syzkaller login: [ 39.051417] BUG: Bad rss-counter state mm:00000000f1540812 type:MM_FILEPAGES val:33 [ 39.052442] BUG: Bad rss-counter state mm:00000000f1540812 type:MM_ANONPAGES val:22 [ 39.216364] ================================================================== [ 39.217299] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.218234] Read of size 8 at addr ffff88800e862968 by task sshd/220 [ 39.219019] [ 39.219243] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.220285] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.221261] Call Trace: [ 39.221582] [ 39.221954] dump_stack_lvl+0x91/0xf0 [ 39.222559] print_report+0xcc/0x620 [ 39.223126] ? __virt_addr_valid+0x102/0x340 [ 39.223765] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.224487] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.225207] kasan_report+0xbe/0xf0 [ 39.225770] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.226537] vma_interval_tree_remove+0xc75/0xec0 [ 39.227241] vma_prepare+0xc54/0x11a0 [ 39.227710] __split_vma+0x5af/0x950 [ 39.228172] ? __pfx___split_vma+0x10/0x10 [ 39.228691] ? find_held_lock+0x2c/0x110 [ 39.229201] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.229757] ? lock_is_held_type+0x9f/0x120 [ 39.230289] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.230902] ? mtree_range_walk+0x632/0x900 [ 39.231444] ? mas_walk+0x5c7/0x7c0 [ 39.231916] do_vmi_munmap+0x1f1/0x2b0 [ 39.232402] mmap_region+0x1f9/0x2660 [ 39.232878] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.233383] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.234087] ? __pfx_lock_acquire+0x10/0x10 [ 39.234619] ? __pfx_mmap_region+0x10/0x10 [ 39.235146] ? security_mmap_addr+0x7d/0xa0 [ 39.235671] ? get_unmapped_area+0x1f5/0x3f0 [ 39.236217] do_mmap+0x854/0xf00 [ 39.236650] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.237137] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.237693] ksys_mmap_pgoff+0x3af/0x500 [ 39.238192] do_syscall_64+0x3f/0x90 [ 39.238687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.239333] RIP: 0033:0x7f10dd9fdd82 [ 39.239782] 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 [ 39.241898] RSP: 002b:00007fffb81569d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.242801] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f10dd9fdd82 [ 39.243641] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f10dce37000 [ 39.244478] RBP: 00007f10dce37000 R08: 0000000000000009 R09: 0000000000001000 [ 39.245315] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f51040aec0 [ 39.246157] R13: 00007fffb81569f0 R14: 00007fffb8156a20 R15: 00007fffb8156d80 [ 39.247081] [ 39.247430] [ 39.247703] Allocated by task 212: [ 39.248230] kasan_save_stack+0x22/0x50 [ 39.248859] kasan_set_track+0x25/0x30 [ 39.249468] __kasan_slab_alloc+0x59/0x70 [ 39.250105] kmem_cache_alloc+0x16b/0x370 [ 39.250760] vm_area_dup+0x20/0x160 [ 39.251313] __split_vma+0x170/0x950 [ 39.251896] split_vma+0xc6/0x110 [ 39.252430] mprotect_fixup+0x8d2/0xb30 [ 39.253041] do_mprotect_pkey+0x87e/0xd40 [ 39.253692] __x64_sys_mprotect+0x78/0xc0 [ 39.254334] do_syscall_64+0x3f/0x90 [ 39.254942] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.255738] [ 39.255996] Freed by task 212: [ 39.256475] kasan_save_stack+0x22/0x50 [ 39.257094] kasan_set_track+0x25/0x30 [ 39.257713] kasan_save_free_info+0x2b/0x50 [ 39.258360] __kasan_slab_free+0x10a/0x190 [ 39.259031] kmem_cache_free+0x10d/0x4d0 [ 39.259668] rcu_core+0x8c8/0x2860 [ 39.260209] __do_softirq+0x1b7/0x7d4 [ 39.260801] [ 39.261066] Last potentially related work creation: [ 39.261887] kasan_save_stack+0x22/0x50 [ 39.262531] __kasan_record_aux_stack+0x8e/0xa0 [ 39.263236] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.264026] remove_vma+0x139/0x170 [ 39.264592] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.265284] do_vmi_munmap+0x1f1/0x2b0 [ 39.265799] __vm_munmap+0x138/0x3a0 [ 39.266242] __x64_sys_munmap+0x59/0x80 [ 39.266723] do_syscall_64+0x3f/0x90 [ 39.267175] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.267785] [ 39.267993] Second to last potentially related work creation: [ 39.268637] kasan_save_stack+0x22/0x50 [ 39.269110] __kasan_record_aux_stack+0x8e/0xa0 [ 39.269649] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.270258] remove_vma+0x139/0x170 [ 39.270689] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.271215] do_vmi_munmap+0x1f1/0x2b0 [ 39.271680] mmap_region+0x1f9/0x2660 [ 39.272134] do_mmap+0x854/0xf00 [ 39.272549] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.273012] ksys_mmap_pgoff+0x3af/0x500 [ 39.273488] do_syscall_64+0x3f/0x90 [ 39.273939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.274567] [ 39.274774] The buggy address belongs to the object at ffff88800e862910 [ 39.274774] which belongs to the cache vm_area_struct of size 168 [ 39.276200] The buggy address is located 88 bytes inside of [ 39.276200] freed 168-byte region [ffff88800e862910, ffff88800e8629b8) [ 39.277606] [ 39.277824] The buggy address belongs to the physical page: [ 39.278484] page:00000000ef55addf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe862 [ 39.279567] memcg:ffff88800e530201 [ 39.279987] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.280627] page_type: 0xffffffff() [ 39.281074] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b0780 dead000000000006 [ 39.281987] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e530201 [ 39.282900] page dumped because: kasan: bad access detected [ 39.283554] [ 39.283763] Memory state around the buggy address: [ 39.284329] ffff88800e862800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.285178] ffff88800e862880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.286034] >ffff88800e862900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.286888] ^ [ 39.287663] ffff88800e862980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 39.288503] ffff88800e862a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.289338] ================================================================== [ 39.290248] Disabling lock debugging due to kernel taint [ 41.117344] BUG: Bad rss-counter state mm:0000000095cc1fbc type:MM_FILEPAGES val:33 [ 41.118604] BUG: Bad rss-counter state mm:0000000095cc1fbc type:MM_ANONPAGES val:22 [ 41.561649] BUG: Bad rss-counter state mm:0000000048fb3a1e type:MM_FILEPAGES val:33 [ 41.562668] BUG: Bad rss-counter state mm:0000000048fb3a1e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60697' (ECDSA) to the list of known hosts. 2023/06/21 03:20:01 fuzzer started 2023/06/21 03:20:01 dialing manager at localhost:36067 2023/06/21 03:20:01 checking machine... 2023/06/21 03:20:01 checking revisions... [ 42.275362] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:20:02 testing simple program... [ 42.330244] cgroup: Unknown subsys name 'net' [ 42.394392] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:20:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800ef6f0e8 RCX=0000000000000003 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff88800ef6f0a0 RBP=ffff888019409b40 RSP=ffff88800ef6eff8 R8 =0000000000000000 R9 =0000000000000000 R10=ffff88800ef6f050 R11=00000000000b6a61 R12=0000000000000000 R13=ffff88800ef6f078 R14=ffff888019409b40 R15=ffff88800ef6f050 RIP=ffffffff84513442 RFL=00000206 [-----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 00007f8b52de6900 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=00007f8b52dc5020 CR3=000000000e52a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007f3fdd5bf7b0 CR3=00000000094be000 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=2031303a30323a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a30323a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000