syzkaller login: [ 31.279000] BUG: Bad rss-counter state mm:00000000f11c6cea type:MM_FILEPAGES val:33 [ 31.280239] BUG: Bad rss-counter state mm:00000000f11c6cea type:MM_ANONPAGES val:22 [ 31.325790] ================================================================== [ 31.327069] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.328223] Read of size 8 at addr ffff88800f2de798 by task sshd/220 [ 31.329207] [ 31.329475] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.330565] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.331756] Call Trace: [ 31.332151] [ 31.332503] dump_stack_lvl+0x91/0xf0 [ 31.333112] print_report+0xcc/0x620 [ 31.333703] ? __virt_addr_valid+0x102/0x340 [ 31.334390] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.335018] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.335639] kasan_report+0xbe/0xf0 [ 31.336124] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.336762] vma_interval_tree_remove+0xc75/0xec0 [ 31.337374] vma_prepare+0xc54/0x11a0 [ 31.337865] __split_vma+0x5af/0x950 [ 31.338344] ? __pfx___split_vma+0x10/0x10 [ 31.338881] ? find_held_lock+0x2c/0x110 [ 31.339409] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.339971] ? lock_is_held_type+0x9f/0x120 [ 31.340507] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.341120] ? mtree_range_walk+0x632/0x900 [ 31.341670] ? mas_walk+0x5c7/0x7c0 [ 31.342151] do_vmi_munmap+0x1f1/0x2b0 [ 31.342657] mmap_region+0x1f9/0x2660 [ 31.343143] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.343658] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.344380] ? __pfx_lock_acquire+0x10/0x10 [ 31.344916] ? __pfx_mmap_region+0x10/0x10 [ 31.345442] ? security_mmap_addr+0x7d/0xa0 [ 31.345985] ? get_unmapped_area+0x1f5/0x3f0 [ 31.346539] do_mmap+0x854/0xf00 [ 31.346984] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.347479] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.348039] ksys_mmap_pgoff+0x3af/0x500 [ 31.348550] do_syscall_64+0x3f/0x90 [ 31.349033] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.349689] RIP: 0033:0x7f19117acd82 [ 31.350154] 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 [ 31.352300] RSP: 002b:00007ffdede1e808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.353216] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f19117acd82 [ 31.354097] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1910be6000 [ 31.354948] RBP: 00007f1910be6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.355812] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a44006fec0 [ 31.356668] R13: 00007ffdede1e820 R14: 00007ffdede1e850 R15: 00007ffdede1ebb0 [ 31.357525] [ 31.357839] [ 31.358054] Allocated by task 213: [ 31.358503] kasan_save_stack+0x22/0x50 [ 31.359042] kasan_set_track+0x25/0x30 [ 31.359557] __kasan_slab_alloc+0x59/0x70 [ 31.360088] kmem_cache_alloc+0x16b/0x370 [ 31.360628] vm_area_dup+0x20/0x160 [ 31.361094] __split_vma+0x170/0x950 [ 31.361565] split_vma+0xc6/0x110 [ 31.362016] mprotect_fixup+0x8d2/0xb30 [ 31.362529] do_mprotect_pkey+0x87e/0xd40 [ 31.363055] __x64_sys_mprotect+0x78/0xc0 [ 31.363581] do_syscall_64+0x3f/0x90 [ 31.364068] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.364712] [ 31.364929] Freed by task 13: [ 31.365320] kasan_save_stack+0x22/0x50 [ 31.365848] kasan_set_track+0x25/0x30 [ 31.366347] kasan_save_free_info+0x2b/0x50 [ 31.366971] __kasan_slab_free+0x10a/0x190 [ 31.367505] kmem_cache_free+0x10d/0x4d0 [ 31.368011] rcu_core+0x8c8/0x2860 [ 31.368468] __do_softirq+0x1b7/0x7d4 [ 31.368947] [ 31.369165] Last potentially related work creation: [ 31.369773] kasan_save_stack+0x22/0x50 [ 31.370301] __kasan_record_aux_stack+0x8e/0xa0 [ 31.370905] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.371556] remove_vma+0x139/0x170 [ 31.372013] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.372571] do_vmi_munmap+0x1f1/0x2b0 [ 31.373061] __vm_munmap+0x138/0x3a0 [ 31.373562] __x64_sys_munmap+0x59/0x80 [ 31.374085] do_syscall_64+0x3f/0x90 [ 31.374558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.375206] [ 31.375427] Second to last potentially related work creation: [ 31.376116] kasan_save_stack+0x22/0x50 [ 