[ 31.970050] BUG: Bad rss-counter state mm:00000000b4a9d67e type:MM_FILEPAGES val:33 [ 31.971306] BUG: Bad rss-counter state mm:00000000b4a9d67e type:MM_ANONPAGES val:22 [ 32.007748] ================================================================== [ 32.008723] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.009657] Read of size 8 at addr ffff88800c51e6b0 by task sshd/220 [ 32.010515] [ 32.010733] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.011611] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.012605] Call Trace: [ 32.012931] [ 32.013214] dump_stack_lvl+0x91/0xf0 [ 32.013709] print_report+0xcc/0x620 [ 32.014199] ? __virt_addr_valid+0x102/0x340 [ 32.014748] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.015382] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.015999] kasan_report+0xbe/0xf0 [ 32.016476] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.017097] vma_interval_tree_remove+0xc75/0xec0 [ 32.017706] vma_prepare+0xc54/0x11a0 [ 32.018183] __split_vma+0x5af/0x950 [ 32.018662] ? __pfx___split_vma+0x10/0x10 [ 32.019203] ? find_held_lock+0x2c/0x110 [ 32.019731] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.020305] ? lock_is_held_type+0x9f/0x120 [ 32.020852] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.021464] ? mtree_range_walk+0x632/0x900 [ 32.022021] ? mas_walk+0x5c7/0x7c0 [ 32.022501] do_vmi_munmap+0x1f1/0x2b0 [ 32.022999] mmap_region+0x1f9/0x2660 [ 32.023504] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.024017] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.024733] ? __pfx_lock_acquire+0x10/0x10 [ 32.025268] ? __pfx_mmap_region+0x10/0x10 [ 32.025808] ? security_mmap_addr+0x7d/0xa0 [ 32.026341] ? get_unmapped_area+0x1f5/0x3f0 [ 32.026899] do_mmap+0x854/0xf00 [ 32.027352] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.027850] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.028416] ksys_mmap_pgoff+0x3af/0x500 [ 32.028930] do_syscall_64+0x3f/0x90 [ 32.029416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.030065] RIP: 0033:0x7fa6cb273d82 [ 32.030525] 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 [ 32.032684] RSP: 002b:00007ffcd514bb48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.033594] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa6cb273d82 [ 32.034443] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa6ca6ad000 [ 32.035290] RBP: 00007fa6ca6ad000 R08: 0000000000000009 R09: 0000000000001000 [ 32.036151] R10: 0000000000000812 R11: 0000000000000206 R12: 00005568aad89b20 [ 32.037025] R13: 00007ffcd514bb60 R14: 00007ffcd514bb90 R15: 00007ffcd514bef0 [ 32.037878] [ 32.038177] [ 32.038395] Allocated by task 212: [ 32.038832] kasan_save_stack+0x22/0x50 [ 32.039351] kasan_set_track+0x25/0x30 [ 32.039849] __kasan_slab_alloc+0x59/0x70 [ 32.040377] kmem_cache_alloc+0x16b/0x370 [ 32.040902] vm_area_dup+0x20/0x160 [ 32.041362] __split_vma+0x170/0x950 [ 32.041827] split_vma+0xc6/0x110 [ 32.042265] mprotect_fixup+0x8d2/0xb30 [ 32.042772] do_mprotect_pkey+0x87e/0xd40 [ 32.043322] __x64_sys_mprotect+0x78/0xc0 [ 32.043843] do_syscall_64+0x3f/0x90 [ 32.044326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.044981] [ 32.045195] Freed by task 212: [ 32.045589] kasan_save_stack+0x22/0x50 [ 32.046094] kasan_set_track+0x25/0x30 [ 32.046594] kasan_save_free_info+0x2b/0x50 [ 32.047135] __kasan_slab_free+0x10a/0x190 [ 32.047673] kmem_cache_free+0x10d/0x4d0 [ 32.048190] rcu_core+0x8c8/0x2860 [ 32.048640] __do_softirq+0x1b7/0x7d4 [ 32.049123] [ 32.049340] Last potentially related work creation: [ 32.049923] kasan_save_stack+0x22/0x50 [ 32.050427] __kasan_record_aux_stack+0x8e/0xa0 [ 32.051001] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.051660] remove_vma+0x139/0x170 [ 32.052114] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.052676] do_vmi_munmap+0x1f1/0x2b0 [ 32.053176] __vm_munmap+0x138/0x3a0 [ 32.053649] __x64_sys_munmap+0x59/0x80 [ 32.054145] do_syscall_64+0x3f/0x90 [ 