syzkaller login: [ 31.475802] BUG: Bad rss-counter state mm:00000000559c8de9 type:MM_FILEPAGES val:33 [ 31.477066] BUG: Bad rss-counter state mm:00000000559c8de9 type:MM_ANONPAGES val:22 [ 31.623338] ================================================================== [ 31.624289] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.625280] Read of size 8 at addr ffff88800e42cdf0 by task sshd/220 [ 31.626288] [ 31.626527] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.627421] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.628456] Call Trace: [ 31.628786] [ 31.629080] dump_stack_lvl+0x91/0xf0 [ 31.629592] print_report+0xcc/0x620 [ 31.630106] ? __virt_addr_valid+0x102/0x340 [ 31.630674] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.631305] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.631941] kasan_report+0xbe/0xf0 [ 31.632415] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.633029] vma_interval_tree_remove+0xc75/0xec0 [ 31.633656] vma_prepare+0xc54/0x11a0 [ 31.634131] __split_vma+0x5af/0x950 [ 31.634606] ? __pfx___split_vma+0x10/0x10 [ 31.635136] ? find_held_lock+0x2c/0x110 [ 31.635653] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.636215] ? lock_is_held_type+0x9f/0x120 [ 31.636803] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.637434] ? mtree_range_walk+0x632/0x900 [ 31.637998] ? mas_walk+0x5c7/0x7c0 [ 31.638496] do_vmi_munmap+0x1f1/0x2b0 [ 31.638986] mmap_region+0x1f9/0x2660 [ 31.639482] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.639999] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.640746] ? __pfx_lock_acquire+0x10/0x10 [ 31.641275] ? __pfx_mmap_region+0x10/0x10 [ 31.641864] ? security_mmap_addr+0x7d/0xa0 [ 31.642436] ? get_unmapped_area+0x1f5/0x3f0 [ 31.643009] do_mmap+0x854/0xf00 [ 31.643478] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.643995] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.644603] ksys_mmap_pgoff+0x3af/0x500 [ 31.645218] do_syscall_64+0x3f/0x90 [ 31.645906] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.646825] RIP: 0033:0x7f6a1e91fd82 [ 31.647469] 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 [ 31.650436] RSP: 002b:00007fff6a358fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.651629] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6a1e91fd82 [ 31.652506] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6a1dd59000 [ 31.653366] RBP: 00007f6a1dd59000 R08: 0000000000000009 R09: 0000000000001000 [ 31.654250] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bde6afdec0 [ 31.655121] R13: 00007fff6a358fd0 R14: 00007fff6a359000 R15: 00007fff6a359360 [ 31.656030] [ 31.656336] [ 31.656572] Allocated by task 213: [ 31.657013] kasan_save_stack+0x22/0x50 [ 31.657555] kasan_set_track+0x25/0x30 [ 31.658059] __kasan_slab_alloc+0x59/0x70 [ 31.658600] kmem_cache_alloc+0x16b/0x370 [ 31.659120] vm_area_dup+0x20/0x160 [ 31.659601] __split_vma+0x170/0x950 [ 31.660067] split_vma+0xc6/0x110 [ 31.660522] mprotect_fixup+0x8d2/0xb30 [ 31.661028] do_mprotect_pkey+0x87e/0xd40 [ 31.661569] __x64_sys_mprotect+0x78/0xc0 [ 31.662123] do_syscall_64+0x3f/0x90 [ 31.662617] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.663258] [ 31.663496] Freed by task 213: [ 31.663897] kasan_save_stack+0x22/0x50 [ 31.664417] kasan_set_track+0x25/0x30 [ 31.664913] kasan_save_free_info+0x2b/0x50 [ 31.665461] __kasan_slab_free+0x10a/0x190 [ 31.666012] kmem_cache_free+0x10d/0x4d0 [ 31.666557] rcu_core+0x8c8/0x2860 [ 31.666998] __do_softirq+0x1b7/0x7d4 [ 31.667500] [ 31.667720] Last potentially related work creation: [ 31.668301] kasan_save_stack+0x22/0x50 [ 31.668820] __kasan_record_aux_stack+0x8e/0xa0 [ 31.669407] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.670067] remove_vma+0x139/0x170 [ 31.670541] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.671100] do_vmi_munmap+0x1f1/0x2b0 [ 31.671611] __vm_munmap+0x138/0x3a0 [ 31.672078] __x64_sys_munmap+0x59/0x80 [ 