syzkaller login: [ 31.057571] BUG: Bad rss-counter state mm:00000000b6158888 type:MM_FILEPAGES val:33 [ 31.059401] BUG: Bad rss-counter state mm:00000000b6158888 type:MM_ANONPAGES val:22 [ 31.219117] ================================================================== [ 31.220061] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.221003] Read of size 8 at addr ffff88800ec86ed8 by task sshd/221 [ 31.221772] [ 31.221988] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.223012] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.223995] Call Trace: [ 31.224315] [ 31.224603] dump_stack_lvl+0x91/0xf0 [ 31.225105] print_report+0xcc/0x620 [ 31.225588] ? __virt_addr_valid+0x102/0x340 [ 31.226144] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.226766] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.227385] kasan_report+0xbe/0xf0 [ 31.227872] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.228484] vma_interval_tree_remove+0xc75/0xec0 [ 31.229101] vma_prepare+0xc54/0x11a0 [ 31.229578] __split_vma+0x5af/0x950 [ 31.230048] ? __pfx___split_vma+0x10/0x10 [ 31.230591] ? find_held_lock+0x2c/0x110 [ 31.231113] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.231677] ? lock_is_held_type+0x9f/0x120 [ 31.232227] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.232840] ? mtree_range_walk+0x632/0x900 [ 31.233391] ? mas_walk+0x5c7/0x7c0 [ 31.233867] do_vmi_munmap+0x1f1/0x2b0 [ 31.234378] mmap_region+0x1f9/0x2660 [ 31.234862] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.235368] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.236097] ? __pfx_lock_acquire+0x10/0x10 [ 31.236631] ? __pfx_mmap_region+0x10/0x10 [ 31.237161] ? security_mmap_addr+0x7d/0xa0 [ 31.237698] ? get_unmapped_area+0x1f5/0x3f0 [ 31.238247] do_mmap+0x854/0xf00 [ 31.238690] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.239178] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.239745] ksys_mmap_pgoff+0x3af/0x500 [ 31.240255] do_syscall_64+0x3f/0x90 [ 31.240744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.241401] RIP: 0033:0x7f5a9a2f6d82 [ 31.241859] 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 [ 31.244053] RSP: 002b:00007ffeda7922c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.244950] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a9a2f6d82 [ 31.245797] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a99730000 [ 31.246641] RBP: 00007f5a99730000 R08: 0000000000000009 R09: 0000000000001000 [ 31.247484] R10: 0000000000000812 R11: 0000000000000206 R12: 00005614bd82e980 [ 31.248340] R13: 00007ffeda7922e0 R14: 00007ffeda792310 R15: 00007ffeda792670 [ 31.249200] [ 31.249508] [ 31.249725] Allocated by task 214: [ 31.250150] kasan_save_stack+0x22/0x50 [ 31.250649] kasan_set_track+0x25/0x30 [ 31.251165] __kasan_slab_alloc+0x59/0x70 [ 31.251689] kmem_cache_alloc+0x16b/0x370 [ 31.252233] vm_area_dup+0x20/0x160 [ 31.252685] __split_vma+0x170/0x950 [ 31.253159] split_vma+0xc6/0x110 [ 31.253597] mprotect_fixup+0x8d2/0xb30 [ 31.254094] do_mprotect_pkey+0x87e/0xd40 [ 31.254614] __x64_sys_mprotect+0x78/0xc0 [ 31.255144] do_syscall_64+0x3f/0x90 [ 31.255621] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.256278] [ 31.256506] Freed by task 214: [ 31.256896] kasan_save_stack+0x22/0x50 [ 31.257409] kasan_set_track+0x25/0x30 [ 31.257902] kasan_save_free_info+0x2b/0x50 [ 31.258431] __kasan_slab_free+0x10a/0x190 [ 31.258963] kmem_cache_free+0x10d/0x4d0 [ 31.259464] rcu_core+0x8c8/0x2860 [ 31.259911] __do_softirq+0x1b7/0x7d4 [ 31.260392] [ 31.260614] Last potentially related work creation: [ 31.261202] kasan_save_stack+0x22/0x50 [ 31.261705] __kasan_record_aux_stack+0x8e/0xa0 [ 31.262278] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.262918] remove_vma+0x139/0x170 [ 31.263364] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.264015] do_vmi_munmap+0x1f1/0x2b0 [ 31.264530] __vm_munmap+0x138/0x3a0 [ 31.265017] __x64_sys_munmap+0x59/0x80 [ 31.265509] do_syscall_64+0x3f/0x90 [ 31.265998] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.266634] [ 