syzkaller login: [ 32.116602] BUG: Bad rss-counter state mm:0000000066c0f7a7 type:MM_FILEPAGES val:33 [ 32.117603] BUG: Bad rss-counter state mm:0000000066c0f7a7 type:MM_ANONPAGES val:22 [ 32.284056] ================================================================== [ 32.284988] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.285917] Read of size 8 at addr ffff88800e24dd08 by task sshd/219 [ 32.286812] [ 32.287030] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.287880] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.288858] Call Trace: [ 32.289178] [ 32.289466] dump_stack_lvl+0x91/0xf0 [ 32.289953] print_report+0xcc/0x620 [ 32.290433] ? __virt_addr_valid+0x102/0x340 [ 32.291002] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.291612] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.292218] kasan_report+0xbe/0xf0 [ 32.292684] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.293297] vma_interval_tree_remove+0xc75/0xec0 [ 32.293897] vma_prepare+0xc54/0x11a0 [ 32.294367] __split_vma+0x5af/0x950 [ 32.294846] ? __pfx___split_vma+0x10/0x10 [ 32.295384] ? find_held_lock+0x2c/0x110 [ 32.295900] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.296458] ? lock_is_held_type+0x9f/0x120 [ 32.296992] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.297601] ? mtree_range_walk+0x632/0x900 [ 32.298147] ? mas_walk+0x5c7/0x7c0 [ 32.298625] do_vmi_munmap+0x1f1/0x2b0 [ 32.299116] mmap_region+0x1f9/0x2660 [ 32.299593] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.300097] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.300800] ? __pfx_lock_acquire+0x10/0x10 [ 32.301329] ? __pfx_mmap_region+0x10/0x10 [ 32.301851] ? security_mmap_addr+0x7d/0xa0 [ 32.302374] ? get_unmapped_area+0x1f5/0x3f0 [ 32.302945] do_mmap+0x854/0xf00 [ 32.303379] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.303865] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.304421] ksys_mmap_pgoff+0x3af/0x500 [ 32.304920] do_syscall_64+0x3f/0x90 [ 32.305394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.306033] RIP: 0033:0x7fbac95f6d82 [ 32.306486] 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 [ 32.308602] RSP: 002b:00007ffcd57715a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.309517] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbac95f6d82 [ 32.310363] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbac8a30000 [ 32.311217] RBP: 00007fbac8a30000 R08: 0000000000000009 R09: 0000000000001000 [ 32.312066] R10: 0000000000000812 R11: 0000000000000206 R12: 00005563f9430f70 [ 32.312919] R13: 00007ffcd57715c0 R14: 00007ffcd57715f0 R15: 00007ffcd5771950 [ 32.313780] [ 32.314073] [ 32.314290] Allocated by task 212: [ 32.314728] kasan_save_stack+0x22/0x50 [ 32.315230] kasan_set_track+0x25/0x30 [ 32.315723] __kasan_slab_alloc+0x59/0x70 [ 32.316251] kmem_cache_alloc+0x16b/0x370 [ 32.316775] vm_area_dup+0x20/0x160 [ 32.317228] __split_vma+0x170/0x950 [ 32.317697] split_vma+0xc6/0x110 [ 32.318137] mprotect_fixup+0x8d2/0xb30 [ 32.318639] do_mprotect_pkey+0x87e/0xd40 [ 32.319154] __x64_sys_mprotect+0x78/0xc0 [ 32.319669] do_syscall_64+0x3f/0x90 [ 32.320138] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.320774] [ 32.320987] Freed by task 212: [ 32.321374] kasan_save_stack+0x22/0x50 [ 32.321871] kasan_set_track+0x25/0x30 [ 32.322359] kasan_save_free_info+0x2b/0x50 [ 32.322903] __kasan_slab_free+0x10a/0x190 [ 32.323433] kmem_cache_free+0x10d/0x4d0 [ 32.323932] rcu_core+0x8c8/0x2860 [ 32.324384] __do_softirq+0x1b7/0x7d4 [ 32.324861] [ 32.325078] Last potentially related work creation: [ 32.325672] kasan_save_stack+0x22/0x50 [ 32.326185] __kasan_record_aux_stack+0x8e/0xa0 [ 32.326780] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.327427] remove_vma+0x139/0x170 [ 32.327880] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.328433] do_vmi_munmap+0x1f1/0x2b0 [ 32.328917] __vm_munmap+0x138/0x3a0 [ 32.329388] __x64_sys_munmap+0x59/0x80 [ 32.329882] do_syscall_64+0x3f/0x90 [ 