syzkaller login: [ 85.075246] BUG: Bad rss-counter state mm:0000000013d2ca4e type:MM_FILEPAGES val:33 [ 85.076431] BUG: Bad rss-counter state mm:0000000013d2ca4e type:MM_ANONPAGES val:22 [ 85.116206] ================================================================== [ 85.117240] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 85.118467] Read of size 8 at addr ffff88800f58e968 by task sshd/220 [ 85.119322] [ 85.119569] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 85.120702] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 85.121796] Call Trace: [ 85.122154] [ 85.122469] dump_stack_lvl+0x91/0xf0 [ 85.123023] print_report+0xcc/0x620 [ 85.123566] ? __virt_addr_valid+0x102/0x340 [ 85.124182] ? vma_interval_tree_remove+0xc75/0xec0 [ 85.124873] ? vma_interval_tree_remove+0xc75/0xec0 [ 85.125585] kasan_report+0xbe/0xf0 [ 85.126163] ? vma_interval_tree_remove+0xc75/0xec0 [ 85.126901] vma_interval_tree_remove+0xc75/0xec0 [ 85.127598] vma_prepare+0xc54/0x11a0 [ 85.128161] __split_vma+0x5af/0x950 [ 85.128709] ? __pfx___split_vma+0x10/0x10 [ 85.129330] ? find_held_lock+0x2c/0x110 [ 85.129949] do_vmi_align_munmap+0x2ba/0x11f0 [ 85.130602] ? lock_is_held_type+0x9f/0x120 [ 85.131232] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 85.131933] ? mtree_range_walk+0x632/0x900 [ 85.132583] ? mas_walk+0x5c7/0x7c0 [ 85.133143] do_vmi_munmap+0x1f1/0x2b0 [ 85.133718] mmap_region+0x1f9/0x2660 [ 85.134300] ? vm_mmap_pgoff+0x15c/0x3a0 [ 85.134902] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 85.135750] ? __pfx_lock_acquire+0x10/0x10 [ 85.136377] ? __pfx_mmap_region+0x10/0x10 [ 85.136984] ? security_mmap_addr+0x7d/0xa0 [ 85.137618] ? get_unmapped_area+0x1f5/0x3f0 [ 85.138274] do_mmap+0x854/0xf00 [ 85.138781] vm_mmap_pgoff+0x1a6/0x3a0 [ 85.139368] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 85.140024] ksys_mmap_pgoff+0x3af/0x500 [ 85.140617] do_syscall_64+0x3f/0x90 [ 85.141171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 85.141940] RIP: 0033:0x7f62a0b49d82 [ 85.142479] 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 [ 85.144900] RSP: 002b:00007ffc34743428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 85.145949] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f62a0b49d82 [ 85.146913] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f629ff83000 [ 85.147870] RBP: 00007f629ff83000 R08: 0000000000000009 R09: 0000000000001000 [ 85.148828] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b59a2d3ec0 [ 85.149794] R13: 00007ffc34743440 R14: 00007ffc34743470 R15: 00007ffc347437d0 [ 85.150762] [ 85.151094] [ 85.151340] Allocated by task 213: [ 85.151842] kasan_save_stack+0x22/0x50 [ 85.152424] kasan_set_track+0x25/0x30 [ 85.153002] __kasan_slab_alloc+0x59/0x70 [ 85.153617] kmem_cache_alloc+0x16b/0x370 [ 85.154223] vm_area_dup+0x20/0x160 [ 85.154760] __split_vma+0x170/0x950 [ 85.155308] split_vma+0xc6/0x110 [ 85.155825] mprotect_fixup+0x8d2/0xb30 [ 85.156415] do_mprotect_pkey+0x87e/0xd40 [ 85.157025] __x64_sys_mprotect+0x78/0xc0 [ 85.157642] do_syscall_64+0x3f/0x90 [ 85.158215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 85.158961] [ 85.159219] Freed by task 213: [ 85.159671] kasan_save_stack+0x22/0x50 [ 85.160253] kasan_set_track+0x25/0x30 [ 85.160829] kasan_save_free_info+0x2b/0x50 [ 85.161444] __kasan_slab_free+0x10a/0x190 [ 85.162078] kmem_cache_free+0x10d/0x4d0 [ 85.162667] rcu_core+0x8c8/0x2860 [ 85.163177] __do_softirq+0x1b7/0x7d4 [ 85.163736] [ 85.163984] Last potentially related work creation: [ 85.164670] kasan_save_stack+0x22/0x50 [ 85.165258] __kasan_record_aux_stack+0x8e/0xa0 [ 85.165947] __call_rcu_common.constprop.0+0x6a/0xb90 [ 85.166695] remove_vma+0x139/0x170 [ 85.167224] do_vmi_align_munmap+0xd4a/0x11f0 [ 85.167875] do_vmi_munmap+0x1f1/0x2b0 [ 85.168443] __vm_munmap+0x138/0x3a0 [ 85.168988] __x64_sys_munmap+0x59/0x80 [ 85.169574] do_syscall_64+0x3f/0x90 [ 85.170136] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 85.170895] [ 85.171143] The buggy address belongs to the object at ffff88800f58e910 [ 85.171143] which belongs to the cache vm_area_struct of size 168 [ 85.172879] The buggy address is located 88 bytes inside of [ 85.172879] freed 168-byte region [ffff88800f58e910, ffff88800f58e9b8) [ 85.174552] [ 85.174808] The buggy address belongs to the physical page: [ 85.175582] page:00000000616dbca9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf58e [ 85.176864] memcg:ffff88800e195301 [ 85.177362] flags: 0x100000000000200(slab|node=0|zone=1) [ 85.178143] page_type: 0xffffffff() [ 85.178673] raw: 0100000000000200 ffff88800879fc80 ffffea00005aef80 dead000000000002 [ 85.179751] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e195301 [ 85.180814] page dumped because: kasan: bad access detected [ 85.181593] [ 85.181855] Memory state around the buggy address: [ 85.182548] ffff88800f58e800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 85.183551] ffff88800f58e880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 85.184563] >ffff88800f58e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 85.185553] ^ [ 85.186479] ffff88800f58e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 85.187480] ffff88800f58ea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 85.188475] ================================================================== [ 85.190086] Disabling lock debugging due to kernel taint [ 87.398564] BUG: Bad rss-counter state mm:000000002e0f9c8e type:MM_FILEPAGES val:33 [ 87.399729] BUG: Bad rss-counter state mm:000000002e0f9c8e type:MM_ANONPAGES val:22 [ 87.827098] BUG: Bad rss-counter state mm:00000000750a5ce2 type:MM_FILEPAGES val:33 [ 87.828097] BUG: Bad rss-counter state mm:00000000750a5ce2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58948' (ECDSA) to the list of known hosts. 2023/06/19 15:09:21 fuzzer started 2023/06/19 15:09:21 dialing manager at localhost:44161 2023/06/19 15:09:21 checking machine... 2023/06/19 15:09:21 checking revisions... [ 88.553485] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:09:21 testing simple program... [ 88.603563] cgroup: Unknown subsys name 'net' [ 88.644126] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:08:19 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffc9bada2d8 CR3=0000000005482000 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=00007f8e7ab86510000055e333624790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888009a2b728 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff8880166bf4e0 R8 =0000000000000000 R9 =0000000000000000 R10=00000000000000e5 R11=00001fe500001fe5 R12=0000000000000000 R13=00000000000000e5 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8e2a 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 00007f24258ae900 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=00007f2425e65618 CR3=000000000e37c000 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=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