syzkaller login: [ 30.148397] BUG: Bad rss-counter state mm:000000002b959fa4 type:MM_FILEPAGES val:33 [ 30.149780] BUG: Bad rss-counter state mm:000000002b959fa4 type:MM_ANONPAGES val:22 [ 30.310718] ================================================================== [ 30.311915] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.312851] Read of size 8 at addr ffff88800daae880 by task sshd/222 [ 30.313697] [ 30.313919] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.314775] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.315772] Call Trace: [ 30.316091] [ 30.316377] dump_stack_lvl+0x91/0xf0 [ 30.316873] print_report+0xcc/0x620 [ 30.317359] ? __virt_addr_valid+0x102/0x340 [ 30.317912] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.318529] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.319156] kasan_report+0xbe/0xf0 [ 30.319641] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.320262] vma_interval_tree_remove+0xc75/0xec0 [ 30.320863] vma_prepare+0xc54/0x11a0 [ 30.321348] __split_vma+0x5af/0x950 [ 30.321838] ? __pfx___split_vma+0x10/0x10 [ 30.322393] ? find_held_lock+0x2c/0x110 [ 30.322970] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.323568] ? lock_is_held_type+0x9f/0x120 [ 30.324139] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.324778] ? mtree_range_walk+0x632/0x900 [ 30.325364] ? mas_walk+0x5c7/0x7c0 [ 30.325864] do_vmi_munmap+0x1f1/0x2b0 [ 30.326381] mmap_region+0x1f9/0x2660 [ 30.326899] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.327437] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.328181] ? __pfx_lock_acquire+0x10/0x10 [ 30.328746] ? __pfx_mmap_region+0x10/0x10 [ 30.329300] ? security_mmap_addr+0x7d/0xa0 [ 30.329859] ? get_unmapped_area+0x1f5/0x3f0 [ 30.330436] do_mmap+0x854/0xf00 [ 30.330909] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.331432] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.332020] ksys_mmap_pgoff+0x3af/0x500 [ 30.332550] do_syscall_64+0x3f/0x90 [ 30.333059] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.333741] RIP: 0033:0x7f6c8969dd82 [ 30.334220] 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 [ 30.336470] RSP: 002b:00007ffd9fb54798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.337420] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6c8969dd82 [ 30.338315] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6c88ad7000 [ 30.339215] RBP: 00007f6c88ad7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.340133] R10: 0000000000000812 R11: 0000000000000206 R12: 000056100791fec0 [ 30.341044] R13: 00007ffd9fb547b0 R14: 00007ffd9fb547e0 R15: 00007ffd9fb54b40 [ 30.341961] [ 30.342276] [ 30.342503] Allocated by task 215: [ 30.342985] kasan_save_stack+0x22/0x50 [ 30.343579] kasan_set_track+0x25/0x30 [ 30.344114] __kasan_slab_alloc+0x59/0x70 [ 30.344680] kmem_cache_alloc+0x16b/0x370 [ 30.345230] vm_area_dup+0x20/0x160 [ 30.345718] __split_vma+0x170/0x950 [ 30.346226] split_vma+0xc6/0x110 [ 30.346712] mprotect_fixup+0x8d2/0xb30 [ 30.347260] do_mprotect_pkey+0x87e/0xd40 [ 30.347823] __x64_sys_mprotect+0x78/0xc0 [ 30.348388] do_syscall_64+0x3f/0x90 [ 30.348896] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.349588] [ 30.349818] Freed by task 215: [ 30.350244] kasan_save_stack+0x22/0x50 [ 30.350780] kasan_set_track+0x25/0x30 [ 30.351322] kasan_save_free_info+0x2b/0x50 [ 30.351892] __kasan_slab_free+0x10a/0x190 [ 30.352458] kmem_cache_free+0x10d/0x4d0 [ 30.353018] rcu_core+0x8c8/0x2860 [ 30.353513] __do_softirq+0x1b7/0x7d4 [ 30.354050] [ 30.354288] Last potentially related work creation: [ 30.354942] kasan_save_stack+0x22/0x50 [ 30.355497] __kasan_record_aux_stack+0x8e/0xa0 [ 30.356130] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.356839] remove_vma+0x139/0x170 [ 30.357338] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.357957] do_vmi_munmap+0x1f1/0x2b0 [ 30.358494] __vm_munmap+0x138/0x3a0 [ 30.359016] __x64_sys_munmap+0x59/0x80 [ 30.359566] do_syscall_64+0x3f/0x90 [ 30.360066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.360744] [ 30.360971] The buggy address belongs to the object at ffff88800daae828 [ 30.360971] which belongs to the cache vm_area_struct of size 168 [ 30.362518] The buggy address is located 88 bytes inside of [ 30.362518] freed 168-byte region [ffff88800daae828, ffff88800daae8d0) [ 30.364014] [ 30.364245] The buggy address belongs to the physical page: [ 30.364946] page:00000000af0684c1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdaae [ 30.366089] memcg:ffff88800d137601 [ 30.366536] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.367287] page_type: 0xffffffff() [ 30.367761] raw: 0100000000000200 ffff8880087a0c80 ffffea000036fbc0 dead000000000005 [ 30.368771] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d137601 [ 30.369775] page dumped because: kasan: bad access detected [ 30.370501] [ 30.370737] Memory state around the buggy address: [ 30.371396] ffff88800daae780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.372340] ffff88800daae800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.373283] >ffff88800daae880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.374225] ^ [ 30.374679] ffff88800daae900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.375625] ffff88800daae980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.376559] ================================================================== [ 30.377650] Disabling lock debugging due to kernel taint [ 32.273188] BUG: Bad rss-counter state mm:00000000b36cee23 type:MM_FILEPAGES val:33 [ 32.273922] BUG: Bad rss-counter state mm:00000000b36cee23 type:MM_ANONPAGES val:22 [ 32.715760] BUG: Bad rss-counter state mm:00000000951eb077 type:MM_FILEPAGES val:33 [ 32.716834] BUG: Bad rss-counter state mm:00000000951eb077 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37380' (ECDSA) to the list of known hosts. 2023/06/20 15:46:35 fuzzer started 2023/06/20 15:46:36 dialing manager at localhost:36067 2023/06/20 15:46:36 checking machine... 2023/06/20 15:46:36 checking revisions... [ 33.435495] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:46:36 testing simple program... [ 33.487469] cgroup: Unknown subsys name 'net' [ 33.527869] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:46:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86138e01 RDX=0000000000000001 RSI=ffffffff8180effe RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86138e90 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff811306ec 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 00007fa689a79700 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=00007f7a97cdc450 CR3=0000000016a0e000 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=2035333a36343a3531203032206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a36343a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888015f376b0 RCX=0000000000000001 RDX=1ffff11002be6ed6 RSI=ffffffff818080db RDI=ffff888015f376bc RBP=0000000000000005 RSP=ffff888015f375c8 R8 =0000000000000001 R9 =ffff888015f37628 R10=0000000000038001 R11=0000000000021ee8 R12=ffff888015f376b0 R13=0000000000000000 R14=ffff88801651b680 R15=0000000000092cc0 RIP=ffffffff813ad525 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 00007feb21f1a900 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=00007feb224d20b0 CR3=000000000eb4e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000