syzkaller login: [ 82.866600] BUG: Bad rss-counter state mm:0000000049ad3844 type:MM_FILEPAGES val:31 [ 82.867868] BUG: Bad rss-counter state mm:0000000049ad3844 type:MM_ANONPAGES val:22 [ 82.911685] ================================================================== [ 82.912610] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 82.913639] Read of size 8 at addr ffff88800efa3880 by task sshd/219 [ 82.914420] [ 82.914638] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 82.915791] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 82.916808] Call Trace: [ 82.917146] [ 82.917437] dump_stack_lvl+0x91/0xf0 [ 82.917931] print_report+0xcc/0x620 [ 82.918421] ? __virt_addr_valid+0x102/0x340 [ 82.918983] ? vma_interval_tree_remove+0xc75/0xec0 [ 82.919610] ? vma_interval_tree_remove+0xc75/0xec0 [ 82.920234] kasan_report+0xbe/0xf0 [ 82.920729] ? vma_interval_tree_remove+0xc75/0xec0 [ 82.921360] vma_interval_tree_remove+0xc75/0xec0 [ 82.921976] vma_prepare+0xc54/0x11a0 [ 82.922461] __split_vma+0x5af/0x950 [ 82.922938] ? __pfx___split_vma+0x10/0x10 [ 82.923467] ? find_held_lock+0x2c/0x110 [ 82.923989] do_vmi_align_munmap+0x2ba/0x11f0 [ 82.924567] ? lock_is_held_type+0x9f/0x120 [ 82.925101] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 82.925705] ? mtree_range_walk+0x632/0x900 [ 82.926254] ? mas_walk+0x5c7/0x7c0 [ 82.926729] do_vmi_munmap+0x1f1/0x2b0 [ 82.927224] mmap_region+0x1f9/0x2660 [ 82.927709] ? vm_mmap_pgoff+0x15c/0x3a0 [ 82.928218] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 82.928968] ? __pfx_lock_acquire+0x10/0x10 [ 82.929513] ? __pfx_mmap_region+0x10/0x10 [ 82.930048] ? security_mmap_addr+0x7d/0xa0 [ 82.930581] ? get_unmapped_area+0x1f5/0x3f0 [ 82.931186] do_mmap+0x854/0xf00 [ 82.931674] vm_mmap_pgoff+0x1a6/0x3a0 [ 82.932232] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 82.932892] ksys_mmap_pgoff+0x3af/0x500 [ 82.933460] do_syscall_64+0x3f/0x90 [ 82.933990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 82.934703] RIP: 0033:0x7f7e506fbd82 [ 82.935211] 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 [ 82.937647] RSP: 002b:00007ffc0fc868c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 82.938672] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7e506fbd82 [ 82.939643] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7e4fb35000 [ 82.940609] RBP: 00007f7e4fb35000 R08: 0000000000000009 R09: 0000000000001000 [ 82.941471] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d1a7193b20 [ 82.942311] R13: 00007ffc0fc868e0 R14: 00007ffc0fc86910 R15: 00007ffc0fc86c70 [ 82.943172] [ 82.943480] [ 82.943699] Allocated by task 212: [ 82.944129] kasan_save_stack+0x22/0x50 [ 82.944644] kasan_set_track+0x25/0x30 [ 82.945133] __kasan_slab_alloc+0x59/0x70 [ 82.945663] kmem_cache_alloc+0x16b/0x370 [ 82.946188] vm_area_dup+0x20/0x160 [ 82.946645] __split_vma+0x170/0x950 [ 82.947114] split_vma+0xc6/0x110 [ 82.947564] mprotect_fixup+0x8d2/0xb30 [ 82.948065] do_mprotect_pkey+0x87e/0xd40 [ 82.948601] __x64_sys_mprotect+0x78/0xc0 [ 82.949114] do_syscall_64+0x3f/0x90 [ 82.949587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 82.950227] [ 82.950447] Freed by task 212: [ 82.950833] kasan_save_stack+0x22/0x50 [ 82.951334] kasan_set_track+0x25/0x30 [ 82.951828] kasan_save_free_info+0x2b/0x50 [ 82.952356] __kasan_slab_free+0x10a/0x190 [ 82.952897] kmem_cache_free+0x10d/0x4d0 [ 82.953409] rcu_core+0x8c8/0x2860 [ 82.953856] __do_softirq+0x1b7/0x7d4 [ 82.954332] [ 82.954545] Last potentially related work creation: [ 82.955140] kasan_save_stack+0x22/0x50 [ 82.955639] __kasan_record_aux_stack+0x8e/0xa0 [ 82.956212] __call_rcu_common.constprop.0+0x6a/0xb90 [ 82.956866] remove_vma+0x139/0x170 [ 82.957315] do_vmi_align_munmap+0xd4a/0x11f0 [ 82.957876] do_vmi_munmap+0x1f1/0x2b0 [ 82.958368] __vm_munmap+0x138/0x3a0 [ 82.958839] __x64_sys_munmap+0x59/0x80 [ 82.959335] do_syscall_64+0x3f/0x90 [ 82.959805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 82.960454] [ 82.960670] The buggy address belongs to the object at ffff88800efa3828 [ 82.960670] which belongs to the cache vm_area_struct of size 168 [ 82.962293] The buggy address is located 88 bytes inside of [ 82.962293] freed 168-byte region [ffff88800efa3828, ffff88800efa38d0) [ 82.963851] [ 82.964091] The buggy address belongs to the physical page: [ 82.964835] page:00000000cf858c02 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefa3 [ 82.966024] memcg:ffff88800e93ce01 [ 82.966495] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 82.967274] page_type: 0xffffffff() [ 82.967774] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 82.968808] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e93ce01 [ 82.969814] page dumped because: kasan: bad access detected [ 82.970587] [ 82.970834] Memory state around the buggy address: [ 82.971503] ffff88800efa3780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 82.972497] ffff88800efa3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 82.973487] >ffff88800efa3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 82.974476] ^ [ 82.974945] ffff88800efa3900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 82.975935] ffff88800efa3980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 82.976940] ================================================================== [ 82.978642] Disabling lock debugging due to kernel taint [ 84.913890] BUG: Bad rss-counter state mm:000000008249c1ea type:MM_FILEPAGES val:33 [ 84.915078] BUG: Bad rss-counter state mm:000000008249c1ea type:MM_ANONPAGES val:22 [ 85.392669] BUG: Bad rss-counter state mm:00000000c513e2bb type:MM_FILEPAGES val:33 [ 85.393674] BUG: Bad rss-counter state mm:00000000c513e2bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35507' (ECDSA) to the list of known hosts. 2023/06/20 00:58:02 fuzzer started 2023/06/20 00:58:02 dialing manager at localhost:44161 2023/06/20 00:58:03 checking machine... 2023/06/20 00:58:03 checking revisions... [ 86.328956] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:58:03 testing simple program... [ 86.380001] cgroup: Unknown subsys name 'net' [ 86.428631] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:57:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11001eb9fac RCX=0000000000000000 RDX=ffff88800fbe8000 RSI=ffffffff81717c88 RDI=ffff88800f5cfe00 RBP=ffff888019e3a740 RSP=ffff88800f5cfd40 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00007fff370963bc R13=dffffc0000000000 R14=0000000000001255 R15=0000000000000040 RIP=ffffffff81717c9c 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4f6b264900 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=00007fff370963bc CR3=000000000f55e000 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=00000000000000000000000000000000 XMM02=2ee20008b50ba0d0f9141ee45eb1f032 XMM03=a876e309a8e3f36b43948821fdff22b2 XMM04=ec3cd3b622e46f6b2f2a6e86c3e4cd65 XMM05=0000ff00000000000000000000000000 XMM06=a83cd30922e36f6b2f2a6e21c3e42265 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=00000000000d0002 RSI=0000000000000004 RDI=ffff88800c587640 RBP=ffff88800c587780 RSP=ffff88800c5876d0 R8 =0000000000000001 R9 =ffff88800844f780 R10=0000000000000003 R11=ffff88801a64cd10 R12=ffffea0000699300 R13=ffffea00003d3d00 R14=ffff88800844f780 R15=0000000000000000 RIP=ffffffff818067f5 RFL=00000082 [--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 00007f4242433900 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=00007ffc33bb2748 CR3=000000000cd42000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000