syzkaller login: [ 29.688054] BUG: Bad rss-counter state mm:0000000086214ff6 type:MM_FILEPAGES val:33 [ 29.689281] BUG: Bad rss-counter state mm:0000000086214ff6 type:MM_ANONPAGES val:22 [ 29.728317] ================================================================== [ 29.729528] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.731050] Read of size 8 at addr ffff88800c6a8058 by task sshd/222 [ 29.732206] [ 29.732477] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.733688] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.735061] Call Trace: [ 29.735458] [ 29.735799] dump_stack_lvl+0x91/0xf0 [ 29.736388] print_report+0xcc/0x620 [ 29.736956] ? __virt_addr_valid+0x102/0x340 [ 29.737628] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.738389] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.739166] kasan_report+0xbe/0xf0 [ 29.739692] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.740309] vma_interval_tree_remove+0xc75/0xec0 [ 29.740908] vma_prepare+0xc54/0x11a0 [ 29.741383] __split_vma+0x5af/0x950 [ 29.741854] ? __pfx___split_vma+0x10/0x10 [ 29.742378] ? find_held_lock+0x2c/0x110 [ 29.742892] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.743467] ? lock_is_held_type+0x9f/0x120 [ 29.744000] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.744609] ? mtree_range_walk+0x632/0x900 [ 29.745159] ? mas_walk+0x5c7/0x7c0 [ 29.745633] do_vmi_munmap+0x1f1/0x2b0 [ 29.746121] mmap_region+0x1f9/0x2660 [ 29.746613] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.747127] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.747836] ? __pfx_lock_acquire+0x10/0x10 [ 29.748373] ? __pfx_mmap_region+0x10/0x10 [ 29.748897] ? security_mmap_addr+0x7d/0xa0 [ 29.749423] ? get_unmapped_area+0x1f5/0x3f0 [ 29.749969] do_mmap+0x854/0xf00 [ 29.750405] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.750895] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.751472] ksys_mmap_pgoff+0x3af/0x500 [ 29.751978] do_syscall_64+0x3f/0x90 [ 29.752453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.753103] RIP: 0033:0x7f3330cbad82 [ 29.753560] 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 [ 29.755709] RSP: 002b:00007ffef9aaecc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.756621] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3330cbad82 [ 29.757475] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f33300f4000 [ 29.758328] RBP: 00007f33300f4000 R08: 0000000000000009 R09: 0000000000001000 [ 29.759223] R10: 0000000000000812 R11: 0000000000000206 R12: 00005570cc979ec0 [ 29.760118] R13: 00007ffef9aaece0 R14: 00007ffef9aaed10 R15: 00007ffef9aaf070 [ 29.761031] [ 29.761339] [ 29.761565] Allocated by task 215: [ 29.762017] kasan_save_stack+0x22/0x50 [ 29.762554] kasan_set_track+0x25/0x30 [ 29.763088] __kasan_slab_alloc+0x59/0x70 [ 29.763632] kmem_cache_alloc+0x16b/0x370 [ 29.764185] vm_area_dup+0x20/0x160 [ 29.764675] __split_vma+0x170/0x950 [ 29.765177] split_vma+0xc6/0x110 [ 29.765657] mprotect_fixup+0x8d2/0xb30 [ 29.766210] do_mprotect_pkey+0x87e/0xd40 [ 29.766772] __x64_sys_mprotect+0x78/0xc0 [ 29.767349] do_syscall_64+0x3f/0x90 [ 29.767860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.768546] [ 29.768779] Freed by task 212: [ 29.769199] kasan_save_stack+0x22/0x50 [ 29.769741] kasan_set_track+0x25/0x30 [ 29.770272] kasan_save_free_info+0x2b/0x50 [ 29.770836] __kasan_slab_free+0x10a/0x190 [ 29.771416] kmem_cache_free+0x10d/0x4d0 [ 29.771954] rcu_core+0x8c8/0x2860 [ 29.772429] __do_softirq+0x1b7/0x7d4 [ 29.772947] [ 29.773168] Last potentially related work creation: [ 29.773880] kasan_save_stack+0x22/0x50 [ 29.774418] __kasan_record_aux_stack+0x8e/0xa0 [ 29.775034] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.775746] remove_vma+0x139/0x170 [ 29.776220] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.776815] do_vmi_munmap+0x1f1/0x2b0 [ 29.777331] __vm_munmap+0x138/0x3a0 [ 29.777830] __x64_sys_munmap+0x59/0x80 [ 29.778350] do_syscall_64+0x3f/0x90 [ 29.778857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.779557] [ 29.779788] The buggy address belongs to the object at ffff88800c6a8000 [ 29.779788] which belongs to the cache vm_area_struct of size 168 [ 29.781348] The buggy address is located 88 bytes inside of [ 29.781348] freed 168-byte region [ffff88800c6a8000, ffff88800c6a80a8) [ 29.782843] [ 29.783059] The buggy address belongs to the physical page: [ 29.783770] page:0000000053ea5d89 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6a8 [ 29.784910] memcg:ffff88800c6ac101 [ 29.785353] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.786025] page_type: 0xffffffff() [ 29.786497] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.787474] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6ac101 [ 29.788443] page dumped because: kasan: bad access detected [ 29.789150] [ 29.789376] Memory state around the buggy address: [ 29.789998] ffff88800c6a7f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 29.790899] ffff88800c6a7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.791811] >ffff88800c6a8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.792698] ^ [ 29.793467] ffff88800c6a8080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 29.794363] ffff88800c6a8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.795269] ================================================================== [ 29.796243] Disabling lock debugging due to kernel taint [ 31.681837] BUG: Bad rss-counter state mm:00000000d1d51dce type:MM_FILEPAGES val:33 [ 31.682851] BUG: Bad rss-counter state mm:00000000d1d51dce type:MM_ANONPAGES val:22 [ 32.112207] BUG: Bad rss-counter state mm:000000006a98e3a1 type:MM_FILEPAGES val:33 [ 32.113841] BUG: Bad rss-counter state mm:000000006a98e3a1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65378' (ECDSA) to the list of known hosts. 2023/06/20 22:24:22 fuzzer started 2023/06/20 22:24:22 dialing manager at localhost:36067 2023/06/20 22:24:22 checking machine... 2023/06/20 22:24:22 checking revisions... [ 32.866342] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:24:22 testing simple program... [ 32.918876] cgroup: Unknown subsys name 'net' [ 32.982949] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:24:21 Registers: info registers vcpu 0 RAX=ffff888008d90000 RBX=ffff888008d9f9e8 RCX=ffffffff81132ffe RDX=ffff888008d9f900 RSI=0000000000000000 RDI=ffff888008d9f9c0 RBP=ffff888008d90000 RSP=ffff888008d9f900 R8 =0000000000000130 R9 =0000000000000000 R10=ffff888008d9f950 R11=0000000000000128 R12=0000000000000000 R13=ffff888008d9f978 R14=ffff888008d9f998 R15=ffff888008d9f950 RIP=ffffffff81133010 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 0000000000000000 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=00007ff3ece26650 CR3=0000000006846000 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=34323a3232203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3133325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363030 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007fd03c9273b0 CR3=0000000006846000 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=2031323a34323a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a34323a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000