[ 29.302164] BUG: Bad rss-counter state mm:000000002ab56aaa type:MM_FILEPAGES val:33 [ 29.302851] BUG: Bad rss-counter state mm:000000002ab56aaa type:MM_ANONPAGES val:22 [ 29.472039] ================================================================== [ 29.472643] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.473251] Read of size 8 at addr ffff88800e0664e0 by task sshd/219 [ 29.473756] [ 29.473900] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.474464] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.475095] Call Trace: [ 29.476631] [ 29.476831] dump_stack_lvl+0x91/0xf0 [ 29.477159] print_report+0xcc/0x620 [ 29.477481] ? __virt_addr_valid+0x102/0x340 [ 29.477896] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.478312] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.478814] kasan_report+0xbe/0xf0 [ 29.479138] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.479953] vma_interval_tree_remove+0xc75/0xec0 [ 29.480348] vma_prepare+0xc54/0x11a0 [ 29.480710] __split_vma+0x5af/0x950 [ 29.481018] ? __pfx___split_vma+0x10/0x10 [ 29.481360] ? find_held_lock+0x2c/0x110 [ 29.481748] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.482127] ? lock_is_held_type+0x9f/0x120 [ 29.482491] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.482947] ? mtree_range_walk+0x632/0x900 [ 29.483334] ? mas_walk+0x5c7/0x7c0 [ 29.483704] do_vmi_munmap+0x1f1/0x2b0 [ 29.484038] mmap_region+0x1f9/0x2660 [ 29.484365] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.485199] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.485728] ? __pfx_lock_acquire+0x10/0x10 [ 29.486082] ? __pfx_mmap_region+0x10/0x10 [ 29.486437] ? security_mmap_addr+0x7d/0xa0 [ 29.486836] ? get_unmapped_area+0x1f5/0x3f0 [ 29.487201] do_mmap+0x854/0xf00 [ 29.491550] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.491935] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.492312] ksys_mmap_pgoff+0x3af/0x500 [ 29.492743] do_syscall_64+0x3f/0x90 [ 29.493068] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.493501] RIP: 0033:0x7fcd5e7cbd82 [ 29.493857] 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 [ 29.495320] RSP: 002b:00007ffdf8df80a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.495970] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcd5e7cbd82 [ 29.496526] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcd5dc05000 [ 29.497127] RBP: 00007fcd5dc05000 R08: 0000000000000009 R09: 0000000000001000 [ 29.497764] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a16a516f70 [ 29.498319] R13: 00007ffdf8df80c0 R14: 00007ffdf8df80f0 R15: 00007ffdf8df8450 [ 29.498930] [ 29.499128] [ 29.499280] Allocated by task 212: [ 29.499628] kasan_save_stack+0x22/0x50 [ 29.499969] kasan_set_track+0x25/0x30 [ 29.500300] __kasan_slab_alloc+0x59/0x70 [ 29.500708] kmem_cache_alloc+0x16b/0x370 [ 29.501054] vm_area_dup+0x20/0x160 [ 29.501355] __split_vma+0x170/0x950 [ 29.501716] split_vma+0xc6/0x110 [ 29.502012] mprotect_fixup+0x8d2/0xb30 [ 29.502346] do_mprotect_pkey+0x87e/0xd40 [ 29.502907] __x64_sys_mprotect+0x78/0xc0 [ 29.503250] do_syscall_64+0x3f/0x90 [ 29.503678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.504101] [ 29.504242] Freed by task 212: [ 29.504501] kasan_save_stack+0x22/0x50 [ 29.504868] kasan_set_track+0x25/0x30 [ 29.505186] kasan_save_free_info+0x2b/0x50 [ 29.505533] __kasan_slab_free+0x10a/0x190 [ 29.505921] kmem_cache_free+0x10d/0x4d0 [ 29.506258] rcu_core+0x8c8/0x2860 [ 29.506555] __do_softirq+0x1b7/0x7d4 [ 29.506916] [ 29.507054] Last potentially related work creation: [ 29.507485] kasan_save_stack+0x22/0x50 [ 29.507883] __kasan_record_aux_stack+0x8e/0xa0 [ 29.508247] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.508706] remove_vma+0x139/0x170 [ 29.508997] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.509349] do_vmi_munmap+0x1f1/0x2b0 [ 29.509713] __vm_munmap+0x138/0x3a0 [ 29.510012] __x64_sys_munmap+0x59/0x80 [ 29.510325] do_syscall_64+0x3f/0x90 [ 29.510676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.511097] [ 29.511228] Second