[ 30.393808] BUG: Bad rss-counter state mm:000000007f33ed58 type:MM_FILEPAGES val:33 [ 30.394524] BUG: Bad rss-counter state mm:000000007f33ed58 type:MM_ANONPAGES val:22 [ 30.563764] ================================================================== [ 30.564406] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.565029] Read of size 8 at addr ffff88800c5083f8 by task sshd/221 [ 30.565507] [ 30.565647] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.567150] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.568309] Call Trace: [ 30.568515] [ 30.568704] dump_stack_lvl+0x91/0xf0 [ 30.569097] print_report+0xcc/0x620 [ 30.569408] ? __virt_addr_valid+0x102/0x340 [ 30.569786] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.570291] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.570685] kasan_report+0xbe/0xf0 [ 30.571105] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.571497] vma_interval_tree_remove+0xc75/0xec0 [ 30.571944] vma_prepare+0xc54/0x11a0 [ 30.572278] __split_vma+0x5af/0x950 [ 30.572579] ? __pfx___split_vma+0x10/0x10 [ 30.572965] ? find_held_lock+0x2c/0x110 [ 30.573299] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.573654] ? lock_is_held_type+0x9f/0x120 [ 30.574288] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.574679] ? mtree_range_walk+0x632/0x900 [ 30.575079] ? mas_walk+0x5c7/0x7c0 [ 30.575373] do_vmi_munmap+0x1f1/0x2b0 [ 30.575662] mmap_region+0x1f9/0x2660 [ 30.576029] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.576355] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.576816] ? __pfx_lock_acquire+0x10/0x10 [ 30.577232] ? __pfx_mmap_region+0x10/0x10 [ 30.577566] ? security_mmap_addr+0x7d/0xa0 [ 30.577983] ? get_unmapped_area+0x1f5/0x3f0 [ 30.578356] do_mmap+0x854/0xf00 [ 30.578634] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.579029] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.579383] ksys_mmap_pgoff+0x3af/0x500 [ 30.579705] do_syscall_64+0x3f/0x90 [ 30.580104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.580515] RIP: 0033:0x7f12395d9d82 [ 30.580811] 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 [ 30.582413] RSP: 002b:00007ffe1165dc48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.583059] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f12395d9d82 [ 30.583584] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1238a13000 [ 30.584200] RBP: 00007f1238a13000 R08: 0000000000000009 R09: 0000000000001000 [ 30.584731] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d405d9fb20 [ 30.585334] R13: 00007ffe1165dc60 R14: 00007ffe1165dc90 R15: 00007ffe1165dff0 [ 30.585967] [ 30.586224] [ 30.586363] Allocated by task 211: [ 30.586637] kasan_save_stack+0x22/0x50 [ 30.587034] kasan_set_track+0x25/0x30 [ 30.587348] __kasan_slab_alloc+0x59/0x70 [ 30.587680] kmem_cache_alloc+0x16b/0x370 [ 30.588091] vm_area_dup+0x20/0x160 [ 30.588386] __split_vma+0x170/0x950 [ 30.588681] split_vma+0xc6/0x110 [ 30.589036] mprotect_fixup+0x8d2/0xb30 [ 30.589351] do_mprotect_pkey+0x87e/0xd40 [ 30.589680] __x64_sys_mprotect+0x78/0xc0 [ 30.590219] do_syscall_64+0x3f/0x90 [ 30.590540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.591023] [ 30.591162] Freed by task 211: [ 30.591410] kasan_save_stack+0x22/0x50 [ 30.591732] kasan_set_track+0x25/0x30 [ 30.592116] kasan_save_free_info+0x2b/0x50 [ 30.592454] __kasan_slab_free+0x10a/0x190 [ 30.592794] kmem_cache_free+0x10d/0x4d0 [ 30.593175] rcu_core+0x8c8/0x2860 [ 30.593462] __do_softirq+0x1b7/0x7d4 [ 30.593768] [ 30.593998] Last potentially related work creation: [ 30.594383] kasan_save_stack+0x22/0x50 [ 30.594704] __kasan_record_aux_stack+0x8e/0xa0 [ 30.595151] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.595565] remove_vma+0x139/0x170 [ 30.595930] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.596290] do_vmi_munmap+0x1f1/0x2b0 [ 30.596600] __vm_munmap+0x138/0x3a0 [ 30.596946] __x64_sys_munmap+0x59/0x80 [ 30.597274] do_syscall_64+0x3f/0x90 [ 30.597580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.598096] [ 30.598235] Second to last potentially related work creation: [ 