syzkaller login: [ 32.037094] BUG: Bad rss-counter state mm:00000000cfdeab04 type:MM_FILEPAGES val:33 [ 32.038098] BUG: Bad rss-counter state mm:00000000cfdeab04 type:MM_ANONPAGES val:22 [ 32.151562] ================================================================== [ 32.152291] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.152904] Read of size 8 at addr ffff888018ffa5c8 by task sshd/221 [ 32.153421] [ 32.153569] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.154166] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.154853] Call Trace: [ 32.155077] [ 32.155277] dump_stack_lvl+0x91/0xf0 [ 32.155670] print_report+0xcc/0x620 [ 32.155992] ? __virt_addr_valid+0x102/0x340 [ 32.156563] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.156979] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.157408] kasan_report+0xbe/0xf0 [ 32.157734] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.158152] vma_interval_tree_remove+0xc75/0xec0 [ 32.158529] vma_prepare+0xc54/0x11a0 [ 32.158829] __split_vma+0x5af/0x950 [ 32.159130] ? __pfx___split_vma+0x10/0x10 [ 32.159489] ? find_held_lock+0x2c/0x110 [ 32.159828] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.160194] ? lock_is_held_type+0x9f/0x120 [ 32.160542] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.160928] ? mtree_range_walk+0x632/0x900 [ 32.161278] ? mas_walk+0x5c7/0x7c0 [ 32.161571] do_vmi_munmap+0x1f1/0x2b0 [ 32.161881] mmap_region+0x1f9/0x2660 [ 32.162190] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.162511] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.162970] ? __pfx_lock_acquire+0x10/0x10 [ 32.163346] ? __pfx_mmap_region+0x10/0x10 [ 32.163675] ? security_mmap_addr+0x7d/0xa0 [ 32.164004] ? get_unmapped_area+0x1f5/0x3f0 [ 32.164389] do_mmap+0x854/0xf00 [ 32.164688] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.165018] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.165406] ksys_mmap_pgoff+0x3af/0x500 [ 32.165778] do_syscall_64+0x3f/0x90 [ 32.166154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.166640] RIP: 0033:0x7f10ad8e1d82 [ 32.167007] 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 [ 32.168611] RSP: 002b:00007ffdccbb0908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.169232] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f10ad8e1d82 [ 32.169800] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f10acd1b000 [ 32.170389] RBP: 00007f10acd1b000 R08: 0000000000000009 R09: 0000000000001000 [ 32.171016] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557a9fdcfb20 [ 32.171701] R13: 00007ffdccbb0920 R14: 00007ffdccbb0950 R15: 00007ffdccbb0cb0 [ 32.172335] [ 32.172558] [ 32.172709] Allocated by task 214: [ 32.173021] kasan_save_stack+0x22/0x50 [ 32.173387] kasan_set_track+0x25/0x30 [ 32.173701] __kasan_slab_alloc+0x59/0x70 [ 32.174042] kmem_cache_alloc+0x16b/0x370 [ 32.174381] vm_area_dup+0x20/0x160 [ 32.174690] __split_vma+0x170/0x950 [ 32.175013] split_vma+0xc6/0x110 [ 32.175350] mprotect_fixup+0x8d2/0xb30 [ 32.175719] do_mprotect_pkey+0x87e/0xd40 [ 32.176128] __x64_sys_mprotect+0x78/0xc0 [ 32.176567] do_syscall_64+0x3f/0x90 [ 32.176950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.177460] [ 32.177622] Freed by task 214: [ 32.177914] kasan_save_stack+0x22/0x50 [ 32.178267] kasan_set_track+0x25/0x30 [ 32.178581] kasan_save_free_info+0x2b/0x50 [ 32.178936] __kasan_slab_free+0x10a/0x190 [ 32.179296] kmem_cache_free+0x10d/0x4d0 [ 32.179709] rcu_core+0x8c8/0x2860 [ 32.180026] __do_softirq+0x1b7/0x7d4 [ 32.180416] [ 32.180590] Last potentially related work creation: [ 32.181037] kasan_save_stack+0x22/0x50 [ 32.181413] __kasan_record_aux_stack+0x8e/0xa0 [ 32.181849] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.182367] remove_vma+0x139/0x170 [ 32.182679] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.183070] do_vmi_munmap+0x1f1/0x2b0 [ 32.183449] __vm_munmap+0x138/0x3a0 [ 32.183774] __x64_sys_munmap+0x59/0x80 [ 32.184106] do_syscall_64+0x3f/0x90 [ 32.184426] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.184835] [ 32.184971] The buggy address belongs to the object at ffff888018ffa570 [ 32.184971] which belongs to the cache vm_area_struct of size 168 [ 32.185862] The buggy address is located 88 bytes inside of [ 32.185862] freed 168-byte region [ffff888018ffa570, ffff888018ffa618) [ 32.186759] [ 32.186919] The buggy address belongs to the physical page: [ 32.187417] page:00000000124a4051 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ffa [ 32.188208] memcg:ffff88800d763001 [ 32.188483] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.188885] page_type: 0xffffffff() [ 32.189224] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.189873] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d763001 [ 32.190511] page dumped because: kasan: bad access detected [ 32.190976] [ 32.191155] Memory state around the buggy address: [ 32.191660] ffff888018ffa480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.192317] ffff888018ffa500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 32.192884] >ffff888018ffa580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.193498] ^ [ 32.193963] ffff888018ffa600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.194571] ffff888018ffa680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.195149] ================================================================== [ 32.195900] Disabling lock debugging due to kernel taint [ 33.781001] BUG: Bad rss-counter state mm:000000000e332886 type:MM_FILEPAGES val:33 [ 33.781729] BUG: Bad rss-counter state mm:000000000e332886 type:MM_ANONPAGES val:22 [ 34.157060] BUG: Bad rss-counter state mm:00000000688b5f5b type:MM_FILEPAGES val:33 [ 34.157730] BUG: Bad rss-counter state mm:00000000688b5f5b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44581' (ECDSA) to the list of known hosts. 2023/06/20 09:27:55 fuzzer started 2023/06/20 09:27:55 dialing manager at localhost:44161 2023/06/20 09:27:55 checking machine... 2023/06/20 09:27:55 checking revisions... [ 34.749015] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:27:56 testing simple program... [ 34.785230] cgroup: Unknown subsys name 'net' [ 34.846210] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:27:54 Registers: info registers vcpu 0 RAX=00000016c2ae7fa8 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806ce28140 RDI=000000000005205a RBP=ffff88806ce28140 RSP=ffff88806ce09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000eaca0 R11=00000016c26627f0 R12=000000000005205a R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff811062a5 RFL=00000013 [----A-C] 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=00007f73e0da3018 CR3=000000000d814000 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=2035353a37323a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a37323a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff844c1de9 RDX=1ffff110033d6f98 RSI=0000000000000001 RDI=0000000000000002 RBP=1ffff110033d6f62 RSP=ffff888019eb7b08 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000001 R13=0000000000000cc0 R14=ffff888019eb7cc0 R15=dffffc0000000000 RIP=ffffffff814c03b8 RFL=00000202 [-------] 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 00007fd833632900 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=00007fd8335dc008 CR3=000000000fe90000 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