syzkaller login: [ 31.099270] BUG: Bad rss-counter state mm:0000000053edb4b4 type:MM_FILEPAGES val:33 [ 31.100457] BUG: Bad rss-counter state mm:0000000053edb4b4 type:MM_ANONPAGES val:22 [ 31.139443] ================================================================== [ 31.140459] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.141452] Read of size 8 at addr ffff8880199413f8 by task sshd/222 [ 31.142226] [ 31.142450] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.143620] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.144738] Call Trace: [ 31.145143] [ 31.145438] dump_stack_lvl+0x91/0xf0 [ 31.145944] print_report+0xcc/0x620 [ 31.146521] ? __virt_addr_valid+0x102/0x340 [ 31.147091] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.147822] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.148567] kasan_report+0xbe/0xf0 [ 31.149216] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.149852] vma_interval_tree_remove+0xc75/0xec0 [ 31.150460] vma_prepare+0xc54/0x11a0 [ 31.150949] __split_vma+0x5af/0x950 [ 31.151434] ? __pfx___split_vma+0x10/0x10 [ 31.151977] ? find_held_lock+0x2c/0x110 [ 31.152508] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.153094] ? lock_is_held_type+0x9f/0x120 [ 31.153651] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.154277] ? mtree_range_walk+0x632/0x900 [ 31.154829] ? mas_walk+0x5c7/0x7c0 [ 31.155316] do_vmi_munmap+0x1f1/0x2b0 [ 31.155819] mmap_region+0x1f9/0x2660 [ 31.156309] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.156825] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.157561] ? __pfx_lock_acquire+0x10/0x10 [ 31.158093] ? __pfx_mmap_region+0x10/0x10 [ 31.158628] ? security_mmap_addr+0x7d/0xa0 [ 31.159162] ? get_unmapped_area+0x1f5/0x3f0 [ 31.159719] do_mmap+0x854/0xf00 [ 31.160167] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.160661] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.161244] ksys_mmap_pgoff+0x3af/0x500 [ 31.161756] do_syscall_64+0x3f/0x90 [ 31.162237] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.162885] RIP: 0033:0x7fedffb8ed82 [ 31.163348] 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 [ 31.165478] RSP: 002b:00007fffa5b90448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.166386] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fedffb8ed82 [ 31.167238] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fedfefc8000 [ 31.168090] RBP: 00007fedfefc8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.168940] R10: 0000000000000812 R11: 0000000000000206 R12: 00005637d884bd90 [ 31.169792] R13: 00007fffa5b90460 R14: 00007fffa5b90490 R15: 00007fffa5b907f0 [ 31.170659] [ 31.170959] [ 31.171183] Allocated by task 215: [ 31.171613] kasan_save_stack+0x22/0x50 [ 31.172121] kasan_set_track+0x25/0x30 [ 31.172618] __kasan_slab_alloc+0x59/0x70 [ 31.173162] kmem_cache_alloc+0x16b/0x370 [ 31.173681] vm_area_dup+0x20/0x160 [ 31.174136] __split_vma+0x170/0x950 [ 31.174607] split_vma+0xc6/0x110 [ 31.175048] mprotect_fixup+0x8d2/0xb30 [ 31.175559] do_mprotect_pkey+0x87e/0xd40 [ 31.176079] __x64_sys_mprotect+0x78/0xc0 [ 31.176603] do_syscall_64+0x3f/0x90 [ 31.177085] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.177732] [ 31.177950] Freed by task 215: [ 31.178347] kasan_save_stack+0x22/0x50 [ 31.178849] kasan_set_track+0x25/0x30 [ 31.179350] kasan_save_free_info+0x2b/0x50 [ 31.179887] __kasan_slab_free+0x10a/0x190 [ 31.180424] kmem_cache_free+0x10d/0x4d0 [ 31.180931] rcu_core+0x8c8/0x2860 [ 31.181393] __do_softirq+0x1b7/0x7d4 [ 31.181871] [ 31.182089] Last potentially related work creation: [ 31.182673] kasan_save_stack+0x22/0x50 [ 31.183182] __kasan_record_aux_stack+0x8e/0xa0 [ 31.183766] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.184411] remove_vma+0x139/0x170 [ 31.184976] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.185542] do_vmi_munmap+0x1f1/0x2b0 [ 31.186034] __vm_munmap+0x138/0x3a0 [ 31.186503] __x64_sys_munmap+0x59/0x80 [ 31.187015] do_syscall_64+0x3f/0x90 [ 31.187496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.188147] [ 31.188367] The buggy address belongs to the object at ffff8880199413a0 [ 31.188367] which belongs to the cache vm_area_struct of size 168 [ 31.189853] The buggy address is located 88 bytes inside of [ 31.189853] freed 168-byte region [ffff8880199413a0, ffff888019941448) [ 31.191270] [ 31.191494] The buggy address belongs to the physical page: [ 31.192164] page:000000001b501481 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19941 [ 31.193283] memcg:ffff888016a6d201 [ 31.193716] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.194359] page_type: 0xffffffff() [ 31.194816] raw: 0100000000000200 ffff8880087a0c80 ffffea000060b200 dead000000000008 [ 31.195742] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a6d201 [ 31.196657] page dumped because: kasan: bad access detected [ 31.197333] [ 31.197551] Memory state around the buggy address: [ 31.198134] ffff888019941280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.198999] ffff888019941300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.199867] >ffff888019941380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.200719] ^ [ 31.201585] ffff888019941400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.202445] ffff888019941480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.203309] ================================================================== [ 31.204217] Disabling lock debugging due to kernel taint [ 33.661406] BUG: Bad rss-counter state mm:00000000c1296f2e type:MM_FILEPAGES val:33 [ 33.662559] BUG: Bad rss-counter state mm:00000000c1296f2e type:MM_ANONPAGES val:22 [ 34.075145] BUG: Bad rss-counter state mm:00000000f742ffe7 type:MM_FILEPAGES val:33 [ 34.076308] BUG: Bad rss-counter state mm:00000000f742ffe7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25424' (ECDSA) to the list of known hosts. 2023/06/20 20:06:56 fuzzer started 2023/06/20 20:06:56 dialing manager at localhost:36067 2023/06/20 20:06:56 checking machine... 2023/06/20 20:06:56 checking revisions... [ 34.781216] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:06:56 testing simple program... [ 34.821813] cgroup: Unknown subsys name 'net' [ 34.870821] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:06:56 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888009af8000 RCX=ffffffff8164fc97 RDX=ffff888015cd9b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016edfa70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=ffff88800d509800 R14=ffff888015d4c000 R15=ffff888015cd9b40 RIP=ffffffff814c0261 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 00007f98ab87c700 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=00007fffac1aa718 CR3=000000000c49e000 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=2036353a36303a3032203032206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a36303a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800d551800 RBX=0000000000000000 RCX=0000000080100010 RDX=000000008010000e RSI=ffffffff81806deb RDI=0000000000000000 RBP=ffff88800d94f620 RSP=ffff88800d94f560 R8 =0000000080100010 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffffffff81806f71 R12=ffff88800844f140 R13=ffff88800d553c00 R14=ffffea0000355400 R15=ffff88806cf3dc70 RIP=ffffffff81807426 RFL=00000082 [--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 00007fc3962d0900 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=00007f9613ad7650 CR3=000000000c4b4000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=fee892dc97e3bf4900000000000ae988 XMM05=d8247f26198a4d4900000000001336e8 XMM06=59d5b690e0af863b0000000000132580 XMM07=fb795ef6d657705600000000001226f8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000