syzkaller login: [ 29.688164] BUG: Bad rss-counter state mm:00000000204dfbf0 type:MM_FILEPAGES val:33 [ 29.688768] BUG: Bad rss-counter state mm:00000000204dfbf0 type:MM_ANONPAGES val:22 [ 29.845687] ================================================================== [ 29.846651] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.847596] Read of size 8 at addr ffff8880164f76b0 by task sshd/222 [ 29.848564] [ 29.848785] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.849652] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.850683] Call Trace: [ 29.851005] [ 29.851287] dump_stack_lvl+0x91/0xf0 [ 29.851780] print_report+0xcc/0x620 [ 29.852265] ? __virt_addr_valid+0x102/0x340 [ 29.852826] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.853449] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.854082] kasan_report+0xbe/0xf0 [ 29.854565] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.855187] vma_interval_tree_remove+0xc75/0xec0 [ 29.855792] vma_prepare+0xc54/0x11a0 [ 29.856278] __split_vma+0x5af/0x950 [ 29.856753] ? __pfx___split_vma+0x10/0x10 [ 29.857289] ? find_held_lock+0x2c/0x110 [ 29.857838] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.858410] ? lock_is_held_type+0x9f/0x120 [ 29.858960] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.859580] ? mtree_range_walk+0x632/0x900 [ 29.860138] ? mas_walk+0x5c7/0x7c0 [ 29.860614] do_vmi_munmap+0x1f1/0x2b0 [ 29.861106] mmap_region+0x1f9/0x2660 [ 29.861591] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.862121] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.862837] ? __pfx_lock_acquire+0x10/0x10 [ 29.863382] ? __pfx_mmap_region+0x10/0x10 [ 29.863916] ? security_mmap_addr+0x7d/0xa0 [ 29.864455] ? get_unmapped_area+0x1f5/0x3f0 [ 29.865011] do_mmap+0x854/0xf00 [ 29.865459] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.865977] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.866541] ksys_mmap_pgoff+0x3af/0x500 [ 29.867054] do_syscall_64+0x3f/0x90 [ 29.867537] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.868184] RIP: 0033:0x7fc32d6e5d82 [ 29.868645] 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 [ 29.870791] RSP: 002b:00007ffea4f18218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.871701] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc32d6e5d82 [ 29.872562] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc32cb1f000 [ 29.873413] RBP: 00007fc32cb1f000 R08: 0000000000000009 R09: 0000000000001000 [ 29.874277] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563f271bdec0 [ 29.875130] R13: 00007ffea4f18230 R14: 00007ffea4f18260 R15: 00007ffea4f185c0 [ 29.875997] [ 29.876289] [ 29.876504] Allocated by task 215: [ 29.876937] kasan_save_stack+0x22/0x50 [ 29.877449] kasan_set_track+0x25/0x30 [ 29.877953] __kasan_slab_alloc+0x59/0x70 [ 29.878486] kmem_cache_alloc+0x16b/0x370 [ 29.879000] vm_area_dup+0x20/0x160 [ 29.879466] __split_vma+0x170/0x950 [ 29.879937] split_vma+0xc6/0x110 [ 29.880380] mprotect_fixup+0x8d2/0xb30 [ 29.880881] do_mprotect_pkey+0x87e/0xd40 [ 29.881405] __x64_sys_mprotect+0x78/0xc0 [ 29.881936] do_syscall_64+0x3f/0x90 [ 29.882415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.883057] [ 29.883271] Freed by task 211: [ 29.883664] kasan_save_stack+0x22/0x50 [ 29.884179] kasan_set_track+0x25/0x30 [ 29.884674] kasan_save_free_info+0x2b/0x50 [ 29.885211] __kasan_slab_free+0x10a/0x190 [ 29.885764] kmem_cache_free+0x10d/0x4d0 [ 29.886275] rcu_core+0x8c8/0x2860 [ 29.886717] __do_softirq+0x1b7/0x7d4 [ 29.887190] [ 29.887407] Last potentially related work creation: [ 29.888001] kasan_save_stack+0x22/0x50 [ 29.888508] __kasan_record_aux_stack+0x8e/0xa0 [ 29.889078] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.889812] remove_vma+0x139/0x170 [ 29.890276] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.890869] do_vmi_munmap+0x1f1/0x2b0 [ 29.891378] __vm_munmap+0x138/0x3a0 [ 29.891873] __x64_sys_munmap+0x59/0x80 [ 29.892405] do_syscall_64+0x3f/0x90 [ 