31.672598] do_syscall_64+0x3f/0x90 [ 31.673071] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.673753] [ 31.673973] Second to last potentially related work creation: [ 31.674680] kasan_save_stack+0x22/0x50 [ 31.675183] __kasan_record_aux_stack+0x8e/0xa0 [ 31.675777] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.676444] remove_vma+0x139/0x170 [ 31.676902] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.677477] do_vmi_munmap+0x1f1/0x2b0 [ 31.677984] mmap_region+0x1f9/0x2660 [ 31.678475] do_mmap+0x854/0xf00 [ 31.678912] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.679418] ksys_mmap_pgoff+0x3af/0x500 [ 31.679921] do_syscall_64+0x3f/0x90 [ 31.680418] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.681064] [ 31.681278] The buggy address belongs to the object at ffff88800e42cd98 [ 31.681278] which belongs to the cache vm_area_struct of size 168 [ 31.682775] The buggy address is located 88 bytes inside of [ 31.682775] freed 168-byte region [ffff88800e42cd98, ffff88800e42ce40) [ 31.684207] [ 31.684446] The buggy address belongs to the physical page: [ 31.685108] page:000000002bfdc01e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe42c [ 31.686231] memcg:ffff88800c6a8301 [ 31.686680] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.687325] page_type: 0xffffffff() [ 31.687814] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ac080 dead000000000008 [ 31.688755] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6a8301 [ 31.689689] page dumped because: kasan: bad access detected [ 31.690355] [ 31.690578] Memory state around the buggy address: [ 31.691169] ffff88800e42cc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.692048] ffff88800e42cd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.692915] >ffff88800e42cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.693825] ^ [ 31.694672] ffff88800e42ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.695606] ffff88800e42ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.696694] ================================================================== [ 31.697971] Disabling lock debugging due to kernel taint [ 33.691538] BUG: Bad rss-counter state mm:00000000b7cd7737 type:MM_FILEPAGES val:33 [ 33.692728] BUG: Bad rss-counter state mm:00000000b7cd7737 type:MM_ANONPAGES val:22 [ 34.144864] BUG: Bad rss-counter state mm:000000006dfff74b type:MM_FILEPAGES val:33 [ 34.145859] BUG: Bad rss-counter state mm:000000006dfff74b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33401' (ECDSA) to the list of known hosts. 2023/06/20 13:38:25 fuzzer started 2023/06/20 13:38:25 dialing manager at localhost:36067 2023/06/20 13:38:25 checking machine... 2023/06/20 13:38:25 checking revisions... [ 34.864453] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:38:25 testing simple program... [ 34.905746] cgroup: Unknown subsys name 'net' [ 34.980910] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:38:25 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110038c3f26 RSI=ffffffff818c73ee RDI=ffff88801c61f930 RBP=ffff88801c61f9c8 RSP=ffff88801c61f908 R8 =0000000000000001 R9 =ffff88801c61f970 R10=0000000000038001 R11=0000000000020cbd R12=ffff88801c61f9f8 R13=0000000000000000 R14=ffff8880166651c0 R15=ffff88801c61f930 RIP=ffffffff811305f0 RFL=00000212 [----A--] 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 00007ff18bc66900 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=00007fff8bd47000 CR3=000000000e146000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f56e9f1a5b0 CR3=0000000013612000 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=f854b69353379abc5a495fee3b26196d XMM02=ec2efd57dc4c00df000000000011a850 XMM03=f41b9def02b971ab000000000011a920 XMM04=e9b9717083c88ddf00000000000ae988 XMM05=19e9129bd510f2350000000000133338 XMM06=035a03040c7aa3b000000000001321a0 XMM07=e042d86d42eb936e00000000001223e8 XMM08=f41b9def02b971ab000000000011a920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000