syzkaller login: [ 31.093295] BUG: Bad rss-counter state mm:00000000a27e0a5d type:MM_FILEPAGES val:33 [ 31.095045] BUG: Bad rss-counter state mm:00000000a27e0a5d type:MM_ANONPAGES val:22 [ 31.266357] ================================================================== [ 31.267268] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.268199] Read of size 8 at addr ffff888015fd5ed8 by task sshd/220 [ 31.268961] [ 31.269178] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.270220] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.271243] Call Trace: [ 31.271559] [ 31.271848] dump_stack_lvl+0x91/0xf0 [ 31.272343] print_report+0xcc/0x620 [ 31.272828] ? __virt_addr_valid+0x102/0x340 [ 31.273382] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.274002] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.274628] kasan_report+0xbe/0xf0 [ 31.275109] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.275746] vma_interval_tree_remove+0xc75/0xec0 [ 31.276360] vma_prepare+0xc54/0x11a0 [ 31.276841] __split_vma+0x5af/0x950 [ 31.277307] ? __pfx___split_vma+0x10/0x10 [ 31.277833] ? find_held_lock+0x2c/0x110 [ 31.278360] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.278931] ? lock_is_held_type+0x9f/0x120 [ 31.279468] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.280073] ? mtree_range_walk+0x632/0x900 [ 31.280622] ? mas_walk+0x5c7/0x7c0 [ 31.281099] do_vmi_munmap+0x1f1/0x2b0 [ 31.281594] mmap_region+0x1f9/0x2660 [ 31.282074] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.282578] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.283315] ? __pfx_lock_acquire+0x10/0x10 [ 31.283848] ? __pfx_mmap_region+0x10/0x10 [ 31.284381] ? security_mmap_addr+0x7d/0xa0 [ 31.284913] ? get_unmapped_area+0x1f5/0x3f0 [ 31.285460] do_mmap+0x854/0xf00 [ 31.285899] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.286393] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.286958] ksys_mmap_pgoff+0x3af/0x500 [ 31.287462] do_syscall_64+0x3f/0x90 [ 31.287936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.288582] RIP: 0033:0x7fd57fcbed82 [ 31.289039] 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 [ 31.291155] RSP: 002b:00007fff72cdeff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.292064] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd57fcbed82 [ 31.292934] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd57f0f8000 [ 31.293810] RBP: 00007fd57f0f8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.294684] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bd34e57b20 [ 31.295520] R13: 00007fff72cdf010 R14: 00007fff72cdf040 R15: 00007fff72cdf3a0 [ 31.296383] [ 31.296673] [ 31.296886] Allocated by task 213: [ 31.297316] kasan_save_stack+0x22/0x50 [ 31.297819] kasan_set_track+0x25/0x30 [ 31.298310] __kasan_slab_alloc+0x59/0x70 [ 31.298846] kmem_cache_alloc+0x16b/0x370 [ 31.299362] vm_area_dup+0x20/0x160 [ 31.299814] __split_vma+0x170/0x950 [ 31.300284] split_vma+0xc6/0x110 [ 31.300722] mprotect_fixup+0x8d2/0xb30 [ 31.301212] do_mprotect_pkey+0x87e/0xd40 [ 31.301732] __x64_sys_mprotect+0x78/0xc0 [ 31.302261] do_syscall_64+0x3f/0x90 [ 31.302744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.303377] [ 31.303594] Freed by task 213: [ 31.303986] kasan_save_stack+0x22/0x50 [ 31.304483] kasan_set_track+0x25/0x30 [ 31.304969] kasan_save_free_info+0x2b/0x50 [ 31.305494] __kasan_slab_free+0x10a/0x190 [ 31.306027] kmem_cache_free+0x10d/0x4d0 [ 31.306530] rcu_core+0x8c8/0x2860 [ 31.306992] __do_softirq+0x1b7/0x7d4 [ 31.307478] [ 31.307690] Last potentially related work creation: [ 31.308274] kasan_save_stack+0x22/0x50 [ 31.308780] __kasan_record_aux_stack+0x8e/0xa0 [ 31.309363] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.309993] remove_vma+0x139/0x170 [ 31.310434] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.311047] do_vmi_munmap+0x1f1/0x2b0 [ 31.311537] __vm_munmap+0x138/0x3a0 [ 31.311995] __x64_sys_munmap+0x59/0x80 [ 31.312483] do_syscall_64+0x3f/0x90 [ 31.312953] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.313584] [ 31.313797] The buggy address belongs to the object at ffff888015fd5e80 [ 31.313797] which belongs to the cache vm_area_struct of size 168 [ 31.315249] The buggy address is located 88 bytes inside of [ 31.315249] freed 168-byte region [ffff888015fd5e80, ffff888015fd5f28) [ 31.316637] [ 31.316852] The buggy address belongs to the physical page: [ 31.317530] page:0000000024e3c2d5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15fd5 [ 31.318646] memcg:ffff8880094d5d01 [ 31.319071] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.319705] page_type: 0xffffffff() [ 31.320150] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.321052] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094d5d01 [ 31.321954] page dumped because: kasan: bad access detected [ 31.322603] [ 31.322836] Memory state around the buggy address: [ 31.323406] ffff888015fd5d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.324251] ffff888015fd5e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.325093] >ffff888015fd5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.325939] ^ [ 31.326657] ffff888015fd5f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.327502] ffff888015fd5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.328341] ================================================================== [ 31.329247] Disabling lock debugging due to kernel taint [ 33.581990] BUG: Bad rss-counter state mm:00000000769acc58 type:MM_FILEPAGES val:33 [ 33.582837] BUG: Bad rss-counter state mm:00000000769acc58 type:MM_ANONPAGES val:22 [ 34.067768] BUG: Bad rss-counter state mm:00000000f89e9fd6 type:MM_FILEPAGES val:33 [ 34.068866] BUG: Bad rss-counter state mm:00000000f89e9fd6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39044' (ECDSA) to the list of known hosts. 2023/06/20 05:48:18 fuzzer started 2023/06/20 05:48:19 dialing manager at localhost:44161 2023/06/20 05:48:19 checking machine... 2023/06/20 05:48:19 checking revisions... [ 34.767031] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:48:19 testing simple program... [ 34.809369] cgroup: Unknown subsys name 'net' [ 34.862690] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:48:18 Registers: info registers vcpu 0 RAX=000000007fffffff RBX=00007fcc5529a560 RCX=0000000000000009 RDX=000000000000006c RSI=00007fcc54c8e000 RDI=0000560fd4ea3409 RBP=00007ffeb66a3870 RSP=00007ffeb66a3320 R8 =00000000ffffffff R9 =0000000000000009 R10=00007fcc54c8e000 R11=0000000000000000 R12=00007ffeb66a3880 R13=00007fcc54c8e07e R14=00007ffeb66a39c0 R15=0000000000000009 RIP=00007fcc55144365 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fcc54ce6900 00000000 00000000 GS =0000 0000000000000000 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=00007fcc5529e0b0 CR3=0000000015f38000 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=ff0000000000ff000000000000000000 XMM02=0000000000000000000000000000ff00 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6d2064656d726f6620796c646162006e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffffffd698a1d RBX=ffffffff85fa377c RCX=ffffffff8363c1b0 RDX=0000000000000000 RSI=ffffffff863b192a RDI=ffffffff85fa3768 RBP=ffffffff85fa3768 RSP=ffff88801662f8f0 R8 =ffffffff863b192a R9 =ffff88801662f9e8 R10=0000000000038001 R11=000000000008a8e5 R12=ffffffff85fa3794 R13=ffffffff85fa3768 R14=ffffffff85fa3768 R15=dffffc0000000000 RIP=ffffffff8112fc93 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 00007fcc54ce6900 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=00007f1d52ce5580 CR3=0000000015f38000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000