[ 33.754729] BUG: Bad rss-counter state mm:00000000a5fd3db9 type:MM_FILEPAGES val:33 [ 33.755688] BUG: Bad rss-counter state mm:00000000a5fd3db9 type:MM_ANONPAGES val:22 [ 33.871125] ================================================================== [ 33.871762] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.872394] Read of size 8 at addr ffff88800e1b95c8 by task sshd/219 [ 33.872910] [ 33.873057] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.873645] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.874345] Call Trace: [ 33.874561] [ 33.874756] dump_stack_lvl+0x91/0xf0 [ 33.875087] print_report+0xcc/0x620 [ 33.875414] ? __virt_addr_valid+0x102/0x340 [ 33.875912] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.876334] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.876742] kasan_report+0xbe/0xf0 [ 33.877071] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.877493] vma_interval_tree_remove+0xc75/0xec0 [ 33.877923] vma_prepare+0xc54/0x11a0 [ 33.878264] __split_vma+0x5af/0x950 [ 33.878586] ? __pfx___split_vma+0x10/0x10 [ 33.878944] ? find_held_lock+0x2c/0x110 [ 33.879298] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.879682] ? lock_is_held_type+0x9f/0x120 [ 33.880048] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.880462] ? mtree_range_walk+0x632/0x900 [ 33.880831] ? mas_walk+0x5c7/0x7c0 [ 33.881151] do_vmi_munmap+0x1f1/0x2b0 [ 33.881482] mmap_region+0x1f9/0x2660 [ 33.881843] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.882190] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.882676] ? __pfx_lock_acquire+0x10/0x10 [ 33.883043] ? __pfx_mmap_region+0x10/0x10 [ 33.883402] ? security_mmap_addr+0x7d/0xa0 [ 33.883759] ? get_unmapped_area+0x1f5/0x3f0 [ 33.884135] do_mmap+0x854/0xf00 [ 33.884436] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.884775] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.885166] ksys_mmap_pgoff+0x3af/0x500 [ 33.885512] do_syscall_64+0x3f/0x90 [ 33.885847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.886286] RIP: 0033:0x7f1ee94fdd82 [ 33.886600] 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 [ 33.888066] RSP: 002b:00007ffffe4ec3e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.888687] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1ee94fdd82 [ 33.889275] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1ee8937000 [ 33.889877] RBP: 00007f1ee8937000 R08: 0000000000000009 R09: 0000000000001000 [ 33.890460] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563bed2b1b20 [ 33.891033] R13: 00007ffffe4ec400 R14: 00007ffffe4ec430 R15: 00007ffffe4ec790 [ 33.891612] [ 33.891812] [ 33.891968] Allocated by task 210: [ 33.892261] kasan_save_stack+0x22/0x50 [ 33.892604] kasan_set_track+0x25/0x30 [ 33.892947] __kasan_slab_alloc+0x59/0x70 [ 33.893301] kmem_cache_alloc+0x16b/0x370 [ 33.893647] vm_area_dup+0x20/0x160 [ 33.893974] __split_vma+0x170/0x950 [ 33.894287] split_vma+0xc6/0x110 [ 33.894588] mprotect_fixup+0x8d2/0xb30 [ 33.894923] do_mprotect_pkey+0x87e/0xd40 [ 33.895277] __x64_sys_mprotect+0x78/0xc0 [ 33.895633] do_syscall_64+0x3f/0x90 [ 33.895953] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.896395] [ 33.896546] Freed by task 210: [ 33.896815] kasan_save_stack+0x22/0x50 [ 33.897161] kasan_set_track+0x25/0x30 [ 33.897502] kasan_save_free_info+0x2b/0x50 [ 33.897880] __kasan_slab_free+0x10a/0x190 [ 33.898241] kmem_cache_free+0x10d/0x4d0 [ 33.898579] rcu_core+0x8c8/0x2860 [ 33.898885] __do_softirq+0x1b7/0x7d4 [ 33.899210] [ 33.899357] Last potentially related work creation: [ 33.899753] kasan_save_stack+0x22/0x50 [ 33.900098] __kasan_record_aux_stack+0x8e/0xa0 [ 33.900491] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.900929] remove_vma+0x139/0x170 [ 33.901237] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.901625] do_vmi_munmap+0x1f1/0x2b0 [ 33.901983] __vm_munmap+0x138/0x3a0 [ 33.902301] __x64_sys_munmap+0x59/0x80 [ 33.902634] do_syscall_64+0x3f/0x90 [ 33.902955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.903387] [ 33.903533] Second to last potentially related work creation: [ 33.903993] kasan_save_stack+0x22/0x50 [ 33.904331] __kasan_record_aux_stack+0x8e/0xa0 [ 33.904715] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.905151] remove_vma+0x139/0x170 [ 33.905455] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.905835] do_vmi_munmap+0x1f1/0x2b0 [ 33.906169] mmap_region+0x1f9/0x2660 [ 33.906488] do_mmap+0x854/0xf00 [ 33.906776] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.907113] ksys_mmap_pgoff+0x3af/0x500 [ 33.907455] do_syscall_64+0x3f/0x90 [ 33.907781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.908224] [ 33.908368] The buggy address belongs to the object at ffff88800e1b9570 [ 33.908368] which belongs to the cache vm_area_struct of size 168 [ 33.909363] The buggy address is located 88 bytes inside of [ 33.909363] freed 168-byte region [ffff88800e1b9570, ffff88800e1b9618) [ 33.910273] [ 33.910393] The buggy address belongs to the physical page: [ 33.910753] page:000000000ba869ad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1b9 [ 33.911343] memcg:ffff88800db11b01 [ 33.911574] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.911954] page_type: 0xffffffff() [ 33.912196] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 33.912693] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db11b01 [ 33.913333] page dumped because: kasan: bad access detected [ 33.913713] [ 33.913862] Memory state around the buggy address: [ 33.914200] ffff88800e1b9480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.914695] ffff88800e1b9500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 33.915309] >ffff88800e1b9580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.915777] ^ [ 33.916145] ffff88800e1b9600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 33.916616] ffff88800e1b9680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.917222] ================================================================== [ 33.917910] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.790008] BUG: Bad rss-counter state mm:00000000caf292b0 type:MM_FILEPAGES val:33 [ 35.790659] BUG: Bad rss-counter state mm:00000000caf292b0 type:MM_ANONPAGES val:22 [ 36.113010] BUG: Bad rss-counter state mm:00000000ea4242d8 type:MM_FILEPAGES val:33 [ 36.113665] BUG: Bad rss-counter state mm:00000000ea4242d8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1738' (ECDSA) to the list of known hosts. 2023/06/20 08:44:06 fuzzer started 2023/06/20 08:44:07 dialing manager at localhost:44161 2023/06/20 08:44:07 checking machine... 2023/06/20 08:44:07 checking revisions... [ 36.629066] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:44:07 testing simple program... [ 36.663350] cgroup: Unknown subsys name 'net' [ 36.707231] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:44:03 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f09d4bbbee0 CR3=000000000d996000 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=2036303a34343a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a34343a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800901e2b8 RBX=ffff88800901d9e8 RCX=1ffff110011be344 RDX=dffffc0000000000 RSI=ffff888008e88490 RDI=ffff88800901da18 RBP=ffff8880093acd88 RSP=ffff88800ccf7db8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff888008e88480 R13=0000000000000000 R14=ffff88801a37b638 R15=ffff88801a37b5f0 RIP=ffffffff81847508 RFL=00000046 [---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 00007f8e61d50900 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=00007f8e6211c328 CR3=0000000019f10000 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