syzkaller login: [ 30.143865] BUG: Bad rss-counter state mm:00000000e0c56eb3 type:MM_FILEPAGES val:33 [ 30.144906] BUG: Bad rss-counter state mm:00000000e0c56eb3 type:MM_ANONPAGES val:22 [ 30.304513] ================================================================== [ 30.305416] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.306340] Read of size 8 at addr ffff8880144633f8 by task sshd/219 [ 30.307197] [ 30.307418] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.308266] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.309279] Call Trace: [ 30.309592] <TASK> [ 30.309870] dump_stack_lvl+0x91/0xf0 [ 30.310355] print_report+0xcc/0x620 [ 30.310834] ? __virt_addr_valid+0x102/0x340 [ 30.311387] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.311999] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.312605] kasan_report+0xbe/0xf0 [ 30.313079] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.313693] vma_interval_tree_remove+0xc75/0xec0 [ 30.314290] vma_prepare+0xc54/0x11a0 [ 30.314762] __split_vma+0x5af/0x950 [ 30.315228] ? __pfx___split_vma+0x10/0x10 [ 30.315749] ? find_held_lock+0x2c/0x110 [ 30.316262] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.316836] ? lock_is_held_type+0x9f/0x120 [ 30.317373] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.317979] ? mtree_range_walk+0x632/0x900 [ 30.318530] ? mas_walk+0x5c7/0x7c0 [ 30.319002] do_vmi_munmap+0x1f1/0x2b0 [ 30.319488] mmap_region+0x1f9/0x2660 [ 30.319965] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.320474] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.321191] ? __pfx_lock_acquire+0x10/0x10 [ 30.321711] ? __pfx_mmap_region+0x10/0x10 [ 30.322243] ? security_mmap_addr+0x7d/0xa0 [ 30.322771] ? get_unmapped_area+0x1f5/0x3f0 [ 30.323323] do_mmap+0x854/0xf00 [ 30.323758] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.324246] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.324804] ksys_mmap_pgoff+0x3af/0x500 [ 30.325308] do_syscall_64+0x3f/0x90 [ 30.325776] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.326412] RIP: 0033:0x7f66d2162d82 [ 30.326858] 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 [ 30.328981] RSP: 002b:00007ffe90f790a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.329872] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f66d2162d82 [ 30.330704] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f66d159c000 [ 30.331535] RBP: 00007f66d159c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.332367] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dc4ae47f70 [ 30.333203] R13: 00007ffe90f790c0 R14: 00007ffe90f790f0 R15: 00007ffe90f79450 [ 30.334037] </TASK> [ 30.334323] [ 30.334534] Allocated by task 212: [ 30.334953] kasan_save_stack+0x22/0x50 [ 30.335448] kasan_set_track+0x25/0x30 [ 30.335931] __kasan_slab_alloc+0x59/0x70 [ 30.336445] kmem_cache_alloc+0x16b/0x370 [ 30.336966] vm_area_dup+0x20/0x160 [ 30.337412] __split_vma+0x170/0x950 [ 30.337878] split_vma+0xc6/0x110 [ 30.338320] mprotect_fixup+0x8d2/0xb30 [ 30.338813] do_mprotect_pkey+0x87e/0xd40 [ 30.339329] __x64_sys_mprotect+0x78/0xc0 [ 30.339846] do_syscall_64+0x3f/0x90 [ 30.340314] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.340968] [ 30.341188] Freed by task 212: [ 30.341579] kasan_save_stack+0x22/0x50 [ 30.342071] kasan_set_track+0x25/0x30 [ 30.342559] kasan_save_free_info+0x2b/0x50 [ 30.343076] __kasan_slab_free+0x10a/0x190 [ 30.343603] kmem_cache_free+0x10d/0x4d0 [ 30.344102] rcu_core+0x8c8/0x2860 [ 30.344535] __do_softirq+0x1b7/0x7d4 [ 30.345018] [ 30.345228] Last potentially related work creation: [ 30.345807] kasan_save_stack+0x22/0x50 [ 30.346304] __kasan_record_aux_stack+0x8e/0xa0 [ 30.346865] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.347505] remove_vma+0x139/0x170 [ 30.347945] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.348492] do_vmi_munmap+0x1f1/0x2b0 [ 30.348982] __vm_munmap+0x138/0x3a0 [ 30.349441] __x64_sys_munmap+0x59/0x80 [ 30.349933] do_syscall_64+0x3f/0x90 [ 30.350399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.351036] [ 30.351253] The buggy address belongs to the object at ffff8880144633a0 [ 30.351253] which belongs to the cache vm_area_struct of size 168 [ 30.352695] The buggy address is located 88 bytes inside of [ 30.352695] freed 168-byte region [ffff8880144633a0, ffff888014463448) [ 30.354088] [ 30.354300] The buggy address belongs to the physical page: [ 30.354961] page:000000006b4cbd7f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14463 [ 30.356053] memcg:ffff88801441e501 [ 30.356485] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.357160] page_type: 0xffffffff() [ 30.357626] raw: 0100000000000200 ffff8880087a0c80 ffffea0000311d80 dead000000000004 [ 30.358588] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801441e501 [ 30.359517] page dumped because: kasan: bad access detected [ 30.360199] [ 30.360427] Memory state around the buggy address: [ 30.361026] ffff888014463280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.361926] ffff888014463300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.362808] >ffff888014463380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.363684] ^ [ 30.364550] ffff888014463400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.365443] ffff888014463480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.366322] ================================================================== [ 30.367305] Disabling lock debugging due to kernel taint [ 32.308601] BUG: Bad rss-counter state mm:00000000c0b0e0f1 type:MM_FILEPAGES val:33 [ 32.309844] BUG: Bad rss-counter state mm:00000000c0b0e0f1 type:MM_ANONPAGES val:22 [ 32.693387] BUG: Bad rss-counter state mm:00000000190fa489 type:MM_FILEPAGES val:33 [ 32.694397] BUG: Bad rss-counter state mm:00000000190fa489 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48444' (ECDSA) to the list of known hosts. 2023/06/20 20:04:35 fuzzer started 2023/06/20 20:04:36 dialing manager at localhost:36067 2023/06/20 20:04:36 checking machine... 2023/06/20 20:04:36 checking revisions... [ 33.372973] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:04:36 testing simple program... [ 33.427961] cgroup: Unknown subsys name 'net' [ 33.478428] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:04:35 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11003047cc0 RSI=ffffffff81895241 RDI=ffff8880087b83c0 RBP=000055c78b61d4a0 RSP=ffff88800daafd68 R8 =ffff88800daafd20 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88801823e600 R13=0000000000000000 R14=ffff88801823e620 R15=ffffffff85d3e300 RIP=ffffffff81895265 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 00007f65d0293900 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=00007f544fa12650 CR3=000000000c81a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f23ba67560b956fd00000000000ae988 XMM05=c004e2589c9387ca0000000000132d58 XMM06=806171799158d9670000000000131b48 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=ffff888008c04400 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=00007fffdf9963e8 CR3=000000000df94000 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=2035333a34303a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a34303a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000