syzkaller login: [ 32.438687] BUG: Bad rss-counter state mm:00000000512ac75c type:MM_FILEPAGES val:33 [ 32.439854] BUG: Bad rss-counter state mm:00000000512ac75c type:MM_ANONPAGES val:22 [ 32.600804] ================================================================== [ 32.601879] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.603029] Read of size 8 at addr ffff88800e7a6058 by task sshd/221 [ 32.604031] [ 32.604248] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.605113] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.606141] Call Trace: [ 32.606463] [ 32.606749] dump_stack_lvl+0x91/0xf0 [ 32.607234] print_report+0xcc/0x620 [ 32.607718] ? __virt_addr_valid+0x102/0x340 [ 32.608270] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.608891] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.609502] kasan_report+0xbe/0xf0 [ 32.609975] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.610608] vma_interval_tree_remove+0xc75/0xec0 [ 32.611206] vma_prepare+0xc54/0x11a0 [ 32.611686] __split_vma+0x5af/0x950 [ 32.612164] ? __pfx___split_vma+0x10/0x10 [ 32.612690] ? find_held_lock+0x2c/0x110 [ 32.613207] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.613785] ? lock_is_held_type+0x9f/0x120 [ 32.614342] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.614947] ? mtree_range_walk+0x632/0x900 [ 32.615503] ? mas_walk+0x5c7/0x7c0 [ 32.615979] do_vmi_munmap+0x1f1/0x2b0 [ 32.616471] mmap_region+0x1f9/0x2660 [ 32.616955] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.617465] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.618182] ? __pfx_lock_acquire+0x10/0x10 [ 32.618715] ? __pfx_mmap_region+0x10/0x10 [ 32.619244] ? security_mmap_addr+0x7d/0xa0 [ 32.619779] ? get_unmapped_area+0x1f5/0x3f0 [ 32.620328] do_mmap+0x854/0xf00 [ 32.620771] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.621264] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.621835] ksys_mmap_pgoff+0x3af/0x500 [ 32.622349] do_syscall_64+0x3f/0x90 [ 32.622825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.623466] RIP: 0033:0x7f331ae80d82 [ 32.623926] 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 [ 32.626043] RSP: 002b:00007fffe94661d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.626985] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f331ae80d82 [ 32.627830] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f331a2ba000 [ 32.628672] RBP: 00007f331a2ba000 R08: 0000000000000009 R09: 0000000000001000 [ 32.629518] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b6f6fbec0 [ 32.630373] R13: 00007fffe94661f0 R14: 00007fffe9466220 R15: 00007fffe9466580 [ 32.631245] [ 32.631548] [ 32.631762] Allocated by task 213: [ 32.632190] kasan_save_stack+0x22/0x50 [ 32.632696] kasan_set_track+0x25/0x30 [ 32.633189] __kasan_slab_alloc+0x59/0x70 [ 32.633724] kmem_cache_alloc+0x16b/0x370 [ 32.634267] vm_area_dup+0x20/0x160 [ 32.634730] __split_vma+0x170/0x950 [ 32.635208] split_vma+0xc6/0x110 [ 32.635658] mprotect_fixup+0x8d2/0xb30 [ 32.636168] do_mprotect_pkey+0x87e/0xd40 [ 32.636693] __x64_sys_mprotect+0x78/0xc0 [ 32.637219] do_syscall_64+0x3f/0x90 [ 32.637703] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.638374] [ 32.638593] Freed by task 213: [ 32.638997] kasan_save_stack+0x22/0x50 [ 32.639500] kasan_set_track+0x25/0x30 [ 32.640004] kasan_save_free_info+0x2b/0x50 [ 32.640549] __kasan_slab_free+0x10a/0x190 [ 32.641097] kmem_cache_free+0x10d/0x4d0 [ 32.641608] rcu_core+0x8c8/0x2860 [ 32.642066] __do_softirq+0x1b7/0x7d4 [ 32.642555] [ 32.642770] Last potentially related work creation: [ 32.643365] kasan_save_stack+0x22/0x50 [ 32.643867] __kasan_record_aux_stack+0x8e/0xa0 [ 32.644440] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.645086] remove_vma+0x139/0x170 [ 32.645541] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.646106] do_vmi_munmap+0x1f1/0x2b0 [ 32.646603] __vm_munmap+0x138/0x3a0 [ 32.647075] __x64_sys_munmap+0x59/0x80 [ 32.647571] do_syscall_64+0x3f/0x90 [ 32.648057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.648703] [ 32.648917] Second to last potentially related work creation: [ 32.649615] kasan_save_stack+0x22/0x50 [ 32.650159] __kasan_record_aux_stack+0x8e/0xa0 [ 32.650749] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.651444] remove_vma+0x139/0x170 [ 32.651900] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.652479] do_vmi_munmap+0x1f1/0x2b0 [ 32.652973] mmap_region+0x1f9/0x2660 [ 32.653460] do_mmap+0x854/0xf00 [ 32.653903] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.654405] ksys_mmap_pgoff+0x3af/0x500 [ 32.654917] do_syscall_64+0x3f/0x90 [ 32.655397] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.656050] [ 32.656270] The buggy address belongs to the object at ffff88800e7a6000 [ 32.656270] which belongs to the cache vm_area_struct of size 168 [ 32.657753] The buggy address is located 88 bytes inside of [ 32.657753] freed 168-byte region [ffff88800e7a6000, ffff88800e7a60a8) [ 32.659191] [ 32.659410] The buggy address belongs to the physical page: [ 32.660090] page:0000000074d0d870 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7a6 [ 32.661210] memcg:ffff88800ea12f01 [ 32.661646] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.662367] page_type: 0xffffffff() [ 32.662838] raw: 0100000000000200 ffff88800879fc80 ffffea0000675a80 dead000000000003 [ 32.663762] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea12f01 [ 32.664675] page dumped because: kasan: bad access detected [ 32.665333] [ 32.665550] Memory state around the buggy address: [ 32.666141] ffff88800e7a5f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 32.666992] ffff88800e7a5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.667848] >ffff88800e7a6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.668702] ^ [ 32.669424] ffff88800e7a6080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.670304] ffff88800e7a6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.671159] ================================================================== [ 32.672204] Disabling lock debugging due to kernel taint [ 34.450135] BUG: Bad rss-counter state mm:00000000d71215c7 type:MM_FILEPAGES val:33 [ 34.451167] BUG: Bad rss-counter state mm:00000000d71215c7 type:MM_ANONPAGES val:22 [ 34.887162] BUG: Bad rss-counter state mm:000000008bb7febe type:MM_FILEPAGES val:33 [ 34.888287] BUG: Bad rss-counter state mm:000000008bb7febe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35014' (ECDSA) to the list of known hosts. 2023/06/20 04:31:17 fuzzer started 2023/06/20 04:31:18 dialing manager at localhost:44161 2023/06/20 04:31:18 checking machine... 2023/06/20 04:31:18 checking revisions... [ 35.506298] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:31:18 testing simple program... [ 35.556339] cgroup: Unknown subsys name 'net' [ 35.602045] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:31:14 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=ffffffff812d869a RDX=1ffff1100d9c135e RSI=ffffffff86605973 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a88 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800e132080 RIP=ffffffff813ad42f RFL=00000282 [--S----] 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=00007f281a494b50 CR3=000000000f708000 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=75ec369ec1ada99fdc4d9044c4877c95 XMM02=000000000011c800ec2efd57dc4c00df XMM03=00000000001235182043139008dccff9 XMM04=1ab9a6bb8d8836de00000000000ae988 XMM05=e4cb8bb95a7664b60000000000134b70 XMM06=8237b38a0442aebd00000000001339d8 XMM07=e042d86d42eb936e0000000000123798 XMM08=2043139008dccff9000000000011c860 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffea00006a69c0 RBX=ffffea00006a4500 RCX=ffffffff812e0423 RDX=0000000000000000 RSI=ffffea00006a4500 RDI=ffff8880087c7140 RBP=ffff88801023fa28 RSP=ffff88801023f9a0 R8 =0000000000000000 R9 =ffffed100d9e8028 R10=ffff88806cf40143 R11=00000000000b6996 R12=ffff8880087c7140 R13=ffff8880087bb300 R14=ffffea00006a1cc0 R15=00000000800d0000 RIP=ffffffff81805d7a 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 00007f332c71c900 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=00007fff5b4fe000 CR3=000000001c97c000 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=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