syzkaller login: [ 73.275432] BUG: Bad rss-counter state mm:00000000558bd972 type:MM_FILEPAGES val:33 [ 73.276730] BUG: Bad rss-counter state mm:00000000558bd972 type:MM_ANONPAGES val:22 [ 73.308340] ================================================================== [ 73.309045] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 73.309707] Read of size 8 at addr ffff8880162beed8 by task sshd/227 [ 73.310249] [ 73.310406] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 73.311027] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 73.311713] Call Trace: [ 73.311940] [ 73.312142] dump_stack_lvl+0x91/0xf0 [ 73.312488] print_report+0xcc/0x620 [ 73.312837] ? __virt_addr_valid+0x102/0x340 [ 73.313226] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.313661] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.314097] kasan_report+0xbe/0xf0 [ 73.314435] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.314877] vma_interval_tree_remove+0xc75/0xec0 [ 73.315319] vma_prepare+0xc54/0x11a0 [ 73.315661] __split_vma+0x5af/0x950 [ 73.315926] ? __pfx___split_vma+0x10/0x10 [ 73.316205] ? find_held_lock+0x2c/0x110 [ 73.316485] do_vmi_align_munmap+0x2ba/0x11f0 [ 73.316784] ? lock_is_held_type+0x9f/0x120 [ 73.317071] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 73.317391] ? mtree_range_walk+0x632/0x900 [ 73.317685] ? mas_walk+0x5c7/0x7c0 [ 73.317942] do_vmi_munmap+0x1f1/0x2b0 [ 73.318205] mmap_region+0x1f9/0x2660 [ 73.318461] ? vm_mmap_pgoff+0x15c/0x3a0 [ 73.318739] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 73.319126] ? __pfx_lock_acquire+0x10/0x10 [ 73.319410] ? __pfx_mmap_region+0x10/0x10 [ 73.319696] ? security_mmap_addr+0x7d/0xa0 [ 73.319977] ? get_unmapped_area+0x1f5/0x3f0 [ 73.320266] do_mmap+0x854/0xf00 [ 73.320501] vm_mmap_pgoff+0x1a6/0x3a0 [ 73.320880] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 73.321260] ksys_mmap_pgoff+0x3af/0x500 [ 73.321603] do_syscall_64+0x3f/0x90 [ 73.321925] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.322358] RIP: 0033:0x7f80ed02bd82 [ 73.322670] 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 [ 73.324145] RSP: 002b:00007ffdb3f03bc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 73.324762] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f80ed02bd82 [ 73.325340] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f80ec465000 [ 73.325923] RBP: 00007f80ec465000 R08: 0000000000000009 R09: 0000000000001000 [ 73.326503] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ae4b9a0ec0 [ 73.327084] R13: 00007ffdb3f03be0 R14: 00007ffdb3f03c10 R15: 00007ffdb3f03f70 [ 73.327668] [ 73.327862] [ 73.328007] Allocated by task 220: [ 73.328295] kasan_save_stack+0x22/0x50 [ 73.328636] kasan_set_track+0x25/0x30 [ 73.328969] __kasan_slab_alloc+0x59/0x70 [ 73.329325] kmem_cache_alloc+0x16b/0x370 [ 73.329676] vm_area_dup+0x20/0x160 [ 73.329986] __split_vma+0x170/0x950 [ 73.330301] split_vma+0xc6/0x110 [ 73.330594] mprotect_fixup+0x8d2/0xb30 [ 73.330934] do_mprotect_pkey+0x87e/0xd40 [ 73.331290] __x64_sys_mprotect+0x78/0xc0 [ 73.331639] do_syscall_64+0x3f/0x90 [ 73.331961] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.332392] [ 73.332536] Freed by task 13: [ 73.332791] kasan_save_stack+0x22/0x50 [ 73.333127] kasan_set_track+0x25/0x30 [ 73.333458] kasan_save_free_info+0x2b/0x50 [ 73.333821] __kasan_slab_free+0x10a/0x190 [ 73.334180] kmem_cache_free+0x10d/0x4d0 [ 73.334523] rcu_core+0x8c8/0x2860 [ 73.334827] __do_softirq+0x1b7/0x7d4 [ 73.335157] [ 73.335302] Last potentially related work creation: [ 73.335700] kasan_save_stack+0x22/0x50 [ 73.336040] __kasan_record_aux_stack+0x8e/0xa0 [ 73.336431] __call_rcu_common.constprop.0+0x6a/0xb90 [ 73.336867] remove_vma+0x139/0x170 [ 73.337172] do_vmi_align_munmap+0xd4a/0x11f0 [ 73.337541] do_vmi_munmap+0x1f1/0x2b0 [ 73.337872] __vm_munmap+0x138/0x3a0 [ 73.338182] __x64_sys_munmap+0x59/0x80 [ 73.338519] do_syscall_64+0x3f/0x90 [ 73.338836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.339270] [ 73.339410] The buggy address belongs to the object at ffff8880162bee80 [ 73.339410] which belongs to the cache vm_area_struct of size 168 [ 73.340403] The buggy address is located 88 bytes inside of [ 73.340403] freed 168-byte region [ffff8880162bee80, ffff8880162bef28) [ 73.341362] [ 73.341504] The buggy address belongs to the physical page: [ 73.341946] page:00000000fe5cac17 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x162be [ 73.342685] memcg:ffff88800da6f101 [ 73.342973] flags: 0x100000000000200(slab|node=0|zone=1) [ 73.343413] page_type: 0xffffffff() [ 73.343715] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 73.344331] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da6f101 [ 73.344937] page dumped because: kasan: bad access detected [ 73.345380] [ 73.345521] Memory state around the buggy address: [ 73.345912] ffff8880162bed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 73.346485] ffff8880162bee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 73.347074] >ffff8880162bee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 73.347517] ^ [ 73.347905] ffff8880162bef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 73.348353] ffff8880162bef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 73.348803] ================================================================== [ 73.349393] Disabling lock debugging due to kernel taint [ 75.114760] BUG: Bad rss-counter state mm:00000000c15aa1e2 type:MM_FILEPAGES val:33 [ 75.116094] BUG: Bad rss-counter state mm:00000000c15aa1e2 type:MM_ANONPAGES val:22 [ 75.479240] BUG: Bad rss-counter state mm:000000007f434b4e type:MM_FILEPAGES val:33 [ 75.480588] BUG: Bad rss-counter state mm:000000007f434b4e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33484' (ECDSA) to the list of known hosts. 2023/06/20 08:50:30 fuzzer started 2023/06/20 08:50:30 dialing manager at localhost:44161 2023/06/20 08:50:30 checking machine... 2023/06/20 08:50:30 checking revisions... [ 76.208057] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:50:30 testing simple program... [ 76.259396] cgroup: Unknown subsys name 'net' [ 76.297355] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:50:25 Registers: info registers vcpu 0 RAX=ffff88806ce0a001 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806ce09e01 RSI=ffff88806ce09e28 RDI=ffff88806ce09aa8 RBP=ffff88806ce09e28 RSP=ffff88806ce09a00 R8 =ffffffff861375e4 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020dae R12=0000000000000008 R13=ffff88806ce02000 R14=ffff88806ce09e30 R15=ffff88806ce09a98 RIP=ffffffff811304ce RFL=00000282 [--S----] 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 00007fe22d035900 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=00007ffe100b3000 CR3=000000000c4b4000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=ffff888008c58400 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=00007fa32621daf0 CR3=00000000158fa000 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=2039323a30353a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3733 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3733325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a30353a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000