syzkaller login: [ 36.038671] BUG: Bad rss-counter state mm:000000009640c695 type:MM_FILEPAGES val:33 [ 36.040333] BUG: Bad rss-counter state mm:000000009640c695 type:MM_ANONPAGES val:22 [ 36.205471] ================================================================== [ 36.206545] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.207800] Read of size 8 at addr ffff88800e833140 by task sshd/220 [ 36.208720] [ 36.208981] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.210058] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.211033] Call Trace: [ 36.211350] [ 36.211633] dump_stack_lvl+0x91/0xf0 [ 36.212122] print_report+0xcc/0x620 [ 36.212608] ? __virt_addr_valid+0x102/0x340 [ 36.213175] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.213803] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.214418] kasan_report+0xbe/0xf0 [ 36.214890] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.215511] vma_interval_tree_remove+0xc75/0xec0 [ 36.216110] vma_prepare+0xc54/0x11a0 [ 36.216593] __split_vma+0x5af/0x950 [ 36.217074] ? __pfx___split_vma+0x10/0x10 [ 36.217619] ? find_held_lock+0x2c/0x110 [ 36.218154] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.218727] ? lock_is_held_type+0x9f/0x120 [ 36.219267] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.219893] ? mtree_range_walk+0x632/0x900 [ 36.220454] ? mas_walk+0x5c7/0x7c0 [ 36.220930] do_vmi_munmap+0x1f1/0x2b0 [ 36.221438] mmap_region+0x1f9/0x2660 [ 36.221926] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.222436] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.223164] ? __pfx_lock_acquire+0x10/0x10 [ 36.223705] ? __pfx_mmap_region+0x10/0x10 [ 36.224247] ? security_mmap_addr+0x7d/0xa0 [ 36.224779] ? get_unmapped_area+0x1f5/0x3f0 [ 36.225336] do_mmap+0x854/0xf00 [ 36.225772] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.226269] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.226840] ksys_mmap_pgoff+0x3af/0x500 [ 36.227344] do_syscall_64+0x3f/0x90 [ 36.227825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.228477] RIP: 0033:0x7f60d2b22d82 [ 36.228935] 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 [ 36.231095] RSP: 002b:00007ffef231e258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.231995] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f60d2b22d82 [ 36.232849] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f60d1f5c000 [ 36.233721] RBP: 00007f60d1f5c000 R08: 0000000000000009 R09: 0000000000001000 [ 36.234586] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558dd8417f70 [ 36.235440] R13: 00007ffef231e270 R14: 00007ffef231e2a0 R15: 00007ffef231e600 [ 36.236296] [ 36.236590] [ 36.236804] Allocated by task 213: [ 36.237249] kasan_save_stack+0x22/0x50 [ 36.237753] kasan_set_track+0x25/0x30 [ 36.238260] __kasan_slab_alloc+0x59/0x70 [ 36.238790] kmem_cache_alloc+0x16b/0x370 [ 36.239315] vm_area_dup+0x20/0x160 [ 36.239771] __split_vma+0x170/0x950 [ 36.240245] split_vma+0xc6/0x110 [ 36.240689] mprotect_fixup+0x8d2/0xb30 [ 36.241209] do_mprotect_pkey+0x87e/0xd40 [ 36.241736] __x64_sys_mprotect+0x78/0xc0 [ 36.242259] do_syscall_64+0x3f/0x90 [ 36.242732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.243373] [ 36.243586] Freed by task 213: [ 36.243979] kasan_save_stack+0x22/0x50 [ 36.244487] kasan_set_track+0x25/0x30 [ 36.244987] kasan_save_free_info+0x2b/0x50 [ 36.245531] __kasan_slab_free+0x10a/0x190 [ 36.246068] kmem_cache_free+0x10d/0x4d0 [ 36.246581] rcu_core+0x8c8/0x2860 [ 36.247023] __do_softirq+0x1b7/0x7d4 [ 36.247499] [ 36.247718] Last potentially related work creation: [ 36.248345] kasan_save_stack+0x22/0x50 [ 36.248853] __kasan_record_aux_stack+0x8e/0xa0 [ 36.249434] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.250079] remove_vma+0x139/0x170 [ 36.250535] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.251092] do_vmi_munmap+0x1f1/0x2b0 [ 36.251584] __vm_munmap+0x138/0x3a0 [ 36.252057] __x64_sys_munmap+0x59/0x80 [ 36.252554] do_syscall_64+0x3f/0x90 [ 36.253028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.253683] [ 36.253905] Second to last potentially related work creation: [ 