syzkaller login: [ 43.622978] BUG: Bad rss-counter state mm:00000000e150fdea type:MM_FILEPAGES val:33 [ 43.623631] BUG: Bad rss-counter state mm:00000000e150fdea type:MM_ANONPAGES val:22 [ 43.795831] ================================================================== [ 43.796440] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.797041] Read of size 8 at addr ffff88800c593b38 by task sshd/219 [ 43.797530] [ 43.797677] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.798241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.798889] Call Trace: [ 43.799114] [ 43.799304] dump_stack_lvl+0x91/0xf0 [ 43.799638] print_report+0xcc/0x620 [ 43.799964] ? __virt_addr_valid+0x102/0x340 [ 43.800331] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.800741] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.801149] kasan_report+0xbe/0xf0 [ 43.801466] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.801883] vma_interval_tree_remove+0xc75/0xec0 [ 43.802283] vma_prepare+0xc54/0x11a0 [ 43.802602] __split_vma+0x5af/0x950 [ 43.810917] ? __pfx___split_vma+0x10/0x10 [ 43.823225] ? find_held_lock+0x2c/0x110 [ 43.827216] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.827558] ? lock_is_held_type+0x9f/0x120 [ 43.827919] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.828267] ? mtree_range_walk+0x632/0x900 [ 43.828588] ? mas_walk+0x5c7/0x7c0 [ 43.828860] do_vmi_munmap+0x1f1/0x2b0 [ 43.829144] mmap_region+0x1f9/0x2660 [ 43.829419] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.829719] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.830133] ? __pfx_lock_acquire+0x10/0x10 [ 43.830450] ? __pfx_mmap_region+0x10/0x10 [ 43.830763] ? security_mmap_addr+0x7d/0xa0 [ 43.842965] ? get_unmapped_area+0x1f5/0x3f0 [ 43.843305] do_mmap+0x854/0xf00 [ 43.843567] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.843864] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.844195] ksys_mmap_pgoff+0x3af/0x500 [ 43.844496] do_syscall_64+0x3f/0x90 [ 43.844784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.845169] RIP: 0033:0x7f34596b4d82 [ 43.845436] 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 [ 43.846680] RSP: 002b:00007ffe11abc578 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.851395] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f34596b4d82 [ 43.851893] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3458aee000 [ 43.852386] RBP: 00007f3458aee000 R08: 0000000000000009 R09: 0000000000001000 [ 43.852877] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564140747f70 [ 43.853369] R13: 00007ffe11abc590 R14: 00007ffe11abc5c0 R15: 00007ffe11abc920 [ 43.853902] [ 43.854074] [ 43.854201] Allocated by task 212: [ 43.854453] kasan_save_stack+0x22/0x50 [ 43.854758] kasan_set_track+0x25/0x30 [ 43.863164] __kasan_slab_alloc+0x59/0x70 [ 43.863490] kmem_cache_alloc+0x16b/0x370 [ 43.863800] vm_area_dup+0x20/0x160 [ 43.864070] __split_vma+0x170/0x950 [ 43.864349] split_vma+0xc6/0x110 [ 43.864605] mprotect_fixup+0x8d2/0xb30 [ 43.864901] do_mprotect_pkey+0x87e/0xd40 [ 43.865225] __x64_sys_mprotect+0x78/0xc0 [ 43.865546] do_syscall_64+0x3f/0x90 [ 43.865901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.866314] [ 43.866449] Freed by task 19: [ 43.866701] kasan_save_stack+0x22/0x50 [ 43.867263] kasan_set_track+0x25/0x30 [ 43.867588] kasan_save_free_info+0x2b/0x50 [ 43.867924] __kasan_slab_free+0x10a/0x190 [ 43.868281] kmem_cache_free+0x10d/0x4d0 [ 43.868616] rcu_core+0x8c8/0x2860 [ 43.869188] __do_softirq+0x1b7/0x7d4 [ 43.869509] [ 43.869656] Last potentially related work creation: [ 43.870059] kasan_save_stack+0x22/0x50 [ 43.870378] __kasan_record_aux_stack+0x8e/0xa0 [ 43.870770] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.871599] remove_vma+0x139/0x170 [ 43.872167] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.872531] do_vmi_munmap+0x1f1/0x2b0 [ 43.872855] __vm_munmap+0x138/0x3a0 [ 43.873161] __x64_sys_munmap+0x59/0x80 [ 43.873482] do_syscall_64+0x3f/0x90 [ 43.873787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.874207] [ 43.874350] Second to last potentially related work creation: [ 43.874798] kasan_save_stack+0x22/0x50 [ 43.875996] __kasan_record_aux_stack+0x8e/0xa0 [ 43.877091] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.878248] remove_vma+0x139/0x170 [ 43.879100] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.880104] do_vmi_munmap+0x1f1/0x2b0 [ 43.881020] mmap_region+0x1f9/0x2660 [ 43.881907] do_mmap+0x854/0xf00 [ 43.882631] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.884128] ksys_mmap_pgoff+0x7d/0x500 [ 43.885061] do_syscall_64+0x3f/0x90 [ 43.885999] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.887285] [ 43.887628] The buggy address belongs to the object at ffff88800c593ae0 [ 43.887628] which belongs to the cache vm_area_struct of size 168 [ 43.890485] The buggy address is located 88 bytes inside of [ 43.890485] freed 168-byte region [ffff88800c593ae0, ffff88800c593b88) [ 43.893318] [ 43.893673] The buggy address belongs to the physical page: [ 43.895564] page:0000000064ca85ef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc593 [ 43.897721] memcg:ffff88800cac3c01 [ 43.898522] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 43.899925] page_type: 0xffffffff() [ 43.900695] raw: 0100000000000200 ffff88800879fc80 ffffea00003860c0 dead000000000007 [ 43.902569] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cac3c01 [ 43.904893] page dumped because: kasan: bad access detected [ 43.906172] [ 43.906515] Memory state around the buggy address: [ 43.907684] ffff88800c593a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.909398] ffff88800c593a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 43.911097] >ffff88800c593b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.912714] ^ [ 43.913915] ffff88800c593b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 43.915585] ffff88800c593c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 43.917330] ================================================================== [ 43.923351] Disabling lock debugging due to kernel taint [ 48.079308] BUG: Bad rss-counter state mm:00000000da5d6a65 type:MM_FILEPAGES val:33 [ 48.080052] BUG: Bad rss-counter state mm:00000000da5d6a65 type:MM_ANONPAGES val:22 [ 48.741210] BUG: Bad rss-counter state mm:000000004e992699 type:MM_FILEPAGES val:33 [ 48.741969] BUG: Bad rss-counter state mm:000000004e992699 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25678' (ECDSA) to the list of known hosts. 2023/06/20 10:08:26 fuzzer started 2023/06/20 10:08:26 dialing manager at localhost:44161 2023/06/20 10:08:26 checking machine... 2023/06/20 10:08:26 checking revisions... [ 49.650390] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:08:26 testing simple program... [ 49.713979] cgroup: Unknown subsys name 'net' [ 49.771451] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:08:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffed100390fedf RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88801c87f6e8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ffa 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=00007f16072cb328 CR3=0000000005482000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffff88801a1e2080 RCX=ffffffff81370c98 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000200 RSP=ffff88801c87fba0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88806cf35000 R13=ffff88806cf3a3a8 R14=ffff88806cf3a2c0 R15=0000000000000000 RIP=ffffffff813710c9 RFL=00000006 [-----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 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=00007ffe086ebb98 CR3=0000000017f52000 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=38303a3031203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383631 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000