syzkaller login: [ 31.836124] BUG: Bad rss-counter state mm:0000000052fd067a type:MM_FILEPAGES val:33 [ 31.836928] BUG: Bad rss-counter state mm:0000000052fd067a type:MM_ANONPAGES val:22 [ 31.870094] ================================================================== [ 31.870725] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.871362] Read of size 8 at addr ffff888019ec6880 by task sshd/221 [ 31.871871] [ 31.872022] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.872794] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.873520] Call Trace: [ 31.873723] [ 31.873899] dump_stack_lvl+0x91/0xf0 [ 31.874201] print_report+0xcc/0x620 [ 31.874520] ? __virt_addr_valid+0x102/0x340 [ 31.874913] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.875340] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.875771] kasan_report+0xbe/0xf0 [ 31.876089] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.876496] vma_interval_tree_remove+0xc75/0xec0 [ 31.876868] vma_prepare+0xc54/0x11a0 [ 31.877163] __split_vma+0x5af/0x950 [ 31.877509] ? __pfx___split_vma+0x10/0x10 [ 31.877877] ? find_held_lock+0x2c/0x110 [ 31.878252] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.878654] ? lock_is_held_type+0x9f/0x120 [ 31.879036] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.879446] ? mtree_range_walk+0x632/0x900 [ 31.879825] ? mas_walk+0x5c7/0x7c0 [ 31.880147] do_vmi_munmap+0x1f1/0x2b0 [ 31.880508] mmap_region+0x1f9/0x2660 [ 31.880807] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.881124] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.881599] ? __pfx_lock_acquire+0x10/0x10 [ 31.881967] ? __pfx_mmap_region+0x10/0x10 [ 31.882331] ? security_mmap_addr+0x7d/0xa0 [ 31.882700] ? get_unmapped_area+0x1f5/0x3f0 [ 31.883038] do_mmap+0x854/0xf00 [ 31.883306] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.883609] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.883951] ksys_mmap_pgoff+0x3af/0x500 [ 31.884317] do_syscall_64+0x3f/0x90 [ 31.884616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.885069] RIP: 0033:0x7f3e937d2d82 [ 31.885395] 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 [ 31.886814] RSP: 002b:00007ffd74e3e728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.887384] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3e937d2d82 [ 31.887903] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3e92c0c000 [ 31.888478] RBP: 00007f3e92c0c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.889150] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562ad2188ec0 [ 31.889743] R13: 00007ffd74e3e740 R14: 00007ffd74e3e770 R15: 00007ffd74e3ead0 [ 31.890331] [ 31.890532] [ 31.890678] Allocated by task 214: [ 31.890976] kasan_save_stack+0x22/0x50 [ 31.891327] kasan_set_track+0x25/0x30 [ 31.891628] __kasan_slab_alloc+0x59/0x70 [ 31.891948] kmem_cache_alloc+0x16b/0x370 [ 31.892318] vm_area_dup+0x20/0x160 [ 31.892596] __split_vma+0x170/0x950 [ 31.892887] split_vma+0xc6/0x110 [ 31.893167] mprotect_fixup+0x8d2/0xb30 [ 31.893518] do_mprotect_pkey+0x87e/0xd40 [ 31.893874] __x64_sys_mprotect+0x78/0xc0 [ 31.894240] do_syscall_64+0x3f/0x90 [ 31.894561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.895042] [ 31.895194] Freed by task 204: [ 31.895478] kasan_save_stack+0x22/0x50 [ 31.895825] kasan_set_track+0x25/0x30 [ 31.896164] kasan_save_free_info+0x2b/0x50 [ 31.896573] __kasan_slab_free+0x10a/0x190 [ 31.896950] kmem_cache_free+0x10d/0x4d0 [ 31.897300] rcu_core+0x8c8/0x2860 [ 31.897631] __do_softirq+0x1b7/0x7d4 [ 31.897933] [ 31.898064] Last potentially related work creation: [ 31.898426] kasan_save_stack+0x22/0x50 [ 31.898734] __kasan_record_aux_stack+0x8e/0xa0 [ 31.899106] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.899591] remove_vma+0x139/0x170 [ 31.899904] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.900323] do_vmi_munmap+0x1f1/0x2b0 [ 31.900622] __vm_munmap+0x138/0x3a0 [ 31.900917] __x64_sys_munmap+0x59/0x80 [ 31.901222] do_syscall_64+0x3f/0x90 [ 31.901516] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.901930] [ 31.902065] The buggy address belongs to the object at ffff888019ec6828 [ 31.902065] which belongs to the cache vm_area_struct of size 168 [ 31.903010] The buggy address is located 88 bytes inside of [ 31.903010] freed 168-byte region [ffff888019ec6828, ffff888019ec68d0) [ 31.903928] [ 31.904062] The buggy address belongs to the physical page: [ 31.904494] page:00000000f93fbd14 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ec6 [ 31.905181] memcg:ffff8880142e2a01 [ 31.905448] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.905879] page_type: 0xffffffff() [ 31.906185] raw: 0100000000000200 ffff8880087a0c80 ffffea000050bf80 000000000000000a [ 31.906826] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880142e2a01 [ 31.907421] page dumped because: kasan: bad access detected [ 31.907869] [ 31.908010] Memory state around the buggy address: [ 31.908478] ffff888019ec6780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.909044] ffff888019ec6800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.909605] >ffff888019ec6880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.910151] ^ [ 31.910422] ffff888019ec6900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.910967] ffff888019ec6980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.911507] ================================================================== [ 31.912274] Disabling lock debugging due to kernel taint [ 33.354098] BUG: Bad rss-counter state mm:00000000beef71b9 type:MM_FILEPAGES val:33 [ 33.354743] BUG: Bad rss-counter state mm:00000000beef71b9 type:MM_ANONPAGES val:22 [ 33.757227] BUG: Bad rss-counter state mm:000000007a48bd44 type:MM_FILEPAGES val:33 [ 33.757910] BUG: Bad rss-counter state mm:000000007a48bd44 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40092' (ECDSA) to the list of known hosts. 2023/06/21 09:28:09 fuzzer started 2023/06/21 09:28:09 dialing manager at localhost:36067 2023/06/21 09:28:09 checking machine... 2023/06/21 09:28:09 checking revisions... [ 34.275630] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:28:09 testing simple program... [ 34.317322] cgroup: Unknown subsys name 'net' [ 34.365985] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:28:09 Registers: info registers vcpu 0 RAX=ffffffff81acbef2 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11003395e9d RSI=ffffffff81acbef2 RDI=ffff888019caf558 RBP=ffff888019caf528 RSP=ffff888019caf488 R8 =0000000000000001 R9 =ffff888019caf4d0 R10=0000000000038001 R11=000000000002f794 R12=ffff888019caf558 R13=0000000000000000 R14=ffff888016b551c0 R15=0000000000000000 RIP=ffffffff813ad474 RFL=00000282 [--S----] 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 00007fe6cffff700 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=00007f593bb4e090 CR3=000000000e312000 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=2039303a38323a3930203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a38323a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000b5305 RBX=0000000000000002 RCX=ffffffff8451105d RDX=00000000000b5317 RSI=0000000000035110 RDI=ffffffff864b2f92 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff864b2f26 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130868 RFL=00000293 [--S-A-C] 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=00007fe979e01338 CR3=000000000e312000 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=38323a3930203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732039303a3832 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343732 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000