31.376630] __kasan_record_aux_stack+0x8e/0xa0 [ 31.377245] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.377928] remove_vma+0x139/0x170 [ 31.378393] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.378959] do_vmi_munmap+0x1f1/0x2b0 [ 31.379451] mmap_region+0x1f9/0x2660 [ 31.379928] do_mmap+0x854/0xf00 [ 31.380366] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.380867] ksys_mmap_pgoff+0x3af/0x500 [ 31.381370] do_syscall_64+0x3f/0x90 [ 31.381847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.382507] [ 31.382722] The buggy address belongs to the object at ffff88800f2de740 [ 31.382722] which belongs to the cache vm_area_struct of size 168 [ 31.384200] The buggy address is located 88 bytes inside of [ 31.384200] freed 168-byte region [ffff88800f2de740, ffff88800f2de7e8) [ 31.385641] [ 31.385877] The buggy address belongs to the physical page: [ 31.386541] page:00000000a6cf1c10 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2de [ 31.387634] memcg:ffff88800c8bae01 [ 31.388064] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.388715] page_type: 0xffffffff() [ 31.389166] raw: 0100000000000200 ffff88800879fc80 ffffea0000394140 dead000000000004 [ 31.390094] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c8bae01 [ 31.391003] page dumped because: kasan: bad access detected [ 31.391668] [ 31.391886] Memory state around the buggy address: [ 31.392465] ffff88800f2de680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.393325] ffff88800f2de700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.394194] >ffff88800f2de780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.395046] ^ [ 31.395551] ffff88800f2de800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.396410] ffff88800f2de880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.397262] ================================================================== [ 31.398207] Disabling lock debugging due to kernel taint [ 33.817401] BUG: Bad rss-counter state mm:000000009d89a081 type:MM_FILEPAGES val:33 [ 33.818754] BUG: Bad rss-counter state mm:000000009d89a081 type:MM_ANONPAGES val:22 [ 34.309607] BUG: Bad rss-counter state mm:0000000070f02c6a type:MM_FILEPAGES val:33 [ 34.310747] BUG: Bad rss-counter state mm:0000000070f02c6a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35288' (ECDSA) to the list of known hosts. 2023/06/19 15:58:11 fuzzer started 2023/06/19 15:58:11 dialing manager at localhost:44161 2023/06/19 15:58:11 checking machine... 2023/06/19 15:58:11 checking revisions... [ 35.038794] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:58:11 testing simple program... [ 35.102498] cgroup: Unknown subsys name 'net' [ 35.159202] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:58:09 Registers: info registers vcpu 0 RAX=1ffff110011aff5c RBX=0000000000000006 RCX=0000000000000001 RDX=0000000000000000 RSI=000000000000000b RDI=ffff888008d7fae0 RBP=dffffc0000000000 RSP=ffff888008d7fa20 R8 =ffffffff86072abc R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000000128 R12=000000000000000b R13=0000000000000000 R14=ffff888008d7fab0 R15=ffff88800eebc2e0 RIP=ffffffff813ad5ca 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 0000000000000000 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=00007ffce8499c48 CR3=0000000018f08000 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=2030313a38353a3531203931206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a383031303520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a38353a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fbfbfbfbfbfbfbfb RBX=0000000000000000 RCX=0000000000000003 RDX=0000000000000018 RSI=00000000000000fb RDI=ffffed100395aba8 RBP=ffffffff813782a8 RSP=ffff888008e57ce0 R8 =0000000000000006 R9 =0000000000000002 R10=ffffed100395aba2 R11=0000000000000128 R12=ffff88801cad5d10 R13=ffff88800844f780 R14=ffffffff813782a8 R15=ffff88801cad5d90 RIP=ffffffff8450d43a RFL=00000216 [----AP-] 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 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=00007f84b5577650 CR3=000000001c9b2000 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=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