syzkaller login: [ 35.029766] BUG: Bad rss-counter state mm:0000000005a7ea0d type:MM_FILEPAGES val:33 [ 35.031224] BUG: Bad rss-counter state mm:0000000005a7ea0d type:MM_ANONPAGES val:22 [ 35.191779] ================================================================== [ 35.192681] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.193614] Read of size 8 at addr ffff88800c67bb38 by task sshd/219 [ 35.194479] [ 35.194698] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.195577] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.196557] Call Trace: [ 35.196873] [ 35.197156] dump_stack_lvl+0x91/0xf0 [ 35.197642] print_report+0xcc/0x620 [ 35.198121] ? __virt_addr_valid+0x102/0x340 [ 35.198667] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.199306] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.199928] kasan_report+0xbe/0xf0 [ 35.200403] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.201011] vma_interval_tree_remove+0xc75/0xec0 [ 35.201617] vma_prepare+0xc54/0x11a0 [ 35.202095] __split_vma+0x5af/0x950 [ 35.202565] ? __pfx___split_vma+0x10/0x10 [ 35.203106] ? find_held_lock+0x2c/0x110 [ 35.203630] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.204193] ? lock_is_held_type+0x9f/0x120 [ 35.204727] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.205330] ? mtree_range_walk+0x632/0x900 [ 35.205884] ? mas_walk+0x5c7/0x7c0 [ 35.206362] do_vmi_munmap+0x1f1/0x2b0 [ 35.206860] mmap_region+0x1f9/0x2660 [ 35.207344] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.207854] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.208563] ? __pfx_lock_acquire+0x10/0x10 [ 35.209097] ? __pfx_mmap_region+0x10/0x10 [ 35.209617] ? security_mmap_addr+0x7d/0xa0 [ 35.210149] ? get_unmapped_area+0x1f5/0x3f0 [ 35.210693] do_mmap+0x854/0xf00 [ 35.211149] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.211638] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.212200] ksys_mmap_pgoff+0x3af/0x500 [ 35.212700] do_syscall_64+0x3f/0x90 [ 35.213172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.213815] RIP: 0033:0x7f3fb3b58d82 [ 35.214272] 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 [ 35.216383] RSP: 002b:00007ffc0dd72b28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.217273] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3fb3b58d82 [ 35.218115] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3fb2f92000 [ 35.218969] RBP: 00007f3fb2f92000 R08: 0000000000000009 R09: 0000000000001000 [ 35.219825] R10: 0000000000000812 R11: 0000000000000206 R12: 00005572de7b0b20 [ 35.220678] R13: 00007ffc0dd72b40 R14: 00007ffc0dd72b70 R15: 00007ffc0dd72ed0 [ 35.221533] [ 35.221831] [ 35.222049] Allocated by task 212: [ 35.222476] kasan_save_stack+0x22/0x50 [ 35.223002] kasan_set_track+0x25/0x30 [ 35.223501] __kasan_slab_alloc+0x59/0x70 [ 35.224026] kmem_cache_alloc+0x16b/0x370 [ 35.224551] vm_area_dup+0x20/0x160 [ 35.225011] __split_vma+0x170/0x950 [ 35.225475] split_vma+0xc6/0x110 [ 35.225917] mprotect_fixup+0x8d2/0xb30 [ 35.226422] do_mprotect_pkey+0x87e/0xd40 [ 35.226950] __x64_sys_mprotect+0x78/0xc0 [ 35.227471] do_syscall_64+0x3f/0x90 [ 35.227939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.228580] [ 35.228796] Freed by task 13: [ 35.229184] kasan_save_stack+0x22/0x50 [ 35.229688] kasan_set_track+0x25/0x30 [ 35.230180] kasan_save_free_info+0x2b/0x50 [ 35.230713] __kasan_slab_free+0x10a/0x190 [ 35.231251] kmem_cache_free+0x10d/0x4d0 [ 35.231761] rcu_core+0x8c8/0x2860 [ 35.232203] __do_softirq+0x1b7/0x7d4 [ 35.232675] [ 35.232891] Last potentially related work creation: [ 35.233474] kasan_save_stack+0x22/0x50 [ 35.233979] __kasan_record_aux_stack+0x8e/0xa0 [ 35.234547] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.235200] remove_vma+0x139/0x170 [ 35.235651] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.236210] do_vmi_munmap+0x1f1/0x2b0 [ 35.236693] __vm_munmap+0x138/0x3a0 [ 35.237160] __x64_sys_munmap+0x59/0x80 [ 35.237651] do_syscall_64+0x3f/0x90 [ 35.238126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.238761] [ 35.238987] Second to last potentially related work creation: [ 35.239662] kasan_save_stack+0x22/0x50 [ 35.240159] __kasan_record_aux_stack+0x8e/0xa0 [ 35.240731] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.241368] remove_vma+0x139/0x170 [ 35.241825] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.242379] do_vmi_munmap+0x1f1/0x2b0 [ 35.242879] mmap_region+0x1f9/0x2660 [ 35.243354] do_mmap+0x854/0xf00 [ 35.243787] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.244272] ksys_mmap_pgoff+0x3af/0x500 [ 35.244769] do_syscall_64+0x3f/0x90 [ 35.245241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.245881] [ 35.246097] The buggy address belongs to the object at ffff88800c67bae0 [ 35.246097] which belongs to the cache vm_area_struct of size 168 [ 35.247556] The buggy address is located 88 bytes inside of [ 35.247556] freed 168-byte region [ffff88800c67bae0, ffff88800c67bb88) [ 35.248946] [ 35.249161] The buggy address belongs to the physical page: [ 35.249815] page:0000000027a4404f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc67b [ 35.250978] memcg:ffff88800e62c001 [ 35.251517] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.252312] page_type: 0xffffffff() [ 35.252873] raw: 0100000000000200 ffff8880087a0c80 ffffea000037bd80 000000000000000e [ 35.254011] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e62c001 [ 35.255166] page dumped because: kasan: bad access detected [ 35.255945] [ 35.256161] Memory state around the buggy address: [ 35.256731] ffff88800c67ba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.257572] ffff88800c67ba80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 35.258429] >ffff88800c67bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.259277] ^ [ 35.259884] ffff88800c67bb80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 35.260724] ffff88800c67bc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 35.261559] ================================================================== [ 35.262507] Disabling lock debugging due to kernel taint [ 37.034739] BUG: Bad rss-counter state mm:00000000bed7b835 type:MM_FILEPAGES val:33 [ 37.035709] BUG: Bad rss-counter state mm:00000000bed7b835 type:MM_ANONPAGES val:22 [ 37.521361] BUG: Bad rss-counter state mm:00000000c2faadcb type:MM_FILEPAGES val:33 [ 37.522479] BUG: Bad rss-counter state mm:00000000c2faadcb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27560' (ECDSA) to the list of known hosts. 2023/06/20 15:16:29 fuzzer started 2023/06/20 15:16:30 dialing manager at localhost:36067 2023/06/20 15:16:30 checking machine... 2023/06/20 15:16:30 checking revisions... [ 38.212742] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:16:30 testing simple program... [ 38.259997] cgroup: Unknown subsys name 'net' [ 38.317831] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:16:29 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f731d5bbdb0 CR3=000000000cb82000 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=e77ad9d341fdbba6ba480c80cdf291e1 XMM02=2c67c8bc2e329bc3000000000011a698 XMM03=fb795ef6d65770560000000000121460 XMM04=f6533e395f6c896600000000000ae988 XMM05=dfcdbad4f1609c3700000000001323c0 XMM06=806171799158d9670000000000132248 XMM07=e042d86d42eb936e00000000001216e0 XMM08=bec588ea6c28ce8c000000000011a6f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100193898f RBX=ffff88800c9c4c48 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800c9c4c78 RBP=ffff888019427248 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff8880194339c0 R14=ffffffff818d9c06 R15=ffff888009465c80 RIP=ffffffff818464ec 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 00007fa507c6d900 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=00007fa507c4c020 CR3=000000000e546000 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