syzkaller login: [ 38.764608] BUG: Bad rss-counter state mm:00000000111459b1 type:MM_FILEPAGES val:33 [ 38.765798] BUG: Bad rss-counter state mm:00000000111459b1 type:MM_ANONPAGES val:22 [ 38.943341] ================================================================== [ 38.944252] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.945168] Read of size 8 at addr ffff88800db33798 by task sshd/219 [ 38.946032] [ 38.946246] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.947101] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.948187] Call Trace: [ 38.948664] [ 38.949073] dump_stack_lvl+0x91/0xf0 [ 38.949760] print_report+0xcc/0x620 [ 38.950409] ? __virt_addr_valid+0x102/0x340 [ 38.951086] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.951842] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.952593] kasan_report+0xbe/0xf0 [ 38.953161] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.953937] vma_interval_tree_remove+0xc75/0xec0 [ 38.954661] vma_prepare+0xc54/0x11a0 [ 38.955243] __split_vma+0x5af/0x950 [ 38.955826] ? __pfx___split_vma+0x10/0x10 [ 38.956460] ? find_held_lock+0x2c/0x110 [ 38.957085] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.957777] ? lock_is_held_type+0x9f/0x120 [ 38.958440] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.959168] ? mtree_range_walk+0x632/0x900 [ 38.959840] ? mas_walk+0x5c7/0x7c0 [ 38.960402] do_vmi_munmap+0x1f1/0x2b0 [ 38.960992] mmap_region+0x1f9/0x2660 [ 38.961585] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.962204] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.963073] ? __pfx_lock_acquire+0x10/0x10 [ 38.963736] ? __pfx_mmap_region+0x10/0x10 [ 38.964378] ? security_mmap_addr+0x7d/0xa0 [ 38.965018] ? get_unmapped_area+0x1f5/0x3f0 [ 38.965711] do_mmap+0x854/0xf00 [ 38.966241] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.966841] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.967527] ksys_mmap_pgoff+0x3af/0x500 [ 38.968137] do_syscall_64+0x3f/0x90 [ 38.968722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.969505] RIP: 0033:0x7ff37a805d82 [ 38.970057] 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 [ 38.972656] RSP: 002b:00007ffddfe18328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.973775] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff37a805d82 [ 38.974821] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff379c3f000 [ 38.975851] RBP: 00007ff379c3f000 R08: 0000000000000009 R09: 0000000000001000 [ 38.976899] R10: 0000000000000812 R11: 0000000000000206 R12: 00005609d577af70 [ 38.977815] R13: 00007ffddfe18340 R14: 00007ffddfe18370 R15: 00007ffddfe186d0 [ 38.978681] [ 38.978980] [ 38.979199] Allocated by task 212: [ 38.979638] kasan_save_stack+0x22/0x50 [ 38.980143] kasan_set_track+0x25/0x30 [ 38.980634] __kasan_slab_alloc+0x59/0x70 [ 38.981153] kmem_cache_alloc+0x16b/0x370 [ 38.981694] vm_area_dup+0x20/0x160 [ 38.982167] __split_vma+0x170/0x950 [ 38.982636] split_vma+0xc6/0x110 [ 38.983073] mprotect_fixup+0x8d2/0xb30 [ 38.983547] do_mprotect_pkey+0x87e/0xd40 [ 38.984040] __x64_sys_mprotect+0x78/0xc0 [ 38.984541] do_syscall_64+0x3f/0x90 [ 38.984987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.985607] [ 38.985821] Freed by task 212: [ 38.986207] kasan_save_stack+0x22/0x50 [ 38.986709] kasan_set_track+0x25/0x30 [ 38.987200] kasan_save_free_info+0x2b/0x50 [ 38.987729] __kasan_slab_free+0x10a/0x190 [ 38.988250] kmem_cache_free+0x10d/0x4d0 [ 38.988757] rcu_core+0x8c8/0x2860 [ 38.989212] __do_softirq+0x1b7/0x7d4 [ 38.989711] [ 38.989934] Last potentially related work creation: [ 38.990549] kasan_save_stack+0x22/0x50 [ 38.991069] __kasan_record_aux_stack+0x8e/0xa0 [ 38.991645] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.992312] remove_vma+0x139/0x170 [ 38.992773] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.993354] do_vmi_munmap+0x1f1/0x2b0 [ 