syzkaller login: [ 52.106177] BUG: Bad rss-counter state mm:00000000bf77eda8 type:MM_FILEPAGES val:33 [ 52.107446] BUG: Bad rss-counter state mm:00000000bf77eda8 type:MM_ANONPAGES val:22 [ 52.152637] ================================================================== [ 52.153885] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 52.155133] Read of size 8 at addr ffff888019c8c140 by task sshd/221 [ 52.156146] [ 52.156428] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 52.157539] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 52.158808] Call Trace: [ 52.159230] [ 52.159604] dump_stack_lvl+0x91/0xf0 [ 52.160242] print_report+0xcc/0x620 [ 52.160864] ? __virt_addr_valid+0x102/0x340 [ 52.161573] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.162346] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.162976] kasan_report+0xbe/0xf0 [ 52.163466] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.164099] vma_interval_tree_remove+0xc75/0xec0 [ 52.164706] vma_prepare+0xc54/0x11a0 [ 52.165198] __split_vma+0x5af/0x950 [ 52.165670] ? __pfx___split_vma+0x10/0x10 [ 52.166219] ? find_held_lock+0x2c/0x110 [ 52.166744] do_vmi_align_munmap+0x2ba/0x11f0 [ 52.167306] ? lock_is_held_type+0x9f/0x120 [ 52.167836] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 52.168432] ? mtree_range_walk+0x632/0x900 [ 52.168977] ? mas_walk+0x5c7/0x7c0 [ 52.169445] do_vmi_munmap+0x1f1/0x2b0 [ 52.169931] mmap_region+0x1f9/0x2660 [ 52.170416] ? vm_mmap_pgoff+0x15c/0x3a0 [ 52.170922] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 52.171630] ? __pfx_lock_acquire+0x10/0x10 [ 52.172160] ? __pfx_mmap_region+0x10/0x10 [ 52.172689] ? security_mmap_addr+0x7d/0xa0 [ 52.173214] ? get_unmapped_area+0x1f5/0x3f0 [ 52.173759] do_mmap+0x854/0xf00 [ 52.174206] vm_mmap_pgoff+0x1a6/0x3a0 [ 52.174696] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 52.175260] ksys_mmap_pgoff+0x3af/0x500 [ 52.175768] do_syscall_64+0x3f/0x90 [ 52.176240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.176874] RIP: 0033:0x7f4870063d82 [ 52.177333] 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 [ 52.179461] RSP: 002b:00007fff428b8e58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 52.180355] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4870063d82 [ 52.181188] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f486f49d000 [ 52.182031] RBP: 00007f486f49d000 R08: 0000000000000009 R09: 0000000000001000 [ 52.182870] R10: 0000000000000812 R11: 0000000000000206 R12: 000055859151aec0 [ 52.183718] R13: 00007fff428b8e70 R14: 00007fff428b8ea0 R15: 00007fff428b9200 [ 52.184565] [ 52.184852] [ 52.185064] Allocated by task 214: [ 52.185486] kasan_save_stack+0x22/0x50 [ 52.185983] kasan_set_track+0x25/0x30 [ 52.186478] __kasan_slab_alloc+0x59/0x70 [ 52.187001] kmem_cache_alloc+0x16b/0x370 [ 52.187509] vm_area_dup+0x20/0x160 [ 52.187957] __split_vma+0x170/0x950 [ 52.188418] split_vma+0xc6/0x110 [ 52.188852] mprotect_fixup+0x8d2/0xb30 [ 52.189347] do_mprotect_pkey+0x87e/0xd40 [ 52.189860] __x64_sys_mprotect+0x78/0xc0 [ 52.190397] do_syscall_64+0x3f/0x90 [ 52.190870] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.191506] [ 52.191720] Freed by task 214: [ 52.192117] kasan_save_stack+0x22/0x50 [ 52.192618] kasan_set_track+0x25/0x30 [ 52.193116] kasan_save_free_info+0x2b/0x50 [ 52.193644] __kasan_slab_free+0x10a/0x190 [ 52.194185] kmem_cache_free+0x10d/0x4d0 [ 52.194686] rcu_core+0x8c8/0x2860 [ 52.195125] __do_softirq+0x1b7/0x7d4 [ 52.195605] [ 52.195825] Last potentially related work creation: [ 52.196409] kasan_save_stack+0x22/0x50 [ 52.196913] __kasan_record_aux_stack+0x8e/0xa0 [ 52.197484] __call_rcu_common.constprop.0+0x6a/0xb90 [ 52.198121] remove_vma+0x139/0x170 [ 52.198598] do_vmi_align_munmap+0xd4a/0x11f0 [ 52.199155] do_vmi_munmap+0x1f1/0x2b0 [ 52.199637] __vm_munmap+0x138/0x3a0 [ 52.200104] __x64_sys_munmap+0x59/0x80 [ 52.200600] do_syscall_64+0x3f/0x90 [ 52.201082] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.201723] [ 52.201935] Second to last potentially related work creation: [ 52.202625] kasan_save_stack+0x22/0x50 [ 52.203133] __kasan_record_aux_stack+0x8e/0xa0 [ 52.203713] __call_rcu_common.constprop.0+0x6a/0xb90 [ 52.204364] remove_vma+0x139/0x170 [ 52.204821] do_vmi_align_munmap+0xd4a/0x11f0 [ 52.205380] do_vmi_munmap+0x1f1/0x2b0 [ 52.205868] mmap_region+0x1f9/0x2660 [ 52.206358] do_mmap+0x854/0xf00 [ 52.206797] vm_mmap_pgoff+0x1a6/0x3a0 [ 52.207286] ksys_mmap_pgoff+0x3af/0x500 [ 52.207787] do_syscall_64+0x3f/0x90 [ 52.208259] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.208893] [ 52.209112] The buggy address belongs to the object at ffff888019c8c0e8 [ 52.209112] which belongs to the cache vm_area_struct of size 168 [ 52.210589] The buggy address is located 88 bytes inside of [ 52.210589] freed 168-byte region [ffff888019c8c0e8, ffff888019c8c190) [ 52.211988] [ 52.212206] The buggy address belongs to the physical page: [ 52.212862] page:00000000562d9be1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c8c [ 52.213956] memcg:ffff88800ed79c01 [ 52.214392] flags: 0x100000000000200(slab|node=0|zone=1) [ 52.215034] page_type: 0xffffffff() [ 52.215484] raw: 0100000000000200 ffff88800879fc80 ffffea00003b5ec0 000000000000000c [ 52.216396] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed79c01 [ 52.217299] page dumped because: kasan: bad access detected [ 52.217953] [ 52.218181] Memory state around the buggy address: [ 52.218758] ffff888019c8c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.219611] ffff888019c8c080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 52.220466] >ffff888019c8c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.221313] ^ [ 52.221947] ffff888019c8c180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 52.222814] ffff888019c8c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 52.223662] ================================================================== [ 52.224981] Disabling lock debugging due to kernel taint [ 54.056122] BUG: Bad rss-counter state mm:000000002577c2e3 type:MM_FILEPAGES val:33 [ 54.057119] BUG: Bad rss-counter state mm:000000002577c2e3 type:MM_ANONPAGES val:22 [ 54.633382] BUG: Bad rss-counter state mm:000000001c4da64c type:MM_FILEPAGES val:33 [ 54.634527] BUG: Bad rss-counter state mm:000000001c4da64c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50488' (ECDSA) to the list of known hosts. 2023/06/19 16:52:49 fuzzer started 2023/06/19 16:52:50 dialing manager at localhost:44161 2023/06/19 16:52:50 checking machine... 2023/06/19 16:52:50 checking revisions... [ 55.293287] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:52:50 testing simple program... [ 55.345376] cgroup: Unknown subsys name 'net' [ 55.385401] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:52:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000008 RCX=0000000000000000 RDX=0000000000000018 RSI=0000000000000000 RDI=ffff88800fdea004 RBP=0000000000000018 RSP=ffff888016757390 R8 =0000000000000004 R9 =0000000000000018 R10=0000000000000ec0 R11=00000000000b6996 R12=ffff88800fdea000 R13=00000000000000e6 R14=0000000000000002 R15=0000000000000014 RIP=ffffffff838636d0 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 00007f23b88ef900 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=00007f23b8ea6618 CR3=000000001c992000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f652678e250 CR3=000000000d5ac000 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=f915225236894e92e5445faa1194cc62 XMM02=000000000011d5c0ec2efd57dc4c00df XMM03=0000000000123f80ad3702ec5aa21661 XMM04=54c459742d7d0f0d00000000000ae988 XMM05=e4cb8bb95a7664b60000000000134ba0 XMM06=092e7ebab295661f0000000000133d78 XMM07=e042d86d42eb936e0000000000124200 XMM08=ad3702ec5aa21661000000000011d620 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000