syzkaller login: [ 44.972920] BUG: Bad rss-counter state mm:000000004419a650 type:MM_FILEPAGES val:33 [ 44.974395] BUG: Bad rss-counter state mm:000000004419a650 type:MM_ANONPAGES val:22 [ 45.117199] ================================================================== [ 45.118101] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.119032] Read of size 8 at addr ffff88800e3b34e0 by task sshd/226 [ 45.119802] [ 45.120116] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.120979] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.121937] Call Trace: [ 45.122270] [ 45.122553] dump_stack_lvl+0x91/0xf0 [ 45.123049] print_report+0xcc/0x620 [ 45.123570] ? __virt_addr_valid+0x102/0x340 [ 45.124125] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.124753] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.125368] kasan_report+0xbe/0xf0 [ 45.125838] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.126452] vma_interval_tree_remove+0xc75/0xec0 [ 45.127047] vma_prepare+0xc54/0x11a0 [ 45.127545] __split_vma+0x5af/0x950 [ 45.128020] ? __pfx___split_vma+0x10/0x10 [ 45.128553] ? find_held_lock+0x2c/0x110 [ 45.129079] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.129646] ? lock_is_held_type+0x9f/0x120 [ 45.130177] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.130792] ? mtree_range_walk+0x632/0x900 [ 45.131339] ? mas_walk+0x5c7/0x7c0 [ 45.131825] do_vmi_munmap+0x1f1/0x2b0 [ 45.132318] mmap_region+0x1f9/0x2660 [ 45.132795] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.133304] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.134014] ? __pfx_lock_acquire+0x10/0x10 [ 45.134553] ? __pfx_mmap_region+0x10/0x10 [ 45.135080] ? security_mmap_addr+0x7d/0xa0 [ 45.135627] ? get_unmapped_area+0x1f5/0x3f0 [ 45.136173] do_mmap+0x854/0xf00 [ 45.136610] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.137103] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.137661] ksys_mmap_pgoff+0x3af/0x500 [ 45.138170] do_syscall_64+0x3f/0x90 [ 45.138644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.139286] RIP: 0033:0x7f5461e2fd82 [ 45.139752] 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 [ 45.141874] RSP: 002b:00007ffeba0c2868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.142784] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5461e2fd82 [ 45.143647] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5461269000 [ 45.144506] RBP: 00007f5461269000 R08: 0000000000000009 R09: 0000000000001000 [ 45.145385] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ec7a9dcec0 [ 45.146269] R13: 00007ffeba0c2880 R14: 00007ffeba0c28b0 R15: 00007ffeba0c2c10 [ 45.147144] [ 45.147472] [ 45.147703] Allocated by task 219: [ 45.148157] kasan_save_stack+0x22/0x50 [ 45.148674] kasan_set_track+0x25/0x30 [ 45.149166] __kasan_slab_alloc+0x59/0x70 [ 45.149688] kmem_cache_alloc+0x16b/0x370 [ 45.150199] vm_area_dup+0x20/0x160 [ 45.150658] __split_vma+0x170/0x950 [ 45.151125] split_vma+0xc6/0x110 [ 45.151575] mprotect_fixup+0x8d2/0xb30 [ 45.152074] do_mprotect_pkey+0x87e/0xd40 [ 45.152602] __x64_sys_mprotect+0x78/0xc0 [ 45.153120] do_syscall_64+0x3f/0x90 [ 45.153593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.154231] [ 45.154454] Freed by task 219: [ 45.154857] kasan_save_stack+0x22/0x50 [ 45.155373] kasan_set_track+0x25/0x30 [ 45.155893] kasan_save_free_info+0x2b/0x50 [ 45.156444] __kasan_slab_free+0x10a/0x190 [ 45.156987] kmem_cache_free+0x10d/0x4d0 [ 45.157514] rcu_core+0x8c8/0x2860 [ 45.157987] __do_softirq+0x1b7/0x7d4 [ 45.158475] [ 45.158694] Last potentially related work creation: [ 45.159279] kasan_save_stack+0x22/0x50 [ 45.159800] __kasan_record_aux_stack+0x8e/0xa0 [ 45.160378] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.161023] remove_vma+0x139/0x170 [ 45.161476] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.162026] do_vmi_munmap+0x1f1/0x2b0 [ 45.162513] __vm_munmap+0x138/0x3a0 [ 45.162980] __x64_sys_munmap+0x59/0x80 [ 45.163484] do_syscall_64+0x3f/0x90 [ 45.163954] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.164594] [ 45.164807] Second to last potentially related work