syzkaller login: [ 35.988575] BUG: Bad rss-counter state mm:00000000f71cbcda type:MM_FILEPAGES val:33 [ 35.989955] BUG: Bad rss-counter state mm:00000000f71cbcda type:MM_ANONPAGES val:22 [ 36.132202] ================================================================== [ 36.133285] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.134428] Read of size 8 at addr ffff888015db7968 by task sshd/219 [ 36.135463] [ 36.135684] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.136549] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.137539] Call Trace: [ 36.137862] [ 36.138169] dump_stack_lvl+0x91/0xf0 [ 36.138671] print_report+0xcc/0x620 [ 36.139156] ? __virt_addr_valid+0x102/0x340 [ 36.139705] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.140328] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.140943] kasan_report+0xbe/0xf0 [ 36.141425] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.142051] vma_interval_tree_remove+0xc75/0xec0 [ 36.142683] vma_prepare+0xc54/0x11a0 [ 36.143170] __split_vma+0x5af/0x950 [ 36.143647] ? __pfx___split_vma+0x10/0x10 [ 36.144182] ? find_held_lock+0x2c/0x110 [ 36.144706] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.145277] ? lock_is_held_type+0x9f/0x120 [ 36.145826] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.146448] ? mtree_range_walk+0x632/0x900 [ 36.147008] ? mas_walk+0x5c7/0x7c0 [ 36.147495] do_vmi_munmap+0x1f1/0x2b0 [ 36.147995] mmap_region+0x1f9/0x2660 [ 36.148480] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.149003] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.149725] ? __pfx_lock_acquire+0x10/0x10 [ 36.150276] ? __pfx_mmap_region+0x10/0x10 [ 36.150813] ? security_mmap_addr+0x7d/0xa0 [ 36.151353] ? get_unmapped_area+0x1f5/0x3f0 [ 36.151908] do_mmap+0x854/0xf00 [ 36.152356] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.152854] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.153419] ksys_mmap_pgoff+0x3af/0x500 [ 36.153933] do_syscall_64+0x3f/0x90 [ 36.154440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.155094] RIP: 0033:0x7fbc11047d82 [ 36.155556] 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 [ 36.157712] RSP: 002b:00007fff548071d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.158633] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbc11047d82 [ 36.159497] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbc10481000 [ 36.160356] RBP: 00007fbc10481000 R08: 0000000000000009 R09: 0000000000001000 [ 36.161215] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556ae4162f70 [ 36.162074] R13: 00007fff548071f0 R14: 00007fff54807220 R15: 00007fff54807580 [ 36.162970] [ 36.163273] [ 36.163488] Allocated by task 212: [ 36.163921] kasan_save_stack+0x22/0x50 [ 36.164429] kasan_set_track+0x25/0x30 [ 36.164933] __kasan_slab_alloc+0x59/0x70 [ 36.165459] kmem_cache_alloc+0x16b/0x370 [ 36.165983] vm_area_dup+0x20/0x160 [ 36.166448] __split_vma+0x170/0x950 [ 36.166914] split_vma+0xc6/0x110 [ 36.167355] mprotect_fixup+0x8d2/0xb30 [ 36.167865] do_mprotect_pkey+0x87e/0xd40 [ 36.168389] __x64_sys_mprotect+0x78/0xc0 [ 36.168920] do_syscall_64+0x3f/0x90 [ 36.169400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.170052] [ 36.170276] Freed by task 212: [ 36.170675] kasan_save_stack+0x22/0x50 [ 36.171185] kasan_set_track+0x25/0x30 [ 36.171685] kasan_save_free_info+0x2b/0x50 [ 36.172224] __kasan_slab_free+0x10a/0x190 [ 36.172765] kmem_cache_free+0x10d/0x4d0 [ 36.173279] rcu_core+0x8c8/0x2860 [ 36.173725] __do_softirq+0x1b7/0x7d4 [ 36.174219] [ 36.174434] Last potentially related work creation: [ 36.175029] kasan_save_stack+0x22/0x50 [ 36.175534] __kasan_record_aux_stack+0x8e/0xa0 [ 36.176115] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.176799] remove_vma+0x139/0x170 [ 36.177256] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.177826] do_vmi_munmap+0x1f1/0x2b0 [ 36.178328] __vm_munmap+0x138/0x3a0 [ 36.178802] __x64_sys_munmap+0x59/0x80 [ 36.179305] do_syscall_64+0x3f/0x90 [ 36.179788] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.180437] [ 36.180656] The buggy address belongs to the object at ffff888015db7910 [ 36.180656] which belongs to the cache vm_area_struct of size 168 [ 36.182155] The buggy address is located 88 bytes inside of [ 36.182155] freed 168-byte region [ffff888015db7910, ffff888015db79b8) [ 36.183579] [ 36.183799] The buggy address belongs to the physical page: [ 36.184471] page:000000001b116966 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15db7 [ 36.185564] memcg:ffff888009610601 [ 36.185992] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.186658] page_type: 0xffffffff() [ 36.187118] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 36.188052] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009610601 [ 36.188972] page dumped because: kasan: bad access detected [ 36.189639] [ 36.189856] Memory state around the buggy address: [ 36.190463] ffff888015db7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 36.191330] ffff888015db7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 36.192195] >ffff888015db7900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.193056] ^ [ 36.193847] ffff888015db7980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 36.194726] ffff888015db7a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.195585] ================================================================== [ 36.196525] Disabling lock debugging due to kernel taint [ 38.966461] BUG: Bad rss-counter state mm:00000000e03897aa type:MM_FILEPAGES val:33 [ 38.967712] BUG: Bad rss-counter state mm:00000000e03897aa type:MM_ANONPAGES val:22 [ 39.550001] BUG: Bad rss-counter state mm:00000000fb0319c1 type:MM_FILEPAGES val:33 [ 39.551098] BUG: Bad rss-counter state mm:00000000fb0319c1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30063' (ECDSA) to the list of known hosts. 2023/06/21 05:26:10 fuzzer started 2023/06/21 05:26:11 dialing manager at localhost:36067 2023/06/21 05:26:11 checking machine... 2023/06/21 05:26:11 checking revisions... [ 40.208628] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:26:11 testing simple program... [ 40.255309] cgroup: Unknown subsys name 'net' [ 40.301434] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:26:10 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888008d9f978 RCX=ffffffff86138eb0 RDX=1ffff110011b3f2f RSI=ffff888008d9fcd0 RDI=ffff888008d9f978 RBP=ffff888008d9fcd0 RSP=ffff888008d9f8d0 R8 =ffffffff86138eb4 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000020d9c R12=0000000000000008 R13=ffff888008d9f9c0 R14=ffff888008d9fcd8 R15=ffff888008d9f978 RIP=ffffffff8113041a RFL=00000282 [--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 =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=00007ffc48838bd8 CR3=000000000f216000 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=2030313a36323a3530203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a36323a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=00000000000293c0 RCX=0000000000010000 RDX=1ffff110031210c3 RSI=00000000000f4240 RDI=ffff888018908618 RBP=ffff888018908000 RSP=ffff88806cf09620 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000001ad1d676b0 R12=00000000000f4240 R13=0000000000000003 R14=ffff88806cf09888 R15=dffffc0000000000 RIP=ffffffff812993c1 RFL=00000046 [---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 00007f340c065900 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=00007f340c61d0b0 CR3=000000001cade000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000