syzkaller login: [ 50.088022] BUG: Bad rss-counter state mm:00000000b6b4964b type:MM_FILEPAGES val:33 [ 50.089306] BUG: Bad rss-counter state mm:00000000b6b4964b type:MM_ANONPAGES val:22 [ 50.126983] ================================================================== [ 50.128012] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.129127] Read of size 8 at addr ffff88800c7144e0 by task sshd/220 [ 50.129952] [ 50.130179] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.131200] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.132236] Call Trace: [ 50.132596] [ 50.132933] dump_stack_lvl+0x91/0xf0 [ 50.133461] print_report+0xcc/0x620 [ 50.133996] ? __virt_addr_valid+0x102/0x340 [ 50.134647] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.135349] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.136082] kasan_report+0xbe/0xf0 [ 50.136620] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.137332] vma_interval_tree_remove+0xc75/0xec0 [ 50.137998] vma_prepare+0xc54/0x11a0 [ 50.138551] __split_vma+0x5af/0x950 [ 50.139066] ? __pfx___split_vma+0x10/0x10 [ 50.139659] ? find_held_lock+0x2c/0x110 [ 50.140248] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.140873] ? lock_is_held_type+0x9f/0x120 [ 50.141488] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.142156] ? mtree_range_walk+0x632/0x900 [ 50.142754] ? mas_walk+0x5c7/0x7c0 [ 50.143286] do_vmi_munmap+0x1f1/0x2b0 [ 50.143836] mmap_region+0x1f9/0x2660 [ 50.144379] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.144919] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.145712] ? __pfx_lock_acquire+0x10/0x10 [ 50.146302] ? __pfx_mmap_region+0x10/0x10 [ 50.146902] ? security_mmap_addr+0x7d/0xa0 [ 50.147509] ? get_unmapped_area+0x1f5/0x3f0 [ 50.148157] do_mmap+0x854/0xf00 [ 50.148652] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.149202] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.149824] ksys_mmap_pgoff+0x3af/0x500 [ 50.150387] do_syscall_64+0x3f/0x90 [ 50.150919] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.151624] RIP: 0033:0x7f7b99820d82 [ 50.152163] 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 [ 50.154524] RSP: 002b:00007ffc4015c868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.155656] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7b99820d82 [ 50.156604] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7b98c5a000 [ 50.157499] RBP: 00007f7b98c5a000 R08: 0000000000000009 R09: 0000000000001000 [ 50.158390] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ac2d7a5ec0 [ 50.159276] R13: 00007ffc4015c880 R14: 00007ffc4015c8b0 R15: 00007ffc4015cc10 [ 50.160172] [ 50.160490] [ 50.160717] Allocated by task 213: [ 50.161172] kasan_save_stack+0x22/0x50 [ 50.161700] kasan_set_track+0x25/0x30 [ 50.162223] __kasan_slab_alloc+0x59/0x70 [ 50.162839] kmem_cache_alloc+0x16b/0x370 [ 50.163454] vm_area_dup+0x20/0x160 [ 50.163998] __split_vma+0x170/0x950 [ 50.164562] split_vma+0xc6/0x110 [ 50.165079] mprotect_fixup+0x8d2/0xb30 [ 50.165683] do_mprotect_pkey+0x87e/0xd40 [ 50.166301] __x64_sys_mprotect+0x78/0xc0 [ 50.166914] do_syscall_64+0x3f/0x90 [ 50.167475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.168222] [ 50.168479] Freed by task 213: [ 50.168943] kasan_save_stack+0x22/0x50 [ 50.169527] kasan_set_track+0x25/0x30 [ 50.170116] kasan_save_free_info+0x2b/0x50 [ 50.170836] __kasan_slab_free+0x10a/0x190 [ 50.171602] kmem_cache_free+0x10d/0x4d0 [ 50.172320] rcu_core+0x8c8/0x2860 [ 50.172939] __do_softirq+0x1b7/0x7d4 [ 50.173600] [ 50.173903] Last potentially related work creation: [ 50.174747] kasan_save_stack+0x22/0x50 [ 50.175468] __kasan_record_aux_stack+0x8e/0xa0 [ 50.176302] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.177205] remove_vma+0x139/0x170 [ 50.177822] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.178583] do_vmi_munmap+0x1f1/0x2b0 [ 50.179229] __vm_munmap+0x138/0x3a0 [ 50.179855] __x64_sys_munmap+0x59/0x80 [ 50.180527] do_syscall_64+0x3f/0x90 [ 50.181166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.182041] [ 50.182326] Second to last potentially related work creation: [ 50.183248] kasan_save_stack+0x22/0x50 [ 50.183930] __kasan_record_aux_stack+0x8e/0xa0 [ 50.184722] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.185594] remove_vma+0x139/0x170 [ 50.186213] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.186972] do_vmi_munmap+0x1f1/0x2b0 [ 50.187620] mmap_region+0x1f9/0x2660 [ 50.188287] do_mmap+0x854/0xf00 [ 50.188880] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.189535] ksys_mmap_pgoff+0x3af/0x500 [ 50.190214] do_syscall_64+0x3f/0x90 [ 50.190855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.191729] [ 50.192021] The buggy address belongs to the object at ffff88800c714488 [ 50.192021] which belongs to the cache vm_area_struct of size 168 [ 50.194026] The buggy address is located 88 bytes inside of [ 50.194026] freed 168-byte region [ffff88800c714488, ffff88800c714530) [ 50.195889] [ 50.196198] The buggy address belongs to the physical page: [ 50.197149] page:00000000d1787c2e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc714 [ 50.198597] memcg:ffff888013f36c01 [ 50.199161] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 50.200112] page_type: 0xffffffff() [ 50.200703] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 50.201876] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f36c01 [ 50.203034] page dumped because: kasan: bad access detected [ 50.203916] [ 50.204208] Memory state around the buggy address: [ 50.205004] ffff88800c714380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 50.206125] ffff88800c714400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 50.207267] >ffff88800c714480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.208393] ^ [ 50.209412] ffff88800c714500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 50.210571] ffff88800c714580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 50.211675] ================================================================== [ 50.213062] Disabling lock debugging due to kernel taint [ 52.560210] BUG: Bad rss-counter state mm:00000000e1a8c95f type:MM_FILEPAGES val:33 [ 52.561430] BUG: Bad rss-counter state mm:00000000e1a8c95f type:MM_ANONPAGES val:22 [ 53.224713] BUG: Bad rss-counter state mm:000000003c331e6e type:MM_FILEPAGES val:33 [ 53.226161] BUG: Bad rss-counter state mm:000000003c331e6e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63898' (ECDSA) to the list of known hosts. 2023/06/20 08:33:22 fuzzer started 2023/06/20 08:33:22 dialing manager at localhost:44161 2023/06/20 08:33:22 checking machine... 2023/06/20 08:33:22 checking revisions... [ 54.006431] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:33:23 testing simple program... [ 54.061381] cgroup: Unknown subsys name 'net' [ 54.121965] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:33:03 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff856529e0 RCX=0000000080000000 RDX=ffff888014693680 RSI=ffffffff814c842f RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800d89f9e8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f236bb74477 R13=0000000000000000 R14=ffff888014693680 R15=ffff88800fd925f0 RIP=ffffffff814c07f1 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 00007f236b681900 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=00007f236bc36650 CR3=000000000f092000 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=ffffffff813ad6d0 RBX=ffffffff813ad420 RCX=ffff88801468fa50 RDX=1ffff110028d1f41 RSI=ffff88801468fa48 RDI=ffffffff813ad6d0 RBP=ffff88801468fa08 RSP=ffff88801468f9a0 R8 =0000000000000001 R9 =ffff88801468f9f0 R10=0000000000038001 R11=0000000000003c0d R12=ffff88801468fa78 R13=0000000000000000 R14=ffff888014690000 R15=ffff88800d289380 RIP=ffffffff811303b9 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff5b77e2900 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=00007ff5b6be6760 CR3=00000000097da000 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=ffffffffffffffffffffffffffffffff XMM01=00000000000000003033323d4449505f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=70531a4b85c1609c00000000000ae988 XMM05=e002eab5cee496bf0000000000136f40 XMM06=e4cb8bb95a7664b60000000000135dd8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000