syzkaller login: [ 54.187704] BUG: Bad rss-counter state mm:0000000089c5ce08 type:MM_FILEPAGES val:33 [ 54.189111] BUG: Bad rss-counter state mm:0000000089c5ce08 type:MM_ANONPAGES val:22 [ 54.355478] ================================================================== [ 54.356559] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 54.357726] Read of size 8 at addr ffff8880101685c8 by task sshd/227 [ 54.358550] [ 54.358769] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 54.359644] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 54.360615] Call Trace: [ 54.360935] [ 54.361220] dump_stack_lvl+0x91/0xf0 [ 54.361708] print_report+0xcc/0x620 [ 54.362191] ? __virt_addr_valid+0x102/0x340 [ 54.362743] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.363382] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.363999] kasan_report+0xbe/0xf0 [ 54.364480] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.365097] vma_interval_tree_remove+0xc75/0xec0 [ 54.365708] vma_prepare+0xc54/0x11a0 [ 54.366188] __split_vma+0x5af/0x950 [ 54.366658] ? __pfx___split_vma+0x10/0x10 [ 54.367206] ? find_held_lock+0x2c/0x110 [ 54.367725] do_vmi_align_munmap+0x2ba/0x11f0 [ 54.368299] ? lock_is_held_type+0x9f/0x120 [ 54.368836] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 54.369435] ? mtree_range_walk+0x632/0x900 [ 54.369987] ? mas_walk+0x5c7/0x7c0 [ 54.370459] do_vmi_munmap+0x1f1/0x2b0 [ 54.370971] mmap_region+0x1f9/0x2660 [ 54.371459] ? vm_mmap_pgoff+0x15c/0x3a0 [ 54.371975] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 54.372687] ? __pfx_lock_acquire+0x10/0x10 [ 54.373227] ? __pfx_mmap_region+0x10/0x10 [ 54.373755] ? security_mmap_addr+0x7d/0xa0 [ 54.374288] ? get_unmapped_area+0x1f5/0x3f0 [ 54.374838] do_mmap+0x854/0xf00 [ 54.375299] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.375794] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 54.376357] ksys_mmap_pgoff+0x3af/0x500 [ 54.376866] do_syscall_64+0x3f/0x90 [ 54.377369] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.378054] RIP: 0033:0x7f42cee8dd82 [ 54.378539] 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 [ 54.380772] RSP: 002b:00007ffdcbe798e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 54.381716] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f42cee8dd82 [ 54.382589] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f42ce2c7000 [ 54.383493] RBP: 00007f42ce2c7000 R08: 0000000000000009 R09: 0000000000001000 [ 54.384380] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a45c36cd90 [ 54.385263] R13: 00007ffdcbe79900 R14: 00007ffdcbe79930 R15: 00007ffdcbe79c90 [ 54.386159] [ 54.386465] [ 54.386686] Allocated by task 220: [ 54.387137] kasan_save_stack+0x22/0x50 [ 54.387665] kasan_set_track+0x25/0x30 [ 54.388177] __kasan_slab_alloc+0x59/0x70 [ 54.388724] kmem_cache_alloc+0x16b/0x370 [ 54.389260] vm_area_dup+0x20/0x160 [ 54.389733] __split_vma+0x170/0x950 [ 54.390224] split_vma+0xc6/0x110 [ 54.390684] mprotect_fixup+0x8d2/0xb30 [ 54.391222] do_mprotect_pkey+0x87e/0xd40 [ 54.391766] __x64_sys_mprotect+0x78/0xc0 [ 54.392314] do_syscall_64+0x3f/0x90 [ 54.392808] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.393479] [ 54.393702] Freed by task 220: [ 54.394106] kasan_save_stack+0x22/0x50 [ 54.394634] kasan_set_track+0x25/0x30 [ 54.395171] kasan_save_free_info+0x2b/0x50 [ 54.395733] __kasan_slab_free+0x10a/0x190 [ 54.396286] kmem_cache_free+0x10d/0x4d0 [ 54.396818] rcu_core+0x8c8/0x2860 [ 54.397283] __do_softirq+0x1b7/0x7d4 [ 54.397773] [ 54.397995] Last potentially related work creation: [ 54.398610] kasan_save_stack+0x22/0x50 [ 54.399181] __kasan_record_aux_stack+0x8e/0xa0 [ 54.399774] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.400456] remove_vma+0x139/0x170 [ 54.400927] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.401509] do_vmi_munmap+0x1f1/0x2b0 [ 54.402014] __vm_munmap+0x138/0x3a0 [ 54.402513] __x64_sys_munmap+0x59/0x80 [ 54.403050] do_syscall_64+0x3f/0x90 [ 54.403543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.404206] [ 54.404429] Second to last potentially related work creation: [ 54.405145] kasan_save_stack+0x22/0x50 [ 54.405671] __kasan_record_aux_stack+0x8e/0xa0 [ 54.406264] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.406954] remove_vma+0x139/0x170 [ 54.407424] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.408002] do_vmi_munmap+0x1f1/0x2b0 [ 54.408507] mmap_region+0x1f9/0x2660 [ 54.409004] do_mmap+0x854/0xf00 [ 54.409452] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.409959] ksys_mmap_pgoff+0x3af/0x500 [ 54.410481] do_syscall_64+0x3f/0x90 [ 54.410979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.411654] [ 54.411878] The buggy address belongs to the object at ffff888010168570 [ 54.411878] which belongs to the cache vm_area_struct of size 168 [ 54.413414] The buggy address is located 88 bytes inside of [ 54.413414] freed 168-byte region [ffff888010168570, ffff888010168618) [ 54.414882] [ 54.415126] The buggy address belongs to the physical page: [ 54.415818] page:000000003faaffd0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10168 [ 54.416968] memcg:ffff888010167001 [ 54.417415] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 54.418142] page_type: 0xffffffff() [ 54.418607] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 54.419573] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010167001 [ 54.420518] page dumped because: kasan: bad access detected [ 54.421206] [ 54.421424] Memory state around the buggy address: [ 54.422021] ffff888010168480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.422914] ffff888010168500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 54.423827] >ffff888010168580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.424713] ^ [ 54.425406] ffff888010168600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 54.426296] ffff888010168680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.427183] ================================================================== [ 54.428124] Disabling lock debugging due to kernel taint [ 56.994250] BUG: Bad rss-counter state mm:00000000339cc9d7 type:MM_FILEPAGES val:33 [ 56.995280] BUG: Bad rss-counter state mm:00000000339cc9d7 type:MM_ANONPAGES val:22 [ 57.486907] BUG: Bad rss-counter state mm:000000005c91f38e type:MM_FILEPAGES val:33 [ 57.487916] BUG: Bad rss-counter state mm:000000005c91f38e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8517' (ECDSA) to the list of known hosts. 2023/06/19 20:10:28 fuzzer started 2023/06/19 20:10:29 dialing manager at localhost:44161 2023/06/19 20:10:29 checking machine... 2023/06/19 20:10:29 checking revisions... [ 58.212257] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:10:29 testing simple program... [ 58.262866] cgroup: Unknown subsys name 'net' [ 58.325605] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:10:11 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ffe84aa0458 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=00007fb877bba5100000564e5e2ba790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801465fac8 RCX=ffffffff860d6801 RDX=0000000000000000 RSI=ffffffff81846014 RDI=ffff88801465fad4 RBP=0000000000000000 RSP=ffff88801465f9e0 R8 =ffffffff860d68fa R9 =ffff88801465fa40 R10=0000000000038001 R11=0000000000010b7e R12=ffff88801465fac8 R13=0000000000000000 R14=ffff88800eef51c0 R15=ffff88800ef20980 RIP=ffffffff813ad49e RFL=00000217 [----APC] 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 00007f5dbee09900 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=00007f5dbf3c10b0 CR3=000000000b3b6000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000