syzkaller login: [ 45.099090] BUG: Bad rss-counter state mm:00000000d8a86d6c type:MM_FILEPAGES val:33 [ 45.100284] BUG: Bad rss-counter state mm:00000000d8a86d6c type:MM_ANONPAGES val:22 [ 45.135382] ================================================================== [ 45.136392] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.137434] Read of size 8 at addr ffff88800ec3e798 by task sshd/220 [ 45.138283] [ 45.138515] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.139436] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.140477] Call Trace: [ 45.140816] [ 45.141120] dump_stack_lvl+0x91/0xf0 [ 45.141642] print_report+0xcc/0x620 [ 45.142157] ? __virt_addr_valid+0x102/0x340 [ 45.142751] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.143411] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.144073] kasan_report+0xbe/0xf0 [ 45.144588] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.145263] vma_interval_tree_remove+0xc75/0xec0 [ 45.145923] vma_prepare+0xc54/0x11a0 [ 45.146450] __split_vma+0x5af/0x950 [ 45.146966] ? __pfx___split_vma+0x10/0x10 [ 45.147554] ? find_held_lock+0x2c/0x110 [ 45.148129] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.148750] ? lock_is_held_type+0x9f/0x120 [ 45.149350] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.150050] ? mtree_range_walk+0x632/0x900 [ 45.150653] ? mas_walk+0x5c7/0x7c0 [ 45.151181] do_vmi_munmap+0x1f1/0x2b0 [ 45.151720] mmap_region+0x1f9/0x2660 [ 45.152260] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.152817] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.153605] ? __pfx_lock_acquire+0x10/0x10 [ 45.154211] ? __pfx_mmap_region+0x10/0x10 [ 45.154782] ? security_mmap_addr+0x7d/0xa0 [ 45.155372] ? get_unmapped_area+0x1f5/0x3f0 [ 45.155985] do_mmap+0x854/0xf00 [ 45.156474] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.157014] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.157608] ksys_mmap_pgoff+0x3af/0x500 [ 45.158194] do_syscall_64+0x3f/0x90 [ 45.158716] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.159439] RIP: 0033:0x7fdeb19e2d82 [ 45.159958] 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 [ 45.162354] RSP: 002b:00007ffc41adf278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.163368] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdeb19e2d82 [ 45.164314] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdeb0e1c000 [ 45.165252] RBP: 00007fdeb0e1c000 R08: 0000000000000009 R09: 0000000000001000 [ 45.166205] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c6c855dec0 [ 45.167138] R13: 00007ffc41adf290 R14: 00007ffc41adf2c0 R15: 00007ffc41adf620 [ 45.168085] [ 45.168419] [ 45.168656] Allocated by task 213: [ 45.169131] kasan_save_stack+0x22/0x50 [ 45.169698] kasan_set_track+0x25/0x30 [ 45.170271] __kasan_slab_alloc+0x59/0x70 [ 45.170855] kmem_cache_alloc+0x16b/0x370 [ 45.171434] vm_area_dup+0x20/0x160 [ 45.171939] __split_vma+0x170/0x950 [ 45.172449] split_vma+0xc6/0x110 [ 45.172937] mprotect_fixup+0x8d2/0xb30 [ 45.173482] do_mprotect_pkey+0x87e/0xd40 [ 45.174072] __x64_sys_mprotect+0x78/0xc0 [ 45.174649] do_syscall_64+0x3f/0x90 [ 45.175176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.175884] [ 45.176124] Freed by task 213: [ 45.176552] kasan_save_stack+0x22/0x50 [ 45.177105] kasan_set_track+0x25/0x30 [ 45.177648] kasan_save_free_info+0x2b/0x50 [ 45.178238] __kasan_slab_free+0x10a/0x190 [ 45.178827] kmem_cache_free+0x10d/0x4d0 [ 45.179389] rcu_core+0x8c8/0x2860 [ 45.179890] __do_softirq+0x1b7/0x7d4 [ 45.180416] [ 45.180655] Last potentially related work creation: [ 45.181288] kasan_save_stack+0x22/0x50 [ 45.181838] __kasan_record_aux_stack+0x8e/0xa0 [ 45.182494] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.183207] remove_vma+0x139/0x170 [ 45.183707] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.184317] do_vmi_munmap+0x1f1/0x2b0 [ 45.184841] __vm_munmap+0x138/0x3a0 [ 