30.598670] kasan_save_stack+0x22/0x50 [ 30.599082] __kasan_record_aux_stack+0x8e/0xa0 [ 30.599464] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.599954] remove_vma+0x139/0x170 [ 30.600254] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.600618] do_vmi_munmap+0x1f1/0x2b0 [ 30.601037] mmap_region+0x1f9/0x2660 [ 30.601365] do_mmap+0x854/0xf00 [ 30.601642] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.602060] ksys_mmap_pgoff+0x3af/0x500 [ 30.602406] do_syscall_64+0x3f/0x90 [ 30.602709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.603214] [ 30.603355] The buggy address belongs to the object at ffff88800c5083a0 [ 30.603355] which belongs to the cache vm_area_struct of size 168 [ 30.604359] The buggy address is located 88 bytes inside of [ 30.604359] freed 168-byte region [ffff88800c5083a0, ffff88800c508448) [ 30.605318] [ 30.605454] The buggy address belongs to the physical page: [ 30.605950] page:00000000f3a69a1e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc508 [ 30.606634] memcg:ffff88800c509001 [ 30.606946] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.607384] page_type: 0xffffffff() [ 30.607665] raw: 0100000000000200 ffff8880087a0c80 ffffea000036a8c0 dead000000000006 [ 30.608308] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c509001 [ 30.608904] page dumped because: kasan: bad access detected [ 30.609361] [ 30.609495] Memory state around the buggy address: [ 30.609864] ffff88800c508280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.610451] ffff88800c508300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.610990] >ffff88800c508380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.611548] ^ [ 30.612108] ffff88800c508400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.612643] ffff88800c508480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.613215] ================================================================== [ 30.613963] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.541252] BUG: Bad rss-counter state mm:000000005110a927 type:MM_FILEPAGES val:33 [ 34.541961] BUG: Bad rss-counter state mm:000000005110a927 type:MM_ANONPAGES val:22 [ 35.330735] BUG: Bad rss-counter state mm:00000000e3331a11 type:MM_FILEPAGES val:33 [ 35.331505] BUG: Bad rss-counter state mm:00000000e3331a11 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20770' (ECDSA) to the list of known hosts. 2023/06/21 10:10:13 fuzzer started 2023/06/21 10:10:14 dialing manager at localhost:36067 2023/06/21 10:10:14 checking machine... 2023/06/21 10:10:14 checking revisions... [ 36.302585] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:10:14 testing simple program... [ 36.343977] cgroup: Unknown subsys name 'net' [ 36.392297] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:10:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f43bccc4000 RCX=ffffffff81007b82 RDX=ffff888015ae51c0 RSI=00007f43bccc4000 RDI=ffffffffff600000 RBP=0000000000000001 RSP=ffff888018d9f468 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b6a61 R12=ffff888018d9f5b0 R13=0000000000000000 R14=ffff888015ae51c0 R15=0000000000092cc0 RIP=ffffffff814c0438 RFL=00000206 [-----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 00007f43bc805900 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=00007fad2a52eb20 CR3=0000000019d14000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800f567548 RCX=0000000000000001 RDX=1ffff11001eaceab RSI=ffff88800f567b98 RDI=ffff88800f567558 RBP=ffff88800f567b98 RSP=ffff88800f5674a0 R8 =ffffffff8614686a R9 =ffff88800f567588 R10=0000000000038001 R11=00000000000231e5 R12=0000000000000008 R13=ffff88800f560000 R14=ffff88800f567ba0 R15=ffff88800f567548 RIP=ffffffff81130468 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 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=00007f43bcc35790 CR3=000000000a036000 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=0000000000000340fffffffe7ffbfeff XMM01=00000000000000000000000000000000 XMM02=00000000000000020000000000000000 XMM03=00000000000000008000000000000006 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000