syzkaller login: [ 76.665579] BUG: Bad rss-counter state mm:000000003c290b0c type:MM_FILEPAGES val:33 [ 76.666586] BUG: Bad rss-counter state mm:000000003c290b0c type:MM_ANONPAGES val:22 [ 76.912743] ================================================================== [ 76.913696] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 76.914654] Read of size 8 at addr ffff88800e442310 by task sshd/219 [ 76.915432] [ 76.915655] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 76.916784] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 76.917778] Call Trace: [ 76.918096] [ 76.918394] dump_stack_lvl+0x91/0xf0 [ 76.918894] print_report+0xcc/0x620 [ 76.919393] ? __virt_addr_valid+0x102/0x340 [ 76.919953] ? vma_interval_tree_remove+0xc75/0xec0 [ 76.920584] ? vma_interval_tree_remove+0xc75/0xec0 [ 76.921214] kasan_report+0xbe/0xf0 [ 76.921728] ? vma_interval_tree_remove+0xc75/0xec0 [ 76.922364] vma_interval_tree_remove+0xc75/0xec0 [ 76.922966] vma_prepare+0xc54/0x11a0 [ 76.923443] __split_vma+0x5af/0x950 [ 76.923909] ? __pfx___split_vma+0x10/0x10 [ 76.924443] ? find_held_lock+0x2c/0x110 [ 76.924973] do_vmi_align_munmap+0x2ba/0x11f0 [ 76.925547] ? lock_is_held_type+0x9f/0x120 [ 76.926092] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 76.926694] ? mtree_range_walk+0x632/0x900 [ 76.927250] ? mas_walk+0x5c7/0x7c0 [ 76.927724] do_vmi_munmap+0x1f1/0x2b0 [ 76.928210] mmap_region+0x1f9/0x2660 [ 76.928687] ? vm_mmap_pgoff+0x15c/0x3a0 [ 76.929200] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 76.929937] ? __pfx_lock_acquire+0x10/0x10 [ 76.930468] ? __pfx_mmap_region+0x10/0x10 [ 76.930994] ? security_mmap_addr+0x7d/0xa0 [ 76.931531] ? get_unmapped_area+0x1f5/0x3f0 [ 76.932074] do_mmap+0x854/0xf00 [ 76.932519] vm_mmap_pgoff+0x1a6/0x3a0 [ 76.933011] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 76.933591] ksys_mmap_pgoff+0x3af/0x500 [ 76.934095] do_syscall_64+0x3f/0x90 [ 76.934579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 76.935222] RIP: 0033:0x7f5c11d0bd82 [ 76.935683] 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 [ 76.937813] RSP: 002b:00007ffe0181afa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 76.938722] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5c11d0bd82 [ 76.939569] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5c11145000 [ 76.940422] RBP: 00007f5c11145000 R08: 0000000000000009 R09: 0000000000001000 [ 76.941286] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d7c037b20 [ 76.942138] R13: 00007ffe0181afc0 R14: 00007ffe0181aff0 R15: 00007ffe0181b350 [ 76.943007] [ 76.943298] [ 76.943524] Allocated by task 212: [ 76.943958] kasan_save_stack+0x22/0x50 [ 76.944466] kasan_set_track+0x25/0x30 [ 76.944964] __kasan_slab_alloc+0x59/0x70 [ 76.945500] kmem_cache_alloc+0x16b/0x370 [ 76.946024] vm_area_dup+0x20/0x160 [ 76.946482] __split_vma+0x170/0x950 [ 76.946951] split_vma+0xc6/0x110 [ 76.947390] mprotect_fixup+0x8d2/0xb30 [ 76.947897] do_mprotect_pkey+0x87e/0xd40 [ 76.948413] __x64_sys_mprotect+0x78/0xc0 [ 76.948931] do_syscall_64+0x3f/0x90 [ 76.949429] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 76.950074] [ 76.950287] Freed by task 203: [ 76.950675] kasan_save_stack+0x22/0x50 [ 76.951180] kasan_set_track+0x25/0x30 [ 76.951674] kasan_save_free_info+0x2b/0x50 [ 76.952213] __kasan_slab_free+0x10a/0x190 [ 76.952751] kmem_cache_free+0x10d/0x4d0 [ 76.953252] rcu_core+0x8c8/0x2860 [ 76.953724] __do_softirq+0x1b7/0x7d4 [ 76.954205] [ 76.954428] Last potentially related work creation: [ 76.955017] kasan_save_stack+0x22/0x50 [ 76.955527] __kasan_record_aux_stack+0x8e/0xa0 [ 76.956095] __call_rcu_common.constprop.0+0x6a/0xb90 [ 76.956743] remove_vma+0x139/0x170 [ 76.957200] do_vmi_align_munmap+0xd4a/0x11f0 [ 76.957773] do_vmi_munmap+0x1f1/0x2b0 [ 76.958259] __vm_munmap+0x138/0x3a0 [ 76.958723] __x64_sys_munmap+0x59/0x80 [ 76.959230] do_syscall_64+0x3f/0x90 [ 