[ 31.839197] BUG: Bad rss-counter state mm:000000009154f7e8 type:MM_FILEPAGES val:33 [ 31.840577] BUG: Bad rss-counter state mm:000000009154f7e8 type:MM_ANONPAGES val:22 [ 31.885945] ================================================================== [ 31.887135] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.888289] Read of size 8 at addr ffff88800e016d08 by task sshd/219 [ 31.889284] [ 31.889511] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.890528] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.891685] Call Trace: [ 31.892020] [ 31.892327] dump_stack_lvl+0x91/0xf0 [ 31.892957] print_report+0xcc/0x620 [ 31.893467] ? __virt_addr_valid+0x102/0x340 [ 31.894045] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.894717] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.895364] kasan_report+0xbe/0xf0 [ 31.895866] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.896513] vma_interval_tree_remove+0xc75/0xec0 [ 31.897135] vma_prepare+0xc54/0x11a0 [ 31.897628] __split_vma+0x5af/0x950 [ 31.898121] ? __pfx___split_vma+0x10/0x10 [ 31.898693] ? find_held_lock+0x2c/0x110 [ 31.899251] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.899842] ? lock_is_held_type+0x9f/0x120 [ 31.900405] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.901029] ? mtree_range_walk+0x632/0x900 [ 31.901603] ? mas_walk+0x5c7/0x7c0 [ 31.902097] do_vmi_munmap+0x1f1/0x2b0 [ 31.902603] mmap_region+0x1f9/0x2660 [ 31.903111] ? mark_held_locks+0x9e/0xe0 [ 31.903636] ? lockdep_hardirqs_on_prepare+0x27b/0x3f0 [ 31.904295] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 31.904997] ? __pfx_mmap_region+0x10/0x10 [ 31.905548] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 31.906269] ? do_mmap+0x36a/0xf00 [ 31.906741] do_mmap+0x854/0xf00 [ 31.907197] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.907705] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.908291] ksys_mmap_pgoff+0x3af/0x500 [ 31.908820] do_syscall_64+0x3f/0x90 [ 31.909322] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.909985] RIP: 0033:0x7f0a710e0d82 [ 31.910472] 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 [ 31.912712] RSP: 002b:00007fff67fc70e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.913660] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0a710e0d82 [ 31.914567] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0a7051a000 [ 31.915454] RBP: 00007f0a7051a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.916355] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cb99327d90 [ 31.917287] R13: 00007fff67fc7100 R14: 00007fff67fc7130 R15: 00007fff67fc7490 [ 31.918183] [ 31.918509] [ 31.918734] Allocated by task 212: [ 31.919177] kasan_save_stack+0x22/0x50 [ 31.919704] kasan_set_track+0x25/0x30 [ 31.920221] __kasan_slab_alloc+0x59/0x70 [ 31.920763] kmem_cache_alloc+0x16b/0x370 [ 31.921304] vm_area_dup+0x20/0x160 [ 31.921767] __split_vma+0x170/0x950 [ 31.922265] split_vma+0xc6/0x110 [ 31.922718] mprotect_fixup+0x8d2/0xb30 [ 31.923236] do_mprotect_pkey+0x87e/0xd40 [ 31.923775] __x64_sys_mprotect+0x78/0xc0 [ 31.924322] do_syscall_64+0x3f/0x90 [ 31.924804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.925473] [ 31.925689] Freed by task 212: [ 31.926096] kasan_save_stack+0x22/0x50 [ 31.926628] kasan_set_track+0x25/0x30 [ 31.927144] kasan_save_free_info+0x2b/0x50 [ 31.927702] __kasan_slab_free+0x10a/0x190 [ 31.928257] kmem_cache_free+0x10d/0x4d0 [ 31.928840] rcu_core+0x8c8/0x2860 [ 31.929314] __do_softirq+0x1b7/0x7d4 [ 31.929809] [ 31.930034] Last potentially related work creation: [ 31.930671] kasan_save_stack+0x22/0x50 [ 31.931193] __kasan_record_aux_stack+0x8e/0xa0 [ 31.931806] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.932480] remove_vma+0x139/0x170 [ 31.932945] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.933541] do_vmi_munmap+0x1f1/0x2b0 [ 31.934050] __vm_munmap+0x138/0x3a0 [ 31.934551] __x64_sys_munmap+0x59/0x80 [ 31.935080] do_syscall_64+0x3f/0x90 [ 31.935575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.936241] [ 31.936468] Second to last potentially