syzkaller login: [ 31.132886] BUG: Bad rss-counter state mm:00000000bf904ccc type:MM_FILEPAGES val:33 [ 31.133559] BUG: Bad rss-counter state mm:00000000bf904ccc type:MM_ANONPAGES val:22 [ 31.286741] ================================================================== [ 31.287478] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.288208] Read of size 8 at addr ffff88800e56b880 by task sshd/219 [ 31.288803] [ 31.288978] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.289651] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.290411] Call Trace: [ 31.290706] [ 31.290928] dump_stack_lvl+0x91/0xf0 [ 31.291313] print_report+0xcc/0x620 [ 31.291688] ? __virt_addr_valid+0x102/0x340 [ 31.292114] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.292587] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.293065] kasan_report+0xbe/0xf0 [ 31.293433] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.293916] vma_interval_tree_remove+0xc75/0xec0 [ 31.294382] vma_prepare+0xc54/0x11a0 [ 31.294755] __split_vma+0x5af/0x950 [ 31.295139] ? __pfx___split_vma+0x10/0x10 [ 31.295549] ? find_held_lock+0x2c/0x110 [ 31.295932] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.296349] ? lock_is_held_type+0x9f/0x120 [ 31.296739] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.297182] ? mtree_range_walk+0x632/0x900 [ 31.297582] ? mas_walk+0x5c7/0x7c0 [ 31.297926] do_vmi_munmap+0x1f1/0x2b0 [ 31.298288] mmap_region+0x1f9/0x2660 [ 31.298642] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.299028] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.299552] ? __pfx_lock_acquire+0x10/0x10 [ 31.299937] ? __pfx_mmap_region+0x10/0x10 [ 31.300316] ? security_mmap_addr+0x7d/0xa0 [ 31.300704] ? get_unmapped_area+0x1f5/0x3f0 [ 31.301106] do_mmap+0x854/0xf00 [ 31.301428] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.301788] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.302194] ksys_mmap_pgoff+0x3af/0x500 [ 31.302564] do_syscall_64+0x3f/0x90 [ 31.302924] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.303407] RIP: 0033:0x7fe1f88ead82 [ 31.303744] 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 [ 31.305316] RSP: 002b:00007ffc148d8cb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.305980] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe1f88ead82 [ 31.306605] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe1f7d24000 [ 31.307233] RBP: 00007fe1f7d24000 R08: 0000000000000009 R09: 0000000000001000 [ 31.307855] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557a7030b980 [ 31.308473] R13: 00007ffc148d8cd0 R14: 00007ffc148d8d00 R15: 00007ffc148d9060 [ 31.309105] [ 31.309316] [ 31.309472] Allocated by task 212: [ 31.309788] kasan_save_stack+0x22/0x50 [ 31.310153] kasan_set_track+0x25/0x30 [ 31.310508] __kasan_slab_alloc+0x59/0x70 [ 31.310906] kmem_cache_alloc+0x16b/0x370 [ 31.311285] vm_area_dup+0x20/0x160 [ 31.311618] __split_vma+0x170/0x950 [ 31.311959] split_vma+0xc6/0x110 [ 31.312275] mprotect_fixup+0x8d2/0xb30 [ 31.312646] do_mprotect_pkey+0x87e/0xd40 [ 31.313022] __x64_sys_mprotect+0x78/0xc0 [ 31.313403] do_syscall_64+0x3f/0x90 [ 31.313747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.314213] [ 31.314370] Freed by task 212: [ 31.314656] kasan_save_stack+0x22/0x50 [ 31.315023] kasan_set_track+0x25/0x30 [ 31.315384] kasan_save_free_info+0x2b/0x50 [ 31.315774] __kasan_slab_free+0x10a/0x190 [ 31.316155] kmem_cache_free+0x10d/0x4d0 [ 31.316527] rcu_core+0x8c8/0x2860 [ 31.316853] __do_softirq+0x1b7/0x7d4 [ 31.317195] [ 31.317348] Last potentially related work creation: [ 31.317773] kasan_save_stack+0x22/0x50 [ 31.318137] __kasan_record_aux_stack+0x8e/0xa0 [ 31.318550] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.319028] remove_vma+0x139/0x170 [ 31.319357] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.319767] do_vmi_munmap+0x1f1/0x2b0 [ 31.320116] __vm_munmap+0x138/0x3a0 [ 31.320459] __x64_sys_munmap+0x59/0x80 [ 31.320824] do_syscall_64+0x3f/0x90 [ 31.321165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.321629] [ 31.321791] The buggy address belongs to the object at ffff88800e56b828 [ 31.321791] which belongs to the cache vm_area_struct of size 168 [ 31.322884] The buggy address is located 88 bytes inside of [ 31.322884] freed 168-byte region [ffff88800e56b828, ffff88800e56b8d0) [ 31.323916] [ 31.324075] The buggy address belongs to the physical page: [ 31.324561] page:0000000080b0dbd6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe56b [ 31.325349] memcg:ffff88800dbb6601 [ 31.325671] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.326141] page_type: 0xffffffff() [ 31.326466] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.327141] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbb6601 [ 31.327803] page dumped because: kasan: bad access detected [ 31.328287] [ 31.328442] Memory state around the buggy address: [ 31.328865] ffff88800e56b780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.329495] ffff88800e56b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.330123] >ffff88800e56b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.330744] ^ [ 31.331052] ffff88800e56b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.331680] ffff88800e56b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.332299] ================================================================== [ 31.333036] Disabling lock debugging due to kernel taint [ 32.909057] BUG: Bad rss-counter state mm:00000000623181ae type:MM_FILEPAGES val:33 [ 32.910284] BUG: Bad rss-counter state mm:00000000623181ae type:MM_ANONPAGES val:22 [ 33.396790] BUG: Bad rss-counter state mm:0000000077b195ec type:MM_FILEPAGES val:33 [ 33.397934] BUG: Bad rss-counter state mm:0000000077b195ec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47774' (ECDSA) to the list of known hosts. 2023/06/19 17:44:15 fuzzer started 2023/06/19 17:44:16 dialing manager at localhost:44161 2023/06/19 17:44:16 checking machine... 2023/06/19 17:44:16 checking revisions... [ 34.040088] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:44:16 testing simple program... [ 34.080870] cgroup: Unknown subsys name 'net' [ 34.121021] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:44:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff818ad8ca RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000023842 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff8880164c3680 R15=ffff88800de3a410 RIP=ffffffff813ad42e 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 00007fda3f7c4900 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=00007ffd4f32f000 CR3=000000001ca16000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880145d7440 RCX=0000000000000001 RDX=1ffff110028bae89 RSI=ffff8880145d7848 RDI=ffff8880145d7448 RBP=ffff8880145d7848 RSP=ffff8880145d7398 R8 =ffffffff863b79e2 R9 =ffff8880145d7480 R10=0000000000038001 R11=000000000008b8fa R12=0000000000000008 R13=ffff8880145d7488 R14=ffff8880145d7850 R15=ffff8880145d7440 RIP=ffffffff81130445 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 00007fd45f654900 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=00007fd45eaa6bf0 CR3=000000000daca000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=0afd9cbf941f88c000000000000ae988 XMM05=47e7ce56d0542cbf00000000001352d8 XMM06=806171799158d96700000000001340c8 XMM07=fb795ef6d657705600000000001246f8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000