syzkaller login: [ 34.192831] BUG: Bad rss-counter state mm:00000000ff524851 type:MM_FILEPAGES val:33 [ 34.194585] BUG: Bad rss-counter state mm:00000000ff524851 type:MM_ANONPAGES val:22 [ 34.376768] ================================================================== [ 34.377715] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.378689] Read of size 8 at addr ffff88800e813b38 by task sshd/221 [ 34.379606] [ 34.379834] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.380731] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.381771] Call Trace: [ 34.382086] [ 34.382431] dump_stack_lvl+0x91/0xf0 [ 34.382923] print_report+0xcc/0x620 [ 34.383503] ? __virt_addr_valid+0x102/0x340 [ 34.384068] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.384760] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.385466] kasan_report+0xbe/0xf0 [ 34.385953] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.386667] vma_interval_tree_remove+0xc75/0xec0 [ 34.387333] vma_prepare+0xc54/0x11a0 [ 34.387858] __split_vma+0x5af/0x950 [ 34.388404] ? __pfx___split_vma+0x10/0x10 [ 34.388939] ? find_held_lock+0x2c/0x110 [ 34.389544] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.390135] ? lock_is_held_type+0x9f/0x120 [ 34.390821] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.391521] ? mtree_range_walk+0x632/0x900 [ 34.392078] ? mas_walk+0x5c7/0x7c0 [ 34.392624] do_vmi_munmap+0x1f1/0x2b0 [ 34.393143] mmap_region+0x1f9/0x2660 [ 34.393707] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.394291] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.395253] ? __pfx_lock_acquire+0x10/0x10 [ 34.395967] ? __pfx_mmap_region+0x10/0x10 [ 34.396681] ? security_mmap_addr+0x7d/0xa0 [ 34.397395] ? get_unmapped_area+0x1f5/0x3f0 [ 34.398134] do_mmap+0x854/0xf00 [ 34.398681] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.399213] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.399798] ksys_mmap_pgoff+0x3af/0x500 [ 34.400328] do_syscall_64+0x3f/0x90 [ 34.400830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.401505] RIP: 0033:0x7f4925130d82 [ 34.401971] 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 [ 34.404199] RSP: 002b:00007fff8145f7e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.405135] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4925130d82 [ 34.406042] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f492456a000 [ 34.406967] RBP: 00007f492456a000 R08: 0000000000000009 R09: 0000000000001000 [ 34.407866] R10: 0000000000000812 R11: 0000000000000206 R12: 00005604481afec0 [ 34.408772] R13: 00007fff8145f800 R14: 00007fff8145f830 R15: 00007fff8145fb90 [ 34.409683] [ 34.409989] [ 34.410255] Allocated by task 214: [ 34.410718] kasan_save_stack+0x22/0x50 [ 34.411272] kasan_set_track+0x25/0x30 [ 34.411788] __kasan_slab_alloc+0x59/0x70 [ 34.412354] kmem_cache_alloc+0x16b/0x370 [ 34.412892] vm_area_dup+0x20/0x160 [ 34.413385] __split_vma+0x170/0x950 [ 34.413869] split_vma+0xc6/0x110 [ 34.414358] mprotect_fixup+0x8d2/0xb30 [ 34.414900] do_mprotect_pkey+0x87e/0xd40 [ 34.415462] __x64_sys_mprotect+0x78/0xc0 [ 34.416007] do_syscall_64+0x3f/0x90 [ 34.416510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.417204] [ 34.417440] Freed by task 13: [ 34.417845] kasan_save_stack+0x22/0x50 [ 34.418400] kasan_set_track+0x25/0x30 [ 34.418930] kasan_save_free_info+0x2b/0x50 [ 34.419512] __kasan_slab_free+0x10a/0x190 [ 34.420069] kmem_cache_free+0x10d/0x4d0 [ 34.420608] rcu_core+0x8c8/0x2860 [ 34.421065] __do_softirq+0x1b7/0x7d4 [ 34.421576] [ 34.421819] Last potentially related work creation: [ 34.422466] kasan_save_stack+0x22/0x50 [ 34.423012] __kasan_record_aux_stack+0x8e/0xa0 [ 34.423618] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.424303] remove_vma+0x139/0x170 [ 34.424781] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.425376] do_vmi_munmap+0x1f1/0x2b0 [ 34.425883] __vm_munmap+0x138/0x3a0 [ 34.426396] __x64_sys_munmap+0x59/0x80 [ 34.426922] do_syscall_64+0x3f/0x90 [ 34.427447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.428122] [ 34.428363] The buggy address belongs to the object at ffff88800e813ae0 [ 34.428363] which belongs to the cache vm_area_struct of size 168 [ 34.429893] The buggy address is located 88 bytes inside of [ 34.429893] freed 168-byte region [ffff88800e813ae0, ffff88800e813b88) [ 34.431404] [ 34.431646] The buggy address belongs to the physical page: [ 34.432360] page:000000006a4354ce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe813 [ 34.433493] memcg:ffff8880166d5901 [ 34.433952] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.434669] page_type: 0xffffffff() [ 34.435159] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.436130] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880166d5901 [ 34.437084] page dumped because: kasan: bad access detected [ 34.437796] [ 34.438038] Memory state around the buggy address: [ 34.438698] ffff88800e813a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.439601] ffff88800e813a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 34.440512] >ffff88800e813b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.441428] ^ [ 34.442053] ffff88800e813b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 34.442930] ffff88800e813c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.443766] ================================================================== [ 34.444806] Disabling lock debugging due to kernel taint [ 37.223949] BUG: Bad rss-counter state mm:0000000068206e89 type:MM_FILEPAGES val:33 [ 37.224980] BUG: Bad rss-counter state mm:0000000068206e89 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9183' (ECDSA) to the list of known hosts. [ 37.823448] BUG: Bad rss-counter state mm:00000000bfbd77b3 type:MM_FILEPAGES val:33 [ 37.824640] BUG: Bad rss-counter state mm:00000000bfbd77b3 type:MM_ANONPAGES val:22 2023/06/19 19:06:58 fuzzer started 2023/06/19 19:06:58 dialing manager at localhost:44161 2023/06/19 19:06:58 checking machine... 2023/06/19 19:06:58 checking revisions... [ 38.374892] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:06:58 testing simple program... [ 38.422287] cgroup: Unknown subsys name 'net' [ 38.483077] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:06:55 Registers: info registers vcpu 0 RAX=000000000003de00 RBX=0000000000092cc0 RCX=ffffffff81534376 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff888010357570 RSP=ffff8880103574b0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800844f780 R13=0000000000000000 R14=0000000000000246 R15=ffff88806ce3de00 RIP=ffffffff81806c6f RFL=00000002 [-------] 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 00007fe5d6f44900 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=00007f476bcb6650 CR3=000000000d66e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=6ab8b5ac6d56bb4f00000000000ae988 XMM05=6de367e3576fea5e00000000001358e0 XMM06=59d5b690e0af863b0000000000134778 XMM07=fb795ef6d65770560000000000124c18 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00005580eec43000 CR3=00000000164e4000 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=2038353a36303a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a36303a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000