syzkaller login: [ 24.211643] BUG: Bad rss-counter state mm:0000000069f17b70 type:MM_FILEPAGES val:33 [ 24.212575] BUG: Bad rss-counter state mm:0000000069f17b70 type:MM_ANONPAGES val:22 [ 24.249721] ================================================================== [ 24.250611] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.251605] Read of size 8 at addr ffff888019c39b38 by task sshd/219 [ 24.252495] [ 24.252713] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.253558] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.254948] Call Trace: [ 24.255288] [ 24.255618] dump_stack_lvl+0x91/0xf0 [ 24.256102] print_report+0xcc/0x620 [ 24.256578] ? __virt_addr_valid+0x102/0x340 [ 24.257127] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.257825] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.258442] kasan_report+0xbe/0xf0 [ 24.258916] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.259651] vma_interval_tree_remove+0xc75/0xec0 [ 24.260334] vma_prepare+0xc54/0x11a0 [ 24.260824] __split_vma+0x5af/0x950 [ 24.261290] ? __pfx___split_vma+0x10/0x10 [ 24.261814] ? find_held_lock+0x2c/0x110 [ 24.262338] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.262899] ? lock_is_held_type+0x9f/0x120 [ 24.263435] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.264033] ? mtree_range_walk+0x632/0x900 [ 24.264580] ? mas_walk+0x5c7/0x7c0 [ 24.265045] do_vmi_munmap+0x1f1/0x2b0 [ 24.265534] mmap_region+0x1f9/0x2660 [ 24.266025] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.266528] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.267235] ? __pfx_lock_acquire+0x10/0x10 [ 24.267760] ? __pfx_mmap_region+0x10/0x10 [ 24.268280] ? security_mmap_addr+0x7d/0xa0 [ 24.268802] ? get_unmapped_area+0x1f5/0x3f0 [ 24.269341] do_mmap+0x854/0xf00 [ 24.269776] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.270275] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.270841] ksys_mmap_pgoff+0x3af/0x500 [ 24.271336] do_syscall_64+0x3f/0x90 [ 24.271810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.272450] RIP: 0033:0x7f513fd6cd82 [ 24.272899] 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 [ 24.275015] RSP: 002b:00007ffd46825f18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.275905] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f513fd6cd82 [ 24.276745] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f513f1a6000 [ 24.277593] RBP: 00007f513f1a6000 R08: 0000000000000009 R09: 0000000000001000 [ 24.278454] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557a44d6ff70 [ 24.279321] R13: 00007ffd46825f30 R14: 00007ffd46825f60 R15: 00007ffd468262c0 [ 24.280199] [ 24.280495] [ 24.280718] Allocated by task 212: [ 24.281157] kasan_save_stack+0x22/0x50 [ 24.281673] kasan_set_track+0x25/0x30 [ 24.282187] __kasan_slab_alloc+0x59/0x70 [ 24.282724] kmem_cache_alloc+0x16b/0x370 [ 24.283254] vm_area_dup+0x20/0x160 [ 24.283717] __split_vma+0x170/0x950 [ 24.284195] split_vma+0xc6/0x110 [ 24.284640] mprotect_fixup+0x8d2/0xb30 [ 24.285162] do_mprotect_pkey+0x87e/0xd40 [ 24.285698] __x64_sys_mprotect+0x78/0xc0 [ 24.286248] do_syscall_64+0x3f/0x90 [ 24.286730] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.287388] [ 24.287606] Freed by task 212: [ 24.288000] kasan_save_stack+0x22/0x50 [ 24.288511] kasan_set_track+0x25/0x30 [ 24.289021] kasan_save_free_info+0x2b/0x50 [ 24.289563] __kasan_slab_free+0x10a/0x190 [ 24.290118] kmem_cache_free+0x10d/0x4d0 [ 24.290637] rcu_core+0x8c8/0x2860 [ 24.291096] __do_softirq+0x1b7/0x7d4 [ 24.291587] [ 24.291814] Last potentially related work creation: [ 24.292419] kasan_save_stack+0x22/0x50 [ 24.292931] __kasan_record_aux_stack+0x8e/0xa0 [ 24.293517] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.294187] remove_vma+0x139/0x170 [ 24.294649] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.295212] do_vmi_munmap+0x1f1/0x2b0 [ 24.295708] __vm_munmap+0x138/0x3a0 [ 24.296243] __x64_sys_munmap+0x59/0x80 [ 24.296751] do_syscall_64+0x3f/0x90 [ 24.297233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.297892] [ 24.298124] The buggy address belongs to the object at ffff888019c39ae0 [ 24.298124] which belongs to the cache vm_area_struct of size 168 [ 24.299634] The buggy address is located 88 bytes inside of [ 24.299634] freed 168-byte region [ffff888019c39ae0, ffff888019c39b88) [ 24.301071] [ 24.301291] The buggy address belongs to the physical page: [ 24.301996] page:00000000e85b8829 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c39 [ 24.303114] memcg:ffff88800cf4df01 [ 24.303553] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.304212] page_type: 0xffffffff() [ 24.304672] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.305618] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cf4df01 [ 24.306574] page dumped because: kasan: bad access detected [ 24.307250] [ 24.307471] Memory state around the buggy address: [ 24.308074] ffff888019c39a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.308956] ffff888019c39a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 24.309831] >ffff888019c39b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.310723] ^ [ 24.311355] ffff888019c39b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.312244] ffff888019c39c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.313230] ================================================================== [ 24.314245] Disabling lock debugging due to kernel taint [ 26.566646] BUG: Bad rss-counter state mm:000000004e7ad144 type:MM_FILEPAGES val:33 [ 26.567675] BUG: Bad rss-counter state mm:000000004e7ad144 type:MM_ANONPAGES val:22 [ 27.048833] BUG: Bad rss-counter state mm:00000000666084cd type:MM_FILEPAGES val:33 [ 27.049805] BUG: Bad rss-counter state mm:00000000666084cd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47986' (ECDSA) to the list of known hosts. 2023/06/21 02:23:52 fuzzer started 2023/06/21 02:23:52 dialing manager at localhost:36067 2023/06/21 02:23:52 checking machine... 2023/06/21 02:23:52 checking revisions... [ 27.752185] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:23:52 testing simple program... [ 27.793061] cgroup: Unknown subsys name 'net' [ 27.837373] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:23:52 Registers: info registers vcpu 0 RAX=00007fbcfaf72b31 RBX=0000000000000001 RCX=ffffffff864bbb54 RDX=0000000000000002 RSI=0000000000000000 RDI=ffff88801659ff78 RBP=ffff88801659f9ca RSP=ffff88801659f918 R8 =ffffffff864bbb58 R9 =ffff88801659f9c8 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88801659ff58 R13=ffff88801659f9d0 R14=ffff88801659ff58 R15=ffff88801659f988 RIP=ffffffff81131eec RFL=00000202 [-------] 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 00007fbcfaf97900 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=00007ffca154b000 CR3=000000000e642000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f4d428f9340 CR3=000000000c98a000 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=7474f8a77e6b3fad4749041cae0ce999 XMM02=000000000011a180ec2efd57dc4c00df XMM03=0000000000121008f22b94a383e2771c XMM04=b469e85bb56c9ccb00000000000ae988 XMM05=79c9284419586f970000000000131fa0 XMM06=806171799158d9670000000000130cd0 XMM07=e042d86d42eb936e00000000001212e0 XMM08=f22b94a383e2771c000000000011a1e0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000