syzkaller login: [ 61.110386] BUG: Bad rss-counter state mm:00000000d02c2975 type:MM_FILEPAGES val:33 [ 61.111482] BUG: Bad rss-counter state mm:00000000d02c2975 type:MM_ANONPAGES val:22 [ 61.276588] ================================================================== [ 61.277527] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.278478] Read of size 8 at addr ffff888013f61058 by task sshd/221 [ 61.279420] [ 61.279645] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.280528] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.281552] Call Trace: [ 61.281885] [ 61.282174] dump_stack_lvl+0x91/0xf0 [ 61.282685] print_report+0xcc/0x620 [ 61.283198] ? __virt_addr_valid+0x102/0x340 [ 61.283766] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.284407] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.285033] kasan_report+0xbe/0xf0 [ 61.285524] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.286176] vma_interval_tree_remove+0xc75/0xec0 [ 61.286795] vma_prepare+0xc54/0x11a0 [ 61.287272] __split_vma+0x5af/0x950 [ 61.287748] ? __pfx___split_vma+0x10/0x10 [ 61.288283] ? find_held_lock+0x2c/0x110 [ 61.288805] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.289373] ? lock_is_held_type+0x9f/0x120 [ 61.289913] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.290529] ? mtree_range_walk+0x632/0x900 [ 61.291097] ? mas_walk+0x5c7/0x7c0 [ 61.291578] do_vmi_munmap+0x1f1/0x2b0 [ 61.292073] mmap_region+0x1f9/0x2660 [ 61.292571] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.293086] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.293810] ? __pfx_lock_acquire+0x10/0x10 [ 61.294342] ? __pfx_mmap_region+0x10/0x10 [ 61.294904] ? security_mmap_addr+0x7d/0xa0 [ 61.295441] ? get_unmapped_area+0x1f5/0x3f0 [ 61.295999] do_mmap+0x854/0xf00 [ 61.296437] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.296942] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.297520] ksys_mmap_pgoff+0x3af/0x500 [ 61.298036] do_syscall_64+0x3f/0x90 [ 61.298519] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.299193] RIP: 0033:0x7f018b9dfd82 [ 61.299666] 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 [ 61.301847] RSP: 002b:00007ffcd8b17ee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.302768] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f018b9dfd82 [ 61.303621] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f018ae19000 [ 61.304477] RBP: 00007f018ae19000 R08: 0000000000000009 R09: 0000000000001000 [ 61.305327] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557402c0cb20 [ 61.306177] R13: 00007ffcd8b17f00 R14: 00007ffcd8b17f30 R15: 00007ffcd8b18290 [ 61.307056] [ 61.307350] [ 61.307568] Allocated by task 214: [ 61.307996] kasan_save_stack+0x22/0x50 [ 61.308504] kasan_set_track+0x25/0x30 [ 61.309012] __kasan_slab_alloc+0x59/0x70 [ 61.309546] kmem_cache_alloc+0x16b/0x370 [ 61.310073] vm_area_dup+0x20/0x160 [ 61.310542] __split_vma+0x170/0x950 [ 61.311068] split_vma+0xc6/0x110 [ 61.311508] mprotect_fixup+0x8d2/0xb30 [ 61.312019] do_mprotect_pkey+0x87e/0xd40 [ 61.312553] __x64_sys_mprotect+0x78/0xc0 [ 61.313087] do_syscall_64+0x3f/0x90 [ 61.313580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.314232] [ 61.314452] Freed by task 214: [ 61.314860] kasan_save_stack+0x22/0x50 [ 61.315389] kasan_set_track+0x25/0x30 [ 61.315890] kasan_save_free_info+0x2b/0x50 [ 61.316432] __kasan_slab_free+0x10a/0x190 [ 61.316968] kmem_cache_free+0x10d/0x4d0 [ 61.317491] rcu_core+0x8c8/0x2860 [ 61.317948] __do_softirq+0x1b7/0x7d4 [ 61.318432] [ 61.318654] Last potentially related work creation: [ 61.319261] kasan_save_stack+0x22/0x50 [ 61.319773] __kasan_record_aux_stack+0x8e/0xa0 [ 61.320408] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.321058] remove_vma+0x139/0x170 [ 61.321514] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.322082] do_vmi_munmap+0x1f1/0x2b0 [ 61.322573] __vm_munmap+0x138/0x3a0 [ 61.323054] __x64_sys_munmap+0x59/0x80 [ 61.323559] do_syscall_64+0x3f/0x90 [ 61.324043] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.324701] [ 61.324919] The buggy address belongs to the object at ffff888013f61000 [ 61.324919] which belongs to the cache vm_area_struct of size 168 [ 61.326376] The buggy address is located 88 bytes inside of [ 61.326376] freed 168-byte region [ffff888013f61000, ffff888013f610a8) [ 61.327817] [ 61.328032] The buggy address belongs to the physical page: [ 61.328702] page:000000001dc5e24d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13f61 [ 61.329806] memcg:ffff88800b835b01 [ 61.330235] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.330906] page_type: 0xffffffff() [ 61.331358] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.332287] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b835b01 [ 61.333199] page dumped because: kasan: bad access detected [ 61.333862] [ 61.334080] Memory state around the buggy address: [ 61.334665] ffff888013f60f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 61.335528] ffff888013f60f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 61.336394] >ffff888013f61000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.337254] ^ [ 61.337985] ffff888013f61080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 61.338856] ffff888013f61100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.339714] ================================================================== [ 61.340694] Disabling lock debugging due to kernel taint [ 63.368905] BUG: Bad rss-counter state mm:00000000d0ca1551 type:MM_FILEPAGES val:33 [ 63.370009] BUG: Bad rss-counter state mm:00000000d0ca1551 type:MM_ANONPAGES val:22 [ 63.845212] BUG: Bad rss-counter state mm:0000000091b8cf60 type:MM_FILEPAGES val:33 [ 63.846706] BUG: Bad rss-counter state mm:0000000091b8cf60 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52995' (ECDSA) to the list of known hosts. 2023/06/20 13:21:37 fuzzer started 2023/06/20 13:21:37 dialing manager at localhost:36067 2023/06/20 13:21:37 checking machine... 2023/06/20 13:21:37 checking revisions... [ 64.612890] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:21:38 testing simple program... [ 64.669441] cgroup: Unknown subsys name 'net' [ 64.736973] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:21:37 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffcb3661a48 CR3=000000000e386000 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=2037333a31323a3331203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a31323a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801966f3c0 RCX=0000000000000000 RDX=1ffff110032cde7e RSI=ffffffff8186cb92 RDI=ffff88801966f3f0 RBP=ffff888016b0fd88 RSP=ffff888016b0fd48 R8 =0000000000000007 R9 =fffffffffffff000 R10=ffff88800d7d4f00 R11=00000000000b6a61 R12=ffff88800d7d4f00 R13=ffff888016b0fde0 R14=ffffffff84d2fb80 R15=ffff888008f7a000 RIP=ffffffff8186cc9f 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 00007f49847e6900 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=00007f4984d9e0b0 CR3=000000000c646000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000