syzkaller login: [ 31.077586] BUG: Bad rss-counter state mm:000000006f3726da type:MM_FILEPAGES val:33 [ 31.078809] BUG: Bad rss-counter state mm:000000006f3726da type:MM_ANONPAGES val:22 [ 31.116121] ================================================================== [ 31.117106] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.118048] Read of size 8 at addr ffff88801039fb38 by task sshd/221 [ 31.118813] [ 31.119034] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.119922] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.120895] Call Trace: [ 31.121221] [ 31.121508] dump_stack_lvl+0x91/0xf0 [ 31.122006] print_report+0xcc/0x620 [ 31.122491] ? __virt_addr_valid+0x102/0x340 [ 31.123048] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.123680] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.124292] kasan_report+0xbe/0xf0 [ 31.124773] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.125405] vma_interval_tree_remove+0xc75/0xec0 [ 31.126016] vma_prepare+0xc54/0x11a0 [ 31.126623] __split_vma+0x5af/0x950 [ 31.127101] ? __pfx___split_vma+0x10/0x10 [ 31.127647] ? find_held_lock+0x2c/0x110 [ 31.128176] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.128766] ? lock_is_held_type+0x9f/0x120 [ 31.129312] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.129920] ? mtree_range_walk+0x632/0x900 [ 31.130480] ? mas_walk+0x5c7/0x7c0 [ 31.130967] do_vmi_munmap+0x1f1/0x2b0 [ 31.131471] mmap_region+0x1f9/0x2660 [ 31.131961] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.132473] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.133193] ? __pfx_lock_acquire+0x10/0x10 [ 31.133732] ? __pfx_mmap_region+0x10/0x10 [ 31.134261] ? security_mmap_addr+0x7d/0xa0 [ 31.134800] ? get_unmapped_area+0x1f5/0x3f0 [ 31.135355] do_mmap+0x854/0xf00 [ 31.135809] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.136310] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.136880] ksys_mmap_pgoff+0x3af/0x500 [ 31.137398] do_syscall_64+0x3f/0x90 [ 31.137888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.138539] RIP: 0033:0x7f2f8e1b9d82 [ 31.139003] 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 [ 31.141179] RSP: 002b:00007ffdc3513818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.142099] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2f8e1b9d82 [ 31.142962] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2f8d5f3000 [ 31.143831] RBP: 00007f2f8d5f3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.144690] R10: 0000000000000812 R11: 0000000000000206 R12: 000055968eba3ec0 [ 31.145552] R13: 00007ffdc3513830 R14: 00007ffdc3513860 R15: 00007ffdc3513bc0 [ 31.146418] [ 31.146717] [ 31.146931] Allocated by task 214: [ 31.147382] kasan_save_stack+0x22/0x50 [ 31.147900] kasan_set_track+0x25/0x30 [ 31.148395] __kasan_slab_alloc+0x59/0x70 [ 31.148925] kmem_cache_alloc+0x16b/0x370 [ 31.149447] vm_area_dup+0x20/0x160 [ 31.149903] __split_vma+0x170/0x950 [ 31.150376] split_vma+0xc6/0x110 [ 31.150822] mprotect_fixup+0x8d2/0xb30 [ 31.151341] do_mprotect_pkey+0x87e/0xd40 [ 31.151869] __x64_sys_mprotect+0x78/0xc0 [ 31.152397] do_syscall_64+0x3f/0x90 [ 31.152880] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.153525] [ 31.153743] Freed by task 214: [ 31.154142] kasan_save_stack+0x22/0x50 [ 31.154647] kasan_set_track+0x25/0x30 [ 31.155148] kasan_save_free_info+0x2b/0x50 [ 31.155698] __kasan_slab_free+0x10a/0x190 [ 31.156237] kmem_cache_free+0x10d/0x4d0 [ 31.156755] rcu_core+0x8c8/0x2860 [ 31.157210] __do_softirq+0x1b7/0x7d4 [ 31.157697] [ 31.157916] Last potentially related work creation: [ 31.158524] kasan_save_stack+0x22/0x50 [ 31.159035] __kasan_record_aux_stack+0x8e/0xa0 [ 31.159657] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.160307] remove_vma+0x139/0x170 [ 31.160762] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.161323] do_vmi_munmap+0x1f1/0x2b0 [ 31.161808] __vm_munmap+0x138/0x3a0 [ 31.162277] __x64_sys_munmap+0x59/0x80 [ 31.162789] do_syscall_64+0x3f/0x90 [ 31.163273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.163921] [ 31.164137] The buggy address belongs to the object at ffff88801039fae0 [ 31.164137] which belongs to the cache vm_area_struct of size 168 [ 31.165622] The buggy address is located 88 bytes inside of [ 31.165622] freed 168-byte region [ffff88801039fae0, ffff88801039fb88) [ 31.167041] [ 31.167268] The buggy address belongs to the physical page: [ 31.167936] page:00000000b5110d73 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1039f [ 31.169042] memcg:ffff888015dda301 [ 31.169470] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.170121] page_type: 0xffffffff() [ 31.170583] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.171526] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015dda301 [ 31.172442] page dumped because: kasan: bad access detected [ 31.173114] [ 31.173330] Memory state around the buggy address: [ 31.173917] ffff88801039fa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.174779] ffff88801039fa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.175656] >ffff88801039fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.176515] ^ [ 31.177127] ffff88801039fb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.177993] ffff88801039fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.178849] ================================================================== [ 31.179918] Disabling lock debugging due to kernel taint [ 33.454538] BUG: Bad rss-counter state mm:00000000eef9fb3d type:MM_FILEPAGES val:33 [ 33.455702] BUG: Bad rss-counter state mm:00000000eef9fb3d type:MM_ANONPAGES val:22 [ 33.865808] BUG: Bad rss-counter state mm:00000000ea28a40b type:MM_FILEPAGES val:33 [ 33.866847] BUG: Bad rss-counter state mm:00000000ea28a40b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51664' (ECDSA) to the list of known hosts. 2023/06/20 13:41:40 fuzzer started 2023/06/20 13:41:40 dialing manager at localhost:36067 2023/06/20 13:41:40 checking machine... 2023/06/20 13:41:40 checking revisions... [ 34.516257] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:41:40 testing simple program... [ 34.564312] cgroup: Unknown subsys name 'net' [ 34.606895] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:41:39 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000002 RCX=0000000080000000 RDX=ffff88801037d1c0 RSI=ffffffff814d80a8 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880145dfee0 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000002 R11=0000000000000000 R12=000000000000002e R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c0871 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 00007ff6d5868900 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=00007ff6d4c58ce0 CR3=000000000f452000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=e5de967fd744eda600000000000ae988 XMM05=2cb9e36fb4b451de0000000000135418 XMM06=c291bd5c70af25b90000000000134208 XMM07=fb795ef6d65770560000000000124c10 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888016891b40 RBX=ffffffff813ad470 RCX=ffff8880196c72a0 RDX=0000000000000000 RSI=ffff888016891b40 RDI=ffff8880196c7208 RBP=ffff8880196c72a0 RSP=ffff8880196c71f8 R8 =0000000000042a50 R9 =0000000000000000 R10=ffffed10012938a0 R11=ffff88800949c500 R12=ffff8880196c72d0 R13=0000000000000000 R14=ffff888016891b40 R15=0000000000000cc0 RIP=ffffffff81132a76 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 00007f57816bb900 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=00007ffd730e4000 CR3=000000000e9c8000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000