76.959715] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 76.960350] [ 76.960573] Second to last potentially related work creation: [ 76.961253] kasan_save_stack+0x22/0x50 [ 76.961766] __kasan_record_aux_stack+0x8e/0xa0 [ 76.962342] __call_rcu_common.constprop.0+0x6a/0xb90 [ 76.962984] remove_vma+0x139/0x170 [ 76.963437] do_vmi_align_munmap+0xd4a/0x11f0 [ 76.963990] do_vmi_munmap+0x1f1/0x2b0 [ 76.964481] mmap_region+0x1f9/0x2660 [ 76.964962] do_mmap+0x854/0xf00 [ 76.965412] vm_mmap_pgoff+0x1a6/0x3a0 [ 76.965902] ksys_mmap_pgoff+0x3af/0x500 [ 76.966407] do_syscall_64+0x3f/0x90 [ 76.966878] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 76.967517] [ 76.967730] The buggy address belongs to the object at ffff88800e4422b8 [ 76.967730] which belongs to the cache vm_area_struct of size 168 [ 76.969199] The buggy address is located 88 bytes inside of [ 76.969199] freed 168-byte region [ffff88800e4422b8, ffff88800e442360) [ 76.970614] [ 76.970836] The buggy address belongs to the physical page: [ 76.971505] page:00000000960742eb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe442 [ 76.972612] memcg:ffff88800dfb3a01 [ 76.973045] flags: 0x100000000000200(slab|node=0|zone=1) [ 76.973718] page_type: 0xffffffff() [ 76.974188] raw: 0100000000000200 ffff88800879fc80 ffffea0000679240 dead000000000008 [ 76.975117] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfb3a01 [ 76.976033] page dumped because: kasan: bad access detected [ 76.976702] [ 76.976919] Memory state around the buggy address: [ 76.977516] ffff88800e442200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 76.978379] ffff88800e442280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 76.979248] >ffff88800e442300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 76.980108] ^ [ 76.980577] ffff88800e442380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 76.981440] ffff88800e442400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 76.982288] ================================================================== [ 76.983314] Disabling lock debugging due to kernel taint [ 78.967236] BUG: Bad rss-counter state mm:000000004cd98410 type:MM_FILEPAGES val:33 [ 78.968277] BUG: Bad rss-counter state mm:000000004cd98410 type:MM_ANONPAGES val:22 [ 79.427515] BUG: Bad rss-counter state mm:00000000cdf3bedd type:MM_FILEPAGES val:33 [ 79.429153] BUG: Bad rss-counter state mm:00000000cdf3bedd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30950' (ECDSA) to the list of known hosts. 2023/06/20 01:50:49 fuzzer started 2023/06/20 01:50:50 dialing manager at localhost:44161 2023/06/20 01:50:50 checking machine... 2023/06/20 01:50:50 checking revisions... [ 80.159635] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:50:50 testing simple program... [ 80.213486] cgroup: Unknown subsys name 'net' [ 80.249121] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:50:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801691e600 RCX=ffff88801691e600 RDX=0000000080070001 RSI=ffff88801691e600 RDI=ffff8880087b63c0 RBP=ffff8880167efc38 RSP=ffff8880167efba0 R8 =0000000080070000 R9 =0000000000000000 R10=ffffea00005a4600 R11=0000000080070001 R12=ffffea00005a4600 R13=ffff88801691d500 R14=0000000080070000 R15=ffff8880087b63c0 RIP=ffffffff818094f2 RFL=00000202 [-------] 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 00007fc27bdff900 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=00007fc27c3b4650 CR3=000000000e9d8000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f76044c3470 CR3=000000000ed9a000 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=91ed4c1c8b29adaf604f2b70e35efdde XMM02=ec2efd57dc4c00df0000000000122698 XMM03=09ddceb01a91b3ac0000000000122768 XMM04=e80c48b725ddcb0f00000000000ae988 XMM05=19e9129bd510f2350000000000139b68 XMM06=cd4e06f0572b0de50000000000138d40 XMM07=e042d86d42eb936e0000000000128b98 XMM08=09ddceb01a91b3ac0000000000122768 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000