syzkaller login: [ 35.199609] BUG: Bad rss-counter state mm:0000000081ffa0a9 type:MM_FILEPAGES val:33 [ 35.200935] BUG: Bad rss-counter state mm:0000000081ffa0a9 type:MM_ANONPAGES val:22 [ 35.238223] ================================================================== [ 35.239220] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.240153] Read of size 8 at addr ffff888017e17c20 by task sshd/220 [ 35.241017] [ 35.241239] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.242087] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.243056] Call Trace: [ 35.243373] [ 35.243655] dump_stack_lvl+0x91/0xf0 [ 35.244139] print_report+0xcc/0x620 [ 35.244616] ? __virt_addr_valid+0x102/0x340 [ 35.245177] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.245789] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.246398] kasan_report+0xbe/0xf0 [ 35.246866] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.247478] vma_interval_tree_remove+0xc75/0xec0 [ 35.248088] vma_prepare+0xc54/0x11a0 [ 35.248582] __split_vma+0x5af/0x950 [ 35.249077] ? __pfx___split_vma+0x10/0x10 [ 35.249618] ? find_held_lock+0x2c/0x110 [ 35.250154] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.250731] ? lock_is_held_type+0x9f/0x120 [ 35.251288] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.251921] ? mtree_range_walk+0x632/0x900 [ 35.252489] ? mas_walk+0x5c7/0x7c0 [ 35.252993] do_vmi_munmap+0x1f1/0x2b0 [ 35.253502] mmap_region+0x1f9/0x2660 [ 35.253996] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.254525] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.255264] ? __pfx_lock_acquire+0x10/0x10 [ 35.255821] ? __pfx_mmap_region+0x10/0x10 [ 35.256368] ? security_mmap_addr+0x7d/0xa0 [ 35.256925] ? get_unmapped_area+0x1f5/0x3f0 [ 35.257493] do_mmap+0x854/0xf00 [ 35.257942] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.258455] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.259027] ksys_mmap_pgoff+0x3af/0x500 [ 35.259548] do_syscall_64+0x3f/0x90 [ 35.260037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.260726] RIP: 0033:0x7fc1097f5d82 [ 35.261200] 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 [ 35.263406] RSP: 002b:00007ffe04c01378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.264331] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc1097f5d82 [ 35.265210] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc108c2f000 [ 35.266089] RBP: 00007fc108c2f000 R08: 0000000000000009 R09: 0000000000001000 [ 35.266966] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bddbe2e980 [ 35.267840] R13: 00007ffe04c01390 R14: 00007ffe04c013c0 R15: 00007ffe04c01720 [ 35.268726] [ 35.269027] [ 35.269248] Allocated by task 213: [ 35.269688] kasan_save_stack+0x22/0x50 [ 35.270207] kasan_set_track+0x25/0x30 [ 35.270713] __kasan_slab_alloc+0x59/0x70 [ 35.271251] kmem_cache_alloc+0x16b/0x370 [ 35.271781] vm_area_dup+0x20/0x160 [ 35.272258] __split_vma+0x170/0x950 [ 35.272754] split_vma+0xc6/0x110 [ 35.273201] mprotect_fixup+0x8d2/0xb30 [ 35.273722] do_mprotect_pkey+0x87e/0xd40 [ 35.274253] __x64_sys_mprotect+0x78/0xc0 [ 35.274791] do_syscall_64+0x3f/0x90 [ 35.275283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.275951] [ 35.276170] Freed by task 213: [ 35.276575] kasan_save_stack+0x22/0x50 [ 35.277142] kasan_set_track+0x25/0x30 [ 35.277664] kasan_save_free_info+0x2b/0x50 [ 35.278237] __kasan_slab_free+0x10a/0x190 [ 35.278801] kmem_cache_free+0x10d/0x4d0 [ 35.279345] rcu_core+0x8c8/0x2860 [ 35.279823] __do_softirq+0x1b7/0x7d4 [ 35.280332] [ 35.280558] Last potentially related work creation: [ 35.281208] kasan_save_stack+0x22/0x50 [ 35.281743] __kasan_record_aux_stack+0x8e/0xa0 [ 35.282356] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.283045] remove_vma+0x139/0x170 [ 35.283525] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.284119] do_vmi_munmap+0x1f1/0x2b0 [ 35.284635] __vm_munmap+0x138/0x3a0 [ 35.285154] __x64_sys_munmap+0x59/0x80 [ 35.285680] do_syscall_64+0x3f/0x90 [ 35.286187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.286864] [ 35.287093] The buggy address belongs to the object at ffff888017e17bc8 [ 35.287093] which belongs to the cache vm_area_struct of size 168 [ 35.288676] The buggy address is located 88 bytes inside of [ 35.288676] freed 168-byte region [ffff888017e17bc8, ffff888017e17c70) [ 35.290190] [ 35.290420] The buggy address belongs to the physical page: [ 35.291134] page:00000000f29e5882 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17e17 [ 35.292312] memcg:ffff88800e380e01 [ 35.292773] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.293443] page_type: 0xffffffff() [ 35.293902] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.294814] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e380e01 [ 35.295717] page dumped because: kasan: bad access detected [ 35.296369] [ 35.296581] Memory state around the buggy address: [ 35.297169] ffff888017e17b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.298033] ffff888017e17b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 35.298921] >ffff888017e17c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 35.299804] ^ [ 35.300353] ffff888017e17c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 35.301254] ffff888017e17d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 35.302134] ================================================================== [ 35.303383] Disabling lock debugging due to kernel taint [ 37.379671] BUG: Bad rss-counter state mm:000000005cdbc82c type:MM_FILEPAGES val:33 [ 37.380645] BUG: Bad rss-counter state mm:000000005cdbc82c type:MM_ANONPAGES val:22 [ 37.858406] BUG: Bad rss-counter state mm:00000000a9c6b66a type:MM_FILEPAGES val:33 [ 37.859402] BUG: Bad rss-counter state mm:00000000a9c6b66a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48444' (ECDSA) to the list of known hosts. 2023/06/19 21:31:34 fuzzer started 2023/06/19 21:31:35 dialing manager at localhost:44161 2023/06/19 21:31:35 checking machine... 2023/06/19 21:31:35 checking revisions... [ 38.488643] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:31:35 testing simple program... [ 38.535575] cgroup: Unknown subsys name 'net' [ 38.576046] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:31:30 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888016780000 RCX=ffff88800fcd7958 RDX=0000000000000000 RSI=ffff8880167801b8 RDI=ffff888016780000 RBP=ffff8880167803e0 RSP=ffff88800fcd7768 R8 =ffff88800fcd7a08 R9 =ffff88800fcd78a0 R10=0000000000000000 R11=0000000000000000 R12=ffff8880167801b8 R13=ffff88800fcd78a0 R14=dffffc0000000000 R15=0000000000000000 RIP=ffffffff814c07eb 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 00007fd6092e0900 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=00007fd609897618 CR3=0000000017d40000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007f3065a6ea70 CR3=0000000009f46000 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=00000000000000000000000000000000 XMM01=91d9830024634ba3cb44be9cadea98a8 XMM02=ec2efd57dc4c00df000000000011d160 XMM03=834bc80db88a5a02000000000011d230 XMM04=50de930999b8236c00000000000ae988 XMM05=19e9129bd510f23500000000001346d8 XMM06=2b9bcda8518034ff0000000000133540 XMM07=e042d86d42eb936e0000000000124b00 XMM08=834bc80db88a5a02000000000011d230 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000