syzkaller login: [ 39.954734] BUG: Bad rss-counter state mm:00000000f7cd7b22 type:MM_FILEPAGES val:33 [ 39.956873] BUG: Bad rss-counter state mm:00000000f7cd7b22 type:MM_ANONPAGES val:22 [ 40.135733] ================================================================== [ 40.136741] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.137783] Read of size 8 at addr ffff888018fefb38 by task sshd/219 [ 40.138715] [ 40.138957] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.139910] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.140996] Call Trace: [ 40.141355] [ 40.141673] dump_stack_lvl+0x91/0xf0 [ 40.142237] print_report+0xcc/0x620 [ 40.142770] ? __virt_addr_valid+0x102/0x340 [ 40.143389] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.144079] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.144775] kasan_report+0xbe/0xf0 [ 40.145313] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.146014] vma_interval_tree_remove+0xc75/0xec0 [ 40.146688] vma_prepare+0xc54/0x11a0 [ 40.147226] __split_vma+0x5af/0x950 [ 40.147748] ? __pfx___split_vma+0x10/0x10 [ 40.148336] ? find_held_lock+0x2c/0x110 [ 40.148916] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.149551] ? lock_is_held_type+0x9f/0x120 [ 40.150170] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.150852] ? mtree_range_walk+0x632/0x900 [ 40.151473] ? mas_walk+0x5c7/0x7c0 [ 40.152003] do_vmi_munmap+0x1f1/0x2b0 [ 40.152544] mmap_region+0x1f9/0x2660 [ 40.153086] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.153652] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.154476] ? __pfx_lock_acquire+0x10/0x10 [ 40.155074] ? __pfx_mmap_region+0x10/0x10 [ 40.155662] ? security_mmap_addr+0x7d/0xa0 [ 40.156259] ? get_unmapped_area+0x1f5/0x3f0 [ 40.156866] do_mmap+0x854/0xf00 [ 40.157346] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.157898] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.158533] ksys_mmap_pgoff+0x3af/0x500 [ 40.159097] do_syscall_64+0x3f/0x90 [ 40.159631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.160360] RIP: 0033:0x7f707d136d82 [ 40.160861] 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 [ 40.163233] RSP: 002b:00007ffc32e927b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.164240] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f707d136d82 [ 40.165182] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f707c570000 [ 40.166137] RBP: 00007f707c570000 R08: 0000000000000009 R09: 0000000000001000 [ 40.167086] R10: 0000000000000812 R11: 0000000000000206 R12: 000055db68e05b20 [ 40.168037] R13: 00007ffc32e927d0 R14: 00007ffc32e92800 R15: 00007ffc32e92b60 [ 40.168986] [ 40.169318] [ 40.169558] Allocated by task 212: [ 40.170051] kasan_save_stack+0x22/0x50 [ 40.170614] kasan_set_track+0x25/0x30 [ 40.171165] __kasan_slab_alloc+0x59/0x70 [ 40.171751] kmem_cache_alloc+0x16b/0x370 [ 40.172328] vm_area_dup+0x20/0x160 [ 40.172837] __split_vma+0x170/0x950 [ 40.173359] split_vma+0xc6/0x110 [ 40.173853] mprotect_fixup+0x8d2/0xb30 [ 40.174429] do_mprotect_pkey+0x87e/0xd40 [ 40.175009] __x64_sys_mprotect+0x78/0xc0 [ 40.175586] do_syscall_64+0x3f/0x90 [ 40.176119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.176835] [ 40.177079] Freed by task 212: [ 40.177518] kasan_save_stack+0x22/0x50 [ 40.178087] kasan_set_track+0x25/0x30 [ 40.178647] kasan_save_free_info+0x2b/0x50 [ 40.179249] __kasan_slab_free+0x10a/0x190 [ 40.179837] kmem_cache_free+0x10d/0x4d0 [ 40.180402] rcu_core+0x8c8/0x2860 [ 40.180902] __do_softirq+0x1b7/0x7d4 [ 40.181429] [ 40.181669] Last potentially related work creation: [ 40.182333] kasan_save_stack+0x22/0x50 [ 40.182905] __kasan_record_aux_stack+0x8e/0xa0 [ 40.183553] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.184270] remove_vma+0x139/0x170 [ 40.184772] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.185394] do_vmi_munmap+0x1f1/0x2b0 [ 40.185928] __vm_munmap+0x138/0x3a0 [ 40.186455] __x64_sys_munmap+0x59/0x80 [ 40.187007] do_syscall_64+0x3f/0x90 [ 40.187539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.188248] [ 40.188490] The buggy address belongs to the object at ffff888018fefae0 [ 40.188490] which belongs to the cache vm_area_struct of size 168 [ 40.190153] The buggy address is located 88 bytes inside of [ 40.190153] freed 168-byte region [ffff888018fefae0, ffff888018fefb88) [ 40.191720] [ 40.191957] The buggy address belongs to the physical page: [ 40.192696] page:00000000142673f3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18fef [ 40.193898] memcg:ffff888018fee201 [ 40.194381] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.195113] page_type: 0xffffffff() [ 40.195615] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.196640] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018fee201 [ 40.197650] page dumped because: kasan: bad access detected [ 40.198398] [ 40.198636] Memory state around the buggy address: [ 40.199289] ffff888018fefa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.200243] ffff888018fefa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 40.201207] >ffff888018fefb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.202184] ^ [ 40.202860] ffff888018fefb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 40.203826] ffff888018fefc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 40.204772] ================================================================== [ 40.205948] Disabling lock debugging due to kernel taint [ 42.430634] BUG: Bad rss-counter state mm:0000000050089839 type:MM_FILEPAGES val:33 [ 42.431374] BUG: Bad rss-counter state mm:0000000050089839 type:MM_ANONPAGES val:22 [ 42.812324] BUG: Bad rss-counter state mm:00000000c99c5524 type:MM_FILEPAGES val:33 [ 42.812892] BUG: Bad rss-counter state mm:00000000c99c5524 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65234' (ECDSA) to the list of known hosts. 2023/06/19 16:52:07 fuzzer started 2023/06/19 16:52:08 dialing manager at localhost:44161 2023/06/19 16:52:08 checking machine... 2023/06/19 16:52:08 checking revisions... [ 43.456618] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:52:08 testing simple program... [ 43.502791] cgroup: Unknown subsys name 'net' [ 43.554812] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:51:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=00000000000000eb RDI=ffffffff84935f60 RBP=ffffffff84935f60 RSP=ffff88800ea4f780 R8 =ffff8880161b23a0 R9 =0000000000000001 R10=0000000000000000 R11=00000000000b6996 R12=00000000000000eb R13=ffff888010002000 R14=ffff8880194802d8 R15=ffff888010004000 RIP=ffffffff8122e3bd 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 00007f0399468700 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=00007facbb035bd0 CR3=000000000ee5c000 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=2037303a32353a3631203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a32353a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801661f158 RCX=0000000000000001 RDX=1ffff11002cc3e36 RSI=ffff88801661f810 RDI=ffff88801661f158 RBP=ffff88801661f1b0 RSP=ffff88801661f140 R8 =0000000000000001 R9 =ffff88801661f198 R10=0000000000038001 R11=0000000000091af6 R12=ffff88801661f220 R13=0000000000000000 R14=ffff88801bdd0000 R15=0000000000092cc0 RIP=ffffffff8113038e 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 00007f92423ff900 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=00007f92429b6618 CR3=00000000146e2000 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=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