syzkaller login: [ 30.999238] BUG: Bad rss-counter state mm:00000000bd972127 type:MM_FILEPAGES val:33 [ 31.001388] BUG: Bad rss-counter state mm:00000000bd972127 type:MM_ANONPAGES val:22 [ 31.168985] ================================================================== [ 31.169690] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.170438] Read of size 8 at addr ffff88800d975798 by task sshd/223 [ 31.171034] [ 31.171208] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.171916] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.172663] Call Trace: [ 31.173038] [ 31.173380] dump_stack_lvl+0x91/0xf0 [ 31.174184] print_report+0xcc/0x620 [ 31.174771] ? __virt_addr_valid+0x102/0x340 [ 31.175458] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.176279] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.176884] kasan_report+0xbe/0xf0 [ 31.177148] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.177488] vma_interval_tree_remove+0xc75/0xec0 [ 31.177829] vma_prepare+0xc54/0x11a0 [ 31.178092] __split_vma+0x5af/0x950 [ 31.178350] ? __pfx___split_vma+0x10/0x10 [ 31.178643] ? find_held_lock+0x2c/0x110 [ 31.178946] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.179268] ? lock_is_held_type+0x9f/0x120 [ 31.179576] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.179962] ? mtree_range_walk+0x632/0x900 [ 31.180279] ? mas_walk+0x5c7/0x7c0 [ 31.180553] do_vmi_munmap+0x1f1/0x2b0 [ 31.180844] mmap_region+0x1f9/0x2660 [ 31.181122] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.181416] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.181838] ? __pfx_lock_acquire+0x10/0x10 [ 31.182148] ? __pfx_mmap_region+0x10/0x10 [ 31.182451] ? security_mmap_addr+0x7d/0xa0 [ 31.182758] ? get_unmapped_area+0x1f5/0x3f0 [ 31.183081] do_mmap+0x854/0xf00 [ 31.183337] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.183618] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.183972] ksys_mmap_pgoff+0x3af/0x500 [ 31.184267] do_syscall_64+0x3f/0x90 [ 31.184544] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.184932] RIP: 0033:0x7f110dcfcd82 [ 31.185195] 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 [ 31.186425] RSP: 002b:00007ffdc8b53178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.186953] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f110dcfcd82 [ 31.187444] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f110d136000 [ 31.187962] RBP: 00007f110d136000 R08: 0000000000000009 R09: 0000000000001000 [ 31.188447] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558311265b20 [ 31.188945] R13: 00007ffdc8b53190 R14: 00007ffdc8b531c0 R15: 00007ffdc8b53520 [ 31.189441] [ 31.189610] [ 31.189734] Allocated by task 216: [ 31.189989] kasan_save_stack+0x22/0x50 [ 31.190274] kasan_set_track+0x25/0x30 [ 31.190557] __kasan_slab_alloc+0x59/0x70 [ 31.190865] kmem_cache_alloc+0x16b/0x370 [ 31.191163] vm_area_dup+0x20/0x160 [ 31.191421] __split_vma+0x170/0x950 [ 31.191689] split_vma+0xc6/0x110 [ 31.191958] mprotect_fixup+0x8d2/0xb30 [ 31.192247] do_mprotect_pkey+0x87e/0xd40 [ 31.192544] __x64_sys_mprotect+0x78/0xc0 [ 31.192848] do_syscall_64+0x3f/0x90 [ 31.193116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.193478] [ 31.193598] Freed by task 216: [ 31.193830] kasan_save_stack+0x22/0x50 [ 31.194120] kasan_set_track+0x25/0x30 [ 31.194401] kasan_save_free_info+0x2b/0x50 [ 31.194705] __kasan_slab_free+0x10a/0x190 [ 31.195013] kmem_cache_free+0x10d/0x4d0 [ 31.195312] rcu_core+0x8c8/0x2860 [ 31.195564] __do_softirq+0x1b7/0x7d4 [ 31.195859] [ 31.195982] Last potentially related work creation: [ 31.196313] kasan_save_stack+0x22/0x50 [ 31.196603] __kasan_record_aux_stack+0x8e/0xa0 [ 31.196943] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.197315] remove_vma+0x139/0x170 [ 31.197573] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.197896] do_vmi_munmap+0x1f1/0x2b0 [ 31.198177] __vm_munmap+0x138/0x3a0 [ 31.198457] __x64_sys_munmap+0x59/0x80 [ 31.198726] do_syscall_64+0x3f/0x90 [ 31.198997] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.199348] [ 31.199464] Second to last potentially related work creation: [ 31.199864] kasan_save_stack+0x22/0x50 [ 31.200138] __kasan_record_aux_stack+0x8e/0xa0 [ 31.200449] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.200805] remove_vma+0x139/0x170 [ 31.201059] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.201360] do_vmi_munmap+0x1f1/0x2b0 [ 31.201632] mmap_region+0x1f9/0x2660 [ 31.201905] do_mmap+0x854/0xf00 [ 31.202147] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.202414] ksys_mmap_pgoff+0x3af/0x500 [ 31.202687] do_syscall_64+0x3f/0x90 [ 31.202957] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.203311] [ 31.203429] The buggy address belongs to the object at ffff88800d975740 [ 31.203429] which belongs to the cache vm_area_struct of size 168 [ 31.204252] The buggy address is located 88 bytes inside of [ 31.204252] freed 168-byte region [ffff88800d975740, ffff88800d9757e8) [ 31.205031] [ 31.205147] The buggy address belongs to the physical page: [ 31.205510] page:00000000947af2bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd975 [ 31.206119] memcg:ffff88800f41c001 [ 31.206354] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.206708] page_type: 0xffffffff() [ 31.206964] raw: 0100000000000200 ffff8880087a0c80 ffffea000032ccc0 dead000000000004 [ 31.207467] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f41c001 [ 31.207981] page dumped because: kasan: bad access detected [ 31.208343] [ 31.208459] Memory state around the buggy address: [ 31.208776] ffff88800d975680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.209247] ffff88800d975700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.209723] >ffff88800d975780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.210196] ^ [ 31.210465] ffff88800d975800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.210948] ffff88800d975880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.211414] ================================================================== [ 31.211993] Disabling lock debugging due to kernel taint [ 32.599362] BUG: Bad rss-counter state mm:00000000ee5d48a8 type:MM_FILEPAGES val:33 [ 32.599944] BUG: Bad rss-counter state mm:00000000ee5d48a8 type:MM_ANONPAGES val:22 [ 32.944497] BUG: Bad rss-counter state mm:000000001b36ea81 type:MM_FILEPAGES val:33 [ 32.945246] BUG: Bad rss-counter state mm:000000001b36ea81 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54066' (ECDSA) to the list of known hosts. 2023/06/21 04:13:35 fuzzer started 2023/06/21 04:13:35 dialing manager at localhost:36067 2023/06/21 04:13:35 checking machine... 2023/06/21 04:13:35 checking revisions... [ 33.654275] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:13:35 testing simple program... [ 33.703105] cgroup: Unknown subsys name 'net' [ 33.739667] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:13:35 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=0000000000000001 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=00007ffc36829428 CR3=0000000005482000 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=00007fa15551551000005576105f2790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff813782f7 RDX=dffffc0000000000 RSI=ffffffff813782f8 RDI=ffff88806cf09a78 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000244d5 R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09ab9 R15=ffff88806cf09a78 RIP=ffffffff81130719 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 00007fa658f89900 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=00007f818b641650 CR3=000000000d738000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=dc356dadcff099a000000000000ae988 XMM05=96a3de51483250f50000000000133ae8 XMM06=5a9d233068761c4a0000000000132980 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000