[ 66.491946] BUG: Bad rss-counter state mm:000000002a699f78 type:MM_FILEPAGES val:33 [ 66.493201] BUG: Bad rss-counter state mm:000000002a699f78 type:MM_ANONPAGES val:22 [ 66.531260] ================================================================== [ 66.532370] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 66.533327] Read of size 8 at addr ffff888016ae9058 by task sshd/225 [ 66.534113] [ 66.534336] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 66.535239] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 66.536203] Call Trace: [ 66.536521] [ 66.536810] dump_stack_lvl+0x91/0xf0 [ 66.537298] print_report+0xcc/0x620 [ 66.537780] ? __virt_addr_valid+0x102/0x340 [ 66.538339] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.538962] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.539575] kasan_report+0xbe/0xf0 [ 66.540050] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.540696] vma_interval_tree_remove+0xc75/0xec0 [ 66.541318] vma_prepare+0xc54/0x11a0 [ 66.541808] __split_vma+0x5af/0x950 [ 66.542295] ? __pfx___split_vma+0x10/0x10 [ 66.542861] ? find_held_lock+0x2c/0x110 [ 66.543405] do_vmi_align_munmap+0x2ba/0x11f0 [ 66.543993] ? lock_is_held_type+0x9f/0x120 [ 66.544535] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 66.545140] ? mtree_range_walk+0x632/0x900 [ 66.545689] ? mas_walk+0x5c7/0x7c0 [ 66.546165] do_vmi_munmap+0x1f1/0x2b0 [ 66.546676] mmap_region+0x1f9/0x2660 [ 66.547160] ? vm_mmap_pgoff+0x15c/0x3a0 [ 66.547674] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 66.548391] ? __pfx_lock_acquire+0x10/0x10 [ 66.548925] ? __pfx_mmap_region+0x10/0x10 [ 66.549459] ? security_mmap_addr+0x7d/0xa0 [ 66.549992] ? get_unmapped_area+0x1f5/0x3f0 [ 66.550550] do_mmap+0x854/0xf00 [ 66.550991] vm_mmap_pgoff+0x1a6/0x3a0 [ 66.551488] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 66.552048] ksys_mmap_pgoff+0x3af/0x500 [ 66.552561] do_syscall_64+0x3f/0x90 [ 66.553038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.553685] RIP: 0033:0x7f2a11912d82 [ 66.554137] 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 [ 66.556248] RSP: 002b:00007ffd635f6888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 66.557142] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2a11912d82 [ 66.557976] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2a10d4c000 [ 66.558842] RBP: 00007f2a10d4c000 R08: 0000000000000009 R09: 0000000000001000 [ 66.559697] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb20662ec0 [ 66.560576] R13: 00007ffd635f68a0 R14: 00007ffd635f68d0 R15: 00007ffd635f6c30 [ 66.561448] [ 66.561746] [ 66.561962] Allocated by task 208: [ 66.562394] kasan_save_stack+0x22/0x50 [ 66.562903] kasan_set_track+0x25/0x30 [ 66.563397] __kasan_slab_alloc+0x59/0x70 [ 66.563914] kmem_cache_alloc+0x16b/0x370 [ 66.564433] vm_area_dup+0x20/0x160 [ 66.564883] __split_vma+0x170/0x950 [ 66.565353] split_vma+0xc6/0x110 [ 66.565796] mprotect_fixup+0x8d2/0xb30 [ 66.566309] do_mprotect_pkey+0x87e/0xd40 [ 66.566845] __x64_sys_mprotect+0x78/0xc0 [ 66.567368] do_syscall_64+0x3f/0x90 [ 66.567844] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.568483] [ 66.568700] Freed by task 208: [ 66.569091] kasan_save_stack+0x22/0x50 [ 66.569601] kasan_set_track+0x25/0x30 [ 66.570098] kasan_save_free_info+0x2b/0x50 [ 66.570647] __kasan_slab_free+0x10a/0x190 [ 66.571180] kmem_cache_free+0x10d/0x4d0 [ 66.571687] rcu_core+0x8c8/0x2860 [ 66.572129] __do_softirq+0x1b7/0x7d4 [ 66.572607] [ 66.572819] Last potentially related work creation: [ 66.573402] kasan_save_stack+0x22/0x50 [ 66.573900] __kasan_record_aux_stack+0x8e/0xa0 [ 66.574472] __call_rcu_common.constprop.0+0x6a/0xb90 [ 66.575120] remove_vma+0x139/0x170 [ 66.575575] do_vmi_align_munmap+0xd4a/0x11f0 [ 66.576129] do_vmi_munmap+0x1f1/0x2b0 [ 66.576609] __vm_munmap+0x138/0x3a0 [ 66.577075] __x64_sys_munmap+0x59/0x80 [ 66.577574] do_syscall_64+0x3f/0x90 [ 66.578044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.578689] [ 66.578901] The buggy address belongs to the object at ffff888016ae9000 [ 66.578901] which belongs to the cache vm_area_struct of size 168 [ 66.580357] The buggy address is located 88 bytes inside of [ 66.580357] freed 168-byte region [ffff888016ae9000, ffff888016ae90a8) [ 66.581746] [ 66.581963] The buggy address belongs to the physical page: [ 66.582641] page:00000000ad4a9c70 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ae9 [ 66.583724] memcg:ffff88800f7a1501 [ 66.584147] flags: 0x100000000000200(slab|node=0|zone=1) [ 66.584790] page_type: 0xffffffff() [ 66.585237] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 66.586147] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f7a1501 [ 66.587062] page dumped because: kasan: bad access detected [ 66.587725] [ 66.587941] Memory state around the buggy address: [ 66.588519] ffff888016ae8f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 66.589395] ffff888016ae8f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 66.590253] >ffff888016ae9000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.591115] ^ [ 66.591841] ffff888016ae9080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 66.592706] ffff888016ae9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.593566] ================================================================== [ 66.594858] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 69.392671] BUG: Bad rss-counter state mm:000000002abe0c71 type:MM_FILEPAGES val:33 [ 69.393871] BUG: Bad rss-counter state mm:000000002abe0c71 type:MM_ANONPAGES val:22 [ 69.912354] BUG: Bad rss-counter state mm:000000007bb37248 type:MM_FILEPAGES val:33 [ 69.913343] BUG: Bad rss-counter state mm:000000007bb37248 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19197' (ECDSA) to the list of known hosts. 2023/06/19 23:50:56 fuzzer started 2023/06/19 23:50:56 dialing manager at localhost:44161 2023/06/19 23:50:56 checking machine... 2023/06/19 23:50:56 checking revisions... [ 70.568863] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:50:56 testing simple program... [ 70.619492] cgroup: Unknown subsys name 'net' [ 70.663146] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:50:50 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=0000000000000000 RCX=ffffffff814c84ed RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b5420 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=ffff88800d9bdb80 RIP=ffffffff814c01d0 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 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=00007f8d92906c58 CR3=000000000eb18000 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=2035353a30353a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a30353a3332203931 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=ffff888015d9d1c0 RSI=ffffffff844a4a4e RDI=0000000000000005 RBP=ffff88800cabb800 RSP=ffff88800d5b7b18 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000003 R11=0000000000000000 R12=0000000000000001 R13=dffffc0000000000 R14=ffff888019c7b7c0 R15=ffff88800d5b7e70 RIP=ffffffff814c07e4 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 00007f4f4bed1900 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=00007f4f4beb0020 CR3=000000000fe48000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000