[ 28.755956] BUG: Bad rss-counter state mm:000000005a70c0da type:MM_FILEPAGES val:33 [ 28.756951] BUG: Bad rss-counter state mm:000000005a70c0da type:MM_ANONPAGES val:22 [ 28.881732] ================================================================== [ 28.882637] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.883575] Read of size 8 at addr ffff88800de9aa50 by task sshd/219 [ 28.884340] [ 28.884559] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.885559] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.886533] Call Trace: [ 28.886876] [ 28.887159] dump_stack_lvl+0x91/0xf0 [ 28.887650] print_report+0xcc/0x620 [ 28.888130] ? __virt_addr_valid+0x102/0x340 [ 28.888688] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.889325] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.889945] kasan_report+0xbe/0xf0 [ 28.890418] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.891041] vma_interval_tree_remove+0xc75/0xec0 [ 28.891647] vma_prepare+0xc54/0x11a0 [ 28.892124] __split_vma+0x5af/0x950 [ 28.892596] ? __pfx___split_vma+0x10/0x10 [ 28.893125] ? find_held_lock+0x2c/0x110 [ 28.893642] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.894202] ? lock_is_held_type+0x9f/0x120 [ 28.894736] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.895342] ? mtree_range_walk+0x632/0x900 [ 28.895887] ? mas_walk+0x5c7/0x7c0 [ 28.896357] do_vmi_munmap+0x1f1/0x2b0 [ 28.896842] mmap_region+0x1f9/0x2660 [ 28.897337] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.897852] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.898561] ? __pfx_lock_acquire+0x10/0x10 [ 28.899118] ? __pfx_mmap_region+0x10/0x10 [ 28.899656] ? security_mmap_addr+0x7d/0xa0 [ 28.900187] ? get_unmapped_area+0x1f5/0x3f0 [ 28.900746] do_mmap+0x854/0xf00 [ 28.901198] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.901689] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.902248] ksys_mmap_pgoff+0x3af/0x500 [ 28.902752] do_syscall_64+0x3f/0x90 [ 28.903231] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.903882] RIP: 0033:0x7f481d32bd82 [ 28.904340] 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 [ 28.906481] RSP: 002b:00007ffea3fe4648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.907396] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f481d32bd82 [ 28.908234] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f481c765000 [ 28.909079] RBP: 00007f481c765000 R08: 0000000000000009 R09: 0000000000001000 [ 28.909920] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f7e284fec0 [ 28.910758] R13: 00007ffea3fe4660 R14: 00007ffea3fe4690 R15: 00007ffea3fe49f0 [ 28.911613] [ 28.911902] [ 28.912113] Allocated by task 209: [ 28.912542] kasan_save_stack+0x22/0x50 [ 28.913066] kasan_set_track+0x25/0x30 [ 28.913556] __kasan_slab_alloc+0x59/0x70 [ 28.914079] kmem_cache_alloc+0x16b/0x370 [ 28.914587] vm_area_dup+0x20/0x160 [ 28.915037] __split_vma+0x170/0x950 [ 28.915506] split_vma+0xc6/0x110 [ 28.915938] mprotect_fixup+0x8d2/0xb30 [ 28.916434] do_mprotect_pkey+0x87e/0xd40 [ 28.916950] __x64_sys_mprotect+0x78/0xc0 [ 28.917485] do_syscall_64+0x3f/0x90 [ 28.917959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.918597] [ 28.918816] Freed by task 209: [ 28.919208] kasan_save_stack+0x22/0x50 [ 28.919710] kasan_set_track+0x25/0x30 [ 28.920204] kasan_save_free_info+0x2b/0x50 [ 28.920737] __kasan_slab_free+0x10a/0x190 [ 28.921269] kmem_cache_free+0x10d/0x4d0 [ 28.921769] rcu_core+0x8c8/0x2860 [ 28.922206] __do_softirq+0x1b7/0x7d4 [ 28.922680] [ 28.922893] Last potentially related work creation: [ 28.923476] kasan_save_stack+0x22/0x50 [ 28.923974] __kasan_record_aux_stack+0x8e/0xa0 [ 28.924541] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.925198] remove_vma+0x139/0x170 [ 28.925652] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.926212] do_vmi_munmap+0x1f1/0x2b0 [ 28.926708] __vm_munmap+0x138/0x3a0 [ 28.927169] __x64_sys_munmap+0x59/0x80 [ 28.927659] do_syscall_64+0x3f/0x90 [ 28.928128] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.928759] [ 28.928988] Second to last