syzkaller login: [ 46.056610] BUG: Bad rss-counter state mm:00000000d799c2bf type:MM_FILEPAGES val:33 [ 46.058080] BUG: Bad rss-counter state mm:00000000d799c2bf type:MM_ANONPAGES val:22 [ 46.205035] ================================================================== [ 46.205982] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.206993] Read of size 8 at addr ffff8880164286b0 by task sshd/220 [ 46.207804] [ 46.208026] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.209145] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.210166] Call Trace: [ 46.210501] [ 46.210824] dump_stack_lvl+0x91/0xf0 [ 46.211334] print_report+0xcc/0x620 [ 46.211849] ? __virt_addr_valid+0x102/0x340 [ 46.212440] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.213086] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.213737] kasan_report+0xbe/0xf0 [ 46.214227] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.214871] vma_interval_tree_remove+0xc75/0xec0 [ 46.215499] vma_prepare+0xc54/0x11a0 [ 46.215993] __split_vma+0x5af/0x950 [ 46.216499] ? __pfx___split_vma+0x10/0x10 [ 46.217050] ? find_held_lock+0x2c/0x110 [ 46.217592] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.218177] ? lock_is_held_type+0x9f/0x120 [ 46.218732] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.219387] ? mtree_range_walk+0x632/0x900 [ 46.219964] ? mas_walk+0x5c7/0x7c0 [ 46.220459] do_vmi_munmap+0x1f1/0x2b0 [ 46.220970] mmap_region+0x1f9/0x2660 [ 46.221477] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.222018] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.222771] ? __pfx_lock_acquire+0x10/0x10 [ 46.223326] ? __pfx_mmap_region+0x10/0x10 [ 46.223876] ? security_mmap_addr+0x7d/0xa0 [ 46.224442] ? get_unmapped_area+0x1f5/0x3f0 [ 46.225013] do_mmap+0x854/0xf00 [ 46.225472] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.225980] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.226553] ksys_mmap_pgoff+0x3af/0x500 [ 46.227076] do_syscall_64+0x3f/0x90 [ 46.227576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.228254] RIP: 0033:0x7f994e680d82 [ 46.228733] 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 [ 46.230968] RSP: 002b:00007fff18ecb9a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.231919] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f994e680d82 [ 46.232804] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f994daba000 [ 46.233692] RBP: 00007f994daba000 R08: 0000000000000009 R09: 0000000000001000 [ 46.234585] R10: 0000000000000812 R11: 0000000000000206 R12: 000055928f680b20 [ 46.235468] R13: 00007fff18ecb9c0 R14: 00007fff18ecb9f0 R15: 00007fff18ecbd50 [ 46.236375] [ 46.236680] [ 46.236898] Allocated by task 213: [ 46.237345] kasan_save_stack+0x22/0x50 [ 46.237873] kasan_set_track+0x25/0x30 [ 46.238388] __kasan_slab_alloc+0x59/0x70 [ 46.238942] kmem_cache_alloc+0x16b/0x370 [ 46.239492] vm_area_dup+0x20/0x160 [ 46.239967] __split_vma+0x170/0x950 [ 46.240467] split_vma+0xc6/0x110 [ 46.240923] mprotect_fixup+0x8d2/0xb30 [ 46.241437] do_mprotect_pkey+0x87e/0xd40 [ 46.241980] __x64_sys_mprotect+0x78/0xc0 [ 46.242518] do_syscall_64+0x3f/0x90 [ 46.243011] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.243678] [ 46.243897] Freed by task 19: [ 46.244306] kasan_save_stack+0x22/0x50 [ 46.244831] kasan_set_track+0x25/0x30 [ 46.245346] kasan_save_free_info+0x2b/0x50 [ 46.245898] __kasan_slab_free+0x10a/0x190 [ 46.246450] kmem_cache_free+0x10d/0x4d0 [ 46.246983] rcu_core+0x8c8/0x2860 [ 46.247442] __do_softirq+0x1b7/0x7d4 [ 46.247935] [ 46.248160] Last potentially related work creation: [ 46.248780] kasan_save_stack+0x22/0x50 [ 46.249311] __kasan_record_aux_stack+0x8e/0xa0 [ 46.249901] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.250568] remove_vma+0x139/0x170 [ 46.251037] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.251626] do_vmi_munmap+0x1f1/0x2b0 [ 46.252147] __vm_munmap+0x138/0x3a0 [ 46.252633] __x64_sys_munmap+0x59/0x80 [ 46.253136] do_syscall_64+0x3f/0x90 [ 46.253638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.254320] [ 46.254538] The buggy address belongs to the object at ffff888016428658 [ 46.254538] which belongs to the cache vm_area_struct of size 168 [ 46.256063] The buggy address is located 88 bytes inside of [ 46.256063] freed 168-byte region [ffff888016428658, ffff888016428700) [ 46.257532] [ 46.257758] The buggy address belongs to the physical page: [ 46.258426] page:00000000f50a3dac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16428 [ 46.259541] memcg:ffff888014625e01 [ 46.259979] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.260664] page_type: 0xffffffff() [ 46.261130] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 46.262090] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014625e01 [ 46.263036] page dumped because: kasan: bad access detected [ 46.263735] [ 46.263961] Memory state around the buggy address: [ 46.264582] ffff888016428580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 46.265478] ffff888016428600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 46.266367] >ffff888016428680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.267248] ^ [ 46.267855] ffff888016428700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 46.268750] ffff888016428780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 46.269613] ================================================================== [ 46.270586] Disabling lock debugging due to kernel taint [ 48.276329] BUG: Bad rss-counter state mm:000000007c372ceb type:MM_FILEPAGES val:33 [ 48.277518] BUG: Bad rss-counter state mm:000000007c372ceb type:MM_ANONPAGES val:22 [ 48.742026] BUG: Bad rss-counter state mm:00000000ef4ff32b type:MM_FILEPAGES val:33 [ 48.743477] BUG: Bad rss-counter state mm:00000000ef4ff32b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15297' (ECDSA) to the list of known hosts. 2023/06/19 17:21:01 fuzzer started 2023/06/19 17:21:01 dialing manager at localhost:44161 2023/06/19 17:21:01 checking machine... 2023/06/19 17:21:01 checking revisions... [ 49.478678] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:21:01 testing simple program... [ 49.517633] cgroup: Unknown subsys name 'net' [ 49.578459] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:20:46 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f91c5ab1650 CR3=000000000fe1c000 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=31323a3731203931206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732030303a3132 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303338 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888014727288 RCX=0000000000000001 RDX=1ffff110028e4e53 RSI=ffff888014727f18 RDI=ffff888014727298 RBP=ffff888014727f18 RSP=ffff8880147271e0 R8 =0000000000000001 R9 =ffff8880147272c8 R10=0000000000038001 R11=000000000008ab99 R12=0000000000000008 R13=ffff888014720000 R14=ffff888014727f18 R15=ffff888014727288 RIP=ffffffff8113046e 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 00007f8724ef3900 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=00007f872434e8f0 CR3=000000000d89e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=b330640931bf210300000000000ae988 XMM05=bbf5188d74a2b77000000000001358a8 XMM06=4fda316b135da52b0000000000134698 XMM07=fb795ef6d65770560000000000124c18 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000