syzkaller login: [ 74.552586] BUG: Bad rss-counter state mm:00000000ad8856d3 type:MM_FILEPAGES val:33 [ 74.553610] BUG: Bad rss-counter state mm:00000000ad8856d3 type:MM_ANONPAGES val:22 [ 74.719771] ================================================================== [ 74.720857] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 74.721996] Read of size 8 at addr ffff888016a954e0 by task sshd/226 [ 74.722889] [ 74.723105] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 74.723971] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 74.724961] Call Trace: [ 74.725285] [ 74.725678] dump_stack_lvl+0x91/0xf0 [ 74.726294] print_report+0xcc/0x620 [ 74.726892] ? __virt_addr_valid+0x102/0x340 [ 74.727572] ? vma_interval_tree_remove+0xc75/0xec0 [ 74.728294] ? vma_interval_tree_remove+0xc75/0xec0 [ 74.728980] kasan_report+0xbe/0xf0 [ 74.729458] ? vma_interval_tree_remove+0xc75/0xec0 [ 74.730094] vma_interval_tree_remove+0xc75/0xec0 [ 74.730700] vma_prepare+0xc54/0x11a0 [ 74.731182] __split_vma+0x5af/0x950 [ 74.731652] ? __pfx___split_vma+0x10/0x10 [ 74.732181] ? find_held_lock+0x2c/0x110 [ 74.732701] do_vmi_align_munmap+0x2ba/0x11f0 [ 74.733269] ? lock_is_held_type+0x9f/0x120 [ 74.733831] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 74.734440] ? mtree_range_walk+0x632/0x900 [ 74.734991] ? mas_walk+0x5c7/0x7c0 [ 74.735465] do_vmi_munmap+0x1f1/0x2b0 [ 74.735963] mmap_region+0x1f9/0x2660 [ 74.736449] ? vm_mmap_pgoff+0x15c/0x3a0 [ 74.736962] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 74.737694] ? __pfx_lock_acquire+0x10/0x10 [ 74.738235] ? __pfx_mmap_region+0x10/0x10 [ 74.738764] ? security_mmap_addr+0x7d/0xa0 [ 74.739305] ? get_unmapped_area+0x1f5/0x3f0 [ 74.739850] do_mmap+0x854/0xf00 [ 74.740289] vm_mmap_pgoff+0x1a6/0x3a0 [ 74.740786] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 74.741352] ksys_mmap_pgoff+0x3af/0x500 [ 74.741870] do_syscall_64+0x3f/0x90 [ 74.742343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 74.742997] RIP: 0033:0x7fbce4a1ad82 [ 74.743454] 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 [ 74.745607] RSP: 002b:00007ffed4cd6458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 74.746516] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbce4a1ad82 [ 74.747365] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbce3e54000 [ 74.748222] RBP: 00007fbce3e54000 R08: 0000000000000009 R09: 0000000000001000 [ 74.749069] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560d6c62cec0 [ 74.749927] R13: 00007ffed4cd6470 R14: 00007ffed4cd64a0 R15: 00007ffed4cd6800 [ 74.750782] [ 74.751076] [ 74.751289] Allocated by task 219: [ 74.751719] kasan_save_stack+0x22/0x50 [ 74.752226] kasan_set_track+0x25/0x30 [ 74.752723] __kasan_slab_alloc+0x59/0x70 [ 74.753253] kmem_cache_alloc+0x16b/0x370 [ 74.753789] vm_area_dup+0x20/0x160 [ 74.754249] __split_vma+0x170/0x950 [ 74.754717] split_vma+0xc6/0x110 [ 74.755159] mprotect_fixup+0x8d2/0xb30 [ 74.755665] do_mprotect_pkey+0x87e/0xd40 [ 74.756193] __x64_sys_mprotect+0x78/0xc0 [ 74.756722] do_syscall_64+0x3f/0x90 [ 74.757203] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 74.758005] [ 74.758234] Freed by task 13: [ 74.758620] kasan_save_stack+0x22/0x50 [ 74.759127] kasan_set_track+0x25/0x30 [ 74.759619] kasan_save_free_info+0x2b/0x50 [ 74.760154] __kasan_slab_free+0x10a/0x190 [ 74.760690] kmem_cache_free+0x10d/0x4d0 [ 74.761206] rcu_core+0x8c8/0x2860 [ 74.761670] __do_softirq+0x1b7/0x7d4 [ 74.762152] [ 74.762367] Last potentially related work creation: [ 74.762952] kasan_save_stack+0x22/0x50 [ 74.763459] __kasan_record_aux_stack+0x8e/0xa0 [ 74.764036] __call_rcu_common.constprop.0+0x6a/0xb90 [ 74.764685] remove_vma+0x139/0x170 [ 74.765136] do_vmi_align_munmap+0xd4a/0x11f0 [ 74.765702] do_vmi_munmap+0x1f1/0x2b0 [ 74.766195] __vm_munmap+0x138/0x3a0 [ 74.766662] __x64_sys_munmap+0x59/0x80 [ 74.767165] do_syscall_64+0x3f/0x90 [ 74.767639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 74.768286] [ 74.768498] The