31.266851] Second to last potentially related work creation: [ 31.267524] kasan_save_stack+0x22/0x50 [ 31.268032] __kasan_record_aux_stack+0x8e/0xa0 [ 31.268608] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.269246] remove_vma+0x139/0x170 [ 31.269703] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.270268] do_vmi_munmap+0x1f1/0x2b0 [ 31.270762] mmap_region+0x1f9/0x2660 [ 31.271241] do_mmap+0x854/0xf00 [ 31.271680] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.272190] ksys_mmap_pgoff+0x3af/0x500 [ 31.272695] do_syscall_64+0x3f/0x90 [ 31.273194] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.273878] [ 31.274106] The buggy address belongs to the object at ffff88800ec86e80 [ 31.274106] which belongs to the cache vm_area_struct of size 168 [ 31.275658] The buggy address is located 88 bytes inside of [ 31.275658] freed 168-byte region [ffff88800ec86e80, ffff88800ec86f28) [ 31.277134] [ 31.277357] The buggy address belongs to the physical page: [ 31.278068] page:00000000ad00d3e9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec86 [ 31.279222] memcg:ffff88800eb8c101 [ 31.279672] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.280421] page_type: 0xffffffff() [ 31.280892] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ad780 dead000000000007 [ 31.281876] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb8c101 [ 31.282832] page dumped because: kasan: bad access detected [ 31.283546] [ 31.283777] Memory state around the buggy address: [ 31.284419] ffff88800ec86d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.285336] ffff88800ec86e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.286231] >ffff88800ec86e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.287122] ^ [ 31.287892] ffff88800ec86f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.288791] ffff88800ec86f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.289688] ================================================================== [ 31.290731] Disabling lock debugging due to kernel taint [ 33.485131] BUG: Bad rss-counter state mm:00000000de3d3360 type:MM_FILEPAGES val:33 [ 33.486468] BUG: Bad rss-counter state mm:00000000de3d3360 type:MM_ANONPAGES val:22 [ 33.992462] BUG: Bad rss-counter state mm:0000000055d8cf95 type:MM_FILEPAGES val:33 [ 33.993486] BUG: Bad rss-counter state mm:0000000055d8cf95 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45762' (ECDSA) to the list of known hosts. 2023/06/20 16:15:13 fuzzer started 2023/06/20 16:15:13 dialing manager at localhost:36067 2023/06/20 16:15:13 checking machine... 2023/06/20 16:15:13 checking revisions... [ 34.745419] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:15:13 testing simple program... [ 34.805777] cgroup: Unknown subsys name 'net' [ 34.854660] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:15:13 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=ffff88801422f918 RCX=0000000000000000 RDX=1ffff11000d3e025 RSI=ffffffff81f39aa8 RDI=ffff8880069f0128 RBP=ffff8880069f00d8 RSP=ffff88801422f7e0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=322e322e302e3031 R12=ffff888012bfff00 R13=ffff88801422f928 R14=ffff8880069f00ec R15=ffff88800ff69808 RIP=ffffffff84511dca 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 00007f00901b7700 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=00007fd27d640ac0 CR3=000000000e1cc000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343334 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=ffffffff8180c6a2 RCX=ffffffff860d8201 RDX=1ffff1100d9e135e RSI=0000000000000000 RDI=ffffffff8180c6a2 RBP=ffffffff8180c6a2 RSP=ffff88806cf09a48 R8 =ffffffff860d825a R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000010b8d R12=0000000000000001 R13=0000000000000000 R14=ffff88801690b680 R15=ffff88801bde4670 RIP=ffffffff811fc772 RFL=00000283 [--S---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fce500d8900 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=00007fce50c7b0f0 CR3=000000000dd28000 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