syzkaller login: [ 113.936448] BUG: Bad rss-counter state mm:000000007642eb77 type:MM_FILEPAGES val:33 [ 113.937729] BUG: Bad rss-counter state mm:000000007642eb77 type:MM_ANONPAGES val:22 [ 114.106923] ================================================================== [ 114.107996] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 114.109134] Read of size 8 at addr ffff888019ea8798 by task sshd/221 [ 114.110171] [ 114.110408] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 114.111500] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 114.112576] Call Trace: [ 114.112917] [ 114.113231] dump_stack_lvl+0x91/0xf0 [ 114.113755] print_report+0xcc/0x620 [ 114.114264] ? __virt_addr_valid+0x102/0x340 [ 114.114856] ? vma_interval_tree_remove+0xc75/0xec0 [ 114.115518] ? vma_interval_tree_remove+0xc75/0xec0 [ 114.116180] kasan_report+0xbe/0xf0 [ 114.116689] ? vma_interval_tree_remove+0xc75/0xec0 [ 114.117372] vma_interval_tree_remove+0xc75/0xec0 [ 114.118020] vma_prepare+0xc54/0x11a0 [ 114.118536] __split_vma+0x5af/0x950 [ 114.119040] ? __pfx___split_vma+0x10/0x10 [ 114.119606] ? find_held_lock+0x2c/0x110 [ 114.120165] do_vmi_align_munmap+0x2ba/0x11f0 [ 114.120772] ? lock_is_held_type+0x9f/0x120 [ 114.121370] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 114.122017] ? mtree_range_walk+0x632/0x900 [ 114.122608] ? mas_walk+0x5c7/0x7c0 [ 114.123118] do_vmi_munmap+0x1f1/0x2b0 [ 114.123641] mmap_region+0x1f9/0x2660 [ 114.124153] ? vm_mmap_pgoff+0x15c/0x3a0 [ 114.124708] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 114.125480] ? __pfx_lock_acquire+0x10/0x10 [ 114.126054] ? __pfx_mmap_region+0x10/0x10 [ 114.126627] ? security_mmap_addr+0x7d/0xa0 [ 114.127194] ? get_unmapped_area+0x1f5/0x3f0 [ 114.127789] do_mmap+0x854/0xf00 [ 114.128260] vm_mmap_pgoff+0x1a6/0x3a0 [ 114.128793] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 114.129413] ksys_mmap_pgoff+0x3af/0x500 [ 114.129957] do_syscall_64+0x3f/0x90 [ 114.130473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 114.131167] RIP: 0033:0x7f8de4179d82 [ 114.131660] 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 [ 114.133944] RSP: 002b:00007ffeee6578b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 114.134918] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8de4179d82 [ 114.135821] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8de35b3000 [ 114.136727] RBP: 00007f8de35b3000 R08: 0000000000000009 R09: 0000000000001000 [ 114.137650] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558f321c7ec0 [ 114.138554] R13: 00007ffeee6578d0 R14: 00007ffeee657900 R15: 00007ffeee657c60 [ 114.139478] [ 114.139792] [ 114.140024] Allocated by task 214: [ 114.140483] kasan_save_stack+0x22/0x50 [ 114.141050] kasan_set_track+0x25/0x30 [ 114.141587] __kasan_slab_alloc+0x59/0x70 [ 114.142151] kmem_cache_alloc+0x16b/0x370 [ 114.142704] vm_area_dup+0x20/0x160 [ 114.143196] __split_vma+0x170/0x950 [ 114.143698] split_vma+0xc6/0x110 [ 114.144172] mprotect_fixup+0x8d2/0xb30 [ 114.144711] do_mprotect_pkey+0x87e/0xd40 [ 114.145300] __x64_sys_mprotect+0x78/0xc0 [ 114.145873] do_syscall_64+0x3f/0x90 [ 114.146389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 114.147072] [ 114.147306] Freed by task 214: [ 114.147729] kasan_save_stack+0x22/0x50 [ 114.148276] kasan_set_track+0x25/0x30 [ 114.148816] kasan_save_free_info+0x2b/0x50 [ 114.149392] __kasan_slab_free+0x10a/0x190 [ 114.149961] kmem_cache_free+0x10d/0x4d0 [ 114.150510] rcu_core+0x8c8/0x2860 [ 114.151074] __do_softirq+0x1b7/0x7d4 [ 114.151591] [ 114.151828] Last potentially related work creation: [ 114.152457] kasan_save_stack+0x22/0x50 [ 114.153002] __kasan_record_aux_stack+0x8e/0xa0 [ 114.153643] __call_rcu_common.constprop.0+0x6a/0xb90 [ 114.154338] remove_vma+0x139/0x170 [ 114.154848] do_vmi_align_munmap+0xd4a/0x11f0 [ 114.155461] do_vmi_munmap+0x1f1/0x2b0 [ 