syzkaller login: [ 30.474618] BUG: Bad rss-counter state mm:00000000bcd55772 type:MM_FILEPAGES val:33 [ 30.475732] BUG: Bad rss-counter state mm:00000000bcd55772 type:MM_ANONPAGES val:22 [ 30.632805] ================================================================== [ 30.633885] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.635039] Read of size 8 at addr ffff888009447df0 by task sshd/221 [ 30.636083] [ 30.636416] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.637461] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.638690] Call Trace: [ 30.639070] [ 30.639415] dump_stack_lvl+0x91/0xf0 [ 30.639910] print_report+0xcc/0x620 [ 30.640412] ? __virt_addr_valid+0x102/0x340 [ 30.640967] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.641603] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.642243] kasan_report+0xbe/0xf0 [ 30.642745] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.643393] vma_interval_tree_remove+0xc75/0xec0 [ 30.644003] vma_prepare+0xc54/0x11a0 [ 30.644516] __split_vma+0x5af/0x950 [ 30.644995] ? __pfx___split_vma+0x10/0x10 [ 30.645555] ? find_held_lock+0x2c/0x110 [ 30.646082] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.646689] ? lock_is_held_type+0x9f/0x120 [ 30.647248] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.647855] ? mtree_range_walk+0x632/0x900 [ 30.648425] ? mas_walk+0x5c7/0x7c0 [ 30.648905] do_vmi_munmap+0x1f1/0x2b0 [ 30.649431] mmap_region+0x1f9/0x2660 [ 30.649919] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.650450] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.651210] ? __pfx_lock_acquire+0x10/0x10 [ 30.651756] ? __pfx_mmap_region+0x10/0x10 [ 30.652304] ? security_mmap_addr+0x7d/0xa0 [ 30.652837] ? get_unmapped_area+0x1f5/0x3f0 [ 30.653417] do_mmap+0x854/0xf00 [ 30.653862] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.654379] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.654961] ksys_mmap_pgoff+0x3af/0x500 [ 30.655490] do_syscall_64+0x3f/0x90 [ 30.655971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.656633] RIP: 0033:0x7f88fa7f0d82 [ 30.657085] 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 [ 30.659274] RSP: 002b:00007ffd699fbd68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.660195] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f88fa7f0d82 [ 30.661061] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f88f9c2a000 [ 30.661943] RBP: 00007f88f9c2a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.662842] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556cadb8bec0 [ 30.663721] R13: 00007ffd699fbd80 R14: 00007ffd699fbdb0 R15: 00007ffd699fc110 [ 30.664592] [ 30.664884] [ 30.665102] Allocated by task 214: [ 30.665561] kasan_save_stack+0x22/0x50 [ 30.666084] kasan_set_track+0x25/0x30 [ 30.666614] __kasan_slab_alloc+0x59/0x70 [ 30.667132] kmem_cache_alloc+0x16b/0x370 [ 30.667672] vm_area_dup+0x20/0x160 [ 30.668125] __split_vma+0x170/0x950 [ 30.668599] split_vma+0xc6/0x110 [ 30.669049] mprotect_fixup+0x8d2/0xb30 [ 30.669576] do_mprotect_pkey+0x87e/0xd40 [ 30.670107] __x64_sys_mprotect+0x78/0xc0 [ 30.670661] do_syscall_64+0x3f/0x90 [ 30.671140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.671802] [ 30.672017] Freed by task 214: [ 30.672425] kasan_save_stack+0x22/0x50 [ 30.672929] kasan_set_track+0x25/0x30 [ 30.673451] kasan_save_free_info+0x2b/0x50 [ 30.673988] __kasan_slab_free+0x10a/0x190 [ 30.674558] kmem_cache_free+0x10d/0x4d0 [ 30.675080] rcu_core+0x8c8/0x2860 [ 30.675543] __do_softirq+0x1b7/0x7d4 [ 30.676027] [ 30.676260] Last potentially related work creation: [ 30.676844] kasan_save_stack+0x22/0x50 [ 30.677384] __kasan_record_aux_stack+0x8e/0xa0 [ 30.678049] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.678755] remove_vma+0x139/0x170 [ 30.679226] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.679785] do_vmi_munmap+0x1f1/0x2b0 [ 30.680281] __vm_munmap+0x138/0x3a0 [ 30.680747] __x64_sys_munmap+0x59/0x80 [ 30.681275] do_syscall_64+0x3f/0x90 [ 30.681755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.682414] [ 30.682643] Second to last potentially related work creation: [ 