syzkaller login: [ 31.133780] BUG: Bad rss-counter state mm:000000007791c2b4 type:MM_FILEPAGES val:33 [ 31.135079] BUG: Bad rss-counter state mm:000000007791c2b4 type:MM_ANONPAGES val:22 [ 31.187510] ================================================================== [ 31.188365] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.189279] Read of size 8 at addr ffff8880162f7058 by task sshd/221 [ 31.190039] [ 31.190257] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.191232] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.192159] Call Trace: [ 31.192492] [ 31.192792] dump_stack_lvl+0x91/0xf0 [ 31.193270] print_report+0xcc/0x620 [ 31.193742] ? __virt_addr_valid+0x102/0x340 [ 31.194292] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.194894] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.195504] kasan_report+0xbe/0xf0 [ 31.195976] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.196600] vma_interval_tree_remove+0xc75/0xec0 [ 31.197200] vma_prepare+0xc54/0x11a0 [ 31.197677] __split_vma+0x5af/0x950 [ 31.198140] ? __pfx___split_vma+0x10/0x10 [ 31.198664] ? find_held_lock+0x2c/0x110 [ 31.199178] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.199741] ? lock_is_held_type+0x9f/0x120 [ 31.200284] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.200920] ? mtree_range_walk+0x632/0x900 [ 31.201479] ? mas_walk+0x5c7/0x7c0 [ 31.201953] do_vmi_munmap+0x1f1/0x2b0 [ 31.202439] mmap_region+0x1f9/0x2660 [ 31.202922] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.203423] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.204125] ? __pfx_lock_acquire+0x10/0x10 [ 31.204679] ? __pfx_mmap_region+0x10/0x10 [ 31.205209] ? security_mmap_addr+0x7d/0xa0 [ 31.205741] ? get_unmapped_area+0x1f5/0x3f0 [ 31.206283] do_mmap+0x854/0xf00 [ 31.206721] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.207216] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.207770] ksys_mmap_pgoff+0x3af/0x500 [ 31.208268] do_syscall_64+0x3f/0x90 [ 31.208759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.209410] RIP: 0033:0x7fe83ae94d82 [ 31.209863] 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 [ 31.211940] RSP: 002b:00007ffc2740b328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.212845] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe83ae94d82 [ 31.213696] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe83a2ce000 [ 31.214531] RBP: 00007fe83a2ce000 R08: 0000000000000009 R09: 0000000000001000 [ 31.215371] R10: 0000000000000812 R11: 0000000000000206 R12: 000055788c26bd90 [ 31.216213] R13: 00007ffc2740b340 R14: 00007ffc2740b370 R15: 00007ffc2740b6d0 [ 31.217065] [ 31.217354] [ 31.217567] Allocated by task 214: [ 31.217988] kasan_save_stack+0x22/0x50 [ 31.218486] kasan_set_track+0x25/0x30 [ 31.218971] __kasan_slab_alloc+0x59/0x70 [ 31.219486] kmem_cache_alloc+0x16b/0x370 [ 31.219996] vm_area_dup+0x20/0x160 [ 31.220452] __split_vma+0x170/0x950 [ 31.220935] split_vma+0xc6/0x110 [ 31.221366] mprotect_fixup+0x8d2/0xb30 [ 31.221868] do_mprotect_pkey+0x87e/0xd40 [ 31.222387] __x64_sys_mprotect+0x78/0xc0 [ 31.222905] do_syscall_64+0x3f/0x90 [ 31.223369] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.224006] [ 31.224221] Freed by task 214: [ 31.224622] kasan_save_stack+0x22/0x50 [ 31.225126] kasan_set_track+0x25/0x30 [ 31.225620] kasan_save_free_info+0x2b/0x50 [ 31.226148] __kasan_slab_free+0x10a/0x190 [ 31.226679] kmem_cache_free+0x10d/0x4d0 [ 31.227184] rcu_core+0x8c8/0x2860 [ 31.227628] __do_softirq+0x1b7/0x7d4 [ 31.228102] [ 31.228317] Last potentially related work creation: [ 31.228920] kasan_save_stack+0x22/0x50 [ 31.229426] __kasan_record_aux_stack+0x8e/0xa0 [ 31.230002] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.230643] remove_vma+0x139/0x170 [ 31.231089] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.231632] do_vmi_munmap+0x1f1/0x2b0 [ 31.232166] __vm_munmap+0x138/0x3a0 [ 31.232630] __x64_sys_munmap+0x59/0x80 [ 31.233129] do_syscall_64+0x3f/0x90 [ 31.233600] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.234233] [ 31.234441] The buggy address belongs to the object at ffff8880162f7000 [ 31.234441] which belongs to the cache vm_area_struct of size 168 [ 31.235902] The buggy address is located 88 bytes inside of [ 31.235902] freed 168-byte region [ffff8880162f7000, ffff8880162f70a8) [ 31.237316] [ 31.237527] The buggy address belongs to the physical page: [ 31.238180] page:00000000908cefdd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x162f7 [ 31.239270] memcg:ffff88800d48db01 [ 31.239689] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.240327] page_type: 0xffffffff() [ 31.240785] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.241698] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d48db01 [ 31.242594] page dumped because: kasan: bad access detected [ 31.243242] [ 31.243459] Memory state around the buggy address: [ 31.244026] ffff8880162f6f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.244890] ffff8880162f6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.245733] >ffff8880162f7000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.246571] ^ [ 31.247288] ffff8880162f7080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.248134] ffff8880162f7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.248991] ================================================================== [ 31.249903] Disabling lock debugging due to kernel taint [ 33.414635] BUG: Bad rss-counter state mm:00000000d3e66870 type:MM_FILEPAGES val:33 [ 33.415593] BUG: Bad rss-counter state mm:00000000d3e66870 type:MM_ANONPAGES val:22 [ 33.932142] BUG: Bad rss-counter state mm:000000000120aac2 type:MM_FILEPAGES val:33 [ 33.933346] BUG: Bad rss-counter state mm:000000000120aac2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4491' (ECDSA) to the list of known hosts. 2023/06/20 22:44:03 fuzzer started 2023/06/20 22:44:03 dialing manager at localhost:36067 2023/06/20 22:44:03 checking machine... 2023/06/20 22:44:03 checking revisions... [ 34.552508] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:44:03 testing simple program... [ 34.610517] cgroup: Unknown subsys name 'net' [ 34.659720] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:44:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000000003f9 RCX=0000000000000000 RDX=00000000000003f9 RSI=ffffffff825054a5 RDI=ffffffff87f6f0a0 RBP=ffffffff87f6f060 RSP=ffff88806ce09cb8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000004 R11=0000001707965f4c R12=0000000000000000 R13=ffffffff87f6f13c R14=0000000000000005 R15=0000000000000246 RIP=ffffffff825054fd RFL=00000006 [-----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=00007fea84e30f10 CR3=0000000019bf4000 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=2032303a34343a3232203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a34343a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000003 RCX=0000000000000000 RDX=ffff888015bcb680 RSI=ffffffff811431df RDI=0000000000000006 RBP=000000001c9e31b0 RSP=ffff8880168cf6f8 R8 =0000000000000006 R9 =0000000000000003 R10=0000000000080000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000800 R14=ffffffff8366b8df R15=0000000000000000 RIP=ffffffff814c0860 RFL=00000256 [---ZAP-] 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 00007f6a30802900 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=00007ffe4e427000 CR3=0000000015b16000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000