syzkaller login: [ 30.177184] BUG: Bad rss-counter state mm:000000000fb9b696 type:MM_FILEPAGES val:33 [ 30.179229] BUG: Bad rss-counter state mm:000000000fb9b696 type:MM_ANONPAGES val:22 [ 30.328753] ================================================================== [ 30.329596] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.330471] Read of size 8 at addr ffff8880187eb310 by task sshd/220 [ 30.331197] [ 30.331405] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.332263] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.333202] Call Trace: [ 30.333501] [ 30.333777] dump_stack_lvl+0x91/0xf0 [ 30.334241] print_report+0xcc/0x620 [ 30.334698] ? __virt_addr_valid+0x102/0x340 [ 30.335229] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.335810] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.336392] kasan_report+0xbe/0xf0 [ 30.336843] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.337428] vma_interval_tree_remove+0xc75/0xec0 [ 30.337992] vma_prepare+0xc54/0x11a0 [ 30.338444] __split_vma+0x5af/0x950 [ 30.338912] ? __pfx___split_vma+0x10/0x10 [ 30.339438] ? find_held_lock+0x2c/0x110 [ 30.339950] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.340517] ? lock_is_held_type+0x9f/0x120 [ 30.341049] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.341636] ? mtree_range_walk+0x632/0x900 [ 30.342180] ? mas_walk+0x5c7/0x7c0 [ 30.342648] do_vmi_munmap+0x1f1/0x2b0 [ 30.343151] mmap_region+0x1f9/0x2660 [ 30.343622] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.344120] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.344821] ? __pfx_lock_acquire+0x10/0x10 [ 30.345346] ? __pfx_mmap_region+0x10/0x10 [ 30.345869] ? security_mmap_addr+0x7d/0xa0 [ 30.346383] ? get_unmapped_area+0x1f5/0x3f0 [ 30.346925] do_mmap+0x854/0xf00 [ 30.347356] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.347847] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.348390] ksys_mmap_pgoff+0x3af/0x500 [ 30.348892] do_syscall_64+0x3f/0x90 [ 30.349366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.350014] RIP: 0033:0x7fea2af9cd82 [ 30.350473] 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 [ 30.352612] RSP: 002b:00007ffcd5a88908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.353506] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fea2af9cd82 [ 30.354349] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fea2a3d6000 [ 30.355193] RBP: 00007fea2a3d6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.356036] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b39d4bcb20 [ 30.356879] R13: 00007ffcd5a88920 R14: 00007ffcd5a88950 R15: 00007ffcd5a88cb0 [ 30.357739] [ 30.358033] [ 30.358248] Allocated by task 213: [ 30.358677] kasan_save_stack+0x22/0x50 [ 30.359181] kasan_set_track+0x25/0x30 [ 30.359664] __kasan_slab_alloc+0x59/0x70 [ 30.360191] kmem_cache_alloc+0x16b/0x370 [ 30.360703] vm_area_dup+0x20/0x160 [ 30.361154] __split_vma+0x170/0x950 [ 30.361611] split_vma+0xc6/0x110 [ 30.362044] mprotect_fixup+0x8d2/0xb30 [ 30.362538] do_mprotect_pkey+0x87e/0xd40 [ 30.363066] __x64_sys_mprotect+0x78/0xc0 [ 30.363593] do_syscall_64+0x3f/0x90 [ 30.364185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.364826] [ 30.365038] Freed by task 213: [ 30.365425] kasan_save_stack+0x22/0x50 [ 30.365923] kasan_set_track+0x25/0x30 [ 30.366416] kasan_save_free_info+0x2b/0x50 [ 30.366945] __kasan_slab_free+0x10a/0x190 [ 30.367466] kmem_cache_free+0x10d/0x4d0 [ 30.367975] rcu_core+0x8c8/0x2860 [ 30.368408] __do_softirq+0x1b7/0x7d4 [ 30.368884] [ 30.369102] Last potentially related work creation: [ 30.369684] kasan_save_stack+0x22/0x50 [ 30.370180] __kasan_record_aux_stack+0x8e/0xa0 [ 30.370752] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.371385] remove_vma+0x139/0x170 [ 30.371838] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.372389] do_vmi_munmap+0x1f1/0x2b0 [ 30.372864] __vm_munmap+0x138/0x3a0 [ 30.373320] __x64_sys_munmap+0x59/0x80 [ 30.373799] do_syscall_64+0x3f/0x90 [ 30.374271] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.374910] [ 30.375125] The buggy address belongs to the object at ffff8880187eb2b8 [ 30.375125] which belongs to the cache vm_area_struct of size 168 [ 30.376598] The buggy address is located 88 bytes inside of [ 30.376598] freed 168-byte region [ffff8880187eb2b8, ffff8880187eb360) [ 30.378002] [ 30.378212] The buggy address belongs to the physical page: [ 30.378870] page:000000008b647490 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x187eb [ 30.379953] memcg:ffff88800f6dc701 [ 30.380370] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.381009] page_type: 0xffffffff() [ 30.381451] raw: 0100000000000200 ffff8880087a0c80 ffffea000067da40 dead000000000004 [ 30.382357] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f6dc701 [ 30.383263] page dumped because: kasan: bad access detected [ 30.383910] [ 30.384120] Memory state around the buggy address: [ 30.384694] ffff8880187eb200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.385532] ffff8880187eb280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.386375] >ffff8880187eb300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.387218] ^ [ 30.387673] ffff8880187eb380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.388517] ffff8880187eb400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.389360] ================================================================== [ 30.390322] Disabling lock debugging due to kernel taint [ 32.276504] BUG: Bad rss-counter state mm:000000000f54be8e type:MM_FILEPAGES val:33 [ 32.277547] BUG: Bad rss-counter state mm:000000000f54be8e type:MM_ANONPAGES val:22 [ 32.733469] BUG: Bad rss-counter state mm:00000000a6673957 type:MM_FILEPAGES val:33 [ 32.734465] BUG: Bad rss-counter state mm:00000000a6673957 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19433' (ECDSA) to the list of known hosts. 2023/06/20 16:25:10 fuzzer started 2023/06/20 16:25:10 dialing manager at localhost:36067 2023/06/20 16:25:10 checking machine... 2023/06/20 16:25:10 checking revisions... [ 33.431541] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:25:11 testing simple program... [ 33.480207] cgroup: Unknown subsys name 'net' [ 33.522786] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:25:10 Registers: info registers vcpu 0 RAX=ffffffff81289068 RBX=0000000000000001 RCX=0000000000000001 RDX=ffffffff85407e01 RSI=ffffffff85407ec8 RDI=ffffffff85407ec8 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860b9c96 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000ba8f R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407ed0 R15=ffff88806ce09a98 RIP=ffffffff81131041 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 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=00007ff8bac90dd0 CR3=000000000d866000 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=2030313a35323a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a35323a3631203032 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=ffffffff864bce2c RDX=1ffff1100d9e135c RSI=0000000000000000 RDI=ffff88806cf09ae8 RBP=0000000000000000 RSP=ffff88806cf09a28 R8 =ffffffff864bce30 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6d7d R12=ffff88800ca1f588 R13=ffff88806cf09ae0 R14=ffff88800ca1f588 R15=ffff88806cf09a98 RIP=ffffffff81131c60 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 00007f7cf1bea900 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=00007f7cf1b94008 CR3=000000000ecdc000 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