creation: [ 45.165488] kasan_save_stack+0x22/0x50 [ 45.165986] __kasan_record_aux_stack+0x8e/0xa0 [ 45.166561] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.167203] remove_vma+0x139/0x170 [ 45.167661] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.168219] do_vmi_munmap+0x1f1/0x2b0 [ 45.168698] __vm_munmap+0x138/0x3a0 [ 45.169167] __x64_sys_munmap+0x59/0x80 [ 45.169689] do_syscall_64+0x3f/0x90 [ 45.170171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.170836] [ 45.171058] The buggy address belongs to the object at ffff88800e3b3488 [ 45.171058] which belongs to the cache vm_area_struct of size 168 [ 45.172602] The buggy address is located 88 bytes inside of [ 45.172602] freed 168-byte region [ffff88800e3b3488, ffff88800e3b3530) [ 45.174099] [ 45.174321] The buggy address belongs to the physical page: [ 45.175016] page:00000000d1e7e148 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3b3 [ 45.176169] memcg:ffff88800e34cf01 [ 45.176618] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.177300] page_type: 0xffffffff() [ 45.177768] raw: 0100000000000200 ffff88800879fc80 ffffea000036e000 dead000000000006 [ 45.178734] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e34cf01 [ 45.179689] page dumped because: kasan: bad access detected [ 45.180383] [ 45.180606] Memory state around the buggy address: [ 45.181211] ffff88800e3b3380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 45.182093] ffff88800e3b3400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 45.182982] >ffff88800e3b3480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.183870] ^ [ 45.184656] ffff88800e3b3500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 45.185548] ffff88800e3b3580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.186451] ================================================================== [ 45.187470] Disabling lock debugging due to kernel taint [ 47.131881] BUG: Bad rss-counter state mm:00000000986cdf30 type:MM_FILEPAGES val:33 [ 47.132907] BUG: Bad rss-counter state mm:00000000986cdf30 type:MM_ANONPAGES val:22 [ 47.595254] BUG: Bad rss-counter state mm:000000005a9ec74f type:MM_FILEPAGES val:33 [ 47.596589] BUG: Bad rss-counter state mm:000000005a9ec74f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48643' (ECDSA) to the list of known hosts. 2023/06/19 13:54:59 fuzzer started 2023/06/19 13:55:00 dialing manager at localhost:44161 2023/06/19 13:55:00 checking machine... 2023/06/19 13:55:00 checking revisions... [ 48.351636] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:55:00 testing simple program... [ 48.397527] cgroup: Unknown subsys name 'net' [ 48.454908] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:54:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f645cecc2fd RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=00007f645cecc2fd RSP=ffff8880147c7580 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff8880147c7698 R13=0000000000000000 R14=ffffffff85652988 R15=ffff888016a24980 RIP=ffffffff814c8520 RFL=00000286 [--S--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 00007f645c602900 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=00007f645ba42540 CR3=000000000c612000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=65b70e02944b3adc00000000000ae988 XMM05=50017371aeb0491e0000000000134ce8 XMM06=13e856d8d71426c80000000000133a18 XMM07=fb795ef6d657705600000000001231e0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=00007fc6e16b5d77 RCX=0000000080000000 RDX=1ffff11003a03f24 RSI=ffffffff81007b50 RDI=00007fc6e16b5d77 RBP=00007fc6e16b5d77 RSP=ffff88801d01f848 R8 =ffffffff864b9d5a R9 =ffff88801d01f908 R10=0000000000038001 R11=00000000000b6996 R12=ffff88801d01f990 R13=0000000000000000 R14=ffff888016f69b40 R15=ffff88801645dd98 RIP=ffffffff814c07f1 RFL=00000207 [-----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 00007fc6e11ce900 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=00007fc6e1785618 CR3=000000000e6b4000 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=563412feff00545000000000000080fe 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