36.254593] kasan_save_stack+0x22/0x50 [ 36.255093] __kasan_record_aux_stack+0x8e/0xa0 [ 36.255661] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.256315] remove_vma+0x139/0x170 [ 36.256769] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.257348] do_vmi_munmap+0x1f1/0x2b0 [ 36.257835] mmap_region+0x1f9/0x2660 [ 36.258322] do_mmap+0x854/0xf00 [ 36.258753] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.259244] ksys_mmap_pgoff+0x3af/0x500 [ 36.259745] do_syscall_64+0x3f/0x90 [ 36.260219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.260860] [ 36.261073] The buggy address belongs to the object at ffff88800e8330e8 [ 36.261073] which belongs to the cache vm_area_struct of size 168 [ 36.262549] The buggy address is located 88 bytes inside of [ 36.262549] freed 168-byte region [ffff88800e8330e8, ffff88800e833190) [ 36.263978] [ 36.264194] The buggy address belongs to the physical page: [ 36.264856] page:000000003a7a45f1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe833 [ 36.265952] memcg:ffff88800dcc9e01 [ 36.266382] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.267081] page_type: 0xffffffff() [ 36.267534] raw: 0100000000000200 ffff88800879fc80 ffffea0000407a00 dead000000000005 [ 36.268456] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcc9e01 [ 36.269423] page dumped because: kasan: bad access detected [ 36.270086] [ 36.270304] Memory state around the buggy address: [ 36.270886] ffff88800e833000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.271755] ffff88800e833080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 36.272629] >ffff88800e833100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.273498] ^ [ 36.274145] ffff88800e833180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 36.275011] ffff88800e833200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 36.275860] ================================================================== [ 36.276860] Disabling lock debugging due to kernel taint [ 38.358846] BUG: Bad rss-counter state mm:00000000d5413269 type:MM_FILEPAGES val:33 [ 38.360131] BUG: Bad rss-counter state mm:00000000d5413269 type:MM_ANONPAGES val:22 [ 38.786485] BUG: Bad rss-counter state mm:00000000a16742c2 type:MM_FILEPAGES val:33 [ 38.787669] BUG: Bad rss-counter state mm:00000000a16742c2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51725' (ECDSA) to the list of known hosts. 2023/06/20 07:34:30 fuzzer started 2023/06/20 07:34:30 dialing manager at localhost:44161 2023/06/20 07:34:30 checking machine... 2023/06/20 07:34:30 checking revisions... [ 39.481748] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:34:30 testing simple program... [ 39.520554] cgroup: Unknown subsys name 'net' [ 39.566233] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:34:29 Registers: info registers vcpu 0 RAX=1ffffffff0c0ab9f RBX=ffffffff86055cf8 RCX=ffffffff8661f0c7 RDX=0000000000000000 RSI=ffffffff860723cc RDI=ffffffff85d793d4 RBP=ffffffff86055a04 RSP=ffff88806ce099c0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffffffff86055ff0 R13=ffffffff85d793d4 R14=ffffffff86055a00 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----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 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=00007fe5d7b8ef00 CR3=000000001972e000 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=2030333a34333a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a34333a3730203032 XMM08=00007fd35400ae400000007700000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff864a9909 RBX=0000000000000001 RCX=ffffffff864a9904 RDX=0000000000000000 RSI=1ffffffff0c95321 RDI=ffffffff86048ca4 RBP=ffff88801598ed30 RSP=ffff88801598ec68 R8 =ffffffff864a9904 R9 =ffff88801598ed18 R10=0000000000038001 R11=00000000000b3e34 R12=ffff88801598ed38 R13=ffff88801598ed20 R14=ffff88801598ed19 R15=ffff88801598ecd8 RIP=ffffffff81130a5b RFL=00000216 [----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 00007fce2fdbd900 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=00007fce2fd87008 CR3=0000000008dbc000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000