to last potentially related work creation: [ 29.511723] kasan_save_stack+0x22/0x50 [ 29.512026] __kasan_record_aux_stack+0x8e/0xa0 [ 29.512370] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.512829] remove_vma+0x139/0x170 [ 29.513098] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.513427] do_vmi_munmap+0x1f1/0x2b0 [ 29.513761] mmap_region+0x1f9/0x2660 [ 29.514045] do_mmap+0x854/0xf00 [ 29.514299] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.514629] ksys_mmap_pgoff+0x3af/0x500 [ 29.514927] do_syscall_64+0x3f/0x90 [ 29.515210] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.515654] [ 29.515784] The buggy address belongs to the object at ffff88800e066488 [ 29.515784] which belongs to the cache vm_area_struct of size 168 [ 29.516693] The buggy address is located 88 bytes inside of [ 29.516693] freed 168-byte region [ffff88800e066488, ffff88800e066530) [ 29.517525] [ 29.517738] The buggy address belongs to the physical page: [ 29.518131] page:00000000cc7b2f24 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe066 [ 29.518822] memcg:ffff88801004c901 [ 29.519071] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.519486] page_type: 0xffffffff() [ 29.519799] raw: 0100000000000200 ffff8880087a0c80 ffffea000037a600 dead000000000006 [ 29.520340] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801004c901 [ 29.520925] page dumped because: kasan: bad access detected [ 29.521313] [ 29.521446] Memory state around the buggy address: [ 29.521834] ffff88800e066380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 29.522484] ffff88800e066400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 29.522967] >ffff88800e066480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.523420] ^ [ 29.523891] ffff88800e066500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 29.524489] ffff88800e066580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.525069] ================================================================== [ 29.525917] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.589372] BUG: Bad rss-counter state mm:0000000069ffc5e5 type:MM_FILEPAGES val:33 [ 31.594815] BUG: Bad rss-counter state mm:0000000069ffc5e5 type:MM_ANONPAGES val:22 [ 32.274009] BUG: Bad rss-counter state mm:000000008d76202f type:MM_FILEPAGES val:33 [ 32.274881] BUG: Bad rss-counter state mm:000000008d76202f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30785' (ECDSA) to the list of known hosts. 2023/06/21 09:56:03 fuzzer started 2023/06/21 09:56:03 dialing manager at localhost:36067 2023/06/21 09:56:03 checking machine... 2023/06/21 09:56:03 checking revisions... [ 33.117941] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:56:04 testing simple program... [ 33.165541] cgroup: Unknown subsys name 'net' [ 33.232520] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:56:03 Registers: info registers vcpu 0 RAX=0000000000000020 RBX=00000000000003f8 RCX=0000000000000000 RDX=00000000000003f8 RSI=ffffffff825054a5 RDI=ffffffff87f6f0a0 RBP=ffffffff87f6f060 RSP=ffff88800f7bf980 R8 =0000000000000001 R9 =000000000000000a R10=0000000000000020 R11=000000003a475542 R12=0000000000000020 R13=ffffffff87f6f060 R14=0000000000000010 R15=ffffffff82505490 RIP=ffffffff825054fd RFL=00000002 [-------] 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=00007fa95e0a3328 CR3=0000000019870000 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=2033303a36353a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a36353a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85652c60 RCX=0000000000000000 RDX=ffff88800fa93680 RSI=ffffffff814c84af RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888019a3f4f8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007f716317d4bb R13=0000000000000000 R14=ffff88800fa93680 R15=0000000000000cc0 RIP=ffffffff814c84af 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 00007f7162cbe900 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=00007fc893912140 CR3=00000000194ba000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000