syzkaller login: [ 30.983971] BUG: Bad rss-counter state mm:000000003a9714a5 type:MM_FILEPAGES val:33 [ 30.985340] BUG: Bad rss-counter state mm:000000003a9714a5 type:MM_ANONPAGES val:22 [ 31.128138] ================================================================== [ 31.129154] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.130308] Read of size 8 at addr ffff88800db504e0 by task sshd/220 [ 31.131204] [ 31.131464] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.132444] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.133596] Call Trace: [ 31.133971] [ 31.134295] dump_stack_lvl+0x91/0xf0 [ 31.134861] print_report+0xcc/0x620 [ 31.135412] ? __virt_addr_valid+0x102/0x340 [ 31.136048] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.136761] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.137465] kasan_report+0xbe/0xf0 [ 31.138012] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.138725] vma_interval_tree_remove+0xc75/0xec0 [ 31.139415] vma_prepare+0xc54/0x11a0 [ 31.139965] __split_vma+0x5af/0x950 [ 31.140482] ? __pfx___split_vma+0x10/0x10 [ 31.141148] ? find_held_lock+0x2c/0x110 [ 31.141751] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.142369] ? lock_is_held_type+0x9f/0x120 [ 31.142968] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.143633] ? mtree_range_walk+0x632/0x900 [ 31.144242] ? mas_walk+0x5c7/0x7c0 [ 31.144768] do_vmi_munmap+0x1f1/0x2b0 [ 31.145324] mmap_region+0x1f9/0x2660 [ 31.145856] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.146420] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.147200] ? __pfx_lock_acquire+0x10/0x10 [ 31.147777] ? __pfx_mmap_region+0x10/0x10 [ 31.148353] ? security_mmap_addr+0x7d/0xa0 [ 31.148936] ? get_unmapped_area+0x1f5/0x3f0 [ 31.149555] do_mmap+0x854/0xf00 [ 31.150066] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.150606] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.151232] ksys_mmap_pgoff+0x3af/0x500 [ 31.151784] do_syscall_64+0x3f/0x90 [ 31.152306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.153028] RIP: 0033:0x7f23f782dd82 [ 31.153518] 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 [ 31.155812] RSP: 002b:00007ffd9b2a7058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.156786] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f23f782dd82 [ 31.157742] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f23f6c67000 [ 31.158663] RBP: 00007f23f6c67000 R08: 0000000000000009 R09: 0000000000001000 [ 31.159580] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561b07135d90 [ 31.160498] R13: 00007ffd9b2a7070 R14: 00007ffd9b2a70a0 R15: 00007ffd9b2a7400 [ 31.161446] [ 31.161762] [ 31.161997] Allocated by task 213: [ 31.162464] kasan_save_stack+0x22/0x50 [ 31.163011] kasan_set_track+0x25/0x30 [ 31.163545] __kasan_slab_alloc+0x59/0x70 [ 31.164108] kmem_cache_alloc+0x16b/0x370 [ 31.164662] vm_area_dup+0x20/0x160 [ 31.165161] __split_vma+0x170/0x950 [ 31.165662] split_vma+0xc6/0x110 [ 31.166134] mprotect_fixup+0x8d2/0xb30 [ 31.166679] do_mprotect_pkey+0x87e/0xd40 [ 31.167259] __x64_sys_mprotect+0x78/0xc0 [ 31.167841] do_syscall_64+0x3f/0x90 [ 31.168379] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.169105] [ 31.169346] Freed by task 0: [ 31.169768] kasan_save_stack+0x22/0x50 [ 31.170331] kasan_set_track+0x25/0x30 [ 31.170883] kasan_save_free_info+0x2b/0x50 [ 31.171475] __kasan_slab_free+0x10a/0x190 [ 31.172067] kmem_cache_free+0x10d/0x4d0 [ 31.172634] rcu_core+0x8c8/0x2860 [ 31.173147] __do_softirq+0x1b7/0x7d4 [ 31.173688] [ 31.173931] Last potentially related work creation: [ 31.174585] kasan_save_stack+0x22/0x50 [ 31.175143] __kasan_record_aux_stack+0x8e/0xa0 [ 31.175786] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.176500] remove_vma+0x139/0x170 [ 31.177013] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.177632] do_vmi_munmap+0x1f1/0x2b0 [ 31.178173] __vm_munmap+0x138/0x3a0 [ 31.178695] __x64_sys_munmap+0x59/0x80 [ 31.179245] do_syscall_64+0x3f/0x90 [ 31.179774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.180493] [ 31.180738] The buggy address belongs to the object at ffff88800db50488 [ 31.180738] which belongs to the cache vm_area_struct of size 168 [ 31.182353] The buggy address is located 88 bytes inside of [ 31.182353] freed 168-byte region [ffff88800db50488, ffff88800db50530) [ 31.183910] [ 31.184146] The buggy address belongs to the physical page: [ 31.184882] page:00000000604a676c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb50 [ 31.186080] memcg:ffff88800fc00b01 [ 31.186549] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.187260] page_type: 0xffffffff() [ 31.187764] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.188777] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc00b01 [ 31.189783] page dumped because: kasan: bad access detected [ 31.190519] [ 31.190760] Memory state around the buggy address: [ 31.191401] ffff88800db50380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.192352] ffff88800db50400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.193315] >ffff88800db50480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.194247] ^ [ 31.195073] ffff88800db50500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.196014] ffff88800db50580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.196957] ================================================================== [ 31.198187] Disabling lock debugging due to kernel taint [ 32.688640] BUG: Bad rss-counter state mm:0000000085e1a55e type:MM_FILEPAGES val:33 [ 32.689657] BUG: Bad rss-counter state mm:0000000085e1a55e type:MM_ANONPAGES val:22 [ 33.195351] BUG: Bad rss-counter state mm:0000000039d450e2 type:MM_FILEPAGES val:33 [ 33.196536] BUG: Bad rss-counter state mm:0000000039d450e2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61274' (ECDSA) to the list of known hosts. 2023/06/20 14:20:53 fuzzer started 2023/06/20 14:20:53 dialing manager at localhost:36067 2023/06/20 14:20:53 checking machine... 2023/06/20 14:20:53 checking revisions... [ 33.825744] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:20:53 testing simple program... [ 33.881078] cgroup: Unknown subsys name 'net' [ 33.930993] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:20:53 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8450cc59 RDX=00000000000350cc RSI=00000000000350cc RDI=ffffffff865bdd20 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010454 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8113077a RFL=00000212 [----A--] 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 00007faf18344900 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=00007faf177ac0e0 CR3=0000000009a7e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=ddd9fa4c4a511a3900000000000ae988 XMM05=c1fc557d6f8444c30000000000132c80 XMM06=4fda316b135da52b0000000000131a70 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864b6d1e RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888008e37988 RSP=ffff888008e378c0 R8 =ffffffff864b6d22 R9 =ffff888008e37970 R10=0000000000038001 R11=00000000000b5d59 R12=ffff888008e37990 R13=ffff888008e37978 R14=ffff888008e37ec8 R15=ffff888008e37930 RIP=ffffffff81131153 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 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=00007ffce57f3000 CR3=000000000e4a4000 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