syzkaller login: [ 60.140616] BUG: Bad rss-counter state mm:0000000046fac198 type:MM_FILEPAGES val:33 [ 60.141995] BUG: Bad rss-counter state mm:0000000046fac198 type:MM_ANONPAGES val:22 [ 60.303645] ================================================================== [ 60.304683] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.305853] Read of size 8 at addr ffff88800e7955c8 by task sshd/221 [ 60.306751] [ 60.307007] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 60.308027] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.309154] Call Trace: [ 60.309530] [ 60.309886] dump_stack_lvl+0x91/0xf0 [ 60.310462] print_report+0xcc/0x620 [ 60.311027] ? __virt_addr_valid+0x102/0x340 [ 60.311671] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.312394] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.313112] kasan_report+0xbe/0xf0 [ 60.313662] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.314393] vma_interval_tree_remove+0xc75/0xec0 [ 60.315090] vma_prepare+0xc54/0x11a0 [ 60.315644] __split_vma+0x5af/0x950 [ 60.316195] ? __pfx___split_vma+0x10/0x10 [ 60.316810] ? find_held_lock+0x2c/0x110 [ 60.317412] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.318078] ? lock_is_held_type+0x9f/0x120 [ 60.318702] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.319407] ? mtree_range_walk+0x632/0x900 [ 60.320045] ? mas_walk+0x5c7/0x7c0 [ 60.320591] do_vmi_munmap+0x1f1/0x2b0 [ 60.321167] mmap_region+0x1f9/0x2660 [ 60.321724] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.322343] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.323177] ? __pfx_lock_acquire+0x10/0x10 [ 60.323799] ? __pfx_mmap_region+0x10/0x10 [ 60.324421] ? security_mmap_addr+0x7d/0xa0 [ 60.325043] ? get_unmapped_area+0x1f5/0x3f0 [ 60.325679] do_mmap+0x854/0xf00 [ 60.326194] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.326770] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.327422] ksys_mmap_pgoff+0x3af/0x500 [ 60.328013] do_syscall_64+0x3f/0x90 [ 60.328569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.329320] RIP: 0033:0x7ff18b103d82 [ 60.329853] 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 [ 60.332341] RSP: 002b:00007ffdd9a18be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.333392] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff18b103d82 [ 60.334396] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff18a53d000 [ 60.335380] RBP: 00007ff18a53d000 R08: 0000000000000009 R09: 0000000000001000 [ 60.336361] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cf0558bec0 [ 60.337342] R13: 00007ffdd9a18c00 R14: 00007ffdd9a18c30 R15: 00007ffdd9a18f90 [ 60.338350] [ 60.338690] [ 60.338939] Allocated by task 214: [ 60.339438] kasan_save_stack+0x22/0x50 [ 60.340021] kasan_set_track+0x25/0x30 [ 60.340595] __kasan_slab_alloc+0x59/0x70 [ 60.341206] kmem_cache_alloc+0x16b/0x370 [ 60.341812] vm_area_dup+0x20/0x160 [ 60.342341] __split_vma+0x170/0x950 [ 60.342882] split_vma+0xc6/0x110 [ 60.343393] mprotect_fixup+0x8d2/0xb30 [ 60.343977] do_mprotect_pkey+0x87e/0xd40 [ 60.344585] __x64_sys_mprotect+0x78/0xc0 [ 60.345189] do_syscall_64+0x3f/0x90 [ 60.345739] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.346508] [ 60.346760] Freed by task 214: [ 60.347217] kasan_save_stack+0x22/0x50 [ 60.347801] kasan_set_track+0x25/0x30 [ 60.348374] kasan_save_free_info+0x2b/0x50 [ 60.348991] __kasan_slab_free+0x10a/0x190 [ 60.349608] kmem_cache_free+0x10d/0x4d0 [ 60.350200] rcu_core+0x8c8/0x2860 [ 60.350714] __do_softirq+0x1b7/0x7d4 [ 60.351263] [ 60.351515] Last potentially related work creation: [ 60.352194] kasan_save_stack+0x22/0x50 [ 60.352783] __kasan_record_aux_stack+0x8e/0xa0 [ 60.353448] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.354205] remove_vma+0x139/0x170 [ 60.354738] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.355383] do_vmi_munmap+0x1f1/0x2b0 [ 60.355946] __vm_munmap+0x138/0x3a0 [ 60.356491] __x64_sys_munmap+0x59/0x80 [ 60.357066] do_syscall_64+0x3f/0x90 [ 60.357618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.358387] [ 60.358637] The buggy address belongs to the object at ffff88800e795570 [ 60.358637] which belongs to the cache vm_area_struct of size 168 [ 60.360360] The buggy address is located 88 bytes inside of [ 60.360360] freed 168-byte region [ffff88800e795570, ffff88800e795618) [ 60.362021] [ 60.362270] The buggy address belongs to the physical page: [ 60.363046] page:00000000d15adc9a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe795 [ 60.364313] memcg:ffff88800cef9201 [ 60.364811] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 60.365623] page_type: 0xffffffff() [ 60.366160] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 60.367225] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cef9201 [ 60.368279] page dumped because: kasan: bad access detected [ 60.369054] [ 60.369301] Memory state around the buggy address: [ 60.369989] ffff88800e795480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.370987] ffff88800e795500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 60.371984] >ffff88800e795580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.372976] ^ [ 60.373749] ffff88800e795600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 60.374759] ffff88800e795680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.375758] ================================================================== [ 60.377045] Disabling lock debugging due to kernel taint [ 62.368148] BUG: Bad rss-counter state mm:0000000085236897 type:MM_FILEPAGES val:33 [ 62.369321] BUG: Bad rss-counter state mm:0000000085236897 type:MM_ANONPAGES val:22 [ 62.813440] BUG: Bad rss-counter state mm:000000005a8c472c type:MM_FILEPAGES val:33 [ 62.814630] BUG: Bad rss-counter state mm:000000005a8c472c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35277' (ECDSA) to the list of known hosts. 2023/06/20 03:29:59 fuzzer started 2023/06/20 03:29:59 dialing manager at localhost:44161 2023/06/20 03:29:59 checking machine... 2023/06/20 03:29:59 checking revisions... [ 63.513667] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:29:59 testing simple program... [ 63.566153] cgroup: Unknown subsys name 'net' [ 63.605570] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:29:59 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11001f3e601 RSI=ffffffff83c5ed43 RDI=ffff888019fe7730 RBP=ffff88800f9f3000 RSP=ffff888019fe7588 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000000 R11=000015c8000015c8 R12=0000000000000001 R13=0000000000000000 R14=ffff888019fe7728 R15=ffff888016b0a140 RIP=ffffffff83c5ed97 RFL=00000246 [---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 00007fcca3798900 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=00007fcca3d4f618 CR3=0000000009ee2000 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=0000000000000005 RBX=ffff88808db362e0 RCX=1ffffffff0ba76d3 RDX=0000000000000000 RSI=ffffffff81143144 RDI=0000000000000006 RBP=000000000db362e0 RSP=ffff88806cf09d60 R8 =0000000000000006 R9 =ffff88808db362e0 R10=000000000db362e0 R11=0000000000000000 R12=0000000000000000 R13=ffffea00006388c0 R14=ffffffff818c7463 R15=ffff88800da79900 RIP=ffffffff81143163 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 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=00007fd3cac0d2c0 CR3=000000000efba000 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=2038353a39323a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a39323a3330203032 XMM08=65747379733a755f6d65747379733d6a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000