syzkaller login: [ 23.698690] BUG: Bad rss-counter state mm:000000000dd22f78 type:MM_FILEPAGES val:31 [ 23.699731] BUG: Bad rss-counter state mm:000000000dd22f78 type:MM_ANONPAGES val:22 [ 23.864861] ================================================================== [ 23.865764] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.866696] Read of size 8 at addr ffff88800e8494e0 by task sshd/219 [ 23.867467] [ 23.867682] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.868687] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.869682] Call Trace: [ 23.870001] [ 23.870288] dump_stack_lvl+0x91/0xf0 [ 23.870775] print_report+0xcc/0x620 [ 23.871253] ? __virt_addr_valid+0x102/0x340 [ 23.871803] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.872411] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.873044] kasan_report+0xbe/0xf0 [ 23.873516] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.874128] vma_interval_tree_remove+0xc75/0xec0 [ 23.874727] vma_prepare+0xc54/0x11a0 [ 23.875206] __split_vma+0x5af/0x950 [ 23.875675] ? __pfx___split_vma+0x10/0x10 [ 23.876198] ? find_held_lock+0x2c/0x110 [ 23.876717] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.877284] ? lock_is_held_type+0x9f/0x120 [ 23.877823] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.878420] ? mtree_range_walk+0x632/0x900 [ 23.878974] ? mas_walk+0x5c7/0x7c0 [ 23.879449] do_vmi_munmap+0x1f1/0x2b0 [ 23.879955] mmap_region+0x1f9/0x2660 [ 23.880442] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.880976] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.881681] ? __pfx_lock_acquire+0x10/0x10 [ 23.882235] ? __pfx_mmap_region+0x10/0x10 [ 23.882780] ? security_mmap_addr+0x7d/0xa0 [ 23.883322] ? get_unmapped_area+0x1f5/0x3f0 [ 23.883888] do_mmap+0x854/0xf00 [ 23.884335] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.884853] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.885431] ksys_mmap_pgoff+0x3af/0x500 [ 23.885949] do_syscall_64+0x3f/0x90 [ 23.886434] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.887101] RIP: 0033:0x7f1306b53d82 [ 23.887567] 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 [ 23.889776] RSP: 002b:00007ffe6e3fb718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.890704] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1306b53d82 [ 23.891570] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1305f8d000 [ 23.892434] RBP: 00007f1305f8d000 R08: 0000000000000009 R09: 0000000000001000 [ 23.893306] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cb183b2f70 [ 23.894194] R13: 00007ffe6e3fb730 R14: 00007ffe6e3fb760 R15: 00007ffe6e3fbac0 [ 23.895066] [ 23.895364] [ 23.895580] Allocated by task 212: [ 23.896020] kasan_save_stack+0x22/0x50 [ 23.896531] kasan_set_track+0x25/0x30 [ 23.897059] __kasan_slab_alloc+0x59/0x70 [ 23.897610] kmem_cache_alloc+0x16b/0x370 [ 23.898148] vm_area_dup+0x20/0x160 [ 23.898621] __split_vma+0x170/0x950 [ 23.899111] split_vma+0xc6/0x110 [ 23.899575] mprotect_fixup+0x8d2/0xb30 [ 23.900115] do_mprotect_pkey+0x87e/0xd40 [ 23.900652] __x64_sys_mprotect+0x78/0xc0 [ 23.901199] do_syscall_64+0x3f/0x90 [ 23.901691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.902354] [ 23.902575] Freed by task 212: [ 23.902984] kasan_save_stack+0x22/0x50 [ 23.903504] kasan_set_track+0x25/0x30 [ 23.904017] kasan_save_free_info+0x2b/0x50 [ 23.904578] __kasan_slab_free+0x10a/0x190 [ 23.905143] kmem_cache_free+0x10d/0x4d0 [ 23.905673] rcu_core+0x8c8/0x2860 [ 23.906141] __do_softirq+0x1b7/0x7d4 [ 23.906638] [ 23.906862] Last potentially related work creation: [ 23.907467] kasan_save_stack+0x22/0x50 [ 23.907984] __kasan_record_aux_stack+0x8e/0xa0 [ 23.908576] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.909263] remove_vma+0x139/0x170 [ 23.909726] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.910301] do_vmi_munmap+0x1f1/0x2b0 [ 23.910801] __vm_munmap+0x138/0x3a0 [ 23.911282] __x64_sys_munmap+0x59/0x80 [ 23.911799] do_syscall_64+0x3f/0x90 [ 