syzkaller login: [ 31.664043] BUG: Bad rss-counter state mm:00000000af280754 type:MM_FILEPAGES val:33 [ 31.665495] BUG: Bad rss-counter state mm:00000000af280754 type:MM_ANONPAGES val:22 [ 31.819821] ================================================================== [ 31.820797] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.821778] Read of size 8 at addr ffff88800c49a3f8 by task sshd/219 [ 31.822690] [ 31.822915] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.823856] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.824903] Call Trace: [ 31.825229] [ 31.825519] dump_stack_lvl+0x91/0xf0 [ 31.826045] print_report+0xcc/0x620 [ 31.826556] ? __virt_addr_valid+0x102/0x340 [ 31.827148] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.827825] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.828465] kasan_report+0xbe/0xf0 [ 31.828975] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.829643] vma_interval_tree_remove+0xc75/0xec0 [ 31.830276] vma_prepare+0xc54/0x11a0 [ 31.830798] __split_vma+0x5af/0x950 [ 31.831315] ? __pfx___split_vma+0x10/0x10 [ 31.831894] ? find_held_lock+0x2c/0x110 [ 31.832436] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.833052] ? lock_is_held_type+0x9f/0x120 [ 31.833624] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.834462] ? mtree_range_walk+0x632/0x900 [ 31.835248] ? mas_walk+0x5c7/0x7c0 [ 31.835912] do_vmi_munmap+0x1f1/0x2b0 [ 31.836574] mmap_region+0x1f9/0x2660 [ 31.837196] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.837876] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.838719] ? __pfx_lock_acquire+0x10/0x10 [ 31.839272] ? __pfx_mmap_region+0x10/0x10 [ 31.839820] ? security_mmap_addr+0x7d/0xa0 [ 31.840347] ? get_unmapped_area+0x1f5/0x3f0 [ 31.840908] do_mmap+0x854/0xf00 [ 31.841350] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.841879] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.842448] ksys_mmap_pgoff+0x3af/0x500 [ 31.842968] do_syscall_64+0x3f/0x90 [ 31.843461] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.844114] RIP: 0033:0x7f9f4fd2fd82 [ 31.844587] 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 [ 31.846745] RSP: 002b:00007ffc27834978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.847683] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9f4fd2fd82 [ 31.848523] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9f4f169000 [ 31.849381] RBP: 00007f9f4f169000 R08: 0000000000000009 R09: 0000000000001000 [ 31.850237] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560228378d90 [ 31.851104] R13: 00007ffc27834990 R14: 00007ffc278349c0 R15: 00007ffc27834d20 [ 31.851974] [ 31.852263] [ 31.852475] Allocated by task 212: [ 31.852911] kasan_save_stack+0x22/0x50 [ 31.853409] kasan_set_track+0x25/0x30 [ 31.853930] __kasan_slab_alloc+0x59/0x70 [ 31.854451] kmem_cache_alloc+0x16b/0x370 [ 31.854976] vm_area_dup+0x20/0x160 [ 31.855444] __split_vma+0x170/0x950 [ 31.855932] split_vma+0xc6/0x110 [ 31.856373] mprotect_fixup+0x8d2/0xb30 [ 31.856884] do_mprotect_pkey+0x87e/0xd40 [ 31.857400] __x64_sys_mprotect+0x78/0xc0 [ 31.857941] do_syscall_64+0x3f/0x90 [ 31.858420] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.859078] [ 31.859294] Freed by task 212: [ 31.859711] kasan_save_stack+0x22/0x50 [ 31.860207] kasan_set_track+0x25/0x30 [ 31.860715] kasan_save_free_info+0x2b/0x50 [ 31.861239] __kasan_slab_free+0x10a/0x190 [ 31.861788] kmem_cache_free+0x10d/0x4d0 [ 31.862295] rcu_core+0x8c8/0x2860 [ 31.862764] __do_softirq+0x1b7/0x7d4 [ 31.863264] [ 31.863476] Last potentially related work creation: [ 31.864076] kasan_save_stack+0x22/0x50 [ 31.864582] __kasan_record_aux_stack+0x8e/0xa0 [ 31.865158] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.865820] remove_vma+0x139/0x170 [ 31.866272] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.866840] do_vmi_munmap+0x1f1/0x2b0 [ 31.867330] __vm_munmap+0x138/0x3a0 [ 31.867810] __x64_sys_munmap+0x59/0x80 [ 31.868302] do_syscall_64+0x3f/0x90 [ 31.868785] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.869422] [ 31.869662] The buggy address belongs to the object at ffff88800c49a3a0 [ 31.869662] which belongs to the cache vm_area_struct of size 168 [ 31.871161] The buggy address is located 88 bytes inside of [ 31.871161] freed 168-byte region [ffff88800c49a3a0, ffff88800c49a448) [ 31.872562] [ 31.872784] The buggy address belongs to the physical page: [ 31.873442] page:00000000d3a9a7fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc49a [ 31.874536] memcg:ffff88801341b401 [ 31.874980] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.875653] page_type: 0xffffffff() [ 31.876102] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.877053] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801341b401 [ 31.877968] page dumped because: kasan: bad access detected [ 31.878647] [ 31.878862] Memory state around the buggy address: [ 31.879461] ffff88800c49a280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.880343] ffff88800c49a300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.881205] >ffff88800c49a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.882073] ^ [ 31.882932] ffff88800c49a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.883817] ffff88800c49a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.884677] ================================================================== [ 31.885889] Disabling lock debugging due to kernel taint [ 34.334620] BUG: Bad rss-counter state mm:000000005f250559 type:MM_FILEPAGES val:33 [ 34.336055] BUG: Bad rss-counter state mm:000000005f250559 type:MM_ANONPAGES val:22 [ 34.912152] BUG: Bad rss-counter state mm:00000000ceb72552 type:MM_FILEPAGES val:33 [ 34.913333] BUG: Bad rss-counter state mm:00000000ceb72552 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21455' (ECDSA) to the list of known hosts. 2023/06/20 02:35:37 fuzzer started 2023/06/20 02:35:37 dialing manager at localhost:44161 2023/06/20 02:35:37 checking machine... 2023/06/20 02:35:37 checking revisions... [ 35.517494] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:35:37 testing simple program... [ 35.648915] cgroup: Unknown subsys name 'net' [ 35.685480] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:35:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e359bc0 RCX=ffffffff812531ec RDX=0000000000000000 RSI=0000000000000001 RDI=ffff88806ce395c0 RBP=ffff888015e99bc0 RSP=ffff88800dc5fac8 R8 =ffff888015e99c40 R9 =ffffed1001c6b368 R10=ffff88800e359b47 R11=0000000000000001 R12=0000000000000000 R13=ffff88806ce395c0 R14=ffff88806ce39500 R15=ffff88800e359b40 RIP=ffffffff812536c7 RFL=00000046 [---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 00007f0cd6cc3700 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=00007f4c38995050 CR3=000000000db32000 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=35333a3230203032206e754a3e38333c XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a38333437332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383334 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888015fd7c08 RCX=0000000000000001 RDX=1ffff1100d9e1355 RSI=ffff888015fd7bd8 RDI=ffff88806cf09aa8 RBP=ffff888015fd0000 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b3eeb R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff888015fd7bd8 R15=ffff88806cf09a98 RIP=ffffffff81131ca6 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 00007f8ed5fb4900 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=00007f8ed5f93020 CR3=000000001bbc0000 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