syzkaller login: [ 56.187209] BUG: Bad rss-counter state mm:000000007e304c3e type:MM_FILEPAGES val:33 [ 56.188699] BUG: Bad rss-counter state mm:000000007e304c3e type:MM_ANONPAGES val:22 [ 56.353883] ================================================================== [ 56.354974] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 56.355944] Read of size 8 at addr ffff888018f07df0 by task sshd/219 [ 56.356870] [ 56.357095] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 56.357988] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 56.359033] Call Trace: [ 56.359382] <TASK> [ 56.359667] dump_stack_lvl+0x91/0xf0 [ 56.360185] print_report+0xcc/0x620 [ 56.360672] ? __virt_addr_valid+0x102/0x340 [ 56.361256] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.361882] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.362554] kasan_report+0xbe/0xf0 [ 56.363059] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.363697] vma_interval_tree_remove+0xc75/0xec0 [ 56.364320] vma_prepare+0xc54/0x11a0 [ 56.364822] __split_vma+0x5af/0x950 [ 56.365298] ? __pfx___split_vma+0x10/0x10 [ 56.365840] ? find_held_lock+0x2c/0x110 [ 56.366361] do_vmi_align_munmap+0x2ba/0x11f0 [ 56.366973] ? lock_is_held_type+0x9f/0x120 [ 56.367520] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 56.368139] ? mtree_range_walk+0x632/0x900 [ 56.368706] ? mas_walk+0x5c7/0x7c0 [ 56.369179] do_vmi_munmap+0x1f1/0x2b0 [ 56.369705] mmap_region+0x1f9/0x2660 [ 56.370195] ? vm_mmap_pgoff+0x15c/0x3a0 [ 56.370743] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 56.371474] ? __pfx_lock_acquire+0x10/0x10 [ 56.372009] ? __pfx_mmap_region+0x10/0x10 [ 56.372580] ? security_mmap_addr+0x7d/0xa0 [ 56.373125] ? get_unmapped_area+0x1f5/0x3f0 [ 56.373693] do_mmap+0x854/0xf00 [ 56.374150] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.374696] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 56.375281] ksys_mmap_pgoff+0x3af/0x500 [ 56.375795] do_syscall_64+0x3f/0x90 [ 56.376297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.376950] RIP: 0033:0x7fd489c3ed82 [ 56.377424] 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 [ 56.379607] RSP: 002b:00007ffe1f969658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 56.380532] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd489c3ed82 [ 56.381402] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd489078000 [ 56.382272] RBP: 00007fd489078000 R08: 0000000000000009 R09: 0000000000001000 [ 56.383164] R10: 0000000000000812 R11: 0000000000000206 R12: 000056329969aec0 [ 56.384031] R13: 00007ffe1f969670 R14: 00007ffe1f9696a0 R15: 00007ffe1f969a00 [ 56.384919] </TASK> [ 56.385216] [ 56.385430] Allocated by task 212: [ 56.385869] kasan_save_stack+0x22/0x50 [ 56.386384] kasan_set_track+0x25/0x30 [ 56.386923] __kasan_slab_alloc+0x59/0x70 [ 56.387475] kmem_cache_alloc+0x16b/0x370 [ 56.388001] vm_area_dup+0x20/0x160 [ 56.388473] __split_vma+0x170/0x950 [ 56.388947] split_vma+0xc6/0x110 [ 56.389405] mprotect_fixup+0x8d2/0xb30 [ 56.389910] do_mprotect_pkey+0x87e/0xd40 [ 56.390455] __x64_sys_mprotect+0x78/0xc0 [ 56.391006] do_syscall_64+0x3f/0x90 [ 56.391512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.392166] [ 56.392381] Freed by task 212: [ 56.392777] kasan_save_stack+0x22/0x50 [ 56.393328] kasan_set_track+0x25/0x30 [ 56.393836] kasan_save_free_info+0x2b/0x50 [ 56.394394] __kasan_slab_free+0x10a/0x190 [ 56.394982] kmem_cache_free+0x10d/0x4d0 [ 56.395505] rcu_core+0x8c8/0x2860 [ 56.395970] __do_softirq+0x1b7/0x7d4 [ 56.396456] [ 56.396676] Last potentially related work creation: [ 56.397286] kasan_save_stack+0x22/0x50 [ 56.397889] __kasan_record_aux_stack+0x8e/0xa0 [ 56.398468] __call_rcu_common.constprop.0+0x6a/0xb90 [ 56.399157] remove_vma+0x139/0x170 [ 56.399631] do_vmi_align_munmap+0xd4a/0x11f0 [ 56.400193] do_vmi_munmap+0x1f1/0x2b0 [ 56.400707] __vm_munmap+0x138/0x3a0 [ 56.401178] __x64_sys_munmap+0x59/0x80 [ 56.401690] do_syscall_64+0x3f/0x90 [ 56.402161] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.402851] [ 56.403071] The buggy address belongs to the object at ffff888018f07d98 [ 56.403071] which belongs to the cache vm_area_struct of size 168 [ 56.404589] The buggy address is located 88 bytes inside of [ 56.404589] freed 168-byte region [ffff888018f07d98, ffff888018f07e40) [ 56.406048] [ 56.406288] The buggy address belongs to the physical page: [ 56.407002] page:00000000754ba91d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f07 [ 56.408189] memcg:ffff8880135cf301 [ 56.408624] flags: 0x100000000000200(slab|node=0|zone=1) [ 56.409299] page_type: 0xffffffff() [ 56.409755] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 56.410714] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880135cf301 [ 56.411642] page dumped because: kasan: bad access detected [ 56.412332] [ 56.412551] Memory state around the buggy address: [ 56.413169] ffff888018f07c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 56.414057] ffff888018f07d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 56.414945] >ffff888018f07d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 56.415887] ^ [ 56.416724] ffff888018f07e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 56.417606] ffff888018f07e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 56.418504] ================================================================== [ 56.419515] Disabling lock debugging due to kernel taint [ 58.479169] BUG: Bad rss-counter state mm:00000000250e3b09 type:MM_FILEPAGES val:33 [ 58.480809] BUG: Bad rss-counter state mm:00000000250e3b09 type:MM_ANONPAGES val:22 [ 59.039339] BUG: Bad rss-counter state mm:000000009d3df7e4 type:MM_FILEPAGES val:33 [ 59.040491] BUG: Bad rss-counter state mm:000000009d3df7e4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38768' (ECDSA) to the list of known hosts. 2023/06/20 07:54:04 fuzzer started 2023/06/20 07:54:04 dialing manager at localhost:44161 2023/06/20 07:54:04 checking machine... 2023/06/20 07:54:04 checking revisions... [ 59.675909] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:54:04 testing simple program... [ 59.724605] cgroup: Unknown subsys name 'net' [ 59.776172] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:53:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800ec59f30 RCX=ffff88800ec59000 RDX=0000000000000080 RSI=ffff88800ec59e40 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff888008d7fca0 R8 =0000000000000130 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000128 R12=ffff88800844f780 R13=ffffea000066de80 R14=ffffffff813782a8 R15=ffff888019b7a398 RIP=ffffffff8180ee70 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 0000000000000000 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=00007ffd2adf3000 CR3=0000000018dd8000 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=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=00007ff307725000 CR3=000000000c7c6000 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=91781f2354adaca0fd4393930462bbb4 XMM02=ec2efd57dc4c00df000000000011cbe8 XMM03=576a03c94505c3db000000000011ccb8 XMM04=16c62bc1fbad26ad00000000000ae988 XMM05=8a5dffb7e5179d670000000000134768 XMM06=806171799158d96700000000001334a8 XMM07=e042d86d42eb936e0000000000123d80 XMM08=576a03c94505c3db000000000011ccb8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000