[ 30.303247] BUG: Bad rss-counter state mm:00000000c4535cb1 type:MM_FILEPAGES val:33 [ 30.304464] BUG: Bad rss-counter state mm:00000000c4535cb1 type:MM_ANONPAGES val:22 [ 30.339695] ================================================================== [ 30.340750] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.341706] Read of size 8 at addr ffff88800f850228 by task sshd/219 [ 30.342505] [ 30.342729] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.343599] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.344581] Call Trace: [ 30.344903] [ 30.345187] dump_stack_lvl+0x91/0xf0 [ 30.345679] print_report+0xcc/0x620 [ 30.346180] ? __virt_addr_valid+0x102/0x340 [ 30.346748] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.347367] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.347987] kasan_report+0xbe/0xf0 [ 30.348465] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.349089] vma_interval_tree_remove+0xc75/0xec0 [ 30.349697] vma_prepare+0xc54/0x11a0 [ 30.350180] __split_vma+0x5af/0x950 [ 30.350679] ? __pfx___split_vma+0x10/0x10 [ 30.351214] ? find_held_lock+0x2c/0x110 [ 30.351748] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.352317] ? lock_is_held_type+0x9f/0x120 [ 30.352875] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.353498] ? mtree_range_walk+0x632/0x900 [ 30.354055] ? mas_walk+0x5c7/0x7c0 [ 30.354537] do_vmi_munmap+0x1f1/0x2b0 [ 30.355031] mmap_region+0x1f9/0x2660 [ 30.355534] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.356060] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.356776] ? __pfx_lock_acquire+0x10/0x10 [ 30.357319] ? __pfx_mmap_region+0x10/0x10 [ 30.357854] ? security_mmap_addr+0x7d/0xa0 [ 30.358393] ? get_unmapped_area+0x1f5/0x3f0 [ 30.358964] do_mmap+0x854/0xf00 [ 30.359415] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.359910] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.360486] ksys_mmap_pgoff+0x3af/0x500 [ 30.360994] do_syscall_64+0x3f/0x90 [ 30.361483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.362143] RIP: 0033:0x7f38c23f1d82 [ 30.362612] 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 [ 30.364770] RSP: 002b:00007fffbcc365e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.365678] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f38c23f1d82 [ 30.366551] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f38c182b000 [ 30.367405] RBP: 00007f38c182b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.368258] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eb5f8dad90 [ 30.369110] R13: 00007fffbcc36600 R14: 00007fffbcc36630 R15: 00007fffbcc36990 [ 30.369968] [ 30.370257] [ 30.370487] Allocated by task 212: [ 30.370921] kasan_save_stack+0x22/0x50 [ 30.371434] kasan_set_track+0x25/0x30 [ 30.371926] __kasan_slab_alloc+0x59/0x70 [ 30.372456] kmem_cache_alloc+0x16b/0x370 [ 30.372969] vm_area_dup+0x20/0x160 [ 30.373426] __split_vma+0x170/0x950 [ 30.373892] split_vma+0xc6/0x110 [ 30.374340] mprotect_fixup+0x8d2/0xb30 [ 30.374939] do_mprotect_pkey+0x87e/0xd40 [ 30.375462] __x64_sys_mprotect+0x78/0xc0 [ 30.375979] do_syscall_64+0x3f/0x90 [ 30.376464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.377111] [ 30.377329] Freed by task 212: [ 30.377725] kasan_save_stack+0x22/0x50 [ 30.378235] kasan_set_track+0x25/0x30 [ 30.378753] kasan_save_free_info+0x2b/0x50 [ 30.379289] __kasan_slab_free+0x10a/0x190 [ 30.379832] kmem_cache_free+0x10d/0x4d0 [ 30.380352] rcu_core+0x8c8/0x2860 [ 30.380800] __do_softirq+0x1b7/0x7d4 [ 30.381288] [ 30.381503] Last potentially related work creation: [ 30.382085] kasan_save_stack+0x22/0x50 [ 30.382601] __kasan_record_aux_stack+0x8e/0xa0 [ 30.383182] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.383835] remove_vma+0x139/0x170 [ 30.384285] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.384846] do_vmi_munmap+0x1f1/0x2b0 [ 30.385334] __vm_munmap+0x138/0x3a0 [ 30.385804] __x64_sys_munmap+0x59/0x80 [ 30.386311] do_syscall_64+0x3f/0x90 [ 30.386800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.387463] [ 30.387682] The buggy address belongs to the object at ffff88800f8501d0 [ 30.387682] which belongs to the cache vm_area_struct of size 168 [ 30.389168] The buggy address is located 88 bytes inside of [ 30.389168] freed 168-byte region [ffff88800f8501d0, ffff88800f850278) [ 30.390604] [ 30.390819] The buggy address belongs to the physical page: [ 30.391493] page:00000000b9b7620a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf850 [ 30.392586] memcg:ffff88800df38501 [ 30.393010] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.393725] page_type: 0xffffffff() [ 30.394181] raw: 0100000000000200 ffff8880087a0c80 ffffea00003dcd80 dead000000000003 [ 30.395114] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df38501 [ 30.396028] page dumped because: kasan: bad access detected [ 30.396710] [ 30.396935] Memory state around the buggy address: [ 30.397518] ffff88800f850100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.398369] ffff88800f850180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.399222] >ffff88800f850200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.400079] ^ [ 30.400644] ffff88800f850280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.401502] ffff88800f850300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.402344] ================================================================== [ 30.403322] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.437292] BUG: Bad rss-counter state mm:00000000d5bff200 type:MM_FILEPAGES val:33 [ 32.438022] BUG: Bad rss-counter state mm:00000000d5bff200 type:MM_ANONPAGES val:22 [ 32.908301] BUG: Bad rss-counter state mm:00000000fbd02482 type:MM_FILEPAGES val:33 [ 32.909508] BUG: Bad rss-counter state mm:00000000fbd02482 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13512' (ECDSA) to the list of known hosts. 2023/06/21 06:02:36 fuzzer started 2023/06/21 06:02:37 dialing manager at localhost:36067 2023/06/21 06:02:37 checking machine... 2023/06/21 06:02:37 checking revisions... [ 33.634030] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:02:37 testing simple program... [ 33.667525] cgroup: Unknown subsys name 'net' [ 33.710819] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:02:36 Registers: info registers vcpu 0 RAX=ffffffff860a1445 RBX=0000000000000002 RCX=ffffffff860a1440 RDX=dffffc0000000000 RSI=0000000000000000 RDI=1ffffffff0c14288 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =ffffffff860a1444 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=000000000000792d R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff81130aa4 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 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=00007f3e948ce2b0 CR3=000000000cb4e000 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=26b97780267f769cb64e532703bb8b3a XMM02=ec2efd57dc4c00df000000000011a100 XMM03=3a707b087f22fc18000000000011a1d0 XMM04=3000ff53eedea06f00000000000ae988 XMM05=dfcdbad4f1609c370000000000130b68 XMM06=a0aba6252c0101e8000000000012f5d8 XMM07=e042d86d42eb936e0000000000121298 XMM08=3a707b087f22fc18000000000011a1d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff81130399 RCX=ffffffff860acb01 RDX=1ffff1100d9e1359 RSI=0000000000000000 RDI=ffffffff81130399 RBP=ffffffff81130399 RSP=ffff88806cf09a18 R8 =ffffffff860acb2c R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000097aa R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff88800fa58000 R15=ffff88800dbcc180 RIP=ffffffff811fc6f7 RFL=00000286 [--S--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 00007f24c1068900 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=00007f24c1047020 CR3=000000000d9d6000 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