syzkaller login: [ 30.153168] BUG: Bad rss-counter state mm:0000000045166bc2 type:MM_FILEPAGES val:33 [ 30.154185] BUG: Bad rss-counter state mm:0000000045166bc2 type:MM_ANONPAGES val:22 [ 30.325343] ================================================================== [ 30.326292] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.327243] Read of size 8 at addr ffff88800d9ca4e0 by task sshd/220 [ 30.328122] [ 30.328339] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.329223] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.330270] Call Trace: [ 30.330597] [ 30.330882] dump_stack_lvl+0x91/0xf0 [ 30.331371] print_report+0xcc/0x620 [ 30.331871] ? __virt_addr_valid+0x102/0x340 [ 30.332425] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.333084] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.333745] kasan_report+0xbe/0xf0 [ 30.334223] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.334845] vma_interval_tree_remove+0xc75/0xec0 [ 30.335447] vma_prepare+0xc54/0x11a0 [ 30.335925] __split_vma+0x5af/0x950 [ 30.336406] ? __pfx___split_vma+0x10/0x10 [ 30.336953] ? find_held_lock+0x2c/0x110 [ 30.337515] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.338089] ? lock_is_held_type+0x9f/0x120 [ 30.338626] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.339242] ? mtree_range_walk+0x632/0x900 [ 30.339794] ? mas_walk+0x5c7/0x7c0 [ 30.340275] do_vmi_munmap+0x1f1/0x2b0 [ 30.340794] mmap_region+0x1f9/0x2660 [ 30.341282] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.341835] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.342549] ? __pfx_lock_acquire+0x10/0x10 [ 30.343083] ? __pfx_mmap_region+0x10/0x10 [ 30.343617] ? security_mmap_addr+0x7d/0xa0 [ 30.344144] ? get_unmapped_area+0x1f5/0x3f0 [ 30.344732] do_mmap+0x854/0xf00 [ 30.345185] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.345715] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.346281] ksys_mmap_pgoff+0x3af/0x500 [ 30.346799] do_syscall_64+0x3f/0x90 [ 30.347284] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.347937] RIP: 0033:0x7f5d5a8b2d82 [ 30.348396] 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 [ 30.350630] RSP: 002b:00007fff577fb858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.351536] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d5a8b2d82 [ 30.352385] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d59cec000 [ 30.353248] RBP: 00007f5d59cec000 R08: 0000000000000009 R09: 0000000000001000 [ 30.354129] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561358b30b20 [ 30.354970] R13: 00007fff577fb870 R14: 00007fff577fb8a0 R15: 00007fff577fbc00 [ 30.355836] [ 30.356128] [ 30.356345] Allocated by task 213: [ 30.356809] kasan_save_stack+0x22/0x50 [ 30.357321] kasan_set_track+0x25/0x30 [ 30.357851] __kasan_slab_alloc+0x59/0x70 [ 30.358384] kmem_cache_alloc+0x16b/0x370 [ 30.358906] vm_area_dup+0x20/0x160 [ 30.359366] __split_vma+0x170/0x950 [ 30.359842] split_vma+0xc6/0x110 [ 30.360285] mprotect_fixup+0x8d2/0xb30 [ 30.360797] do_mprotect_pkey+0x87e/0xd40 [ 30.361318] __x64_sys_mprotect+0x78/0xc0 [ 30.361871] do_syscall_64+0x3f/0x90 [ 30.362355] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.362999] [ 30.363212] Freed by task 13: [ 30.363595] kasan_save_stack+0x22/0x50 [ 30.364103] kasan_set_track+0x25/0x30 [ 30.364598] kasan_save_free_info+0x2b/0x50 [ 30.365145] __kasan_slab_free+0x10a/0x190 [ 30.365711] kmem_cache_free+0x10d/0x4d0 [ 30.366222] rcu_core+0x8c8/0x2860 [ 30.366661] __do_softirq+0x1b7/0x7d4 [ 30.367143] [ 30.367357] Last potentially related work creation: [ 30.367943] kasan_save_stack+0x22/0x50 [ 30.368508] __kasan_record_aux_stack+0x8e/0xa0 [ 30.369115] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.369806] remove_vma+0x139/0x170 [ 30.370262] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.370820] do_vmi_munmap+0x1f1/0x2b0 [ 30.371305] __vm_munmap+0x138/0x3a0 [ 30.371771] __x64_sys_munmap+0x59/0x80 [ 30.372275] do_syscall_64+0x3f/0x90 [ 30.372781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.373448] [ 30.373683] The buggy address belongs to the object at ffff88800d9ca488 [ 30.373683] which belongs to the cache vm_area_struct of size 168 [ 30.375156] The buggy address is located 88 bytes inside of [ 30.375156] freed 168-byte region [ffff88800d9ca488, ffff88800d9ca530) [ 30.376569] [ 30.376810] The buggy address belongs to the physical page: [ 30.377502] page:00000000bb2c7a59 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9ca [ 30.378597] memcg:ffff88800cb3b401 [ 30.379031] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.379682] page_type: 0xffffffff() [ 30.380134] raw: 0100000000000200 ffff8880087a0c80 ffffea00005a0a00 dead000000000004 [ 30.381067] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb3b401 [ 30.382009] page dumped because: kasan: bad access detected [ 30.382673] [ 30.382888] Memory state around the buggy address: [ 30.383469] ffff88800d9ca380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.384415] ffff88800d9ca400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.385316] >ffff88800d9ca480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.386220] ^ [ 30.387015] ffff88800d9ca500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.387898] ffff88800d9ca580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.388804] ================================================================== [ 30.389846] Disabling lock debugging due to kernel taint [ 32.584422] BUG: Bad rss-counter state mm:000000001bd7f995 type:MM_FILEPAGES val:33 [ 32.585610] BUG: Bad rss-counter state mm:000000001bd7f995 type:MM_ANONPAGES val:22 [ 33.150840] BUG: Bad rss-counter state mm:000000001b816ea6 type:MM_FILEPAGES val:31 [ 33.152043] BUG: Bad rss-counter state mm:000000001b816ea6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16382' (ECDSA) to the list of known hosts. 2023/06/20 21:10:17 fuzzer started 2023/06/20 21:10:17 dialing manager at localhost:36067 2023/06/20 21:10:17 checking machine... 2023/06/20 21:10:17 checking revisions... [ 33.816635] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:10:17 testing simple program... [ 33.869373] cgroup: Unknown subsys name 'net' [ 33.915947] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:10:17 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff814c856d RDX=ffff88800fd21b40 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff888019e5f680 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=0000000000000dc0 RIP=ffffffff814c0408 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 00007f471b424900 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=00007f471b9dc0b0 CR3=0000000015a60000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fb404db1630 CR3=000000000cc2a000 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=486ed06b1758fdad594018311cacb7ac XMM02=000000000011bef8ec2efd57dc4c00df XMM03=00000000001223b89f821de83f9cfdfb XMM04=a35eb9b8ab511e7b00000000000ae988 XMM05=19e9129bd510f2350000000000132230 XMM06=e797a23041fe47840000000000131098 XMM07=e042d86d42eb936e0000000000122638 XMM08=9f821de83f9cfdfb000000000011bf58 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000