syzkaller login: [ 53.029454] BUG: Bad rss-counter state mm:0000000075985f55 type:MM_FILEPAGES val:33 [ 53.030529] BUG: Bad rss-counter state mm:0000000075985f55 type:MM_ANONPAGES val:22 [ 53.202350] ================================================================== [ 53.203459] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 53.204675] Read of size 8 at addr ffff8880094d75c8 by task sshd/220 [ 53.205670] [ 53.205935] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 53.207025] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 53.208291] Call Trace: [ 53.208702] [ 53.209056] dump_stack_lvl+0x91/0xf0 [ 53.209593] print_report+0xcc/0x620 [ 53.210122] ? __virt_addr_valid+0x102/0x340 [ 53.210721] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.211391] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.212059] kasan_report+0xbe/0xf0 [ 53.212576] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.213228] vma_interval_tree_remove+0xc75/0xec0 [ 53.213865] vma_prepare+0xc54/0x11a0 [ 53.214373] __split_vma+0x5af/0x950 [ 53.214879] ? __pfx___split_vma+0x10/0x10 [ 53.215439] ? find_held_lock+0x2c/0x110 [ 53.215989] do_vmi_align_munmap+0x2ba/0x11f0 [ 53.216616] ? lock_is_held_type+0x9f/0x120 [ 53.217182] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 53.217822] ? mtree_range_walk+0x632/0x900 [ 53.218411] ? mas_walk+0x5c7/0x7c0 [ 53.218914] do_vmi_munmap+0x1f1/0x2b0 [ 53.219441] mmap_region+0x1f9/0x2660 [ 53.219954] ? vm_mmap_pgoff+0x15c/0x3a0 [ 53.220510] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 53.221266] ? __pfx_lock_acquire+0x10/0x10 [ 53.221829] ? __pfx_mmap_region+0x10/0x10 [ 53.222406] ? security_mmap_addr+0x7d/0xa0 [ 53.222991] ? get_unmapped_area+0x1f5/0x3f0 [ 53.223596] do_mmap+0x854/0xf00 [ 53.224079] vm_mmap_pgoff+0x1a6/0x3a0 [ 53.224637] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 53.225257] ksys_mmap_pgoff+0x3af/0x500 [ 53.225818] do_syscall_64+0x3f/0x90 [ 53.226344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.227055] RIP: 0033:0x7f895193cd82 [ 53.227561] 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 [ 53.229929] RSP: 002b:00007ffc7497a4e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 53.230931] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f895193cd82 [ 53.231871] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8950d76000 [ 53.232823] RBP: 00007f8950d76000 R08: 0000000000000009 R09: 0000000000001000 [ 53.233762] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b26b9ccec0 [ 53.234700] R13: 00007ffc7497a500 R14: 00007ffc7497a530 R15: 00007ffc7497a890 [ 53.235650] [ 53.235971] [ 53.236228] Allocated by task 213: [ 53.236708] kasan_save_stack+0x22/0x50 [ 53.237261] kasan_set_track+0x25/0x30 [ 53.237810] __kasan_slab_alloc+0x59/0x70 [ 53.238388] kmem_cache_alloc+0x16b/0x370 [ 53.238958] vm_area_dup+0x20/0x160 [ 53.239464] __split_vma+0x170/0x950 [ 53.239981] split_vma+0xc6/0x110 [ 53.240477] mprotect_fixup+0x8d2/0xb30 [ 53.241039] do_mprotect_pkey+0x87e/0xd40 [ 53.241612] __x64_sys_mprotect+0x78/0xc0 [ 53.242186] do_syscall_64+0x3f/0x90 [ 53.242705] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.243413] [ 53.243648] Freed by task 213: [ 53.244086] kasan_save_stack+0x22/0x50 [ 53.244649] kasan_set_track+0x25/0x30 [ 53.245190] kasan_save_free_info+0x2b/0x50 [ 53.245837] __kasan_slab_free+0x10a/0x190 [ 53.246433] kmem_cache_free+0x10d/0x4d0 [ 53.246997] rcu_core+0x8c8/0x2860 [ 53.247481] __do_softirq+0x1b7/0x7d4 [ 53.248007] [ 53.248253] Last potentially related work creation: [ 53.248898] kasan_save_stack+0x22/0x50 [ 53.249458] __kasan_record_aux_stack+0x8e/0xa0 [ 53.250087] __call_rcu_common.constprop.0+0x6a/0xb90 [ 53.250797] remove_vma+0x139/0x170 [ 53.251300] do_vmi_align_munmap+0xd4a/0x11f0 [ 53.251919] do_vmi_munmap+0x1f1/0x2b0 [ 53.252463] __vm_munmap+0x138/0x3a0 [ 53.252976] __x64_sys_munmap+0x59/0x80 [ 53.253518] do_syscall_64+0x3f/0x90 [ 53.254039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.254744] [ 53.254977] Second to last potentially related work creation: [ 