syzkaller login: [ 61.072773] BUG: Bad rss-counter state mm:0000000036dbb4c5 type:MM_FILEPAGES val:33 [ 61.074047] BUG: Bad rss-counter state mm:0000000036dbb4c5 type:MM_ANONPAGES val:22 [ 61.196521] ================================================================== [ 61.197545] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.198686] Read of size 8 at addr ffff88801478ab38 by task sshd/220 [ 61.199525] [ 61.199760] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.200677] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.201875] Call Trace: [ 61.202224] [ 61.202526] dump_stack_lvl+0x91/0xf0 [ 61.203049] print_report+0xcc/0x620 [ 61.203606] ? __virt_addr_valid+0x102/0x340 [ 61.204201] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.204857] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.205527] kasan_report+0xbe/0xf0 [ 61.206085] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.206761] vma_interval_tree_remove+0xc75/0xec0 [ 61.207435] vma_prepare+0xc54/0x11a0 [ 61.207951] __split_vma+0x5af/0x950 [ 61.208462] ? __pfx___split_vma+0x10/0x10 [ 61.209039] ? find_held_lock+0x2c/0x110 [ 61.209602] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.210253] ? lock_is_held_type+0x9f/0x120 [ 61.210842] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.211540] ? mtree_range_walk+0x632/0x900 [ 61.212137] ? mas_walk+0x5c7/0x7c0 [ 61.212652] do_vmi_munmap+0x1f1/0x2b0 [ 61.213185] mmap_region+0x1f9/0x2660 [ 61.213742] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.214302] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.215075] ? __pfx_lock_acquire+0x10/0x10 [ 61.215671] ? __pfx_mmap_region+0x10/0x10 [ 61.216251] ? security_mmap_addr+0x7d/0xa0 [ 61.216829] ? get_unmapped_area+0x1f5/0x3f0 [ 61.217423] do_mmap+0x854/0xf00 [ 61.217939] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.218479] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.219094] ksys_mmap_pgoff+0x3af/0x500 [ 61.219662] do_syscall_64+0x3f/0x90 [ 61.220188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.220887] RIP: 0033:0x7fb7efabcd82 [ 61.221390] 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 [ 61.223790] RSP: 002b:00007ffc9f376488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.224770] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb7efabcd82 [ 61.225713] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb7eeef6000 [ 61.226635] RBP: 00007fb7eeef6000 R08: 0000000000000009 R09: 0000000000001000 [ 61.227541] R10: 0000000000000812 R11: 0000000000000206 R12: 00005558897a2980 [ 61.228414] R13: 00007ffc9f3764a0 R14: 00007ffc9f3764d0 R15: 00007ffc9f376830 [ 61.229295] [ 61.229591] [ 61.229846] Allocated by task 213: [ 61.230293] kasan_save_stack+0x22/0x50 [ 61.230807] kasan_set_track+0x25/0x30 [ 61.231331] __kasan_slab_alloc+0x59/0x70 [ 61.231867] kmem_cache_alloc+0x16b/0x370 [ 61.232395] vm_area_dup+0x20/0x160 [ 61.232856] __split_vma+0x170/0x950 [ 61.233339] split_vma+0xc6/0x110 [ 61.233829] mprotect_fixup+0x8d2/0xb30 [ 61.234349] do_mprotect_pkey+0x87e/0xd40 [ 61.234884] __x64_sys_mprotect+0x78/0xc0 [ 61.235448] do_syscall_64+0x3f/0x90 [ 61.235932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.236592] [ 61.236816] Freed by task 213: [ 61.237219] kasan_save_stack+0x22/0x50 [ 61.237770] kasan_set_track+0x25/0x30 [ 61.238280] kasan_save_free_info+0x2b/0x50 [ 61.238825] __kasan_slab_free+0x10a/0x190 [ 61.239416] kmem_cache_free+0x10d/0x4d0 [ 61.239968] rcu_core+0x8c8/0x2860 [ 61.240452] __do_softirq+0x1b7/0x7d4 [ 61.240972] [ 61.241209] Last potentially related work creation: [ 61.241881] kasan_save_stack+0x22/0x50 [ 61.242424] __kasan_record_aux_stack+0x8e/0xa0 [ 61.243045] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.243756] remove_vma+0x139/0x170 [ 61.244232] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.244800] do_vmi_munmap+0x1f1/0x2b0 [ 61.245315] __vm_munmap+0x138/0x3a0 [ 61.245836] __x64_sys_munmap+0x59/0x80 [ 61.246354] do_syscall_64+0x3f/0x90 [ 61.246852] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.247529] [ 61.247748] Second to last potentially related work creation: [ 61.248475] kasan_save_stack+0x22/0x50 [ 61.248996] __kasan_record_aux_stack+0x8e/0xa0 [ 61.249608] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.250323] remove_vma+0x139/0x170 [ 61.250798] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.251397] do_vmi_munmap+0x1f1/0x2b0 [ 61.251907] mmap_region+0x1f9/0x2660 [ 61.252412] do_mmap+0x854/0xf00 [ 61.252865] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.253384] ksys_mmap_pgoff+0x3af/0x500 [ 61.253952] do_syscall_64+0x3f/0x90 [ 61.254459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.255135] [ 61.255391] The buggy address belongs to the object at ffff88801478aae0 [ 61.255391] which belongs to the cache vm_area_struct of size 168 [ 61.256971] The buggy address is located 88 bytes inside of [ 61.256971] freed 168-byte region [ffff88801478aae0, ffff88801478ab88) [ 61.258499] [ 61.258733] The buggy address belongs to the physical page: [ 61.259462] page:0000000054835f75 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1478a [ 61.260630] memcg:ffff88800f74ed01 [ 61.261099] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.261788] page_type: 0xffffffff() [ 61.262260] raw: 0100000000000200 ffff8880087a0c80 ffffea00003aca00 dead000000000008 [ 61.263258] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f74ed01 [ 61.264228] page dumped because: kasan: bad access detected [ 61.264969] [ 61.265194] Memory state around the buggy address: [ 61.265803] ffff88801478aa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.266737] ffff88801478aa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 61.267661] >ffff88801478ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.268570] ^ [ 61.269244] ffff88801478ab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 61.270147] ffff88801478ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 61.271063] ================================================================== [ 61.272277] Disabling lock debugging due to kernel taint [ 63.085609] BUG: Bad rss-counter state mm:00000000c80400c6 type:MM_FILEPAGES val:33 [ 63.086324] BUG: Bad rss-counter state mm:00000000c80400c6 type:MM_ANONPAGES val:22 [ 63.478681] BUG: Bad rss-counter state mm:00000000a1dc921a type:MM_FILEPAGES val:33 [ 63.479341] BUG: Bad rss-counter state mm:00000000a1dc921a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10759' (ECDSA) to the list of known hosts. 2023/06/20 18:05:56 fuzzer started 2023/06/20 18:05:56 dialing manager at localhost:36067 2023/06/20 18:05:56 checking machine... 2023/06/20 18:05:56 checking revisions... [ 64.095203] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:05:56 testing simple program... [ 64.144610] cgroup: Unknown subsys name 'net' [ 64.195851] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:05:56 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88801a2116c0 RCX=ffff88801a2116c0 RDX=0000000000120012 RSI=ffff88801a2116c0 RDI=ffff8880087a0dc0 RBP=ffff88800e53fc88 RSP=ffff88800e53fbf0 R8 =0000000080120011 R9 =0000000000000000 R10=ffffea0000688440 R11=000000008011000f R12=ffffea0000688440 R13=0000000000000000 R14=0000000000120011 R15=ffff8880087a0dc0 RIP=ffffffff81809672 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 00007f6d97e37900 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=00007ffd3b6d6000 CR3=000000000f690000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fc1ce958cc8 CR3=000000000d6a4000 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=b7c23c38e6390bba0548489cefd16b21 XMM02=ec2efd57dc4c00df000000000011b4d0 XMM03=5ea1202e48599136000000000011b5a0 XMM04=01373944d280258c00000000000ae988 XMM05=47e4be856d06f7f50000000000133e88 XMM06=4fda316b135da52b0000000000132f28 XMM07=e042d86d42eb936e00000000001220f8 XMM08=5ea1202e48599136000000000011b5a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000