syzkaller login: [ 33.142095] BUG: Bad rss-counter state mm:00000000d0b188ed type:MM_FILEPAGES val:33 [ 33.143813] BUG: Bad rss-counter state mm:00000000d0b188ed type:MM_ANONPAGES val:22 [ 33.299285] ================================================================== [ 33.300211] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.301152] Read of size 8 at addr ffff88800feca798 by task sshd/220 [ 33.302022] [ 33.302242] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.303119] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.304102] Call Trace: [ 33.304431] [ 33.304718] dump_stack_lvl+0x91/0xf0 [ 33.305212] print_report+0xcc/0x620 [ 33.305697] ? __virt_addr_valid+0x102/0x340 [ 33.306239] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.306862] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.307478] kasan_report+0xbe/0xf0 [ 33.307962] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.308579] vma_interval_tree_remove+0xc75/0xec0 [ 33.309180] vma_prepare+0xc54/0x11a0 [ 33.309652] __split_vma+0x5af/0x950 [ 33.310117] ? __pfx___split_vma+0x10/0x10 [ 33.310672] ? find_held_lock+0x2c/0x110 [ 33.311190] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.311759] ? lock_is_held_type+0x9f/0x120 [ 33.312290] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.312896] ? mtree_range_walk+0x632/0x900 [ 33.313441] ? mas_walk+0x5c7/0x7c0 [ 33.313910] do_vmi_munmap+0x1f1/0x2b0 [ 33.314399] mmap_region+0x1f9/0x2660 [ 33.314896] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.315401] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.316110] ? __pfx_lock_acquire+0x10/0x10 [ 33.316636] ? __pfx_mmap_region+0x10/0x10 [ 33.317160] ? security_mmap_addr+0x7d/0xa0 [ 33.317696] ? get_unmapped_area+0x1f5/0x3f0 [ 33.318239] do_mmap+0x854/0xf00 [ 33.318698] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.319193] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.319753] ksys_mmap_pgoff+0x3af/0x500 [ 33.320254] do_syscall_64+0x3f/0x90 [ 33.320738] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.321379] RIP: 0033:0x7f57b1c56d82 [ 33.321834] 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 [ 33.323959] RSP: 002b:00007fffd676db78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.324849] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f57b1c56d82 [ 33.325704] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f57b1090000 [ 33.326545] RBP: 00007f57b1090000 R08: 0000000000000009 R09: 0000000000001000 [ 33.327396] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e5ee025b20 [ 33.328240] R13: 00007fffd676db90 R14: 00007fffd676dbc0 R15: 00007fffd676df20 [ 33.329095] [ 33.329386] [ 33.329601] Allocated by task 213: [ 33.330026] kasan_save_stack+0x22/0x50 [ 33.330530] kasan_set_track+0x25/0x30 [ 33.331036] __kasan_slab_alloc+0x59/0x70 [ 33.331554] kmem_cache_alloc+0x16b/0x370 [ 33.332069] vm_area_dup+0x20/0x160 [ 33.332519] __split_vma+0x170/0x950 [ 33.332984] split_vma+0xc6/0x110 [ 33.333422] mprotect_fixup+0x8d2/0xb30 [ 33.333923] do_mprotect_pkey+0x87e/0xd40 [ 33.334439] __x64_sys_mprotect+0x78/0xc0 [ 33.334972] do_syscall_64+0x3f/0x90 [ 33.335442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.336078] [ 33.336290] Freed by task 213: [ 33.336676] kasan_save_stack+0x22/0x50 [ 33.337177] kasan_set_track+0x25/0x30 [ 33.337663] kasan_save_free_info+0x2b/0x50 [ 33.338192] __kasan_slab_free+0x10a/0x190 [ 33.338730] kmem_cache_free+0x10d/0x4d0 [ 33.339233] rcu_core+0x8c8/0x2860 [ 33.339673] __do_softirq+0x1b7/0x7d4 [ 33.340148] [ 33.340363] Last potentially related work creation: [ 33.340941] kasan_save_stack+0x22/0x50 [ 33.341440] __kasan_record_aux_stack+0x8e/0xa0 [ 33.342005] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.342660] remove_vma+0x139/0x170 [ 33.343105] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.343657] do_vmi_munmap+0x1f1/0x2b0 [ 33.344134] __vm_munmap+0x138/0x3a0 [ 33.344597] __x64_sys_munmap+0x59/0x80 [ 33.345092] do_syscall_64+0x3f/0x90 [ 33.345558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.346191] [ 33.346405] The buggy address belongs to the object at ffff88800feca740 [ 33.346405] which belongs to the cache vm_area_struct of size 168 [ 33.347850] The buggy address is located 88 bytes inside of [ 33.347850] freed 168-byte region [ffff88800feca740, ffff88800feca7e8) [ 33.349239] [ 33.349455] The buggy address belongs to the physical page: [ 33.350102] page:000000005100aa65 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfeca [ 33.351171] memcg:ffff888016424d01 [ 33.351590] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.352224] page_type: 0xffffffff() [ 33.352670] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.353575] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016424d01 [ 33.354464] page dumped because: kasan: bad access detected [ 33.355129] [ 33.355344] Memory state around the buggy address: [ 33.355916] ffff88800feca680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.356758] ffff88800feca700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.357603] >ffff88800feca780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.358440] ^ [ 33.358933] ffff88800feca800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.359781] ffff88800feca880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.360614] ================================================================== [ 33.361607] Disabling lock debugging due to kernel taint [ 35.224980] BUG: Bad rss-counter state mm:00000000bfc28b7d type:MM_FILEPAGES val:33 [ 35.226142] BUG: Bad rss-counter state mm:00000000bfc28b7d type:MM_ANONPAGES val:22 [ 35.682533] BUG: Bad rss-counter state mm:00000000ab67ab94 type:MM_FILEPAGES val:33 [ 35.683640] BUG: Bad rss-counter state mm:00000000ab67ab94 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25017' (ECDSA) to the list of known hosts. 2023/06/20 00:34:24 fuzzer started 2023/06/20 00:34:25 dialing manager at localhost:44161 2023/06/20 00:34:25 checking machine... 2023/06/20 00:34:25 checking revisions... [ 36.313390] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:34:25 testing simple program... [ 36.366574] cgroup: Unknown subsys name 'net' [ 36.418141] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:34:22 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000001 RCX=ffffffff8180c521 RDX=00000000000080c5 RSI=00000000000080c5 RDI=ffffffff86507ed4 RBP=ffff88800fe97af8 RSP=ffff88800fe97a30 R8 =0000000000000000 R9 =ffff88800fe97ae0 R10=0000000000038001 R11=0000000000020d8a R12=ffff88800fe97b00 R13=ffff88800fe97ae8 R14=ffff88800fe97ae1 R15=ffff88800fe97aa0 RIP=ffffffff811307c2 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 00007fca241fe900 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=00007fca247b3650 CR3=0000000018d6a000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=00007ffcb11c8e68 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=00007f228d8225100000560b2f31b790 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