syzkaller login: [ 30.986240] BUG: Bad rss-counter state mm:000000009061758d type:MM_FILEPAGES val:33 [ 30.987198] BUG: Bad rss-counter state mm:000000009061758d type:MM_ANONPAGES val:22 [ 31.099919] ================================================================== [ 31.100569] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.101203] Read of size 8 at addr ffff88800edbea50 by task sshd/223 [ 31.101712] [ 31.101891] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.102502] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.103184] Call Trace: [ 31.103391] [ 31.103577] dump_stack_lvl+0x91/0xf0 [ 31.103902] print_report+0xcc/0x620 [ 31.104407] ? __virt_addr_valid+0x102/0x340 [ 31.104811] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.105259] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.105688] kasan_report+0xbe/0xf0 [ 31.106054] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.106478] vma_interval_tree_remove+0xc75/0xec0 [ 31.106922] vma_prepare+0xc54/0x11a0 [ 31.107254] __split_vma+0x5af/0x950 [ 31.107562] ? __pfx___split_vma+0x10/0x10 [ 31.107919] ? find_held_lock+0x2c/0x110 [ 31.108279] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.108656] ? lock_is_held_type+0x9f/0x120 [ 31.109011] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.109413] ? mtree_range_walk+0x632/0x900 [ 31.109803] ? mas_walk+0x5c7/0x7c0 [ 31.110156] do_vmi_munmap+0x1f1/0x2b0 [ 31.110487] mmap_region+0x1f9/0x2660 [ 31.110816] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.111162] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.111651] ? __pfx_lock_acquire+0x10/0x10 [ 31.112003] ? __pfx_mmap_region+0x10/0x10 [ 31.112360] ? security_mmap_addr+0x7d/0xa0 [ 31.112714] ? get_unmapped_area+0x1f5/0x3f0 [ 31.113081] do_mmap+0x854/0xf00 [ 31.113368] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.113690] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.114100] ksys_mmap_pgoff+0x3af/0x500 [ 31.114435] do_syscall_64+0x3f/0x90 [ 31.114761] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.115200] RIP: 0033:0x7fd75f7b8d82 [ 31.115524] 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 [ 31.116883] RSP: 002b:00007ffc929bc218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.117481] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd75f7b8d82 [ 31.118068] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd75ebf2000 [ 31.118611] RBP: 00007fd75ebf2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.119165] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557bd823dec0 [ 31.119734] R13: 00007ffc929bc230 R14: 00007ffc929bc260 R15: 00007ffc929bc5c0 [ 31.120303] [ 31.120493] [ 31.120638] Allocated by task 216: [ 31.120905] kasan_save_stack+0x22/0x50 [ 31.121219] kasan_set_track+0x25/0x30 [ 31.121518] __kasan_slab_alloc+0x59/0x70 [ 31.121891] kmem_cache_alloc+0x16b/0x370 [ 31.122218] vm_area_dup+0x20/0x160 [ 31.122491] __split_vma+0x170/0x950 [ 31.122788] split_vma+0xc6/0x110 [ 31.123071] mprotect_fixup+0x8d2/0xb30 [ 31.123403] do_mprotect_pkey+0x87e/0xd40 [ 31.123744] __x64_sys_mprotect+0x78/0xc0 [ 31.124086] do_syscall_64+0x3f/0x90 [ 31.124399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.124814] [ 31.124960] Freed by task 216: [ 31.125213] kasan_save_stack+0x22/0x50 [ 31.125539] kasan_set_track+0x25/0x30 [ 31.125890] kasan_save_free_info+0x2b/0x50 [ 31.126235] __kasan_slab_free+0x10a/0x190 [ 31.126564] kmem_cache_free+0x10d/0x4d0 [ 31.126869] rcu_core+0x8c8/0x2860 [ 31.127131] __do_softirq+0x1b7/0x7d4 [ 31.127417] [ 31.127556] Last potentially related work creation: [ 31.127946] kasan_save_stack+0x22/0x50 [ 31.128269] __kasan_record_aux_stack+0x8e/0xa0 [ 31.128640] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.129054] remove_vma+0x139/0x170 [ 31.129341] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.129694] do_vmi_munmap+0x1f1/0x2b0 [ 31.130202] __vm_munmap+0x138/0x3a0 [ 31.130512] __x64_sys_munmap+0x59/0x80 [ 31.130827] do_syscall_64+0x3f/0x90 [ 31.131135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.131533] [ 31.131667] The buggy address belongs to the object at ffff88800edbe9f8 [ 31.131667] which belongs to the cache vm_area_struct of size 168 [ 31.132562] The buggy address is located 88 bytes inside of [ 31.132562] freed 168-byte region [ffff88800edbe9f8, ffff88800edbeaa0) [ 31.133442] [ 31.133576] The buggy address belongs to the physical page: [ 31.134019] page:00000000df46005e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedbe [ 31.134687] memcg:ffff88800e0c0501 [ 31.134978] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.135398] page_type: 0xffffffff() [ 31.135708] raw: 0100000000000200 ffff88800879fc80 ffffea000037c340 dead000000000008 [ 31.136282] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0c0501 [ 31.136823] page dumped because: kasan: bad access detected [ 31.137224] [ 31.137362] Memory state around the buggy address: [ 31.137747] ffff88800edbe900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.138323] ffff88800edbe980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.138881] >ffff88800edbea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.139421] ^ [ 31.139845] ffff88800edbea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.140361] ffff88800edbeb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.140868] ================================================================== [ 31.141491] Disabling lock debugging due to kernel taint [ 32.906590] BUG: Bad rss-counter state mm:00000000b4da1565 type:MM_FILEPAGES val:33 [ 32.907291] BUG: Bad rss-counter state mm:00000000b4da1565 type:MM_ANONPAGES val:22 [ 33.269828] BUG: Bad rss-counter state mm:00000000bd612f24 type:MM_FILEPAGES val:33 [ 33.270586] BUG: Bad rss-counter state mm:00000000bd612f24 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22676' (ECDSA) to the list of known hosts. 2023/06/20 08:33:54 fuzzer started 2023/06/20 08:33:54 dialing manager at localhost:44161 2023/06/20 08:33:54 checking machine... 2023/06/20 08:33:54 checking revisions... [ 33.859923] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:33:54 testing simple program... [ 33.896234] cgroup: Unknown subsys name 'net' [ 33.944304] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:33:53 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff86137dd2 RDX=1ffff1100d9c135c RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86137dd6 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020f00 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09e08 R15=ffff88806ce09a98 RIP=ffffffff81131c60 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 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=00007ffc5f94adc8 CR3=000000000dc36000 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=2034353a33333a3830203032206e754a XMM01=657463656e6e6f63736944203a5d3233 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3233325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a33333a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff83653a80 RBX=00000000ffffffff RCX=ffffffff812e0423 RDX=1ffff11001fd9195 RSI=0000000000000004 RDI=ffff88800fec8800 RBP=ffff88800fec8880 RSP=ffff888016cd7b70 R8 =0000000000000000 R9 =ffffed1001fd91ca R10=ffff88800fec8e53 R11=0000000000000001 R12=ffff88800fec8800 R13=ffff8880159de500 R14=ffff888016cd7c48 R15=0000000000000053 RIP=ffffffff83653a84 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 00007fa06bfa9900 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=00007fa06c55e650 CR3=000000000e296000 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