syzkaller login: [ 30.968440] BUG: Bad rss-counter state mm:000000002e0f1112 type:MM_FILEPAGES val:33 [ 30.969633] BUG: Bad rss-counter state mm:000000002e0f1112 type:MM_ANONPAGES val:22 [ 31.124503] ================================================================== [ 31.125421] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.126365] Read of size 8 at addr ffff88800e499df0 by task sshd/219 [ 31.127131] [ 31.127352] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.128306] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.129351] Call Trace: [ 31.129676] [ 31.129971] dump_stack_lvl+0x91/0xf0 [ 31.130472] print_report+0xcc/0x620 [ 31.130962] ? __virt_addr_valid+0x102/0x340 [ 31.131533] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.132155] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.132796] kasan_report+0xbe/0xf0 [ 31.133297] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.133932] vma_interval_tree_remove+0xc75/0xec0 [ 31.134548] vma_prepare+0xc54/0x11a0 [ 31.135026] __split_vma+0x5af/0x950 [ 31.135494] ? __pfx___split_vma+0x10/0x10 [ 31.136038] ? find_held_lock+0x2c/0x110 [ 31.136570] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.137134] ? lock_is_held_type+0x9f/0x120 [ 31.137682] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.138303] ? mtree_range_walk+0x632/0x900 [ 31.138867] ? mas_walk+0x5c7/0x7c0 [ 31.139345] do_vmi_munmap+0x1f1/0x2b0 [ 31.139859] mmap_region+0x1f9/0x2660 [ 31.140357] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.140893] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.141617] ? __pfx_lock_acquire+0x10/0x10 [ 31.142154] ? __pfx_mmap_region+0x10/0x10 [ 31.142696] ? security_mmap_addr+0x7d/0xa0 [ 31.143229] ? get_unmapped_area+0x1f5/0x3f0 [ 31.143796] do_mmap+0x854/0xf00 [ 31.144242] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.144750] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.145317] ksys_mmap_pgoff+0x3af/0x500 [ 31.145840] do_syscall_64+0x3f/0x90 [ 31.146321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.146966] RIP: 0033:0x7f5d782abd82 [ 31.147422] 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 [ 31.149579] RSP: 002b:00007fffcbcc0658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.150493] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d782abd82 [ 31.151342] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d776e5000 [ 31.152202] RBP: 00007f5d776e5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.153073] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560e35896b20 [ 31.153927] R13: 00007fffcbcc0670 R14: 00007fffcbcc06a0 R15: 00007fffcbcc0a00 [ 31.154789] [ 31.155083] [ 31.155297] Allocated by task 212: [ 31.155726] kasan_save_stack+0x22/0x50 [ 31.156234] kasan_set_track+0x25/0x30 [ 31.156755] __kasan_slab_alloc+0x59/0x70 [ 31.157280] kmem_cache_alloc+0x16b/0x370 [ 31.157794] vm_area_dup+0x20/0x160 [ 31.158253] __split_vma+0x170/0x950 [ 31.158714] split_vma+0xc6/0x110 [ 31.159163] mprotect_fixup+0x8d2/0xb30 [ 31.159665] do_mprotect_pkey+0x87e/0xd40 [ 31.160189] __x64_sys_mprotect+0x78/0xc0 [ 31.160726] do_syscall_64+0x3f/0x90 [ 31.161203] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.161851] [ 31.162065] Freed by task 212: [ 31.162465] kasan_save_stack+0x22/0x50 [ 31.162972] kasan_set_track+0x25/0x30 [ 31.163466] kasan_save_free_info+0x2b/0x50 [ 31.163996] __kasan_slab_free+0x10a/0x190 [ 31.164563] kmem_cache_free+0x10d/0x4d0 [ 31.165072] rcu_core+0x8c8/0x2860 [ 31.165517] __do_softirq+0x1b7/0x7d4 [ 31.166001] [ 31.166215] Last potentially related work creation: [ 31.166813] kasan_save_stack+0x22/0x50 [ 31.167323] __kasan_record_aux_stack+0x8e/0xa0 [ 31.167896] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.168560] remove_vma+0x139/0x170 [ 31.169013] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.169570] do_vmi_munmap+0x1f1/0x2b0 [ 31.170061] __vm_munmap+0x138/0x3a0 [ 31.170530] __x64_sys_munmap+0x59/0x80 [ 31.171029] do_syscall_64+0x3f/0x90 [ 31.171506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.172148] [ 31.172369] The buggy address belongs to the object at ffff88800e499d98 [ 31.172369] which belongs to the cache vm_area_struct of size 168 [ 31.173856] The buggy address is located 88 bytes inside of [ 31.173856] freed 168-byte region [ffff88800e499d98, ffff88800e499e40) [ 31.175259] [ 31.175481] The buggy address belongs to the physical page: [ 31.176139] page:00000000a7c7ab71 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe499 [ 31.177234] memcg:ffff88800f2f4b01 [ 31.177669] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.178320] page_type: 0xffffffff() [ 31.178775] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.179694] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2f4b01 [ 31.180622] page dumped because: kasan: bad access detected [ 31.181294] [ 31.181516] Memory state around the buggy address: [ 31.182099] ffff88800e499c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.182959] ffff88800e499d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.183828] >ffff88800e499d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.184686] ^ [ 31.185506] ffff88800e499e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.186382] ffff88800e499e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.187245] ================================================================== [ 31.188582] Disabling lock debugging due to kernel taint [ 33.435614] BUG: Bad rss-counter state mm:0000000092b70913 type:MM_FILEPAGES val:33 [ 33.436829] BUG: Bad rss-counter state mm:0000000092b70913 type:MM_ANONPAGES val:22 [ 33.769154] BUG: Bad rss-counter state mm:000000004d800e8d type:MM_FILEPAGES val:33 [ 33.770239] BUG: Bad rss-counter state mm:000000004d800e8d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44623' (ECDSA) to the list of known hosts. 2023/06/21 07:01:32 fuzzer started 2023/06/21 07:01:32 dialing manager at localhost:36067 2023/06/21 07:01:32 checking machine... 2023/06/21 07:01:32 checking revisions... [ 34.501846] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:01:32 testing simple program... [ 34.548483] cgroup: Unknown subsys name 'net' [ 34.591980] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:01:32 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=1ffffffff0ba7c92 RDX=1ffffffff0ac2cf0 RSI=0000000000007679 RDI=ffff88806ce3a360 RBP=ffffffff85616740 RSP=ffff88806ce09db0 R8 =0000000000000000 R9 =ffffffff85616780 R10=ffffffff85d3d357 R11=0000000000000001 R12=ffff88806ce3a2c0 R13=ffff88806ce3a360 R14=ffff88806ce3a2d4 R15=0000000000000000 RIP=ffffffff81381414 RFL=00000046 [---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 00007f27e8536900 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=00007f27e8aee0b0 CR3=000000000f7aa000 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=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=00007ffc2c7c5738 CR3=0000000005482000 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=00007fe509d865100000561ff9962790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000