syzkaller login: [ 31.029684] BUG: Bad rss-counter state mm:0000000032a7021b type:MM_FILEPAGES val:33 [ 31.030636] BUG: Bad rss-counter state mm:0000000032a7021b type:MM_ANONPAGES val:22 [ 31.200987] ================================================================== [ 31.201846] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.202723] Read of size 8 at addr ffff88800c6a3df0 by task sshd/221 [ 31.203438] [ 31.203654] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.204569] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.205493] Call Trace: [ 31.205792] [ 31.206061] dump_stack_lvl+0x91/0xf0 [ 31.206526] print_report+0xcc/0x620 [ 31.206982] ? __virt_addr_valid+0x102/0x340 [ 31.207500] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.208105] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.208691] kasan_report+0xbe/0xf0 [ 31.209145] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.209722] vma_interval_tree_remove+0xc75/0xec0 [ 31.210292] vma_prepare+0xc54/0x11a0 [ 31.210745] __split_vma+0x5af/0x950 [ 31.211193] ? __pfx___split_vma+0x10/0x10 [ 31.211710] ? find_held_lock+0x2c/0x110 [ 31.212213] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.212776] ? lock_is_held_type+0x9f/0x120 [ 31.213314] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.213910] ? mtree_range_walk+0x632/0x900 [ 31.214459] ? mas_walk+0x5c7/0x7c0 [ 31.214926] do_vmi_munmap+0x1f1/0x2b0 [ 31.215415] mmap_region+0x1f9/0x2660 [ 31.215902] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.216414] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.217119] ? __pfx_lock_acquire+0x10/0x10 [ 31.217652] ? __pfx_mmap_region+0x10/0x10 [ 31.218176] ? security_mmap_addr+0x7d/0xa0 [ 31.218705] ? get_unmapped_area+0x1f5/0x3f0 [ 31.219248] do_mmap+0x854/0xf00 [ 31.219705] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.220207] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.220770] ksys_mmap_pgoff+0x3af/0x500 [ 31.221268] do_syscall_64+0x3f/0x90 [ 31.221744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.222387] RIP: 0033:0x7fb3567f7d82 [ 31.222845] 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 [ 31.224971] RSP: 002b:00007ffdcdd7d8e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.225887] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb3567f7d82 [ 31.226746] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb355c31000 [ 31.227603] RBP: 00007fb355c31000 R08: 0000000000000009 R09: 0000000000001000 [ 31.228455] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561d2a0c3f70 [ 31.229300] R13: 00007ffdcdd7d900 R14: 00007ffdcdd7d930 R15: 00007ffdcdd7dc90 [ 31.230157] [ 31.230444] [ 31.230661] Allocated by task 214: [ 31.231094] kasan_save_stack+0x22/0x50 [ 31.231614] kasan_set_track+0x25/0x30 [ 31.232111] __kasan_slab_alloc+0x59/0x70 [ 31.232642] kmem_cache_alloc+0x16b/0x370 [ 31.233157] vm_area_dup+0x20/0x160 [ 31.233606] __split_vma+0x170/0x950 [ 31.234076] split_vma+0xc6/0x110 [ 31.234523] mprotect_fixup+0x8d2/0xb30 [ 31.235024] do_mprotect_pkey+0x87e/0xd40 [ 31.235548] __x64_sys_mprotect+0x78/0xc0 [ 31.236086] do_syscall_64+0x3f/0x90 [ 31.236567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.237221] [ 31.237443] Freed by task 214: [ 31.237838] kasan_save_stack+0x22/0x50 [ 31.238345] kasan_set_track+0x25/0x30 [ 31.238843] kasan_save_free_info+0x2b/0x50 [ 31.239382] __kasan_slab_free+0x10a/0x190 [ 31.239929] kmem_cache_free+0x10d/0x4d0 [ 31.240438] rcu_core+0x8c8/0x2860 [ 31.240892] __do_softirq+0x1b7/0x7d4 [ 31.241373] [ 31.241588] Last potentially related work creation: [ 31.242172] kasan_save_stack+0x22/0x50 [ 31.242671] __kasan_record_aux_stack+0x8e/0xa0 [ 31.243232] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.243895] remove_vma+0x139/0x170 [ 31.244343] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.244908] do_vmi_munmap+0x1f1/0x2b0 [ 31.245398] __vm_munmap+0x138/0x3a0 [ 31.245865] __x64_sys_munmap+0x59/0x80 [ 31.246364] do_syscall_64+0x3f/0x90 [ 31.246836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.247485] [ 31.247725] The buggy address belongs to the object at ffff88800c6a3d98 [ 31.247725] which belongs to the cache vm_area_struct of size 168 [ 31.249207] The buggy address is located 88 bytes inside of [ 31.249207] freed 168-byte region [ffff88800c6a3d98, ffff88800c6a3e40) [ 31.250627] [ 31.250846] The buggy address belongs to the physical page: [ 31.251521] page:00000000c73d5643 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6a3 [ 31.252613] memcg:ffff888019574901 [ 31.253040] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.253740] page_type: 0xffffffff() [ 31.254196] raw: 0100000000000200 ffff8880087a0c80 ffffea000031a380 dead000000000003 [ 31.255111] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019574901 [ 31.256043] page dumped because: kasan: bad access detected [ 31.256712] [ 31.256927] Memory state around the buggy address: [ 31.257518] ffff88800c6a3c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.258377] ffff88800c6a3d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.259243] >ffff88800c6a3d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.260111] ^ [ 31.260920] ffff88800c6a3e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.261789] ffff88800c6a3e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.262641] ================================================================== [ 31.263724] Disabling lock debugging due to kernel taint [ 33.484568] BUG: Bad rss-counter state mm:0000000070a7f819 type:MM_FILEPAGES val:33 [ 33.485925] BUG: Bad rss-counter state mm:0000000070a7f819 type:MM_ANONPAGES val:22 [ 34.053029] BUG: Bad rss-counter state mm:000000006688e290 type:MM_FILEPAGES val:33 [ 34.054230] BUG: Bad rss-counter state mm:000000006688e290 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29902' (ECDSA) to the list of known hosts. 2023/06/20 11:29:18 fuzzer started 2023/06/20 11:29:18 dialing manager at localhost:36067 2023/06/20 11:29:18 checking machine... 2023/06/20 11:29:18 checking revisions... [ 34.671043] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:29:18 testing simple program... [ 34.717674] cgroup: Unknown subsys name 'net' [ 34.765751] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:29:17 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff84514288 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000baa4 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800f0e3410 RIP=ffffffff813ad47e RFL=00000286 [--S--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 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=00007fbe08c3d5b0 CR3=000000000cbf0000 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=2037313a39323a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a39323a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff8613961e RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86139622 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020ed2 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88800f107a50 R15=ffff88806cf09a98 RIP=ffffffff81130bd6 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 00007f4614fff900 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=00007ffe339dc000 CR3=000000000eb10000 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=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