30.683349] kasan_save_stack+0x22/0x50 [ 30.683855] __kasan_record_aux_stack+0x8e/0xa0 [ 30.684441] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.685081] remove_vma+0x139/0x170 [ 30.685555] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.686118] do_vmi_munmap+0x1f1/0x2b0 [ 30.686630] mmap_region+0x1f9/0x2660 [ 30.687113] do_mmap+0x854/0xf00 [ 30.687568] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.688061] ksys_mmap_pgoff+0x3af/0x500 [ 30.688580] do_syscall_64+0x3f/0x90 [ 30.689060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.689726] [ 30.689945] The buggy address belongs to the object at ffff888009447d98 [ 30.689945] which belongs to the cache vm_area_struct of size 168 [ 30.691462] The buggy address is located 88 bytes inside of [ 30.691462] freed 168-byte region [ffff888009447d98, ffff888009447e40) [ 30.692883] [ 30.693099] The buggy address belongs to the physical page: [ 30.693782] page:00000000980239a4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9447 [ 30.694895] memcg:ffff88801003fe01 [ 30.695336] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.695978] page_type: 0xffffffff() [ 30.696437] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a78c0 dead000000000006 [ 30.697373] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801003fe01 [ 30.698284] page dumped because: kasan: bad access detected [ 30.698958] [ 30.699184] Memory state around the buggy address: [ 30.699769] ffff888009447c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.700646] ffff888009447d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.701524] >ffff888009447d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.702387] ^ [ 30.703214] ffff888009447e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.704062] ffff888009447e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.704923] ================================================================== [ 30.705998] Disabling lock debugging due to kernel taint [ 32.729780] BUG: Bad rss-counter state mm:0000000047238d5f type:MM_FILEPAGES val:33 [ 32.731141] BUG: Bad rss-counter state mm:0000000047238d5f type:MM_ANONPAGES val:22 [ 33.225973] BUG: Bad rss-counter state mm:00000000dcd446ba type:MM_FILEPAGES val:33 [ 33.227153] BUG: Bad rss-counter state mm:00000000dcd446ba type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2577' (ECDSA) to the list of known hosts. 2023/06/20 13:16:40 fuzzer started 2023/06/20 13:16:40 dialing manager at localhost:36067 2023/06/20 13:16:40 checking machine... 2023/06/20 13:16:40 checking revisions... [ 33.866688] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:16:40 testing simple program... [ 33.921786] cgroup: Unknown subsys name 'net' [ 33.964708] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:16:40 Registers: info registers vcpu 0 RAX=ffffffff8614e5ed RBX=0000000000000001 RCX=ffffffff8614e5e8 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888008ebf808 RSP=ffff888008ebf740 R8 =ffffffff8614e5ec R9 =ffff888008ebf7f0 R10=0000000000038001 R11=00000000000246c8 R12=ffff888008ebf810 R13=ffff888008ebf7f8 R14=ffff888008ebf7f1 R15=ffff888008ebf7b0 RIP=ffffffff81130ab5 RFL=00000297 [--S-APC] 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 00007f0161dc4900 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=00007f0162379650 CR3=000000001008c000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880147cf3c0 RCX=0000000000000001 RDX=1ffff110028f9e7a RSI=ffff8880147cfc20 RDI=ffff8880147cf3d0 RBP=ffff8880147cfc20 RSP=ffff8880147cf318 R8 =ffffffff863b30ba R9 =ffff8880147cf400 R10=0000000000038001 R11=000000000008a89d R12=0000000000000008 R13=ffff8880147c8000 R14=ffff8880147cfc28 R15=ffff8880147cf3c0 RIP=ffffffff81130468 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 00007f9025a0d900 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=00007f9024e7a710 CR3=000000000c7fa000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=a58ef631ee28eb1500000000000ae988 XMM05=e61ca5bcb0aa23c20000000000134680 XMM06=e4cb8bb95a7664b60000000000133518 XMM07=fb795ef6d657705600000000001223e8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000