syzkaller login: [ 30.354923] BUG: Bad rss-counter state mm:00000000de83b251 type:MM_FILEPAGES val:33 [ 30.356346] BUG: Bad rss-counter state mm:00000000de83b251 type:MM_ANONPAGES val:22 [ 30.395579] ================================================================== [ 30.396768] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.397924] Read of size 8 at addr ffff88800e006058 by task sshd/220 [ 30.398855] [ 30.399112] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.400160] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.401353] Call Trace: [ 30.401750] [ 30.402084] dump_stack_lvl+0x91/0xf0 [ 30.402670] print_report+0xcc/0x620 [ 30.403245] ? __virt_addr_valid+0x102/0x340 [ 30.403912] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.404586] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.405170] kasan_report+0xbe/0xf0 [ 30.405627] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.406208] vma_interval_tree_remove+0xc75/0xec0 [ 30.406783] vma_prepare+0xc54/0x11a0 [ 30.407237] __split_vma+0x5af/0x950 [ 30.407686] ? __pfx___split_vma+0x10/0x10 [ 30.408191] ? find_held_lock+0x2c/0x110 [ 30.408684] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.409221] ? lock_is_held_type+0x9f/0x120 [ 30.409758] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.410329] ? mtree_range_walk+0x632/0x900 [ 30.410881] ? mas_walk+0x5c7/0x7c0 [ 30.411383] do_vmi_munmap+0x1f1/0x2b0 [ 30.411903] mmap_region+0x1f9/0x2660 [ 30.412408] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.412945] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.413774] ? __pfx_lock_acquire+0x10/0x10 [ 30.414396] ? __pfx_mmap_region+0x10/0x10 [ 30.415016] ? security_mmap_addr+0x7d/0xa0 [ 30.415636] ? get_unmapped_area+0x1f5/0x3f0 [ 30.416279] do_mmap+0x854/0xf00 [ 30.416793] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.417371] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.418053] ksys_mmap_pgoff+0x3af/0x500 [ 30.418646] do_syscall_64+0x3f/0x90 [ 30.419208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.419967] RIP: 0033:0x7f329885ed82 [ 30.420503] 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 [ 30.423013] RSP: 002b:00007fff0295acb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.424074] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f329885ed82 [ 30.425072] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3297c98000 [ 30.426075] RBP: 00007f3297c98000 R08: 0000000000000009 R09: 0000000000001000 [ 30.427070] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e66956f70 [ 30.428065] R13: 00007fff0295acd0 R14: 00007fff0295ad00 R15: 00007fff0295b060 [ 30.429075] [ 30.429416] [ 30.429689] Allocated by task 213: [ 30.430191] kasan_save_stack+0x22/0x50 [ 30.430783] kasan_set_track+0x25/0x30 [ 30.431362] __kasan_slab_alloc+0x59/0x70 [ 30.431976] kmem_cache_alloc+0x16b/0x370 [ 30.432579] vm_area_dup+0x20/0x160 [ 30.433111] __split_vma+0x170/0x950 [ 30.433675] split_vma+0xc6/0x110 [ 30.434189] mprotect_fixup+0x8d2/0xb30 [ 30.434783] do_mprotect_pkey+0x87e/0xd40 [ 30.435391] __x64_sys_mprotect+0x78/0xc0 [ 30.436001] do_syscall_64+0x3f/0x90 [ 30.436557] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.437312] [ 30.437583] Freed by task 213: [ 30.438041] kasan_save_stack+0x22/0x50 [ 30.438631] kasan_set_track+0x25/0x30 [ 30.439213] kasan_save_free_info+0x2b/0x50 [ 30.439839] __kasan_slab_free+0x10a/0x190 [ 30.440462] kmem_cache_free+0x10d/0x4d0 [ 30.441058] rcu_core+0x8c8/0x2860 [ 30.441585] __do_softirq+0x1b7/0x7d4 [ 30.442149] [ 30.442399] Last potentially related work creation: [ 30.443087] kasan_save_stack+0x22/0x50 [ 30.443676] __kasan_record_aux_stack+0x8e/0xa0 [ 30.444351] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.445107] remove_vma+0x139/0x170 [ 30.445655] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.446310] do_vmi_munmap+0x1f1/0x2b0 [ 30.446879] __vm_munmap+0x138/0x3a0 [ 30.447427] __x64_sys_munmap+0x59/0x80 [ 30.448013] do_syscall_64+0x3f/0x90 [ 30.448568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.449327] [ 30.449587] Second to last potentially related work creation: [ 30.450387] kasan_save_stack+0x22/0x50 [ 30.450977] __kasan_record_aux_stack+0x8e/0xa0 [ 30.451649] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.452399] remove_vma+0x139/0x170 [ 30.452930] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.453604] do_vmi_munmap+0x1f1/0x2b0 [ 30.454175] mmap_region+0x1f9/0x2660 [ 30.454732] do_mmap+0x854/0xf00 [ 30.455240] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.455815] ksys_mmap_pgoff+0x7d/0x500 [ 30.456393] do_syscall_64+0x3f/0x90 [ 30.456949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.457714] [ 30.457964] The buggy address belongs to the object at ffff88800e006000 [ 30.457964] which belongs to the cache vm_area_struct of size 168 [ 30.459685] The buggy address is located 88 bytes inside of [ 30.459685] freed 168-byte region [ffff88800e006000, ffff88800e0060a8) [ 30.461340] [ 30.461600] The buggy address belongs to the physical page: [ 30.462374] page:000000009443a419 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe006 [ 30.463639] memcg:ffff8880093d8401 [ 30.464139] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.464956] page_type: 0xffffffff() [ 30.465482] raw: 0100000000000200 ffff8880087a0c80 ffffea00003983c0 dead000000000005 [ 30.466589] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880093d8401 [ 30.467653] page dumped because: kasan: bad access detected [ 30.468428] [ 30.468679] Memory state around the buggy address: [ 30.469358] ffff88800e005f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.470377] ffff88800e005f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.471380] >ffff88800e006000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.472377] ^ [ 30.473230] ffff88800e006080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 30.474240] ffff88800e006100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.475237] ================================================================== [ 30.476635] Disabling lock debugging due to kernel taint [ 32.355028] BUG: Bad rss-counter state mm:00000000b3f7c614 type:MM_FILEPAGES val:33 [ 32.356224] BUG: Bad rss-counter state mm:00000000b3f7c614 type:MM_ANONPAGES val:22 [ 32.815568] BUG: Bad rss-counter state mm:000000001a5e7069 type:MM_FILEPAGES val:33 [ 32.816752] BUG: Bad rss-counter state mm:000000001a5e7069 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47573' (ECDSA) to the list of known hosts. 2023/06/21 06:41:15 fuzzer started 2023/06/21 06:41:15 dialing manager at localhost:36067 2023/06/21 06:41:15 checking machine... 2023/06/21 06:41:15 checking revisions... [ 33.565582] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:41:15 testing simple program... [ 33.609310] cgroup: Unknown subsys name 'net' [ 33.645574] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:41:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffea000071f780 RCX=0000000000000000 RDX=ffff888008d69b40 RSI=ffffffff81bad696 RDI=0000000000000001 RBP=0000000000000000 RSP=ffff888008d7faf0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000128 R12=0000000000000040 R13=ffff88801c045488 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff814c0880 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=00007f91bd751e40 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=ffffffff000000000000000000000000 XMM02=ffffffff000000000000000000000000 XMM03=00000000000000000000000000777074 XMM04=00007f6881d12c71000000725f646975 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000726f7475636578652d7a7973 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81132ffe RBX=0000000000000001 RCX=ffff88801460f070 RDX=ffff88801460f018 RSI=1ffff110028c1dfc RDI=ffff88801460efd0 RBP=ffff88801460f028 RSP=ffff88801460ef10 R8 =0000000000000000 R9 =0000000000000000 R10=ffff88801460efd0 R11=00000000000b6a61 R12=ffffed10028c1dfc R13=ffff88801460f018 R14=ffff88801460f018 R15=ffff88801460efd0 RIP=ffffffff81130641 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 00007fe0b0852900 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=00007fe0b080b008 CR3=0000000019cba000 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=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