syzkaller login: [ 30.132905] BUG: Bad rss-counter state mm:00000000b1558734 type:MM_FILEPAGES val:33 [ 30.134375] BUG: Bad rss-counter state mm:00000000b1558734 type:MM_ANONPAGES val:22 [ 30.293931] ================================================================== [ 30.294942] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.295985] Read of size 8 at addr ffff88800e6afdf0 by task sshd/219 [ 30.296969] [ 30.297211] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.298160] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.299261] Call Trace: [ 30.299612] [ 30.299926] dump_stack_lvl+0x91/0xf0 [ 30.300484] print_report+0xcc/0x620 [ 30.301003] ? __virt_addr_valid+0x102/0x340 [ 30.301595] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.302253] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.302914] kasan_report+0xbe/0xf0 [ 30.303429] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.304115] vma_interval_tree_remove+0xc75/0xec0 [ 30.304801] vma_prepare+0xc54/0x11a0 [ 30.305342] __split_vma+0x5af/0x950 [ 30.305873] ? __pfx___split_vma+0x10/0x10 [ 30.306485] ? find_held_lock+0x2c/0x110 [ 30.307070] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.307701] ? lock_is_held_type+0x9f/0x120 [ 30.308305] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.309013] ? mtree_range_walk+0x632/0x900 [ 30.309640] ? mas_walk+0x5c7/0x7c0 [ 30.310173] do_vmi_munmap+0x1f1/0x2b0 [ 30.310732] mmap_region+0x1f9/0x2660 [ 30.311281] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.311857] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.312679] ? __pfx_lock_acquire+0x10/0x10 [ 30.313284] ? __pfx_mmap_region+0x10/0x10 [ 30.313890] ? security_mmap_addr+0x7d/0xa0 [ 30.314494] ? get_unmapped_area+0x1f5/0x3f0 [ 30.315117] do_mmap+0x854/0xf00 [ 30.315619] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.316191] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.316860] ksys_mmap_pgoff+0x3af/0x500 [ 30.317443] do_syscall_64+0x3f/0x90 [ 30.317996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.318742] RIP: 0033:0x7f16a3bafd82 [ 30.319267] 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 [ 30.321736] RSP: 002b:00007ffc26208118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.322789] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f16a3bafd82 [ 30.323776] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f16a2fe9000 [ 30.324776] RBP: 00007f16a2fe9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.325760] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc4a9a3ec0 [ 30.326756] R13: 00007ffc26208130 R14: 00007ffc26208160 R15: 00007ffc262084c0 [ 30.327774] [ 30.328114] [ 30.328378] Allocated by task 212: [ 30.328905] kasan_save_stack+0x22/0x50 [ 30.329508] kasan_set_track+0x25/0x30 [ 30.330089] __kasan_slab_alloc+0x59/0x70 [ 30.330703] kmem_cache_alloc+0x16b/0x370 [ 30.331316] vm_area_dup+0x20/0x160 [ 30.331865] __split_vma+0x170/0x950 [ 30.332479] split_vma+0xc6/0x110 [ 30.333010] mprotect_fixup+0x8d2/0xb30 [ 30.333612] do_mprotect_pkey+0x87e/0xd40 [ 30.334245] __x64_sys_mprotect+0x78/0xc0 [ 30.334872] do_syscall_64+0x3f/0x90 [ 30.335446] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.336235] [ 30.336510] Freed by task 212: [ 30.336992] kasan_save_stack+0x22/0x50 [ 30.337600] kasan_set_track+0x25/0x30 [ 30.338208] kasan_save_free_info+0x2b/0x50 [ 30.338879] __kasan_slab_free+0x10a/0x190 [ 30.339532] kmem_cache_free+0x10d/0x4d0 [ 30.340151] rcu_core+0x8c8/0x2860 [ 30.340719] __do_softirq+0x1b7/0x7d4 [ 30.341319] [ 30.341586] Last potentially related work creation: [ 30.342313] kasan_save_stack+0x22/0x50 [ 30.342961] __kasan_record_aux_stack+0x8e/0xa0 [ 30.343682] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.344514] remove_vma+0x139/0x170 [ 30.345085] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.345785] do_vmi_munmap+0x1f1/0x2b0 [ 30.346407] __vm_munmap+0x138/0x3a0 [ 30.346999] __x64_sys_munmap+0x59/0x80 [ 30.347607] do_syscall_64+0x3f/0x90 [ 30.348104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.348793] [ 30.349019] The buggy address belongs to the object at ffff88800e6afd98 [ 30.349019] which belongs to the cache vm_area_struct of size 168 [ 30.350571] The buggy address is located 88 bytes inside of [ 30.350571] freed 168-byte region [ffff88800e6afd98, ffff88800e6afe40) [ 30.352070] [ 30.352299] The buggy address belongs to the physical page: [ 30.353002] page:00000000ebeb4970 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6af [ 30.354133] memcg:ffff88800c448a01 [ 30.354587] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.355271] page_type: 0xffffffff() [ 30.355744] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.356736] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c448a01 [ 30.357693] page dumped because: kasan: bad access detected [ 30.358394] [ 30.358617] Memory state around the buggy address: [ 30.359231] ffff88800e6afc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.360146] ffff88800e6afd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.361064] >ffff88800e6afd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.361978] ^ [ 30.362841] ffff88800e6afe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.363756] ffff88800e6afe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.364681] ================================================================== [ 30.365707] Disabling lock debugging due to kernel taint [ 32.901513] BUG: Bad rss-counter state mm:00000000c25e8f36 type:MM_FILEPAGES val:33 [ 32.902845] BUG: Bad rss-counter state mm:00000000c25e8f36 type:MM_ANONPAGES val:22 [ 33.465822] BUG: Bad rss-counter state mm:000000006bee0877 type:MM_FILEPAGES val:33 [ 33.467005] BUG: Bad rss-counter state mm:000000006bee0877 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45324' (ECDSA) to the list of known hosts. 2023/06/21 03:27:34 fuzzer started 2023/06/21 03:27:34 dialing manager at localhost:36067 2023/06/21 03:27:34 checking machine... 2023/06/21 03:27:34 checking revisions... [ 34.113450] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:27:34 testing simple program... [ 34.165405] cgroup: Unknown subsys name 'net' [ 34.229669] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:27:34 Registers: info registers vcpu 0 RAX=1ffffffff0c0a3e5 RBX=ffffffff86051f28 RCX=ffffffff84537da6 RDX=0000000000000000 RSI=ffffffff864b6d1e RDI=ffffffff86051f28 RBP=ffffffff86051f28 RSP=ffff888008d9f8a0 R8 =ffffffff864b6d1e R9 =ffff888008d9f998 R10=0000000000038001 R11=00000000000b5d59 R12=ffffffff86051f28 R13=ffffffff86051f28 R14=ffffffff86051f28 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 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=000055bb0a566c78 CR3=000000000d68e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0c8b975c4eb8a35300000000000ae988 XMM05=1319e678c5640f8a0000000000132538 XMM06=e8008b1642ea3e6000000000001324a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=00000000daacc417 RCX=ffff88806ca620b8 RDX=0000000000000007 RSI=ffffffff84537da7 RDI=0000000000000000 RBP=ffff8880087f81c0 RSP=ffff888008e37a48 R8 =0000000023c0916b R9 =ffff888008e379b8 R10=0000000000038001 R11=0000000000000128 R12=0000000000000001 R13=0000000000000000 R14=ffff888008e37ab0 R15=0000000000000007 RIP=ffffffff82270510 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 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=00007ffc47a23000 CR3=000000000f780000 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=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