syzkaller login: [ 30.995398] BUG: Bad rss-counter state mm:0000000080507a84 type:MM_FILEPAGES val:33 [ 30.996180] BUG: Bad rss-counter state mm:0000000080507a84 type:MM_ANONPAGES val:22 [ 31.126696] ================================================================== [ 31.127353] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.128045] Read of size 8 at addr ffff88801a3c3140 by task sshd/220 [ 31.128559] [ 31.128702] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.129274] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.129953] Call Trace: [ 31.130169] [ 31.130384] dump_stack_lvl+0x91/0xf0 [ 31.130726] print_report+0xcc/0x620 [ 31.131297] ? __virt_addr_valid+0x102/0x340 [ 31.131751] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.132169] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.132610] kasan_report+0xbe/0xf0 [ 31.132928] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.133325] vma_interval_tree_remove+0xc75/0xec0 [ 31.133764] vma_prepare+0xc54/0x11a0 [ 31.134096] __split_vma+0x5af/0x950 [ 31.134402] ? __pfx___split_vma+0x10/0x10 [ 31.134746] ? find_held_lock+0x2c/0x110 [ 31.135087] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.135501] ? lock_is_held_type+0x9f/0x120 [ 31.135885] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.136281] ? mtree_range_walk+0x632/0x900 [ 31.136685] ? mas_walk+0x5c7/0x7c0 [ 31.136995] do_vmi_munmap+0x1f1/0x2b0 [ 31.137328] mmap_region+0x1f9/0x2660 [ 31.137661] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.137986] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.138438] ? __pfx_lock_acquire+0x10/0x10 [ 31.138780] ? __pfx_mmap_region+0x10/0x10 [ 31.139113] ? security_mmap_addr+0x7d/0xa0 [ 31.139450] ? get_unmapped_area+0x1f5/0x3f0 [ 31.139850] do_mmap+0x854/0xf00 [ 31.140131] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.140483] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.140840] ksys_mmap_pgoff+0x3af/0x500 [ 31.141157] do_syscall_64+0x3f/0x90 [ 31.141460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.141902] RIP: 0033:0x7f4547b6ad82 [ 31.142192] 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 [ 31.143792] RSP: 002b:00007fff730a0e68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.144461] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4547b6ad82 [ 31.145047] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4546fa4000 [ 31.145693] RBP: 00007f4546fa4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.146282] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a7ece0ec0 [ 31.146897] R13: 00007fff730a0e80 R14: 00007fff730a0eb0 R15: 00007fff730a1210 [ 31.147466] [ 31.147681] [ 31.147853] Allocated by task 213: [ 31.148168] kasan_save_stack+0x22/0x50 [ 31.148538] kasan_set_track+0x25/0x30 [ 31.148895] __kasan_slab_alloc+0x59/0x70 [ 31.149254] kmem_cache_alloc+0x16b/0x370 [ 31.149606] vm_area_dup+0x20/0x160 [ 31.149907] __split_vma+0x170/0x950 [ 31.150207] split_vma+0xc6/0x110 [ 31.150534] mprotect_fixup+0x8d2/0xb30 [ 31.150916] do_mprotect_pkey+0x87e/0xd40 [ 31.151274] __x64_sys_mprotect+0x78/0xc0 [ 31.151667] do_syscall_64+0x3f/0x90 [ 31.152041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.152486] [ 31.152655] Freed by task 213: [ 31.152929] kasan_save_stack+0x22/0x50 [ 31.153279] kasan_set_track+0x25/0x30 [ 31.153663] kasan_save_free_info+0x2b/0x50 [ 31.154012] __kasan_slab_free+0x10a/0x190 [ 31.154363] kmem_cache_free+0x10d/0x4d0 [ 31.154752] rcu_core+0x8c8/0x2860 [ 31.155046] __do_softirq+0x1b7/0x7d4 [ 31.155383] [ 31.155542] Last potentially related work creation: [ 31.155948] kasan_save_stack+0x22/0x50 [ 31.156276] __kasan_record_aux_stack+0x8e/0xa0 [ 31.156705] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.157135] remove_vma+0x139/0x170 [ 31.157474] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.157847] do_vmi_munmap+0x1f1/0x2b0 [ 31.158172] __vm_munmap+0x138/0x3a0 [ 31.158479] __x64_sys_munmap+0x59/0x80 [ 31.158825] do_syscall_64+0x3f/0x90 [ 31.159140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.159570] [ 31.159754] The buggy address belongs to the object at ffff88801a3c30e8 [ 31.159754] which belongs to the cache vm_area_struct of size 168 [ 31.160770] The buggy address is located 88 bytes inside of [ 31.160770] freed 168-byte region [ffff88801a3c30e8, ffff88801a3c3190) [ 31.161708] [ 31.161850] The buggy address belongs to the physical page: [ 31.162306] page:0000000097bb21ec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3c3 [ 31.163074] memcg:ffff88800d97d601 [ 31.163366] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.163839] page_type: 0xffffffff() [ 31.164135] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.164774] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d97d601 [ 31.165380] page dumped because: kasan: bad access detected [ 31.165839] [ 31.165979] Memory state around the buggy address: [ 31.166374] ffff88801a3c3000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.166944] ffff88801a3c3080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.167505] >ffff88801a3c3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.168103] ^ [ 31.168542] ffff88801a3c3180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.169104] ffff88801a3c3200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.169678] ================================================================== [ 31.170331] Disabling lock debugging due to kernel taint [ 32.694801] BUG: Bad rss-counter state mm:000000007d28435f type:MM_FILEPAGES val:33 [ 32.695584] BUG: Bad rss-counter state mm:000000007d28435f type:MM_ANONPAGES val:22 [ 33.100526] BUG: Bad rss-counter state mm:0000000011a7a3c3 type:MM_FILEPAGES val:33 [ 33.101178] BUG: Bad rss-counter state mm:0000000011a7a3c3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18929' (ECDSA) to the list of known hosts. 2023/06/21 09:04:35 fuzzer started 2023/06/21 09:04:35 dialing manager at localhost:36067 2023/06/21 09:04:35 checking machine... 2023/06/21 09:04:35 checking revisions... [ 33.656188] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:04:35 testing simple program... [ 33.691939] cgroup: Unknown subsys name 'net' [ 33.746166] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:04:35 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ffc69d14d28 CR3=000000000f1d8000 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=2035333a34303a3930203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a34303a3930203132 XMM08=7020303d64696720303d64697520612f XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110025ecf2b RSI=ffffffff83639ab1 RDI=ffff888012f678f8 RBP=ffff888012f67950 RSP=ffff888012f67888 R8 =0000000000000001 R9 =ffff888012f67938 R10=0000000000038001 R11=000000000008a6d9 R12=ffff888012f67958 R13=ffff888012f67940 R14=ffff888018dcb680 R15=ffff888012f678f8 RIP=ffffffff81130682 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 00007f7c0280e900 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=00007f7c02dc60b0 CR3=000000001a272000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000