syzkaller login: [ 60.956913] BUG: Bad rss-counter state mm:00000000fb13075b type:MM_FILEPAGES val:33 [ 60.959627] BUG: Bad rss-counter state mm:00000000fb13075b type:MM_ANONPAGES val:22 [ 61.120387] ================================================================== [ 61.121385] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.122355] Read of size 8 at addr ffff88800e2aa4e0 by task sshd/220 [ 61.123317] [ 61.123538] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 61.124426] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.125427] Call Trace: [ 61.125753] [ 61.126046] dump_stack_lvl+0x91/0xf0 [ 61.126548] print_report+0xcc/0x620 [ 61.127035] ? __virt_addr_valid+0x102/0x340 [ 61.127594] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.128234] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.128862] kasan_report+0xbe/0xf0 [ 61.129355] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.129979] vma_interval_tree_remove+0xc75/0xec0 [ 61.130616] vma_prepare+0xc54/0x11a0 [ 61.131120] __split_vma+0x5af/0x950 [ 61.131616] ? __pfx___split_vma+0x10/0x10 [ 61.132196] ? find_held_lock+0x2c/0x110 [ 61.132739] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.133331] ? lock_is_held_type+0x9f/0x120 [ 61.133895] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.134539] ? mtree_range_walk+0x632/0x900 [ 61.135113] ? mas_walk+0x5c7/0x7c0 [ 61.135615] do_vmi_munmap+0x1f1/0x2b0 [ 61.136146] mmap_region+0x1f9/0x2660 [ 61.136647] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.137184] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.137932] ? __pfx_lock_acquire+0x10/0x10 [ 61.138487] ? __pfx_mmap_region+0x10/0x10 [ 61.139047] ? security_mmap_addr+0x7d/0xa0 [ 61.139604] ? get_unmapped_area+0x1f5/0x3f0 [ 61.140193] do_mmap+0x854/0xf00 [ 61.140655] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.141173] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.141763] ksys_mmap_pgoff+0x3af/0x500 [ 61.142293] do_syscall_64+0x3f/0x90 [ 61.142793] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.143462] RIP: 0033:0x7f25837e6d82 [ 61.143947] 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 [ 61.146171] RSP: 002b:00007ffd2ef6ca08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.147121] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f25837e6d82 [ 61.148021] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2582c20000 [ 61.148911] RBP: 00007f2582c20000 R08: 0000000000000009 R09: 0000000000001000 [ 61.149800] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f5142ecec0 [ 61.150685] R13: 00007ffd2ef6ca20 R14: 00007ffd2ef6ca50 R15: 00007ffd2ef6cdb0 [ 61.151583] [ 61.151902] [ 61.152130] Allocated by task 213: [ 61.152574] kasan_save_stack+0x22/0x50 [ 61.153104] kasan_set_track+0x25/0x30 [ 61.153623] __kasan_slab_alloc+0x59/0x70 [ 61.154179] kmem_cache_alloc+0x16b/0x370 [ 61.154728] vm_area_dup+0x20/0x160 [ 61.155207] __split_vma+0x170/0x950 [ 61.155692] split_vma+0xc6/0x110 [ 61.156157] mprotect_fixup+0x8d2/0xb30 [ 61.156679] do_mprotect_pkey+0x87e/0xd40 [ 61.157229] __x64_sys_mprotect+0x78/0xc0 [ 61.157770] do_syscall_64+0x3f/0x90 [ 61.158266] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.158932] [ 61.159161] Freed by task 213: [ 61.159571] kasan_save_stack+0x22/0x50 [ 61.160114] kasan_set_track+0x25/0x30 [ 61.160630] kasan_save_free_info+0x2b/0x50 [ 61.161183] __kasan_slab_free+0x10a/0x190 [ 61.161742] kmem_cache_free+0x10d/0x4d0 [ 61.162271] rcu_core+0x8c8/0x2860 [ 61.162732] __do_softirq+0x1b7/0x7d4 [ 61.163227] [ 61.163455] Last potentially related work creation: [ 61.164080] kasan_save_stack+0x22/0x50 [ 61.164677] __kasan_record_aux_stack+0x8e/0xa0 [ 61.165251] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.165897] remove_vma+0x139/0x170 [ 61.166356] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.166918] do_vmi_munmap+0x1f1/0x2b0 [ 61.167403] __vm_munmap+0x138/0x3a0 [ 61.167879] __x64_sys_munmap+0x59/0x80 [ 61.168381] do_syscall_64+0x3f/0x90 [ 61.168859] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.169502] [ 61.169724] Second to last potentially related work creation: [ 61.170404] kasan_save_stack+0x22/0x50 [ 61.170909] __kasan_record_aux_stack+0x8e/0xa0 [ 61.171482] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.172148] remove_vma+0x139/0x170 [ 61.172608] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.173173] do_vmi_munmap+0x1f1/0x2b0 [ 61.173661] mmap_region+0x1f9/0x2660 [ 61.174146] do_mmap+0x854/0xf00 [ 61.174587] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.175082] ksys_mmap_pgoff+0x3af/0x500 [ 61.175587] do_syscall_64+0x3f/0x90 [ 61.176069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.176714] [ 61.176930] The buggy address belongs to the object at ffff88800e2aa488 [ 61.176930] which belongs to the cache vm_area_struct of size 168 [ 61.178413] The buggy address is located 88 bytes inside of [ 61.178413] freed 168-byte region [ffff88800e2aa488, ffff88800e2aa530) [ 61.179871] [ 61.180098] The buggy address belongs to the physical page: [ 61.180768] page:00000000a7032a13 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2aa [ 61.181889] memcg:ffff88800e390a01 [ 61.182331] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 61.183056] page_type: 0xffffffff() [ 61.183513] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 61.184486] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e390a01 [ 61.185406] page dumped because: kasan: bad access detected [ 61.186090] [ 61.186311] Memory state around the buggy address: [ 61.186914] ffff88800e2aa380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.187795] ffff88800e2aa400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 61.188693] >ffff88800e2aa480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.189581] ^ [ 61.190366] ffff88800e2aa500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 61.191253] ffff88800e2aa580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.192153] ================================================================== [ 61.193181] Disabling lock debugging due to kernel taint [ 62.563323] BUG: Bad rss-counter state mm:000000000e56a11c type:MM_FILEPAGES val:33 [ 62.563980] BUG: Bad rss-counter state mm:000000000e56a11c type:MM_ANONPAGES val:22 [ 62.926406] BUG: Bad rss-counter state mm:00000000dadd3712 type:MM_FILEPAGES val:33 [ 62.927119] BUG: Bad rss-counter state mm:00000000dadd3712 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53957' (ECDSA) to the list of known hosts. 2023/06/20 07:50:09 fuzzer started 2023/06/20 07:50:09 dialing manager at localhost:44161 2023/06/20 07:50:09 checking machine... 2023/06/20 07:50:09 checking revisions... [ 63.513832] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:50:09 testing simple program... [ 63.552790] cgroup: Unknown subsys name 'net' [ 63.605676] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:49:47 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff83ab4235 RDI=ffff88800cfa3a74 RBP=0000000000000000 RSP=ffff88801581f500 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000147400001474 R12=0000000000000000 R13=00000000000000fd R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff814c07f1 RFL=00000293 [--S-A-C] 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 00007f06e8869900 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=00007f06e8e20618 CR3=000000000e6d8000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fb862b5b510 CR3=000000000d5a0000 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=16ae123b4a8268bddf49749ae2fdd0a6 XMM02=2c67c8bc2e329bc3000000000011dd80 XMM03=fb795ef6d65770560000000000123f88 XMM04=bdf2cdc66d8f150f00000000000ae988 XMM05=c9cae38c2edb26070000000000135d78 XMM06=4fda316b135da52b0000000000134aa8 XMM07=e042d86d42eb936e0000000000124208 XMM08=9c5e83b56abea9d0000000000011dde0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000