syzkaller login: [ 38.834967] BUG: Bad rss-counter state mm:0000000017f4e7de type:MM_FILEPAGES val:33 [ 38.836236] BUG: Bad rss-counter state mm:0000000017f4e7de type:MM_ANONPAGES val:22 [ 38.874362] ================================================================== [ 38.875328] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.876285] Read of size 8 at addr ffff888016e82140 by task sshd/219 [ 38.877042] [ 38.877260] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.878137] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.879122] Call Trace: [ 38.879441] [ 38.879731] dump_stack_lvl+0x91/0xf0 [ 38.880235] print_report+0xcc/0x620 [ 38.880722] ? __virt_addr_valid+0x102/0x340 [ 38.881270] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.881900] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.882515] kasan_report+0xbe/0xf0 [ 38.882993] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.883624] vma_interval_tree_remove+0xc75/0xec0 [ 38.884300] vma_prepare+0xc54/0x11a0 [ 38.884805] __split_vma+0x5af/0x950 [ 38.885307] ? __pfx___split_vma+0x10/0x10 [ 38.885908] ? find_held_lock+0x2c/0x110 [ 38.886465] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.887080] ? lock_is_held_type+0x9f/0x120 [ 38.887667] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.888307] ? mtree_range_walk+0x632/0x900 [ 38.888898] ? mas_walk+0x5c7/0x7c0 [ 38.889418] do_vmi_munmap+0x1f1/0x2b0 [ 38.889941] mmap_region+0x1f9/0x2660 [ 38.890467] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.891016] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.891779] ? __pfx_lock_acquire+0x10/0x10 [ 38.892341] ? __pfx_mmap_region+0x10/0x10 [ 38.892925] ? security_mmap_addr+0x7d/0xa0 [ 38.893500] ? get_unmapped_area+0x1f5/0x3f0 [ 38.894094] do_mmap+0x854/0xf00 [ 38.894558] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.895071] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.895656] ksys_mmap_pgoff+0x3af/0x500 [ 38.896195] do_syscall_64+0x3f/0x90 [ 38.896697] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.897379] RIP: 0033:0x7f9695ab1d82 [ 38.897868] 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 [ 38.900096] RSP: 002b:00007ffca16a19b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.901042] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9695ab1d82 [ 38.901942] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9694eeb000 [ 38.902832] RBP: 00007f9694eeb000 R08: 0000000000000009 R09: 0000000000001000 [ 38.903709] R10: 0000000000000812 R11: 0000000000000206 R12: 000055702711cf70 [ 38.904600] R13: 00007ffca16a19d0 R14: 00007ffca16a1a00 R15: 00007ffca16a1d60 [ 38.905503] [ 38.905830] [ 38.906052] Allocated by task 212: [ 38.906499] kasan_save_stack+0x22/0x50 [ 38.907028] kasan_set_track+0x25/0x30 [ 38.907545] __kasan_slab_alloc+0x59/0x70 [ 38.908097] kmem_cache_alloc+0x16b/0x370 [ 38.908635] vm_area_dup+0x20/0x160 [ 38.909111] __split_vma+0x170/0x950 [ 38.909615] split_vma+0xc6/0x110 [ 38.910068] mprotect_fixup+0x8d2/0xb30 [ 38.910585] do_mprotect_pkey+0x87e/0xd40 [ 38.911132] __x64_sys_mprotect+0x78/0xc0 [ 38.911672] do_syscall_64+0x3f/0x90 [ 38.912171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.912847] [ 38.913069] Freed by task 212: [ 38.913478] kasan_save_stack+0x22/0x50 [ 38.914024] kasan_set_track+0x25/0x30 [ 38.914536] kasan_save_free_info+0x2b/0x50 [ 38.915087] __kasan_slab_free+0x10a/0x190 [ 38.915643] kmem_cache_free+0x10d/0x4d0 [ 38.916171] rcu_core+0x8c8/0x2860 [ 38.916632] __do_softirq+0x1b7/0x7d4 [ 38.917129] [ 38.917349] Last potentially related work creation: [ 38.917979] kasan_save_stack+0x22/0x50 [ 38.918504] __kasan_record_aux_stack+0x8e/0xa0 [ 38.919104] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.919769] remove_vma+0x139/0x170 [ 38.920237] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.920811] do_vmi_munmap+0x1f1/0x2b0 [ 38.921318] __vm_munmap+0x138/0x3a0 [ 38.921816] __x64_sys_munmap+0x59/0x80 [ 38.922338] do_syscall_64+0x3f/0x90 [ 38.922829] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.923495] [ 38.923718] The buggy address belongs to the object at ffff888016e820e8 [ 38.923718] which belongs to the cache vm_area_struct of size 168 [ 38.925245] The buggy address is located 88 bytes inside of [ 38.925245] freed 168-byte region [ffff888016e820e8, ffff888016e82190) [ 38.926735] [ 38.926960] The buggy address belongs to the physical page: [ 38.927647] page:000000007b50cec0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16e82 [ 38.928787] memcg:ffff88800d465701 [ 38.929237] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.929924] page_type: 0xffffffff() [ 38.930391] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.931353] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d465701 [ 38.932309] page dumped because: kasan: bad access detected [ 38.933005] [ 38.933231] Memory state around the buggy address: [ 38.933846] ffff888016e82000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.934740] ffff888016e82080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 38.935650] >ffff888016e82100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.936542] ^ [ 38.937223] ffff888016e82180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.938134] ffff888016e82200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.939025] ================================================================== [ 38.940127] Disabling lock debugging due to kernel taint [ 40.760665] BUG: Bad rss-counter state mm:000000008afa4a71 type:MM_FILEPAGES val:33 [ 40.761665] BUG: Bad rss-counter state mm:000000008afa4a71 type:MM_ANONPAGES val:22 [ 41.273998] BUG: Bad rss-counter state mm:00000000a1b26122 type:MM_FILEPAGES val:33 [ 41.275680] BUG: Bad rss-counter state mm:00000000a1b26122 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44367' (ECDSA) to the list of known hosts. 2023/06/21 03:54:39 fuzzer started 2023/06/21 03:54:39 dialing manager at localhost:36067 2023/06/21 03:54:39 checking machine... 2023/06/21 03:54:39 checking revisions... [ 41.956534] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:54:39 testing simple program... [ 42.003114] cgroup: Unknown subsys name 'net' [ 42.049126] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:54:39 Registers: info registers vcpu 0 RAX=ffff888016350001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801634fc01 RSI=ffff88801634fc80 RDI=ffff88801634f8d8 RBP=ffff88801634f920 RSP=ffff88801634f840 R8 =ffffffff860d258a R9 =ffff88801634f908 R10=0000000000038001 R11=000000000000fc0c R12=ffff88801634f928 R13=ffff888016348000 R14=ffff88801634fc88 R15=ffff88801634f8c8 RIP=ffffffff811304d1 RFL=00000286 [--S--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 00007f507113e900 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=00007ffe3bf4bdc8 CR3=000000000dda4000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000058 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000040 RDI=ffff8880146bf420 RBP=ffff88800844f780 RSP=ffff8880146bf418 R8 =ffff888019eef980 R9 =0000000000000000 R10=ffffed10033ddf30 R11=63206e6f69737365 R12=0000000000092820 R13=0000000000092820 R14=0000000000000000 R15=0000000000092820 RIP=ffffffff813ad694 RFL=00000282 [--S----] 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 00007f5a1e10c900 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=00007f5a1d505920 CR3=000000000c528000 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=7761ad5c476c6780674414e43b2c4ff1 XMM02=ec2efd57dc4c00df000000000011a8a8 XMM03=c405df52851e5797000000000011a978 XMM04=9a06e9ce4e55c61000000000000ae988 XMM05=8c23abf79f252ba50000000000132298 XMM06=dfcdbad4f1609c370000000000130dc0 XMM07=fb795ef6d657705600000000001212b8 XMM08=2c67c8bc2e329bc3000000000011a918 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000