syzkaller login: [ 49.175870] BUG: Bad rss-counter state mm:0000000063d39d72 type:MM_FILEPAGES val:33 [ 49.177608] BUG: Bad rss-counter state mm:0000000063d39d72 type:MM_ANONPAGES val:22 [ 49.339224] ================================================================== [ 49.340078] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.340956] Read of size 8 at addr ffff88800efecdf0 by task sshd/219 [ 49.341687] [ 49.341986] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.342791] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.343692] Call Trace: [ 49.344032] [ 49.344300] dump_stack_lvl+0x91/0xf0 [ 49.344762] print_report+0xcc/0x620 [ 49.345227] ? __virt_addr_valid+0x102/0x340 [ 49.345775] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.346354] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.346939] kasan_report+0xbe/0xf0 [ 49.347389] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.347981] vma_interval_tree_remove+0xc75/0xec0 [ 49.348544] vma_prepare+0xc54/0x11a0 [ 49.348999] __split_vma+0x5af/0x950 [ 49.349484] ? __pfx___split_vma+0x10/0x10 [ 49.350020] ? find_held_lock+0x2c/0x110 [ 49.350528] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.351081] ? lock_is_held_type+0x9f/0x120 [ 49.351613] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.352200] ? mtree_range_walk+0x632/0x900 [ 49.352740] ? mas_walk+0x5c7/0x7c0 [ 49.353207] do_vmi_munmap+0x1f1/0x2b0 [ 49.353821] mmap_region+0x1f9/0x2660 [ 49.354315] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.354830] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.355542] ? __pfx_lock_acquire+0x10/0x10 [ 49.356069] ? __pfx_mmap_region+0x10/0x10 [ 49.356597] ? security_mmap_addr+0x7d/0xa0 [ 49.357133] ? get_unmapped_area+0x1f5/0x3f0 [ 49.357704] do_mmap+0x854/0xf00 [ 49.358141] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.358631] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.359195] ksys_mmap_pgoff+0x3af/0x500 [ 49.359702] do_syscall_64+0x3f/0x90 [ 49.360179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.360828] RIP: 0033:0x7f744056fd82 [ 49.361284] 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 [ 49.363397] RSP: 002b:00007fff8ff1d148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.364286] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f744056fd82 [ 49.365230] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f743f9a9000 [ 49.366174] RBP: 00007f743f9a9000 R08: 0000000000000009 R09: 0000000000001000 [ 49.367080] R10: 0000000000000812 R11: 0000000000000206 R12: 00005647825a2f60 [ 49.367979] R13: 00007fff8ff1d160 R14: 00007fff8ff1d190 R15: 00007fff8ff1d4f0 [ 49.368901] [ 49.369208] [ 49.369441] Allocated by task 212: [ 49.369897] kasan_save_stack+0x22/0x50 [ 49.370412] kasan_set_track+0x25/0x30 [ 49.370902] __kasan_slab_alloc+0x59/0x70 [ 49.371417] kmem_cache_alloc+0x16b/0x370 [ 49.371949] vm_area_dup+0x20/0x160 [ 49.372400] __split_vma+0x170/0x950 [ 49.372867] split_vma+0xc6/0x110 [ 49.373304] mprotect_fixup+0x8d2/0xb30 [ 49.373829] do_mprotect_pkey+0x87e/0xd40 [ 49.374369] __x64_sys_mprotect+0x78/0xc0 [ 49.374912] do_syscall_64+0x3f/0x90 [ 49.375408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.376072] [ 49.376292] Freed by task 212: [ 49.376699] kasan_save_stack+0x22/0x50 [ 49.377219] kasan_set_track+0x25/0x30 [ 49.377750] kasan_save_free_info+0x2b/0x50 [ 49.378356] __kasan_slab_free+0x10a/0x190 [ 49.379038] kmem_cache_free+0x10d/0x4d0 [ 49.379625] rcu_core+0x8c8/0x2860 [ 49.380132] __do_softirq+0x1b7/0x7d4 [ 49.380675] [ 49.380926] Last potentially related work creation: [ 49.381643] kasan_save_stack+0x22/0x50 [ 49.382171] __kasan_record_aux_stack+0x8e/0xa0 [ 49.382786] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.383504] remove_vma+0x139/0x170 [ 49.383964] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.384522] do_vmi_munmap+0x1f1/0x2b0 [ 49.385008] __vm_munmap+0x138/0x3a0 [ 