32.330353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.331013] [ 32.331226] Second to last potentially related work creation: [ 32.331910] kasan_save_stack+0x22/0x50 [ 32.332415] __kasan_record_aux_stack+0x8e/0xa0 [ 32.332996] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.333640] remove_vma+0x139/0x170 [ 32.334092] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.334657] do_vmi_munmap+0x1f1/0x2b0 [ 32.335140] mmap_region+0x1f9/0x2660 [ 32.335615] do_mmap+0x854/0xf00 [ 32.336045] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.336539] ksys_mmap_pgoff+0x3af/0x500 [ 32.337041] do_syscall_64+0x3f/0x90 [ 32.337525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.338161] [ 32.338376] The buggy address belongs to the object at ffff88800e24dcb0 [ 32.338376] which belongs to the cache vm_area_struct of size 168 [ 32.339849] The buggy address is located 88 bytes inside of [ 32.339849] freed 168-byte region [ffff88800e24dcb0, ffff88800e24dd58) [ 32.341235] [ 32.341448] The buggy address belongs to the physical page: [ 32.342095] page:00000000a8b8548c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe24d [ 32.343179] memcg:ffff888015eb4901 [ 32.343604] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.344241] page_type: 0xffffffff() [ 32.344692] raw: 0100000000000200 ffff88800879fc80 ffffea00001a4e00 0000000000000008 [ 32.345602] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015eb4901 [ 32.346504] page dumped because: kasan: bad access detected [ 32.347161] [ 32.347375] Memory state around the buggy address: [ 32.347947] ffff88800e24dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.348786] ffff88800e24dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.349661] >ffff88800e24dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.350513] ^ [ 32.350964] ffff88800e24dd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.351821] ffff88800e24de00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 32.352664] ================================================================== [ 32.353689] Disabling lock debugging due to kernel taint [ 34.683458] BUG: Bad rss-counter state mm:00000000cb71eb7d type:MM_FILEPAGES val:33 [ 34.684618] BUG: Bad rss-counter state mm:00000000cb71eb7d type:MM_ANONPAGES val:22 [ 35.071097] BUG: Bad rss-counter state mm:00000000700bcb6e type:MM_FILEPAGES val:33 [ 35.072099] BUG: Bad rss-counter state mm:00000000700bcb6e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14779' (ECDSA) to the list of known hosts. 2023/06/19 15:55:32 fuzzer started 2023/06/19 15:55:33 dialing manager at localhost:44161 2023/06/19 15:55:33 checking machine... 2023/06/19 15:55:33 checking revisions... [ 35.805010] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:55:33 testing simple program... [ 35.849273] cgroup: Unknown subsys name 'net' [ 35.887989] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:55:31 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000001255 RCX=ffffffff8171ac05 RDX=ffff888016593680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800d6b6e80 RSP=ffff88800f0bfe70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000100173 R13=00007ffd42ea542c R14=ffff88800d6b6e90 R15=0000000000000000 RIP=ffffffff814c01e1 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f262813c900 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=00007ffd42ea542c CR3=000000000eaec000 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=8fa8233918445434e508410ed8b4e934 XMM03=580e3243b59ada9c95d5fa38f171e384 XMM04=8c5d4fb6bec1d1cbeb0907de82fa16da XMM05=000000000000000000000000000000ff XMM06=580e3243b59ad19c9509073882711684 XMM07=672065736f6c635f6e6f69737365733a 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=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=00007f8d7f36c038 CR3=0000000019ccc000 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=35353a3531203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343035 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000