syzkaller login: [ 35.893316] BUG: Bad rss-counter state mm:000000008ea065d8 type:MM_FILEPAGES val:33 [ 35.894594] BUG: Bad rss-counter state mm:000000008ea065d8 type:MM_ANONPAGES val:22 [ 35.934561] ================================================================== [ 35.935529] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.936534] Read of size 8 at addr ffff88800e0424e0 by task sshd/219 [ 35.937315] [ 35.937536] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.938426] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.939414] Call Trace: [ 35.939736] [ 35.940022] dump_stack_lvl+0x91/0xf0 [ 35.940510] print_report+0xcc/0x620 [ 35.941000] ? __virt_addr_valid+0x102/0x340 [ 35.941550] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.942185] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.942807] kasan_report+0xbe/0xf0 [ 35.943285] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.943911] vma_interval_tree_remove+0xc75/0xec0 [ 35.944534] vma_prepare+0xc54/0x11a0 [ 35.945025] __split_vma+0x5af/0x950 [ 35.945501] ? __pfx___split_vma+0x10/0x10 [ 35.946058] ? find_held_lock+0x2c/0x110 [ 35.946584] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.947161] ? lock_is_held_type+0x9f/0x120 [ 35.947706] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.948325] ? mtree_range_walk+0x632/0x900 [ 35.948889] ? mas_walk+0x5c7/0x7c0 [ 35.949366] do_vmi_munmap+0x1f1/0x2b0 [ 35.949890] mmap_region+0x1f9/0x2660 [ 35.950378] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.950900] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.951631] ? __pfx_lock_acquire+0x10/0x10 [ 35.952166] ? __pfx_mmap_region+0x10/0x10 [ 35.952700] ? security_mmap_addr+0x7d/0xa0 [ 35.953239] ? get_unmapped_area+0x1f5/0x3f0 [ 35.953808] do_mmap+0x854/0xf00 [ 35.954252] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.954755] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.955322] ksys_mmap_pgoff+0x3af/0x500 [ 35.955831] do_syscall_64+0x3f/0x90 [ 35.956309] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.956968] RIP: 0033:0x7f982e117d82 [ 35.957422] 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 [ 35.959581] RSP: 002b:00007fff6da6b308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.960488] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f982e117d82 [ 35.961345] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f982d551000 [ 35.962244] RBP: 00007f982d551000 R08: 0000000000000009 R09: 0000000000001000 [ 35.963099] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a0eac83b20 [ 35.963964] R13: 00007fff6da6b320 R14: 00007fff6da6b350 R15: 00007fff6da6b6b0 [ 35.964826] [ 35.965118] [ 35.965335] Allocated by task 212: [ 35.965774] kasan_save_stack+0x22/0x50 [ 35.966285] kasan_set_track+0x25/0x30 [ 35.966788] __kasan_slab_alloc+0x59/0x70 [ 35.967312] kmem_cache_alloc+0x16b/0x370 [ 35.967834] vm_area_dup+0x20/0x160 [ 35.968294] __split_vma+0x170/0x950 [ 35.968767] split_vma+0xc6/0x110 [ 35.969213] mprotect_fixup+0x8d2/0xb30 [ 35.969729] do_mprotect_pkey+0x87e/0xd40 [ 35.970253] __x64_sys_mprotect+0x78/0xc0 [ 35.970779] do_syscall_64+0x3f/0x90 [ 35.971254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.971897] [ 35.972113] Freed by task 212: [ 35.972505] kasan_save_stack+0x22/0x50 [ 35.973010] kasan_set_track+0x25/0x30 [ 35.973509] kasan_save_free_info+0x2b/0x50 [ 35.974057] __kasan_slab_free+0x10a/0x190 [ 35.974594] kmem_cache_free+0x10d/0x4d0 [ 35.975104] rcu_core+0x8c8/0x2860 [ 35.975552] __do_softirq+0x1b7/0x7d4 [ 35.976037] [ 35.976254] Last potentially related work creation: [ 35.976852] kasan_save_stack+0x22/0x50 [ 35.977359] __kasan_record_aux_stack+0x8e/0xa0 [ 35.977947] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.978607] remove_vma+0x139/0x170 [ 35.979070] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.979640] do_vmi_munmap+0x1f1/0x2b0 [ 35.980132] __vm_munmap+0x138/0x3a0 [ 35.980612] __x64_sys_munmap+0x59/0x80 [ 35.981116] do_syscall_64+0x3f/0x90 [ 35.981601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.982257] [ 