syzkaller login: [ 38.808679] BUG: Bad rss-counter state mm:00000000a0ee725d type:MM_FILEPAGES val:33 [ 38.809429] BUG: Bad rss-counter state mm:00000000a0ee725d type:MM_ANONPAGES val:22 [ 38.935343] ================================================================== [ 38.936020] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.936656] Read of size 8 at addr ffff88800fc13310 by task sshd/220 [ 38.937223] [ 38.937375] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.937956] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.938622] Call Trace: [ 38.938838] [ 38.939028] dump_stack_lvl+0x91/0xf0 [ 38.939360] print_report+0xcc/0x620 [ 38.939996] ? __virt_addr_valid+0x102/0x340 [ 38.940398] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.940831] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.941316] kasan_report+0xbe/0xf0 [ 38.941646] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.942061] vma_interval_tree_remove+0xc75/0xec0 [ 38.942454] vma_prepare+0xc54/0x11a0 [ 38.942777] __split_vma+0x5af/0x950 [ 38.943095] ? __pfx___split_vma+0x10/0x10 [ 38.943475] ? find_held_lock+0x2c/0x110 [ 38.943842] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.944242] ? lock_is_held_type+0x9f/0x120 [ 38.944615] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.945081] ? mtree_range_walk+0x632/0x900 [ 38.945503] ? mas_walk+0x5c7/0x7c0 [ 38.945839] do_vmi_munmap+0x1f1/0x2b0 [ 38.946192] mmap_region+0x1f9/0x2660 [ 38.946557] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.946911] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.947421] ? __pfx_lock_acquire+0x10/0x10 [ 38.947813] ? __pfx_mmap_region+0x10/0x10 [ 38.948190] ? security_mmap_addr+0x7d/0xa0 [ 38.948570] ? get_unmapped_area+0x1f5/0x3f0 [ 38.948984] do_mmap+0x854/0xf00 [ 38.949304] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.949645] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.950020] ksys_mmap_pgoff+0x3af/0x500 [ 38.950354] do_syscall_64+0x3f/0x90 [ 38.950685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.951133] RIP: 0033:0x7fe966cb7d82 [ 38.951451] 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 [ 38.952915] RSP: 002b:00007fff7ce870e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.953501] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe966cb7d82 [ 38.954045] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe9660f1000 [ 38.954595] RBP: 00007fe9660f1000 R08: 0000000000000009 R09: 0000000000001000 [ 38.955171] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563733e80ec0 [ 38.955784] R13: 00007fff7ce87100 R14: 00007fff7ce87130 R15: 00007fff7ce87490 [ 38.956395] [ 38.956609] [ 38.956762] Allocated by task 212: [ 38.957076] kasan_save_stack+0x22/0x50 [ 38.957409] kasan_set_track+0x25/0x30 [ 38.957755] __kasan_slab_alloc+0x59/0x70 [ 38.958135] kmem_cache_alloc+0x16b/0x370 [ 38.958493] vm_area_dup+0x20/0x160 [ 38.958808] __split_vma+0x170/0x950 [ 38.959136] split_vma+0xc6/0x110 [ 38.959441] mprotect_fixup+0x8d2/0xb30 [ 38.959787] do_mprotect_pkey+0x87e/0xd40 [ 38.960147] __x64_sys_mprotect+0x78/0xc0 [ 38.960519] do_syscall_64+0x3f/0x90 [ 38.960937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.961456] [ 38.961625] Freed by task 19: [ 38.961900] kasan_save_stack+0x22/0x50 [ 38.962234] kasan_set_track+0x25/0x30 [ 38.962582] kasan_save_free_info+0x2b/0x50 [ 38.962956] __kasan_slab_free+0x10a/0x190 [ 38.963349] kmem_cache_free+0x10d/0x4d0 [ 38.963714] rcu_core+0x8c8/0x2860 [ 38.964029] __do_softirq+0x1b7/0x7d4 [ 38.964362] [ 38.964512] Last potentially related work creation: [ 38.964993] kasan_save_stack+0x22/0x50 [ 38.965347] __kasan_record_aux_stack+0x8e/0xa0 [ 38.965788] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.966239] remove_vma+0x139/0x170 [ 38.966550] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.966949] do_vmi_munmap+0x1f1/0x2b0 [ 38.967291] __vm_munmap+0x138/0x3a0 [ 38.967621] __x64_sys_munmap+0x59/0x80 [ 38.967963] do_syscall_64+0x3f/0x90 [ 38.968287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.968735] [ 38.968910] The buggy address belongs to the object at ffff88800fc132b8 [ 38.968910] which belongs to the cache vm_area_struct of size 168 [ 38.969937] The buggy address is located 88 bytes inside of [ 38.969937] freed 168-byte region [ffff88800fc132b8, ffff88800fc13360) [ 38.970899] [ 38.971056] The buggy address belongs to the physical page: [ 38.971529] page:00000000300b8f77 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc13 [ 38.972326] memcg:ffff888019e8f101 [ 38.972629] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.973109] page_type: 0xffffffff() [ 38.973437] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.974119] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e8f101 [ 38.974758] page dumped because: kasan: bad access detected [ 38.975227] [ 38.975383] Memory state around the buggy address: [ 38.975788] ffff88800fc13200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.976384] ffff88800fc13280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.977035] >ffff88800fc13300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.977642] ^ [ 38.977969] ffff88800fc13380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.978579] ffff88800fc13400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.979186] ================================================================== [ 38.980048] Disabling lock debugging due to kernel taint [ 40.469790] BUG: Bad rss-counter state mm:000000008add754d type:MM_FILEPAGES val:33 [ 40.470507] BUG: Bad rss-counter state mm:000000008add754d type:MM_ANONPAGES val:22 [ 40.844246] BUG: Bad rss-counter state mm:000000003652e127 type:MM_FILEPAGES val:33 [ 40.845383] BUG: Bad rss-counter state mm:000000003652e127 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27343' (ECDSA) to the list of known hosts. 2023/06/21 09:02:24 fuzzer started 2023/06/21 09:02:24 dialing manager at localhost:36067 2023/06/21 09:02:24 checking machine... 2023/06/21 09:02:24 checking revisions... [ 41.445388] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:02:25 testing simple program... [ 41.488408] cgroup: Unknown subsys name 'net' [ 41.523553] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:02:24 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6a RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff8880147ff9f8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff888010361d60 R13=ffffffff81704d42 R14=1ffff110028fff6a R15=0000000000000000 RIP=ffffffff8180f09a 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 00007f5f1db0c900 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=00007f5f1cf18b00 CR3=00000000144d2000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=8294066bccb5289c00000000000ae988 XMM05=f3467f2143d1d2260000000000132a90 XMM06=4fda316b135da52b0000000000131510 XMM07=fb795ef6d65770560000000000121b28 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806c400000 RBX=0000000099892842 RCX=ffff88806c894210 RDX=0000000000000008 RSI=0000000000000001 RDI=000000001ce728e1 RBP=ffff88800ffc9190 RSP=ffff888008e37a28 R8 =0000000050fc478b R9 =ffff888008e37998 R10=0000000000038001 R11=0000000000000128 R12=0000000000000001 R13=0000000000000000 R14=ffff888008e37a90 R15=0000000000000008 RIP=ffffffff822704d3 RFL=00000206 [-----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 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=00007f147d9bc008 CR3=0000000019c82000 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