syzkaller login: [ 30.664001] BUG: Bad rss-counter state mm:000000008bb15d30 type:MM_FILEPAGES val:33 [ 30.665076] BUG: Bad rss-counter state mm:000000008bb15d30 type:MM_ANONPAGES val:22 [ 30.823613] ================================================================== [ 30.824641] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.825810] Read of size 8 at addr ffff88801ac313f8 by task sshd/227 [ 30.826627] [ 30.826834] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.827679] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.828587] Call Trace: [ 30.828900] [ 30.829196] dump_stack_lvl+0x91/0xf0 [ 30.829675] print_report+0xcc/0x620 [ 30.830134] ? __virt_addr_valid+0x102/0x340 [ 30.830648] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.831241] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.831818] kasan_report+0xbe/0xf0 [ 30.832264] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.832857] vma_interval_tree_remove+0xc75/0xec0 [ 30.833422] vma_prepare+0xc54/0x11a0 [ 30.833876] __split_vma+0x5af/0x950 [ 30.834328] ? __pfx___split_vma+0x10/0x10 [ 30.834830] ? find_held_lock+0x2c/0x110 [ 30.835347] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.836001] ? lock_is_held_type+0x9f/0x120 [ 30.836638] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.837355] ? mtree_range_walk+0x632/0x900 [ 30.838006] ? mas_walk+0x5c7/0x7c0 [ 30.838564] do_vmi_munmap+0x1f1/0x2b0 [ 30.839157] mmap_region+0x1f9/0x2660 [ 30.839725] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.840325] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.841164] ? __pfx_lock_acquire+0x10/0x10 [ 30.841790] ? __pfx_mmap_region+0x10/0x10 [ 30.842413] ? security_mmap_addr+0x7d/0xa0 [ 30.843059] ? get_unmapped_area+0x1f5/0x3f0 [ 30.843706] do_mmap+0x854/0xf00 [ 30.844223] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.844804] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.845462] ksys_mmap_pgoff+0x3af/0x500 [ 30.846062] do_syscall_64+0x3f/0x90 [ 30.846622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.847393] RIP: 0033:0x7f212451fd82 [ 30.847933] 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 [ 30.850434] RSP: 002b:00007ffcf13db978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.851503] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f212451fd82 [ 30.852504] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2123959000 [ 30.853504] RBP: 00007f2123959000 R08: 0000000000000009 R09: 0000000000001000 [ 30.854499] R10: 0000000000000812 R11: 0000000000000206 R12: 00005644e1ef7d90 [ 30.855523] R13: 00007ffcf13db990 R14: 00007ffcf13db9c0 R15: 00007ffcf13dbd20 [ 30.856537] [ 30.856881] [ 30.857133] Allocated by task 220: [ 30.857638] kasan_save_stack+0x22/0x50 [ 30.858229] kasan_set_track+0x25/0x30 [ 30.858809] __kasan_slab_alloc+0x59/0x70 [ 30.859431] kmem_cache_alloc+0x16b/0x370 [ 30.860037] vm_area_dup+0x20/0x160 [ 30.860564] __split_vma+0x170/0x950 [ 30.861112] split_vma+0xc6/0x110 [ 30.861623] mprotect_fixup+0x8d2/0xb30 [ 30.862213] do_mprotect_pkey+0x87e/0xd40 [ 30.862824] __x64_sys_mprotect+0x78/0xc0 [ 30.863450] do_syscall_64+0x3f/0x90 [ 30.864007] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.864759] [ 30.865010] Freed by task 220: [ 30.865466] kasan_save_stack+0x22/0x50 [ 30.866059] kasan_set_track+0x25/0x30 [ 30.866640] kasan_save_free_info+0x2b/0x50 [ 30.867274] __kasan_slab_free+0x10a/0x190 [ 30.867898] kmem_cache_free+0x10d/0x4d0 [ 30.868492] rcu_core+0x8c8/0x2860 [ 30.869012] __do_softirq+0x1b7/0x7d4 [ 30.869570] [ 30.869820] Last potentially related work creation: [ 30.870505] kasan_save_stack+0x22/0x50 [ 30.871105] __kasan_record_aux_stack+0x8e/0xa0 [ 30.871772] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.872518] remove_vma+0x139/0x170 [ 30.873093] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.873767] do_vmi_munmap+0x1f1/0x2b0 [ 30.874363] __vm_munmap+0x138/0x3a0 [ 30.874891] __x64_sys_munmap+0x59/0x80 [ 30.875474] do_syscall_64+0x3f/0x90 [ 30.876028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.876757] [ 30.877001] The buggy address belongs to the object at ffff88801ac313a0 [ 30.877001] which belongs to the cache vm_area_struct of size 168 [ 30.878705] The buggy address is located 88 bytes inside of [ 30.878705] freed 168-byte region [ffff88801ac313a0, ffff88801ac31448) [ 30.880350] [ 30.880602] The buggy address belongs to the physical page: [ 30.881363] page:0000000098100bc1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ac31 [ 30.882631] memcg:ffff88800f31ae01 [ 30.883130] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.883876] page_type: 0xffffffff() [ 30.884393] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.885466] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f31ae01 [ 30.886521] page dumped because: kasan: bad access detected [ 30.887308] [ 30.887555] Memory state around the buggy address: [ 30.888231] ffff88801ac31280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.889153] ffff88801ac31300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.890042] >ffff88801ac31380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.890932] ^ [ 30.891818] ffff88801ac31400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.892703] ffff88801ac31480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.893602] ================================================================== [ 30.894667] Disabling lock debugging due to kernel taint [ 33.596130] BUG: Bad rss-counter state mm:000000006003fb81 type:MM_FILEPAGES val:33 [ 33.597252] BUG: Bad rss-counter state mm:000000006003fb81 type:MM_ANONPAGES val:22 [ 34.081878] BUG: Bad rss-counter state mm:000000008cb6be13 type:MM_FILEPAGES val:33 [ 34.082982] BUG: Bad rss-counter state mm:000000008cb6be13 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41903' (ECDSA) to the list of known hosts. 2023/06/20 13:38:28 fuzzer started 2023/06/20 13:38:28 dialing manager at localhost:36067 2023/06/20 13:38:28 checking machine... 2023/06/20 13:38:28 checking revisions... [ 34.788205] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:38:28 testing simple program... [ 34.842219] cgroup: Unknown subsys name 'net' [ 34.895598] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:38:28 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b30b6 RDX=0000000000000008 RSI=ffff8880103cfc20 RDI=ffff8880103cf418 RBP=ffff8880103cf470 RSP=ffff8880103cf3a0 R8 =ffffffff863b30ba R9 =ffff8880103cf458 R10=0000000000038001 R11=000000000008a89d R12=ffff8880103cf478 R13=ffff8880103cf460 R14=ffff8880103cfc28 R15=ffff8880103cf418 RIP=ffffffff811303fa 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 00007f3cdce70900 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=00007fe658a47650 CR3=000000000f2ea000 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=daa2b9c6318d473c00000000000ae988 XMM05=e48563cc6a8d3e6b0000000000133798 XMM06=16bbfc4fa606b6250000000000132630 XMM07=fb795ef6d657705600000000001227a8 XMM08=4f5453444600273d67736d000d0a0920 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=ffff888008c04400 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=00007ffe7ca284e8 CR3=000000000fe78000 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=2038323a38333a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a38333a3331203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000