38.993866] __vm_munmap+0x138/0x3a0 [ 38.994353] __x64_sys_munmap+0x59/0x80 [ 38.994873] do_syscall_64+0x3f/0x90 [ 38.995366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.996034] [ 38.996255] Second to last potentially related work creation: [ 38.996968] kasan_save_stack+0x22/0x50 [ 38.997514] __kasan_record_aux_stack+0x8e/0xa0 [ 38.998107] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.998803] remove_vma+0x139/0x170 [ 38.999268] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.999844] do_vmi_munmap+0x1f1/0x2b0 [ 39.000353] mmap_region+0x1f9/0x2660 [ 39.000840] do_mmap+0x854/0xf00 [ 39.001287] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.001801] ksys_mmap_pgoff+0x3af/0x500 [ 39.002323] do_syscall_64+0x3f/0x90 [ 39.002810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.003481] [ 39.003702] The buggy address belongs to the object at ffff88800db33740 [ 39.003702] which belongs to the cache vm_area_struct of size 168 [ 39.005230] The buggy address is located 88 bytes inside of [ 39.005230] freed 168-byte region [ffff88800db33740, ffff88800db337e8) [ 39.006696] [ 39.006921] The buggy address belongs to the physical page: [ 39.007614] page:00000000756c8826 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb33 [ 39.008745] memcg:ffff88800d48bb01 [ 39.009187] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.009925] page_type: 0xffffffff() [ 39.010397] raw: 0100000000000200 ffff8880087a0c80 ffffea0000393580 dead000000000003 [ 39.011346] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d48bb01 [ 39.012292] page dumped because: kasan: bad access detected [ 39.012981] [ 39.013202] Memory state around the buggy address: [ 39.013810] ffff88800db33680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.014701] ffff88800db33700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.015589] >ffff88800db33780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.016467] ^ [ 39.016976] ffff88800db33800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 39.017891] ffff88800db33880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 39.018778] ================================================================== [ 39.019782] Disabling lock debugging due to kernel taint [ 40.931714] BUG: Bad rss-counter state mm:000000004ce78f03 type:MM_FILEPAGES val:33 [ 40.932888] BUG: Bad rss-counter state mm:000000004ce78f03 type:MM_ANONPAGES val:22 [ 41.479157] BUG: Bad rss-counter state mm:00000000836c4b01 type:MM_FILEPAGES val:33 [ 41.480335] BUG: Bad rss-counter state mm:00000000836c4b01 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42007' (ECDSA) to the list of known hosts. 2023/06/21 05:22:11 fuzzer started 2023/06/21 05:22:11 dialing manager at localhost:36067 2023/06/21 05:22:11 checking machine... 2023/06/21 05:22:11 checking revisions... [ 42.129328] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:22:12 testing simple program... [ 42.183623] cgroup: Unknown subsys name 'net' [ 42.237587] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:22:11 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce361a0 RCX=1ffffffff0f6d440 RDX=1ffff1100d9c6c39 RSI=ffffffff81830805 RDI=ffff88806ce361a0 RBP=ffff88800f7eb680 RSP=ffff888019cf7c88 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=ffff88806ce361c8 R13=ffffffff87b6a200 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff812d865e RFL=00000046 [---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 00007f2d909ff900 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=00007f2d90fb4650 CR3=000000000b992000 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=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=00007ffc220fbad8 CR3=000000000df4c000 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=2031313a32323a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a32323a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000