syzkaller login: [ 31.013656] BUG: Bad rss-counter state mm:00000000c1752922 type:MM_FILEPAGES val:33 [ 31.015692] BUG: Bad rss-counter state mm:00000000c1752922 type:MM_ANONPAGES val:22 [ 31.150949] ================================================================== [ 31.152034] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.153151] Read of size 8 at addr ffff88800e6ee4e0 by task sshd/219 [ 31.154214] [ 31.154466] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.155135] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.155914] Call Trace: [ 31.156164] [ 31.156397] dump_stack_lvl+0x91/0xf0 [ 31.156788] print_report+0xcc/0x620 [ 31.157170] ? __virt_addr_valid+0x102/0x340 [ 31.157612] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.158102] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.158594] kasan_report+0xbe/0xf0 [ 31.158967] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.159457] vma_interval_tree_remove+0xc75/0xec0 [ 31.159933] vma_prepare+0xc54/0x11a0 [ 31.160322] __split_vma+0x5af/0x950 [ 31.160695] ? __pfx___split_vma+0x10/0x10 [ 31.161110] ? find_held_lock+0x2c/0x110 [ 31.161526] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.161973] ? lock_is_held_type+0x9f/0x120 [ 31.162401] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.162893] ? mtree_range_walk+0x632/0x900 [ 31.163334] ? mas_walk+0x5c7/0x7c0 [ 31.163712] do_vmi_munmap+0x1f1/0x2b0 [ 31.164104] mmap_region+0x1f9/0x2660 [ 31.164508] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.164908] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.165476] ? __pfx_lock_acquire+0x10/0x10 [ 31.165901] ? __pfx_mmap_region+0x10/0x10 [ 31.166322] ? security_mmap_addr+0x7d/0xa0 [ 31.166752] ? get_unmapped_area+0x1f5/0x3f0 [ 31.167195] do_mmap+0x854/0xf00 [ 31.167549] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.167952] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.168409] ksys_mmap_pgoff+0x3af/0x500 [ 31.168825] do_syscall_64+0x3f/0x90 [ 31.169210] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.169728] RIP: 0033:0x7f2cda613d82 [ 31.170095] 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 [ 31.171798] RSP: 002b:00007ffd4a484828 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.172530] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2cda613d82 [ 31.173212] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2cd9a4d000 [ 31.173885] RBP: 00007f2cd9a4d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.174568] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dcf57cad90 [ 31.175242] R13: 00007ffd4a484840 R14: 00007ffd4a484870 R15: 00007ffd4a484bd0 [ 31.175925] [ 31.176156] [ 31.176334] Allocated by task 212: [ 31.176679] kasan_save_stack+0x22/0x50 [ 31.177081] kasan_set_track+0x25/0x30 [ 31.177473] __kasan_slab_alloc+0x59/0x70 [ 31.177887] kmem_cache_alloc+0x16b/0x370 [ 31.178306] vm_area_dup+0x20/0x160 [ 31.178671] __split_vma+0x170/0x950 [ 31.179040] split_vma+0xc6/0x110 [ 31.179392] mprotect_fixup+0x8d2/0xb30 [ 31.179791] do_mprotect_pkey+0x87e/0xd40 [ 31.180212] __x64_sys_mprotect+0x78/0xc0 [ 31.180643] do_syscall_64+0x3f/0x90 [ 31.181026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.181537] [ 31.181715] Freed by task 212: [ 31.182031] kasan_save_stack+0x22/0x50 [ 31.182439] kasan_set_track+0x25/0x30 [ 31.182841] kasan_save_free_info+0x2b/0x50 [ 31.183266] __kasan_slab_free+0x10a/0x190 [ 31.183700] kmem_cache_free+0x10d/0x4d0 [ 31.184107] rcu_core+0x8c8/0x2860 [ 31.184471] __do_softirq+0x1b7/0x7d4 [ 31.184862] [ 31.185032] Last potentially related work creation: [ 31.185502] kasan_save_stack+0x22/0x50 [ 31.185903] __kasan_record_aux_stack+0x8e/0xa0 [ 31.186365] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.186885] remove_vma+0x139/0x170 [ 31.187251] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.187704] do_vmi_munmap+0x1f1/0x2b0 [ 31.188093] __vm_munmap+0x138/0x3a0 [ 31.188483] __x64_sys_munmap+0x59/0x80 [ 31.188882] do_syscall_64+0x3f/0x90 [ 31.189261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.189774] [ 31.189947] The buggy address belongs to the object at ffff88800e6ee488 [ 31.189947] which belongs to the cache vm_area_struct of size 168 [ 31.191126] The buggy address is located 88 bytes inside of [ 31.191126] freed 168-byte region [ffff88800e6ee488, ffff88800e6ee530) [ 31.192257] [ 31.192438] The buggy address belongs to the physical page: [ 31.192961] page:000000009a2ba6b3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6ee [ 31.194085] memcg:ffff88800ef17f01 [ 31.194424] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.194995] page_type: 0xffffffff() [ 31.195429] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.196164] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef17f01 [ 31.196918] page dumped because: kasan: bad access detected [ 31.197445] [ 31.197622] Memory state around the buggy address: [ 31.198092] ffff88800e6ee380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.198780] ffff88800e6ee400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.199469] >ffff88800e6ee480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.200153] ^ [ 31.200760] ffff88800e6ee500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.201444] ffff88800e6ee580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.202123] ================================================================== [ 31.202967] Disabling lock debugging due to kernel taint [ 33.265689] BUG: Bad rss-counter state mm:000000008a687381 type:MM_FILEPAGES val:33 [ 33.266848] BUG: Bad rss-counter state mm:000000008a687381 type:MM_ANONPAGES val:22 [ 33.661792] BUG: Bad rss-counter state mm:00000000813a56ef type:MM_FILEPAGES val:33 [ 33.663291] BUG: Bad rss-counter state mm:00000000813a56ef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65150' (ECDSA) to the list of known hosts. 2023/06/21 01:38:06 fuzzer started 2023/06/21 01:38:06 dialing manager at localhost:36067 2023/06/21 01:38:06 checking machine... 2023/06/21 01:38:06 checking revisions... [ 34.368840] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:38:06 testing simple program... [ 34.418758] cgroup: Unknown subsys name 'net' [ 34.468912] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:38:06 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100d9c135d RSI=ffffffff85407ee8 RDI=ffff88806ce09ae8 RBP=0000000000000000 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b54e7 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407ee8 R15=ffff88806ce09a98 RIP=ffffffff81131266 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 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=00007fd194440990 CR3=000000000de02000 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=2035303a38333a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a38333a3130203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000246 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff856d84a0 RSP=ffff88800ec573a0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000006 R13=ffffffff8180a924 R14=0000000000002800 R15=0000000000000000 RIP=ffffffff812d8a5e RFL=00000086 [--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 00007f3abf7c5900 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=00007f3abf78a008 CR3=000000000a11e000 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