related work creation: [ 31.937190] kasan_save_stack+0x22/0x50 [ 31.937703] __kasan_record_aux_stack+0x8e/0xa0 [ 31.938322] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.938990] remove_vma+0x139/0x170 [ 31.939460] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.940038] do_vmi_munmap+0x1f1/0x2b0 [ 31.940540] mmap_region+0x1f9/0x2660 [ 31.941030] do_mmap+0x854/0xf00 [ 31.941475] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.941990] ksys_mmap_pgoff+0x3af/0x500 [ 31.942531] do_syscall_64+0x3f/0x90 [ 31.943034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.943690] [ 31.943918] The buggy address belongs to the object at ffff88800e016cb0 [ 31.943918] which belongs to the cache vm_area_struct of size 168 [ 31.945454] The buggy address is located 88 bytes inside of [ 31.945454] freed 168-byte region [ffff88800e016cb0, ffff88800e016d58) [ 31.946962] [ 31.947187] The buggy address belongs to the physical page: [ 31.947882] page:000000000092afb5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe016 [ 31.949022] memcg:ffff88800ab5fc01 [ 31.949469] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.950147] page_type: 0xffffffff() [ 31.950633] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 31.951577] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ab5fc01 [ 31.952525] page dumped because: kasan: bad access detected [ 31.953212] [ 31.953432] Memory state around the buggy address: [ 31.954034] ffff88800e016c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.954934] ffff88800e016c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.955816] >ffff88800e016d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.956704] ^ [ 31.957149] ffff88800e016d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.958031] ffff88800e016e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.958925] ================================================================== [ 31.959893] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.525519] BUG: Bad rss-counter state mm:0000000034c35b48 type:MM_FILEPAGES val:33 [ 34.526489] BUG: Bad rss-counter state mm:0000000034c35b48 type:MM_ANONPAGES val:22 [ 35.114292] BUG: Bad rss-counter state mm:00000000ec6c6f1d type:MM_FILEPAGES val:33 [ 35.115542] BUG: Bad rss-counter state mm:00000000ec6c6f1d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20254' (ECDSA) to the list of known hosts. 2023/06/20 06:07:34 fuzzer started 2023/06/20 06:07:34 dialing manager at localhost:44161 2023/06/20 06:07:34 checking machine... 2023/06/20 06:07:34 checking revisions... [ 35.781901] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:07:34 testing simple program... [ 35.828118] cgroup: Unknown subsys name 'net' [ 35.881003] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:07:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888015e8a068 RCX=0000000000000000 RDX=1ffff110018f5082 RSI=ffffffff81f1b00e RDI=ffff888015e8a068 RBP=ffff888015e8a0a0 RSP=ffff888016837968 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=ffffffff849384a0 R13=1ffff11002d06f34 R14=ffff88800c7a8410 R15=ffff88800c7a8410 RIP=ffffffff814c07e4 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 00007fefb9516900 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=00007fefb9ace0b0 CR3=000000000febc000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000001 RDX=1ffff1100d9e72a8 RSI=0000000000000001 RDI=ffff888008e27dc8 RBP=0000000000000000 RSP=ffff888008e27dc0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450c164 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 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=00007f65d56ab9e8 CR3=000000000ebcc000 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=5627c57aaeba409f6d47c65004d237e9 XMM02=2c67c8bc2e329bc3000000000011d260 XMM03=fb795ef6d65770560000000000123c00 XMM04=d220ae3705a7060500000000000ae988 XMM05=baeef053db6584a60000000000135998 XMM06=806171799158d96700000000001346c8 XMM07=e042d86d42eb936e0000000000123e80 XMM08=d37fcc1e42ebd1e8000000000011d2c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000