45.185341] __x64_sys_munmap+0x59/0x80 [ 45.185877] do_syscall_64+0x3f/0x90 [ 45.186416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.187102] [ 45.187325] Second to last potentially related work creation: [ 45.188072] kasan_save_stack+0x22/0x50 [ 45.188617] __kasan_record_aux_stack+0x8e/0xa0 [ 45.189232] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.189924] remove_vma+0x139/0x170 [ 45.190414] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.191014] do_vmi_munmap+0x1f1/0x2b0 [ 45.191533] move_vma.constprop.0+0x88a/0x1ba0 [ 45.192148] __do_sys_mremap+0xb78/0x1780 [ 45.192697] do_syscall_64+0x3f/0x90 [ 45.193197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.193882] [ 45.194124] The buggy address belongs to the object at ffff88800ec3e740 [ 45.194124] which belongs to the cache vm_area_struct of size 168 [ 45.195713] The buggy address is located 88 bytes inside of [ 45.195713] freed 168-byte region [ffff88800ec3e740, ffff88800ec3e7e8) [ 45.197225] [ 45.197462] The buggy address belongs to the physical page: [ 45.198198] page:00000000f0e533ad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec3e [ 45.199367] memcg:ffff88800e86f501 [ 45.199819] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 45.200579] page_type: 0xffffffff() [ 45.201068] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 45.202080] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e86f501 [ 45.203070] page dumped because: kasan: bad access detected [ 45.203790] [ 45.204024] Memory state around the buggy address: [ 45.204647] ffff88800ec3e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.205577] ffff88800ec3e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 45.206552] >ffff88800ec3e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 45.207472] ^ [ 45.208012] ffff88800ec3e800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 45.208947] ffff88800ec3e880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 45.209861] ================================================================== [ 45.210997] Disabling lock debugging due to kernel taint [ 47.022745] BUG: Bad rss-counter state mm:0000000001763799 type:MM_FILEPAGES val:33 [ 47.023619] BUG: Bad rss-counter state mm:0000000001763799 type:MM_ANONPAGES val:22 [ 47.505250] BUG: Bad rss-counter state mm:000000006b3bbb9c type:MM_FILEPAGES val:33 [ 47.506617] BUG: Bad rss-counter state mm:000000006b3bbb9c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20206' (ECDSA) to the list of known hosts. 2023/06/19 12:53:35 fuzzer started 2023/06/19 12:53:35 dialing manager at localhost:44161 2023/06/19 12:53:35 checking machine... 2023/06/19 12:53:35 checking revisions... [ 48.152989] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:53:35 testing simple program... [ 48.210432] cgroup: Unknown subsys name 'net' [ 48.279996] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:53:28 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f77598d4d77 RCX=ffffffff81007b62 RDX=ffff888019fc3680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff88800f32f968 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b6996 R12=ffff88800f32fab0 R13=0000000000000000 R14=ffff888019fc3680 R15=ffff88800c9e1800 RIP=ffffffff814c07e0 RFL=00000297 [--S-APC] 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 00007f77593ed900 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=00007f77599a4618 CR3=000000000da38000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007fe1c0771ba0 CR3=000000000d85c000 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=922f20479ac23e91364544038dbc31eb XMM02=ec2efd57dc4c00df000000000011d6b8 XMM03=9f3f99b4990cc3e7000000000011d788 XMM04=f24717e3fc623c9000000000000ae988 XMM05=19e9129bd510f23500000000001349c8 XMM06=3d56010caabbf2710000000000133ba0 XMM07=e042d86d42eb936e0000000000124348 XMM08=9f3f99b4990cc3e7000000000011d788 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000