syzkaller login: [ 36.040856] BUG: Bad rss-counter state mm:000000005285a917 type:MM_FILEPAGES val:33 [ 36.041885] BUG: Bad rss-counter state mm:000000005285a917 type:MM_ANONPAGES val:22 [ 36.144977] ================================================================== [ 36.146150] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.147493] Read of size 8 at addr ffff88800e7a8c20 by task sshd/219 [ 36.148449] [ 36.148710] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.149213] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.149763] Call Trace: [ 36.149927] [ 36.150072] dump_stack_lvl+0x91/0xf0 [ 36.150326] print_report+0xcc/0x620 [ 36.150584] ? __virt_addr_valid+0x102/0x340 [ 36.150866] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.151178] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.151497] kasan_report+0xbe/0xf0 [ 36.151741] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.152060] vma_interval_tree_remove+0xc75/0xec0 [ 36.152376] vma_prepare+0xc54/0x11a0 [ 36.152631] __split_vma+0x5af/0x950 [ 36.152872] ? __pfx___split_vma+0x10/0x10 [ 36.153140] ? find_held_lock+0x2c/0x110 [ 36.153417] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.153711] ? lock_is_held_type+0x9f/0x120 [ 36.153987] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.154295] ? mtree_range_walk+0x632/0x900 [ 36.154590] ? mas_walk+0x5c7/0x7c0 [ 36.154835] do_vmi_munmap+0x1f1/0x2b0 [ 36.155089] mmap_region+0x1f9/0x2660 [ 36.155339] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.155607] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.155976] ? __pfx_lock_acquire+0x10/0x10 [ 36.156245] ? __pfx_mmap_region+0x10/0x10 [ 36.156536] ? security_mmap_addr+0x7d/0xa0 [ 36.156808] ? get_unmapped_area+0x1f5/0x3f0 [ 36.157091] do_mmap+0x854/0xf00 [ 36.157318] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.157586] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.157873] ksys_mmap_pgoff+0x3af/0x500 [ 36.158133] do_syscall_64+0x3f/0x90 [ 36.158380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.158722] RIP: 0033:0x7f31f816bd82 [ 36.158959] 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 [ 36.160044] RSP: 002b:00007ffd23cadd58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.160524] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f31f816bd82 [ 36.160959] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f31f75a5000 [ 36.161395] RBP: 00007f31f75a5000 R08: 0000000000000009 R09: 0000000000001000 [ 36.161841] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e368199b20 [ 36.162270] R13: 00007ffd23cadd70 R14: 00007ffd23cadda0 R15: 00007ffd23cae100 [ 36.162712] [ 36.162861] [ 36.162972] Allocated by task 212: [ 36.163192] kasan_save_stack+0x22/0x50 [ 36.163461] kasan_set_track+0x25/0x30 [ 36.163717] __kasan_slab_alloc+0x59/0x70 [ 36.163985] kmem_cache_alloc+0x16b/0x370 [ 36.164250] vm_area_dup+0x20/0x160 [ 36.164502] __split_vma+0x170/0x950 [ 36.164742] split_vma+0xc6/0x110 [ 36.164971] mprotect_fixup+0x8d2/0xb30 [ 36.165229] do_mprotect_pkey+0x87e/0xd40 [ 36.165506] __x64_sys_mprotect+0x78/0xc0 [ 36.165774] do_syscall_64+0x3f/0x90 [ 36.166017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.166348] [ 36.166467] Freed by task 203: [ 36.166667] kasan_save_stack+0x22/0x50 [ 36.166925] kasan_set_track+0x25/0x30 [ 36.167177] kasan_save_free_info+0x2b/0x50 [ 36.167463] __kasan_slab_free+0x10a/0x190 [ 36.167738] kmem_cache_free+0x10d/0x4d0 [ 36.167998] rcu_core+0x8c8/0x2860 [ 36.168224] __do_softirq+0x1b7/0x7d4 [ 36.168494] [ 36.168607] Last potentially related work creation: [ 36.168904] kasan_save_stack+0x22/0x50 [ 36.169162] __kasan_record_aux_stack+0x8e/0xa0 [ 36.169467] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.169800] remove_vma+0x139/0x170 [ 36.170028] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.170311] do_vmi_munmap+0x1f1/0x2b0 [ 36.170570] __vm_munmap+0x138/0x3a0 [ 36.170808] __x64_sys_munmap+0x59/0x80 [ 36.171059] do_syscall_64+0x3f/0x90 [ 36.171305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.171641] [ 36.171751] The buggy address belongs to the object at ffff88800e7a8bc8 [ 36.171751] which belongs to the cache vm_area_struct of size 168 [ 36.172508] The buggy address is located 88 bytes inside of [ 36.172508] freed 168-byte region [ffff88800e7a8bc8, ffff88800e7a8c70) [ 36.173219] [ 36.173330] The buggy address belongs to the physical page: [ 36.173675] page:000000008bfa0887 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7a8 [ 36.174224] memcg:ffff88800d760801 [ 36.174448] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.174777] page_type: 0xffffffff() [ 36.175006] raw: 0100000000000200 ffff8880087a0c80 ffffea000038dc40 dead000000000004 [ 36.175478] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d760801 [ 36.175936] page dumped because: kasan: bad access detected [ 36.176279] [ 36.176392] Memory state around the buggy address: [ 36.176694] ffff88800e7a8b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.177131] ffff88800e7a8b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 36.177581] >ffff88800e7a8c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 36.178013] ^ [ 36.178282] ffff88800e7a8c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 36.178724] ffff88800e7a8d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 36.179160] ================================================================== [ 36.179676] Disabling lock debugging due to kernel taint [ 38.268744] BUG: Bad rss-counter state mm:000000007a7c333b type:MM_FILEPAGES val:33 [ 38.269937] BUG: Bad rss-counter state mm:000000007a7c333b type:MM_ANONPAGES val:22 [ 38.679518] BUG: Bad rss-counter state mm:0000000082c16e7d type:MM_FILEPAGES val:33 [ 38.680473] BUG: Bad rss-counter state mm:0000000082c16e7d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24383' (ECDSA) to the list of known hosts. 2023/06/21 07:25:54 fuzzer started 2023/06/21 07:25:54 dialing manager at localhost:36067 2023/06/21 07:25:54 checking machine... 2023/06/21 07:25:54 checking revisions... [ 39.363756] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:25:54 testing simple program... [ 39.412506] cgroup: Unknown subsys name 'net' [ 39.456923] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:25:54 Registers: info registers vcpu 0 RAX=ffffffff85d3d358 RBX=1ffff110028e7f17 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88801473f888 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180f065 RFL=00000082 [--S----] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f572e00a900 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=00007f572d467bf0 CR3=000000000c8e8000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=59be5d32d23baf1100000000000ae988 XMM05=a170549c9d927e0e0000000000132d98 XMM06=dfcdbad4f1609c370000000000131b70 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bc0a0a RBX=ffffffff85e05050 RCX=ffffffff8186c182 RDX=0000000000000000 RSI=ffffffff861436da RDI=ffffffff85e05050 RBP=ffffffff85e05050 RSP=ffff888006a1f7b8 R8 =ffffffff861436da R9 =ffff888006a1f8b0 R10=0000000000038001 R11=00000000000229a3 R12=ffffffff85e05050 R13=ffffffff85e05050 R14=ffffffff85e05050 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007f2c399c1900 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=00007ffdc657f000 CR3=000000000f63c000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000