syzkaller login: [ 30.997222] BUG: Bad rss-counter state mm:0000000016a6b37a type:MM_FILEPAGES val:33 [ 30.998680] BUG: Bad rss-counter state mm:0000000016a6b37a type:MM_ANONPAGES val:22 [ 31.160293] ================================================================== [ 31.161368] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.162480] Read of size 8 at addr ffff888015ab14e0 by task sshd/219 [ 31.163581] [ 31.163846] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.164844] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.165828] Call Trace: [ 31.166148] [ 31.166433] dump_stack_lvl+0x91/0xf0 [ 31.166925] print_report+0xcc/0x620 [ 31.167414] ? __virt_addr_valid+0x102/0x340 [ 31.167979] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.168633] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.169263] kasan_report+0xbe/0xf0 [ 31.169743] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.170369] vma_interval_tree_remove+0xc75/0xec0 [ 31.170992] vma_prepare+0xc54/0x11a0 [ 31.171477] __split_vma+0x5af/0x950 [ 31.171959] ? __pfx___split_vma+0x10/0x10 [ 31.172501] ? find_held_lock+0x2c/0x110 [ 31.173041] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.173624] ? lock_is_held_type+0x9f/0x120 [ 31.174171] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.174797] ? mtree_range_walk+0x632/0x900 [ 31.175371] ? mas_walk+0x5c7/0x7c0 [ 31.175853] do_vmi_munmap+0x1f1/0x2b0 [ 31.176391] mmap_region+0x1f9/0x2660 [ 31.176881] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.177412] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.178139] ? __pfx_lock_acquire+0x10/0x10 [ 31.178681] ? __pfx_mmap_region+0x10/0x10 [ 31.179218] ? security_mmap_addr+0x7d/0xa0 [ 31.179757] ? get_unmapped_area+0x1f5/0x3f0 [ 31.180318] do_mmap+0x854/0xf00 [ 31.180761] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.181260] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.181819] ksys_mmap_pgoff+0x3af/0x500 [ 31.182332] do_syscall_64+0x3f/0x90 [ 31.182822] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.183475] RIP: 0033:0x7fd0e8476d82 [ 31.183931] 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 [ 31.186092] RSP: 002b:00007fff75cb4448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.187001] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd0e8476d82 [ 31.187848] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd0e78b0000 [ 31.188707] RBP: 00007fd0e78b0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.189547] R10: 0000000000000812 R11: 0000000000000206 R12: 000055df4dc85b20 [ 31.190390] R13: 00007fff75cb4460 R14: 00007fff75cb4490 R15: 00007fff75cb47f0 [ 31.191250] [ 31.191542] [ 31.191758] Allocated by task 212: [ 31.192192] kasan_save_stack+0x22/0x50 [ 31.192714] kasan_set_track+0x25/0x30 [ 31.193209] __kasan_slab_alloc+0x59/0x70 [ 31.193731] kmem_cache_alloc+0x16b/0x370 [ 31.194252] vm_area_dup+0x20/0x160 [ 31.194705] __split_vma+0x170/0x950 [ 31.195172] split_vma+0xc6/0x110 [ 31.195608] mprotect_fixup+0x8d2/0xb30 [ 31.196112] do_mprotect_pkey+0x87e/0xd40 [ 31.196642] __x64_sys_mprotect+0x78/0xc0 [ 31.197165] do_syscall_64+0x3f/0x90 [ 31.197641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.198278] [ 31.198494] Freed by task 202: [ 31.198885] kasan_save_stack+0x22/0x50 [ 31.199389] kasan_set_track+0x25/0x30 [ 31.199882] kasan_save_free_info+0x2b/0x50 [ 31.200433] __kasan_slab_free+0x10a/0x190 [ 31.200961] kmem_cache_free+0x10d/0x4d0 [ 31.201465] rcu_core+0x8c8/0x2860 [ 31.201915] __do_softirq+0x1b7/0x7d4 [ 31.202390] [ 31.202603] Last potentially related work creation: [ 31.203190] kasan_save_stack+0x22/0x50 [ 31.203692] __kasan_record_aux_stack+0x8e/0xa0 [ 31.204271] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.204960] remove_vma+0x139/0x170 [ 31.205419] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.205973] do_vmi_munmap+0x1f1/0x2b0 [ 31.206458] __vm_munmap+0x138/0x3a0 [ 31.206926] __x64_sys_munmap+0x59/0x80 [ 31.207422] do_syscall_64+0x3f/0x90 [ 31.207894] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.208557] [ 31.208777] The buggy address belongs to the object at ffff888015ab1488 [ 31.208777] which belongs to the cache vm_area_struct of size 168 [ 31.210239] The buggy address is located 88 bytes inside of [ 31.210239] freed 168-byte region [ffff888015ab1488, ffff888015ab1530) [ 31.211638] [ 31.211860] The buggy address belongs to the physical page: [ 31.212530] page:000000007ffb10d9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15ab1 [ 31.213621] memcg:ffff88800eca7501 [ 31.214044] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.214682] page_type: 0xffffffff() [ 31.215130] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.216038] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eca7501 [ 31.216952] page dumped because: kasan: bad access detected [ 31.217610] [ 31.217837] Memory state around the buggy address: [ 31.218423] ffff888015ab1380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.219273] ffff888015ab1400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.220126] >ffff888015ab1480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.220998] ^ [ 31.221744] ffff888015ab1500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.222602] ffff888015ab1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.223456] ================================================================== [ 31.224558] Disabling lock debugging due to kernel taint [ 33.261845] BUG: Bad rss-counter state mm:000000007f22b8b5 type:MM_FILEPAGES val:33 [ 33.263024] BUG: Bad rss-counter state mm:000000007f22b8b5 type:MM_ANONPAGES val:22 [ 33.657673] BUG: Bad rss-counter state mm:00000000b4dcb810 type:MM_FILEPAGES val:33 [ 33.658689] BUG: Bad rss-counter state mm:00000000b4dcb810 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13705' (ECDSA) to the list of known hosts. 2023/06/20 23:38:31 fuzzer started 2023/06/20 23:38:31 dialing manager at localhost:36067 2023/06/20 23:38:31 checking machine... 2023/06/20 23:38:31 checking revisions... [ 34.461021] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:38:31 testing simple program... [ 34.506685] cgroup: Unknown subsys name 'net' [ 34.550698] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:38:31 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8542a6c0 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff814c8467 RDI=ffffffff85652b60 RBP=ffffffff86607dd4 RSP=ffff88806ce09a10 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=ffffffff86607dd4 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800d4ec2e0 RIP=ffffffff8135bd59 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 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=00007f039f078288 CR3=000000000dadc000 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=2030333a38333a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a38333a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff856d84a0 RCX=ffffffff812e0135 RDX=ffffed1001fbff3d RSI=0000000000000004 RDI=ffff88800fdff9e8 RBP=1ffff11001fbff39 RSP=ffff88800fdff9c0 R8 =0000000000000001 R9 =ffffed1001fbff3d R10=0000000000000003 R11=00000000000b6a61 R12=ffffffff856d84a8 R13=ffffffff856d84b0 R14=ffff888018e81638 R15=ffff888018e815f0 RIP=ffffffff812e0139 RFL=00000097 [--S-APC] 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 00007f89cd6a3900 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=00007ffe5347a000 CR3=000000000edd0000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000