114.156006] __vm_munmap+0x138/0x3a0 [ 114.156521] __x64_sys_munmap+0x59/0x80 [ 114.157096] do_syscall_64+0x3f/0x90 [ 114.157613] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 114.158307] [ 114.158541] The buggy address belongs to the object at ffff888019ea8740 [ 114.158541] which belongs to the cache vm_area_struct of size 168 [ 114.160123] The buggy address is located 88 bytes inside of [ 114.160123] freed 168-byte region [ffff888019ea8740, ffff888019ea87e8) [ 114.161660] [ 114.161895] The buggy address belongs to the physical page: [ 114.162603] page:0000000070cf211f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ea8 [ 114.163779] memcg:ffff88801032b501 [ 114.164239] flags: 0x100000000000200(slab|node=0|zone=1) [ 114.164936] page_type: 0xffffffff() [ 114.165433] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 114.166427] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801032b501 [ 114.167405] page dumped because: kasan: bad access detected [ 114.168111] [ 114.168345] Memory state around the buggy address: [ 114.168973] ffff888019ea8680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 114.169900] ffff888019ea8700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 114.170828] >ffff888019ea8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 114.171737] ^ [ 114.172267] ffff888019ea8800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 114.173195] ffff888019ea8880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 114.174115] ================================================================== [ 114.175110] Disabling lock debugging due to kernel taint [ 116.318690] BUG: Bad rss-counter state mm:000000007b9dcc2a type:MM_FILEPAGES val:33 [ 116.319570] BUG: Bad rss-counter state mm:000000007b9dcc2a type:MM_ANONPAGES val:22 [ 116.804439] BUG: Bad rss-counter state mm:00000000a3a9431f type:MM_FILEPAGES val:33 [ 116.805552] BUG: Bad rss-counter state mm:00000000a3a9431f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51097' (ECDSA) to the list of known hosts. 2023/06/19 20:09:55 fuzzer started 2023/06/19 20:09:56 dialing manager at localhost:44161 2023/06/19 20:09:56 checking machine... 2023/06/19 20:09:56 checking revisions... [ 117.431590] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:09:56 testing simple program... [ 117.475555] cgroup: Unknown subsys name 'net' [ 117.524531] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:08:32 Registers: info registers vcpu 0 RAX=1ffff11001eaa285 RBX=ffff88800f5513f8 RCX=ffffffff84530871 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800f551428 RBP=ffff8880199922f0 RSP=ffff8880146b7d18 R8 =0000000000000001 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=00000000000b6cb2 R12=dffffc0000000000 R13=ffff888019992d38 R14=ffffffff813782a8 R15=ffff88800e19c900 RIP=ffffffff81846362 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa039d01900 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=00007fa0391059b0 CR3=000000000c672000 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=3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d XMM01=0000000000000000646873733d4d4d4f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6c3092ad076ac72700000000000ae988 XMM05=811cbca8eeb665b7000000000013e0c8 XMM06=c291bd5c70af25b9000000000013d168 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801657f208 RCX=0000000000000001 RDX=1ffff11002cafe43 RSI=ffff88801657ff48 RDI=ffff88801657f218 RBP=ffff88801657ff48 RSP=ffff88801657f160 R8 =0000000000000001 R9 =ffff88801657f248 R10=0000000000038001 R11=00000000000b4fb9 R12=0000000000000008 R13=ffff888016578000 R14=ffff88801657ff48 R15=ffff88801657f208 RIP=ffffffff81130468 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fed9aa14900 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=00007ffeced95000 CR3=000000001bd4c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000