potentially related work creation: [ 28.929672] kasan_save_stack+0x22/0x50 [ 28.930173] __kasan_record_aux_stack+0x8e/0xa0 [ 28.930739] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.931376] remove_vma+0x139/0x170 [ 28.931825] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.932381] do_vmi_munmap+0x1f1/0x2b0 [ 28.932875] mmap_region+0x1f9/0x2660 [ 28.933364] do_mmap+0x854/0xf00 [ 28.933795] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.934284] ksys_mmap_pgoff+0x3af/0x500 [ 28.934790] do_syscall_64+0x3f/0x90 [ 28.935258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.935893] [ 28.936106] The buggy address belongs to the object at ffff88800de9a9f8 [ 28.936106] which belongs to the cache vm_area_struct of size 168 [ 28.937588] The buggy address is located 88 bytes inside of [ 28.937588] freed 168-byte region [ffff88800de9a9f8, ffff88800de9aaa0) [ 28.938991] [ 28.939204] The buggy address belongs to the physical page: [ 28.939870] page:0000000034ff3f22 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800de9a3a0 pfn:0xde9a [ 28.941099] memcg:ffff88800f13d501 [ 28.941525] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.942165] page_type: 0xffffffff() [ 28.942620] raw: 0100000000000200 ffff88800879fc80 ffffea0000382010 ffffea0000406450 [ 28.943568] raw: ffff88800de9a3a0 000000000011000e 00000001ffffffff ffff88800f13d501 [ 28.944523] page dumped because: kasan: bad access detected [ 28.945260] [ 28.945483] Memory state around the buggy address: [ 28.946094] ffff88800de9a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.946995] ffff88800de9a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 28.947893] >ffff88800de9aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.948791] ^ [ 28.949537] ffff88800de9aa80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 28.950445] ffff88800de9ab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.951341] ================================================================== [ 28.952402] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.800479] BUG: Bad rss-counter state mm:000000005885707f type:MM_FILEPAGES val:33 [ 30.802095] BUG: Bad rss-counter state mm:000000005885707f type:MM_ANONPAGES val:22 [ 31.376758] BUG: Bad rss-counter state mm:00000000d4420dbb type:MM_FILEPAGES val:33 [ 31.377905] BUG: Bad rss-counter state mm:00000000d4420dbb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4585' (ECDSA) to the list of known hosts. 2023/06/20 05:13:01 fuzzer started 2023/06/20 05:13:01 dialing manager at localhost:44161 2023/06/20 05:13:01 checking machine... 2023/06/20 05:13:01 checking revisions... [ 32.028652] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:13:02 testing simple program... [ 32.071323] cgroup: Unknown subsys name 'net' [ 32.133371] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:12:56 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888018209b40 RSI=ffffffff813909ea RDI=0000000000000004 RBP=ffff88800ef67f58 RSP=ffff88800ef67f28 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800ef67f58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff812ddc44 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 00007f1cf58a9700 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=00007ffcf43bd998 CR3=000000000d676000 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=2031303a33313a3530203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a33313a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888016608001 RBX=ffff888016607ae0 RCX=0000000000000001 RDX=ffff888016607ae8 RSI=ffff888016607ad0 RDI=ffff888016607708 RBP=ffff888016600000 RSP=ffff888016607688 R8 =0000000000000001 R9 =ffff888016607738 R10=0000000000038001 R11=0000000000020c48 R12=ffff888016607758 R13=ffff888016607740 R14=ffff888016607ad0 R15=ffff8880166076f8 RIP=ffffffff8113128d RFL=00000287 [--S--PC] 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 00007fb44d348900 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=00007fb44d9000b0 CR3=000000000ed58000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000