29.892904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.893574] [ 29.893818] Second to last potentially related work creation: [ 29.894550] kasan_save_stack+0x22/0x50 [ 29.895086] __kasan_record_aux_stack+0x8e/0xa0 [ 29.895698] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.896380] remove_vma+0x139/0x170 [ 29.896851] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.897452] do_vmi_munmap+0x1f1/0x2b0 [ 29.897978] mmap_region+0x1f9/0x2660 [ 29.898486] do_mmap+0x854/0xf00 [ 29.898933] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.899452] ksys_mmap_pgoff+0x3af/0x500 [ 29.899980] do_syscall_64+0x3f/0x90 [ 29.900471] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.901144] [ 29.901373] The buggy address belongs to the object at ffff8880164f7658 [ 29.901373] which belongs to the cache vm_area_struct of size 168 [ 29.902952] The buggy address is located 88 bytes inside of [ 29.902952] freed 168-byte region [ffff8880164f7658, ffff8880164f7700) [ 29.904452] [ 29.904681] The buggy address belongs to the physical page: [ 29.905379] page:000000004edf95f4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x164f7 [ 29.906519] memcg:ffff88800df1d501 [ 29.906966] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.907698] page_type: 0xffffffff() [ 29.908176] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 29.909156] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df1d501 [ 29.910134] page dumped because: kasan: bad access detected [ 29.910836] [ 29.911067] Memory state around the buggy address: [ 29.911673] ffff8880164f7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.912583] ffff8880164f7600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.913510] >ffff8880164f7680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.914423] ^ [ 29.915044] ffff8880164f7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.915959] ffff8880164f7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 29.916862] ================================================================== [ 29.917873] Disabling lock debugging due to kernel taint [ 31.911301] BUG: Bad rss-counter state mm:000000002477a20f type:MM_FILEPAGES val:33 [ 31.912726] BUG: Bad rss-counter state mm:000000002477a20f type:MM_ANONPAGES val:22 [ 32.390396] BUG: Bad rss-counter state mm:00000000fa9a7ab0 type:MM_FILEPAGES val:33 [ 32.391591] BUG: Bad rss-counter state mm:00000000fa9a7ab0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57153' (ECDSA) to the list of known hosts. 2023/06/20 06:38:07 fuzzer started 2023/06/20 06:38:07 dialing manager at localhost:44161 2023/06/20 06:38:07 checking machine... 2023/06/20 06:38:07 checking revisions... [ 32.995920] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:38:07 testing simple program... [ 33.044634] cgroup: Unknown subsys name 'net' [ 33.081135] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:38:06 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff810bd032 RDX=0000000000000bd0 RSI=0000000000000bd0 RDI=ffffffff864eab00 RBP=ffff888016e6f6d8 RSP=ffff888016e6f5c0 R8 =0000000000000000 R9 =ffff888016e6f6c0 R10=0000000000038001 R11=0000000000006097 R12=ffff888016e6f6e0 R13=ffff888016e6f6c8 R14=ffff888016e6f6c1 R15=ffff888016e6f680 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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 00007f6d97453900 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=00007ffc0da43000 CR3=000000000d62c000 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=ffff888008c58400 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=00007fa9ade35760 CR3=000000000efd0000 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=8531ce33fad65ba4ef4c79c00b77822f XMM02=ec2efd57dc4c00df000000000011f920 XMM03=da43c926e1ca359f000000000011f9f0 XMM04=3aae3e1aac8efda300000000000ae988 XMM05=9a5df7c6b5e463040000000000135dc8 XMM06=00c3ffa147b8d8570000000000134e68 XMM07=e042d86d42eb936e00000000001243b0 XMM08=da43c926e1ca359f000000000011f9f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000