syzkaller login: [ 30.655325] BUG: Bad rss-counter state mm:00000000e571c33a type:MM_FILEPAGES val:33 [ 30.657062] BUG: Bad rss-counter state mm:00000000e571c33a type:MM_ANONPAGES val:22 [ 30.822470] ================================================================== [ 30.823342] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.824346] Read of size 8 at addr ffff888017c6a4e0 by task sshd/219 [ 30.825090] [ 30.825313] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.826177] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.827131] Call Trace: [ 30.827445] [ 30.827721] dump_stack_lvl+0x91/0xf0 [ 30.828194] print_report+0xcc/0x620 [ 30.828663] ? __virt_addr_valid+0x102/0x340 [ 30.829202] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.829803] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.830395] kasan_report+0xbe/0xf0 [ 30.830856] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.831473] vma_interval_tree_remove+0xc75/0xec0 [ 30.832058] vma_prepare+0xc54/0x11a0 [ 30.832522] __split_vma+0x5af/0x950 [ 30.832986] ? __pfx___split_vma+0x10/0x10 [ 30.833527] ? find_held_lock+0x2c/0x110 [ 30.834051] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.834596] ? lock_is_held_type+0x9f/0x120 [ 30.835119] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.835726] ? mtree_range_walk+0x632/0x900 [ 30.836262] ? mas_walk+0x5c7/0x7c0 [ 30.836728] do_vmi_munmap+0x1f1/0x2b0 [ 30.837203] mmap_region+0x1f9/0x2660 [ 30.837673] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.838172] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.838862] ? __pfx_lock_acquire+0x10/0x10 [ 30.839398] ? __pfx_mmap_region+0x10/0x10 [ 30.839925] ? security_mmap_addr+0x7d/0xa0 [ 30.840470] ? get_unmapped_area+0x1f5/0x3f0 [ 30.841004] do_mmap+0x854/0xf00 [ 30.841428] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.841908] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.842452] ksys_mmap_pgoff+0x3af/0x500 [ 30.842945] do_syscall_64+0x3f/0x90 [ 30.843417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.844047] RIP: 0033:0x7f9ab3688d82 [ 30.844488] 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 [ 30.846553] RSP: 002b:00007ffed1691008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.847464] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ab3688d82 [ 30.848317] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ab2ac2000 [ 30.849136] RBP: 00007f9ab2ac2000 R08: 0000000000000009 R09: 0000000000001000 [ 30.849954] R10: 0000000000000812 R11: 0000000000000206 R12: 00005639121e8b20 [ 30.850769] R13: 00007ffed1691020 R14: 00007ffed1691050 R15: 00007ffed16913b0 [ 30.851607] [ 30.851890] [ 30.852106] Allocated by task 212: [ 30.852518] kasan_save_stack+0x22/0x50 [ 30.853011] kasan_set_track+0x25/0x30 [ 30.853487] __kasan_slab_alloc+0x59/0x70 [ 30.853997] kmem_cache_alloc+0x16b/0x370 [ 30.854498] vm_area_dup+0x20/0x160 [ 30.854963] __split_vma+0x170/0x950 [ 30.855441] split_vma+0xc6/0x110 [ 30.855874] mprotect_fixup+0x8d2/0xb30 [ 30.856364] do_mprotect_pkey+0x87e/0xd40 [ 30.856869] __x64_sys_mprotect+0x78/0xc0 [ 30.857376] do_syscall_64+0x3f/0x90 [ 30.857839] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.858469] [ 30.858680] Freed by task 209: [ 30.859059] kasan_save_stack+0x22/0x50 [ 30.859557] kasan_set_track+0x25/0x30 [ 30.860037] kasan_save_free_info+0x2b/0x50 [ 30.860554] __kasan_slab_free+0x10a/0x190 [ 30.861068] kmem_cache_free+0x10d/0x4d0 [ 30.861561] rcu_core+0x8c8/0x2860 [ 30.861990] __do_softirq+0x1b7/0x7d4 [ 30.862455] [ 30.862675] Last potentially related work creation: [ 30.863266] kasan_save_stack+0x22/0x50 [ 30.863758] __kasan_record_aux_stack+0x8e/0xa0 [ 30.864312] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.864948] remove_vma+0x139/0x170 [ 30.865379] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.865933] do_vmi_munmap+0x1f1/0x2b0 [ 30.866427] __vm_munmap+0x138/0x3a0 [ 30.866887] __x64_sys_munmap+0x59/0x80 [ 30.867401] do_syscall_64+0x3f/0x90 [ 30.867877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.868528] [ 30.868742] The buggy address belongs to the object at ffff888017c6a488 [ 30.868742] which belongs to the cache vm_area_struct of size 168 [ 30.870239] The buggy address is located 88 bytes inside of [ 30.870239] freed 168-byte region [ffff888017c6a488, ffff888017c6a530) [ 30.871678] [ 30.871897] The buggy address belongs to the physical page: [ 30.872659] page:000000000ae0b6d7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17c6a [ 30.873723] memcg:ffff88800fd5d501 [ 30.874147] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.874774] page_type: 0xffffffff() [ 30.875210] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.876112] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd5d501 [ 30.876987] page dumped because: kasan: bad access detected [ 30.877631] [ 30.877839] Memory state around the buggy address: [ 30.878406] ffff888017c6a380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.879264] ffff888017c6a400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.880112] >ffff888017c6a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.880931] ^ [ 30.881662] ffff888017c6a500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.882486] ffff888017c6a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.883311] ================================================================== [ 30.884291] Disabling lock debugging due to kernel taint [ 33.150340] BUG: Bad rss-counter state mm:0000000031610f78 type:MM_FILEPAGES val:33 [ 33.152113] BUG: Bad rss-counter state mm:0000000031610f78 type:MM_ANONPAGES val:22 [ 33.722765] BUG: Bad rss-counter state mm:0000000035c34099 type:MM_FILEPAGES val:33 [ 33.724013] BUG: Bad rss-counter state mm:0000000035c34099 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33245' (ECDSA) to the list of known hosts. 2023/06/20 13:20:24 fuzzer started 2023/06/20 13:20:24 dialing manager at localhost:36067 2023/06/20 13:20:24 checking machine... 2023/06/20 13:20:24 checking revisions... [ 34.365102] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:20:24 testing simple program... [ 34.417191] cgroup: Unknown subsys name 'net' [ 34.473516] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:20:24 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=000000003115854f RCX=ffffffff818dd832 RDX=ffff88800d628000 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff88800c5afc00 RSP=ffff88800c5afb60 R8 =0000000000000006 R9 =8000000000000000 R10=000000006491a797 R11=0000000000000001 R12=000000006491a797 R13=000000006491a797 R14=0000000000000001 R15=8000000000000000 RIP=ffffffff814c086b RFL=00000a16 [-O--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 00007f0259d4a900 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=00007f025a2ff650 CR3=000000000e8fa000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f9776ab5c40 CR3=000000000c7b6000 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=370144dbd1e1e4bd094f8f5b7c821647 XMM02=ec2efd57dc4c00df000000000011df88 XMM03=492f7ecb818d0bea000000000011e058 XMM04=62c62e64f98cc44900000000000ae988 XMM05=f8bd96e9119a762d0000000000133638 XMM06=806171799158d9670000000000132428 XMM07=fb795ef6d657705600000000001226c0 XMM08=2c67c8bc2e329bc3000000000011dff8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000