[ 32.827682] BUG: Bad rss-counter state mm:0000000063d2fb53 type:MM_FILEPAGES val:32 [ 32.828879] BUG: Bad rss-counter state mm:0000000063d2fb53 type:MM_ANONPAGES val:22 [ 32.967458] ================================================================== [ 32.968437] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.969429] Read of size 8 at addr ffff88800e46a880 by task sshd/219 [ 32.970471] [ 32.970757] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.971802] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.972998] Call Trace: [ 32.973382] [ 32.973744] dump_stack_lvl+0x91/0xf0 [ 32.974352] print_report+0xcc/0x620 [ 32.974956] ? __virt_addr_valid+0x102/0x340 [ 32.975616] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.976395] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.977170] kasan_report+0xbe/0xf0 [ 32.977784] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.978572] vma_interval_tree_remove+0xc75/0xec0 [ 32.979343] vma_prepare+0xc54/0x11a0 [ 32.979953] __split_vma+0x5af/0x950 [ 32.980534] ? __pfx___split_vma+0x10/0x10 [ 32.981211] ? find_held_lock+0x2c/0x110 [ 32.981888] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.982618] ? lock_is_held_type+0x9f/0x120 [ 32.983227] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.983895] ? mtree_range_walk+0x632/0x900 [ 32.984487] ? mas_walk+0x5c7/0x7c0 [ 32.985022] do_vmi_munmap+0x1f1/0x2b0 [ 32.985558] mmap_region+0x1f9/0x2660 [ 32.986112] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.986675] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.987454] ? __pfx_lock_acquire+0x10/0x10 [ 32.988039] ? __pfx_mmap_region+0x10/0x10 [ 32.988605] ? security_mmap_addr+0x7d/0xa0 [ 32.989187] ? get_unmapped_area+0x1f5/0x3f0 [ 32.989804] do_mmap+0x854/0xf00 [ 32.990293] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.990845] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.991448] ksys_mmap_pgoff+0x3af/0x500 [ 32.992012] do_syscall_64+0x3f/0x90 [ 32.992527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.993232] RIP: 0033:0x7f1bb594ed82 [ 32.993759] 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 [ 32.996079] RSP: 002b:00007ffce3e2b518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.997069] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1bb594ed82 [ 32.998009] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1bb4d88000 [ 32.998949] RBP: 00007f1bb4d88000 R08: 0000000000000009 R09: 0000000000001000 [ 32.999870] R10: 0000000000000812 R11: 0000000000000206 R12: 000056212c475f70 [ 33.000794] R13: 00007ffce3e2b530 R14: 00007ffce3e2b560 R15: 00007ffce3e2b8c0 [ 33.001738] [ 33.002071] [ 33.002303] Allocated by task 211: [ 33.002775] kasan_save_stack+0x22/0x50 [ 33.003322] kasan_set_track+0x25/0x30 [ 33.003869] __kasan_slab_alloc+0x59/0x70 [ 33.004434] kmem_cache_alloc+0x16b/0x370 [ 33.005004] vm_area_dup+0x20/0x160 [ 33.005492] __split_vma+0x170/0x950 [ 33.006018] split_vma+0xc6/0x110 [ 33.006517] mprotect_fixup+0x8d2/0xb30 [ 33.007077] do_mprotect_pkey+0x87e/0xd40 [ 33.007641] __x64_sys_mprotect+0x78/0xc0 [ 33.008219] do_syscall_64+0x3f/0x90 [ 33.008745] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.009444] [ 33.009688] Freed by task 211: [ 33.010139] kasan_save_stack+0x22/0x50 [ 33.010699] kasan_set_track+0x25/0x30 [ 33.011239] kasan_save_free_info+0x2b/0x50 [ 33.011825] __kasan_slab_free+0x10a/0x190 [ 33.012395] kmem_cache_free+0x10d/0x4d0 [ 33.012962] rcu_core+0x8c8/0x2860 [ 33.013446] __do_softirq+0x1b7/0x7d4 [ 33.013992] [ 33.014253] Last potentially related work creation: [ 33.014901] kasan_save_stack+0x22/0x50 [ 33.015444] __kasan_record_aux_stack+0x8e/0xa0 [ 33.016084] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.016788] remove_vma+0x139/0x170 [ 33.017283] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.017910] do_vmi_munmap+0x1f1/0x2b0 [ 33.018451] __vm_munmap+0x138/0x3a0 [ 33.018969] __x64_sys_munmap+0x59/0x80 [ 33.019507] do_syscall_64+0x3f/0x90 [ 33.020035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.020749] [ 33.020986] Second to last potentially related work creation: [ 