syzkaller login: [ 23.777752] BUG: Bad rss-counter state mm:00000000321d208c type:MM_FILEPAGES val:33 [ 23.779091] BUG: Bad rss-counter state mm:00000000321d208c type:MM_ANONPAGES val:22 [ 23.889729] ================================================================== [ 23.890562] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.891450] Read of size 8 at addr ffff88800f3c4310 by task sshd/219 [ 23.892172] [ 23.892376] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.893186] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.894174] Call Trace: [ 23.894568] [ 23.894828] dump_stack_lvl+0x91/0xf0 [ 23.895282] print_report+0xcc/0x620 [ 23.895730] ? __virt_addr_valid+0x102/0x340 [ 23.896243] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.896820] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.897389] kasan_report+0xbe/0xf0 [ 23.897852] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.898429] vma_interval_tree_remove+0xc75/0xec0 [ 23.898930] vma_prepare+0xc54/0x11a0 [ 23.899250] __split_vma+0x5af/0x950 [ 23.899571] ? __pfx___split_vma+0x10/0x10 [ 23.899934] ? find_held_lock+0x2c/0x110 [ 23.900283] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.900663] ? lock_is_held_type+0x9f/0x120 [ 23.901027] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.901432] ? mtree_range_walk+0x632/0x900 [ 23.901818] ? mas_walk+0x5c7/0x7c0 [ 23.902138] do_vmi_munmap+0x1f1/0x2b0 [ 23.902462] mmap_region+0x1f9/0x2660 [ 23.902783] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.903128] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.903612] ? __pfx_lock_acquire+0x10/0x10 [ 23.903976] ? __pfx_mmap_region+0x10/0x10 [ 23.904333] ? security_mmap_addr+0x7d/0xa0 [ 23.904684] ? get_unmapped_area+0x1f5/0x3f0 [ 23.905058] do_mmap+0x854/0xf00 [ 23.905350] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.905685] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.906068] ksys_mmap_pgoff+0x3af/0x500 [ 23.906399] do_syscall_64+0x3f/0x90 [ 23.906714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.907150] RIP: 0033:0x7f88613acd82 [ 23.907446] 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 [ 23.908868] RSP: 002b:00007ffde68a1838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.909476] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f88613acd82 [ 23.910055] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f88607e6000 [ 23.910623] RBP: 00007f88607e6000 R08: 0000000000000009 R09: 0000000000001000 [ 23.911191] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557b57f70f70 [ 23.911764] R13: 00007ffde68a1850 R14: 00007ffde68a1880 R15: 00007ffde68a1be0 [ 23.912355] [ 23.912551] [ 23.912691] Allocated by task 212: [ 23.912982] kasan_save_stack+0x22/0x50 [ 23.913317] kasan_set_track+0x25/0x30 [ 23.913643] __kasan_slab_alloc+0x59/0x70 [ 23.914007] kmem_cache_alloc+0x16b/0x370 [ 23.914355] vm_area_dup+0x20/0x160 [ 23.914655] __split_vma+0x170/0x950 [ 23.914961] split_vma+0xc6/0x110 [ 23.915252] mprotect_fixup+0x8d2/0xb30 [ 23.915589] do_mprotect_pkey+0x87e/0xd40 [ 23.915942] __x64_sys_mprotect+0x78/0xc0 [ 23.916293] do_syscall_64+0x3f/0x90 [ 23.916604] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.917031] [ 23.917170] Freed by task 19: [ 23.917424] kasan_save_stack+0x22/0x50 [ 23.917750] kasan_set_track+0x25/0x30 [ 23.918004] kasan_save_free_info+0x2b/0x50 [ 23.918275] __kasan_slab_free+0x10a/0x190 [ 23.918547] kmem_cache_free+0x10d/0x4d0 [ 23.918805] rcu_core+0x8c8/0x2860 [ 23.919033] __do_softirq+0x1b7/0x7d4 [ 23.919278] [ 23.919388] Last potentially related work creation: [ 23.919682] kasan_save_stack+0x22/0x50 [ 23.919937] __kasan_record_aux_stack+0x8e/0xa0 [ 23.920228] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.920554] remove_vma+0x139/0x170 [ 23.920781] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.921063] do_vmi_munmap+0x1f1/0x2b0 [ 23.921308] __vm_munmap+0x138/0x3a0 [ 23.921543] __x64_sys_munmap+0x59/0x80 [ 23.921812] do_syscall_64+0x3f/0x90 [ 23.922056] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.922381] [ 