buggy address belongs to the object at ffff888016a95488 [ 74.768498] which belongs to the cache vm_area_struct of size 168 [ 74.769994] The buggy address is located 88 bytes inside of [ 74.769994] freed 168-byte region [ffff888016a95488, ffff888016a95530) [ 74.771414] [ 74.771632] The buggy address belongs to the physical page: [ 74.772296] page:000000003a278074 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a95 [ 74.773394] memcg:ffff88800c61b201 [ 74.773842] flags: 0x100000000000200(slab|node=0|zone=1) [ 74.774497] page_type: 0xffffffff() [ 74.774950] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 74.775869] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c61b201 [ 74.776775] page dumped because: kasan: bad access detected [ 74.777440] [ 74.777662] Memory state around the buggy address: [ 74.778244] ffff888016a95380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 74.779105] ffff888016a95400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 74.779959] >ffff888016a95480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 74.780811] ^ [ 74.781586] ffff888016a95500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 74.782445] ffff888016a95580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 74.783297] ================================================================== [ 74.784272] Disabling lock debugging due to kernel taint [ 77.066853] BUG: Bad rss-counter state mm:000000001bd3d8bd type:MM_FILEPAGES val:33 [ 77.067930] BUG: Bad rss-counter state mm:000000001bd3d8bd type:MM_ANONPAGES val:22 [ 77.627361] BUG: Bad rss-counter state mm:000000009839d2c2 type:MM_FILEPAGES val:33 [ 77.628544] BUG: Bad rss-counter state mm:000000009839d2c2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40417' (ECDSA) to the list of known hosts. 2023/06/20 03:54:55 fuzzer started 2023/06/20 03:54:55 dialing manager at localhost:44161 2023/06/20 03:54:55 checking machine... 2023/06/20 03:54:55 checking revisions... [ 78.290285] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:54:55 testing simple program... [ 78.343729] cgroup: Unknown subsys name 'net' [ 78.389770] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:54:40 Registers: info registers vcpu 0 RAX=ffff8880145f8001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880145f7701 RSI=ffff8880145f77e0 RDI=ffff88806ce09a88 RBP=ffff88806ce09ad0 RSP=ffff88806ce099f0 R8 =ffffffff8611b240 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=000000000001c263 R12=ffff88806ce09ad8 R13=ffff8880145f0000 R14=ffff8880145f77e8 R15=ffff88806ce09a78 RIP=ffffffff811304d1 RFL=00000286 [--S--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 00007f92ac5f9900 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=00007f92ab9f54d0 CR3=000000000ca54000 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=00000000000000000000000000000000 XMM01=9c2d617ca2ed1c9ce34c8713b4b029b2 XMM02=000000000011e0e0eff9b2d0a8fce9cb XMM03=000000000011e1b02c67c8bc2e329bc3 XMM04=ad419a2a2802b6de00000000000ae988 XMM05=9024a1ca4a0e1a3f00000000001351c8 XMM06=13e856d8d71426c80000000000133ef8 XMM07=fb795ef6d65770560000000000124730 XMM08=2c67c8bc2e329bc3000000000011e150 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000006000000 RBX=000056132270c0c0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000023 RDI=000056132270c0c0 RBP=000000000000001a RSP=00007ffdbfbc71b8 R8 =000056132271081a R9 =00007f1b0358ebe0 R10=0000000000000100 R11=0000000000000246 R12=0000561322701d00 R13=00007ffdbfbc71c8 R14=00007f1b02fb7b22 R15=00007f1b02fdc710 RIP=00007f1b0352f500 RFL=00000206 [-----P-] 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 00007f1b02fdc900 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=00007ffdbfbc1000 CR3=000000000f40a000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=61726f706d6574206120736920736968 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=20202020202020205249445f4c49414d XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000