syzkaller login: [ 77.576962] BUG: Bad rss-counter state mm:0000000044170e9d type:MM_FILEPAGES val:33 [ 77.577977] BUG: Bad rss-counter state mm:0000000044170e9d type:MM_ANONPAGES val:22 [ 77.737150] ================================================================== [ 77.738216] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 77.739315] Read of size 8 at addr ffff88800d501968 by task sshd/220 [ 77.740378] [ 77.740603] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 77.741630] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 77.742608] Call Trace: [ 77.742928] [ 77.743209] dump_stack_lvl+0x91/0xf0 [ 77.743700] print_report+0xcc/0x620 [ 77.744202] ? __virt_addr_valid+0x102/0x340 [ 77.744764] ? vma_interval_tree_remove+0xc75/0xec0 [ 77.745377] ? vma_interval_tree_remove+0xc75/0xec0 [ 77.746002] kasan_report+0xbe/0xf0 [ 77.746487] ? vma_interval_tree_remove+0xc75/0xec0 [ 77.747101] vma_interval_tree_remove+0xc75/0xec0 [ 77.747705] vma_prepare+0xc54/0x11a0 [ 77.748206] __split_vma+0x5af/0x950 [ 77.748683] ? __pfx___split_vma+0x10/0x10 [ 77.749206] ? find_held_lock+0x2c/0x110 [ 77.749725] do_vmi_align_munmap+0x2ba/0x11f0 [ 77.750283] ? lock_is_held_type+0x9f/0x120 [ 77.750820] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 77.751420] ? mtree_range_walk+0x632/0x900 [ 77.751966] ? mas_walk+0x5c7/0x7c0 [ 77.752447] do_vmi_munmap+0x1f1/0x2b0 [ 77.752939] mmap_region+0x1f9/0x2660 [ 77.753425] ? vm_mmap_pgoff+0x15c/0x3a0 [ 77.753933] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 77.754647] ? __pfx_lock_acquire+0x10/0x10 [ 77.755179] ? __pfx_mmap_region+0x10/0x10 [ 77.755705] ? security_mmap_addr+0x7d/0xa0 [ 77.756249] ? get_unmapped_area+0x1f5/0x3f0 [ 77.756792] do_mmap+0x854/0xf00 [ 77.757232] vm_mmap_pgoff+0x1a6/0x3a0 [ 77.757752] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 77.758352] ksys_mmap_pgoff+0x3af/0x500 [ 77.758887] do_syscall_64+0x3f/0x90 [ 77.759377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 77.760013] RIP: 0033:0x7f309f3ecd82 [ 77.760485] 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 [ 77.762635] RSP: 002b:00007ffdf520b148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 77.763540] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f309f3ecd82 [ 77.764402] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f309e826000 [ 77.765236] RBP: 00007f309e826000 R08: 0000000000000009 R09: 0000000000001000 [ 77.766077] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556599d71ec0 [ 77.766964] R13: 00007ffdf520b160 R14: 00007ffdf520b190 R15: 00007ffdf520b4f0 [ 77.767855] [ 77.768156] [ 77.768374] Allocated by task 213: [ 77.768808] kasan_save_stack+0x22/0x50 [ 77.769312] kasan_set_track+0x25/0x30 [ 77.769817] __kasan_slab_alloc+0x59/0x70 [ 77.770354] kmem_cache_alloc+0x16b/0x370 [ 77.770873] vm_area_dup+0x20/0x160 [ 77.771363] __split_vma+0x170/0x950 [ 77.771833] split_vma+0xc6/0x110 [ 77.772306] mprotect_fixup+0x8d2/0xb30 [ 77.772813] do_mprotect_pkey+0x87e/0xd40 [ 77.773334] __x64_sys_mprotect+0x78/0xc0 [ 77.773867] do_syscall_64+0x3f/0x90 [ 77.774342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 77.774990] [ 77.775226] Freed by task 204: [ 77.775635] kasan_save_stack+0x22/0x50 [ 77.776146] kasan_set_track+0x25/0x30 [ 77.776657] kasan_save_free_info+0x2b/0x50 [ 77.777215] __kasan_slab_free+0x10a/0x190 [ 77.777771] kmem_cache_free+0x10d/0x4d0 [ 77.778298] rcu_core+0x8c8/0x2860 [ 77.778758] __do_softirq+0x1b7/0x7d4 [ 77.779257] [ 77.779484] Last potentially related work creation: [ 77.780093] kasan_save_stack+0x22/0x50 [ 77.780631] __kasan_record_aux_stack+0x8e/0xa0 [ 77.781230] __call_rcu_common.constprop.0+0x6a/0xb90 [ 77.781901] remove_vma+0x139/0x170 [ 77.782377] do_vmi_align_munmap+0xd4a/0x11f0 [ 77.782956] do_vmi_munmap+0x1f1/0x2b0 [ 77.783454] __vm_munmap+0x138/0x3a0 [ 77.783936] __x64_sys_munmap+0x59/0x80 [ 77.784475] do_syscall_64+0x3f/0x90 [ 77.784968] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 77.785637] [ 77.785857] The buggy address belongs to the object at ffff88800d501910 [ 77.785857] which belongs to the cache vm_area_struct of size 168 [ 77.787386] The buggy address is located 88 bytes inside of [ 77.787386] freed 168-byte region [ffff88800d501910, ffff88800d5019b8) [ 77.788845] [ 77.789063] The buggy address belongs to the physical page: [ 77.789744] page:000000000043c94b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd501 [ 77.790870] memcg:ffff88800db57f01 [ 77.791312] flags: 0x100000000000200(slab|node=0|zone=1) [ 77.791978] page_type: 0xffffffff() [ 77.792454] raw: 0100000000000200 ffff88800879fc80 ffffea0000383a40 dead000000000004 [ 77.793417] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db57f01 [ 77.794359] page dumped because: kasan: bad access detected [ 77.795038] [ 77.795260] Memory state around the buggy address: [ 77.795861] ffff88800d501800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 77.796768] ffff88800d501880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 77.797662] >ffff88800d501900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 77.798541] ^ [ 77.799344] ffff88800d501980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 77.800244] ffff88800d501a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 77.801134] ================================================================== [ 77.802299] Disabling lock debugging due to kernel taint [ 79.546209] BUG: Bad rss-counter state mm:00000000c7b9de47 type:MM_FILEPAGES val:33 [ 79.546887] BUG: Bad rss-counter state mm:00000000c7b9de47 type:MM_ANONPAGES val:22 [ 80.107066] BUG: Bad rss-counter state mm:000000000afdd3bf type:MM_FILEPAGES val:33 [ 80.108256] BUG: Bad rss-counter state mm:000000000afdd3bf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21751' (ECDSA) to the list of known hosts. 2023/06/20 07:01:21 fuzzer started 2023/06/20 07:01:21 dialing manager at localhost:44161 2023/06/20 07:01:21 checking machine... 2023/06/20 07:01:21 checking revisions... [ 80.744112] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:01:21 testing simple program... [ 80.799401] cgroup: Unknown subsys name 'net' [ 80.841080] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:00:38 Registers: info registers vcpu 0 RAX=ffffffff8363de4f RBX=ffffffff85fa39bc RCX=ffffffff8363de42 RDX=0000000000000000 RSI=ffffffff863b1c96 RDI=ffffffff85fa39b0 RBP=ffffffff85fa39b0 RSP=ffff88806ce099c0 R8 =ffffffff863b1c96 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=000000000008a977 R12=ffffffff85fa39b8 R13=ffffffff85fa39b0 R14=ffffffff85fa39b0 R15=dffffc0000000000 RIP=ffffffff8112fc9f RFL=00000297 [--S-APC] 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 00007f440a7ae900 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=00007fffc53ad000 CR3=000000000ddb2000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=ffff888008c58400 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=00007f5cf887b000 CR3=0000000014574000 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=ae151c0ffdf4e8a5d2441b88cfe8875b XMM02=00000000001266b8ec2efd57dc4c00df XMM03=000000000012d06083bc55d18089690f XMM04=f27ff8b6f775bca000000000000ae988 XMM05=19e9129bd510f235000000000013c740 XMM06=13e6b028ce9dd85c000000000013b918 XMM07=e042d86d42eb936e000000000012d2e0 XMM08=83bc55d18089690f0000000000126718 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000