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f208e73d000 [ 31.614287] RBP: 00007f208e73d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.615248] R10: 0000000000000812 R11: 0000000000000206 R12: 00005645459a1b20 [ 31.616185] R13: 00007ffcafb46550 R14: 00007ffcafb46580 R15: 00007ffcafb468e0 [ 31.617141] [ 31.617471] [ 31.617713] Allocated by task 213: [ 31.618193] kasan_save_stack+0x22/0x50 [ 31.618754] kasan_set_track+0x25/0x30 [ 31.619319] __kasan_slab_alloc+0x59/0x70 [ 31.619917] kmem_cache_alloc+0x16b/0x370 [ 31.620515] vm_area_dup+0x20/0x160 [ 31.621032] __split_vma+0x170/0x950 [ 31.621592] split_vma+0xc6/0x110 [ 31.622091] mprotect_fixup+0x8d2/0xb30 [ 31.622660] do_mprotect_pkey+0x87e/0xd40 [ 31.623258] __x64_sys_mprotect+0x78/0xc0 [ 31.623838] do_syscall_64+0x3f/0x90 [ 31.624435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.625161] [ 31.625404] Freed by task 213: [ 31.625851] kasan_save_stack+0x22/0x50 [ 31.626423] kasan_set_track+0x25/0x30 [ 31.626998] kasan_save_free_info+0x2b/0x50 [ 31.627592] __kasan_slab_free+0x10a/0x190 [ 31.628182] kmem_cache_free+0x10d/0x4d0 [ 31.628747] rcu_core+0x8c8/0x2860 [ 31.629246] __do_softirq+0x1b7/0x7d4 [ 31.629778] [ 31.630020] Last potentially related work creation: [ 31.630696] kasan_save_stack+0x22/0x50 [ 31.631280] __kasan_record_aux_stack+0x8e/0xa0 [ 31.631926] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.632606] remove_vma+0x139/0x170 [ 31.633080] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.633669] do_vmi_munmap+0x1f1/0x2b0 [ 31.634186] __vm_munmap+0x138/0x3a0 [ 31.634681] __x64_sys_munmap+0x59/0x80 [ 31.635221] do_syscall_64+0x3f/0x90 [ 31.635722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.636426] [ 31.636673] Second to last potentially related work creation: [ 31.637442] kasan_save_stack+0x22/0x50 [ 31.638024] __kasan_record_aux_stack+0x8e/0xa0 [ 31.638645] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.639333] remove_vma+0x139/0x170 [ 31.639832] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.640451] do_vmi_munmap+0x1f1/0x2b0 [ 31.640994] mmap_region+0x1f9/0x2660 [ 31.641529] do_mmap+0x854/0xf00 [ 31.642020] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.642572] ksys_mmap_pgoff+0x3af/0x500 [ 31.643145] do_syscall_64+0x3f/0x90 [ 31.643675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.644396] [ 31.644634] The buggy address belongs to the object at ffff88800f033bc8 [ 31.644634] which belongs to the cache vm_area_struct of size 168 [ 31.646266] The buggy address is located 88 bytes inside of [ 31.646266] freed 168-byte region [ffff88800f033bc8, ffff88800f033c70) [ 31.647885] [ 31.648126] The buggy address belongs to the physical page: [ 31.648864] page:0000000005a96508 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf033 [ 31.650069] memcg:ffff88800d913f01 [ 31.650542] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.651333] page_type: 0xffffffff() [ 31.651844] raw: 0100000000000200 ffff88800879fc80 ffffea00003154c0 dead000000000005 [ 31.652900] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d913f01 [ 31.653913] page dumped because: kasan: bad access detected [ 31.654608] [ 31.654835] Memory state around the buggy address: [ 31.655469] ffff88800f033b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.656364] ffff88800f033b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.657267] >ffff88800f033c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.658170] ^ [ 31.658734] ffff88800f033c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.659647] ffff88800f033d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.660613] ================================================================== [ 31.661745] Disabling lock debugging due to kernel taint [ 33.560569] BUG: Bad rss-counter state mm:000000009cca11b6 type:MM_FILEPAGES val:33 [ 33.562103] BUG: Bad rss-counter state mm:000000009cca11b6 type:MM_ANONPAGES val:22 [ 34.049345] BUG: Bad rss-counter state mm:000000002fffde81 type:MM_FILEPAGES val:33 [ 34.050336] BUG: Bad rss-counter state mm:000000002fffde81 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14680' (ECDSA) to the list of known hosts. 2023/06/19 10:59:38 fuzzer started 2023/06/19 10:59:38 dialing manager at localhost:44161 2023/06/19 10:59:38 checking machine... 2023/06/19 10:59:38 checking revisions... [ 34.788762] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:59:38 testing simple program... [ 34.834381] cgroup: Unknown subsys name 'net' [ 34.875967] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:59:37 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880146bf4f8 RCX=ffff8880146bf598 RDX=1ffff110028d7eaa RSI=ffff8880146bf590 RDI=ffff8880146bf4f8 RBP=ffff8880146bf550 RSP=ffff8880146bf4e0 R8 =0000000000000001 R9 =ffff8880146bf538 R10=0000000000038001 R11=0000000000003c0d R12=ffff8880146bf5c0 R13=0000000000000000 R14=ffff888018f4b680 R15=0000000000000200 RIP=ffffffff8113038e 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 00007fc150e3e900 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=00007fc1513f3650 CR3=0000000015df0000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f39f63fcf80 CR3=000000000cae2000 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=85c8c4447f746ab0d949d8a414980271 XMM02=000000000011cc98ec2efd57dc4c00df XMM03=0000000000123f40dffb7bba7af9b9c8 XMM04=074e89d90115f6b100000000000ae988 XMM05=fa815bd7438f3b080000000000135ea0 XMM06=4fda316b135da52b0000000000134f40 XMM07=e042d86d42eb936e00000000001241c0 XMM08=dffb7bba7af9b9c8000000000011ccf8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000