32.054618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.055281] [ 32.055498] Second to last potentially related work creation: [ 32.056182] kasan_save_stack+0x22/0x50 [ 32.056687] __kasan_record_aux_stack+0x8e/0xa0 [ 32.057272] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.057930] remove_vma+0x139/0x170 [ 32.058385] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.058945] do_vmi_munmap+0x1f1/0x2b0 [ 32.059462] mmap_region+0x1f9/0x2660 [ 32.059936] do_mmap+0x854/0xf00 [ 32.060373] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.060871] ksys_mmap_pgoff+0x3af/0x500 [ 32.061376] do_syscall_64+0x3f/0x90 [ 32.061862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.062506] [ 32.062723] The buggy address belongs to the object at ffff88800c51e658 [ 32.062723] which belongs to the cache vm_area_struct of size 168 [ 32.064196] The buggy address is located 88 bytes inside of [ 32.064196] freed 168-byte region [ffff88800c51e658, ffff88800c51e700) [ 32.065607] [ 32.065825] The buggy address belongs to the physical page: [ 32.066492] page:000000009c1f07b9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc51e [ 32.067581] memcg:ffff88800df6a201 [ 32.068014] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.068671] page_type: 0xffffffff() [ 32.069128] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a7200 dead000000000006 [ 32.070078] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df6a201 [ 32.070995] page dumped because: kasan: bad access detected [ 32.071679] [ 32.071897] Memory state around the buggy address: [ 32.072479] ffff88800c51e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.073332] ffff88800c51e600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.074185] >ffff88800c51e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.075030] ^ [ 32.075615] ffff88800c51e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.076483] ffff88800c51e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.077331] ================================================================== [ 32.078381] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.567661] BUG: Bad rss-counter state mm:0000000051f5a890 type:MM_FILEPAGES val:33 [ 34.568668] BUG: Bad rss-counter state mm:0000000051f5a890 type:MM_ANONPAGES val:22 [ 35.079522] BUG: Bad rss-counter state mm:000000001d3c18ce type:MM_FILEPAGES val:33 [ 35.080416] BUG: Bad rss-counter state mm:000000001d3c18ce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17947' (ECDSA) to the list of known hosts. 2023/06/20 12:19:25 fuzzer started 2023/06/20 12:19:25 dialing manager at localhost:36067 2023/06/20 12:19:25 checking machine... 2023/06/20 12:19:25 checking revisions... [ 35.808707] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:19:25 testing simple program... [ 35.858626] cgroup: Unknown subsys name 'net' [ 35.942116] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:19:25 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=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=00007fddde8a22a0 CR3=000000000da12000 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=c9a02397aede3aa467400bc32b17fcdc XMM02=000000000011c1e8ec2efd57dc4c00df XMM03=0000000000122410100e5104de43415d XMM04=66db8a0af9ab023e00000000000ae988 XMM05=11fb2a2bddbf39ed00000000001344c0 XMM06=4fda316b135da52b00000000001331f0 XMM07=e042d86d42eb936e00000000001226e8 XMM08=100e5104de43415d000000000011c248 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbfb97 RBX=ffffffff85dfdcbc RCX=ffffffff81809a90 RDX=0000000000000000 RSI=ffffffff86138976 RDI=ffffffff85dfdcb8 RBP=ffffffff85dfdcb8 RSP=ffff88800f0d7678 R8 =ffffffff86138976 R9 =ffff88800f0d7770 R10=0000000000038001 R11=0000000000020cbd R12=ffffffff85dfdcc0 R13=ffffffff85dfdcb8 R14=ffffffff85dfdcb8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f61ddb31900 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=00007ffe455d7000 CR3=000000000dc1c000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000