53.255736] kasan_save_stack+0x22/0x50 [ 53.256311] __kasan_record_aux_stack+0x8e/0xa0 [ 53.256940] __call_rcu_common.constprop.0+0x6a/0xb90 [ 53.257659] remove_vma+0x139/0x170 [ 53.258149] do_vmi_align_munmap+0xd4a/0x11f0 [ 53.258754] do_vmi_munmap+0x1f1/0x2b0 [ 53.259287] mmap_region+0x1f9/0x2660 [ 53.259818] do_mmap+0x854/0xf00 [ 53.260303] vm_mmap_pgoff+0x1a6/0x3a0 [ 53.260843] ksys_mmap_pgoff+0x3af/0x500 [ 53.261396] do_syscall_64+0x3f/0x90 [ 53.261926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.262646] [ 53.262884] The buggy address belongs to the object at ffff8880094d7570 [ 53.262884] which belongs to the cache vm_area_struct of size 168 [ 53.264514] The buggy address is located 88 bytes inside of [ 53.264514] freed 168-byte region [ffff8880094d7570, ffff8880094d7618) [ 53.266062] [ 53.266300] The buggy address belongs to the physical page: [ 53.267029] page:000000002e2ca584 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94d7 [ 53.268234] memcg:ffff88800cf50001 [ 53.268714] flags: 0x100000000000200(slab|node=0|zone=1) [ 53.269424] page_type: 0xffffffff() [ 53.269918] raw: 0100000000000200 ffff88800879fc80 ffffea0000404340 dead000000000008 [ 53.270936] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cf50001 [ 53.271936] page dumped because: kasan: bad access detected [ 53.272673] [ 53.272910] Memory state around the buggy address: [ 53.273548] ffff8880094d7480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 53.274498] ffff8880094d7500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 53.275450] >ffff8880094d7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 53.276414] ^ [ 53.277147] ffff8880094d7600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 53.278087] ffff8880094d7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 53.279036] ================================================================== [ 53.280092] Disabling lock debugging due to kernel taint [ 55.534350] BUG: Bad rss-counter state mm:00000000ff391134 type:MM_FILEPAGES val:33 [ 55.535574] BUG: Bad rss-counter state mm:00000000ff391134 type:MM_ANONPAGES val:22 [ 56.059227] BUG: Bad rss-counter state mm:00000000e7af270e type:MM_FILEPAGES val:33 [ 56.060362] BUG: Bad rss-counter state mm:00000000e7af270e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27057' (ECDSA) to the list of known hosts. 2023/06/20 05:57:50 fuzzer started 2023/06/20 05:57:50 dialing manager at localhost:44161 2023/06/20 05:57:50 checking machine... 2023/06/20 05:57:50 checking revisions... [ 56.803400] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:57:51 testing simple program... [ 56.849749] cgroup: Unknown subsys name 'net' [ 56.898049] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:57:36 Registers: info registers vcpu 0 RAX=1ffff11001ae7cf7 RBX=ffff88800d73e788 RCX=1ffff11001bbcfb6 RDX=dffffc0000000000 RSI=ffff88800debf730 RDI=ffff88800d73e7b8 RBP=ffff88800dde7d80 RSP=ffff8880146cf9c8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800debf720 R13=0000000000000000 R14=ffff88800e549048 R15=ffff88800e549000 RIP=ffffffff818474fe RFL=00000046 [---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 00007f4dd5738900 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=00007f4dd4b55c70 CR3=000000000c8f2000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=9840cc4a6f96273c00000000000ae988 XMM05=2b7c69264bdda05f00000000001367f0 XMM06=19e9129bd510f2350000000000134eb0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=ffffffff856d8220 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d8224 RBP=ffffffff856d8220 RSP=ffff88806cf09db0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000287 R13=ffff888016ab0e88 R14=ffffffff818d9dc6 R15=ffff88800fd51800 RIP=ffffffff812e0410 RFL=00000046 [---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 00007f564c0fe900 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=00007fff2e819000 CR3=000000000e61e000 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=6720646572637465733a4d41503d706f 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