syzkaller login: [ 33.664456] BUG: Bad rss-counter state mm:0000000044a9acfb type:MM_FILEPAGES val:33 [ 33.665927] BUG: Bad rss-counter state mm:0000000044a9acfb type:MM_ANONPAGES val:22 [ 33.729824] ================================================================== [ 33.730744] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.731672] Read of size 8 at addr ffff88800d924228 by task sshd/221 [ 33.732576] [ 33.732795] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.733648] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.734654] Call Trace: [ 33.734969] [ 33.735255] dump_stack_lvl+0x91/0xf0 [ 33.735746] print_report+0xcc/0x620 [ 33.736224] ? __virt_addr_valid+0x102/0x340 [ 33.736775] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.737390] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.738003] kasan_report+0xbe/0xf0 [ 33.738491] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.739109] vma_interval_tree_remove+0xc75/0xec0 [ 33.739712] vma_prepare+0xc54/0x11a0 [ 33.740212] __split_vma+0x5af/0x950 [ 33.740686] ? __pfx___split_vma+0x10/0x10 [ 33.741216] ? find_held_lock+0x2c/0x110 [ 33.741741] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.742319] ? lock_is_held_type+0x9f/0x120 [ 33.742854] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.743468] ? mtree_range_walk+0x632/0x900 [ 33.744011] ? mas_walk+0x5c7/0x7c0 [ 33.744491] do_vmi_munmap+0x1f1/0x2b0 [ 33.744985] mmap_region+0x1f9/0x2660 [ 33.745466] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.745972] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.746704] ? __pfx_lock_acquire+0x10/0x10 [ 33.747237] ? __pfx_mmap_region+0x10/0x10 [ 33.747764] ? security_mmap_addr+0x7d/0xa0 [ 33.748292] ? get_unmapped_area+0x1f5/0x3f0 [ 33.748837] do_mmap+0x854/0xf00 [ 33.749278] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.749769] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.750343] ksys_mmap_pgoff+0x3af/0x500 [ 33.750853] do_syscall_64+0x3f/0x90 [ 33.751334] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.751977] RIP: 0033:0x7fc31fde4d82 [ 33.752432] 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 [ 33.754565] RSP: 002b:00007ffcd68840b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.755466] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc31fde4d82 [ 33.756304] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc31f21e000 [ 33.757144] RBP: 00007fc31f21e000 R08: 0000000000000009 R09: 0000000000001000 [ 33.757990] R10: 0000000000000812 R11: 0000000000000206 R12: 00005566013b1ec0 [ 33.758858] R13: 00007ffcd68840d0 R14: 00007ffcd6884100 R15: 00007ffcd6884460 [ 33.759715] [ 33.760003] [ 33.760217] Allocated by task 214: [ 33.760641] kasan_save_stack+0x22/0x50 [ 33.761146] kasan_set_track+0x25/0x30 [ 33.761636] __kasan_slab_alloc+0x59/0x70 [ 33.762170] kmem_cache_alloc+0x16b/0x370 [ 33.762686] vm_area_dup+0x20/0x160 [ 33.763136] __split_vma+0x170/0x950 [ 33.763601] split_vma+0xc6/0x110 [ 33.764037] mprotect_fixup+0x8d2/0xb30 [ 33.764538] do_mprotect_pkey+0x87e/0xd40 [ 33.765060] __x64_sys_mprotect+0x78/0xc0 [ 33.765589] do_syscall_64+0x3f/0x90 [ 33.766069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.766718] [ 33.766933] Freed by task 214: [ 33.767325] kasan_save_stack+0x22/0x50 [ 33.767835] kasan_set_track+0x25/0x30 [ 33.768327] kasan_save_free_info+0x2b/0x50 [ 33.768855] __kasan_slab_free+0x10a/0x190 [ 33.769382] kmem_cache_free+0x10d/0x4d0 [ 33.769892] rcu_core+0x8c8/0x2860 [ 33.770350] __do_softirq+0x1b7/0x7d4 [ 33.770831] [ 33.771048] Last potentially related work creation: [ 33.771632] kasan_save_stack+0x22/0x50 [ 33.772138] __kasan_record_aux_stack+0x8e/0xa0 [ 33.772716] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.773355] remove_vma+0x139/0x170 [ 33.773888] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.774458] do_vmi_munmap+0x1f1/0x2b0 [ 33.774942] __vm_munmap+0x138/0x3a0 [ 33.775415] __x64_sys_munmap+0x59/0x80 [ 33.775912] do_syscall_64+0x3f/0x90 [ 33.776392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.777030] [ 33.777243] The buggy address belongs to the object at ffff88800d9241d0 [ 33.777243] which belongs to the cache vm_area_struct of size 168 [ 33.778719] The buggy address is located 88 bytes inside of [ 33.778719] freed 168-byte region [ffff88800d9241d0, ffff88800d924278) [ 33.780118] [ 33.780338] The buggy address belongs to the physical page: [ 33.780992] page:000000008876d666 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd924 [ 33.782086] memcg:ffff8880103f3b01 [ 33.782520] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.783168] page_type: 0xffffffff() [ 33.783614] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.784535] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880103f3b01 [ 33.785441] page dumped because: kasan: bad access detected [ 33.786111] [ 33.786323] Memory state around the buggy address: [ 33.786905] ffff88800d924100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.787768] ffff88800d924180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.788634] >ffff88800d924200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.789480] ^ [ 33.790045] ffff88800d924280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.790919] ffff88800d924300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.791771] ================================================================== [ 33.792693] Disabling lock debugging due to kernel taint [ 35.848161] BUG: Bad rss-counter state mm:0000000005d0a65a type:MM_FILEPAGES val:33 [ 35.849109] BUG: Bad rss-counter state mm:0000000005d0a65a type:MM_ANONPAGES val:22 [ 36.335683] BUG: Bad rss-counter state mm:0000000006a33f9b type:MM_FILEPAGES val:33 [ 36.336691] BUG: Bad rss-counter state mm:0000000006a33f9b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62674' (ECDSA) to the list of known hosts. 2023/06/20 01:34:42 fuzzer started 2023/06/20 01:34:42 dialing manager at localhost:44161 2023/06/20 01:34:42 checking machine... 2023/06/20 01:34:42 checking revisions... [ 37.106145] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:34:42 testing simple program... [ 37.150351] cgroup: Unknown subsys name 'net' [ 37.189412] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:34:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864b0246 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888019c873c8 RSP=ffff888019c87300 R8 =ffffffff864b024a R9 =ffff888019c873b0 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff888019c873d0 R13=ffff888019c873b8 R14=ffff888019c87f58 R15=ffff888019c87370 RIP=ffffffff81131153 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 00007f37c113b900 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=00007ffea5463000 CR3=000000000947a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f71a9b56cb0 CR3=00000000103bc000 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=34333a3130203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383335 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000