syzkaller login: [ 31.775636] BUG: Bad rss-counter state mm:00000000b3e8a3af type:MM_FILEPAGES val:33 [ 31.776663] BUG: Bad rss-counter state mm:00000000b3e8a3af type:MM_ANONPAGES val:22 [ 31.816299] ================================================================== [ 31.817566] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.818633] Read of size 8 at addr ffff88800fda4228 by task sshd/220 [ 31.819515] [ 31.819764] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.820715] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.821797] Call Trace: [ 31.822148] [ 31.822465] dump_stack_lvl+0x91/0xf0 [ 31.823011] print_report+0xcc/0x620 [ 31.823547] ? __virt_addr_valid+0x102/0x340 [ 31.824191] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.824881] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.825606] kasan_report+0xbe/0xf0 [ 31.826148] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.826875] vma_interval_tree_remove+0xc75/0xec0 [ 31.827564] vma_prepare+0xc54/0x11a0 [ 31.828101] __split_vma+0x5af/0x950 [ 31.828645] ? __pfx___split_vma+0x10/0x10 [ 31.829254] ? find_held_lock+0x2c/0x110 [ 31.829850] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.830492] ? lock_is_held_type+0x9f/0x120 [ 31.831110] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.831810] ? mtree_range_walk+0x632/0x900 [ 31.832444] ? mas_walk+0x5c7/0x7c0 [ 31.832992] do_vmi_munmap+0x1f1/0x2b0 [ 31.833575] mmap_region+0x1f9/0x2660 [ 31.834128] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.834716] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.835526] ? __pfx_lock_acquire+0x10/0x10 [ 31.836138] ? __pfx_mmap_region+0x10/0x10 [ 31.836750] ? security_mmap_addr+0x7d/0xa0 [ 31.837358] ? get_unmapped_area+0x1f5/0x3f0 [ 31.837994] do_mmap+0x854/0xf00 [ 31.838493] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.839064] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.839703] ksys_mmap_pgoff+0x3af/0x500 [ 31.840284] do_syscall_64+0x3f/0x90 [ 31.840828] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.841577] RIP: 0033:0x7f7817631d82 [ 31.842099] 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 [ 31.844527] RSP: 002b:00007ffcc6fb70b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.845563] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7817631d82 [ 31.846529] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7816a6b000 [ 31.847500] RBP: 00007f7816a6b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.848469] R10: 0000000000000812 R11: 0000000000000206 R12: 00005574a13adec0 [ 31.849445] R13: 00007ffcc6fb70d0 R14: 00007ffcc6fb7100 R15: 00007ffcc6fb7460 [ 31.850440] [ 31.850774] [ 31.851020] Allocated by task 213: [ 31.851515] kasan_save_stack+0x22/0x50 [ 31.852094] kasan_set_track+0x25/0x30 [ 31.852661] __kasan_slab_alloc+0x59/0x70 [ 31.853263] kmem_cache_alloc+0x16b/0x370 [ 31.853860] vm_area_dup+0x20/0x160 [ 31.854378] __split_vma+0x170/0x950 [ 31.854915] split_vma+0xc6/0x110 [ 31.855413] mprotect_fixup+0x8d2/0xb30 [ 31.855992] do_mprotect_pkey+0x87e/0xd40 [ 31.856589] __x64_sys_mprotect+0x78/0xc0 [ 31.857185] do_syscall_64+0x3f/0x90 [ 31.857743] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.858480] [ 31.858726] Freed by task 213: [ 31.859172] kasan_save_stack+0x22/0x50 [ 31.859749] kasan_set_track+0x25/0x30 [ 31.860312] kasan_save_free_info+0x2b/0x50 [ 31.860924] __kasan_slab_free+0x10a/0x190 [ 31.861548] kmem_cache_free+0x10d/0x4d0 [ 31.862127] rcu_core+0x8c8/0x2860 [ 31.862635] __do_softirq+0x1b7/0x7d4 [ 31.863180] [ 31.863423] Last potentially related work creation: [ 31.864094] kasan_save_stack+0x22/0x50 [ 31.864675] __kasan_record_aux_stack+0x8e/0xa0 [ 31.865326] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.866066] remove_vma+0x139/0x170 [ 31.866581] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.867221] do_vmi_munmap+0x1f1/0x2b0 [ 31.867776] __vm_munmap+0x138/0x3a0 [ 31.868304] __x64_sys_munmap+0x59/0x80 [ 31.868871] do_syscall_64+0x3f/0x90 [ 31.869417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.870174] [ 31.870418] The buggy address belongs to the object at ffff88800fda41d0 [ 31.870418] which belongs to the cache vm_area_struct of size 168 [ 31.872099] The buggy address is located 88 bytes inside of [ 31.872099] freed 168-byte region [ffff88800fda41d0, ffff88800fda4278) [ 31.873713] [ 31.873957] The buggy address belongs to the physical page: [ 31.874707] page:00000000a0ee6540 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfda4 [ 31.875950] memcg:ffff888013f03201 [ 31.876434] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.877171] page_type: 0xffffffff() [ 31.877699] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.878737] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f03201 [ 31.879772] page dumped because: kasan: bad access detected [ 31.880528] [ 31.880776] Memory state around the buggy address: [ 31.881443] ffff88800fda4100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.882448] ffff88800fda4180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.883425] >ffff88800fda4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.884402] ^ [ 31.885036] ffff88800fda4280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.886022] ffff88800fda4300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.887002] ================================================================== [ 31.888245] Disabling lock debugging due to kernel taint [ 34.188008] BUG: Bad rss-counter state mm:00000000dafcdcff type:MM_FILEPAGES val:33 [ 34.189130] BUG: Bad rss-counter state mm:00000000dafcdcff type:MM_ANONPAGES val:22 [ 34.787072] BUG: Bad rss-counter state mm:0000000074d18a71 type:MM_FILEPAGES val:33 [ 34.788244] BUG: Bad rss-counter state mm:0000000074d18a71 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4940' (ECDSA) to the list of known hosts. 2023/06/21 01:18:51 fuzzer started 2023/06/21 01:18:51 dialing manager at localhost:36067 2023/06/21 01:18:51 checking machine... 2023/06/21 01:18:51 checking revisions... [ 35.469277] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:18:51 testing simple program... [ 35.525327] cgroup: Unknown subsys name 'net' [ 35.577885] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:18:51 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8613873c RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800fb7fa00 RSP=ffff88800fb7f938 R8 =ffffffff86138740 R9 =ffff88800fb7f9e8 R10=0000000000038001 R11=0000000000020c5e R12=ffff88800fb7fa08 R13=ffff88800fb7f9f0 R14=0000000000000008 R15=ffff88800fb7f9a8 RIP=ffffffff81131434 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 00007fc0b79d9900 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=00007fc0b7f8e650 CR3=000000000d8c2000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=ffff88800ea60000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11002dcdf33 RSP=ffff888016e6f980 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff8164ce6b R14=ffff888016e59000 R15=ffff88800ea60000 RIP=ffffffff8180fea8 RFL=00000256 [---ZAP-] 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 00007fa1498bb700 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=00007fcc29e8e660 CR3=000000000d98a000 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=2030353a38313a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a38313a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000