syzkaller login: [ 31.019756] BUG: Bad rss-counter state mm:0000000067bf0761 type:MM_FILEPAGES val:33 [ 31.020777] BUG: Bad rss-counter state mm:0000000067bf0761 type:MM_ANONPAGES val:22 [ 31.177781] ================================================================== [ 31.178855] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.179976] Read of size 8 at addr ffff8880158d5880 by task sshd/219 [ 31.181047] [ 31.181312] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.182347] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.183513] Call Trace: [ 31.183893] [ 31.184256] dump_stack_lvl+0x91/0xf0 [ 31.184756] print_report+0xcc/0x620 [ 31.185249] ? __virt_addr_valid+0x102/0x340 [ 31.185805] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.186433] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.187050] kasan_report+0xbe/0xf0 [ 31.187536] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.188165] vma_interval_tree_remove+0xc75/0xec0 [ 31.188772] vma_prepare+0xc54/0x11a0 [ 31.189261] __split_vma+0x5af/0x950 [ 31.189738] ? __pfx___split_vma+0x10/0x10 [ 31.190275] ? find_held_lock+0x2c/0x110 [ 31.190796] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.191368] ? lock_is_held_type+0x9f/0x120 [ 31.191911] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.192535] ? mtree_range_walk+0x632/0x900 [ 31.193094] ? mas_walk+0x5c7/0x7c0 [ 31.193577] do_vmi_munmap+0x1f1/0x2b0 [ 31.194072] mmap_region+0x1f9/0x2660 [ 31.194562] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.195081] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.195798] ? __pfx_lock_acquire+0x10/0x10 [ 31.196375] ? __pfx_mmap_region+0x10/0x10 [ 31.196903] ? security_mmap_addr+0x7d/0xa0 [ 31.197436] ? get_unmapped_area+0x1f5/0x3f0 [ 31.197985] do_mmap+0x854/0xf00 [ 31.198443] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.198936] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.199502] ksys_mmap_pgoff+0x3af/0x500 [ 31.200014] do_syscall_64+0x3f/0x90 [ 31.200512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.201163] RIP: 0033:0x7fa64e7ddd82 [ 31.201618] 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 [ 31.203734] RSP: 002b:00007ffeda0b2818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.204643] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa64e7ddd82 [ 31.205489] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa64dc17000 [ 31.206332] RBP: 00007fa64dc17000 R08: 0000000000000009 R09: 0000000000001000 [ 31.207173] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a174718ec0 [ 31.208012] R13: 00007ffeda0b2830 R14: 00007ffeda0b2860 R15: 00007ffeda0b2bc0 [ 31.208893] [ 31.209190] [ 31.209412] Allocated by task 212: [ 31.209841] kasan_save_stack+0x22/0x50 [ 31.210354] kasan_set_track+0x25/0x30 [ 31.210857] __kasan_slab_alloc+0x59/0x70 [ 31.211386] kmem_cache_alloc+0x16b/0x370 [ 31.211905] vm_area_dup+0x20/0x160 [ 31.212366] __split_vma+0x170/0x950 [ 31.212834] split_vma+0xc6/0x110 [ 31.213286] mprotect_fixup+0x8d2/0xb30 [ 31.213799] do_mprotect_pkey+0x87e/0xd40 [ 31.214327] __x64_sys_mprotect+0x78/0xc0 [ 31.214860] do_syscall_64+0x3f/0x90 [ 31.215338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.215986] [ 31.216207] Freed by task 212: [ 31.216618] kasan_save_stack+0x22/0x50 [ 31.217146] kasan_set_track+0x25/0x30 [ 31.217676] kasan_save_free_info+0x2b/0x50 [ 31.218247] __kasan_slab_free+0x10a/0x190 [ 31.218825] kmem_cache_free+0x10d/0x4d0 [ 31.219368] rcu_core+0x8c8/0x2860 [ 31.219836] __do_softirq+0x1b7/0x7d4 [ 31.220360] [ 31.220591] Last potentially related work creation: [ 31.221248] kasan_save_stack+0x22/0x50 [ 31.221886] __kasan_record_aux_stack+0x8e/0xa0 [ 31.222505] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.223190] remove_vma+0x139/0x170 [ 31.223669] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.224260] do_vmi_munmap+0x1f1/0x2b0 [ 31.224774] __vm_munmap+0x138/0x3a0 [ 31.225283] __x64_sys_munmap+0x59/0x80 [ 31.225817] do_syscall_64+0x3f/0x90 [ 31.226329] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.227014] [ 31.227237] The buggy address belongs to the object at ffff8880158d5828 [ 31.227237] which belongs to the cache vm_area_struct of size 168 [ 31.228838] The buggy address is located 88 bytes inside of [ 31.228838] freed 168-byte region [ffff8880158d5828, ffff8880158d58d0) [ 31.230365] [ 31.230599] The buggy address belongs to the physical page: [ 31.231314] page:000000000ebf46a1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x158d5 [ 31.232506] memcg:ffff88800ebbe501 [ 31.232966] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.233704] page_type: 0xffffffff() [ 31.234186] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.235171] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebbe501 [ 31.236160] page dumped because: kasan: bad access detected [ 31.236871] [ 31.237100] Memory state around the buggy address: [ 31.237722] ffff8880158d5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.238647] ffff8880158d5800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.239564] >ffff8880158d5880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.240493] ^ [ 31.240933] ffff8880158d5900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.241859] ffff8880158d5980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.242770] ================================================================== [ 31.243776] Disabling lock debugging due to kernel taint [ 32.791307] BUG: Bad rss-counter state mm:00000000fc086886 type:MM_FILEPAGES val:33 [ 32.792059] BUG: Bad rss-counter state mm:00000000fc086886 type:MM_ANONPAGES val:22 [ 33.202040] BUG: Bad rss-counter state mm:00000000cbf2b6a7 type:MM_FILEPAGES val:33 [ 33.202794] BUG: Bad rss-counter state mm:00000000cbf2b6a7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2000' (ECDSA) to the list of known hosts. 2023/06/21 03:14:41 fuzzer started 2023/06/21 03:14:42 dialing manager at localhost:36067 2023/06/21 03:14:42 checking machine... 2023/06/21 03:14:42 checking revisions... [ 33.913321] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:14:42 testing simple program... [ 33.963737] cgroup: Unknown subsys name 'net' [ 34.006468] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:14:41 Registers: info registers vcpu 0 RAX=ffff88800d3a4848 RBX=ffff88800b37d680 RCX=0000000000000009 RDX=0000000000000d80 RSI=ffff88800d3a4800 RDI=ffff8880087b8780 RBP=ffff888008d9fd18 RSP=ffff888008d9fcf0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000128 R12=ffff8880087b8780 R13=ffffea00002cdf00 R14=ffffffff8186b835 R15=ffff88800e825b80 RIP=ffffffff81809df3 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=00007f362c172618 CR3=000000001a308000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007f1fbba09fe0 CR3=000000000f35c000 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=51c7f96ba31026bbee492670f4f9e1fb XMM02=ec2efd57dc4c00df000000000011d720 XMM03=f619c988fe96c05d000000000011d7f0 XMM04=7e149a65e41af34c00000000000ae988 XMM05=e4cb8bb95a7664b60000000000131c18 XMM06=60e6ed6da6111b790000000000130a80 XMM07=e042d86d42eb936e00000000001220d8 XMM08=f619c988fe96c05d000000000011d7f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000