syzkaller login: [ 31.058535] BUG: Bad rss-counter state mm:000000000c0a8e8b type:MM_FILEPAGES val:33 [ 31.059730] BUG: Bad rss-counter state mm:000000000c0a8e8b type:MM_ANONPAGES val:22 [ 31.100873] ================================================================== [ 31.102186] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.103610] Read of size 8 at addr ffff88800fd54c20 by task sshd/220 [ 31.104719] [ 31.104999] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.106174] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.107450] Call Trace: [ 31.107846] [ 31.108190] dump_stack_lvl+0x91/0xf0 [ 31.108786] print_report+0xcc/0x620 [ 31.109529] ? __virt_addr_valid+0x102/0x340 [ 31.110267] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.111064] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.112006] kasan_report+0xbe/0xf0 [ 31.112672] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.113467] vma_interval_tree_remove+0xc75/0xec0 [ 31.114080] vma_prepare+0xc54/0x11a0 [ 31.114588] __split_vma+0x5af/0x950 [ 31.115130] ? __pfx___split_vma+0x10/0x10 [ 31.115696] ? find_held_lock+0x2c/0x110 [ 31.116192] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.116735] ? lock_is_held_type+0x9f/0x120 [ 31.117257] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.117832] ? mtree_range_walk+0x632/0x900 [ 31.118353] ? mas_walk+0x5c7/0x7c0 [ 31.118805] do_vmi_munmap+0x1f1/0x2b0 [ 31.119275] mmap_region+0x1f9/0x2660 [ 31.119730] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.120214] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.120935] ? __pfx_lock_acquire+0x10/0x10 [ 31.121501] ? __pfx_mmap_region+0x10/0x10 [ 31.122038] ? security_mmap_addr+0x7d/0xa0 [ 31.122583] ? get_unmapped_area+0x1f5/0x3f0 [ 31.123140] do_mmap+0x854/0xf00 [ 31.123588] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.124090] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.124659] ksys_mmap_pgoff+0x3af/0x500 [ 31.125180] do_syscall_64+0x3f/0x90 [ 31.125667] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.126324] RIP: 0033:0x7f8825333d82 [ 31.126792] 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 [ 31.128972] RSP: 002b:00007fff5abce8c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.129895] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8825333d82 [ 31.130763] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f882476d000 [ 31.131628] RBP: 00007f882476d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.132498] R10: 0000000000000812 R11: 0000000000000206 R12: 00005620b9b03d90 [ 31.133381] R13: 00007fff5abce8e0 R14: 00007fff5abce910 R15: 00007fff5abcec70 [ 31.134260] [ 31.134563] [ 31.134787] Allocated by task 213: [ 31.135230] kasan_save_stack+0x22/0x50 [ 31.135740] kasan_set_track+0x25/0x30 [ 31.136236] __kasan_slab_alloc+0x59/0x70 [ 31.136773] kmem_cache_alloc+0x16b/0x370 [ 31.137306] vm_area_dup+0x20/0x160 [ 31.137768] __split_vma+0x170/0x950 [ 31.138243] split_vma+0xc6/0x110 [ 31.138679] mprotect_fixup+0x8d2/0xb30 [ 31.139181] do_mprotect_pkey+0x87e/0xd40 [ 31.139712] __x64_sys_mprotect+0x78/0xc0 [ 31.140238] do_syscall_64+0x3f/0x90 [ 31.140714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.141384] [ 31.141609] Freed by task 213: [ 31.142076] kasan_save_stack+0x22/0x50 [ 31.142587] kasan_set_track+0x25/0x30 [ 31.143086] kasan_save_free_info+0x2b/0x50 [ 31.143632] __kasan_slab_free+0x10a/0x190 [ 31.144179] kmem_cache_free+0x10d/0x4d0 [ 31.144698] rcu_core+0x8c8/0x2860 [ 31.145161] __do_softirq+0x1b7/0x7d4 [ 31.145638] [ 31.145852] Last potentially related work creation: [ 31.146449] kasan_save_stack+0x22/0x50 [ 31.146961] __kasan_record_aux_stack+0x8e/0xa0 [ 31.147538] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.148191] remove_vma+0x139/0x170 [ 31.148652] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.149218] do_vmi_munmap+0x1f1/0x2b0 [ 31.149709] __vm_munmap+0x138/0x3a0 [ 31.150191] __x64_sys_munmap+0x59/0x80 [ 31.150690] do_syscall_64+0x3f/0x90 [ 31.151176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.151815] [ 31.152032] The buggy address belongs to the object at ffff88800fd54bc8 [ 31.152032] which belongs to the cache vm_area_struct of size 168 [ 31.153557] The buggy address is located 88 bytes inside of [ 31.153557] freed 168-byte region [ffff88800fd54bc8, ffff88800fd54c70) [ 31.154995] [ 31.155216] The buggy address belongs to the physical page: [ 31.155902] page:0000000050becdd7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd54 [ 31.157020] memcg:ffff88800fd55001 [ 31.157455] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.158166] page_type: 0xffffffff() [ 31.158631] raw: 0100000000000200 ffff8880087a0c80 ffffea000063e100 dead000000000003 [ 31.159568] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd55001 [ 31.160490] page dumped because: kasan: bad access detected [ 31.161180] [ 31.161401] Memory state around the buggy address: [ 31.161998] ffff88800fd54b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.162874] ffff88800fd54b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.163746] >ffff88800fd54c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.164622] ^ [ 31.165178] ffff88800fd54c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.166049] ffff88800fd54d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.166918] ================================================================== [ 31.167856] Disabling lock debugging due to kernel taint [ 33.165162] BUG: Bad rss-counter state mm:00000000ff18c6e7 type:MM_FILEPAGES val:33 [ 33.166332] BUG: Bad rss-counter state mm:00000000ff18c6e7 type:MM_ANONPAGES val:22 [ 33.562301] BUG: Bad rss-counter state mm:0000000038e36a1e type:MM_FILEPAGES val:33 [ 33.563821] BUG: Bad rss-counter state mm:0000000038e36a1e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25244' (ECDSA) to the list of known hosts. 2023/06/20 11:28:52 fuzzer started 2023/06/20 11:28:52 dialing manager at localhost:36067 2023/06/20 11:28:52 checking machine... 2023/06/20 11:28:52 checking revisions... [ 34.312992] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:28:52 testing simple program... [ 34.353208] cgroup: Unknown subsys name 'net' [ 34.391007] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:28:51 Registers: info registers vcpu 0 RAX=ffffffff8450ccc9 RBX=ffffffff8604ebe8 RCX=ffffffff8450cc7e RDX=0000000000000000 RSI=ffffffff864b2008 RDI=ffffffff8604ebc4 RBP=ffffffff8604ebe0 RSP=ffff888018c67748 R8 =ffffffff864b2008 R9 =ffff888018c67840 R10=0000000000038001 R11=00000000000b5080 R12=ffffffff8604ebe4 R13=ffffffff8604ebc4 R14=ffffffff8604ebdc R15=dffffc0000000000 RIP=ffffffff8112fc9f RFL=00000283 [--S---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 00007f171717b900 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=00007ffc03863000 CR3=000000000ed5a000 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=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 info registers vcpu 1 RAX=0000000000001007 RBX=000056528f3e0eb0 RCX=0000000000000010 RDX=0000000000000000 RSI=0000000000000023 RDI=000056528f3e0ea0 RBP=0000000000000002 RSP=00007ffc03868ff8 R8 =000056528f40de0a R9 =00007f171772dbe0 R10=0000000000000100 R11=0000000000000246 R12=000056528f3feed0 R13=00007ffc03869008 R14=00007f1717156b22 R15=00007f171717b710 RIP=00007f17176ce53f RFL=00000213 [----A-C] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f171717b900 00000000 00000000 GS =0000 0000000000000000 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=00007fb4dd0fb830 CR3=000000000ed5a000 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=23232323232323232323232323232323 XMM01=ffffffffffffff00ffff000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=73657909454d4f485f544c5541464544 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffff00ffffffffffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000