syzkaller login: [ 31.756492] BUG: Bad rss-counter state mm:00000000479bada1 type:MM_FILEPAGES val:33 [ 31.757492] BUG: Bad rss-counter state mm:00000000479bada1 type:MM_ANONPAGES val:22 [ 31.924567] ================================================================== [ 31.925511] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.926519] Read of size 8 at addr ffff888018e84c20 by task sshd/220 [ 31.927324] [ 31.927545] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.928417] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.929433] Call Trace: [ 31.929763] [ 31.930050] dump_stack_lvl+0x91/0xf0 [ 31.930545] print_report+0xcc/0x620 [ 31.931032] ? __virt_addr_valid+0x102/0x340 [ 31.931588] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.932212] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.932843] kasan_report+0xbe/0xf0 [ 31.933336] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.933965] vma_interval_tree_remove+0xc75/0xec0 [ 31.934573] vma_prepare+0xc54/0x11a0 [ 31.935059] __split_vma+0x5af/0x950 [ 31.935535] ? __pfx___split_vma+0x10/0x10 [ 31.936071] ? find_held_lock+0x2c/0x110 [ 31.936600] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.937175] ? lock_is_held_type+0x9f/0x120 [ 31.937722] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.938338] ? mtree_range_walk+0x632/0x900 [ 31.938897] ? mas_walk+0x5c7/0x7c0 [ 31.939376] do_vmi_munmap+0x1f1/0x2b0 [ 31.939881] mmap_region+0x1f9/0x2660 [ 31.940366] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.940911] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.941640] ? __pfx_lock_acquire+0x10/0x10 [ 31.942180] ? __pfx_mmap_region+0x10/0x10 [ 31.942716] ? security_mmap_addr+0x7d/0xa0 [ 31.943255] ? get_unmapped_area+0x1f5/0x3f0 [ 31.943809] do_mmap+0x854/0xf00 [ 31.944256] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.944757] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.945330] ksys_mmap_pgoff+0x3af/0x500 [ 31.945846] do_syscall_64+0x3f/0x90 [ 31.946327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.946982] RIP: 0033:0x7f974a261d82 [ 31.947450] 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 [ 31.949615] RSP: 002b:00007ffcf17416f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.950534] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f974a261d82 [ 31.951393] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f974969b000 [ 31.952257] RBP: 00007f974969b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.953129] R10: 0000000000000812 R11: 0000000000000206 R12: 00005572195a3ec0 [ 31.953988] R13: 00007ffcf1741710 R14: 00007ffcf1741740 R15: 00007ffcf1741aa0 [ 31.954851] [ 31.955150] [ 31.955367] Allocated by task 213: [ 31.955802] kasan_save_stack+0x22/0x50 [ 31.956315] kasan_set_track+0x25/0x30 [ 31.956825] __kasan_slab_alloc+0x59/0x70 [ 31.957364] kmem_cache_alloc+0x16b/0x370 [ 31.957879] vm_area_dup+0x20/0x160 [ 31.958340] __split_vma+0x170/0x950 [ 31.958812] split_vma+0xc6/0x110 [ 31.959257] mprotect_fixup+0x8d2/0xb30 [ 31.959770] do_mprotect_pkey+0x87e/0xd40 [ 31.960303] __x64_sys_mprotect+0x78/0xc0 [ 31.960831] do_syscall_64+0x3f/0x90 [ 31.961318] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.961975] [ 31.962193] Freed by task 213: [ 31.962596] kasan_save_stack+0x22/0x50 [ 31.963105] kasan_set_track+0x25/0x30 [ 31.963604] kasan_save_free_info+0x2b/0x50 [ 31.964143] __kasan_slab_free+0x10a/0x190 [ 31.964683] kmem_cache_free+0x10d/0x4d0 [ 31.965209] rcu_core+0x8c8/0x2860 [ 31.965656] __do_softirq+0x1b7/0x7d4 [ 31.966149] [ 31.966372] Last potentially related work creation: [ 31.966976] kasan_save_stack+0x22/0x50 [ 31.967491] __kasan_record_aux_stack+0x8e/0xa0 [ 31.968070] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.968726] remove_vma+0x139/0x170 [ 31.969197] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.969768] do_vmi_munmap+0x1f1/0x2b0 [ 31.970264] __vm_munmap+0x138/0x3a0 [ 31.970739] __x64_sys_munmap+0x59/0x80 [ 31.971239] do_syscall_64+0x3f/0x90 [ 31.971719] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.972372] [ 31.972588] The buggy address belongs to the object at ffff888018e84bc8 [ 31.972588] which belongs to the cache vm_area_struct of size 168 [ 31.974078] The buggy address is located 88 bytes inside of [ 31.974078] freed 168-byte region [ffff888018e84bc8, ffff888018e84c70) [ 31.975493] [ 31.975709] The buggy address belongs to the physical page: [ 31.976375] page:0000000093c1c640 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18e84 [ 31.977479] memcg:ffff88800fbbc301 [ 31.977917] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.978573] page_type: 0xffffffff() [ 31.979029] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.979956] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fbbc301 [ 31.980872] page dumped because: kasan: bad access detected [ 31.981562] [ 31.981778] Memory state around the buggy address: [ 31.982369] ffff888018e84b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.983230] ffff888018e84b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.984098] >ffff888018e84c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.984961] ^ [ 31.985496] ffff888018e84c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.986376] ffff888018e84d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.987240] ================================================================== [ 31.988234] Disabling lock debugging due to kernel taint [ 34.126752] BUG: Bad rss-counter state mm:00000000e46713ea type:MM_FILEPAGES val:33 [ 34.128035] BUG: Bad rss-counter state mm:00000000e46713ea type:MM_ANONPAGES val:22 [ 34.537000] BUG: Bad rss-counter state mm:00000000fe5f3cf7 type:MM_FILEPAGES val:33 [ 34.537993] BUG: Bad rss-counter state mm:00000000fe5f3cf7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50776' (ECDSA) to the list of known hosts. 2023/06/19 18:43:49 fuzzer started 2023/06/19 18:43:49 dialing manager at localhost:44161 2023/06/19 18:43:49 checking machine... 2023/06/19 18:43:49 checking revisions... [ 35.235623] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:43:49 testing simple program... [ 35.280185] cgroup: Unknown subsys name 'net' [ 35.335333] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:43:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86088c1a RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800cfb78e0 RSP=ffff88800cfb77c8 R8 =ffffffff86088c1e R9 =ffff88800cfb78c8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800cfb78e8 R13=ffff88800cfb78d0 R14=ffff88800cfb7930 R15=ffff88800cfb7888 RIP=ffffffff81131151 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 00007f9898345900 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=00007f98988fa650 CR3=0000000019ae6000 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=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=00007f591e6ac9d0 CR3=0000000016968000 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=2039343a33343a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a33343a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000