syzkaller login: [ 31.985295] BUG: Bad rss-counter state mm:000000000effb34f type:MM_FILEPAGES val:33 [ 31.986009] BUG: Bad rss-counter state mm:000000000effb34f type:MM_ANONPAGES val:22 [ 32.129773] ================================================================== [ 32.130681] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.131550] Read of size 8 at addr ffff88800e8de3f8 by task sshd/220 [ 32.132266] [ 32.132565] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.133370] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.134290] Call Trace: [ 32.134603] [ 32.134877] dump_stack_lvl+0x91/0xf0 [ 32.135340] print_report+0xcc/0x620 [ 32.135794] ? __virt_addr_valid+0x102/0x340 [ 32.136320] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.136898] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.137481] kasan_report+0xbe/0xf0 [ 32.137942] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.138544] vma_interval_tree_remove+0xc75/0xec0 [ 32.139147] vma_prepare+0xc54/0x11a0 [ 32.139633] __split_vma+0x5af/0x950 [ 32.140108] ? __pfx___split_vma+0x10/0x10 [ 32.140630] ? find_held_lock+0x2c/0x110 [ 32.141143] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.141715] ? lock_is_held_type+0x9f/0x120 [ 32.142260] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.142872] ? mtree_range_walk+0x632/0x900 [ 32.143422] ? mas_walk+0x5c7/0x7c0 [ 32.143890] do_vmi_munmap+0x1f1/0x2b0 [ 32.144381] mmap_region+0x1f9/0x2660 [ 32.144868] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.145373] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.146098] ? __pfx_lock_acquire+0x10/0x10 [ 32.146622] ? __pfx_mmap_region+0x10/0x10 [ 32.147158] ? security_mmap_addr+0x7d/0xa0 [ 32.147692] ? get_unmapped_area+0x1f5/0x3f0 [ 32.148247] do_mmap+0x854/0xf00 [ 32.148681] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.149170] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.149757] ksys_mmap_pgoff+0x3af/0x500 [ 32.150266] do_syscall_64+0x3f/0x90 [ 32.150753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.151388] RIP: 0033:0x7f6e211fcd82 [ 32.151835] 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 [ 32.153968] RSP: 002b:00007ffe2d62ed78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.154882] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e211fcd82 [ 32.155735] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e20636000 [ 32.156580] RBP: 00007f6e20636000 R08: 0000000000000009 R09: 0000000000001000 [ 32.157426] R10: 0000000000000812 R11: 0000000000000206 R12: 000055786eff7f70 [ 32.158271] R13: 00007ffe2d62ed90 R14: 00007ffe2d62edc0 R15: 00007ffe2d62f120 [ 32.159131] [ 32.159418] [ 32.159633] Allocated by task 213: [ 32.160062] kasan_save_stack+0x22/0x50 [ 32.160558] kasan_set_track+0x25/0x30 [ 32.161047] __kasan_slab_alloc+0x59/0x70 [ 32.161592] kmem_cache_alloc+0x16b/0x370 [ 32.162112] vm_area_dup+0x20/0x160 [ 32.162570] __split_vma+0x170/0x950 [ 32.163039] split_vma+0xc6/0x110 [ 32.163482] mprotect_fixup+0x8d2/0xb30 [ 32.163979] do_mprotect_pkey+0x87e/0xd40 [ 32.164492] __x64_sys_mprotect+0x78/0xc0 [ 32.165017] do_syscall_64+0x3f/0x90 [ 32.165483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.166135] [ 32.166345] Freed by task 213: [ 32.166727] kasan_save_stack+0x22/0x50 [ 32.167235] kasan_set_track+0x25/0x30 [ 32.167725] kasan_save_free_info+0x2b/0x50 [ 32.168252] __kasan_slab_free+0x10a/0x190 [ 32.168788] kmem_cache_free+0x10d/0x4d0 [ 32.169290] rcu_core+0x8c8/0x2860 [ 32.169747] __do_softirq+0x1b7/0x7d4 [ 32.170225] [ 32.170441] Last potentially related work creation: [ 32.171025] kasan_save_stack+0x22/0x50 [ 32.171527] __kasan_record_aux_stack+0x8e/0xa0 [ 32.172106] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.172753] remove_vma+0x139/0x170 [ 32.173202] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.173770] do_vmi_munmap+0x1f1/0x2b0 [ 32.174256] __vm_munmap+0x138/0x3a0 [ 32.174718] __x64_sys_munmap+0x59/0x80 [ 32.175214] do_syscall_64+0x3f/0x90 [ 32.175692] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.176328] [ 32.176543] The buggy address belongs to the object at ffff88800e8de3a0 [ 32.176543] which belongs to the cache vm_area_struct of size 168 [ 32.178047] The buggy address is located 88 bytes inside of [ 32.178047] freed 168-byte region [ffff88800e8de3a0, ffff88800e8de448) [ 32.179446] [ 32.179662] The buggy address belongs to the physical page: [ 32.180319] page:00000000ebbc70f1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe8de [ 32.181401] memcg:ffff8880168cc801 [ 32.181835] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.182486] page_type: 0xffffffff() [ 32.182938] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.183857] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168cc801 [ 32.184756] page dumped because: kasan: bad access detected [ 32.185419] [ 32.185639] Memory state around the buggy address: [ 32.186222] ffff88800e8de280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.187082] ffff88800e8de300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.187931] >ffff88800e8de380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.188784] ^ [ 32.189640] ffff88800e8de400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.190499] ffff88800e8de480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.191350] ================================================================== [ 32.192318] Disabling lock debugging due to kernel taint [ 34.003772] BUG: Bad rss-counter state mm:00000000f8b3d7ad type:MM_FILEPAGES val:33 [ 34.004836] BUG: Bad rss-counter state mm:00000000f8b3d7ad type:MM_ANONPAGES val:22 [ 34.420269] BUG: Bad rss-counter state mm:00000000a4e21b65 type:MM_FILEPAGES val:33 [ 34.421081] BUG: Bad rss-counter state mm:00000000a4e21b65 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46173' (ECDSA) to the list of known hosts. 2023/06/19 11:02:30 fuzzer started 2023/06/19 11:02:30 dialing manager at localhost:44161 2023/06/19 11:02:30 checking machine... 2023/06/19 11:02:30 checking revisions... [ 35.041178] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:02:31 testing simple program... [ 35.087369] cgroup: Unknown subsys name 'net' [ 35.143539] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:02:29 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fbe5e490650 CR3=0000000016fa8000 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=2030333a32303a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a32303a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000007 RCX=0000000000000000 RDX=ffff8880165fd1c0 RSI=ffffffff8113b05c RDI=0000000000000005 RBP=ffff88801653dae0 RSP=ffff88800fedfe90 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000002 R13=0000000000100073 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff814c0800 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fea57775900 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=00005619ae099b88 CR3=000000000f272000 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=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