35.982473] Second to last potentially related work creation: [ 35.983174] kasan_save_stack+0x22/0x50 [ 35.983683] __kasan_record_aux_stack+0x8e/0xa0 [ 35.984258] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.984901] remove_vma+0x139/0x170 [ 35.985357] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.985931] do_vmi_munmap+0x1f1/0x2b0 [ 35.986424] mmap_region+0x1f9/0x2660 [ 35.986912] do_mmap+0x854/0xf00 [ 35.987343] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.987844] ksys_mmap_pgoff+0x3af/0x500 [ 35.988354] do_syscall_64+0x3f/0x90 [ 35.988841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.989489] [ 35.989716] The buggy address belongs to the object at ffff88800e042488 [ 35.989716] which belongs to the cache vm_area_struct of size 168 [ 35.991208] The buggy address is located 88 bytes inside of [ 35.991208] freed 168-byte region [ffff88800e042488, ffff88800e042530) [ 35.992619] [ 35.992840] The buggy address belongs to the physical page: [ 35.993504] page:00000000cd68c39d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe042 [ 35.994606] memcg:ffff88800e1c4a01 [ 35.995038] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.995689] page_type: 0xffffffff() [ 35.996154] raw: 0100000000000200 ffff88800879fc80 ffffea000063a600 dead000000000008 [ 35.997086] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1c4a01 [ 35.998003] page dumped because: kasan: bad access detected [ 35.998686] [ 35.998903] Memory state around the buggy address: [ 35.999485] ffff88800e042380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.000354] ffff88800e042400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 36.001211] >ffff88800e042480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.002093] ^ [ 36.002856] ffff88800e042500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 36.003720] ffff88800e042580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.004592] ================================================================== [ 36.005647] Disabling lock debugging due to kernel taint [ 38.203576] BUG: Bad rss-counter state mm:00000000289d74bc type:MM_FILEPAGES val:33 [ 38.204733] BUG: Bad rss-counter state mm:00000000289d74bc type:MM_ANONPAGES val:22 [ 38.703850] BUG: Bad rss-counter state mm:00000000c33de423 type:MM_FILEPAGES val:33 [ 38.705015] BUG: Bad rss-counter state mm:00000000c33de423 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8337' (ECDSA) to the list of known hosts. 2023/06/19 21:12:35 fuzzer started 2023/06/19 21:12:35 dialing manager at localhost:44161 2023/06/19 21:12:35 checking machine... 2023/06/19 21:12:35 checking revisions... [ 39.386010] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:12:35 testing simple program... [ 39.432169] cgroup: Unknown subsys name 'net' [ 39.472018] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:12:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86114dc2 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86114dc6 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000001b1a9 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130ad6 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9597509900 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=00007f959697fe40 CR3=000000000d9cc000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=4bcfee8bd419fdc600000000000ae988 XMM05=a45acc95b759dfd200000000001360a8 XMM06=dfcdbad4f1609c370000000000134bd0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888019d59580 RCX=0000000000000004 RDX=0000000000000004 RSI=0000000000000000 RDI=ffffed10033ab2b0 RBP=0000000000000020 RSP=ffff888019b8fbd8 R8 =ffff888019d59580 R9 =0000000000000000 R10=ffffed10033ab2b0 R11=00000000000b6996 R12=ffff888019d59580 R13=0000000000000dc0 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff8450d432 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 00007f612015c900 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=00007fffa2ac0000 CR3=000000000f09c000 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=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