syzkaller login: [ 24.213976] BUG: Bad rss-counter state mm:0000000069afc9c2 type:MM_FILEPAGES val:33 [ 24.215200] BUG: Bad rss-counter state mm:0000000069afc9c2 type:MM_ANONPAGES val:22 [ 24.259430] ================================================================== [ 24.260633] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.262077] Read of size 8 at addr ffff88800dcf6d08 by task sshd/219 [ 24.262861] [ 24.263077] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.263962] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.264971] Call Trace: [ 24.265289] [ 24.265572] dump_stack_lvl+0x91/0xf0 [ 24.266085] print_report+0xcc/0x620 [ 24.266574] ? __virt_addr_valid+0x102/0x340 [ 24.267157] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.267785] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.268407] kasan_report+0xbe/0xf0 [ 24.268885] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.269515] vma_interval_tree_remove+0xc75/0xec0 [ 24.270133] vma_prepare+0xc54/0x11a0 [ 24.270613] __split_vma+0x5af/0x950 [ 24.271087] ? __pfx___split_vma+0x10/0x10 [ 24.271620] ? find_held_lock+0x2c/0x110 [ 24.272146] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.272714] ? lock_is_held_type+0x9f/0x120 [ 24.273256] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.273887] ? mtree_range_walk+0x632/0x900 [ 24.274442] ? mas_walk+0x5c7/0x7c0 [ 24.274926] do_vmi_munmap+0x1f1/0x2b0 [ 24.275420] mmap_region+0x1f9/0x2660 [ 24.275907] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.276464] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.277192] ? __pfx_lock_acquire+0x10/0x10 [ 24.277745] ? __pfx_mmap_region+0x10/0x10 [ 24.278289] ? security_mmap_addr+0x7d/0xa0 [ 24.278850] ? get_unmapped_area+0x1f5/0x3f0 [ 24.279420] do_mmap+0x854/0xf00 [ 24.279860] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.280380] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.280963] ksys_mmap_pgoff+0x3af/0x500 [ 24.281484] do_syscall_64+0x3f/0x90 [ 24.281977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.282634] RIP: 0033:0x7f017bf69d82 [ 24.283095] 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 [ 24.285240] RSP: 002b:00007ffdfe1f0d28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.286175] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f017bf69d82 [ 24.287046] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f017b3a3000 [ 24.287939] RBP: 00007f017b3a3000 R08: 0000000000000009 R09: 0000000000001000 [ 24.288826] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d1d7c25f70 [ 24.289724] R13: 00007ffdfe1f0d40 R14: 00007ffdfe1f0d70 R15: 00007ffdfe1f10d0 [ 24.290609] [ 24.290911] [ 24.291132] Allocated by task 212: [ 24.291579] kasan_save_stack+0x22/0x50 [ 24.292100] kasan_set_track+0x25/0x30 [ 24.292597] __kasan_slab_alloc+0x59/0x70 [ 24.293122] kmem_cache_alloc+0x16b/0x370 [ 24.293683] vm_area_dup+0x20/0x160 [ 24.294168] __split_vma+0x170/0x950 [ 24.294662] split_vma+0xc6/0x110 [ 24.295112] mprotect_fixup+0x8d2/0xb30 [ 24.295618] do_mprotect_pkey+0x87e/0xd40 [ 24.296181] __x64_sys_mprotect+0x78/0xc0 [ 24.296753] do_syscall_64+0x3f/0x90 [ 24.297258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.297946] [ 24.298168] Freed by task 13: [ 24.298566] kasan_save_stack+0x22/0x50 [ 24.299084] kasan_set_track+0x25/0x30 [ 24.299599] kasan_save_free_info+0x2b/0x50 [ 24.300153] __kasan_slab_free+0x10a/0x190 [ 24.300694] kmem_cache_free+0x10d/0x4d0 [ 24.301232] rcu_core+0x8c8/0x2860 [ 24.301712] __do_softirq+0x1b7/0x7d4 [ 24.302207] [ 24.302425] Last potentially related work creation: [ 24.303014] kasan_save_stack+0x22/0x50 [ 24.303543] __kasan_record_aux_stack+0x8e/0xa0 [ 24.304135] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.304859] remove_vma+0x139/0x170 [ 24.305314] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.305896] do_vmi_munmap+0x1f1/0x2b0 [ 24.306383] __vm_munmap+0x138/0x3a0 [ 24.306871] __x64_sys_munmap+0x59/0x80 [ 24.307384] do_syscall_64+0x3f/0x90 [ 24.307868] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.308540] [ 24.308759] Second to last potentially related work creation: [ 24.309476] kasan_save_stack+0x22/0x50 [ 24.310004] __kasan_record_aux_stack+0x8e/0xa0 [ 24.310616] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.311281] remove_vma+0x139/0x170 [ 24.311733] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.312303] do_vmi_munmap+0x1f1/0x2b0 [ 24.312796] mmap_region+0x1f9/0x2660 [ 24.313282] do_mmap+0x854/0xf00 [ 24.313737] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.314231] ksys_mmap_pgoff+0x3af/0x500 [ 24.314740] do_syscall_64+0x3f/0x90 [ 24.315227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.315883] [ 24.316114] The buggy address belongs to the object at ffff88800dcf6cb0 [ 24.316114] which belongs to the cache vm_area_struct of size 168 [ 24.317672] The buggy address is located 88 bytes inside of [ 24.317672] freed 168-byte region [ffff88800dcf6cb0, ffff88800dcf6d58) [ 24.319171] [ 24.319393] The buggy address belongs to the physical page: [ 24.320080] page:0000000067cb9edc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcf6 [ 24.321215] memcg:ffff88800dae0901 [ 24.321665] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.322326] page_type: 0xffffffff() [ 24.322786] raw: 0100000000000200 ffff8880087a0c80 ffffea00003cadc0 dead000000000008 [ 24.323739] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dae0901 [ 24.324684] page dumped because: kasan: bad access detected [ 24.325366] [ 24.325587] Memory state around the buggy address: [ 24.326206] ffff88800dcf6c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.327086] ffff88800dcf6c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.327960] >ffff88800dcf6d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.328830] ^ [ 24.329274] ffff88800dcf6d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.330176] ffff88800dcf6e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.331070] ================================================================== [ 24.332155] Disabling lock debugging due to kernel taint [ 26.832577] BUG: Bad rss-counter state mm:000000005b6e8749 type:MM_FILEPAGES val:33 [ 26.833711] BUG: Bad rss-counter state mm:000000005b6e8749 type:MM_ANONPAGES val:22 [ 27.229257] BUG: Bad rss-counter state mm:0000000054efdff1 type:MM_FILEPAGES val:33 [ 27.230271] BUG: Bad rss-counter state mm:0000000054efdff1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62546' (ECDSA) to the list of known hosts. 2023/06/20 17:58:08 fuzzer started 2023/06/20 17:58:08 dialing manager at localhost:36067 2023/06/20 17:58:08 checking machine... 2023/06/20 17:58:08 checking revisions... [ 27.957979] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:58:08 testing simple program... [ 28.004353] cgroup: Unknown subsys name 'net' [ 28.070558] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:58:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f6ca639bf18 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=00007f6ca639bf18 RSP=ffff8880166e7598 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880166e76b0 R13=0000000000000000 R14=ffffffff85652c08 R15=0000000000092cc0 RIP=ffffffff814c85a0 RFL=00000282 [--S----] 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 00007f6ca5eb4900 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=00007f6ca646c0b0 CR3=000000001bc68000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fab88f2ac10 CR3=000000000caaa000 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=e477d2b1c783c8b5fd468ee62dc955c5 XMM02=ec2efd57dc4c00df000000000011b718 XMM03=46a647fd5706b0f2000000000011b7e8 XMM04=a3d1ff254fe470f500000000000ae988 XMM05=dfcdbad4f1609c370000000000132be8 XMM06=67ca0d904af03df90000000000131dc0 XMM07=e042d86d42eb936e0000000000121d10 XMM08=46a647fd5706b0f2000000000011b7e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000