syzkaller login: [ 42.155392] BUG: Bad rss-counter state mm:00000000fb0b6ec8 type:MM_FILEPAGES val:33 [ 42.156590] BUG: Bad rss-counter state mm:00000000fb0b6ec8 type:MM_ANONPAGES val:22 [ 42.328123] ================================================================== [ 42.329206] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.330471] Read of size 8 at addr ffff88800e983df0 by task sshd/219 [ 42.331422] [ 42.331686] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.332722] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.333890] Call Trace: [ 42.334274] [ 42.334641] dump_stack_lvl+0x91/0xf0 [ 42.335227] print_report+0xcc/0x620 [ 42.335800] ? __virt_addr_valid+0x102/0x340 [ 42.336398] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.337069] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.337744] kasan_report+0xbe/0xf0 [ 42.338264] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.338967] vma_interval_tree_remove+0xc75/0xec0 [ 42.339628] vma_prepare+0xc54/0x11a0 [ 42.340150] __split_vma+0x5af/0x950 [ 42.340663] ? __pfx___split_vma+0x10/0x10 [ 42.341240] ? find_held_lock+0x2c/0x110 [ 42.341805] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.342418] ? lock_is_held_type+0x9f/0x120 [ 42.343026] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.343696] ? mtree_range_walk+0x632/0x900 [ 42.344292] ? mas_walk+0x5c7/0x7c0 [ 42.344807] do_vmi_munmap+0x1f1/0x2b0 [ 42.345376] mmap_region+0x1f9/0x2660 [ 42.345901] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.346461] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.347243] ? __pfx_lock_acquire+0x10/0x10 [ 42.347811] ? __pfx_mmap_region+0x10/0x10 [ 42.348373] ? security_mmap_addr+0x7d/0xa0 [ 42.348935] ? get_unmapped_area+0x1f5/0x3f0 [ 42.349517] do_mmap+0x854/0xf00 [ 42.349989] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.350518] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.351123] ksys_mmap_pgoff+0x3af/0x500 [ 42.351662] do_syscall_64+0x3f/0x90 [ 42.352163] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.352859] RIP: 0033:0x7f956b968d82 [ 42.353361] 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 [ 42.355735] RSP: 002b:00007ffd0a27c558 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.356730] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f956b968d82 [ 42.357671] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f956ada2000 [ 42.358618] RBP: 00007f956ada2000 R08: 0000000000000009 R09: 0000000000001000 [ 42.359563] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f41366bec0 [ 42.360502] R13: 00007ffd0a27c570 R14: 00007ffd0a27c5a0 R15: 00007ffd0a27c900 [ 42.361443] [ 42.361768] [ 42.362001] Allocated by task 212: [ 42.362466] kasan_save_stack+0x22/0x50 [ 42.363045] kasan_set_track+0x25/0x30 [ 42.363580] __kasan_slab_alloc+0x59/0x70 [ 42.364152] kmem_cache_alloc+0x16b/0x370 [ 42.364719] vm_area_dup+0x20/0x160 [ 42.365222] __split_vma+0x170/0x950 [ 42.365738] split_vma+0xc6/0x110 [ 42.366213] mprotect_fixup+0x8d2/0xb30 [ 42.366784] do_mprotect_pkey+0x87e/0xd40 [ 42.367350] __x64_sys_mprotect+0x78/0xc0 [ 42.367925] do_syscall_64+0x3f/0x90 [ 42.368437] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.369138] [ 42.369372] Freed by task 19: [ 42.369793] kasan_save_stack+0x22/0x50 [ 42.370335] kasan_set_track+0x25/0x30 [ 42.370890] kasan_save_free_info+0x2b/0x50 [ 42.371480] __kasan_slab_free+0x10a/0x190 [ 42.372145] kmem_cache_free+0x10d/0x4d0 [ 42.372706] rcu_core+0x8c8/0x2860 [ 42.373195] __do_softirq+0x1b7/0x7d4 [ 42.373718] [ 42.373952] Last potentially related work creation: [ 42.374616] kasan_save_stack+0x22/0x50 [ 42.375182] __kasan_record_aux_stack+0x8e/0xa0 [ 42.375815] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.376522] remove_vma+0x139/0x170 [ 42.377017] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.377630] do_vmi_munmap+0x1f1/0x2b0 [ 42.378160] __vm_munmap+0x138/0x3a0 [ 42.378687] __x64_sys_munmap+0x59/0x80 [ 42.379237] do_syscall_64+0x3f/0x90 [ 42.379759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.380457] [ 42.380695] Second to