33.021737] kasan_save_stack+0x22/0x50 [ 33.022290] __kasan_record_aux_stack+0x8e/0xa0 [ 33.022928] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.023623] remove_vma+0x139/0x170 [ 33.024136] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.024755] do_vmi_munmap+0x1f1/0x2b0 [ 33.025290] mmap_region+0x1f9/0x2660 [ 33.025836] do_mmap+0x854/0xf00 [ 33.026323] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.026875] ksys_mmap_pgoff+0x3af/0x500 [ 33.027424] do_syscall_64+0x3f/0x90 [ 33.027950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.028645] [ 33.028892] The buggy address belongs to the object at ffff88800e46a828 [ 33.028892] which belongs to the cache vm_area_struct of size 168 [ 33.030522] The buggy address is located 88 bytes inside of [ 33.030522] freed 168-byte region [ffff88800e46a828, ffff88800e46a8d0) [ 33.032072] [ 33.032306] The buggy address belongs to the physical page: [ 33.033032] page:00000000dc0ad964 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe46a [ 33.034247] memcg:ffff88800eeeb101 [ 33.034732] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.035494] page_type: 0xffffffff() [ 33.036010] raw: 0100000000000200 ffff88800879fc80 ffffea0000388fc0 dead000000000009 [ 33.037016] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eeeb101 [ 33.038026] page dumped because: kasan: bad access detected [ 33.038774] [ 33.039014] Memory state around the buggy address: [ 33.039637] ffff88800e46a780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 33.040577] ffff88800e46a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.041518] >ffff88800e46a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.042472] ^ [ 33.042937] ffff88800e46a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.043892] ffff88800e46a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 33.044820] ================================================================== [ 33.046217] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.012397] BUG: Bad rss-counter state mm:0000000008b7608f type:MM_FILEPAGES val:33 [ 35.013341] BUG: Bad rss-counter state mm:0000000008b7608f type:MM_ANONPAGES val:22 [ 35.476979] BUG: Bad rss-counter state mm:00000000361132d2 type:MM_FILEPAGES val:33 [ 35.478028] BUG: Bad rss-counter state mm:00000000361132d2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64204' (ECDSA) to the list of known hosts. 2023/06/20 00:29:18 fuzzer started 2023/06/20 00:29:18 dialing manager at localhost:44161 2023/06/20 00:29:18 checking machine... 2023/06/20 00:29:18 checking revisions... [ 36.219256] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:29:18 testing simple program... [ 36.276418] cgroup: Unknown subsys name 'net' [ 36.354541] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:29:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888018cdf920 RCX=0000000000000000 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff888018cdf888 RBP=ffff88800d9551c0 RSP=ffff888018cdf830 R8 =0000000000000002 R9 =0000000000000000 R10=ffff888018cdf888 R11=ffffffff81806df1 R12=0000000000000000 R13=ffff888018cdf8b0 R14=ffff88800d9551c0 R15=ffff888018cdf888 RIP=ffffffff8450d41a RFL=00000247 [---Z-PC] 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 00007f79bc559900 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=00007f79bcb10618 CR3=000000000e7ee000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800d6ffc58 RCX=ffffffff818c875e RDX=ffff88800f568000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff8880103e6000 RSP=ffff88800d6ff6c0 R8 =0000000000000005 R9 =000000000000001f R10=0000000000000020 R11=00000000000b6996 R12=ffff888016080758 R13=ffff88800d6ffc5c R14=0000000000000020 R15=0000000000000020 RIP=ffffffff814c07e0 RFL=00000212 [----A--] 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 00007f667351b900 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=00007f6672982430 CR3=000000000982e000 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=2037313a39323a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a39323a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000