syzkaller login: [ 38.707642] BUG: Bad rss-counter state mm:0000000052ebc3e0 type:MM_FILEPAGES val:33 [ 38.708681] BUG: Bad rss-counter state mm:0000000052ebc3e0 type:MM_ANONPAGES val:22 [ 38.881779] ================================================================== [ 38.882885] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.884023] Read of size 8 at addr ffff88800eee7df0 by task sshd/225 [ 38.885055] [ 38.885314] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.886358] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.887541] Call Trace: [ 38.887937] [ 38.888279] dump_stack_lvl+0x91/0xf0 [ 38.888871] print_report+0xcc/0x620 [ 38.889483] ? __virt_addr_valid+0x102/0x340 [ 38.890142] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.890896] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.891653] kasan_report+0xbe/0xf0 [ 38.892213] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.893010] vma_interval_tree_remove+0xc75/0xec0 [ 38.893739] vma_prepare+0xc54/0x11a0 [ 38.894303] __split_vma+0x5af/0x950 [ 38.894890] ? __pfx___split_vma+0x10/0x10 [ 38.895533] ? find_held_lock+0x2c/0x110 [ 38.896159] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.896833] ? lock_is_held_type+0x9f/0x120 [ 38.897504] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.898230] ? mtree_range_walk+0x632/0x900 [ 38.898913] ? mas_walk+0x5c7/0x7c0 [ 38.899482] do_vmi_munmap+0x1f1/0x2b0 [ 38.900091] mmap_region+0x1f9/0x2660 [ 38.900653] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.901258] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.902127] ? __pfx_lock_acquire+0x10/0x10 [ 38.902759] ? __pfx_mmap_region+0x10/0x10 [ 38.903398] ? security_mmap_addr+0x7d/0xa0 [ 38.904028] ? get_unmapped_area+0x1f5/0x3f0 [ 38.904711] do_mmap+0x854/0xf00 [ 38.905243] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.905826] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.906471] ksys_mmap_pgoff+0x3af/0x500 [ 38.907075] do_syscall_64+0x3f/0x90 [ 38.907650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.908434] RIP: 0033:0x7f8e8b12bd82 [ 38.909000] 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 [ 38.911542] RSP: 002b:00007ffd0eccbd48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.912622] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8e8b12bd82 [ 38.913631] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8e8a565000 [ 38.914626] RBP: 00007f8e8a565000 R08: 0000000000000009 R09: 0000000000001000 [ 38.915616] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561b89eadf70 [ 38.916629] R13: 00007ffd0eccbd60 R14: 00007ffd0eccbd90 R15: 00007ffd0eccc0f0 [ 38.917672] [ 38.918019] [ 38.918279] Allocated by task 218: [ 38.918788] kasan_save_stack+0x22/0x50 [ 38.919386] kasan_set_track+0x25/0x30 [ 38.919978] __kasan_slab_alloc+0x59/0x70 [ 38.920602] kmem_cache_alloc+0x16b/0x370 [ 38.921258] vm_area_dup+0x20/0x160 [ 38.921784] __split_vma+0x170/0x950 [ 38.922328] split_vma+0xc6/0x110 [ 38.922838] mprotect_fixup+0x8d2/0xb30 [ 38.923427] do_mprotect_pkey+0x87e/0xd40 [ 38.924037] __x64_sys_mprotect+0x78/0xc0 [ 38.924647] do_syscall_64+0x3f/0x90 [ 38.925210] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.925955] [ 38.926199] Freed by task 218: [ 38.926642] kasan_save_stack+0x22/0x50 [ 38.927204] kasan_set_track+0x25/0x30 [ 38.927755] kasan_save_free_info+0x2b/0x50 [ 38.928354] __kasan_slab_free+0x10a/0x190 [ 38.928965] kmem_cache_free+0x10d/0x4d0 [ 38.929540] rcu_core+0x8c8/0x2860 [ 38.930035] __do_softirq+0x1b7/0x7d4 [ 38.930571] [ 38.930814] Last potentially related work creation: [ 38.931468] kasan_save_stack+0x22/0x50 [ 38.932033] __kasan_record_aux_stack+0x8e/0xa0 [ 38.932672] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.933413] remove_vma+0x139/0x170 [ 38.933917] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.934542] do_vmi_munmap+0x1f1/0x2b0 [ 38.935091] __vm_munmap+0x138/0x3a0 [ 38.935628] __x64_sys_munmap+0x59/0x80 [ 38.936195] do_syscall_64+0x3f/0x90 [ 38.936736] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.937481] [ 38.937725] The buggy address belongs to the object at ffff88800eee7d98 [ 38.937725] which belongs to the cache vm_area_struct of size 168 [ 38.939399] The buggy address is located 88 bytes inside of [ 38.939399] freed 168-byte region [ffff88800eee7d98, ffff88800eee7e40) [ 38.940970] [ 38.941213] The buggy address belongs to the physical page: [ 38.941961] page:000000000517af0d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeee7 [ 38.943180] memcg:ffff888016900001 [ 38.943654] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.944373] page_type: 0xffffffff() [ 38.944882] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.945933] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016900001 [ 38.946953] page dumped because: kasan: bad access detected [ 38.947692] [ 38.947934] Memory state around the buggy address: [ 38.948586] ffff88800eee7c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.949550] ffff88800eee7d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.950522] >ffff88800eee7d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.951514] ^ [ 38.952461] ffff88800eee7e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.953459] ffff88800eee7e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.954439] ================================================================== [ 38.955554] Disabling lock debugging due to kernel taint [ 40.913484] BUG: Bad rss-counter state mm:000000002cdff511 type:MM_FILEPAGES val:33 [ 40.914659] BUG: Bad rss-counter state mm:000000002cdff511 type:MM_ANONPAGES val:22 [ 41.457262] BUG: Bad rss-counter state mm:000000001ca93ac0 type:MM_FILEPAGES val:33 [ 41.458591] BUG: Bad rss-counter state mm:000000001ca93ac0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8075' (ECDSA) to the list of known hosts. 2023/06/21 01:31:36 fuzzer started 2023/06/21 01:31:36 dialing manager at localhost:36067 2023/06/21 01:31:36 checking machine... 2023/06/21 01:31:36 checking revisions... [ 42.109890] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:31:36 testing simple program... [ 42.167117] cgroup: Unknown subsys name 'net' [ 42.217222] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:31:36 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff83ab1b24 RDI=ffff88800dc83a74 RBP=ffff88800dc83680 RSP=ffff88801cc574d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000c3100000c31 R12=ffff88800dc83680 R13=000000000000001b R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff81374525 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 00007f8ee51b4900 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=00007ffe8854d000 CR3=0000000016716000 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=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=00007fc058478048 CR3=000000000dcca000 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=2036333a31333a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a31333a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000