23.912293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.912963] [ 23.913183] Second to last potentially related work creation: [ 23.913896] kasan_save_stack+0x22/0x50 [ 23.914412] __kasan_record_aux_stack+0x8e/0xa0 [ 23.915003] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.915655] remove_vma+0x139/0x170 [ 23.916120] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.916690] do_vmi_munmap+0x1f1/0x2b0 [ 23.917206] mmap_region+0x1f9/0x2660 [ 23.917700] do_mmap+0x854/0xf00 [ 23.918139] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.918642] ksys_mmap_pgoff+0x3af/0x500 [ 23.919151] do_syscall_64+0x3f/0x90 [ 23.919640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.920313] [ 23.920534] The buggy address belongs to the object at ffff88800e849488 [ 23.920534] which belongs to the cache vm_area_struct of size 168 [ 23.922055] The buggy address is located 88 bytes inside of [ 23.922055] freed 168-byte region [ffff88800e849488, ffff88800e849530) [ 23.923477] [ 23.923691] The buggy address belongs to the physical page: [ 23.924344] page:000000003e7ed117 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe849 [ 23.925438] memcg:ffff88800e9a1301 [ 23.925860] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.926502] page_type: 0xffffffff() [ 23.926960] raw: 0100000000000200 ffff8880087a0c80 ffffea00002fbb40 dead000000000002 [ 23.927878] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9a1301 [ 23.928776] page dumped because: kasan: bad access detected [ 23.929449] [ 23.929662] Memory state around the buggy address: [ 23.930244] ffff88800e849380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.931088] ffff88800e849400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 23.931935] >ffff88800e849480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.932798] ^ [ 23.933549] ffff88800e849500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 23.934420] ffff88800e849580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.935300] ================================================================== [ 23.936455] Disabling lock debugging due to kernel taint [ 26.259331] BUG: Bad rss-counter state mm:0000000028d189ca type:MM_FILEPAGES val:33 [ 26.260314] BUG: Bad rss-counter state mm:0000000028d189ca type:MM_ANONPAGES val:22 [ 26.710970] BUG: Bad rss-counter state mm:00000000bded6bfc type:MM_FILEPAGES val:33 [ 26.712125] BUG: Bad rss-counter state mm:00000000bded6bfc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8148' (ECDSA) to the list of known hosts. 2023/06/20 22:22:27 fuzzer started 2023/06/20 22:22:27 dialing manager at localhost:36067 2023/06/20 22:22:27 checking machine... 2023/06/20 22:22:27 checking revisions... [ 27.499388] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:22:27 testing simple program... [ 27.553243] cgroup: Unknown subsys name 'net' [ 27.595273] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:22:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81b3c3c3 RDX=ffff8880177a1b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff8880161a8780 RSP=ffff88800e4ff7a0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff8880161f63c8 R14=ffff888018a7b438 R15=ffff88800e4ff8d0 RIP=ffffffff814c0860 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 00007fb785666700 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=00007f42163b60b0 CR3=000000000e450000 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=2037323a32323a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a32323a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f4d52af6d90 CR3=000000000c4f6000 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=d1250f750fe96584f649e32914b4addd XMM02=0000000000120200eff9b2d0a8fce9cb XMM03=00000000001202d02c67c8bc2e329bc3 XMM04=040e0d084d60eaf700000000000ae988 XMM05=786dd5fac89d6cfb0000000000134c70 XMM06=806171799158d96700000000001339a0 XMM07=e042d86d42eb936e0000000000122bb8 XMM08=b022baa79ba7166700000000001202d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000