[ 34.120794] BUG: Bad rss-counter state mm:00000000720a32ab type:MM_FILEPAGES val:33 [ 34.122569] BUG: Bad rss-counter state mm:00000000720a32ab type:MM_ANONPAGES val:22 [ 34.165476] ================================================================== [ 34.166539] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.167518] Read of size 8 at addr ffff88800de41a50 by task sshd/220 [ 34.168286] [ 34.168546] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.169416] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.170415] Call Trace: [ 34.170737] [ 34.171032] dump_stack_lvl+0x91/0xf0 [ 34.171534] print_report+0xcc/0x620 [ 34.172014] ? __virt_addr_valid+0x102/0x340 [ 34.172572] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.173190] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.173827] kasan_report+0xbe/0xf0 [ 34.174304] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.174949] vma_interval_tree_remove+0xc75/0xec0 [ 34.175564] vma_prepare+0xc54/0x11a0 [ 34.176044] __split_vma+0x5af/0x950 [ 34.176525] ? __pfx___split_vma+0x10/0x10 [ 34.177051] ? find_held_lock+0x2c/0x110 [ 34.177596] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.178164] ? lock_is_held_type+0x9f/0x120 [ 34.178718] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.179356] ? mtree_range_walk+0x632/0x900 [ 34.179921] ? mas_walk+0x5c7/0x7c0 [ 34.180400] do_vmi_munmap+0x1f1/0x2b0 [ 34.180903] mmap_region+0x1f9/0x2660 [ 34.181383] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.181911] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.182650] ? __pfx_lock_acquire+0x10/0x10 [ 34.183200] ? __pfx_mmap_region+0x10/0x10 [ 34.183745] ? security_mmap_addr+0x7d/0xa0 [ 34.184272] ? get_unmapped_area+0x1f5/0x3f0 [ 34.184834] do_mmap+0x854/0xf00 [ 34.185279] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.185784] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.186347] ksys_mmap_pgoff+0x3af/0x500 [ 34.186885] do_syscall_64+0x3f/0x90 [ 34.187365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.188037] RIP: 0033:0x7fc429fdcd82 [ 34.188512] 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 [ 34.190673] RSP: 002b:00007ffc5d253238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.191617] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc429fdcd82 [ 34.192486] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc429416000 [ 34.193329] RBP: 00007fc429416000 R08: 0000000000000009 R09: 0000000000001000 [ 34.194208] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557077a74980 [ 34.195159] R13: 00007ffc5d253250 R14: 00007ffc5d253280 R15: 00007ffc5d2535e0 [ 34.196020] [ 34.196311] [ 34.196536] Allocated by task 212: [ 34.196967] kasan_save_stack+0x22/0x50 [ 34.197497] kasan_set_track+0x25/0x30 [ 34.198000] __kasan_slab_alloc+0x59/0x70 [ 34.198536] kmem_cache_alloc+0x16b/0x370 [ 34.199062] vm_area_dup+0x20/0x160 [ 34.199528] __split_vma+0x170/0x950 [ 34.199998] split_vma+0xc6/0x110 [ 34.200445] mprotect_fixup+0x8d2/0xb30 [ 34.200948] do_mprotect_pkey+0x87e/0xd40 [ 34.201485] __x64_sys_mprotect+0x78/0xc0 [ 34.202009] do_syscall_64+0x3f/0x90 [ 34.202506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.203173] [ 34.203391] Freed by task 19: [ 34.203788] kasan_save_stack+0x22/0x50 [ 34.204291] kasan_set_track+0x25/0x30 [ 34.204794] kasan_save_free_info+0x2b/0x50 [ 34.205328] __kasan_slab_free+0x10a/0x190 [ 34.205869] kmem_cache_free+0x10d/0x4d0 [ 34.206376] rcu_core+0x8c8/0x2860 [ 34.206859] __do_softirq+0x1b7/0x7d4 [ 34.207343] [ 34.207577] Last potentially related work creation: [ 34.208168] kasan_save_stack+0x22/0x50 [ 34.208680] __kasan_record_aux_stack+0x8e/0xa0 [ 34.209249] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.209897] remove_vma+0x139/0x170 [ 34.210345] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.210933] do_vmi_munmap+0x1f1/0x2b0 [ 34.211435] __vm_munmap+0x138/0x3a0 [ 34.211906] __x64_sys_munmap+0x59/0x80 [ 34.212410] do_syscall_64+0x3f/0x90 [ 34.212888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.213540] [ 34.213755] Second to last potentially related work creation: [ 34.214446] kasan_save_stack+0x22/0x50 [ 34.214969] __kasan_record_aux_stack+0x8e/0xa0 [ 34.215565] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.216218] remove_vma+0x139/0x170 [ 34.216681] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.217239] do_vmi_munmap+0x1f1/0x2b0 [ 34.217735] mmap_region+0x1f9/0x2660 [ 34.218217] do_mmap+0x854/0xf00 [ 34.218657] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.219163] ksys_mmap_pgoff+0x3af/0x500 [ 34.219688] do_syscall_64+0x3f/0x90 [ 34.220164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.220824] [ 34.221041] The buggy address belongs to the object at ffff88800de419f8 [ 34.221041] which belongs to the cache vm_area_struct of size 168 [ 34.222520] The buggy address is located 88 bytes inside of [ 34.222520] freed 168-byte region [ffff88800de419f8, ffff88800de41aa0) [ 34.224075] [ 34.224354] The buggy address belongs to the physical page: [ 34.225173] page:000000001d56b998 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde41 [ 34.226539] memcg:ffff88800e096701 [ 34.227124] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.227931] page_type: 0xffffffff() [ 34.228502] raw: 0100000000000200 ffff88800879fc80 ffffea0000379440 dead000000000008 [ 34.229604] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e096701 [ 34.230522] page dumped because: kasan: bad access detected [ 34.231194] [ 34.231414] Memory state around the buggy address: [ 34.231993] ffff88800de41900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.232876] ffff88800de41980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 34.233744] >ffff88800de41a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.234616] ^ [ 34.235348] ffff88800de41a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 34.236224] ffff88800de41b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.237094] ================================================================== [ 34.238250] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.167319] BUG: Bad rss-counter state mm:00000000be3ae89a type:MM_FILEPAGES val:33 [ 36.168463] BUG: Bad rss-counter state mm:00000000be3ae89a type:MM_ANONPAGES val:22 [ 36.697289] BUG: Bad rss-counter state mm:0000000099b7d63c type:MM_FILEPAGES val:33 [ 36.698454] BUG: Bad rss-counter state mm:0000000099b7d63c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27389' (ECDSA) to the list of known hosts. 2023/06/19 14:28:34 fuzzer started 2023/06/19 14:28:34 dialing manager at localhost:44161 2023/06/19 14:28:34 checking machine... 2023/06/19 14:28:34 checking revisions... [ 37.339526] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:28:34 testing simple program... [ 37.394645] cgroup: Unknown subsys name 'net' [ 37.431553] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:28:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000004 RCX=0000000000000000 RDX=ffff88800c69b680 RSI=0000000000000008 RDI=ffff88801691d780 RBP=0000000000000008 RSP=ffff88800949f348 R8 =0000000000000004 R9 =0000000000000008 R10=0000000000000ea8 R11=00000000000b6996 R12=ffff88801691d780 R13=0000000000000001 R14=ffff88800949f420 R15=0000000000000ea8 RIP=ffffffff822469c2 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 00007f19e3dd4900 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=00007ffc6f48b000 CR3=0000000009a3a000 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=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 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=0000000000000001 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=00007f921db78e10 CR3=0000000009e48000 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=2033333a38323a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a38323a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000