49.385496] __x64_sys_munmap+0x59/0x80 [ 49.386017] do_syscall_64+0x3f/0x90 [ 49.386582] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.387244] [ 49.387460] Second to last potentially related work creation: [ 49.388143] kasan_save_stack+0x22/0x50 [ 49.388651] __kasan_record_aux_stack+0x8e/0xa0 [ 49.389240] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.389941] remove_vma+0x139/0x170 [ 49.390404] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.390976] do_vmi_munmap+0x1f1/0x2b0 [ 49.391486] mmap_region+0x1f9/0x2660 [ 49.391989] do_mmap+0x854/0xf00 [ 49.392433] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.392944] ksys_mmap_pgoff+0x3af/0x500 [ 49.393477] do_syscall_64+0x3f/0x90 [ 49.393967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.394633] [ 49.394869] The buggy address belongs to the object at ffff88800efecd98 [ 49.394869] which belongs to the cache vm_area_struct of size 168 [ 49.396418] The buggy address is located 88 bytes inside of [ 49.396418] freed 168-byte region [ffff88800efecd98, ffff88800efece40) [ 49.397886] [ 49.398119] The buggy address belongs to the physical page: [ 49.398795] page:00000000adc25e41 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefec [ 49.399908] memcg:ffff88800f225401 [ 49.400352] flags: 0x100000000000200(slab|node=0|zone=1) [ 49.401027] page_type: 0xffffffff() [ 49.401513] raw: 0100000000000200 ffff88800879fc80 ffffea00005a2340 dead000000000004 [ 49.402469] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f225401 [ 49.403408] page dumped because: kasan: bad access detected [ 49.404089] [ 49.404311] Memory state around the buggy address: [ 49.404916] ffff88800efecc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 49.405819] ffff88800efecd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 49.406704] >ffff88800efecd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 49.407582] ^ [ 49.408420] ffff88800efece00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 49.409330] ffff88800efece80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 49.410238] ================================================================== [ 49.411312] Disabling lock debugging due to kernel taint [ 52.006405] BUG: Bad rss-counter state mm:00000000f15601df type:MM_FILEPAGES val:33 [ 52.007594] BUG: Bad rss-counter state mm:00000000f15601df type:MM_ANONPAGES val:22 [ 52.469007] BUG: Bad rss-counter state mm:00000000759989c8 type:MM_FILEPAGES val:33 [ 52.470173] BUG: Bad rss-counter state mm:00000000759989c8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17097' (ECDSA) to the list of known hosts. 2023/06/20 04:52:03 fuzzer started 2023/06/20 04:52:03 dialing manager at localhost:44161 2023/06/20 04:52:03 checking machine... 2023/06/20 04:52:03 checking revisions... [ 53.099245] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:52:04 testing simple program... [ 53.141525] cgroup: Unknown subsys name 'net' [ 53.181141] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:51:46 Registers: info registers vcpu 0 RAX=000000008f19d410 RBX=ffff88808f19d410 RCX=ffffffff8114313a RDX=dffffc0000000000 RSI=000000000f19d410 RDI=ffff88808f19d410 RBP=000000000f19d410 RSP=ffff888017e07cc8 R8 =0000000000000006 R9 =ffff88800f19d410 R10=ffff88808f19d410 R11=00000000000b6996 R12=0000000000000000 R13=ffffea0000266340 R14=ffffffff81ef13be R15=ffff88800989fa80 RIP=ffffffff814c02f8 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 00007f389aa1a900 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=00007ffefd324000 CR3=000000000cb2c000 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=563412feff00545000000000000080fe 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=00007f1ae77d43a0 CR3=0000000016baa000 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=2033303a32353a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a32353a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000