[ 39.107007] BUG: Bad rss-counter state mm:000000005920ae8b type:MM_FILEPAGES val:33 [ 39.108032] BUG: Bad rss-counter state mm:000000005920ae8b type:MM_ANONPAGES val:22 [ 39.269419] ================================================================== [ 39.270346] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.271301] Read of size 8 at addr ffff88800df03310 by task sshd/220 [ 39.272224] [ 39.272448] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.273366] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.274373] Call Trace: [ 39.274691] [ 39.274977] dump_stack_lvl+0x91/0xf0 [ 39.275468] print_report+0xcc/0x620 [ 39.275958] ? __virt_addr_valid+0x102/0x340 [ 39.276550] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.277173] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.277789] kasan_report+0xbe/0xf0 [ 39.278283] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.278924] vma_interval_tree_remove+0xc75/0xec0 [ 39.279526] vma_prepare+0xc54/0x11a0 [ 39.280005] __split_vma+0x5af/0x950 [ 39.280485] ? __pfx___split_vma+0x10/0x10 [ 39.281011] ? find_held_lock+0x2c/0x110 [ 39.281527] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.282096] ? lock_is_held_type+0x9f/0x120 [ 39.282634] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.283240] ? mtree_range_walk+0x632/0x900 [ 39.283787] ? mas_walk+0x5c7/0x7c0 [ 39.284273] do_vmi_munmap+0x1f1/0x2b0 [ 39.284763] mmap_region+0x1f9/0x2660 [ 39.285251] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.285767] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.286476] ? __pfx_lock_acquire+0x10/0x10 [ 39.287014] ? __pfx_mmap_region+0x10/0x10 [ 39.287552] ? security_mmap_addr+0x7d/0xa0 [ 39.288102] ? get_unmapped_area+0x1f5/0x3f0 [ 39.288655] do_mmap+0x854/0xf00 [ 39.289096] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.289604] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.290176] ksys_mmap_pgoff+0x3af/0x500 [ 39.290690] do_syscall_64+0x3f/0x90 [ 39.291170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.291810] RIP: 0033:0x7f82324f9d82 [ 39.292281] 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 [ 39.294390] RSP: 002b:00007fff70bdd278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.295297] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f82324f9d82 [ 39.296147] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8231933000 [ 39.296995] RBP: 00007f8231933000 R08: 0000000000000009 R09: 0000000000001000 [ 39.297836] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563b93730ec0 [ 39.298682] R13: 00007fff70bdd290 R14: 00007fff70bdd2c0 R15: 00007fff70bdd620 [ 39.299550] [ 39.299841] [ 39.300058] Allocated by task 213: [ 39.300511] kasan_save_stack+0x22/0x50 [ 39.301018] kasan_set_track+0x25/0x30 [ 39.301514] __kasan_slab_alloc+0x59/0x70 [ 39.302044] kmem_cache_alloc+0x16b/0x370 [ 39.302569] vm_area_dup+0x20/0x160 [ 39.303029] __split_vma+0x170/0x950 [ 39.303503] split_vma+0xc6/0x110 [ 39.303950] mprotect_fixup+0x8d2/0xb30 [ 39.304469] do_mprotect_pkey+0x87e/0xd40 [ 39.304995] __x64_sys_mprotect+0x78/0xc0 [ 39.305518] do_syscall_64+0x3f/0x90 [ 39.305999] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.306654] [ 39.306875] Freed by task 213: [ 39.307267] kasan_save_stack+0x22/0x50 [ 39.307768] kasan_set_track+0x25/0x30 [ 39.308281] kasan_save_free_info+0x2b/0x50 [ 39.308826] __kasan_slab_free+0x10a/0x190 [ 39.309363] kmem_cache_free+0x10d/0x4d0 [ 39.309869] rcu_core+0x8c8/0x2860 [ 39.310320] __do_softirq+0x1b7/0x7d4 [ 39.310798] [ 39.311012] Last potentially related work creation: [ 39.311606] kasan_save_stack+0x22/0x50 [ 39.312131] __kasan_record_aux_stack+0x8e/0xa0 [ 39.312713] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.313361] remove_vma+0x139/0x170 [ 39.313813] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.314370] do_vmi_munmap+0x1f1/0x2b0 [ 39.314873] __vm_munmap+0x138/0x3a0 [ 39.315352] __x64_sys_munmap+0x59/0x80 [ 39.315856] do_syscall_64+0x3f/0x90 [ 39.316354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.316999] [ 39.317223] The buggy address belongs to the object at ffff88800df032b8 [ 39.317223] which belongs to the cache vm_area_struct of size 168 [ 39.318735] The buggy address is located 88 bytes inside of [ 39.318735] freed 168-byte region [ffff88800df032b8, ffff88800df03360) [ 39.320175] [ 39.320400] The buggy address belongs to the physical page: [ 39.321072] page:000000001ec475b8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf03 [ 39.322151] memcg:ffff88800e3dff01 [ 39.322572] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.323216] page_type: 0xffffffff() [ 39.323664] raw: 0100000000000200 ffff88800879fc80 ffffea000037b9c0 dead000000000006 [ 39.324597] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3dff01 [ 39.325499] page dumped because: kasan: bad access detected [ 39.326160] [ 39.326376] Memory state around the buggy address: [ 39.326952] ffff88800df03200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.327806] ffff88800df03280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.328672] >ffff88800df03300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.329525] ^ [ 39.329990] ffff88800df03380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.330853] ffff88800df03400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 39.331706] ================================================================== [ 39.332764] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 41.193524] BUG: Bad rss-counter state mm:00000000839940ca type:MM_FILEPAGES val:33 [ 41.194535] BUG: Bad rss-counter state mm:00000000839940ca type:MM_ANONPAGES val:22 [ 41.646221] BUG: Bad rss-counter state mm:00000000614eaca3 type:MM_FILEPAGES val:33 [ 41.647157] BUG: Bad rss-counter state mm:00000000614eaca3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50028' (ECDSA) to the list of known hosts. 2023/06/20 00:55:50 fuzzer started 2023/06/20 00:55:51 dialing manager at localhost:44161 2023/06/20 00:55:51 checking machine... 2023/06/20 00:55:51 checking revisions... [ 42.354178] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:55:51 testing simple program... [ 42.409022] cgroup: Unknown subsys name 'net' [ 42.447580] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:55:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff810001ce RCX=0000000000000001 RDX=1ffff1100d9c135a RSI=ffffffff85407f40 RDI=ffffffff810001ce RBP=ffff88806ce09ad0 RSP=ffff88806ce09a48 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffff88806ce09b40 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800e1d5d00 RIP=ffffffff811fc7a0 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=00007ffd2256dbb8 CR3=00000000168ec000 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=2030353a35353a3030203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a35353a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000060003 RCX=ffffffff8186d10e RDX=ffff88800f59d1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888018b6fd88 RSP=ffff888018b6fd40 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800e5d9680 R13=ffff888018b6fde0 R14=ffffffff84d2fa00 R15=0000000000000000 RIP=ffffffff814c07eb 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 00007f29e75ad900 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=00007f29e7b650b0 CR3=000000001bc78000 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