last potentially related work creation: [ 42.381454] kasan_save_stack+0x22/0x50 [ 42.382010] __kasan_record_aux_stack+0x8e/0xa0 [ 42.382672] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.383379] remove_vma+0x139/0x170 [ 42.383873] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.384488] do_vmi_munmap+0x1f1/0x2b0 [ 42.385025] mmap_region+0x1f9/0x2660 [ 42.385551] do_mmap+0x854/0xf00 [ 42.386023] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.386564] ksys_mmap_pgoff+0x3af/0x500 [ 42.387133] do_syscall_64+0x3f/0x90 [ 42.387654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.388363] [ 42.388603] The buggy address belongs to the object at ffff88800e983d98 [ 42.388603] which belongs to the cache vm_area_struct of size 168 [ 42.390240] The buggy address is located 88 bytes inside of [ 42.390240] freed 168-byte region [ffff88800e983d98, ffff88800e983e40) [ 42.391803] [ 42.392038] The buggy address belongs to the physical page: [ 42.392766] page:000000007a83a46d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe983 [ 42.393960] memcg:ffff88800e4baa01 [ 42.394428] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 42.395228] page_type: 0xffffffff() [ 42.395723] raw: 0100000000000200 ffff88800879fc80 ffffea00003a6ec0 dead00000000000b [ 42.396735] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4baa01 [ 42.397738] page dumped because: kasan: bad access detected [ 42.398470] [ 42.398714] Memory state around the buggy address: [ 42.399356] ffff88800e983c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 42.400292] ffff88800e983d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 42.401235] >ffff88800e983d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 42.402172] ^ [ 42.403082] ffff88800e983e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 42.404021] ffff88800e983e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.404958] ================================================================== [ 42.406037] Disabling lock debugging due to kernel taint [ 44.311837] BUG: Bad rss-counter state mm:00000000d5f5f73d type:MM_FILEPAGES val:33 [ 44.312613] BUG: Bad rss-counter state mm:00000000d5f5f73d type:MM_ANONPAGES val:22 [ 44.736591] BUG: Bad rss-counter state mm:0000000088f5f448 type:MM_FILEPAGES val:33 [ 44.737661] BUG: Bad rss-counter state mm:0000000088f5f448 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39580' (ECDSA) to the list of known hosts. 2023/06/19 19:59:13 fuzzer started 2023/06/19 19:59:13 dialing manager at localhost:44161 2023/06/19 19:59:13 checking machine... 2023/06/19 19:59:13 checking revisions... [ 45.453215] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:59:14 testing simple program... [ 45.499684] cgroup: Unknown subsys name 'net' [ 45.540079] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:59:10 Registers: info registers vcpu 0 RAX=0000561840497a30 RBX=0000561840497a34 RCX=000000000000000a RDX=0000000000000004 RSI=0000000000000004 RDI=0000561840497a34 RBP=00007ffdfa7b8f58 RSP=00007ffdfa7b8e98 R8 =000056183ff33a10 R9 =00007ffdfa7ce080 R10=0000000000000000 R11=00007ffdfa7b8f40 R12=0000561840497a20 R13=00007ffdfa7b8f50 R14=00007ffdfa7b8f48 R15=0000000000000052 RIP=00007fdc05469cb3 RFL=000002c3 [--SZ--C] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fdc04b44900 00000000 00000000 GS =0000 0000000000000000 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=00007f3122d3c650 CR3=000000000f222000 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=0000000070203a5d3832325b64687373 XMM01=000000000000273d67736d000d0a0920 XMM02=ffffffff0f0e0d0c0b0a090807060504 XMM03=ece2942615c5d1b3000000000011f2a8 XMM04=7f12b69891cbe40600000000000ae988 XMM05=4dde58d80740d04d0000000000137598 XMM06=ed1e50598df223b90000000000135fc8 XMM07=fb795ef6d65770560000000000125450 XMM08=39353a3931203931206e754a3e36383c XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007fff6b027338 CR3=0000000005482000 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=00007f2281be2510000055c43d3da790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000