syzkaller login: [ 35.312463] BUG: Bad rss-counter state mm:000000000f26ee20 type:MM_FILEPAGES val:33 [ 35.313151] BUG: Bad rss-counter state mm:000000000f26ee20 type:MM_ANONPAGES val:22 [ 35.359514] ================================================================== [ 35.360157] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.360910] Read of size 8 at addr ffff88800df5cc20 by task sshd/221 [ 35.361394] [ 35.361536] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.362089] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.362702] Call Trace: [ 35.362909] <TASK> [ 35.363094] dump_stack_lvl+0x91/0xf0 [ 35.363411] print_report+0xcc/0x620 [ 35.363725] ? __virt_addr_valid+0x102/0x340 [ 35.364078] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.364537] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.364937] kasan_report+0xbe/0xf0 [ 35.365247] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.365641] vma_interval_tree_remove+0xc75/0xec0 [ 35.366025] vma_prepare+0xc54/0x11a0 [ 35.366337] __split_vma+0x5af/0x950 [ 35.366641] ? __pfx___split_vma+0x10/0x10 [ 35.366977] ? find_held_lock+0x2c/0x110 [ 35.367312] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.367674] ? lock_is_held_type+0x9f/0x120 [ 35.368023] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.368450] ? mtree_range_walk+0x632/0x900 [ 35.368804] ? mas_walk+0x5c7/0x7c0 [ 35.369190] do_vmi_munmap+0x1f1/0x2b0 [ 35.369495] mmap_region+0x1f9/0x2660 [ 35.369805] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.370139] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.370598] ? __pfx_lock_acquire+0x10/0x10 [ 35.370998] ? __pfx_mmap_region+0x10/0x10 [ 35.371337] ? security_mmap_addr+0x7d/0xa0 [ 35.371677] ? get_unmapped_area+0x1f5/0x3f0 [ 35.372035] do_mmap+0x854/0xf00 [ 35.372332] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.372670] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.373035] ksys_mmap_pgoff+0x3af/0x500 [ 35.373364] do_syscall_64+0x3f/0x90 [ 35.373678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.374100] RIP: 0033:0x7f089f9ead82 [ 35.374398] 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 [ 35.375734] RSP: 002b:00007fff2f4d0a48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.376309] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f089f9ead82 [ 35.376912] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f089ee24000 [ 35.377451] RBP: 00007f089ee24000 R08: 0000000000000009 R09: 0000000000001000 [ 35.377988] R10: 0000000000000812 R11: 0000000000000206 R12: 00005626cd8b6f70 [ 35.378521] R13: 00007fff2f4d0a60 R14: 00007fff2f4d0a90 R15: 00007fff2f4d0df0 [ 35.379060] </TASK> [ 35.379250] [ 35.379388] Allocated by task 214: [ 35.379663] kasan_save_stack+0x22/0x50 [ 35.379994] kasan_set_track+0x25/0x30 [ 35.380314] __kasan_slab_alloc+0x59/0x70 [ 35.396425] kmem_cache_alloc+0x16b/0x370 [ 35.396789] vm_area_dup+0x20/0x160 [ 35.397087] __split_vma+0x170/0x950 [ 35.397386] split_vma+0xc6/0x110 [ 35.397670] mprotect_fixup+0x8d2/0xb30 [ 35.397994] do_mprotect_pkey+0x87e/0xd40 [ 35.398333] __x64_sys_mprotect+0x78/0xc0 [ 35.398670] do_syscall_64+0x3f/0x90 [ 35.398979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.399396] [ 35.399539] Freed by task 13: [ 35.399784] kasan_save_stack+0x22/0x50 [ 35.400112] kasan_set_track+0x25/0x30 [ 35.408565] kasan_save_free_info+0x2b/0x50 [ 35.408913] __kasan_slab_free+0x10a/0x190 [ 35.409255] kmem_cache_free+0x10d/0x4d0 [ 35.409583] rcu_core+0x8c8/0x2860 [ 35.409874] __do_softirq+0x1b7/0x7d4 [ 35.410187] [ 35.410329] Last potentially related work creation: [ 35.410700] kasan_save_stack+0x22/0x50 [ 35.411024] __kasan_record_aux_stack+0x8e/0xa0 [ 35.411392] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.411800] remove_vma+0x139/0x170 [ 35.412088] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.412491] do_vmi_munmap+0x1f1/0x2b0 [ 35.412809] __vm_munmap+0x138/0x3a0 [ 35.413116] __x64_sys_munmap+0x59/0x80 [ 35.413436] do_syscall_64+0x3f/0x90 [ 35.413746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.414160] [ 35.414302] Second to last potentially related work creation: [ 35.414735] kasan_save_stack+0x22/0x50 [ 35.415058] __kasan_record_aux_stack+0x8e/0xa0 [ 35.415424] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.415840] remove_vma+0x139/0x170 [ 35.416134] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.416527] do_vmi_munmap+0x1f1/0x2b0 [ 35.416843] __vm_munmap+0x138/0x3a0 [ 35.417199] elf_map+0x26f/0x310 [ 35.417490] load_elf_binary+0x3417/0x5030 [ 35.417834] bprm_execve+0x803/0x1940 [ 35.418137] do_execveat_common+0x734/0x8e0 [ 35.418475] __x64_sys_execve+0x93/0xc0 [ 35.418790] do_syscall_64+0x3f/0x90 [ 35.419102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.419511] [ 35.419652] The buggy address belongs to the object at ffff88800df5cbc8 [ 35.419652] which belongs to the cache vm_area_struct of size 168 [ 35.420595] The buggy address is located 88 bytes inside of [ 35.420595] freed 168-byte region [ffff88800df5cbc8, ffff88800df5cc70) [ 35.432466] [ 35.432622] The buggy address belongs to the physical page: [ 35.433044] page:00000000c1dfd4d9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf5c [ 35.433737] memcg:ffff88800df6e301 [ 35.434012] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.434462] page_type: 0xffffffff() [ 35.434757] raw: 0100000000000200 ffff8880087a0c80 ffffea0000393080 dead000000000009 [ 35.435345] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df6e301 [ 35.435919] page dumped because: kasan: bad access detected [ 35.436358] [ 35.436513] Memory state around the buggy address: [ 35.436882] ffff88800df5cb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.437424] ffff88800df5cb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 35.437967] >ffff88800df5cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 35.438503] ^ [ 35.438839] ffff88800df5cc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 35.439380] ffff88800df5cd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 35.439924] ================================================================== [ 35.444559] Disabling lock debugging due to kernel taint [ 41.443580] BUG: Bad rss-counter state mm:0000000088ccb18a type:MM_FILEPAGES val:33 [ 41.444252] BUG: Bad rss-counter state mm:0000000088ccb18a type:MM_ANONPAGES val:22 [ 42.174105] BUG: Bad rss-counter state mm:00000000c46012a8 type:MM_FILEPAGES val:33 [ 42.174826] BUG: Bad rss-counter state mm:00000000c46012a8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49741' (ECDSA) to the list of known hosts. 2023/06/21 08:20:13 fuzzer started 2023/06/21 08:20:13 dialing manager at localhost:36067 2023/06/21 08:20:13 checking machine... 2023/06/21 08:20:13 checking revisions... [ 43.463766] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:20:14 testing simple program... [ 43.541863] cgroup: Unknown subsys name 'net' [ 43.609834] cgroup: Unknown subsys name 'rlimit' executing program executing program VM DIAGNOSIS: 08:20:13 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f205ea6f328 CR3=0000000005482000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 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=00007fee88677110 CR3=000000000f886000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=e6eb3511bd043a520000000000134b98 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=1eca5ce4b10da55b00000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000