syzkaller login: [ 31.073712] BUG: Bad rss-counter state mm:00000000b7b581c4 type:MM_FILEPAGES val:33 [ 31.074985] BUG: Bad rss-counter state mm:00000000b7b581c4 type:MM_ANONPAGES val:22 [ 31.118607] ================================================================== [ 31.119804] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.120895] Read of size 8 at addr ffff88800ef99880 by task sshd/218 [ 31.121783] [ 31.122031] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.123026] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.124178] Call Trace: [ 31.124548] [ 31.124874] dump_stack_lvl+0x91/0xf0 [ 31.125434] print_report+0xcc/0x620 [ 31.125999] ? __virt_addr_valid+0x102/0x340 [ 31.126642] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.127359] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.128073] kasan_report+0xbe/0xf0 [ 31.128620] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.129340] vma_interval_tree_remove+0xc75/0xec0 [ 31.130036] vma_prepare+0xc54/0x11a0 [ 31.130590] __split_vma+0x5af/0x950 [ 31.131143] ? __pfx___split_vma+0x10/0x10 [ 31.131755] ? find_held_lock+0x2c/0x110 [ 31.132366] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.133026] ? lock_is_held_type+0x9f/0x120 [ 31.133653] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.134350] ? mtree_range_walk+0x632/0x900 [ 31.134981] ? mas_walk+0x5c7/0x7c0 [ 31.135527] do_vmi_munmap+0x1f1/0x2b0 [ 31.136118] mmap_region+0x1f9/0x2660 [ 31.136679] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.137272] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.138097] ? __pfx_lock_acquire+0x10/0x10 [ 31.138708] ? __pfx_mmap_region+0x10/0x10 [ 31.139319] ? security_mmap_addr+0x7d/0xa0 [ 31.139939] ? get_unmapped_area+0x1f5/0x3f0 [ 31.140583] do_mmap+0x854/0xf00 [ 31.141087] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.141662] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.142303] ksys_mmap_pgoff+0x3af/0x500 [ 31.142874] do_syscall_64+0x3f/0x90 [ 31.143427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.144216] RIP: 0033:0x7f108ed91d82 [ 31.144735] 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 [ 31.147150] RSP: 002b:00007ffebf9508a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.148198] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f108ed91d82 [ 31.149177] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f108e1cb000 [ 31.150146] RBP: 00007f108e1cb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.151126] R10: 0000000000000812 R11: 0000000000000206 R12: 00005635e5acdf70 [ 31.152122] R13: 00007ffebf9508c0 R14: 00007ffebf9508f0 R15: 00007ffebf950c50 [ 31.153119] [ 31.153456] [ 31.153706] Allocated by task 211: [ 31.154204] kasan_save_stack+0x22/0x50 [ 31.154795] kasan_set_track+0x25/0x30 [ 31.155370] __kasan_slab_alloc+0x59/0x70 [ 31.155985] kmem_cache_alloc+0x16b/0x370 [ 31.156593] vm_area_dup+0x20/0x160 [ 31.157119] __split_vma+0x170/0x950 [ 31.157659] split_vma+0xc6/0x110 [ 31.158170] mprotect_fixup+0x8d2/0xb30 [ 31.158745] do_mprotect_pkey+0x87e/0xd40 [ 31.159354] __x64_sys_mprotect+0x78/0xc0 [ 31.159966] do_syscall_64+0x3f/0x90 [ 31.160517] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.161232] [ 31.161478] Freed by task 211: [ 31.161921] kasan_save_stack+0x22/0x50 [ 31.162507] kasan_set_track+0x25/0x30 [ 31.163074] kasan_save_free_info+0x2b/0x50 [ 31.163683] __kasan_slab_free+0x10a/0x190 [ 31.164284] kmem_cache_free+0x10d/0x4d0 [ 31.164870] rcu_core+0x8c8/0x2860 [ 31.165395] __do_softirq+0x1b7/0x7d4 [ 31.165934] [ 31.166178] Last potentially related work creation: [ 31.166849] kasan_save_stack+0x22/0x50 [ 31.167432] __kasan_record_aux_stack+0x8e/0xa0 [ 31.168087] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.168830] remove_vma+0x139/0x170 [ 31.169326] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.169982] do_vmi_munmap+0x1f1/0x2b0 [ 31.170541] __vm_munmap+0x138/0x3a0 [ 31.171087] __x64_sys_munmap+0x59/0x80 [ 31.171669] do_syscall_64+0x3f/0x90 [ 31.172228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.172967] [ 31.173214] Second to last potentially related work creation: [ 31.174012] kasan_save_stack+0x22/0x50 [ 31.174590] __kasan_record_aux_stack+0x8e/0xa0 [ 31.175250] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.176003] remove_vma+0x139/0x170 [ 31.176530] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.177184] do_vmi_munmap+0x1f1/0x2b0 [ 31.177759] mmap_region+0x1f9/0x2660 [ 31.178312] do_mmap+0x854/0xf00 [ 31.178799] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.179344] ksys_mmap_pgoff+0x3af/0x500 [ 31.179911] do_syscall_64+0x3f/0x90 [ 31.180471] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.181184] [ 31.181428] The buggy address belongs to the object at ffff88800ef99828 [ 31.181428] which belongs to the cache vm_area_struct of size 168 [ 31.183122] The buggy address is located 88 bytes inside of [ 31.183122] freed 168-byte region [ffff88800ef99828, ffff88800ef998d0) [ 31.184763] [ 31.185012] The buggy address belongs to the physical page: [ 31.185783] page:00000000ec42119a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef99 [ 31.187039] memcg:ffff88800f2e0801 [ 31.187532] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.188300] page_type: 0xffffffff() [ 31.188826] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 31.189888] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2e0801 [ 31.190937] page dumped because: kasan: bad access detected [ 31.191720] [ 31.192003] Memory state around the buggy address: [ 31.192667] ffff88800ef99780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.193607] ffff88800ef99800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.194556] >ffff88800ef99880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.195499] ^ [ 31.195956] ffff88800ef99900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.196909] ffff88800ef99980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.197882] ================================================================== [ 31.199064] Disabling lock debugging due to kernel taint [ 33.252586] BUG: Bad rss-counter state mm:0000000067649b88 type:MM_FILEPAGES val:33 [ 33.254172] BUG: Bad rss-counter state mm:0000000067649b88 type:MM_ANONPAGES val:22 [ 33.740093] BUG: Bad rss-counter state mm:0000000066236fef type:MM_FILEPAGES val:33 [ 33.741200] BUG: Bad rss-counter state mm:0000000066236fef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53815' (ECDSA) to the list of known hosts. 2023/06/20 07:11:59 fuzzer started 2023/06/20 07:11:59 dialing manager at localhost:44161 2023/06/20 07:11:59 checking machine... 2023/06/20 07:11:59 checking revisions... [ 34.495692] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:12:00 testing simple program... [ 34.546574] cgroup: Unknown subsys name 'net' [ 34.603528] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:11:58 Registers: info registers vcpu 0 RAX=ffffffff8613751a RBX=0000000000000001 RCX=ffffffff8180c521 RDX=0000000000000000 RSI=ffffffff86137508 RDI=ffffffff85dfc9fc RBP=ffff88800e77f920 RSP=ffff88800e77f858 R8 =ffffffff86137508 R9 =ffff88800e77f908 R10=0000000000038001 R11=0000000000020d8a R12=ffff88800e77f928 R13=ffff88800e77f910 R14=ffff88800e77f909 R15=ffff88800e77f8c8 RIP=ffffffff81130881 RFL=00000282 [--S----] 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 00007f94c28c0900 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=00007ffd75f04000 CR3=0000000019a72000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fa3ab147790 CR3=000000000ca5e000 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=e0a7442863163f884949ab30846a2186 XMM02=ec2efd57dc4c00df000000000011cdb0 XMM03=4d57bd2052c51735000000000011ce80 XMM04=9da895229c6bbc4500000000000ae988 XMM05=a6ad173be1438b9d0000000000135348 XMM06=806171799158d96700000000001349d0 XMM07=e042d86d42eb936e0000000000123f80 XMM08=4d57bd2052c51735000000000011ce80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000