23.922492] Second to last potentially related work creation: [ 23.922844] kasan_save_stack+0x22/0x50 [ 23.923098] __kasan_record_aux_stack+0x8e/0xa0 [ 23.923388] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.923711] remove_vma+0x139/0x170 [ 23.923940] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.924222] do_vmi_munmap+0x1f1/0x2b0 [ 23.924468] mmap_region+0x1f9/0x2660 [ 23.924709] do_mmap+0x854/0xf00 [ 23.924932] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.925179] ksys_mmap_pgoff+0x7d/0x500 [ 23.925427] do_syscall_64+0x3f/0x90 [ 23.925668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.926005] [ 23.926115] The buggy address belongs to the object at ffff88800f3c42b8 [ 23.926115] which belongs to the cache vm_area_struct of size 168 [ 23.926844] The buggy address is located 88 bytes inside of [ 23.926844] freed 168-byte region [ffff88800f3c42b8, ffff88800f3c4360) [ 23.927540] [ 23.927650] The buggy address belongs to the physical page: [ 23.927983] page:0000000083e5ab90 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf3c4 [ 23.928526] memcg:ffff88800c71f501 [ 23.928743] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.929072] page_type: 0xffffffff() [ 23.929301] raw: 0100000000000200 ffff8880087a0c80 ffffea000039a700 dead000000000008 [ 23.929769] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c71f501 [ 23.930226] page dumped because: kasan: bad access detected [ 23.930559] [ 23.930671] Memory state around the buggy address: [ 23.930962] ffff88800f3c4200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 23.931395] ffff88800f3c4280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 23.931824] >ffff88800f3c4300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 23.932249] ^ [ 23.932483] ffff88800f3c4380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.932913] ffff88800f3c4400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 23.933345] ================================================================== [ 23.933817] Disabling lock debugging due to kernel taint [ 25.793303] BUG: Bad rss-counter state mm:00000000885aa8d4 type:MM_FILEPAGES val:33 [ 25.794705] BUG: Bad rss-counter state mm:00000000885aa8d4 type:MM_ANONPAGES val:22 [ 26.378807] BUG: Bad rss-counter state mm:000000002b8fa60c type:MM_FILEPAGES val:33 [ 26.380170] BUG: Bad rss-counter state mm:000000002b8fa60c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57796' (ECDSA) to the list of known hosts. 2023/06/21 10:13:39 fuzzer started 2023/06/21 10:13:39 dialing manager at localhost:36067 2023/06/21 10:13:39 checking machine... 2023/06/21 10:13:39 checking revisions... [ 27.104946] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:13:39 testing simple program... [ 27.165070] cgroup: Unknown subsys name 'net' [ 27.215177] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:13:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff1100d9c1329 RCX=ffffffff85d3e490 RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88806ce09938 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8f3d 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=00007fef0eec5020 CR3=000000000e016000 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=2038333a33313a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a33313a3031203132 XMM08=2022656369767265732e407974746567 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff83636c06 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100285eede RSI=ffffffff83636c06 RDI=ffff8880142f7760 RBP=ffff8880142f7730 RSP=ffff8880142f7690 R8 =0000000000000001 R9 =ffff8880142f76d8 R10=0000000000038001 R11=0000000000091bda R12=ffff8880142f7760 R13=0000000000000000 R14=ffff8880159151c0 R15=0000000000092cc0 RIP=ffffffff813ad474 RFL=00000286 [--S--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 00007f59def4d900 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=00007ffe913d2000 CR3=0000000018e00000 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=6720646572637465733a4d41503d706f 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